CN219700762U

CN219700762U - Negative pressure change-over valve and anesthesia machine

Info

Publication number: CN219700762U
Application number: CN202320882916.9U
Authority: CN
Inventors: 高检燕; 赵俊杰; 邹龙龙; 蒙有作; 周蒙
Original assignee: Shenzhen Comen Medical Instruments Co Ltd
Current assignee: Shenzhen Comen Medical Instruments Co Ltd
Priority date: 2023-04-14
Filing date: 2023-04-14
Publication date: 2023-09-19
Anticipated expiration: 2033-04-14

Abstract

The utility model belongs to the field of medical equipment, and provides a negative pressure conversion valve, which comprises: the valve seat is provided with a plurality of gas outlets and a plurality of gas inlets, the rotary switching mechanism is rotatably arranged on the valve seat and used for switching on-off between the plurality of gas outlets and the plurality of gas inlets, the valve core is arranged on the valve seat and connected with the rotary switching mechanism and can synchronously rotate along with the rotary switching mechanism, the elastic locking piece is arranged on the valve core and at least partially exposed from the surface of the valve core, the valve core is covered by the valve cover, and a plurality of grooves matched with the elastic locking piece are formed in the valve cover. The utility model also provides an anesthesia machine. According to the utility model, under the condition that the negative pressure conversion valve is used, a user can obviously sense the change condition of the rotation switching mechanism to obtain change feedback, so that whether gear switching is in place or not can be clearly and directly judged, the condition that the gear switching is inaccurate is avoided, and the use of the device is convenient for the user.

Description

Negative pressure change-over valve and anesthesia machine

Technical Field

The utility model belongs to the field of medical equipment, and particularly relates to a negative pressure conversion valve and an anesthesia machine.

Background

The anesthesia machine is a medical device which can directly inhibit the central nervous system after the anesthetic is sent into alveoli of a patient through a mechanical loop to form partial pressure of anesthetic gas and dispersed into blood, thereby generating general anesthesia effect.

The negative pressure conversion valve is a control element widely applied in anesthesia machines, and obtains different negative pressure output states, such as negative pressure closing, negative pressure full power output, negative pressure adjustable output and the like, by controlling a negative pressure switch and a power output.

However, when the knob on the existing negative pressure conversion valve rotates, no gear feel feedback exists, a user needs to visually observe the rotation angle of the knob, and confirms the gear change of the knob through the change of the angle, so that the feedback effect is poor, whether the knob rotates in place is not easy to confirm, the user is inconvenient to confirm the gear switching condition, and the use of the user is not facilitated.

Disclosure of Invention

The utility model provides a negative pressure conversion valve, which aims to solve the technical problems that when a knob of the negative pressure conversion valve on the existing anesthesia machine rotates, no gear feel feedback exists, the gear switching condition is inconvenient to confirm by a user, and the use is inconvenient for the user.

In order to solve the above technical problems, an embodiment of the present utility model provides a negative pressure conversion valve, including:

the valve seat is provided with a plurality of gas outlets and a plurality of gas inlets;

the rotary switching mechanism is rotatably arranged on the valve seat and used for switching on/off between the gas outlets and the gas inlets;

the valve core is arranged on the valve seat and connected with the rotation switching mechanism and can synchronously rotate along with the rotation switching mechanism;

the elastic locking piece is arranged on the valve core and at least partially exposed from the surface of the valve core; and

the valve cover covers the valve core, and a plurality of grooves matched with the elastic locking piece are formed in the valve cover.

Optionally, the elastic locking member includes:

the shaft sleeve is characterized in that one end of the shaft sleeve is a closed end, and the other end of the shaft sleeve is an open end;

the ball is arranged at the open end and at least partially exposed from the open end to be matched with the groove; and

and the elastic element is abutted between the closed end and the ball.

Optionally, a mounting groove is formed in the valve core, and the elastic locking piece is arranged in the mounting groove and at least partially exposed from the mounting groove.

