KR20230113937A - Medical air valve - Google Patents

Abstract

The present invention relates to an air valve applied to a medical device, which is an air valve used in a medical device, comprising: a valve body having a suction port and a discharge port through which air enters and exits on an upper surface and a threaded portion formed on an inner lower portion; A core body that is inserted into the valve body and screwed together while a coupling block is integrally formed in the center of the upper surface; A bobbin that is inserted into the core body and fixed, while a coil is wound around the outer circumferential surface of the bobbin; a core inserted into the bobbin and provided to be screwed into the coupling block of the valve body; A support ring provided to be seated on the upper surface of the core body within the valve body; A leaf spring provided to be seated on the upper surface of the support ring; A plunger that is closely fixed to the lower surface of the leaf spring and is provided to be spaced apart from the core body; A packing member that penetrates the plate spring and the plunger and is coupled and fixed, and the upper surface thereof is provided in contact with the discharge port of the valve body; An air valve provided to communicate the suction port and the discharge port is provided.

Description

Air valve applied to medical devices {Medical air valve}

The present invention relates to an air valve, and more particularly, to an air valve applied to a medical device such as a medical air dryer for spraying air to an affected area to check an affected area in the medical field.

In general, among medical devices for supplying air used in hospitals, there are air dryers that spray clean compressed air, that is, air, and ventilators that artificially supply oxygen for treatment for disinfection of a patient's oral cavity or affected area.

Among these medical devices, an air dryer is connected to a compressor, so that compressed air generated by the compressor is introduced, and the introduced compressed air is supplied to the medical device to be sprayed to the affected area to be treated.

On the other hand, such a medical device for supplying air is provided with an air valve for controlling the supply of air.

These air valves are applied and used in various shapes and structures throughout the industry, and air valves used in medical devices in particular must be configured to supply harmless air to the human body due to the nature of medical care.

Particularly, if the conventional air valve is described with reference to FIG. 1 of the drawings of the present invention, the conventional air valve has a core body and a core inserted into the valve body, respectively, and a non-magnetic ring between the core and the core body. A plate was interposed separately to fix the core and the core body integrally.

At this time, one side of the ring plate is welded and fixed to the core body, and the other side is welded and fixed to the core to integrally connect the core and the core body.

And, the core body in which the core is integrated is separately welded and fixedly provided in a state inserted into the valve body.

However, in the conventional air valve, there was a problem that the bonding force thereof was weak despite fixing the non-magnetic ring plate to the core and the core body by laser welding at four places.

In addition, since the core body and the valve body are also provided to be fixed by welding, workability and productivity are lowered due to the increase in welding processes performed several times, and the defect rate of products due to defects in welding work increases. .

Republic of Korea Utility Model Publication No. 20-2018-0000967

Therefore, the present invention has been made to solve the problems of the prior art as described above, and by providing each part of an air valve applied to a medical device by screwing together without a welding process, a strong bonding force can be maintained and compatibility of parts can be improved. Its purpose is to provide an air valve that is easily applied to medical devices.

An air valve applied to a medical device according to the present invention for achieving the above object is an air valve used in a medical device, and has a suction port and a discharge port through which air enters and exits on the upper surface, while a threaded portion is formed on the lower inner side. body; A core body that is inserted into the valve body and screwed together while a coupling block is integrally formed in the center of the upper surface; A bobbin that is inserted into the core body and fixed, while a coil is wound around the outer circumferential surface of the bobbin; a core inserted into the bobbin and provided to be screwed into the coupling block of the valve body; A support ring provided to be seated on the upper surface of the core body within the valve body; A leaf spring provided to be seated on the upper surface of the support ring; A plunger that is closely fixed to the lower surface of the leaf spring and is provided to be spaced apart from the core body; A packing member that penetrates the plate spring and the plunger and is coupled and fixed, and the upper surface thereof is provided in contact with the discharge port of the valve body; It is characterized by an air valve provided to communicate the suction port and the discharge port.

In addition, a non-magnetic ring plate is integrally formed between the core body and the coupling block, and the ring plate may be formed to a thickness of 0.5 mm.

In addition, the valve housing, leaf spring, and plunger directly contacting air flowing inside the air valve may be formed of SUS, and the packing member may be formed of nitrile rubber (NBR).

According to the air valve applied to the medical device of the present invention, the air valve applied to the medical device is made of SUS material that is harmless to the human body, while each part constituting the air valve is screwed together and fixed without a welding process, so that each part is firmly secured between the parts. It is possible to maintain the bonding force, and the work thereof is easily performed, so that the productivity is improved, the defect rate is reduced, and the compatibility of the parts is facilitated.

