CN216279622U

CN216279622U - Quick exhaust valve for inflating medical mattress

Info

Publication number: CN216279622U
Application number: CN202122785384.0U
Authority: CN
Inventors: 林弘
Original assignee: Guangdong Yuehua Medical Instrument Factory Co ltd
Current assignee: Guangdong Yuehua Medical Instrument Factory Co ltd
Priority date: 2021-11-15
Filing date: 2021-11-15
Publication date: 2022-04-12
Anticipated expiration: 2031-11-15

Abstract

The utility model relates to a quick exhaust valve for an inflatable medical mattress, which is characterized in that a guide sheet and a guide groove slide relatively in the rotation process of a valve cover, so that a sealing gasket of a covering part is in frictional contact with a valve seat only when an exhaust hole is completely covered, and a gap is formed between the lower surface of the valve cover and the upper surface of the valve seat when the quick exhaust valve is opened, so that exhaust can be performed through the gap, the abrasion degree of the sealing gasket is greatly reduced, the service life of the sealing gasket is prolonged, the air tightness when the sealing gasket is closed is further improved, and the service life of the exhaust valve is prolonged.

Description

Quick exhaust valve for inflating medical mattress

Technical Field

The utility model relates to an exhaust valve, in particular to a quick exhaust valve for an inflatable medical mattress.

Background

A plurality of exhaust pipelines are usually arranged on the inflatable medical mattress, and in the emergency situation that a patient needs to be rescued, the valves of the exhaust pipelines are opened to quickly exhaust the air in the mattress. The traditional inflatable medical mattress is generally provided with one exhaust valve for each exhaust pipeline, and a plurality of exhaust valves need to be opened during exhaust, which is time-consuming. In order to solve the above problems, the applicant previously applied a quick exhaust valve (patent No. CN 203348630U) for an inflatable medical mattress, which can simultaneously connect a plurality of exhaust pipes, and close or open a plurality of exhaust channels at one time when the valve is closed or opened, so as to achieve the purpose of quick exhaust, and can complete the exhaust of a plurality of groups of inflatable air bags at one time during the use of the inflatable mattress, and can be easily connected to a medical negative pressure pipe. However, when the exhaust valve is opened and closed by rotating the baffle plate, the sealing gaskets at the front ends of the exhaust passages rub against the rotating baffle plate, the sealing gaskets are easily abraded, the air tightness of the exhaust valve when the exhaust valve is closed can be reduced after the exhaust valve is opened and closed for many times, and the service life of the exhaust valve is shortened.

Disclosure of Invention

The utility model aims to provide a quick exhaust valve for an inflatable medical mattress, which can improve the air tightness when being closed and prolong the service life of the exhaust valve. The technical scheme is as follows:

a quick exhaust valve for an inflatable medical mattress comprises a valve seat, a valve cover and a rotary positioning mechanism, wherein the rotary positioning mechanism is arranged between the valve seat and the valve cover, a plurality of exhaust passages are formed in the valve seat, a plurality of exhaust holes communicated with the exhaust passages are formed in the upper surface of the valve seat, a plurality of covering parts corresponding to the exhaust holes are formed in the lower surface of the valve cover, and sealing gaskets are arranged on the covering parts; the method is characterized in that: the rotary positioning mechanism comprises a spring cavity, a rotating shaft, a compression spring, a guide groove and a guide sheet; the spring cavity is arranged on the valve cover, the rotating shaft is vertically arranged on the valve seat, the lower cavity wall of the spring cavity is provided with a shaft hole, and the rotating shaft penetrates through the shaft hole and extends into the spring cavity; the compression spring is arranged in the spring cavity, the upper end of the compression spring is contacted with the upper cavity wall of the spring cavity, and the lower end of the compression spring is contacted with the lower cavity wall of the spring cavity; the guide groove is formed in the lower surface of the valve cover, the direction of the guide groove is consistent with the rotating direction of the valve cover, and the depth of the guide groove is from shallow to deep along the rotating direction of the valve cover; the guide piece is fixedly arranged on the valve seat, the shape of the guide piece is matched with that of the guide groove, and the height of the guide piece is consistent with the maximum groove depth of the guide groove.