Optionally, the rotation switching mechanism includes:

a knob, the knob being located outside the valve seat;

the shaft core can rotate in the valve seat by taking the circle center shaft of the shaft core as a rotating shaft, the shaft core penetrates through the valve core and can drive the valve core to synchronously rotate, and the knob is arranged at one end of the shaft core, which is far away from the valve seat; and

the gas switching assembly is connected with the other end of the shaft core and is positioned in the valve seat, and the gas switching assembly and the shaft core synchronously rotate to switch on/off between a plurality of gas outlets and a plurality of gas inlets.

Optionally, the groove is strip-shaped.

Optionally, the number of the elastic locking pieces is two, and the two elastic locking pieces are oppositely arranged on the valve core.

Optionally, the elastic locking member includes:

the connecting part is arranged in the valve core; and

and the elastic contact part is exposed from the surface of the valve core and is matched with the groove.

Optionally, the plurality of grooves are uniformly distributed on the inner wall of the valve cover along the circumferential direction of the valve cover.

Optionally, the surface of the elastic locking piece exposed out of the valve core is an arc surface.

In a second aspect, an embodiment of the present utility model provides an anesthesia machine including a negative pressure conversion valve according to any one of the above.

In the negative pressure conversion valve provided by the utility model, the rotary switching mechanism is rotatably arranged on the valve seat, the valve seat is provided with the plurality of gas outlets and the plurality of gas inlets, and the on-off between the plurality of gas outlets and the plurality of gas inlets is switched through the rotary switching mechanism so as to realize negative pressure switching, so that the structure is simpler.

The valve core is connected with the rotary switching mechanism and can rotate along with the rotary switching mechanism, the elastic locking piece is arranged on the valve core and at least partially exposed on the surface of the valve core, the valve cover is used for covering the valve core, a plurality of grooves matched with the elastic locking piece are formed in the inner wall of the valve cover, the valve cover is arranged in such a way, a user can drive the valve core and the elastic locking piece to rotate under the condition that the rotary switching mechanism is rotated to switch on/off between a plurality of gas outlets and a plurality of gas inlets, the elastic locking piece can be continuously switched in the grooves of the valve cover and propped against the corresponding grooves, and the user can obviously sense the propped switching feedback between the elastic locking piece and the grooves.

That is, when the negative pressure switching valve provided by the embodiment of the utility model is used, a user can obviously sense the change condition of the rotation switching mechanism to obtain change feedback, so that whether the gear switching is in place or not can be clearly and directly judged, the gear switching condition is not required to be estimated roughly by the user in a visual inspection mode, the condition of inaccurate gear switching is avoided, and the use of the negative pressure switching valve is convenient for the user.

Drawings

Fig. 1 is a schematic structural diagram of a negative pressure switching valve according to an embodiment of the present utility model;

FIG. 2 is a schematic diagram of a negative pressure switching valve according to an embodiment of the present utility model;

FIG. 3 is an exploded view of a negative pressure switching valve according to an embodiment of the present utility model;

FIG. 4 is a schematic cross-sectional view of a negative pressure switching valve according to an embodiment of the present utility model;

fig. 5 is a schematic structural diagram of a valve cover of a negative pressure conversion valve according to an embodiment of the present utility model.

Description of main reference numerals:

the negative pressure switching valve 100, the valve seat 10, the rotation switching mechanism 20, the knob 201, the shaft core 202, the gas switching assembly 203, the valve core 30, the mounting groove 301, the elastic locking member 40, the sleeve 401, the closed end 4011, the open end 4012, the ball 402, the valve cover 50, and the groove 501.

Detailed Description

The present utility model will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present utility model more apparent. Examples of the embodiments are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements throughout or elements having like or similar functionality. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the utility model. Furthermore, it should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the present utility model.

In the description of the present utility model, it should be understood that the orientation or positional relationship indicated in the description of the direction and positional relationship is based on the orientation or positional relationship shown in the drawings, only for convenience of description of the present utility model and simplification of the description, and is not indicative or implying that the apparatus or element in question must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as limiting the present utility model.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more of the described features. In the description of the present utility model, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.

