A mask fixing device and an anesthesia airway assistance management instrument having the same

Abstract

The present invention relates to the technical field of medical devices, and particularly to a mask fixing device, comprising: a mask body, on which a base is provided; a fixing part, which is fixedly arranged on the base and has at least two working states; a drawstring, which passes through the fixing part so that after the drawstring is tightened, the mask body fits with the human face to ensure sealing; wherein, when the fixing part is in the first working state, the drawstring slides relative to the mask body, and when the fixing part is in the second working state, the drawstring is fixed relative to the mask body. The present invention ensures the fit of the mask with the human face through the drawstring, and then realizes the fixation of the drawstring and the mask through the fixing part of the drawstring installed on the mask. This structure is convenient to install and is suitable for ordinary medical oxygen masks.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and particularly to a mask fixing device and an anesthesia airway auxiliary management instrument having the same. Background Art

[0002] Mask ventilation belongs to non-invasive positive pressure ventilation (NPPV). The advantages of mask ventilation include: the airway management method causes less irritation to the patient, and the patient is more comfortable; it can avoid complications such as the destruction of the normal upper respiratory tract barrier function, upper respiratory tract injury, and respiratory tract infection caused by establishing an artificial airway. Implementing mask ventilation with an anesthesia airway auxiliary management instrument with a mandible lifting function can be used for acute and chronic respiratory failure caused by various reasons, effectively relieve dyspnea, strengthen gas exchange and improve oxygenation function, shorten the length of stay in the ICU and the total hospitalization time, reduce the mortality rate, and improve the quality of life.

[0003] However, in such surgeries, the oxygen mask bound to the patient's face still follows the conventional method (such as the Chinese utility model patent with the publication number CN203634611U). The doctor puts the holes on the four-head band on the buttons of the oxygen mask according to experience to tighten the oxygen mask. Since this method cannot accurately determine the tightening force at the four ends of the mask, air leakage often occurs. Although using a larger tightening force can avoid air leakage, it will cause discomfort to the patient, cause damage to the face, and affect the surgical experience. The Chinese invention patent application with the application number CN202110864614.4 and the name "Mask Tightening System and Anesthesia Airway Auxiliary Management Instrument" of the present inventor uses electric drive to contract the pull rope to press the mask, which greatly solves the problems of mask air leakage or poor patient experience in the prior art. However, in a large number of simulation experiments by the present inventor, there are still a few cases of mask air leakage. During the actual surgical process, once the mask leaks air, manual assistance is required for fixation, wasting medical staff's manpower, and if not discovered in time or not discovered, it may lead to the failure of anesthesia and increase the surgical risk. Therefore, how to further solve the mask air leakage of the anesthesia airway auxiliary management instrument is an urgent problem to be solved. Summary of the Invention

[0004] The inventor of the present invention has found through a large number of experimental studies that the phenomenon of mask air leakage has nothing to do with the operating state of the anesthesia airway assistance management device, but is related to the individual characteristics of the simulated experimental objects constructed by the inventor. Some simulated experimental objects always experience air leakage when using this device. The inventor further studies and finds that since the mask itself is an asymmetric structure in the up-down direction (here, the direction is defined as follows: with the mask fastened to the object's face, the forehead direction of the simulated experimental object is up and the chin direction is down), and the facial contours of each simulated experimental object constructed by the inventor are even more different in the up-down direction, an irregular chamber is formed between the mask and the face of the simulated experimental object. When supplying oxygen, the pressure inside the mask increases, causing the chamber to be filled with gas, and the gas generates an outward thrust on the mask. Due to the irregularity of the chamber, the thrusts received by each part of the mask are different, but the fastening position of the mask and the fastening force given by each drawstring are fixed, which will lead to unbalanced forces in the up-down direction. Moreover, the drawstrings are simply lapped on the connecting parts of the mask, so there will be a tiny slip between the mask and the drawstrings that is difficult to detect with the naked eye. When the pressure decreases, it will return to its original position due to the tension of the drawstrings. Therefore, the repeated oxygen supply brings about a slight "crawling" of the mask, resulting in mask air leakage.

[0005] In order to overcome the technical problems in the above-mentioned technology, a first aspect of the present invention provides a mask fixing device, including,

[0006] A mask body, on which a base is provided.

[0007] A fixing part, which is fixedly arranged on the base and has at least two working states.