Above-mentioned valve gap is at the rotation in-process, takes place relative slip between guide plate and the guide way: in the process of closing the quick exhaust valve, the guide sheet slides relatively from one side of the shallower groove bottom of the guide groove to one side of the deeper groove bottom, when the guide sheet is positioned at the deepest part of the groove bottom, the guide sheet is completely inserted into the guide groove, the covering part is completely covered on the exhaust hole, and the sealing gasket is tightly contacted with the edge of the exhaust hole, so that the air leakage phenomenon is avoided; and in the process of opening the quick exhaust valve, the guide sheet slides relatively from one side of the deeper groove bottom of the guide groove to one side of the shallower groove bottom, and when the guide sheet is positioned at the shallowest part of the groove bottom, the guide sheet is higher than the minimum groove depth of the guide groove, so that a gap exists between the lower surface of the valve cover and the upper surface of the valve seat, and exhaust can be performed through the gap. The user can rotate the valve gap, changes the grafting relation of guide vane and guide way to realize quick exhaust valve's switching.

The compression spring is used for applying downward pressure to the lower surface of the valve seat, so that the groove bottom of the guide groove and the upper edge of the guide sheet are always kept in a contact state in the rotating process of the valve cover.

Because when the exhaust valve switches the on-off state, the sealing washer of the covering part is in friction contact with the valve seat only when the exhaust hole is completely covered, the abrasion degree of the sealing washer is greatly reduced, the service life of the sealing washer is prolonged, the air tightness when the exhaust valve is closed is further improved, and the service life of the exhaust valve is prolonged.

As a preferred scheme of the utility model, the guide groove sequentially comprises a shallow groove, a transition groove and a deep groove which are connected according to the rotation direction of the valve cover, the depth of the deep groove is greater than that of the shallow groove, and the bottom of the transition groove is an arc inclined plane extending from the deep groove to the shallow groove; the guide piece is an arc-shaped insertion piece, and the length of the arc-shaped insertion piece is matched with the deep groove and the shallow groove. When the valve cover rotates, the guide groove and the arc-shaped inserting sheet slide relatively, when the arc-shaped inserting sheet is positioned in the deep groove, the arc-shaped inserting sheet is completely inserted into the deep groove, the covering part is completely covered on the exhaust hole, the sealing gasket is tightly contacted with the edge of the exhaust hole, and the exhaust valve is in a closed state; when the arc-shaped inserting sheet is positioned in the shallow groove, the depth of the shallow groove is smaller than that of the deep groove, so that the arc-shaped inserting sheet cannot be completely inserted, a gap capable of exhausting air exists between the arc-shaped inserting sheet and the shallow groove, and the exhaust valve is in an open state.

As a further preferable scheme of the present invention, the groove bottom of the transition groove includes a high inclined plane, a middle plane and a low inclined plane which are connected, the high inclined plane is connected with the groove bottom of the deep groove, the low inclined plane is connected with the groove bottom of the shallow groove, and the inclination of the high inclined plane is greater than that of the low inclined plane; and two ends of the arc-shaped inserting piece are respectively provided with a first inclined plane corresponding to the high inclined plane and a second inclined plane corresponding to the low inclined plane. When rotating the valve gap, first inclined plane and high inclined plane contact cooperation, second inclined plane and low inclined plane contact cooperation make the arc inserted sheet rotate in the guide way more smoothly.

As a further preferable scheme of the present invention, the number of the guide grooves is two, the number of the arc-shaped insertion pieces is two, and the two arc-shaped insertion pieces are oppositely arranged on the valve seat.

As a preferable scheme of the present invention, a first convex edge protruding upwards is arranged along the edge of the exhaust hole, the covering part comprises a second convex edge which is annular or semi-annular and protruding downwards, and the first convex edge is matched with the second convex edge. When quick discharge valve closed, the second chimb of portion of closing and the first chimb contact cooperation at exhaust hole border further improve the gas tightness.

