Speaking valve

Abstract

The utility model provides a kind of speaking valve, including frame, valve, the frame includes passage, baffle located in one end of the passage, connecting port located in the other end of the passage, the baffle is equipped with several air inlet holes, the valve is set in the side of the baffle close to the connecting port to block the air inlet hole when exhaling, the connecting port is equipped with limit block, the distance between the limit block and the baffle is greater than the radius of the valve.The utility model sets up limit block in connecting port to limit the depth that insertion tube is inserted into frame, and the distance between limit block and baffle is greater than the radius of valve, so that the end surface of insertion tube does not hinder the opening and closing of valve, realizes the smooth flow of gas, and guarantees the life safety of patient.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, and in particular to a speaking valve. Background Technology

[0002] With the improvement of people's living standards and changes in dietary structure, various diseases are gradually increasing, especially lung-related diseases. Patients with lung-related diseases often experience difficulty breathing, which requires tracheotomy for treatment.

[0003] Current tracheostomy procedures primarily involve cutting open the trachea in the neck and inserting a tracheostomy tube to allow the patient to breathe and prevent respiratory distress. However, patients are usually unable to speak after a tracheostomy. Therefore, a speech valve can be installed at the end of the tracheostomy tube to enable the patient to speak.

[0004] Existing speaking valves typically consist of an outer shell, a valve housed within the shell, and a tracheostomy cannula inserted into the shell to connect the two. However, the depth to which the tracheostomy cannula is inserted into the shell is often difficult to control precisely, making it easy for the cannula to be inserted too deeply. This can obstruct the opening and closing of the valve, leading to serious safety risks and threatening the patient's life. Utility Model Content

[0005] In order to overcome the above-mentioned technical problems, the present invention provides a speaking valve that can solve the above-mentioned technical problems.

[0006] Based on the above concept, the technical solution adopted by this utility model is as follows:

[0007] A speaking valve includes a frame and a valve. The frame includes a channel, a baffle at one end of the channel, and a connection port at the other end of the channel. The baffle has a plurality of air inlets. The valve is disposed on the side of the baffle near the connection port to block the air inlets during exhalation. The connection port has a limiting block. The distance between the limiting block and the baffle is greater than the radius of the valve.

[0008] Preferably, the frame is a silicone frame.

[0009] Preferably, the limiting block is annular and fixedly connected to the inner circumferential surface of the connection port.

[0010] Preferably, the limiting blocks are provided in multiple portions and are arranged at intervals along the circumferential direction on the inner circumferential surface of the connection port.

[0011] Preferably, the limiting block is integrally formed with the frame.

[0012] Preferably, in its natural state, the projection of the valve onto the baffle covers the air inlet.

[0013] Preferably, the sum of the areas S of all the air inlets satisfies S > 70 square millimeters.

[0014] Preferably, the light transmittance y of the frame satisfies y≥85%.

[0015] Preferably, the light transmittance of the frame is greater than that of the valve.

[0016] Preferably, the valve has several slits at its edge, the slits extending radially along the valve; and / or, the insertion tube is a three-way tube, the three-way tube including a first port, the first port being received within the connection port and sealed thereto.

[0017] This utility model has at least the following beneficial effects:

[0018] This invention limits the depth to which the end face of the insertion tube is inserted into the frame by setting a limiting block inside the connection port. At the same time, the distance between the limiting block and the baffle is greater than the radius of the valve, so that the end face of the insertion tube will not obstruct the opening and closing of the valve, thus enabling smooth gas flow and ensuring the patient's life safety. Attached Figure Description

[0019] Figure 1 This is a front view of one embodiment of the speaking valve of this utility model;

[0020] Figure 2 yes Figure 1 The image shown is a right view of the speaking valve of this utility model;

[0021] Figure 3 yes Figure 2 The figure shown is a cross-sectional view of the speaking valve of this utility model along line AA.

[0022] Figure 4 yes Figure 3 The diagram shown is a structural schematic of the speaking valve of this utility model.

[0023] Figure 5 yes Figure 4 A bottom view of one embodiment of the valve shown;

[0024] Figure 6 yes Figure 4 A bottom view of another embodiment of the valve shown;

[0025] Figure 7 This is an exploded view of the speaking valve and tracheostomy cannula of this utility model;

[0026] Figure 8 yes Figure 7 The figure shown is an assembly diagram of the speaking valve and tracheostomy cannula of this utility model.

