CN111529984A - Self-air-supply type mask - Google Patents

Abstract

The invention provides a self-air-supply type mask, and belongs to the technical field of daily necessities. This from air feed formula gauze mask includes the frenulum of body and connection body, be connected with one between sliding sleeve and the valve barrel and hold the power spring, the valve barrel internal rotation is connected with a bull stick, the fixed impeller that is provided with in middle part of bull stick, the air outlet channel who rotates the chamber and connect the rotation chamber has in the valve barrel, air outlet channel communicates the external world, the inboard of rotation chamber and one-way ventilation skeleton, the impeller is located and rotates the intracavity, the both ends of bull stick have a gear respectively, have two racks that correspond with two gears respectively on the sliding sleeve inner wall, the gear that the rack toothing corresponds, the fixed protective framework that is provided with in outer end of sliding sleeve, the inboard of protective framework is provided with a corrugate filter cloth, form a chamber of keeping in between protective framework and the one-way ventilation skeleton, one-way ventilation framework allows gaseous inboard that gets into one. The invention has the advantages of reducing the air suction resistance and the like.

Description

A self-supplied mask

technical field

The invention belongs to the technical field of daily necessities, and relates to a self-supplied air mask.

Background technique

As a daily hygiene product for some people, masks are used to purify and isolate harmful substances such as particles or bacteria in the atmosphere. It is equivalent to setting a layer filter at the entrance and exit of the human respiratory tract. If the breathing resistance is increased, especially during vigorous exercise, due to the large inspiratory resistance and insufficient oxygen supply, it is easy to cause irreversible damage to the human heart and lung function.

In the prior art, through the setting of the breathing valve, the resistance of exhaled gas is greatly reduced, which can relieve the resistance of exhalation to a certain extent, but still cannot reduce the resistance during inhalation, and in fact, when wearing a mask, , the large inspiratory resistance and insufficient air supply are the main reasons for the damage to cardiopulmonary function. Therefore, the existing masks (including masks with exhalation breathing valves) cannot solve the problem of large inspiratory resistance. This is also based on The filtering effect of the mask is caused by the positive correspondence between the inhalation resistance and the inhalation resistance, that is, the two are contradictory.

When wearing a mask, especially when wearing a mask and exercising vigorously, the exhalation airflow expands the inner cavity of the mask, while the inhalation reduces the inner cavity space of the mask, causing the mask cloth to be close to the mouth and nose, further increasing the inhalation. resistance, aggravating the harm of masks to cardiopulmonary function.

SUMMARY OF THE INVENTION

The object of the present invention is to address the above-mentioned problems existing in the prior art, and to provide a self-ventilated mask, and the technical problem to be solved by the present invention is how to use the air pressure of exhalation to store the outside air during vigorous exercise, so that the Reduce inhalation resistance.

The object of the present invention can be achieved by the following technical solutions: a self-supply type mouth mask, it is characterized in that, this self-supply type mouth mask comprises a main body and a tie that connects the main body, and the middle part of the main body is provided with a circular pre-respirator. The pre-installed hole is connected with a one-way ventilation skeleton, a valve cylinder is fixedly arranged in the middle of the one-way ventilation skeleton, and a sliding sleeve located outside the one-way ventilation skeleton is slidably connected to the outside of the valve cylinder. A force accumulating spring is connected between the sliding sleeve and the valve cylinder, a rotating rod is rotatably connected in the valve cylinder, an impeller is fixedly arranged in the middle of the rotating rod, and the valve cylinder has a rotating cavity and an air outlet channel connecting the rotating cavity. , the air outlet channel communicates with the outside world, the rotating cavity and the inner side of the one-way ventilation skeleton, the impeller is located in the rotating cavity, the two ends of the rotating rod are respectively provided with a gear, and the inner wall of the sliding sleeve has two A rack corresponding to each gear, the rack meshes with the corresponding gear, and the airflow can drive the impeller to rotate when the airflow passes through the air outlet channel from the inner side of the one-way ventilation skeleton. The outer end of the sliding sleeve is fixedly provided with a shape-preserving skeleton, and the inner side of the shape-preserving skeleton is provided with a corrugated filter cloth, the filter cloth is cylindrical, and the filter cloth is connected between the shape-preserving skeleton and the one-way ventilation skeleton. A temporary storage cavity is formed between the shape-preserving frame and the one-way ventilation frame, and the one-way ventilation frame allows gas to enter the inner side of the one-way ventilation frame from the temporary storage chamber.

