Simple breathing machine convenient to control

Abstract

The utility model relates to a simple breathing machine convenient to control, which comprises an air storage part, a breathing mask and an air guide pipe, an air inlet valve used for air inlet and a pressure valve used for air outlet are arranged on two sides of the air storage part, and the breathing mask is communicated with the pressure valve through the air guide pipe. A pressurizing mechanism for compressing air in the air storage part is arranged on the air storage part; the pressurizing mechanism comprises a compression cylinder fixedly connected to the air storage part and a piston slidably connected to the interior of the compression cylinder, the interior of the compression cylinder is communicated with the interior of the air storage part, the piston is tightly attached to the inner wall of the compression cylinder, and a transmission mechanism for pushing the piston to reciprocate in the compression cylinder is arranged on the piston; the breathing machine is used for solving the problems that in the prior art, the extrusion degree of a simple breathing machine on an air bag is difficult to control, a patient is inconvenient to stably assist in breathing, the tidal volume of breathing of the patient is too large or too small, and the risk of further hurting the patient exists.

Description

Technical Field

[0001] The utility model relates to the technical field of medical equipment, in particular to a simple ventilator which is easy to control. Background Art

[0002] A ventilator is a device that can be used to replace, control or change a person's normal physiological breathing, increase lung ventilation, improve respiratory function, and save heart reserve capacity; tidal volume refers to the amount of air inhaled or exhaled each time during calm breathing. The tidal volume setting is not constant and should be adjusted according to the patient's actual situation.

[0003] However, the existing simple ventilator is realized by squeezing the airbag manually. According to relevant operating specifications, there are requirements for the frequency of squeezing the airbag manually and the degree of squeezing the airbag, and a certain speed needs to be maintained, which places high demands on the operator. When used for a long time, the operator's hands become weak and tired due to frequent squeezing of the airbag, so that the degree of squeezing of the airbag is difficult to meet the standard requirements, resulting in the patient's breathing tidal volume being too large or too small, and there is a risk of further harm to the patient. Utility Model Content

[0004] In view of this, the purpose of the utility model is to provide a simple ventilator that is easy to control, so as to solve the problem that the simple ventilator in the prior art is difficult to control the degree of squeezing of the air bag, which is not convenient for stably assisting the patient's breathing, causing the patient's breathing tidal volume to be too large or too small, and there is a risk of further harming the patient.

[0005] The utility model is realized by the following technical solutions:

[0006] A simple respirator that is easy to control, comprising an air storage unit, a breathing mask and an air duct, wherein an air inlet valve for air intake and a pressure valve for air discharge are arranged on both sides of the air storage unit, the breathing mask is connected to the pressure valve through the air duct, and a pressurizing mechanism for compressing the air inside the air storage unit is arranged on the air storage unit;

[0007] The pressurizing mechanism includes a compression cylinder fixedly connected to the air storage part and a piston slidably connected to the inside of the compression cylinder. The interior of the compression cylinder is connected to the interior of the air storage part. The piston fits tightly against the inner wall of the compression cylinder, and a transmission mechanism is provided on the piston to push the piston to reciprocate in the compression cylinder.

[0008] Furthermore, the transmission mechanism includes a slide rod and a sector gear fixedly connected to the piston, the upper end of the slide rod is slidably connected to the compression cylinder, a rack meshing with the sector gear is provided on the side wall of the slide rod, and the rack is parallel to the length direction of the slide rod;

[0009] The sector gear is located inside the compression cylinder and is rotationally connected to the compression cylinder.

[0010] Furthermore, the curved surface on the outer side of the sector gear includes a toothed surface with fixed gear teeth and a smooth circular surface, and an annular groove coaxial with the sector gear is provided on the rear plane of the sector gear;

[0011] A portion of the outer circular surface of the annular groove corresponding to the smooth circular surface is provided with a plurality of sliding holes evenly distributed along the circumferential direction of the smooth circular surface, and the sliding holes vertically penetrate the smooth circular surface, and movable gear teeth are slidably connected in the sliding holes, and the gear parameters of the movable gear teeth are completely the same as those of the fixed gear teeth;

[0012] An elastic member for pulling the movable gear teeth into the sliding hole is provided in the sliding hole, and the movable gear teeth are retracted into the sliding hole when the elastic member is in a naturally stretched state, and the bottom of the movable gear teeth abuts against the inner circular surface of the annular groove, and an adjustment mechanism for pushing the movable gear teeth to extend out of the sliding hole is provided below the movable gear teeth.