[0008] A drawstring, which passes through the fixing part so that when the drawstring is tightened, the mask body fits closely to the human face to ensure sealing.

[0009] Wherein, when the fixing part is in the first working state, the drawstring slides relative to the drawstring, and when the fixing part is in the second working state, the drawstring is fixed relative to the drawstring.

[0010] The first working state is the state during the tightening process of the drawstring, and the second working state is the state after the drawstring is tightened.

[0011] Further, a connecting part is provided on the base, and the fixing part includes,

[0012] A base body, which is adapted to be connected to the connecting part;

[0013] An opening and closing part, which is movably arranged on the base body to press or loosen the drawstring;

[0014] A locking part, which is arranged on the base body to lock the opening and closing part on the base body.

[0015] Further, a shaft seat is also arranged on one side of the base body, and a flange extends from the opening and closing part. Among them,

[0016] The flange is rotatably arranged on the shaft seat through a support shaft.

[0017] Further, a support plate is also arranged on one side of the base body, and the opening and closing part further includes a pressing plate integrally connected with the flange. Among them,

[0018] The locking part is rotatably arranged on the support plate;

[0019] The support plate protrudes from the base body, and the top surface of the pressing plate is not higher than the top surface of the support plate, so that the rotation of the locking part can lock the opening and closing part.

[0020] Further, the locking part is a locking knob, and the locking knob includes a holding part, a pressing plate and a rotating shaft. Among them,

[0021] The holding part and the rotating shaft are located on both sides of the pressing plate, and the rotating shaft is rotatably arranged in the knob hole.

[0022] Further, an inclined surface is arranged on the surface of the pressing plate close to the rotating shaft.

[0023] Further, a mounting plate is also arranged on one side of the base body, and the opening and closing part further includes a pressing plate fixedly connected with the flange. Among them,

[0024] A clamping part is arranged on the mounting plate, and a buckling position adapted to the clamping part is arranged on the pressing plate.

[0025] Further, a groove is arranged on the base body, and the groove is suitable for accommodating the non-deformed part of the pull rope or the deformed part after being pressed.

[0026] Further, the connecting part includes a claw, and clamping sleeves are arranged on both sides of the base body. Among them,

[0027] The claw is adapted to the clamping sleeve to fixedly connect the base body and the connecting part.

[0028] The second aspect of the present invention provides an anesthetic airway auxiliary management instrument having the above-mentioned mask fixing device, which further includes a driving system, and the driving system is in transmission connection with the pull rope to control the length of the pull rope.

[0029] The present invention has at least the following beneficial effects: 1. The present invention realizes the fixation of the drawstring and the face mask through the drawstring fixing part installed on the face mask. After the drawstring is locked, the fixation of the drawstring and the face mask is realized, preventing the air leakage phenomenon of the anesthesia airway assistance management device; during the locking process, the drawstring remains free to cope with the uneven distribution of the pulling force of the locking system of the device.

[0030] 2. The fixing device of the present invention is provided with a groove structure on the base body, which can accommodate a part of the drawstring and make it into a "plug", improving the fixing effect of the drawstring.

[0031] 3. The structure of the present invention is simple and the device is small. Whether it is adapted to a common medical oxygen face mask or a special oxygen face mask, the assembly process is relatively simple, and it is very convenient for medical staff to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a schematic diagram of the face mask fastening system in the patent application with the application number CN202110864614.4;

[0033] Figure 2 It is a schematic diagram for analyzing the reasons for face mask air leakage;

[0034] Figure 3 It is an exploded schematic diagram of the overall structure of the first embodiment of the present invention;

[0035] Figure 4 It is an assembly schematic diagram of the overall structure of the first embodiment of the present invention;

[0036] Figure 5 It is an exploded schematic diagram of the fixing part structure of the first embodiment of the present invention;

[0037] Figure 6 It is a schematic diagram of the opening and closing part structure of the first embodiment of the present invention;

[0038] Figure 7 It is a schematic diagram of the locking part structure of the first embodiment of the present invention;

[0039] Figure 8 It is a schematic diagram of the fixing part structure of the second embodiment of the present invention;

[0040] Figure 9 It is a schematic diagram of the fixing part structure of the third embodiment of the present invention;

[0041] In the figure:

[0042] 100, face mask body, 110, base, 120, connecting part, 130, drawstring;

[0043] 200. Fixed part, 210. Base body, 211. Ferrule, 212. Axle seat, 213. Positioning hole, 214. Support shaft, 215. Groove, 216. Support plate, 217. Knob hole, 218. Mounting plate, 219. Fastening piece, 220. Opening and closing part, 221. Flange, 222. Through hole, 223. Pressure plate, 224. Latching position, 225. Arc edge, 230. Locking part, 231. Holding part, 232. Pressing plate, 233. Rotating shaft;

[0044] 300. Drive system. Detailed implementation manners

[0045] In order to enable those skilled in the art of the present technology to better understand the solution of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present invention.