As a preferred scheme of the utility model, the spring cavity comprises a cavity cover and a cavity body, and the rotary positioning mechanism further comprises a locking screw and a locking nut; the cavity cover is provided with a first through hole for a locking screw to pass through, the rotating shaft is provided with a second through hole for the locking screw to pass through along the length direction of the rotating shaft, the lower surface of the valve seat is provided with a third through hole corresponding to the first through hole, and the radius of the third through hole is larger than that of the second through hole; the locking nut is matched with the third through hole, the locking screw sequentially penetrates through the first through hole, the second through hole and the third through hole, and the lower end of the locking screw is in threaded connection with the locking nut. The cavity cover is locked on the cavity body through a locking screw and a locking nut, and downward pressure is applied to the compression spring; and compression spring all has pressure to upper and lower two directions owing to self elasticity effect, because lock nut is in the third through-hole, and the radius of third through-hole is greater than the radius of second through-hole, therefore lock nut receives the limiting displacement of second through-hole, blocks the locking screw rebound, and then makes the chamber lid can stably cover and close on the cavity.

Compared with the prior art, the utility model has the following advantages:

the quick exhaust valve for the inflatable medical mattress has the advantages that the guide sheet and the guide groove slide relatively in the rotating process of the valve cover, so that the sealing washer of the covering part is in frictional contact with the valve seat only when the exhaust hole is completely covered, the abrasion degree of the sealing washer is greatly reduced, the service life of the sealing washer is prolonged, the air tightness during closing is improved, and the service life of the exhaust valve is prolonged.

Drawings

FIG. 1 is a perspective view of a preferred embodiment of the present invention;

FIG. 2 is a cross-sectional view (with the handle removed) of a preferred embodiment of the present invention;

FIG. 3 is a perspective view of the valve seat of FIG. 1;

FIG. 4 is a bottom view of the valve cover of FIGS. 1 and 2;

wherein, each is marked as: 1-valve seat, 101-exhaust passage, 102-exhaust hole, 103-first convex edge, 2-valve cover, 201-cover part, 202-second convex edge, 203-sealing washer, 3-rotary positioning mechanism, 301-spring cavity, 3011-cavity cover, 3012-cavity, 302-rotating shaft, 303-compression spring, 304-guide groove, 3041-shallow groove, 3042-transition groove, 30421-high inclined plane, 30422-middle plane, 30423-low inclined plane, 3043-deep groove, 305-guide sheet (arc insertion sheet), 3051-first inclined plane, 3052-second inclined plane, 306-locking screw, 307-locking nut, 308-shaft hole, 309-first through hole, 310-second through hole, 311-third through hole, 4-handle, 401-screws.

Detailed Description

The following further describes the preferred embodiments of the present invention with reference to the accompanying drawings.

As shown in fig. 1 to 4, a quick release valve for an inflatable medical mattress comprises a valve seat 1, a valve cover 2 and a rotary positioning mechanism 3; the valve seat 1 is provided with a plurality of exhaust passages 101, the upper surface of the valve seat 1 is provided with a plurality of exhaust holes 102 communicated with the exhaust passages 101, a first convex edge 103 protruding upwards is arranged along the edges of the exhaust holes 102, the lower surface of the valve cover 2 is provided with a plurality of covering parts 201 corresponding to the exhaust holes 102, each covering part 201 comprises a second convex edge 202 protruding downwards in an annular or semi-annular shape, the first convex edge 103 is matched with the second convex edge 202, and the covering parts 201 are provided with sealing gaskets 203;

the rotary positioning mechanism 3 is arranged between the valve seat 1 and the valve cover 2, and the rotary positioning mechanism 3 comprises a spring cavity 301, a rotating shaft 302, a compression spring 303, two guide grooves 304, two guide sheets 305, a locking screw 306 and a locking nut 307; the spring cavity 301 is arranged on the valve cover 2, the rotating shaft 302 is vertically arranged on the valve seat 1, the lower cavity wall of the spring cavity 301 is provided with a shaft hole 308, and the rotating shaft 302 penetrates through the shaft hole 308 and extends into the spring cavity 301; the spring cavity 301 comprises a cavity cover 3011 and a cavity 3012, a first through hole 309 for the locking screw 306 to pass through is arranged on the cavity cover 3011, a second through hole 310 for the locking screw 306 to pass through is arranged on the rotating shaft 302 along the length direction of the rotating shaft, a third through hole 311 corresponding to the first through hole 309 is arranged on the lower surface of the valve seat 1, and the radius of the third through hole 311 is larger than that of the second through hole 310; the locking nut 307 is matched with the third through hole 311, the locking screw 306 sequentially passes through the first through hole 309, the second through hole 310 and the third through hole 311, and the lower end of the locking screw 306 is in threaded connection with the locking nut 307; the compression spring 303 is arranged in the spring cavity 301, the upper end of the compression spring 303 is in contact with the lower surface of the cavity cover 3011, and the lower end of the compression spring 303 is in contact with the bottom surface of the cavity 3012; in addition, in the embodiment, the cavity cover 3012 is further covered with a handle 4 for a user to rotate the valve cover 2, and the handle 4 is locked on the cavity cover 3012 by a screw 401;

