CN211752269U - Respiratory muscle strength training equipment for airflow impedance - Google Patents
Respiratory muscle strength training equipment for airflow impedance Download PDFInfo
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- CN211752269U CN211752269U CN202020206402.8U CN202020206402U CN211752269U CN 211752269 U CN211752269 U CN 211752269U CN 202020206402 U CN202020206402 U CN 202020206402U CN 211752269 U CN211752269 U CN 211752269U
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- air suction
- airflow
- expiration
- exhalation
- holes
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- 238000012549 training Methods 0.000 title claims abstract description 73
- 210000003019 respiratory muscle Anatomy 0.000 title claims abstract description 44
- 230000029058 respiratory gaseous exchange Effects 0.000 claims abstract description 52
- 239000002313 adhesive film Substances 0.000 claims description 6
- 210000003205 muscle Anatomy 0.000 abstract description 3
- 230000000241 respiratory effect Effects 0.000 description 8
- 230000000694 effects Effects 0.000 description 6
- 239000012528 membrane Substances 0.000 description 6
- 238000013461 design Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 230000002238 attenuated effect Effects 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 230000003434 inspiratory effect Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000004202 respiratory function Effects 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 230000007306 turnover Effects 0.000 description 2
- 206010002091 Anaesthesia Diseases 0.000 description 1
- 208000006545 Chronic Obstructive Pulmonary Disease Diseases 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000037005 anaesthesia Effects 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000005399 mechanical ventilation Methods 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 208000024891 symptom Diseases 0.000 description 1
- 230000003313 weakening effect Effects 0.000 description 1
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- Measurement Of The Respiration, Hearing Ability, Form, And Blood Characteristics Of Living Organisms (AREA)
Abstract
The utility model relates to a breathe training equipment technical field, especially relate to an air current impedance's breathing muscle strength training equipment, include: the air flow cavity is provided with an opening at the top, and an air suction unit and an air expiration unit are respectively arranged on two sides of the air flow cavity; the air suction unit is rotatably connected with the airflow cavity, at least 2 air suction holes are formed in the air suction unit, and air suction through holes corresponding to the air suction holes are formed in the airflow cavity; the exhalation unit is rotatably connected with the airflow cavity, at least 2 exhalation holes are formed in the exhalation unit, and exhalation through holes corresponding to the exhalation holes are formed in the airflow cavity; a breathing passage is connected with the top of the airflow cavity; the breathing nozzle is connected with the breathing channel. The utility model provides a respiratory muscle strength training equipment does not have corresponding problem among the prior art. The training equipment can realize the respiratory muscle strength training compatibility of normal people, patients, athletes and blind people, and enables the training object to be more matched with the training result.
Description
Technical Field
The utility model relates to a breathe training equipment technical field, especially relate to an air current impedance's breathing muscle strength training equipment.
Background
Aiming at the gradually increasing chronic obstructive pulmonary disease of sick people, the respiratory weakening after operation, anesthesia or mechanical ventilation and the respiratory function decline of old people, a plurality of devices for improving the respiratory training appear on the market. For example, the three-ball breathing equipment, the breathing muscle training equipment and the like have certain effects on relieving symptoms such as respiratory attenuation, respiratory function decline and the like. However, these devices for promoting respiratory training have the problems of high selling price, inconvenient use, inconvenient carrying and limited people for which the design is aimed. The existing equipment for improving breathing training is not suitable for the prevention training of normal healthy people and the training of special crowds such as athletes, blind people and the like, and the subdivision control of different crowds is not performed on the design of airflow impedance, so that the impedance of an object and the equipment has no pertinence, and the training mode is incorrect.
SUMMERY OF THE UTILITY MODEL
In view of the above-mentioned shortcomings of the prior art, an object of the present invention is to provide an airflow impedance respiratory muscle training device for solving the problem that the respiratory muscle training of normal persons, patients, athletes and blind persons in the prior art is not targeted. The utility model discloses a respiratory muscle training equipment can realize that normal person, patient, sportsman and blind person's respiratory muscle training is compatible, lets training object and training result more match, can improve the training effect, can be compatible more use crowd again.