[0027] Figure 9 This is a cross-sectional view of another embodiment of the speaking valve of this utility model.

[0028] Explanation of reference numerals: 100-Speaking valve; 1-Frame; 2-Baffle; 21-Air inlet; 22-Assembly hole; 3-Channel; 4-Connection port; 5-Valve; 51-Snap fastener; 52-Incision; 6-Limiting block; 7-T-connector; 71-First port; 72-Second port; 73-Third port; 200-Traction cannula. Detailed Implementation

[0029] The speech valve provided by the present invention will now be clearly and completely described in conjunction with the accompanying drawings. It is to be understood that the described embodiments are merely some, not all, embodiments of the present invention, and the present invention can be implemented in many other ways different from those described herein.

[0030] Unless otherwise defined, all technical and scientific terms used in this specification have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to limit the scope of the invention.

[0031] It should be noted that all directional indications in the embodiments of this specification are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0032] Furthermore, in this invention, descriptions involving "first," "second," etc., are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this specification, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0033] The technical solutions of the various embodiments of the present invention can be combined with each other, but only if they are based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by the present invention.

[0034] In this specification, axial direction refers to the direction parallel to the line connecting the distal and proximal centers of the component; radial direction refers to the direction perpendicular to the aforementioned axial direction.

[0035] In one embodiment, the present invention provides a speaking valve 100, including a frame 1 and a valve 5. The frame 1 includes a channel 3, a baffle 2 located at one end of the channel 3, and a connection port 4 located at the other end of the channel 3. Figures 1 to 8 As shown.

[0036] Preferably, the frame 1 can be a cylinder, or it can be a cone, cuboid or other geometric shape, etc., without specific limitations.

[0037] More preferably, the frame 1 is hollow, and its interior is used for gas flow, so that gas can enter the gas cutting sleeve 200 through the interior of the frame 1.

[0038] Preferably, the valve 5 is fixed inside the frame 1 to enable one-way flow of gas within the frame 1, meaning that only external gas can enter the tracheostomy tube 200 through the frame 1, while the gas inside the tracheostomy tube 200 will not flow out through the frame 1 to the outside, thus enabling the function of the speaking valve.

[0039] Preferably, the channel 3 is set inside the frame 1. The channel 3 can be a cylinder, a cone, a cuboid, or other geometric shapes. The specific shape can be set as needed and is not specifically limited here.

[0040] More preferably, the channel 3 extends along the axial direction of the frame 1, thereby allowing the gas in the channel 3 to flow axially.

[0041] Furthermore, the baffle 2 is disposed at the proximal end of the channel 3 and blocks the proximal end of the channel 3. The shape of the baffle 2 is adapted to the shape of the channel 3 so as to block the proximal end of the channel 3.

[0042] Furthermore, the baffle 2 is fixedly connected to the inner surface of the channel 3, thereby fixing it to the proximal end of the channel 3. The baffle 2 and the inner surface of the channel 3 can be fixedly connected by bonding or by integral molding, thereby simplifying the process and improving the structural stability.

[0043] Furthermore, the connection port 4 is located at the other end of the channel 3, and the channel 3 is located between the connection port 4 and the baffle 2. The connection port 4 can be a cylinder or other geometric shapes, etc., without specific limitations.

[0044] It should be noted that: the connection port 4 is connected to the channel 3, so that the gas entering the channel 3 can enter the connection port 4 and then enter the gas cutting sleeve 200, thus realizing the inflow of gas.

[0045] In one embodiment, the baffle 2 is provided with a plurality of air inlets 21, and the valve 5 is disposed on the side of the baffle 2 near the connection port 4 to block the air inlets 21 during exhalation, such as... Figures 1 to 8 As shown.

[0046] Preferably, the connection port 4 can be used to connect with an insertion tube, which is a pipe inserted into the connection port 4. The insertion tube can be an air-cutting sleeve 200, such as... Figure 7 Or as shown in Figure 8, the insertion tube can also be the first port 71 of the tee tube 7, such as... Figure 9 As shown, in other embodiments, the insertion tube can also be other pipes, which are not specifically limited here.

[0047] More preferably, the air inlet 21 extends axially through the end face of the baffle 2 to allow gas to flow axially.