The following disclosure provides many different embodiments, or examples, for implementing different structures of the utility model. In order to simplify the present disclosure, components and arrangements of specific examples are described below. They are, of course, merely examples and are not intended to limit the utility model. Furthermore, the present utility model may repeat reference numerals and/or letters in the various examples, which are for the purpose of brevity and clarity, and which do not themselves indicate the relationship between the various embodiments and/or arrangements discussed. In addition, the present utility model provides examples of various specific processes and materials, but one of ordinary skill in the art will recognize the application of other processes and/or the use of other materials.

According to the technical scheme, under the condition that the user rotates the switching mechanism to switch the on-off between the plurality of gas outlets and the plurality of gas inlets so as to realize negative pressure switching, the valve core and the elastic locking piece are driven to rotate, and the elastic locking piece can continuously switch and support the corresponding groove in the plurality of grooves of the valve cover, so that the user can obviously sense the supported switching feedback between the elastic locking piece and the groove, and whether the switching is in place or not is judged more clearly and directly.

Example 1

Referring to fig. 1 to 5, a negative pressure switching valve 100 according to an embodiment of the present utility model includes:

a valve seat 10, wherein a plurality of gas outlets and a plurality of gas inlets are arranged on the valve seat 10;

a rotation switching mechanism 20, wherein the rotation switching mechanism 20 is rotatably arranged on the valve seat 10 and is used for switching on/off between a plurality of gas outlets and a plurality of gas inlets;

the valve core 30, the valve core 30 is set up on valve base 10 and connected with turning the switching mechanism 20, can rotate synchronously with turning the switching mechanism 20;

the elastic locking piece 40 is arranged on the valve core 30, and at least part of the elastic locking piece 40 is exposed from the surface of the valve core 30; and

the valve cover 50 covers the valve core 30, and a plurality of grooves 501 matched with the elastic locking piece 40 are arranged on the inner wall of the valve cover 50.

In the negative pressure switching valve 100 according to the embodiment of the present utility model, the rotation switching mechanism 20 is rotatably disposed on the valve seat 10, and a plurality of gas outlets and gas inlets are disposed on the valve seat 10, and the rotation switching mechanism 20 is used to switch the on-off state between the plurality of gas outlets and the plurality of gas inlets so as to realize the negative pressure switching, so that the structure is relatively simple.

The valve core 30 is connected with the rotation switching mechanism 20 and can rotate along with the rotation switching mechanism, the elastic locking piece 40 is arranged on the valve core 30 and at least partially exposes out of the surface of the valve core 30, the valve cover 50 is used for covering the valve core 30, the inner wall of the valve cover is provided with a plurality of grooves 501 matched with the elastic locking piece 40, the valve cover is arranged in such a way that a user can drive the valve core 30 and the elastic locking piece 40 to rotate under the condition that the rotation switching mechanism 20 is rotated to switch on/off between a plurality of gas outlets and a plurality of gas inlets, the elastic locking piece 40 can be continuously switched in the grooves 501 of the valve cover 50 and support against the corresponding grooves 501, and the user can obviously sense the support-against switching feedback between the elastic locking piece 40 and the grooves 501.

That is, when the negative pressure switching valve 100 of the present embodiment is used by a user, the user can obviously sense the change condition of the rotation switching mechanism 20 to obtain the change feedback, so that it is relatively clear and directly determine whether the gear switching is in place, and the user does not need to estimate the gear switching condition approximately in a visual inspection manner, so that the inaccurate gear switching condition is avoided, and the use of the negative pressure switching valve is convenient for the user.

Further, the valve seat 10 and the valve cover 50 are detachably connected, specifically can be in a screwed connection, a clamped connection or the like, and in the embodiment, the valve seat 10 and the valve cover 50 are detachably connected in a screwed connection mode, and the screwed connection mode is high in repeatability and stability and convenient to assemble and disassemble.