[0046] As used herein, the term "one embodiment" or "embodiment" refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. In the description of the present invention, it should be understood that the orientation or positional relationship indicated by terms such as "upper", "top", "bottom", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation of the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of such features. Moreover, the terms "first", "second", etc. are used to distinguish similar objects and do not necessarily have to be used to describe a specific order or sequence. It should be understood that such data may be interchanged under appropriate circumstances so that the embodiments of the present invention described herein can be implemented in an order different from those illustrated or described herein.

[0047] Please refer to Figure 1, the anesthesia airway assistance management device includes a mask fastening system. The mask fastening system includes a drive system 300, a drawstring 130, and a mask. The mask used is a common medical oxygen mask, which includes a mask body 100, a base 110, and a connecting portion 120. After the patient wears the mask body 100, the doctor laps the drawstring 130 on the connecting portion 120 on the base 110 of the mask, starts to tighten the drawstring 130 by activating the drive system 300 until the drawstring 130 reaches an appropriate tightening force, and the drive system 300 maintains a locked state.

[0048] When the inventor used this device for simulation experiments, it was found that in still a few cases, the oxygen mask would leak air. Through a large number of experimental studies, it was found that the mask air leakage phenomenon has nothing to do with the operating state of the device, but is related to the individual characteristics of the simulation experiment objects constructed by the inventor. Some simulation experiment objects always have air leakage when using this device. Please refer to Figure 2 , the inventor further studied and found that since the mask body 100 is an asymmetric structure in the up-down direction (here, the direction is defined as follows: with the state where the mask body 100 is fastened to the object's face as the standard, the forehead direction of the simulation experiment object is up, and the chin direction is down), and the facial contours of each simulation experiment object constructed by the inventor are even more different in the up-down direction (in the actual future use scenario of the device, the facial contours of each patient will be the same as those of the simulation experiment objects, all different), thus an irregular chamber is formed between the mask body 100 and the face of the simulation experiment object. When supplying oxygen, the internal pressure of the mask body 100 increases, causing the chamber to be filled with gas, and the gas generates an outward thrust on the mask body 100. Due to the irregularity of the chamber, the thrusts received by each part of the mask body 100 are different, but the fastening position of the mask and the fastening force given by each drawstring 130 are fixed, which will cause an unbalanced force in the up-down direction. And the drawstring 130 is simply lapped on the connecting portion 120 of the mask, so there will be a tiny slip that is difficult to detect with the naked eye between the connecting portion 120 of the mask and the drawstring 130 (the inventor constructed a large number of marking points at the contact positions between the drawstring 130 and the connecting portion 120 of the mask, and between the mask body 100 and the face of the simulation experiment object, and used sensors to track the position changes of each marking point, and found that relative movements would occur between the marking points of the drawstring 130 and the connecting portion 120 of the mask, and between the marking points of the mask body 100 and the face of the simulation experiment object, thus discovering the tiny slip between the connecting portion 120 of the mask and the drawstring 130). When the pressure decreases, it will return to its original position due to the tension of the drawstring 130 (increasing the difficulty of discovering the cause of this problem). Therefore, the repeated oxygen supply brings about a slight "crawling" of the mask, resulting in mask air leakage.