[0048] It should be noted that: the axial direction is the direction of the central axis of channel 3, that is... Figure 3 The left and right directions on the horizontal line in the middle.

[0049] More preferably, one or more air inlets 21 can be provided, and when multiple air inlets 21 are provided, they can be arranged circumferentially or radially, etc. The specific arrangement can be selected and set as needed, and no specific limitation is made here.

[0050] More preferably, the air intake 21 can be circular, or it can be polygonal, elliptical or other geometric shapes. The specific shape can be set as needed and is not specifically limited here.

[0051] Furthermore, valve 5 is located on the side of baffle 2 near connection port 4, and valve 5 is fixedly connected to baffle 2. Preferably, the center of valve 5 is fixedly connected to baffle 2, so that during inhalation, external gas enters through air inlet 21 and exerts a thrust on valve 5, causing valve 5 to deform away from baffle 2, so that external gas enters channel 3 and then into tracheostomy cannula 200. During exhalation, gas in channel 3 flows towards air inlet 21, causing valve 5 to press tightly against the surface of baffle 2 and block all air inlets 21, thereby preventing gas in channel 3 from flowing to the outside through air inlets 21. In summary, the valve 5 effectively achieves unidirectional gas flow, that is, only external gas is allowed to enter cavity 3 through air inlet 21, while gas in cavity 3 cannot flow to the outside through air inlet 21.

[0052] Furthermore, in a natural state (without force), valve 5 can abut against baffle 2 or not, meaning there is a gap between valve 5 and baffle 2, which makes it easier for external air to flow into channel 3, suitable for patients with weaker respiratory capacity.

[0053] Furthermore, valve 5 can be circular, square, or other geometric shapes, and users can set it according to their needs; no specific limitations are made here.

[0054] It should be noted that valve 5 can be planar or curved, and can be set as needed; no specific limitation is made here.

[0055] In one embodiment, the connection port 4 is provided with a limiting block 6, and the distance w between the limiting block 6 and the baffle 2 is greater than the radius of the valve 5, such as... Figures 1 to 8 As shown.

[0056] Preferably, the limiting block 6 is disposed on the inner circumferential surface of the connection port 4. The limiting block 6 is fixed on the inner circumferential surface of the connection port 4. The limiting block 6 is disposed to prevent the insertion tube from extending too far into the connection port 4. For example, the end face of the insertion tube can abut against the limiting block 6 to limit the insertion tube from going deeper. This limits the insertion tube and prevents the insertion tube from being inserted too deeply into the connection port 4, which would affect the opening and closing of the valve 5.

[0057] It should be noted that when the insertion tube is a gas cutting sleeve, such as Figure 7 and Figure 8 As shown, the proximal end of the blast sleeve 200 is inserted into the connector 4, and the outer circumferential surface of the blast sleeve 200 abuts against the inner circumferential surface of the connector 4, thereby achieving a connection between the two. In other embodiments, to prevent gas leakage, a sealing ring can be provided between the outer circumferential surface of the blast sleeve 200 and the inner circumferential surface of the connector 4 to achieve a seal between the two.

[0058] It should also be noted that: when the insertion tube is a tee tube 7, such as Figure 9 As shown, the three-way pipe 7 includes a first port 71, which is housed in the connection port 4. The outer peripheral surface of the first port 71 abuts against the inner peripheral surface of the connection port 4, thereby achieving the connection between the two. In other embodiments, in order to prevent gas leakage, a sealing ring can be provided between the outer peripheral surface of the first port 71 and the inner peripheral surface of the connection port 4 to achieve the sealing between the two.

[0059] More preferably, the limiting block 6 is fixedly connected to the inner circumferential surface of the connection port 4, such as by bonding, so as to ensure the stability of the structure.

[0060] More preferably, the distance w between the limiting block 6 and the baffle 2 is the distance between the end face of the limiting block 6 facing the baffle 2 and the end face of the baffle 2 facing the limiting block 6, such as... Figure 3 As shown, valve 5 is located between limiting block 6 and baffle 2.