In the above-mentioned self-ventilated mask, the one-way ventilation skeleton includes a shaped sheet, and a plurality of fan-shaped ventilation holes are opened on the shaped sheet, and a baffle is arranged in the ventilation hole. One side is connected with the moulded sheet through an elastic sheet, and the other side of the blocking sheet can abut against the inner side of the moulded sheet.

In the above-mentioned self-supplied air mask, the shaped sheet is a convex spherical surface.

In the above-mentioned self-supplied mask, the outer end of the sliding sleeve has a retaining ring, and the accumulating force is connected between the retaining ring and the outer end of the valve cylinder.

In the above-mentioned self-supply type mask, the cross-sections of the sliding sleeve and the valve cylinder are all rectangular.

In the above-mentioned self-supplied mask, the force accumulating spring is a metal part, and the one-way ventilation skeleton, the shape-preserving skeleton, the valve cylinder, the gear, the rack, the impeller and the sliding sleeve are all plastic parts; The rotating rod is a metal part.

In the above-mentioned self-supplied air mask, the retaining ring has a resistance portion facing the air outlet direction of the air outlet channel.

Except for the valve cylinder, the shape-preserving skeleton and the one-way ventilation skeleton can be made into one-piece structures through plastic molds, respectively. The weakened area is located in the radial position of the profile. The rotating rod is a metal piece, which can provide a certain rotational inertia force, so that there is a delay in the process of switching the rotation direction of the impeller, so as to adapt to the breathing rhythm.

The blades on the impeller are arc-shaped, and the outer ends are oriented as follows: the outer ends of the blades located below the rotating rod face the side of the one-way ventilation frame, and the outer ends of the blades located above the rotating rod face the side of the shape-preserving frame, so that the exhaled The gas can act on the impeller in a good direction of force and drive the impeller to rotate; the body and the filter cloth are both multi-layer structures with filtering function, such as a filter structure with a non-woven layer and a sprayed filter layer.

As another option, the one-way ventilation skeleton with the one-way ventilation function can be a structure in which at least one through hole is opened on the sheet, and a one-way valve is arranged in the through hole, for example, a structure in the prior art is provided on the sheet. Mask breathing valve.

The principle of this mask is as follows: the body is fixed on the face of the human body by the tie, the body wraps the mouth and nose, and a certain space is formed between the body and the face, and the space is temporarily defined as the breathing space. The shutter on the ventilation frame closes the ventilation hole, and most of the exhaled gas enters the rotating cavity through the first half of the outlet channel, drives the impeller to rotate, and the exhaled gas is discharged out of the shape-preserving frame through the second half of the outlet channel. Due to the rotation of the impeller and the interaction between the gear and the rack, the sliding sleeve moves away from the valve cylinder to the outside, and stretches the accumulating spring to complete the exhalation action. Due to the increase of the temporary storage cavity space, the one-way ventilation skeleton limits the Since the airflow enters the temporary storage chamber from the breathing space, the expansion of the volume of the temporary storage chamber can only be realized by the outside air entering the temporary storage chamber after passing through the filter cloth. Therefore, the fresh air treated by the filter cloth enters the temporary storage chamber for storage; During the next inhalation process, the one-way ventilation skeleton is in a ventilating state, the gas in the temporary storage chamber can enter the breathing space, and is driven by the force-storing spring, the airflow from the temporary storage chamber into the breathing space has a certain pressure, so that the inhalation resistance is greatly weakened.

In order to increase the utilization of the expiratory airflow pressure, a resistance part is set on the baffle ring, and the resistance part is the shielding part on the baffle ring that extends toward the middle and can face the outlet of the air outlet, which is used to discharge the end of the air outlet. The air flow acts on the resistance part, that is, on the sliding sleeve, so that the sliding sleeve has a greater force during the outward movement of the valve cylinder.