1 is a combined and separated view of an air valve according to the present invention.
2 is a cross-sectional configuration diagram of an air valve according to the present invention.
3 is a cross-sectional view of a valve body included in an air valve according to the present invention.
4 is a cross-sectional view of a core body constituted in an air valve according to the present invention.
5 is a cross-sectional view showing an operating state of an air valve according to the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

The terms used in the present invention are terms defined in consideration of functions in the present invention, which may vary according to the intention or custom of the user or operator, so the definitions of these terms are meanings consistent with the technical details of the present invention. and should be interpreted as a concept.

In addition, the embodiments of the present invention do not limit the scope of the present invention, but are only exemplary of the components presented in the claims of the present invention, are included in the technical spirit throughout the specification of the present invention, and cover the scope of the claims. It is an embodiment including components that can be replaced as equivalents in components.

In addition, optional terms in the following embodiments are used to distinguish one element from other elements, and elements are not limited by the terms.

Therefore, in describing the present invention, detailed descriptions of related known technologies that may unnecessarily obscure the gist of the present invention will be omitted.

1 to 5 are views showing an air valve and components constituting the air valve according to the present invention.

The air valve 100 according to the present invention is a configuration applied to medical devices that supply air, and is made of SUS material harmless to the human body.

In particular, air used in medical devices is compressed air generated by a compressor. Since moisture is generated when the compressed air is generated by the compressor, air supplied to the medical device may contain a small amount of moisture. Accordingly, since rust may be generated in the air valve 100 where air continuously acts due to frequent contact with moisture, which may be harmful to the human body, the air valve 100 is made of SUS material that can prevent rust from occurring at the source. will be.

At this time, it is preferable that all of the metal materials of the parts constituting the air valve 100 are made of SUS material, but in some cases, parts directly in contact with air, that is, the valve body 110 to be described later, and the leaf spring 130 , The plunger 140 may be made of SUS material.

Meanwhile, as shown in FIGS. 1 and 2 , the air valve 100 as described above may largely include a valve body 110, a core body 160, and an opening/closing means.

First, the valve body 110 is made of SUS material capable of preventing rust, and as shown in FIGS. 2 and 3, the valve body 110 is formed of a hollow member with an open lower surface, and the upper surface has a suction port 113 through which air is sucked and discharged. ) and the discharge port 112 are formed, respectively.

In particular, a connecting protrusion 111 protrudes outward from the center of the upper surface of the valve body 110 and is inserted into and coupled to the air line (hose) of the medical device. (112) is formed. In addition, one or more suction ports 113 are formed on the upper surface around the connection protrusion 111, and in this embodiment, a plurality of suction ports are illustrated as an example.

An expansion tube 114 having an expanded diameter is formed at the lower end of the valve body 110, a threaded portion 115 is formed on the inner circumferential surface of the expansion tube 114, and an inner circumferential surface of the expansion tube 114 on the top of the threaded portion 115. An insertion groove into which the O-ring 116 is inserted is formed, and the O-ring 116 inserted into the insertion groove protrudes to the inside of the expansion tube 114 and is provided to come into contact with the outer surface of the core body 160 to be described later, Confidentiality can be firmly maintained.

As shown in FIGS. 2 and 4 , the core body 160 is formed of a hollow member with an upper surface closed and an open lower surface.

A coupling block 161 is formed at the center of the upper surface of the core body 160, and a screw groove 162 into which the core 180 to be described later is screwed is formed on the lower surface of the coupling block 161.

At this time, a ring plate 163 is provided between the coupling block 161 and the core body 160, and the outer circumferential surface of the ring plate 163 is integrally formed with the core body 160, and the inner circumferential surface is a coupling block ( 161) is integrally formed. Therefore, the core body 160, the ring plate 163, and the coupling block 161 are integrally formed by the ring plate 163.

In addition, the ring plate 163 provided as described above is formed with a top and bottom thickness of 0.5t (mm), and when the thickness of the ring plate 163 exceeds 0.5t, the magnetic force generated in the core body 160 It is difficult to expect normal operation due to insufficient transmission, and if the weight is less than 0.5t, the connection between the core body 160 and the coupling block 161 may become weak. Therefore, it is most preferable that the ring plate 163 is formed to be 0.5t in order to smoothly transfer the magnetic force and maintain the strength and durability of the connecting portion.