[0061] More preferably, the distance w between the limiting block 6 and the baffle 2 is greater than the radius d / 2 of the valve 5, so that the valve 5 opens with the gas entering from the air inlet 21 during inhalation. Since the middle part of the valve 5 is fixedly connected to the baffle 2, the maximum opening of the valve 5 is its radius, so it will not touch the limiting block 6 and the end face of the insertion tube. Therefore, the setting of the limiting part 6 will not hinder the opening and closing of the valve 5, ensuring the smooth progress of inhalation, and thus ensuring the patient's life safety.

[0062] In one embodiment, the frame 1 is a silicone frame.

[0063] Preferably, the frame 1 is made of silicone material, which is not only heat-resistant and convenient for daily disinfection, but also transparent, allowing observation of its internal condition to identify any dirt or blockages so that timely measures can be taken.

[0064] It should be noted that the frame 1 can also be made of other materials, and users can set it according to their needs. No specific restrictions are made here.

[0065] In one embodiment, the limiting block 6 is annular and fixedly connected to the inner circumferential surface of the connection port 4, such as... Figure 3 As shown.

[0066] Preferably, the limiting block 6 is annular and extends radially inward from the inner circumferential surface of the connection port 4, thereby conveniently fixing it inside the connection port 4 and achieving the limiting effect on the insertion tube, preventing it from being inserted too deeply and affecting the opening and closing of the valve 5.

[0067] More preferably, the limiting block 6 can be annular or other annular structures, etc., without specific limitations.

[0068] More preferably, the inner circumferential surface of the limiting block 6 and the connecting port 4 can be fixedly connected by bonding or other methods, which are not specifically limited here.

[0069] Preferably, the plane where the limiting block 6 is located is perpendicular to the central axis of the channel 3, so that the end face of the insertion tube can be fully abutted against the limiting block 6, effectively preventing it from extending excessively into the connection port 4.

[0070] In one embodiment, the limiting blocks 6 are provided in a plurality of form and are spaced apart along the circumferential direction on the inner circumferential surface of the connection port 4, such as... Figure 3 As shown.

[0071] Preferably, multiple limiting blocks 6 can be provided and spaced apart from each other, which can not only reduce the use of materials and reduce costs, but also effectively limit the insertion tube and prevent it from extending too far into the connection port 4.

[0072] More preferably, the limiting blocks 6 are arranged circumferentially on the inner circumferential surface of the connection port 4, so that they can all abut against the end face of the insertion tube.

[0073] More preferably, the multiple limiting blocks 6 are arranged at equal intervals, so that they can be evenly distributed, which facilitates production and manufacturing, improves efficiency, and can maintain uniform force.

[0074] Preferably, the plane containing the multiple limiting blocks 6 is collinear with the central axis of the channel 3, thereby ensuring that the end face of the insertion tube can abut against all the limiting blocks 6, which has a significant obstructing effect on the insertion tube.

[0075] More preferably, the side of the limiting block 6 near the insertion tube is a plane, thereby increasing the contact area with the end face of the insertion tube, reducing pressure, and improving structural stability.

[0076] In one embodiment, the limiting block 6 is integrally formed with the frame 1, such as... Figure 3 As shown.

[0077] Preferably, the limiting block 6 is integrally formed with the frame 1, which not only simplifies the process but also improves the stability of the structure.

[0078] It should be noted that the limiting block 6 and the frame 1 can also be fixedly connected in other ways, which are not specifically limited here.

[0079] In one embodiment, in its natural state, the projection of the valve 5 onto the baffle 2 covers the air inlet 21, such as... Figures 1 to 6 As shown.

[0080] Preferably, the valve 5 is projected along the axial direction of the channel 3 toward the plane where the baffle 2 is located, which represents the area covered by the valve 5. Therefore, when the projection covers the air inlet 21, the valve 5 can completely block the air inlet 21.

[0081] More preferably, the projection covers all the air inlets 21, thereby effectively preventing gas in the channel 3 from being discharged through the air inlets 21 during exhalation.

[0082] In one embodiment, the sum S of the areas of all the air inlets 21 satisfies S > 70 square millimeters, such as Figure 2 and Figure 3 As shown.

[0083] Preferably, the sum of the areas S of all air inlets 21 can be 71 square millimeters, 72 square millimeters, 73 square millimeters, 74 square millimeters, 75 square millimeters, 76 square millimeters, 77 square millimeters, 78 square millimeters, 79 square millimeters, 80 square millimeters, 90 square millimeters, etc. The specific value can be set as needed and is not specifically limited here.