Reasonable explanation: In this scheme, although the expiratory resistance is increased, and the expiratory pressure is required to drive the impeller to rotate, the rationality lies in the fact that during the breathing process, the inspiratory cross-section is restricted by the uncontrollable nostrils, and the inspiratory pressure increases. The controllable range is small, and when exhaling, the person can actively close the nasal cavity, and through the adjustment of the air outlet section of the mouth, the exhalation pressure is larger, so that the impeller can be driven to rotate. When it is fast, the exhalation volume is large, and the exhalation pressure can drive the accumulating spring to deform to different degrees, control the friction coefficient between the sliding sleeve and the valve cylinder to achieve the relative movement part, the relative movement resistance is small, and the corrugated filter The resistance of the cloth during the deformation process is extremely small, and the one-way ventilation skeleton guides and gathers the airflow, which can further reduce the waste of exhaled airflow. Furthermore, the expansion of the temporary storage cavity is started during the rotation of the impeller. Here, the exhalation pressure to realize the temporary storage of fresh air in the temporary storage chamber can be achieved by this solution. The specific applicable groups of masks, applicable occasions, and the breathability of the body and filter cloth are determined by factors.

The non-return of the air outlet channel: Since the distribution of the air outlet channel on both sides of the rotating cavity is in a dislocated state, that is, the two are distributed on the upper and lower sides of the rotating rod. After the left and right circles, it is discharged from the other section of the air outlet. When inhaling, under the action of the accumulating spring, gear and rack, the impeller must rotate in the opposite direction, and the outside air pressure is higher than the air pressure in the breathing space. When entering the rotating chamber, the airflow acting on the impeller is in a state of hindering the rotation of the impeller. On the one hand, the recovery speed of the accumulating spring is reduced to avoid the rapid shrinkage of the temporary storage chamber space, which causes the air in the temporary storage chamber to overflow from the filter cloth. On the one hand, it can alleviate the air pressure difference between the outside world and the breathing space, so that the air pressure difference between the two is relatively small. Under the relatively small air pressure difference, the unfiltered air from the outside has an outlet channel and there is very little airflow into the breathing space. , so that the impeller has a check effect on the outlet passage to a certain extent. Due to the different functions of the mask, if it is used for filtering bacteria, a one-way valve structure can be set at the end of the air outlet channel. If it is used for filtering particles, etc., this scheme can be used directly.

In addition, this solution has the following advantages:

The setting of the corrugated filter cloth can increase the ventilation area of the mask. As we all know, the larger inhalation resistance is affected by the resistance of the filter cloth per unit area on the one hand, and it is also affected by the overall filter area on the other hand. large, less resistance;

When inhaling, the shape-preserving skeleton and the one-way ventilation skeleton are close to each other, and the negative pressure of inhalation is small, which can prevent the filter cloth from fitting the face during the inhalation process of traditional masks, and reduce the increase in inhalation resistance caused by the effective filter area. At the same time, due to the setting of the one-way ventilation skeleton, the exhalation airflow can be aggregated and guided, and a relatively spacious space for the mouth and nose is also ensured.

When inhaling, it is mainly achieved through a bellows-shaped filter cloth, so that the gas source is on the outside of the mask, not directly in front of the face, avoiding the droplet concentration area when people communicate with each other, and improving the filtering effect in disguise.

Description of drawings

Fig. 1 is the structural representation of this mask.

FIG. 2 is an enlarged view of part A in FIG. 1 .

FIG. 3 is a cross-sectional view taken along the B-B direction in FIG. 2 .

FIG. 4 is a cross-sectional view taken along the C-C direction in FIG. 3 .

FIG. 5 is a schematic structural diagram of the blocking piece in the one-way ventilation frame.

In the figure, 1, body; 2, lace; 3, one-way ventilation frame; 31, profile; 32, baffle; 41, valve cylinder; 42, sliding sleeve; 43, accumulating spring; 44, rotating rod; 45, impeller; 46, air outlet; 47, gear; 48, rack; 49, shape-preserving frame; 5, filter cloth; 6, temporary storage cavity; 71, retaining ring;

Detailed ways

The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solutions of the present invention, but the present invention is not limited to these embodiments.