the two guide grooves 304 are formed in the lower surface of the valve cap 2, the direction of the guide grooves 304 is consistent with the rotation direction of the valve cap 2, the guide grooves 304 sequentially comprise a shallow groove 3041, a transition groove 3042 and a deep groove 30433043 which are connected according to the rotation direction of the valve cap 2, the depth of the deep groove 3043 is greater than that of the shallow groove 3041, the bottom of the transition groove 3042 comprises a high inclined plane 30421, a middle plane 30422 and a low inclined plane 30423 which are connected, the high inclined plane 30421 is connected with the bottom of the deep groove 3043, the low inclined plane 30423 is connected with the bottom of the shallow groove 3041, and the inclination of the high inclined plane 30421 is greater than that of the low inclined plane 30423; the two guide pieces 305 are oppositely arranged on the valve seat 1, the guide pieces 305 are arc-shaped insertion pieces, the length of each arc-shaped insertion piece 305 is matched with the deep groove 3043 and the shallow groove 3041, and the height of each arc-shaped insertion piece 305 is consistent with the depth of the deep groove 3043; the two ends of the arc-shaped inserting piece 305 are respectively provided with a first inclined surface 3051 corresponding to the high inclined surface 30421 and a second inclined surface 3052 corresponding to the low inclined surface 30423.

During the rotation of the valve cover 2, the guide piece 305 and the guide groove 304 slide relatively: in the process of closing the quick exhaust valve, the guide sheet 305 slides from the shallow groove 3041 to the deep groove 3043, when the guide sheet 305 is completely positioned in the deep groove 3043, the covering part 201 completely covers the exhaust hole 102, the second convex edge 202 of the covering part 201 is in contact fit with the first convex edge 103 at the edge of the exhaust hole 102, and the sealing gasket 203 is in close contact with the edge of the exhaust hole 102, so that the air tightness is further improved, and the air leakage phenomenon is avoided; however, in the process of opening the quick exhaust valve, the guide piece 305 slides from the deep groove 3043 to the shallow groove 3041, and when the guide piece 305 is in the shallow groove 3041, since the depth of the shallow groove 3041 is smaller than the depth of the deep groove 3043, the guide piece 305 cannot be completely inserted, and a gap exists between the lower surface of the bonnet 2 and the upper surface of the valve seat 1, through which air can be exhausted. When the valve cap 2 is rotated, the first inclined surface 3051 is in contact engagement with the high inclined surface 30421, and the second inclined surface 3052 is in contact engagement with the low inclined surface 30423, so that the arc-shaped insert piece 305 can be more smoothly rotated in the guide groove 304.

In addition, the cavity cover 3011 is locked on the cavity 3012 through the locking screw 306 and the locking nut 307, and downward pressure is applied to the compression spring 303 in the spring cavity 301; the compression spring 303 has pressure in both the upper and lower directions due to its own elastic force, and since the lock nut 307 is located in the third through hole 311, and the radius of the third through hole 311 is greater than the radius of the second through hole 310, the lock nut 307 receives the limiting action of the second through hole 310 and blocks the lock screw 306 from moving upward, so that the cavity cover 3011 can be stably covered on the cavity 3012, and finally, in the rotation process of the valve cover 2, the compression spring 303 always applies downward pressure to the lower surface of the valve seat 1, and the groove bottom of the guide groove 304 and the upper edge of the guide piece 305 always keep in contact.