[0084] More preferably, in order to achieve the best inhalation effect, the sum of the areas S of all air inlets 21 is 78 square millimeters, which helps to ensure smooth breathing for the patient.

[0085] It should be noted that the minimum inhalation area for adults is generally 40 to 57 square millimeters. By limiting the sum of the areas of all air inlets 21 to be greater than 70 square millimeters, it is possible to ensure that patients with weak breathing can maintain smooth breathing, reduce their pain, and enhance the therapeutic effect.

[0086] In one embodiment, the light transmittance y of the frame 1 satisfies y≥85%.

[0087] Preferably, the light transmittance y of the frame 1 can be 85%, 86%, 87%, 88%, 89%, 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, 99%, 100%, etc. The specific value can be set as needed and is not specifically limited here.

[0088] It should be noted that the aforementioned limitation on the range of light transmittance of frame 1 allows for a clear view of the internal condition of the speaking valve, such as whether there are foreign objects or blockages, thus facilitating timely intervention to ensure the patient's safety.

[0089] In one embodiment, the light transmittance of the frame 1 is greater than that of the valve 5, such as... Figures 1 to 6 As shown.

[0090] Preferably, the valve 5 is located inside the frame 1. When the light transmittance of the frame 1 is greater than that of the valve 5, the valve 5 can be clearly observed inside the frame 1 to determine whether the valve 5 is abnormal, such as whether it is damaged or not repositioned, so that timely measures can be taken.

[0091] In one embodiment, the edge of the valve 5 is provided with a plurality of incisions 52, the incisions 52 extending radially along the valve 5, such as... Figure 5 and Figure 6 As shown.

[0092] Preferably, the incision 52 is located at the edge of the valve 5. The incision 52 can make the edge of the valve 5 open more easily during inhalation, reduce gas resistance, and allow gas to enter the interior in a timely manner.

[0093] It should be noted that: the incision 52 is closed in the natural state or exhalation state in order to block the air inlet 21 and prevent gas from being discharged; while in the inhalation state, the edges of the valves 5 between adjacent incisions 53 are raised respectively and do not interfere with each other, so as to raise the larger angle with the smallest inhalation, ensuring the largest airflow area and the smallest resistance.

[0094] More preferably, the incision 52 extends radially along the valve 5, thereby making it easier for the edge of the valve 5 between adjacent incisions 52 to lift up.

[0095] More preferably, the cut 52 can be set as one, or two, or three. Figure 5 ) or four ( Figure 6 Five, etc., the specific value of the cut 52 can be set as needed, and no specific limit is made here.

[0096] Preferably, when there are multiple incisions 52, the multiple incisions 52 are arranged at equal intervals along the circumference of the valve 5, thereby preventing the edge area of ​​the valve 5 between some incisions 53 from being too large and requiring greater resistance to open, resulting in a significant reduction in the overall airflow area during inhalation.

[0097] More preferably, the length of the incision 53 is h, and the diameter of the valve 5 is d. Therefore, h / d is any value between 10% and 40%, such as 10%, 11%, 12%, 13%, 14%, 15%, 16%, 17%, 18%, 19%, 20%, 25%, 30%, 35%, 40%, etc. The specific value can be set as needed and is not specifically limited here.

[0098] It should be noted that the aforementioned limitation on the h / d ratio ensures the overall support of valve 5, preventing it from deforming in its natural state and affecting its gas-blocking effect. Furthermore, during inspiration, the edges of valve 5 can quickly deform and rise, allowing for rapid gas entry and ensuring smooth breathing for the patient. When the h / d ratio is less than 10%, the airflow area during inspiration is small, affecting respiratory efficiency. When the h / d ratio is greater than 40%, valve 5 is prone to deformation in its natural state, failing to seal all air inlets 21.

[0099] Furthermore, the optimal h / d ratio is 27%, which not only prevents valve 5 from deforming in its natural state, but also increases the airflow area, allowing the patient to breathe more smoothly.

[0100] In one embodiment, the valve 5 has a latching member 51, and the baffle 2 has an assembly hole 22. The latching member 51 passes through the assembly hole 22 and is latched to the baffle 2. Figures 3 to 6 As shown.