As shown in Figure 1, Figure 2, Figure 3 and Figure 4, the self-ventilated mask includes a body 1 and a strap 2 connecting the body 1. A circular pre-installation hole is provided in the middle of the body 1. A one-way ventilation frame 3 is connected, and a valve cylinder 41 is fixed in the middle of the one-way ventilation frame 3. The valve cylinder 41 is slidably connected with a sliding sleeve 42 located on the outside of the one-way ventilation frame 3. Between the sliding sleeve 42 and the valve cylinder 41 A force storage spring 43 is connected, a rotating rod 44 is rotatably connected in the valve cylinder 41, and an impeller 45 is fixedly arranged in the middle of the rotating rod 44. The valve cylinder 41 has a rotating cavity and an air outlet channel 46 connecting the rotating cavity, and the air outlet channel 46 communicates with the outside world. , the inner side of the rotating cavity and the one-way ventilation frame 3, the impeller 45 is located in the rotating cavity, the two ends of the rotating rod 44 are respectively provided with a gear 47, and the inner wall of the sliding sleeve 42 has two racks 48 corresponding to the two gears 47 respectively. , the rack 48 meshes with the corresponding gear 47, and the air flow can drive the impeller 45 to rotate when the airflow passes through the air outlet channel 46 from the inside of the one-way ventilation frame 3. A shape-preserving frame 49 is fixed at the outer end of the frame, and a corrugated filter cloth 5 is arranged on the inner side of the shape-preserving frame 49. The filter cloth 5 is cylindrical, and the filter cloth 5 is connected between the shape-preserving frame 49 and the one-way ventilation frame 3. A temporary storage cavity 6 is formed between the retaining frame 49 and the one-way ventilation frame 3, and the one-way ventilation frame 3 allows the gas to enter the inner side of the one-way ventilation frame 3 from the temporary storage chamber 6.

As shown in FIG. 2 and FIG. 5 , the one-way ventilation frame 3 includes a mold piece 31 . The mold piece 31 is provided with a number of fan-shaped ventilation holes. A baffle 32 is arranged in the ventilation hole, and one side of the baffle 32 passes through an elastic The sheet is connected with the moulding sheet 31 , and the other side of the blocking sheet 32 can abut against the inner side of the moulding sheet 31 .

The mold piece 31 is a convex spherical surface. The outer end of the sliding sleeve 42 is provided with a retaining ring 71 , and the accumulating force is connected between the retaining ring 71 and the outer end of the valve cylinder 41 . The retaining ring 71 has a resistance portion 72 facing the air outlet direction of the air outlet passage 46 .

The cross-sections of the sliding sleeve 42 and the valve cylinder 41 are both rectangular. The force accumulating spring 43 is a metal part, the one-way ventilation frame 3, the shape retaining frame 49, the valve cylinder 41, the gear 47, the rack 48, the impeller 45 and the sliding sleeve 42 are all plastic parts; the rotating rod 44 is a metal part.

Except for the valve cylinder 41, the shape-preserving frame 49 and the one-way ventilation frame 3 can be made into one-piece structures through plastic molds respectively. The weakened part is located at the radial position of the mold piece 31 . The rotating rod 44 is a metal piece, which can provide a certain rotational inertia force, so that there is a delay in the process of switching the rotation direction of the impeller 45 to adapt to the breathing rhythm.

The blades on the impeller 45 are arc-shaped, and the outer ends are oriented as follows: the outer ends of the blades located below the rotating rod 44 face the one-way ventilation frame 3, and the outer ends of the blades located above the rotating rod 44 face the shape-preserving frame 49- side, so that the exhaled gas can act on the impeller 45 in a better direction of force and drive the impeller 45 to rotate; the body 1 and the filter cloth 5 are both multi-layer structures with filtering functions, such as non-woven layers and spray wool The filter structure of the filter layer.

As another option, the one-way ventilation frame 3 with the one-way ventilation function may be a structure in which at least one through hole is opened on the sheet, and a one-way valve is arranged in the through hole, for example, a structure in the prior art is provided on the sheet. mask breathing valve.