Specifically, the valve element 30 and the elastic locking member 40 are located in the valve cover 50 and are closed by the valve cover 50, and one portion of the rotation switching mechanism 20 is located in the valve seat 10, and the other portion passes through the valve cover 50 and is exposed to one side of the valve cover 50.

The elastic locking piece 40 has elasticity and flexibility, which is beneficial to the movement of the elastic locking piece 40 on the valve core 30 along the axial direction of the valve core 30, so that the elastic locking piece 40 can move towards the direction close to the groove 501 or away from the groove 501, the elastic locking of the elastic locking piece 40 and the groove 501 is realized, and the elastic locking of the valve core 30 and the valve cover 50 is realized.

In addition, the elastic locking piece 40 has elasticity, so that the occurrence of damage to the elastic locking piece 40 in the rotation process of the valve core 30 can be avoided, the service life of the elastic locking piece 40 is prolonged, and the service life of the negative pressure conversion valve 100 is prolonged.

It should be noted that, the elasticity of the elastic locking member 40 refers to that the elastic locking member 40 has an elastic deformation function, and in the case that the elastic locking member 40 is integrally formed, the whole elastic locking member 40 may be made of a rubber member; in the case where the elastic locking member 40 is formed in a separate body, the elastic locking member 40 may be formed by combining elastic members such as springs and hard members. Specifically, the design may be designed according to practical situations, and the design is not limited herein.

When the negative pressure switching valve 100 of the embodiment of the present utility model is operated, in an initial state, the elastic locking member 40 is abutted against the groove 501 on one of the inner walls of the valve cover 50, the groove 501 is at the initial position of the rotary switching mechanism 20, and since the portion of the elastic locking member 40 exposed out of the valve core 30 is located in the groove 501 and is limited by the groove 501, when the user rotates the rotary switching mechanism 20 through the palm to drive the valve core 30 to rotate relative to the valve seat 50, the elastic locking member 40 is abutted against the inner wall of the valve cover 50, the elastic locking member 40 is in a compressed state, and there is a force towards the inner wall of the valve cover 50.

When the rotation switching mechanism 20 continues to rotate, the valve core 30 is driven to rotate relative to the valve seat 50 until the elastic locking piece 40 rotates to the next groove 501, the elastic locking piece 40 stretches under the action of the above force to strike the groove wall of the groove 501, so that vibration feedback of 'click' can be formed on the palm of a user, namely that the rotation switching mechanism 20 is switched to a set position, when the elastic locking piece 40 rotates to other grooves 501, vibration feedback can be generated, and through the feedback mode, the user can judge whether the rotation switching mechanism 20 is switched in place or not more clearly and intuitively, and abnormal switching is avoided.

In the present embodiment, the groove 501 is recessed from the inner wall of the valve cover 50 toward a direction away from the elastic locking member 40, and the shape of its cross section is adapted to the shape of the part of the elastic locking member 40 exposing the valve core 30, so as to achieve a stable fitting engagement of the groove 501 and the elastic locking member 40.

Referring to fig. 3, further, there are two elastic locking members 40, and the two elastic locking members 40 are oppositely disposed on the valve core 30.

Therefore, vibration feedback received by the user is more obvious and balanced, and user experience is improved. In other embodiments, the number of the elastic locking members 40 may be three or four, and may be specifically designed according to practical situations, which is not limited herein.

Further, the surface of the elastic locking member 40 exposed from the valve core 30 is an arc surface.

By the arrangement, the damage of the valve cover 50 caused by the elastic locking piece 40 can be reduced, the elastic locking piece 40 can enter or leave the groove 501, and the structure is simple and easy to realize.

Referring to fig. 5, further, the grooves 501 are in a strip shape.

By this arrangement, the range of the groove 501 can be increased, the balls 402 can enter or be away from the groove 501, and the influence of assembly errors can be reduced. Of course, in other embodiments, the recess 501 may have other shapes, and may be specifically designed according to practical situations, which is not limited herein.