[0049] Embodiment 1

[0050] As Figures 3 - 6As shown in the figure, the present invention provides a mask fixing device to solve the above problems, including: a mask body 100, a fixing part 200 and a drawstring 130; a base 110 is provided on the mask body 100, the fixing part 200 is fixedly arranged on the base 110 and has at least two working states, and the drawstring 130 passes through the fixing part 200, so that when the drawstring 130 is tightened, the mask body 100 fits closely with the human face to ensure sealing; wherein, when the fixing part 200 is in the first working state, the drawstring 130 slides relative to the mask body 100, and when the fixing part 200 is in the second working state, the drawstring 130 is fixed relative to the mask body 100. The first working state refers to the state during the tightening process of the drawstring 130, and the second working state refers to the state after the drawstring 130 is tightened. In the above solution, during the tightening process of the drawstring 130, please refer to Figure 1 , the drawstring 130 is divided into two parts (the left and right parts of the mask) and both are subjected to the tightening force given by the drive system 300. Due to factors such as friction in the intermediate transmission process, the tightening forces received by the two parts of the drawstring 130 cannot be exactly the same. Therefore, the drawstring 130 and the mask body 100 need to be in a free and slidable state, so that the drawstring 130 can slide slightly relative to the mask body 100 to adapt to the different tightening forces received. After tightening, the drawstring 130 and the mask body 100 are fixed by the fixing part 200 so that they cannot slide relative to each other. In this way, when the mask body 100 is subjected to an outward thrust due to the gas inside it, even if the up and down thrusts are different, due to the action of the drawstring 130, the mask body 100 can still be fixed differently, thus ensuring the sealing between the mask body 100 and the face of the simulated experimental object (or patient).

[0051] For example, when the lower part of the mask is subjected to a large force, since the drawstring 130 is fixed to the mask body 100 (which is also equivalent to being fixed to the fixing part 200), the length of the lower drawstring 130 will remain unchanged, and the length of the upper drawstring 130 will also remain unchanged, so that the position of the mask will not change. At this time, although the lengths of the lower drawstring 130 and the upper drawstring 130 are both unchanged, the tightening force provided by the lower drawstring 130 will increase, and the tightening force provided by the upper drawstring 130 will decrease.

[0052] Furthermore, please refer to Figure 4 , in this embodiment, the drawstring 130 is fixed in the fixing part 200, and the fixing part 200 is also relatively fixed to the mask body 100, so as to realize the relative fixation of the drawstring 130 and the mask body 100. In this embodiment, the same as the prior art, please refer to Figure 1 , a connecting part 120 is also provided on the base 110 of the mask, and an opening is provided in the middle of the base 110 for connecting an oxygen delivery pipe. Please refer to Figure 5, the fixing part 200 includes: a base body 210, an opening and closing part 220, and a locking part 230; the base body 210 is adapted to be connected to the connecting part 120, the opening and closing part 220 is movably arranged on the base body 210 to compress or relax the pulling rope 130, and the locking part 230 is arranged on the base body 210 to lock the opening and closing part 220 on the base body 210, so as to fix the pulling rope 130 between the opening and closing part 220 and the base body 210. The purpose of the opening and closing part 220 in this embodiment is to show that it has at least two action states of "open" and "closed". In the "open" state, it is convenient for the doctor to put the pulling rope 130 into it. In the "closed" state, it can compress the pulling rope 130 so that the pulling rope 130 and the fixing part 220 will not move relative to each other (i.e., slide), which is equivalent to that the pulling rope 130 and the mask body 100 will not move relative to each other. It can be understood that the opening and closing part 220 and the locking part 230 are not limited to one provided in this embodiment, and there can also be multiple ones to increase the reliability of fixation as long as the spatial layout allows. In addition, the opening and closing part 220 and the locking part 230 do not need to be arranged in one-to-one correspondence. Multiple locking parts 230 can be used to lock the same opening and closing part 220. For example, since the opening and closing part 220 is relatively long, two locking parts 230 can be evenly arranged on it to improve the locking effect; or the same locking part 230 can be used to lock multiple opening and closing parts 220. At this time, the locking part 230 needs to be located in the middle of the multiple opening and closing parts 220 to achieve simultaneous locking and minimize the occupied space as much as possible.