The principle of the mask is as follows: the main body 1 is fixed on the face of the human body through the tie 2, the main body 1 wraps the mouth and nose, and forms a certain space with the face, and the space is temporarily defined as the breathing space. When exhaling, the breathing airflow The baffle 32 on the one-way ventilation frame 3 is driven to close the ventilation hole, and most of the exhaled gas enters the rotating cavity through the first half of the air outlet channel 46, and the impeller 45 is driven to rotate, and the exhaled gas is discharged through the second half of the air outlet channel 46 to keep the shape Outside the frame 49, at the same time, due to the rotation of the impeller 45, the interaction between the gear 47 and the rack 48 makes the sliding sleeve 42 move away from the valve cylinder 41 to the outside, and stretches the accumulating spring 43 to complete the exhalation action. The space of the temporary storage cavity 6 is enlarged, and the one-way ventilation frame 3 limits the airflow from the breathing space into the temporary storage cavity 6. The expansion of the volume of the temporary storage cavity 6 can only be caused by the outside air entering the temporary storage cavity 6 after passing through the filter cloth 5. In this way, the fresh air processed by the filter cloth 5 enters the temporary storage chamber 6 for storage; during the next inhalation process, the one-way ventilation frame 3 is in a ventilated state, and the gas in the temporary storage chamber 6 can enter In the breathing space, and driven by the force accumulating spring 43, the airflow entering the breathing space from the temporary storage cavity 6 has a certain pressure, which greatly weakens the inhalation resistance.

In order to increase the utilization of the expiratory airflow pressure, a resistance portion 72 is provided on the baffle ring 71 , and the resistance portion 72 is a shielding portion that extends toward the middle of the baffle ring 71 and can face the outlet of the air outlet channel 46 . The air flow discharged from the end of the air outlet channel 46 acts on the resistance portion 72 , that is, acts on the sliding sleeve 42 , so that the sliding sleeve 42 has a greater force in the process of moving outward relative to the valve cylinder 41 .

Reasonable explanation: In this solution, although the expiratory resistance is increased, and the expiratory pressure is required to drive the impeller 45 to rotate, the rationality lies in: during the breathing process, the inspiratory section is restricted by the uncontrollable nostrils, and the inspiratory pressure is The controllable range is small, and when exhaling, the person can actively close the nasal cavity, and through the adjustment of the air outlet section of the mouth, the exhalation pressure is larger, so that the impeller 45 can be driven to rotate, and the person is in the process of strenuous exercise or breathing. When the rhythm is fast, the exhalation volume is large, and the exhalation pressure can drive the force accumulating spring 43 to deform to different degrees, control the friction coefficient between the sliding sleeve 42 and the valve cylinder 41 to achieve the relative movement part, and the relative movement resistance is small. The corrugated filter cloth 5 has very little resistance during the deformation process, and the one-way ventilation skeleton 3 guides and gathers the airflow, which can further reduce the waste of exhaled airflow. The expansion of the temporary storage chamber 6, between this, the exhalation pressure to realize the temporary storage of fresh air in the temporary storage chamber 6 can be realized by this solution, the total amount of gas entering the temporary storage chamber 6 at a time, the stored force. The elastic coefficient of the spring 43, the size of the impeller 45, etc. need to be determined according to the specific applicable groups of the mask, the applicable occasion, the air permeability of the main body 1 and the filter cloth 5 and other factors.

Non-return of the air outlet channel 46: Since the distribution of the air outlet channel 46 on both sides of the rotating cavity is in a dislocated state, that is, the two are distributed on the upper and lower sides of the rotating rod 44, when exhaling, the air flow impacts the impeller 45 in a state that is conducive to the rotation of the impeller 45. , after the impeller 45 rotates for about half a turn, it is discharged from the other section of the air outlet channel 46, and when inhaling, under the action of the accumulating spring 43, the gear 47 and the rack 48, the impeller 45 must rotate in the opposite direction, and the external air pressure is higher than The air pressure in the breathing space, however, when the air flow enters the rotating cavity from the outside, the air flow acting on the impeller 45 is in a state of hindering the rotation of the impeller 45, on the one hand, the recovery speed of the accumulating spring 43 is reduced to avoid the temporary storage cavity 6 space The rapid shrinkage causes the air in the temporary storage cavity 6 to overflow from the filter cloth 5. On the other hand, the air pressure difference between the outside world and the breathing space can be alleviated, so that the air pressure difference between the two is relatively small. The air that has not been filtered from the outside has an air outlet passage 46 that has very little airflow into the breathing space, so that the impeller 45 has a check effect on the air outlet passage 46 to a certain extent. Due to the different functions of the mask, if it is used for filtering bacteria, a one-way valve structure can be set at the end of the air outlet channel 46. If it is used for filtering particles, this scheme can be directly adopted.