According to the quick exhaust valve for the inflatable medical mattress, the splicing relation between the guide piece 305 and the guide groove 304 is changed by rotating the valve cover 2, so that the opening and closing switching of the quick exhaust valve is realized; because when the exhaust valve switches the on-off state, the sealing washer 203 of the covering part 201 only has friction contact with the valve seat 1 when the exhaust hole 102 is completely covered, the abrasion degree of the sealing washer 203 is greatly reduced, the service life of the sealing washer 203 is prolonged, the air tightness when the exhaust valve is closed is further improved, and the service life of the exhaust valve is prolonged.

In addition, it should be noted that the names of the parts and the like of the embodiments described in the present specification may be different, and the equivalent or simple change of the structure, the characteristics and the principle described in the present patent idea is included in the protection scope of the present patent. Various modifications, additions and substitutions for the specific embodiments described may be made by those skilled in the art without departing from the scope of the utility model as defined in the accompanying claims.

Claims

1. A quick exhaust valve for an inflatable medical mattress comprises a valve seat, a valve cover and a rotary positioning mechanism, wherein the rotary positioning mechanism is arranged between the valve seat and the valve cover, a plurality of exhaust passages are formed in the valve seat, a plurality of exhaust holes communicated with the exhaust passages are formed in the upper surface of the valve seat, a plurality of covering parts corresponding to the exhaust holes are formed in the lower surface of the valve cover, and sealing gaskets are arranged on the covering parts; the method is characterized in that: the rotary positioning mechanism comprises a spring cavity, a rotating shaft, a compression spring, a guide groove and a guide sheet; the spring cavity is arranged on the valve cover, the rotating shaft is vertically arranged on the valve seat, the lower cavity wall of the spring cavity is provided with a shaft hole, and the rotating shaft penetrates through the shaft hole and extends into the spring cavity; the compression spring is arranged in the spring cavity, the upper end of the compression spring is contacted with the upper cavity wall of the spring cavity, and the lower end of the compression spring is contacted with the lower cavity wall of the spring cavity; the guide groove is formed in the lower surface of the valve cover, the direction of the guide groove is consistent with the rotating direction of the valve cover, and the depth of the guide groove is from shallow to deep along the rotating direction of the valve cover; the guide piece is fixedly arranged on the valve seat, the shape of the guide piece is matched with that of the guide groove, and the height of the guide piece is consistent with the maximum groove depth of the guide groove.

2. The quick exhaust valve according to claim 1 further characterized by: the guide groove sequentially comprises a shallow groove, a transition groove and a deep groove which are connected according to the rotation direction of the valve cover, the depth of the deep groove is greater than that of the shallow groove, and the bottom of the transition groove is an arc inclined plane extending from the deep groove to the shallow groove; the guide piece is an arc-shaped insertion piece, and the length of the arc-shaped insertion piece is matched with the deep groove and the shallow groove.

3. The quick exhaust valve according to claim 2 wherein: the bottom of the transition groove comprises a high inclined plane, a middle plane and a low inclined plane which are connected, the high inclined plane is connected with the bottom of the deep groove, the low inclined plane is connected with the bottom of the shallow groove, and the inclination of the high inclined plane is greater than that of the low inclined plane; and two ends of the arc-shaped inserting piece are respectively provided with a first inclined plane corresponding to the high inclined plane and a second inclined plane corresponding to the low inclined plane.

4. The quick exhaust valve according to claim 3 wherein: the quantity of guide way is two, the quantity of arc inserted sheet is two, and two arc inserted sheets set up relatively on the disk seat.

5. The quick exhaust valve according to any one of claims 1 to 4, characterized in that: follow the border of exhaust hole is equipped with the bellied first chimb that makes progress, the portion of closing including annular or semi-annular and bellied second chimb down, first chimb and second chimb phase-match.

6. The quick exhaust valve according to any one of claims 1 to 4, characterized in that: the spring cavity comprises a cavity cover and a cavity body, and the rotary positioning mechanism further comprises a locking screw and a locking nut; the cavity cover is provided with a first through hole for a locking screw to pass through, the rotating shaft is provided with a second through hole for the locking screw to pass through along the length direction of the rotating shaft, the lower surface of the valve seat is provided with a third through hole corresponding to the first through hole, and the radius of the third through hole is larger than that of the second through hole; the locking nut is matched with the third through hole, the locking screw sequentially penetrates through the first through hole, the second through hole and the third through hole, and the lower end of the locking screw is in threaded connection with the locking nut.