[0053] Further, please continue to refer to Figure 5, a shaft seat 212 is also provided on one side of the base body 210, a flange 221 extends on the opening and closing part 220. Among them, a positioning hole 213 is opened on the shaft seat 212, and a through hole 222 is provided on the flange 221. The support shaft 214 passes through the positioning hole 213 and the through hole 222, so that the flange 221 is rotatably arranged on the shaft seat 212. The opening and closing part 220 is rotatably arranged on the shaft seat 212 through the support shaft 214. There are two shaft seats 212, and the size of the flange 221 corresponds to the distance between the two shaft seats 212, so that the flange 221 is arranged between the two shaft seats 212. It can be understood that the support shaft 214 can also be integrally arranged with the flange 221, that is, a section of the support shaft 214 extends outward from both ends of the flange 221. At this time, there will no longer be a through hole 222 on the flange 221, and the support shaft 214 on the flange 221 passes through the positioning holes 213 on the two shaft seats 212. Similarly, the support shaft 214 can also be arranged on the two shaft seats 212, and the support shafts 214 on the two shaft seats 212 pass through the blind holes at both ends of the flange 221. This embodiment shows an implementation manner of the opening and closing part 220, that is, by arranging the support shaft 214 on the base body 210 and passing the support shaft 214 through one side of the opening and closing part 220, so that the opening and closing part 220 can rotate around the support shaft 214, thereby completing the opening and closing action relative to the base body 210. However, the present invention is not limited to this implementation manner, and those of ordinary skill in the art can also achieve the purpose of the present invention through other alternative ways that can realize the opening and closing action between the opening and closing part 220 and the base body 210. For example, in addition to rotational opening and closing, the opening and closing action between the opening and closing part 220 and the base body 210 can also be linear opening and closing, such as being realized through a reasonable way such as a linear guide rail.

[0054] In this embodiment, please refer to Figure 5 and Figure 6, a support plate 216 is also provided on one side of the base body 210. The opening and closing part 220 further includes a pressing plate 223 integrally connected to the flanging 221 (that is, the two are an integral whole, but are artificially divided into two functional parts). Of course, the pressing plate 223 and the flanging 221 can also be formed by a fixed assembly method. Among them, a knob hole 217 is formed on the support plate 216, and the locking part 230 is rotatably arranged in the knob hole 217; the purpose of setting the support plate 216 is to provide an installation basis for the locking part 230. If there is enough space on the base body 210, the support plate 216 may not be provided separately. In this embodiment, the support plate 216 protrudes from the base body 210. Specifically, the support plate 216 protrudes from the base body 210 in the height direction and protrudes outward from the base body 210 in the width direction; and in the "closed" state of the opening and closing part 220 (when there is no drawstring 130 inside at this time), the top surface of the pressing plate 223 is not higher than the top surface of the support plate 216, so that the locking part 230 can lock the opening and closing part 220 after rotation, that is, press the pressing plate 223. Of course, the top surface of the pressing plate 223 cannot be too much lower than the bottom surface of the support plate 216. The specific height difference needs to be determined by the friction force between the drawstring 130 and the base body 210 and the pressing plate 223, the deformation amount of the drawstring 130 under this friction force, and the ultimate deformation amount of the drawstring 130 (the smallest size after deformation). This friction force can enable the mask to resist the movement force between the drawstring 130 and the opening and closing part 220 under the pressure of the gas inside it, so that the two are relatively fixed. For example, the friction force needs to be ≥f, the pressure corresponding to this friction force f is F, the pressure F can make the radial dimension of the drawstring 130 shrink by d, the original radial dimension of the drawstring 130 is D1, and the minimum limit radial dimension is D2. Then the range of the height difference δ (the value that the top surface of the pressing plate 223 is lower than the top surface of the support plate 216) is D2 ≤ δ ≤ D1 - d. Setting the height difference δ between the top surface of the pressing plate 223 and the top surface of the support plate 216 within the above range can not only ensure that the locking part 230 can be rotated smoothly to press the pressing plate 223 (δ ≥ D2), but also ensure that there is a large enough pressure F between the drawstring 130 and the pressing plate 223, and between the drawstring 130 and the base body 210 (δ ≤ D1 - d). In this way, it ensures that there is enough friction force f to prevent relative movement (sliding) between the drawstring 130 and the opening and closing part 220. The support plate 216 is semi-circular, and the knob hole 217 is close to the straight edge of the semi-circle, which is convenient for the locking part 230 to rotate beyond the support plate 216 to press the opening and closing part 220. Similarly, in order to ensure that the fitting gap between the pressing plate 223 and the support plate 216 is as small as possible, the edge of the support plate 216 close to the pressing plate 223 is also set as a straight edge parallel to the straight edge of the semi-circle. It can be understood that the support plate 216 can also be other shapes, and the edge adjacent to the pressing plate 223 can also be a shape other than a straight edge, but the shape of the edge of the pressing plate 223 close to the support plate 216 should be similar to the shape of the edge of the support plate 216 adjacent to the pressing plate 223.In addition, regardless of the shapes of the pressing plate 223 and the supporting plate 216, the position of the knob hole 217 on the supporting plate 216 is set to be close to the edge of the pressing plate 223, that is, offset on the supporting plate 216 to make it closer to the pressing plate 223.