In this embodiment, the grooves 501 are uniformly distributed on the inner wall of the valve seat 50 along the circumferential direction of the valve cover 50, so that the time interval between the elastic locking member 40 entering the adjacent groove 501 from one groove 501 is the same, so that the control of the negative pressure conversion valve 100 is more accurate, and the use of the negative pressure conversion valve 100 by a user is facilitated.

More, the number of grooves 501 is 6, and the angle of two adjacent grooves 501 is 60 degrees, and 2 elastic locking pieces 40 are respectively embedded with 2 opposite grooves 501, so that the negative pressure switching valve 100 can realize the switching of three gears or functions and is subjected to vibration feedback at 3 different positions.

Further, in other embodiments, the elastic locking member 40 may be disposed on the inner wall of the valve cover 50, and the groove 501 may be formed on the surface of the valve core 30, so that the elastic locking member 40 and the groove 501 may be elastically locked, and thus the valve core 30 and the valve cover 50 may be elastically locked. Specifically, the design may be designed according to practical situations, and the design is not limited herein.

Example two

Referring further to fig. 1 to 5, the elastic locking member 40 further includes:

the shaft sleeve 401, one end of the shaft sleeve 401 is a closed end 4011, and the other end is an open end 4012;

a ball 402, the ball 402 being disposed at the open end 4012 and at least partially exposed from the open end 4012 for engagement with the recess 501; and

a resilient element (not shown) which abuts between the closed end 4011 and the ball 402.

In this embodiment, the elastic locking member 40 is manufactured by split molding, and the sleeve 401 has a hollow cylindrical structure, which can limit the moving direction between the elastic element and the balls 402, so that the balls 402 move along the axial direction of the sleeve 401, but not move towards the circumferential direction of the sleeve 401, which is beneficial to the operation of the elastic locking member 40. One end of the sleeve 401 is a closed end 4011, i.e. the end is a closed structure, and other structures cannot pass through, so that the situation that the elastic element is ejected from the sleeve 401 to drop due to the action of elastic force can be avoided, the working of the elastic element is facilitated, and the normal working of the elastic locking piece 40 is further ensured.

In this embodiment, the surface of the ball 402 is an arc surface, which facilitates the ball 402 to enter the groove 501 in a rolling or sliding manner or to leave the groove 501 in a rolling or sliding manner, and also facilitates the adaptation of the ball 402 and the groove 501 to realize the fitting locking of the elastic locking member 40 and the valve seat 50.

In addition, the other end of the shaft sleeve 401 is an open end 4012, that is, the end is in an open structure, so that other structures can pass through the end, and the diameter of the ball 402 is larger than the opening diameter of the open end 4012, so that part of the ball 402 is exposed from the open end 4012 to be matched with the groove 501, and the problem that the ball 402 falls off from the shaft sleeve 401 to affect the normal use of the elastic locking piece 40 can be avoided.

Still further, the elastic element includes, but is not limited to, a spring, a leaf spring, and other components with elastic deformation capability. In this embodiment, the elastic element is a spring, which has better elasticity and is easy to acquire and set.

In this embodiment, one end of the elastic element abuts against the closed end 4011, the other end abuts against the ball 402 to form an outward thrust to the ball 402, and the ball 402 abuts against the open end 4012, so as to form an elastic source of the elastic locking element 40 to form a vibration feedback to the palm of the user.

The two ends of the elastic element may be fixed to the ball 402 and the closed end 4011, or may be directly elastically abutted, wherein the fixed arrangement may be screw connection, adhesion, clamping connection, welding fixation, etc., and specifically may be designed according to practical situations, and is not limited herein.

When the negative pressure switching valve 100 according to the embodiment of the present utility model is operated, in an initial state, the ball 402 is pressed against the open end 4012 by the elastic force generated by the elastic element, so that the portion of the ball 402 exposed from the open end 4012 is elastically engaged in one of the grooves 501, thereby realizing the elastic locking of the valve core 30 and the valve cover 50.