The specific embodiments described herein are merely illustrative of the spirit of the invention. Those skilled in the art to which the present invention pertains can make various modifications or additions to the described specific embodiments or substitute in similar manners, but will not deviate from the spirit of the present invention or go beyond the definitions of the appended claims range.

Claims (7)

1. a self-supply type mouth mask, is characterized in that, this self-supply type mouth mask comprises main body (1) and the tie (2) connecting main body (1), the middle part of described main body (1) is provided with a circular There is a one-way ventilation frame (3) connected to the pre-installation hole, and a valve cylinder (41) is fixedly arranged in the middle of the one-way ventilation frame (3), and the valve cylinder (41) slides outside. A sliding sleeve (42) located on the outer side of the one-way ventilation frame (3) is connected, a force accumulating spring (43) is connected between the sliding sleeve (42) and the valve cylinder (41), and the valve cylinder (41) A rotating rod (44) is rotatably connected, and an impeller (45) is fixedly arranged in the middle of the rotating rod (44). The air outlet channel (46) communicates with the outside, the rotating cavity and the inner side of the one-way ventilation skeleton (3), the impeller (45) is located in the rotating cavity, and the two ends of the rotating rod (44) are respectively provided with a gear (47), The inner wall of the sliding sleeve (42) is provided with two racks (48) respectively corresponding to the two gears (47), the racks (48) mesh with the corresponding gears (47), and the air flow is provided by the one-way ventilation skeleton ( 3) When the inner side passes through the air outlet channel (46), the impeller (45) can be driven to rotate, and the air outlet channels (46) on both sides of the rotating cavity are located on both sides of the rotating rod (44) respectively, and the outer end of the sliding sleeve (42) A shape-preserving frame (49) is fixedly arranged, and a corrugated filter cloth (5) is arranged on the inner side of the shape-preserving frame (49), the filter cloth (5) is cylindrical, and the filter cloth (5) is connected Between the shape-preserving frame (49) and the one-way ventilation frame (3); a temporary storage cavity (6) is formed between the shape-preserving frame (49) and the one-way ventilation frame (3), the one-way ventilation The frame (3) allows gas to enter the inner side of the one-way ventilation frame (3) from the temporary storage chamber (6). 2. A kind of self-ventilated mouth mask according to claim 1, is characterized in that, described one-way ventilation skeleton (3) comprises a type sheet (31), and described mould sheet (31) is provided with some fan-shaped A ventilation hole, a blocking piece (32) is arranged in the ventilation hole, one side of the blocking piece (32) is connected with the mold piece (31) through an elastic piece, and the other side of the blocking piece (32) can be Abut against the inner side of the profile (31). 3. A kind of self-supply type mouth mask according to claim 2, is characterized in that, described moulding sheet (31) is convex spherical surface. 4. A self-supplied air mask according to claim 1, 2 or 3, characterized in that the outer end of the sliding sleeve (42) has a retaining ring (71), and the accumulating force is connected to the retaining ring (71) and the outer end of the valve cylinder (41). 5. A kind of self-supply type mouth mask according to claim 1, 2 or 3, characterized in that, the cross-sections of the sliding sleeve (42) and the valve cylinder (41) are all rectangular. 6. according to a kind of self-supply type mouth mask of claim 1 or 2 or 3, it is characterized in that, described force accumulating spring (43) is metal piece, described one-way ventilation skeleton (3), shape-preserving skeleton ( 49), the valve cylinder (41), the gear (47), the rack (48), the impeller (45) and the sliding sleeve (42) are all plastic parts; the rotating rod (44) is a metal part. 7 . The self-supplied air mask according to claim 4 , wherein the retaining ring ( 71 ) has a resistance portion ( 72 ) facing the air outlet direction of the air outlet passage ( 46 ). 8 .

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