[0055] In this embodiment, the locking portion 230 is a locking knob, and the locking knob includes a holding portion 231, a pressing plate 232, and a rotating shaft 233. Among them, the holding portion 231 and the rotating shaft 233 are located on both sides of the pressing plate 232, and the rotating shaft 233 is rotatably arranged in the knob hole 217. In order to prevent the rotating shaft 233 from slipping out of the knob hole 217, structures such as pins and rivets can be provided at the bottom of the rotating shaft 233 to prevent the locking knob from detaching from the knob hole 217. The holding portion 231 is for the fingers of the operator (medical personnel) to hold. When rotating the locking knob, the pressing plate 232 can press the pressing plate 223 of the opening and closing portion 220, so as to relatively fix the pull rope 130 and the mask. When the pressing plate 232 presses the pressing plate 223, that is, when the pressing plate 232 extends out of the supporting plate 216, the function of pressing the pressing plate 223 can be realized. When the pressing plate 232 does not press the pressing plate 223, that is, when the pressing plate 232 does not extend out of the supporting plate 216, the release of the pressing plate 223 can be realized. Please refer to Figure 7 In order to realize the two states of the pressing plate 232 of "extending out of the supporting plate 216" and "not extending out of the supporting plate 216" during rotation, in this embodiment, a locking knob that is integrally in the shape of a cylinder and is formed by cutting off a part along the vertical direction is adopted. Specifically, the distance L1 from the straight edge formed after cutting to the center of the rotating shaft 233 should be ensured to be no greater than the distance L2 from the straight edge adjacent to the pressing plate 223 on the supporting plate 216 to the center of the knob hole 217, that is, L1 ≤ L2. In this way, it is ensured that the locking knob can not extend out of the supporting plate 216 when rotating to a certain angle, which is convenient for the pressing action of the pressing plate 223. In this embodiment, the locking knob can rotate 360°. Since only 180° rotation is required to complete the transformation between the above two states of the pressing plate 232, in other embodiments, a limiting structure can also be provided on the rotating shaft 233 and / or the knob hole 217 to limit the rotation angle of the locking knob to 180°, so that it is convenient for the operator to accurately adjust the pressing plate 232 to the above two states without the phenomenon of under-adjustment or over-adjustment.

[0056] Please continue to refer to Figure 7, in this embodiment, an inclined surface is provided on the surface of the pressing plate 232 close to the rotating shaft 233. Specifically, this inclined surface extends downward from the straight edge of the locking knob to the bottom surface of the pressing plate 232. This inclined surface facilitates the rotation of the pressing plate 232 and its insertion onto the pressing plate 223 of the opening and closing portion 220. As described above, the range of the height difference δ (the value by which the top surface of the pressing plate 223 is lower than the top surface of the support plate 216) is D2 ≤ δ ≤ D1 - d, where D1 is the original radial dimension of the pulling rope 130. When the pulling rope 130 is placed between the pressing plate 223 and the base body 210, the top surface of the pressing plate 223 after being pressed will be higher than the top surface of the support plate 216 by a value between d and D1 - D2. If the pressing plate 232 does not have this inclined surface, it will be difficult to rotate and insert it onto the pressing plate 223 of the opening and closing portion 220. In this embodiment, if the rotation angle of the locking knob is limited to 180°, this inclined surface can have only one. Of course, from the perspective of only achieving the function, this inclined surface can also not be provided, and instead, the operator (doctor) manually presses the pressing plate 223 against the base body 210 so that the top surface of the pressing plate 223 is not higher than the top surface of the support plate 216. In this state, the locking knob can be smoothly rotated to rotate the pressing plate 232 and insert it onto the pressing plate 223 of the opening and closing portion 220. The purpose of providing the inclined surface in this embodiment is to facilitate the operation of the operator (doctor).

[0057] Please refer to Figure 6 , arc edges 225 are provided on both sides of the pressing plate 223 to prevent the pulling rope 130 of the mask body 100 from being cut. Similarly, the portion of the base body 210 in contact with the pulling rope 130 is also provided with an arc edge. Since the pulling rope 130 does not pass through the opening of the fixing portion 200 in parallel when passing through the fixing portion 200, during the tensioning process, it will inevitably rub against some components (the base body 210 and the opening and closing portion 220) of the fixing portion 200. Therefore, arc edges are provided at the possible rubbing positions to prevent wear of the pulling rope 130 and improve the overall service life of the device.