[0013] Furthermore, the adjustment mechanism includes an arc-shaped push rod for pushing the movable gear teeth to extend out of the slide hole and an annular slide rail fixedly mounted on the bottom plane of the annular groove;

[0014] The arc push rod is fixedly connected to the movable end of the annular slide rail, and the end of the arc push rod is a wedge-shaped structure extending forward along the inner circular surface of the annular groove, and the bottom of the movable gear tooth is a ball head shape.

[0015] Furthermore, a second spring for driving the movable gear teeth to contract is provided on the side wall of the sliding hole, and two ends of the second spring are fixedly connected to the sliding hole and the movable gear teeth respectively.

[0016] Furthermore, a baffle is fixedly connected inside the compression cylinder between the sector gear and the piston, and the air on the upper and lower sides of the baffle is connected, and the upper part of the slide rod is slidably connected to the baffle in a single degree of freedom along the length direction.

[0017] Furthermore, a first spring for driving the piston to return to its original position is sleeved on the slide rod, and two ends of the first spring are fixedly connected to the piston and the baffle respectively.

[0018] Furthermore, a rotating shaft is fixedly connected to the sector gear, a front end of the rotating shaft penetrates the front side wall of the compression cylinder and extends outside the compression cylinder, and the rotating shaft is rotationally connected to the compression cylinder, and a driving part that drives the sector gear to rotate is connected to the front end of the rotating shaft.

[0019] Furthermore, the driving part is a "Z-shaped" lever, and one end of the lever is fixedly connected to the front end of the rotating shaft.

[0020] Furthermore, the adjustment mechanism also includes a shift ring that passes through the rear wall of the compression cylinder and is inserted into the outside of the compression cylinder, and an "L-shaped" connecting rod arranged inside the compression cylinder. The shift ring is rotatably connected to the compression cylinder, and the shift ring is coaxial with the fan gear. The two ends of the connecting rod are respectively fixedly connected to the shift ring and the arc-shaped push rod.

[0021] The beneficial effects of the utility model are:

[0022] The simple ventilator with adjustable tidal volume forms a closed chamber of the air storage part by means of a compression cylinder, a piston, an air inlet valve and a pressure valve arranged on the air storage part. The volume of the air inside the air storage part can be compressed by controlling the piston to slide downward. Under the action of the pressure difference between the air storage part and the breathing mask, the air in the air storage part flows out from the pressure valve through the air guide tube and enters the breathing mask to assist the patient to inhale. The piston is driven to reciprocate in the compression cylinder by a transmission mechanism, so that the piston slides downward the same distance each time, and the volume of the air compressed inside the air storage part is constant each time, resulting in an equal amount of air delivered to the breathing mask each time, so that the tidal volume of each breath of the patient is relatively stable, thereby avoiding physical damage to the patient due to excessive changes in tidal volume.

[0023] Other advantages, objectives and features of the present invention will be described in the following description to some extent, and will be apparent to those skilled in the art based on the following examination and research, or can be taught from the practice of the present invention to some extent. The objectives and other advantages of the present invention can be achieved and obtained through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;

[0025] Figure 2 It is a top view of the utility model;

[0026] Figure 3 For the utility model Figure 2 Partial cross-sectional view of AA;

[0027] Figure 4 It is a cross-sectional view of the sector gear of the utility model;

[0028] Figure 5 For the utility model Figure 4 Cross-sectional view of the middle BB;

[0029] Figure 6 For the utility model Figure 5 A partial enlarged view of point C in the middle.

[0030] In the figure: air storage part 1, air inlet valve 11, pressure valve 12, air guide tube 13, breathing mask 14, pressurizing device 2, compression cylinder 21, baffle 211, slide rod 22, piston 221, rack 222, first spring 23, sector gear 24, movable gear teeth 241, arc push rod 242, second spring 243, slide hole 244, annular groove 245, annular slide rail 246, connecting rod 247, rotating shaft 25, lever 251, and shift ring 252. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Generally, the components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0032] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the present invention to be protected, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0033] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0034] In the above description of the utility model, it should be noted that the terms "one side", "the other side", etc. indicate the orientation or position relationship based on the orientation or position relationship shown in the accompanying drawings, or the orientation or position relationship in which the utility model product is usually placed when in use, which is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the utility model. In addition, the terms "first", "second", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0035] In addition, the term "same" does not mean that the parts must be absolutely the same, but slight differences are allowed. The term "vertical" only means that the positional relationship between the parts is more vertical than "parallel", and does not mean that the structure must be completely vertical, but can be slightly tilted.