In order to achieve the above objects and other related objects, the present invention provides an air flow resistance respiratory muscle strength training apparatus, which is characterized in that the respiratory muscle strength training apparatus comprises:
the air flow cavity is a groove body with an opening at the top, and an air suction unit and an air expiration unit are respectively arranged on two sides of the air flow cavity; the air suction unit is rotatably connected with the airflow cavity, at least 2 air suction holes are formed in the air suction unit, and air suction through holes corresponding to the air suction holes are formed in the airflow cavity; the exhalation unit is rotatably connected with the airflow cavity, at least 2 exhalation holes are formed in the exhalation unit, and exhalation through holes corresponding to the exhalation holes are formed in the airflow cavity;
a breathing passage connected to a top of the airflow chamber;
the breath nozzle is connected with the breath channel.
Above-mentioned respiratory muscle strength training equipment realizes the air current business turn over through inhaling the unit and exhaling the unit, and the unit of breathing in is provided with different gears, inhales the through-hole intercommunication of breathing in on different inspiratory holes of unit control and the air current chamber through the rotation, exhales the unit and designs with the same principle for the user has the different pressure of breathing in, thereby can be to different training. Above-mentioned respiratory muscle training equipment can realize that normal people, patient, sportsman and blind person's respiratory muscle training is compatible, lets training object and training result more match, can improve the training effect, can be compatible more use crowd again.
The breathing nozzle is made of medical PC materials, the conventional specifications of the breathing nozzle comprise 22mm x15mm specification, 24mm x15mm specification and 26mm x15mm specification, the three specifications can be compatible with a breathing channel, a handle does not need to be replaced, and the breathing nozzle is replaced according to the actual mouth shape.
The airflow dead zone, namely an internal cavity formed by communicating the airflow cavity with the breathing channel, has no special requirement on the shape and has the requirement on the space size of the airflow dead zone. The outer part of the airflow cavity is generally circular, and a rectangle of 25mmx45mm is adopted as the airflow space inside the airflow cavity. Therefore, the breath test is convenient, and the problem that the air flow space is insufficient to cause abnormal test is solved.
In an embodiment of the present invention, the air suction unit includes an air suction disc and an air suction knob which are integrally connected, the air suction disc is provided with an air suction hole, and the air suction disc is rotatably connected to the airflow cavity; the expiration unit comprises an expiration disc and an expiration knob which are clamped into a whole, an expiration hole is formed in the expiration disc, and the expiration disc is rotatably connected with the airflow cavity.
In an embodiment of the present invention, the air suction knob is provided with air suction gear identification protrusions, and the number of the air suction holes is the same as the number of the air suction gear identification protrusions; the expiration knob is provided with expiration gear identification bulges, and the number of expiration holes is the same as that of the expiration gear identification bulges.
In an embodiment of the present invention, the middle groove of the air suction disc is provided with an air suction hole; an expiration hole is formed in the groove in the middle of the expiration plate; a first connecting shaft is arranged on a groove in the middle of the air suction disc, and the other end of the first connecting shaft is connected with an air suction adhesive film; and a second connecting shaft is arranged on a groove in the middle of the expiration plate, and the other end of the second connecting shaft is connected with an expiration adhesive film.
Can prevent dust through set up suction opening and exhaling the hole in the recess, breathe in glued membrane and exhale the glued membrane and also can prevent dust, gas reentries the suction opening through the clearance of glued membrane with the casing.
In an embodiment of the present invention, the number of the air suction holes is 5, and the aperture of the air suction holes is 1.9-2.0 mm, 2.4-2.5 mm, 3.3-3.4 mm, 3.85-3.95 mm, 4.65-4.75 mm in sequence; the number of the expiration holes is 5, and the aperture of the expiration holes is 1.7-1.9 mm, 2.2-2.4 mm, 3.0-3.2 mm, 3.7-3.9 mm and 5.5-5.7 mm in sequence.