[0058] Please refer to Figure 5, a groove 215 is further provided on the base body 210, and the groove 215 is adapted to accommodate the undeformed part of the pull rope 130 or the deformed part after being pressed. Of course, a protrusion can also be provided on the base body 210, and correspondingly, a groove is provided on the pressing plate 223. The groove 215 or the protrusion increases the friction between the pull rope 130 and the base body 210 and the opening and closing part 220, and further improves the reliability of fixing the pull rope 130. This design structure is equivalent to forming a "plug" with a part of the pull rope 130 and plugging it into the gap (the above-mentioned groove) between the pressing plate 223 and the base body 210. Therefore, the reliability of fixing the pull rope 130 can be further improved. Specifically, when the spatial dimension in the groove is larger than the original radial dimension D1 of the pull rope 130, the pull rope 130 in the groove space is undeformed and its size is much larger than the pressing gap between the pressing plate 223 and the base body 210. Therefore, the pull rope 130 in the groove space forms a "plug", which is difficult to pass through the above-mentioned pressing gap, improving the reliability of fixing the pull rope 130. Similarly, when the spatial dimension in the groove is smaller than the original radial dimension D1 of the pull rope 130 but larger than the size of the above-mentioned pressing gap, although the pull rope 130 in the groove space is deformed, the amount of deformation is smaller than that of the pull rope 130 in the above-mentioned pressing gap. Therefore, it can still play the role of a "plug". Although the effect may not be as good as the former, it can still improve the reliability of fixing the pull rope 130. Of course, in this embodiment, the first case is preferably selected, that is, the groove 215 is adapted to accommodate the undeformed part of the pull rope 130, in other words, the pull rope 130 in the groove 215 is not deformed.

[0059] Please refer to Figure 4 and Figure 5 , since the connecting part 120 of the conventional medical oxygen mask includes a claw, in this embodiment, clamping sleeves 211 are provided on both sides of the base body 210, wherein the claw is adapted to the clamping sleeves 211 to fixedly connect the base body 210 and the connecting part 120.

[0060] It should be noted that in this embodiment, it is preferred that the support shaft 214 is made of metal and the other components of the fixing part 200 are made of plastic, which can reduce the weight of the structure so as to reduce the burden borne by the patient's face. Of course, the support shaft 214 can also be made of other materials with light weight but high strength, such as polyimide PI, ceramic materials, etc.

[0061] This embodiment also provides an anesthesia airway auxiliary management device, which has the above-mentioned mask fixing device, and also includes a drive system 300, which is connected to the drawstring 130 in a transmission manner to control the length of the drawstring 130. The drive system 300 is composed of a motor with a self-locking function and a structural member that can reel in or unreel the drawstring 130 under the drive of the motor. The drawstring 130 is connected to the above-mentioned structural member through a transmission mechanism, and the drawstring 130 can be reeled in or unreeled under the rotation of the motor, thereby controlling the length of the drawstring 130 outside, and further controlling the pressing force of the drawstring 130 on the mask.

[0062] Working principle: When the device is used, the medical staff puts the patient's head on the device base in a specific posture, installs the ferrule 211 on the base body 210 and the claw on the mask body 100 together, and buckles the mask body 100 on the human face, then passes the drawstring 130 through the base body 210, drives the drive system 300, and after tightening the drawstring 130, the opening and closing part 220 presses the drawstring 130 on the base body 210, and turns the locking knob to lock the opening and closing part 220 on the base body 210, thereby fixing the drawstring 130 relative to the mask. After the device is used, the drive system 300 loosens the drawstring 130, turns the locking knob, so that the clamping plate 232 of the locking knob does not extend out of the support plate 216, that is, the clamping plate 232 does not press the pressing plate 223, and turns the pressing plate 223 to take out the drawstring 130. The above is only to illustrate the working principle and does not specifically limit the order of use of the various parts of the device.