[0036] See also Figure 1-6The utility model provides a technical solution: a simple respirator that is easy to control, comprising an air storage unit 1, a breathing mask 14 and an air guide tube 13, wherein an air intake valve 11 for air intake and a pressure valve 12 for air exhaust are arranged on both sides of the air storage unit 1, the breathing mask 14 is connected with the pressure valve 12 through the air guide tube 13, and a pressurizing mechanism for compressing the air inside the air storage unit 1 is arranged on the air storage unit 1; the pressurizing mechanism comprises a compression cylinder 21 fixedly connected to the air storage unit 1 and a piston 221 slidably connected to the inside of the compression cylinder 21, the interior of the compression cylinder 21 is connected to the interior of the air storage unit 1, the piston 221 is tightly fitted with the inner wall of the compression cylinder 21, and the piston 221 is provided with a transmission mechanism for pushing the piston 221 to reciprocate in the compression cylinder 21.

[0037] The compression cylinder 21, piston 221, air inlet valve 11 and pressure valve 12 arranged on the air storage part 1 form a closed chamber of the air storage part 1. By controlling the piston 221 to slide downward, the volume of the air inside the air storage part 1 can be reduced and the pressure inside the air storage part 1 can be increased. Under the action of the pressure difference between the air storage part 1 and the breathing mask 14, the air in the air storage part 1 flows out from the pressure valve 12 and enters the breathing mask 14 through the air guide tube 13 to assist the patient to inhale; and the piston 221 is driven to reciprocate in the compression cylinder 21 through the transmission mechanism, so that the piston 221 slides downward the same distance each time, and then the volume of the air inside the air storage part 1 is compressed the same each time, resulting in an equal amount of air delivered to the breathing mask 14 each time, so that the tidal volume of each breath of the patient is relatively stable, thereby avoiding further damage to the patient's body due to excessive changes in tidal volume.

[0038] When in use, the breathing mask 14 is buckled over the patient's mouth and nose, and the piston 221 is driven to slide downward by the transmission mechanism, compressing the volume of the air in the air storage part 1, so that a positive pressure is formed inside the air storage part 1. After the air in the air storage part 1 pushes open the valve of the pressure valve 12, it flows through the airway 13 into the breathing mask 14, and finally enters the patient's lungs to achieve the purpose of assisting the patient's breathing; when the piston 221 slides to the bottom of the stroke, the transmission mechanism drives the piston 221 to slide upward. During the upward sliding process of the piston 221, the volume of the air increases. Since part of the air in the air storage part 1 flows out from the pressure valve 12, a negative pressure is formed inside the air storage part 1, and the atmospheric pressure pushes the outside air to open the valve of the air inlet valve 11, so that the outside air enters the air storage part 1, and the piston 221 finally returns to the initial position to complete the reciprocating motion. Through the repeated reciprocating motion of the piston 221, the amount of air output from the air storage part 1 to the breathing mask 14 each time is equal, so as to assist the patient's stable breathing and avoid the patient's breathing of too large or too small tidal volume, thereby causing further harm to the patient.

[0039] In this embodiment, the transmission mechanism includes a sliding rod 22 and a fan-shaped gear 24 fixedly connected to the piston 221. The upper end of the sliding rod 22 is slidably connected to the compression cylinder 21. A rack 222 meshing with the fan-shaped gear 24 is provided on the side wall of the sliding rod 22, and the rack 222 is parallel to the length direction of the sliding rod 22; the fan-shaped gear 24 is located inside the compression cylinder 21 and is rotationally connected to the compression cylinder 21.

[0040] The upper end of the slide bar 22 is slidably connected to the compression cylinder 21 by interference fit, so as to limit the free sliding of the slide bar 22 under the action of gravity; the fan gear 24 is a cylindrical gear with an incomplete number of teeth, which can quickly feedback the meshing or disengagement state with the rack 222, so as to know the movement state of the piston 221 according to the feedback meshing information; when the fan gear 24 rotates forward, the fan gear 24 and the rack 222 experience a process from the initial meshing state to the disengagement state, so as to achieve the purpose of pushing the slide bar 22 and the piston 221 on the slide bar 22 to slide downward to the lowest point; when the fan gear 24 is reversed, the fan gear 24 and the rack 222 also experience a process from the initial meshing state to the disengagement state, so as to push the slide bar 22 and the piston 221 on the slide bar 22 to slide upward to the initial point, and finally complete the reciprocating motion of the piston 221 in the compression cylinder 21.