Each inhalation unit and each exhalation unit respectively correspond to 5 inhalation holes and exhalation holes with different sizes. By rotating the inspiration unit and the expiration unit, the opening and closing size of each inspiration hole and each expiration hole can be controlled. Because the inhalation hole and the exhalation hole share the middle airflow dead zone (namely, the airflow cavity and the internal cavity formed by the communication of the breathing channel), 50 different opening and closing combinations are formed. The air flow impedance can be realized to-50 cmH2O (minimum suction hole) to 50cmH2The respiratory pressure decay of O (minimum exhalation vent) and the human respiratory range is-350 cmH2O～350cmH2O, after attenuation, can still reach-300 cmH2O to 300cmH2The range of O, just meets all needs from athletes to patients.
In an embodiment of the present invention, the diameter of the air suction holes is 1.95mm, 2.45mm, 3.35mm, 3.92mm, 4.72mm in sequence; the aperture of the exhalation vent is 1.8mm, 2.3mm, 3.1mm, 3.8mm and 5.6mm in sequence.
When the air flow impedance is-50 cmH2And when the air suction resistance is larger than the air suction resistance, the maximum gear is used in an air suction gear, and the aperture of the air suction hole is the smallest and is 1.95 mm. Because the respiratory muscle strength training equipment is arranged at the air suction endCan realize the maximum-50 cmH2O, when the air suction hole is at the highest gear and the aperture of the air suction hole is minimum, the air is sucked through the breathing nozzle, and the air suction resistance is-50 cmH2The air flow of O is attenuated, so that the maximum air flow pressure sucked to the mouth side is-350- (-50) — 300cmH2O。
When the airflow impedance is 50cmH2And when the diameter of the air inlet is larger than the diameter of the air outlet, the exhalation resistance is the largest, the exhalation gear is the highest, and the aperture of the exhalation hole is the smallest and is 1.8 mm. Similarly, 50cmH through the exhalation vent2The air flow of the oxygen is attenuated, and the maximum air pressure from the minimum exhalation hole is 350-50-300 cmH2O。
If the inhalation gear and the exhalation gear are both set to the highest gear, 50cmH can be simultaneously realized2Inspiratory resistance of O and 50cmH2Exhalation resistance of O.
In an embodiment of the present invention, the breathing passage is provided with a braille zone. The Braille region is provided with Braille, and the Braille on the breathing passage can enable the blind to smoothly complete training.
In an embodiment of the present invention, the breathing passage and the airflow chamber are integrally formed, and the breathing nozzle and the breathing passage are detachably connected.
As mentioned above, the utility model discloses an air current impedance's respiratory muscle strength training equipment has following beneficial effect: above-mentioned respiratory muscle strength training equipment realizes the air current business turn over through inhaling the unit and exhaling the unit, and the unit of breathing in is provided with different gears, inhales the through-hole intercommunication of breathing in on different inspiratory holes of unit control and the air current chamber through the rotation, exhales the unit and designs with the same principle for the user has the different pressure of breathing in, thereby can be to different training. Above-mentioned respiratory muscle training equipment can realize that normal people, patient, sportsman and blind person's respiratory muscle training is compatible, lets training object and training result more match, can improve the training effect, can be compatible more use crowd again.
Drawings
Fig. 1 is a schematic perspective view of a respiratory muscle training apparatus with airflow impedance according to an embodiment of the present invention.
Fig. 2 is a front view of a respiratory muscle training apparatus with air flow impedance according to an embodiment of the present invention.
Fig. 3 is a top view of a respiratory muscle training apparatus with air flow impedance according to an embodiment of the present invention.
Fig. 4 shows an exploded view of a respiratory muscle training apparatus with air flow impedance according to an embodiment of the present invention.
Fig. 5 is an enlarged schematic view of a point a in fig. 4 according to an embodiment of the present invention.
Fig. 6 shows an exploded view of a respiratory muscle training apparatus with airflow impedance according to an embodiment of the present invention.
Fig. 7 is a perspective view of the suction unit of the respiratory muscle training apparatus with airflow impedance according to the embodiment of the present invention, which is provided with a suction rubber film.