When the user rotates the rotary switching mechanism 20, the valve core 30 rotates relative to the valve cover 50 to drive the elastic locking member 40 to rotate, meanwhile, the balls 402 rotate from the original groove 501 to other grooves 501, at this time, the balls 402 are pressed by the inner wall of the original groove 501 and the inner wall of the valve cover 50 between the adjacent grooves 501, and are pressed into the shaft sleeve 401, so that the elastic element is compressed, the whole length of the elastic locking member 40 is shortened, and the elastic locking between the valve core 30 and the valve cover 50 is released.

When the ball 402 rotates with the valve core 30 to the other groove 501 on the valve cover 50, the elastic element stretches and pushes the ball 402 to abut against the opening of the open end 4012 again, at this time, the elastic force provided by the elastic element makes the ball 402 and the groove 501 generate a certain impact sense, so as to generate a "click" vibration feedback, the overall length of the elastic locking member 40 lengthens to return to the original length, and the valve core 30 and the valve cover 50 are elastically locked again.

Example III

Referring to fig. 2 to 4, further, the valve core 30 is provided with a mounting groove 301, and the elastic locking member 40 is disposed in the mounting groove 301 and at least partially exposed from the mounting groove 301.

In this embodiment, through the setting of the mounting groove 301, the positioning of the elastic locking element 40 on the valve core 30 is facilitated, so that the elastic locking element 40 can be more conveniently mounted on the valve core 30, the portion of the elastic locking element 40 exposed out of the mounting groove 301 (such as the above ball 402 and the following elastic contact portion) is convenient to cooperate with the groove 501 to realize the elastic locking of the valve core 30 and the valve seat 50, and under the condition that the elastic locking element 40 is abnormal, a user can more conveniently replace or maintain the elastic locking element 40, so as to improve the practicability of the negative pressure conversion valve 100.

In other embodiments, the elastic locking member 40 may be integrally formed with the valve core 30, and the mounting groove 301 is not required.

Example IV

Referring to fig. 1 to 4, further, the rotation switching mechanism 20 includes:

a knob 201, the knob 201 being located outside the valve seat 10;

the shaft core 202 can rotate in the valve seat 10 by taking the center shaft of the shaft core 202 as a rotating shaft, the shaft core 202 penetrates through the valve core 30 and can drive the valve core 30 to synchronously rotate, and the knob 201 is arranged at one end, far away from the valve seat 10, of the shaft core 202; and

and the gas switching assembly 203 is connected with the other end of the shaft core 202 and is positioned in the valve seat 10, and the gas switching assembly 203 and the shaft core 202 synchronously rotate to switch on/off between a plurality of gas outlets and a plurality of gas inlets.

In the present embodiment, the rotation switching mechanism 20 includes a knob 201, a shaft core 202 and a gas switching assembly 203, the shaft core 202 is cylindrical to facilitate rotation, and the shaft core 202 is connected to the knob 201 and the gas switching assembly 203.

So set up, the user can drive axle core 202 together and rotate when rotatory knob 201, can drive the rotation of gas switching component 203 when axle core 202 rotates, that is to say, the user only need rotatory knob 201 can realize the rotation of gas switching component 203, and then changes the break-make between a plurality of gas outlets and the gas entry in order to realize negative pressure switching, simple structure.

More, knob 201 includes main part and extension, and the extension is from the main part to keeping away from the one end of case 30 extension, and the extension is approximately the strip and its volume is less than the volume of main part, so set up, the user can pinch the extension through thumb and forefinger and rotate knob 201 to comparatively convenient use negative pressure change-over valve 100, and can avoid the wrong circumstances that drops from knob 201 of user's hand, promote user's experience sense.

Further, in one embodiment, the extension portion may be provided with an anti-slip structure to enhance the friction between the palm of the user and the knob 201, where the anti-slip structure includes, but is not limited to, a protrusion, a soft rubber pad, etc., and may be specifically designed according to practical situations, and is not limited herein.