[0041] In this embodiment, the curved surface on the outer side of the sector gear 24 includes a toothed surface with fixed gear teeth and a smooth circular surface, and an annular groove 245 coaxial with the sector gear 24 is provided on the rear side plane of the sector gear 24; a portion of the outer circular surface of the annular groove 245 corresponding to the smooth circular surface is provided with a plurality of sliding holes 244 evenly distributed along the circumferential direction of the smooth circular surface, and the sliding holes 244 vertically penetrate the smooth circular surface, and a movable gear tooth 241 is slidably connected in the sliding hole 244, and the gear parameters of the movable gear tooth 241 and the fixed gear tooth are exactly the same; an elastic member for pulling the movable gear tooth 241 into the sliding hole 244 is provided in the sliding hole 244, and the movable gear tooth 241 is retracted into the sliding hole 244 when the elastic member is in a naturally stretched state, and the bottom of the movable gear tooth 241 is against the inner circular surface of the annular groove 245, and an adjustment mechanism for pushing the movable gear tooth 241 to extend out of the sliding hole 244 is provided below the movable gear tooth 241.

[0042] The parameters such as tooth width and tooth height of the movable gear teeth 241 are exactly the same as those of the fixed gear teeth, and are arranged next to the fixed gear teeth to avoid affecting the normal transmission of the sector gear 24 and the rack 222 due to the difference in gear tooth parameters; the movable gear teeth 241 are slidably connected in the sliding hole 244 on the smooth round surface of the sector gear 24. By retracting the movable gear teeth 241 into the sliding hole 244 and connecting it to the sliding hole 244 with an elastic member, the movable gear teeth 241 are hidden to avoid the movable gear teeth 241 from sliding freely in the sliding hole 244 and affecting the normal meshing of the sector gear 24 and the rack 222; by extending or contracting the movable gear teeth 241, the number of teeth of the sector gear 24 is correspondingly increased or decreased, thereby changing the transmission efficiency between the sector gear 24 and the rack 222, and changing the stroke distance of the piston 221 accordingly, so as to adjust the tidal volume of breathing according to the actual situation of the patient.

[0043] In this embodiment, the adjustment mechanism includes an arc-shaped push rod 242 that pushes the movable gear tooth 241 to extend out of the slide hole 244, and an annular slide rail 246 fixedly installed on the bottom plane of the annular groove 245; the arc-shaped push rod 242 is fixedly connected to the movable end of the annular slide rail 246, and the end of the arc-shaped push rod 242 is a wedge-shaped structure that extends forward along the inner circular surface of the annular groove 245, and the bottom of the movable gear tooth 241 is a ball head shape.

[0044] The fixed end of the annular slide rail 246 is fixedly connected to the bottom plane of the annular groove 245 of the sector gear 24 by bolts, and the arc push rod 242 is then fixedly connected to the movable end of the annular slide rail 246 by bolts, so that the arc push rod 242 can stably slide in the annular groove 245; the end of the arc push rod 242 is processed into a wedge-shaped structure that extends forward along the inner circular surface of the annular groove 245, so that the wedge-shaped end of the arc push rod 242 can be more easily inserted into the spherical bottom of the movable gear tooth 241 during the sliding process, and then the bottom of the movable gear tooth 241 slides along the inclined surface of the wedge-shaped head to the outer circular surface of the arc push rod 242, and finally the fixed extension work of the movable gear tooth 241 is completed.

[0045] In this embodiment, a second spring 243 for driving the movable gear teeth 241 to contract is disposed on the side wall of the sliding hole 244 , and two ends of the second spring 243 are fixedly connected to the sliding hole 244 and the movable gear teeth 241 , respectively.

[0046] The spring is a very good elastic part, which has the characteristics of easy deformation and high elasticity, and can stably connect the movable gear to the sliding hole 244 without being easily damaged; wherein, the second spring 243 is a tension spring.

[0047] In this embodiment, a baffle 211 is fixedly connected to the interior of the compression cylinder 21 between the sector gear 24 and the piston 221, and the air on the upper and lower sides of the baffle 211 is connected. The upper part of the sliding rod 22 is slidably connected to the baffle 211 with a single degree of freedom along the length direction.