Fig. 8 is a front view of the suction unit of the respiratory muscle training apparatus with airflow impedance according to an embodiment of the present invention, which is provided with a suction rubber film.
Fig. 9 is a rear view of the breathing unit of the respiratory muscle training apparatus with airflow impedance according to the embodiment of the present invention, which is provided with a breathing adhesive film.
Fig. 10 is an exploded view of the expiratory rubber membrane mounted on the expiratory unit of the respiratory muscle training apparatus with airflow impedance according to the embodiment of the present invention.
Fig. 11 is a perspective view of an embodiment of the present invention, in which no expiratory film is installed on the expiratory unit of the respiratory muscle training apparatus with airflow impedance.
Fig. 12 is a front view of the breathing unit of the respiratory muscle training apparatus with airflow resistance without installing the breathing membrane according to the embodiment of the present invention.
Fig. 13 is a rear view of the breathing unit of the respiratory muscle training apparatus with airflow resistance without the installed breathing membrane according to the embodiment of the present invention.
Fig. 14 is a front view of an expiratory film mounted on an expiratory unit of an air flow impedance respiratory muscle training apparatus according to an embodiment of the present invention.
Fig. 15 is a cross-sectional view of an airflow dead zone of an airflow impedance respiratory muscle training apparatus according to an embodiment of the present invention.
Description of the element reference numerals
1-airflow cavity, 101-expiration through hole; 2-an air suction unit, 201-an air suction disc, 202-an air suction knob, 203-an air suction hole, 204-an air suction adhesive film, 205-a first connecting shaft and 206-an air suction gear identification bulge; 3-expiration unit, 301-expiration disc, 302-expiration knob, 303-expiration hole, 304-expiration rubber film, 305-second connecting shaft and 306-expiration gear identification protrusion; 4-a breathing channel; 5-Braille region; 6-expiration nozzle.
Detailed Description
The following description is provided for illustrative purposes, and other advantages and features of the present invention will become apparent to those skilled in the art from the following detailed description.
Please refer to fig. 1 to 14. It should be understood that the structure, ratio, size and the like shown in the drawings attached to the present specification are only used for matching with the content disclosed in the specification, so as to be known and read by those skilled in the art, and are not used for limiting the limit conditions that the present invention can be implemented, so that the present invention has no technical essential meaning, and any structure modification, ratio relationship change or size adjustment should still fall within the scope that the technical content disclosed in the present invention can cover without affecting the function that the present invention can produce and the purpose that the present invention can achieve. Meanwhile, the terms such as "upper", "lower", "left", "right", "middle" and "one" used in the present specification are for convenience of description, and are not intended to limit the scope of the present invention, and changes or adjustments of the relative relationship thereof may be made without substantial technical changes, and the present invention is also regarded as the scope of the present invention.