In particular, the ring plate 163 is a non-magnetic material and may be provided with a different material from the core body 160 and the coupling block 161, which is to prevent the action of magnetic force from being affected as much as possible.

On the other hand, on the outer circumferential surface of the lower part of the core body 160 as described above, a threaded portion 164 corresponding to the threaded portion 115 on the inner circumferential surface of the valve body 110 is formed, and the core body 160 is inserted into the valve body 110. It is firmly coupled and fixed by screw fastening of both screw parts 115 and 164.

In addition, a plurality of connection holes 165 are formed at the lower end of the core body 160, and a power line for supplying power to the coil 171 to be described later is inserted into the connection holes 165 to supply power to the coil 171. Connected.

Also, the bobbin 170 is inserted and fixed into the core body 160, and the coil 171 is wound around the outer circumferential surface of the bobbin 170. When power is supplied to the coil 171 through the power line and current flows, induced electromotive force by the coil 171, that is, magnetic force, is generated in the core body 160, and the magnetic force passes through the core body 160. Thus, it acts on the opening and closing means to be described later.

A core 180 is inserted into the bobbin 170, and a coupling protrusion 181 protruding upward is formed at the center of the upper surface of the core 180, and a screw thread is formed on the outer circumferential surface of the coupling protrusion 181. , It is screwed into the screw groove 162 formed in the coupling block 161 of the core body 160.

In addition, a ring-shaped outer core 182 is provided at the lower end of the bobbin 170, and the outer core 182 is fitted to the lower end of the core 180 and fixed to the lower surface of the bobbin 170.

In addition, at the lower part of the outer core 182, a ring-shaped closing plate 190 inserted into and coupled to the lower end of the core 180 is provided in close contact with the lower surface of the outer core 182, and the lower part of the closing plate 190 A sealing member 191 for closing and sealing the lower end of the core body 160 is inserted into and fixed to the core body 160 . The sealing member 191 is preferably provided with an insulator.

On the other hand, the opening and closing means is movably inserted into the support ring 150 provided to be seated on the upper surface of the core body 160 between the core body 160 and the valve body 110, and the support ring 150 The provided plunger 140 made of SUS, the leaf spring 130 made of SUS seated on the upper surface of the plunger 140, and the plate spring 130 and the plunger 140 are coupled and fixed through the central portion, The upper surface includes a packing member 120 provided in contact with the outlet 112 of the valve body 110.

Nitrile-butadiene rubber (NBR) is a synthetic rubber made by low-temperature emulsion polymerization of acrylonitrile and butadiene, and the packing member 120 has excellent buffering and resilience, and has excellent oil resistance and chemical resistance. It is excellent and suitable for products that require oil and water resistance, such as packing or high-pressure hose.

Therefore, the packing member 120 made of nitrile rubber is lowered together with the plate spring 130 whose central portion is depressed downward by the magnetic force of the coil 171 and the plunger 140 which moves downward, and when the magnetic force disappears As it is raised and returned to its original position by the restoring force of the plate spring 130, the discharge port 112 of the valve body 110 is firmly blocked and closed.

In addition, the packing member 120 as described above is formed in a "T" shape, a disk-shaped opening and closing portion 121 is formed on the upper portion, and a plate spring 130 and a plunger are formed on the lower surface of the opening and closing portion 121 ( A shaft portion 122 passing through 140 is formed, and a disk-shaped support portion 123 protruding outwardly of the shaft portion 122 is formed on the lower surface of the shaft portion 122.

A leaf spring 130 and a plunger 140 are interposed between the opening/closing portion 121 and the support portion 123 formed as described above, and the opening/closing portion 121 is pressed in contact with the upper surface of the leaf spring 130, and the support portion 123 ) is pressed in contact with the lower surface of the plunger 140, so that the plate spring 130 and the plunger 140 are fixed in close contact with each other.

Therefore, a gap is formed between the plunger 140 and the core body 160, and a space in which the packing member 120 and the plunger 140 can move downward is secured by the gap.

In addition, as shown in FIGS. 1 and 2, the leaf spring 130 is formed as a disk, and its edge is seated on the support ring 150. In this state, the central portion of the leaf spring 130 is formed by magnetic force. It is depressed and bent (bent) downward, and returns to its original position when the magnetic force disappears.

For smooth operation of the leaf spring 130, since a plurality of through-holes 131 are formed in irregular shapes along the circumferential direction on the surface of the leaf spring 130, the central portion of the leaf spring 130 is affected by magnetic force. Elastic deformation that sinks downward can be easily achieved.