[0048] The baffle plate 211 is surrounded by ventilation holes that connect the upper and lower sides of the baffle plate 211 to prevent the formation of a closed space between the piston 221 and the baffle plate 211 that affects the normal sliding of the piston 221; the center of the baffle plate 211 is processed with a rectangular hole that matches the shape of the slide rod 22, and the upper part of the slide rod 22 is slidably connected to the inner surface of the rectangular hole to limit the slide rod 22 from rotating around the central axis in the length direction on the baffle plate 211, so that the meshing of the fan gear 24 and the rack 222 is more stable.

[0049] In this embodiment, a first spring 23 for driving the piston 221 to return to its original position is sleeved on the slide rod 22 , and two ends of the first spring 23 are fixedly connected to the piston 221 and the baffle 211 , respectively.

[0050] Among them, the first spring 23 is a tension spring; the tension spring is stretched during the downward movement of the piston 221, and the tension spring is stretched and deformed to store energy. After the slide rod 22 loses its downward thrust, the tension spring releases energy and pulls the piston 221 upward to the initial position, which has the advantage of quick response.

[0051] In this embodiment, a rotating shaft 25 is fixedly connected to the sector gear 24, and the front end of the rotating shaft 25 penetrates the front side wall of the compression cylinder 21 and extends into the outside of the compression cylinder 21, and the rotating shaft 25 is rotatably connected to the compression cylinder 21, and the front end of the rotating shaft 25 is connected to a driving part that drives the sector gear 24 to rotate.

[0052] Among them, the rotating shaft 25 is a stepped shaft, the middle part of the stepped shaft is connected to the fan gear 24 through a flat key, and then the fan gear 24 is clamped by the shoulder of the stepped shaft and the nut threaded on the stepped shaft to limit the axial sliding of the fan gear 24; a ball bearing is installed at the front end of the stepped shaft and is rotatably connected to the compression cylinder 21 through the ball bearing; at the same time, a limit block that fits the outer side surface of the compression cylinder 21 is threadedly installed on the stepped shaft to limit the axial sliding of the stepped shaft on the compression cylinder 21, so that the meshing of the fan gear 24 and the rack 222 is more stable.

[0053] In this embodiment, the driving part is a “Z-shaped” lever 251 , and one end of the lever 251 is fixedly connected to the front end of the rotating shaft 25 .

[0054] One end of the lever 251 is fixedly connected to the rotating shaft 25 via a pin. The lever 251 is in a "Z" shape, which can reduce the force required by the user to drive the rotating shaft 25 to rotate, thereby saving the user's physical strength.

[0055] In this embodiment, the adjustment mechanism also includes a shifting ring 252 that passes through the rear side wall of the compression cylinder 21 and is inserted into the outside of the compression cylinder 21, and an "L-shaped" connecting rod 247 arranged inside the compression cylinder 21. The shifting ring 252 is rotatably connected to the compression cylinder 21, and the shifting ring 252 is coaxial with the fan gear 24. The two ends of the connecting rod 247 are respectively fixedly connected to the shifting ring 252 and the arc-shaped push rod 242.

[0056] The shift ring 252 is a hollow annular structure, the interior of which is sleeved on the rear end of the rotating shaft 25, providing further support for the rotating shaft 25 and the sector gear 24; the outer cylindrical surface of the shift ring 252 is rotatably connected to the compression cylinder 21 via a ball bearing, and the shift ring 252 and the arc-shaped push rod 242 are connected into a whole via a connecting rod 247, so that it is only necessary to manually rotate one end of the shift ring 252 located outside the compression cylinder 21 to make the shift ring 252 and the rotating shaft 25 rotate relative to each other, thereby controlling the arc-shaped push rod 242 to slide in the annular groove 245, thereby finally achieving control of the movable gear teeth 241, and the operation is simple and convenient.

[0057] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.

Claims

1. A simple ventilator that is easy to control, comprising an air storage unit (1), a breathing mask (14) and an air duct (13), wherein an air inlet valve (11) for air intake and a pressure valve (12) for air discharge are provided on both sides of the air storage unit (1), and the breathing mask (14) is connected to the pressure valve (12) through the air duct (13), characterized in that: The air storage portion (1) is provided with a pressurizing mechanism for compressing the air inside the air storage portion (1); The pressurizing mechanism comprises a compression cylinder (21) fixedly connected to the air storage part (1) and a piston (221) slidably connected to the interior of the compression cylinder (21); the interior of the compression cylinder (21) is communicated with the interior of the air storage part (1); the piston (221) is tightly fitted to the inner wall of the compression cylinder (21); and a transmission mechanism is provided on the piston (221) for pushing the piston (221) to perform reciprocating motion in the compression cylinder (21).