Referring to fig. 1 and 2, the present invention provides an airflow impedance respiratory muscle strength training device, which includes:
referring to fig. 4, an airflow chamber 1, wherein the airflow chamber 1 is a tank body with an open top, and referring to fig. 3, an inhalation unit 2 and an exhalation unit 3 are respectively installed at two sides of the airflow chamber 1;
referring to fig. 4 and 6, the air suction unit 2 includes an air suction disc 201 and an air suction knob 202 which are clamped together, referring to fig. 9, an air suction hole 203 is formed in a groove in the middle of the air suction disc 201, and the air suction disc 201 is rotatably connected to the airflow chamber 1; an air suction through hole corresponding to the air suction hole 203 is formed in the airflow cavity 1, the exhalation through hole 101 is marked in fig. 5, the air suction through hole is the same as the exhalation through hole 101 and is symmetrically arranged on two sides, and therefore the air suction through hole is not marked in the drawing; referring to fig. 7 to 9, a first connecting shaft 205 is disposed on a groove in the middle of the suction plate 201, and the other end of the first connecting shaft 205 is connected to the suction adhesive film 204; the air suction knob 202 is provided with air suction gear identification protrusions 206, and the number of the air suction holes 203 is the same as that of the air suction gear identification protrusions 206; the number of the air suction holes 203 is 5, and the aperture of each air suction hole 203 is 1.95mm, 2.45mm, 3.35mm, 3.92mm and 4.72mm in sequence;
referring to fig. 4, 6 and 10, the exhalation unit 3 includes an exhalation disk 301 and an exhalation knob 302 which are clamped together, referring to fig. 11 to 13, an exhalation hole 303 is formed in a groove in the middle of the exhalation disk 301, and the exhalation disk 301 is rotatably connected to the airflow chamber 1; referring to the figure, the airflow chamber 1 is provided with an exhalation through hole 101 corresponding to the exhalation hole 303; please refer to fig. 14, a second connecting shaft 305 is disposed on a middle groove of the exhalation disk 301, and the other end of the second connecting shaft 305 is connected to an exhalation film 304; the expiratory knob 302 is provided with expiratory gear identification bulges 306, and the number of the expiratory holes 303 is the same as that of the expiratory gear identification bulges 306; the number of the exhalation vents 303 is 5, and the aperture of the exhalation vents 303 is 1.8mm, 2.3mm, 3.1mm, 3.8mm and 5.6mm in sequence;
a breathing passage 4, the breathing passage 4 being integrally formed with the top of the airflow chamber 1; a Braille region 5 is arranged on the breathing channel 4;
the breathing nozzle 6 is detachably connected with the breathing channel 4.
The breathing nozzle 6 is made of medical PC materials in the using process, the specification of 22mm x15mm, the specification of 24mm x15mm and the specification of 26mm x15mm are provided conventionally, the three types of the breathing nozzle can be compatible with the breathing channel 4, the handle does not need to be replaced, and the breathing nozzle 6 is replaced according to the actual mouth shape. Each inhalation unit 2 and exhalation unit 3 corresponds to 5 inhalation ports 203 and exhalation ports 303 of different sizes, respectively. By rotating the inhalation unit 2 and the exhalation unit 3, the opening and closing and the opening and closing of each of the inhalation holes 203 and the exhalation holes 303 can be controlled. The control process of the air suction unit 2 is as follows: the air suction knob 202 is rotated to drive the air suction disc 201 to rotate, and the air suction holes 203 with different apertures and the air suction through holes form different opening and closing states in the rotating process of the air suction disc 201; the control process of the exhalation unit 3 is the same.
Referring to fig. 15, inhalation ports 203 and exhalation ports 303 share a central air flow dead space, that is, an internal cavity formed by communicating air flow chamber 1 and breathing passage 4, so that 50 different opening and closing combinations are formed. The air flow impedance can be realized to-50 cmH2O is the minimum suction hole 203 to 50cmH2O is the respiratory pressure decay of the minimum exhalation vent 303, and the human respiratory range is-350 cmH2O～350cmH2O, after attenuation, can still reach-300 cmH2O to 300cmH2The range of O, just meets all needs from athletes to patients.
To sum up, the utility model discloses respiratory muscle training equipment can realize that normal person, patient, sportsman and blind person's respiratory muscle training is compatible, lets training object and training result more match, can improve the training effect, can be compatible more use crowd again. Therefore, the utility model effectively overcomes various defects in the prior art and has high industrial utilization value.
The above embodiments are merely illustrative of the principles and effects of the present invention, and are not to be construed as limiting the invention. Modifications and variations can be made to the above-described embodiments by those skilled in the art without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which may be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.
Claims (9)
1. An airflow resistive respiratory muscle training apparatus, comprising:
the air flow device comprises an air flow cavity (1), wherein the air flow cavity (1) is a groove body with an opening at the top, and an air suction unit (2) and an air expiration unit (3) are respectively installed on two sides of the air flow cavity (1); the air suction unit (2) is rotatably connected with the airflow cavity (1), at least 2 air suction holes (203) are formed in the air suction unit (2), and air suction through holes corresponding to the air suction holes (203) are formed in the airflow cavity (1); the exhalation unit (3) is rotatably connected with the airflow cavity (1), at least 2 exhalation holes (303) are formed in the exhalation unit (3), and exhalation through holes (101) corresponding to the exhalation holes (303) are formed in the airflow cavity (1);
a breathing passage (4), the breathing passage (4) being connected with the top of the airflow chamber (1);
the breathing nozzle (6), the breathing nozzle (6) with breathe the passageway (4) and be connected.