The plunger 140 on the lower surface of the leaf spring 130 is formed with an outer diameter smaller than the inner diameter of the support ring 150. Accordingly, the plunger 140 is moved down inside the support ring 150 when the leaf spring 130 is depressed, and is moved upward and returned to the original position when the leaf spring 130 returns.

That is, as current flows in the coil 171 in the core body 160, induced electromotive force (magnetic force) is generated, and the central portion of the leaf spring 130 is elastically depressed downward due to the magnetic force, thereby causing the valve body 110 to By opening the discharge port 112 of the valve body 110, the suction port 113 and the discharge port 112 communicate.

In the air valve 100 according to the present invention as described above, when external power is applied to the coil 171 and current flows in the coil 171, the induced electromotive force inside the core body 160 by the coil 171, that is, magnetic force is generated.

By the magnetic force generated in this way, a suction force acting from the top to the bottom is applied inside the valve body 110, and by this suction force, the central portion of the leaf spring 130 is pulled downward to cause bending.

Due to the bending of the plate spring 130, the plunger 140 is linearly moved downward in the support ring 150, and the packing member coupled and fixed thereto according to the movement of the plate spring 130 and the plunger 140 ( 120) is also moved downward as shown in FIG. 5 and is spaced apart from the outlet 112 of the valve body 110 so that the inlet 113 and the outlet 112 of the valve body 110 communicate with each other to supply air.

Thereafter, when the power is cut off, the magnetic force generated by the coil 171 disappears, and at the same time, the plate spring 130 is raised and returned to its original state, and the plunger 140 is raised to the original position by the restoring force of the plate spring 130. As the packing member 120 is also raised, the discharge port 112 of the valve body 110 is again blocked and closed.

Since the valve body 110, the core body 160, and the core 180, which are the main components of the air valve 100 that operate in this way, are fastened together by screwing, each part is fastened simply and quickly to be firmly secured. It can be fixed, and thus the compatibility of parts is improved.

In addition, the core body 160 is formed by integrally forming the ring plate 163 and the coupling block 161, and in addition, the ring plate 163 is formed to a thickness of 0.5t, so that the core body by the ring plate 163 ( 160) and the coupling block 161, as well as a solid connection, do not interfere with the transmission of magnetic force, so that the transmission of magnetic force is smooth.

Although the present invention has been described in detail through specific examples, this is for explaining the present invention in detail, the present invention is not limited thereto, and within the technical spirit of the present invention, by those skilled in the art It is clear that modifications and improvements are possible.

All simple modifications or changes of the present invention fall within the scope of the present invention, and the specific protection scope of the present invention will be clarified by the appended claims.

100: air valve 110: valve body
111: connection protrusion 112: discharge port
113: inlet 114: expansion pipe
115: screw part 116: O-ring
120: packing member 121: opening and closing part
122: shaft portion 123: support portion
130: plate spring 131: through hole
140: plunger 150: support ring
160: core body 161: coupling block
162: screw groove 163: ring plate
164: screw part 165: connecting hole
170: bobbin 171: coil
180: core 181: coupling protrusion
182: outer core 190: closing plate
191: sealing member

Claims (3)

As an air valve used in medical devices,
A valve body having a suction port and a discharge port through which air enters and exits on the upper surface, while a threaded portion is formed on the inner lower portion;
A core body that is inserted into the valve body and screwed together while a coupling block is integrally formed in the center of the upper surface;
A bobbin that is inserted into the core body and fixed, while a coil is wound around the outer circumferential surface of the bobbin;
a core inserted into the bobbin and provided to be screwed into the coupling block of the valve body;
A support ring provided to be seated on the upper surface of the core body within the valve body;
A leaf spring provided to be seated on the upper surface of the support ring;
A plunger that is closely fixed to the lower surface of the leaf spring and is provided to be spaced apart from the core body;
Including,
An air valve provided to communicate the inlet and outlet of the valve body while the packing member is moved as the leaf spring is bent by the magnetic force generated in the core body.
The method of claim 1,
An air valve in which a non-magnetic ring plate is integrally formed between the core body and the coupling block, and the ring plate is formed to a thickness of 0.5 mm.
The method of claim 1,
An air valve in which the valve housing, leaf spring, and plunger in direct contact with the air flowing inside the air valve are made of SUS, and the packing member is made of nitrile rubber (NBR).

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