2. A simple ventilator that is easy to control according to claim 1, characterized in that: The transmission mechanism comprises a slide rod (22) fixedly connected to the piston (221) and a sector gear (24); the upper end of the slide rod (22) is slidably connected to the compression cylinder (21); a rack (222) meshing with the sector gear (24) is provided on the side wall of the slide rod (22); and the rack (222) is parallel to the length direction of the slide rod (22); The sector gear (24) is located inside the compression cylinder (21) and is rotationally connected to the compression cylinder (21).

3. A simple ventilator that is easy to control according to claim 2, characterized in that: The curved surface on the outer side of the sector gear (24) includes a toothed surface with fixed gear teeth and a smooth circular surface, and an annular groove (245) coaxial with the sector gear (24) is provided on the rear side plane of the sector gear (24); A portion of the outer circular surface of the annular groove (245) corresponding to the smooth circular surface is provided with a plurality of sliding holes (244) evenly distributed along the circumferential direction of the smooth circular surface, and the sliding holes (244) vertically penetrate the smooth circular surface, and movable gear teeth (241) are slidably connected in the sliding holes (244), and the gear parameters of the movable gear teeth (241) and the fixed gear teeth are completely the same; An elastic member for pulling the movable gear tooth (241) into the sliding hole (244) is provided in the sliding hole (244), and the movable gear tooth (241) is retracted into the sliding hole (244) when the elastic member is in a naturally extended state, and the bottom of the movable gear tooth (241) abuts against the inner circular surface of the annular groove (245), and an adjustment mechanism for pushing the movable gear tooth (241) to extend out of the sliding hole (244) is provided below the movable gear tooth (241).

4. A simple ventilator that is easy to control according to claim 3, characterized in that: The adjustment mechanism comprises an arc-shaped push rod (242) for pushing the movable gear (241) to extend out of the slide hole (244) and an annular slide rail (246) fixedly mounted on the bottom plane of the annular groove (245); The arc push rod (242) is fixedly connected to the movable end of the annular slide rail (246), and the end of the arc push rod (242) is a wedge-shaped structure extending forward along the inner surface of the annular groove (245), and the bottom of the movable gear tooth (241) is spherical.

5. A simple ventilator that is easy to control according to claim 4, characterized in that: A second spring (243) for driving the movable gear teeth (241) to contract is provided on the side wall of the sliding hole (244), and two ends of the second spring (243) are respectively fixedly connected to the sliding hole (244) and the movable gear teeth (241).

6. A simple ventilator that is easy to control according to claim 5, characterized in that: A baffle (211) is fixedly connected inside the compression cylinder (21) between the sector gear and the piston, and the air on the upper and lower sides of the baffle (211) is connected. The upper part of the sliding rod (22) is slidably connected to the baffle (211) with a single degree of freedom along the length direction.

7. A simple ventilator that is easy to control according to claim 6, characterized in that: The slide rod (22) is sleeved with a first spring (23) for driving the piston (221) to return to its original position. The two ends of the first spring (23) are respectively fixedly connected to the piston (221) and the baffle (211).

8. The easy-to-control simple ventilator according to claim 7, characterized in that: A rotating shaft (25) is fixedly connected to the sector gear (24), the front end of the rotating shaft (25) penetrates the front side wall of the compression cylinder (21) and extends outside the compression cylinder (21), and the rotating shaft (25) is rotationally connected to the compression cylinder (21), and the front end of the rotating shaft (25) is connected to a driving part that drives the sector gear (24) to rotate.

9. The easy-to-control simple ventilator according to claim 8, characterized in that: The driving part is a "Z-shaped" lever (251), one end of which is fixedly connected to the front end of the rotating shaft (25).

10. The easy-to-control simple ventilator according to claim 9, characterized in that: The adjustment mechanism also includes a shift ring (252) that penetrates through the rear side wall of the compression cylinder (21) and is inserted outside the compression cylinder (21), and an "L-shaped" connecting rod (247) that is arranged inside the compression cylinder (21). The shift ring (252) is rotatably connected to the compression cylinder (21), and the shift ring (252) is coaxial with the fan gear (24). The two ends of the connecting rod (247) are fixedly connected to the shift ring (252) and the arc-shaped push rod (242) respectively.

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