In one embodiment, a related function identifier may also be provided on the knob 201 or the valve seat 50, so that when the user rotates the knob 201 to a corresponding position, the current function of the negative pressure switching valve 100 and the switched gear can be clearly known.

It should be noted that, the gas switching assembly 203 is used to switch the on/off between the plurality of gas outlets and the plurality of gas inlets to achieve the negative pressure switching, so the gas switching assembly 203 may be a conventional mechanism for switching the plurality of gas outlets and the plurality of gas inlets in the negative pressure switching valve 100 in the art, and thus a detailed explanation is omitted, and of course, the gas switching assembly 203 may be designed in other special ways, and is not limited herein.

Example five

Still further, the elastic locking member 40 includes:

a connecting portion provided in the valve body 30; and

and an elastic contact part exposed from the surface of the valve body 30 and engaged with the groove 501.

In this embodiment, the elastic contact portion is made of an elastic material, and since the elastic contact portion has elasticity, the elastic contact portion can be elastically deformed by itself to be snapped into the groove 501 or separated from the groove 501, so as to achieve elastic locking or unlocking between the valve core 30 and the valve seat 50.

In one embodiment, the elastic locking member 40 may be formed integrally, i.e. the connecting portion and the elastic contact portion are integrally formed, so as to improve the integrity of the elastic locking member 40 and further improve the service life of the elastic locking member 40. Of course, in other embodiments, the elastic locking member 40 may be a split structure, that is, the connecting portion and the elastic contact portion are assembled after being manufactured separately, so that any one of the connecting portion and the elastic contact portion may be replaced after being damaged.

In one embodiment, only the elastic contact portion is made of an elastic material, such as rubber, and the connection portion is made of other materials, so that the elastic contact portion can be matched with the groove 501 only by elastic deformation. In another embodiment, the elastic locking member 40 is integrally made of an elastic material, so that the whole elastic locking member 40 can be elastically deformed, and the elastic locking member 40 is more convenient to adapt to the groove 501.

In this embodiment, the elastic locking member 40 is a unitary structure, and the whole is made of an elastic material.

Example six

Referring to fig. 1 to 5, an anesthesia machine according to an embodiment of the present utility model includes a negative pressure conversion valve 100 according to any of the above embodiments.

In the anesthesia machine of the embodiment of the utility model, the rotary switching mechanism 20 is rotatably arranged on the valve seat 10, a plurality of gas outlets and gas inlets are arranged on the valve seat 10, and the on-off between the gas outlets and the gas inlets is switched by the rotary switching mechanism 20 to realize negative pressure switching, so that the structure is simpler.

In the description of the present specification, the descriptions of the terms "embodiment one", "embodiment two", and the like, mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present utility model. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the utility model.

Claims

1. A negative pressure switching valve, characterized by comprising:

2. The negative pressure switching valve according to claim 1, wherein the elastic locking member includes:

and the elastic element is abutted between the closed end and the ball.

3. The negative pressure switching valve according to claim 1, wherein the valve spool is provided with a mounting groove, and the elastic locking member is provided in the mounting groove and at least partially exposed from the mounting groove.

4. The negative pressure switching valve according to claim 1, wherein the rotation switching mechanism includes:

a knob, the knob being located outside the valve seat;

5. The negative pressure switching valve according to claim 1, wherein the groove is in a strip shape.

6. The negative pressure switching valve according to claim 1, wherein the number of the elastic locking members is two, and the two elastic locking members are oppositely provided on the valve spool.

7. The negative pressure switching valve according to claim 1, wherein the elastic locking member includes:

the connecting part is arranged in the valve core; and

8. The negative pressure conversion valve according to claim 1, wherein the plurality of grooves are uniformly distributed on the inner wall of the valve cover in the circumferential direction of the valve cover.

9. The negative pressure switching valve according to claim 1, wherein a surface of the elastic locking member exposed to the valve spool is an arc surface.

10. An anesthesia machine, characterized in that it comprises a negative pressure changeover valve according to any one of claims 1 to 9.