2. An airflow resistive respiratory muscle training apparatus according to claim 1, wherein: the air suction unit (2) comprises an air suction disc (201) and an air suction knob (202) which are clamped into a whole, an air suction hole (203) is formed in the air suction disc (201), and the air suction disc (201) is rotatably connected with the airflow cavity (1); the expiration unit (3) comprises an expiration disc (301) and an expiration knob (302) which are clamped into a whole, an expiration hole (303) is formed in the expiration disc (301), and the expiration disc (301) is rotatably connected with the airflow cavity (1).
3. An airflow resistive respiratory muscle training apparatus according to claim 2, wherein: the air suction knob (202) is provided with air suction gear identification bulges (206), and the number of the air suction holes (203) is the same as that of the air suction gear identification bulges (206); the expiration knob (302) is provided with expiration gear identification bulges (306), and the number of the expiration holes (303) is the same as that of the expiration gear identification bulges (306).
4. An airflow resistive respiratory muscle training apparatus according to claim 2, wherein: a middle groove of the air suction disc (201) is provided with an air suction hole (203); an exhalation hole (303) is arranged on the groove in the middle of the exhalation disk (301).
5. An airflow resistive respiratory muscle training apparatus according to claim 4, wherein: the number of the air suction holes (203) is 5, and the aperture of each air suction hole (203) is 1.9-2.0 mm, 2.4-2.5 mm, 3.3-3.4 mm, 3.85-3.95 mm and 4.65-4.75 mm in sequence; the number of the expiration holes (303) is 5, and the aperture of the expiration holes (303) is 1.7-1.9 mm, 2.2-2.4 mm, 3.0-3.2 mm, 3.7-3.9 mm and 5.5-5.7 mm in sequence.
6. An airflow resistive respiratory muscle training apparatus according to claim 5, wherein: the aperture of the air suction hole (203) is 1.95mm, 2.45mm, 3.35mm, 3.92mm and 4.72mm in sequence; the diameter of the exhalation vent (303) is 1.8mm, 2.3mm, 3.1mm, 3.8mm and 5.6mm in sequence.
7. An airflow resistive respiratory muscle training apparatus according to claim 2 or 4, wherein: a first connecting shaft (205) is arranged on a groove in the middle of the air suction disc (201), and the other end of the first connecting shaft (205) is connected with an air suction adhesive film (204); a second connecting shaft (305) is arranged on a groove in the middle of the expiration plate (301), and the other end of the second connecting shaft (305) is connected with an expiration rubber film (304).
8. An airflow resistive respiratory muscle training apparatus according to claim 1, wherein: the breathing passage (4) is provided with a Braille region (5).
9. An airflow resistive respiratory muscle training apparatus according to claim 1, wherein: the breathing channel (4) and the airflow cavity (1) are integrally formed, and the breathing nozzle (6) is detachably connected with the breathing channel (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020206402.8U CN211752269U (en) | 2020-02-25 | 2020-02-25 | Respiratory muscle strength training equipment for airflow impedance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020206402.8U CN211752269U (en) | 2020-02-25 | 2020-02-25 | Respiratory muscle strength training equipment for airflow impedance |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211752269U true CN211752269U (en) | 2020-10-27 |
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ID=72911075
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020206402.8U Expired - Fee Related CN211752269U (en) | 2020-02-25 | 2020-02-25 | Respiratory muscle strength training equipment for airflow impedance |
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| Country | Link |
|---|---|
| CN (1) | CN211752269U (en) |
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2020
- 2020-02-25 CN CN202020206402.8U patent/CN211752269U/en not_active Expired - Fee Related
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