[0101] Preferably, the fastener 51 is located in the center of the valve 5 to ensure that the force is evenly distributed, so that the valve 5 around it can be deformed smoothly to block the air inlet 21 or allow external gas to pass through the air inlet 21 into the cavity 3, resulting in a more ideal blocking and air intake effect.

[0102] More preferably, the fastener 51 is fixedly connected to the valve 5, such as by bonding or by integral molding, to enhance the stability and strength of the structure and prevent the valve 5 from falling off the fastener 51 and affecting the one-way airflow.

[0103] More preferably, the mounting hole 22 extends through both ends of the baffle 2 along the axial direction, and the mounting hole 22 is preferably located at the center of the baffle 22.

[0104] Preferably, the fastener 51 passes through the mounting hole 22 and is fastened thereto, so that the valve 5 can be securely fixed on the baffle 2, and can also be easily disassembled, so as to facilitate the replacement of the valve 5 in the future, thereby extending the service life of the speaking valve 100 and reducing the later use cost.

[0105] More preferably, both the valve 5 and the fastener 51 are made of silicone material, which not only can withstand high temperatures, but also has a good sealing effect, preventing gas from passing through the assembly hole 22.

[0106] In one embodiment, the insertion tube is a tee tube 7, which includes a first port 71. The first port 71 is received within and sealed to the connection port 4, such as... Figure 9 As shown.

[0107] Preferably, the three-way pipe 7 includes a first port 71, a second port 72 and a third port 73, and the first port 71, the second port 72 and the third port 73 are interconnected.

[0108] More preferably, the first port 71 is received within and sealed to the connection port 4 to achieve communication between the interior of the three-way tube 7 and the channel 3. Specifically, the outer peripheral surface of the first port 71 abuts against the inner peripheral surface of the connection port 4 to achieve fixation and sealing; or, a sealing ring is provided between the outer peripheral surface of the first port 71 and the inner peripheral surface of the connection port 4 to achieve fixation and sealing. Furthermore, the end face of the first port 71 can abut against the limiting block 6 to prevent the length of the first port 71 extending into the connection port 4 from being too long and affecting the opening and closing of the valve 5.

[0109] Preferably, the second port 72 is used to connect with the air-cutting sleeve 200. The port of the air-cutting sleeve 200 extends into the second port 72 or the second port 72 extends into the air-cutting sleeve 200 to achieve a fixed connection and seal between the two, thereby enabling the tee pipe 7 to communicate with the interior of the air-cutting sleeve 200, facilitating the flow of gas.

[0110] Preferably, the third port 73 can be used to connect an oxygen connector so that it can not only enable the patient to speak, but also enable the patient to inhale oxygen to meet the patient's oxygen needs; or, the third port 73 can be used to connect a nebulizer connector so that it can not only enable the patient to speak, but also help the patient to nebulize to meet the purpose of treatment.

[0111] It should be noted that the third port 73 can also be used to connect other connectors, and it can be configured as needed. No specific limitations are made here.

[0112] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A speaking valve, characterized in that, The device includes a frame and a valve. The frame includes a channel, a baffle at one end of the channel, and a connection port at the other end of the channel. The baffle has several air inlets. The valve is positioned on the side of the baffle near the connection port to block the air inlets during exhalation. The connection port has a limiting block. The distance between the limiting block and the baffle is greater than the radius of the valve.

2. The speaking valve according to claim 1, characterized in that, The frame is a silicone frame.

3. The speaking valve according to claim 1, characterized in that, The limiting block is annular and fixedly connected to the inner circumferential surface of the connection port.

4. The speaking valve according to claim 1, characterized in that, The limiting blocks are provided in multiple portions and are arranged at intervals along the circumferential direction on the inner circumferential surface of the connection port.

5. The speaking valve according to claim 3 or 4, characterized in that, The limiting block is integrally formed with the frame.

6. The speaking valve according to claim 5, characterized in that, In its natural state, the projection of the valve onto the baffle covers the air inlet.

7. The speaking valve according to claim 6, characterized in that, The sum of the areas S of all the air intake holes satisfies S > 70 square millimeters.

8. The speaking valve according to claim 7, characterized in that, The light transmittance y of the frame satisfies y≥85%.

9. The speaking valve according to claim 8, characterized in that, The light transmittance of the frame is greater than that of the valve.

10. The speaking valve according to claim 9, characterized in that, The valve has several incisions along its edge, and the incisions extend radially along the valve.

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