[0063] Embodiment 2

[0064] The present embodiment is different from the first embodiment in that the fixing method between the pressing plate 223 and the base body 210 is different. The first embodiment uses a locking knob to fix the pressing plate 223, while the present embodiment uses a clamping structure to fix the pressing plate 223. Specifically, Figure 8 As shown, a mounting plate 218 is also provided on one side of the base body 210, and a clamp 219 is provided on the mounting plate 218, and a buckle 224 adapted to the clamp 219 is provided on the pressing plate 223. An inclined surface is provided at the upper end of the clamp 219 to facilitate the insertion of the clamp 219 into the buckle 224. At the same time, the clamp 219 has a certain flexibility, and the medical staff can move the clamp 219 to make it escape from the buckle 224 so as to open the pressing plate 223. Of course, the positions of the clamp 219 and the buckle 224 can be interchanged, that is, the clamp is provided on the pressing plate 223, and the buckle adapted to the clamp is provided on the mounting plate 218. Compared with the first embodiment, the pressing plate 223 of this embodiment is fixedly installed on the base body 210 through the clamping structure of the buckle 224 and the clamp 219, which is more convenient and quick for medical staff to use.

[0065] Embodiment 3

[0066] This embodiment is different from Embodiment 1 or Embodiment 2 in that: the face mask used is not a conventional medical oxygen mask, but a medical oxygen mask with a specific base. As Figure 9 shown, the base body 210 and the base 110 are integrally formed, that is, the fixing part 200 is integrally formed on the face mask. Since they are all plastic parts, the base body 210 and the base 100 can be manufactured using an injection molding process, which is simple and convenient. This embodiment simplifies the assembly process and no longer requires the use of the claw and the clamping sleeve 211 structures in Embodiment 1 or Embodiment 2 to install the base body 210, making it more convenient for medical staff to use. Of course, the integrally formed base body 210 and the base 110 can also be regarded as being connected through the connecting part 120, and the content of this embodiment should also be included within the protection scope of the claims.

[0067] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A mask fixing device, characterized in that, it includes: A mask body (100), a base (110) is provided on the mask body (100), and a connecting portion (120) is provided on the base (110); A fixing portion (200), the fixing portion (200) is fixedly arranged on the base (110) and has at least two working states; A drawstring (130), the drawstring (130) passes through the fixing portion (200), so that after the drawstring (130) is tightened, the mask body (100) fits with the human face to ensure sealing; The fixing portion (200) includes: A base body (210), the base body (210) is adapted to be connected to the connecting portion (120); An opening and closing portion (220), the opening and closing portion (220) is movably arranged on the base body (210) to press or relax the drawstring (130); A groove (215) is provided on the base body (210), and the groove (215) is adapted to accommodate the undeformed part of the drawstring (130) or the deformed part after being pressed; A locking portion (230), the locking portion (230) is arranged on the base body (210) to lock the opening and closing portion (220) on the base body (210); A shaft seat (212) is provided on one side of the base body (210), a flange (221) extends from the opening and closing portion (220), and the flange (221) is rotatably arranged on the shaft seat (212) through a support shaft (214); A support plate (216) is further provided on one side of the base body (210), The opening and closing portion (220) includes a pressing plate (223) fixedly connected to the flange (221), The locking portion (230) is rotatably arranged on the support plate (216), The support plate (216) protrudes from the base body (210), and the top surface of the pressing plate (223) is not higher than the top surface of the support plate (216), so that the rotation of the locking portion (230) can lock the opening and closing portion (220); Wherein, when the fixing portion (200) is in the first working state, the drawstring (130) slides relative to the mask body (100), and when the fixing portion (200) is in the second working state, the drawstring (130) is fixed relative to the mask body (100), The first working state is the state during the tightening process of the drawstring (130), and the second working state is the state after the drawstring (130) is tightened.

2. The mask fixing device according to claim 1, characterized in that, The locking portion (230) is a locking knob, and the locking knob includes a holding portion (231), a pressing plate (232) and a rotating shaft (233), wherein, The holding portion (231) and the rotating shaft (233) are located on both sides of the pressing plate (232), and the rotating shaft (233) is rotatably arranged in a knob hole (217) opened on the support plate (216).

3. The mask fixing device according to claim 2, characterized in that, One side of the pressing plate (232) close to the rotating shaft (233) is provided with an inclined surface.

4. The face mask fixing device according to claim 1, characterized in that the connecting portion (120) includes a claw, and clamping sleeves (211) are provided on both sides of the base body (210), wherein the claw is adapted to the clamping sleeve (211) to fixedly connect the base body (210) and the connecting portion (120).

5. An anesthetic airway assistance management instrument having the face mask fixing device according to any one of claims 1 to 4, characterized in that it further includes a driving system (300), and the driving system (300) is in transmission connection with the pulling rope (130) to control the length of the pulling rope (130).

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