Sputum suction device for nursing old people

Abstract

The invention provides a sputum suction device for old people nursing, and relates to the technical field of sputum suction, the sputum suction device comprises a sputum collection device and a sputum negative pressure device, the sputum negative pressure device comprises a negative pressure cylinder, a negative pressure plate, a pressing type negative pressure sputum suction mechanism, a fixed pulley steering mechanism, a gear type movable pulley acceleration mechanism and a negative pressure plate reset mechanism, the negative pressure cylinder is communicated with the sputum collection device through the air guide pipe, the negative pressure plate is arranged in the negative pressure cylinder, the pressing type negative pressure sputum suction mechanism is arranged in the negative pressure cylinder in a penetrating mode and connected with the negative pressure plate through a pull rope, the fixed pulley steering mechanism is attached to the pull rope and rotationally connected with the negative pressure cylinder, and the gear type movable pulley acceleration mechanism is arranged in the negative pressure cylinder, and one end of the gear type movable pulley acceleration mechanism is connected with the negative pressure cylinder. When the pressing type negative pressure sputum suction mechanism is pressed, under the steering of the fixed pulley steering mechanism, the pull rope pulls the negative pressure plate to move, negative pressure sputum suction is achieved, the movable pulley rotates while moving under the assistance of the gear type movable pulley acceleration mechanism, the pull rope is wound, and movement of the negative pressure plate is accelerated.

Description

Technical Field

[0001] The invention relates to the technical field of sputum suction, and in particular to a sputum suction device for elderly care. Background Art

[0002] When the elderly have phlegm in their throat, they need to use a sputum suction device to extend into the throat to suction the phlegm. The existing sputum suction device includes a negative pressure device, a sputum collection box, and a drainage tube. The drainage tube is extended into the throat, and the negative pressure device is started. Under the action of negative pressure, the sputum passes through the drainage tube and enters the sputum collection box for collection. During drainage, the drainage tube needs to be slowly rotated and drawn out; The existing negative pressure devices include electric negative pressure devices and manual negative pressure devices. The manual negative pressure devices generate negative pressure by pulling and pulling, so two hands are needed to operate the pulling and pulling. Therefore, additional personnel are needed to rotate and pull out the drainage tube, which increases the use of manpower. To address the above problems, we propose a sputum suction device for elderly care. Summary of the invention

[0003] The present invention aims to solve the problem in the prior art that negative pressure suction by manual negative pressure device requires cooperation of two persons, resulting in waste of human resources. We propose a suction device for elderly care.

[0004] The present invention provides a sputum suction device for elderly care, comprising a sputum collection device and a sputum negative pressure device, wherein the sputum collection device is connected to the sputum negative pressure device through an airway; The sputum negative pressure device includes a negative pressure cylinder, a negative pressure plate, a pressing negative pressure suction mechanism, a fixed pulley steering mechanism, a gear-type movable pulley acceleration mechanism, and a negative pressure plate reset mechanism. The negative pressure cylinder is connected to the sputum collection device through an airway tube. The negative pressure plate is fitted inside the negative pressure cylinder. The pressing negative pressure suction mechanism is passed through the negative pressure cylinder and connected to the negative pressure plate through a pull rope. The fixed pulley steering mechanism is fitted to the pull rope and is rotatably connected to the negative pressure cylinder. The gear-type movable pulley acceleration mechanism is arranged in the negative pressure cylinder, and one end is connected to the negative pressure cylinder, and the other end is connected to the pressing negative pressure suction mechanism. The negative pressure plate reset mechanism is arranged in the negative pressure cylinder and is located between the negative pressure plate and the pressing negative pressure suction mechanism.

[0005] A further improved solution of the present invention, the push-type negative pressure sputum suction mechanism comprises a push column, a movable pulley mechanism, a connecting disc, a connecting frame, and a stabilizing ring; The pushing column is provided with a transverse through groove and a vertical through groove, and the transverse through groove is communicated with the vertical through groove. The movable pulley mechanism is arranged in the vertical through groove, and its two sides movably pass through the pushing column and are connected with the gear-type movable pulley acceleration mechanism. The pushing column is inserted into the negative pressure cylinder, and the connecting disc is fixedly connected to the end of the pushing column arranged inside the negative pressure cylinder. The connecting frame is distributed in a ring array with the center position of the connecting disc as the reference. The two ends of the connecting frame are respectively connected to a stabilizing ring and an end of the connecting disc. The stabilizing ring is sleeved on the surface of the pushing column, and its outer surface is in contact with the inner wall of the negative pressure cylinder.

[0006] According to a further improvement of the present invention, the movable pulley mechanism comprises a movable pulley and a connecting shaft, wherein the movable pulley is arranged in a vertical through groove, and the connecting shaft is fixedly concentrically through the center end of the movable pulley and movably passes through both sides of the pushing column.

[0007] A further improvement of the present invention is that the gear-type movable pulley acceleration mechanism includes a rack and a gear. Two racks are symmetrically distributed with the center position of the negative pressure cylinder as a reference. The two racks are connected by a support frame, and the support frame is fixed to the inner wall of the negative pressure cylinder. The gear is meshed with the rack and is coaxially fixedly connected to the connecting shaft.

[0008] A further improvement of the present invention is that the negative pressure plate resetting mechanism includes a ring plate and a spring. The ring plate is fixedly connected to the inside of the negative pressure cylinder and is located between the negative pressure plate and the support frame. The spring is arranged in the negative pressure cylinder and is located between the negative pressure plate and the ring plate.

[0009] A further improvement of the present invention is that a centering guide mechanism is provided in the negative pressure cylinder, and the centering guide mechanism includes a guide wheel and a rotating shaft. The guide wheel is arranged between the ring plate and the support frame, and is rotatably connected to the negative pressure cylinder through the rotating shaft. The pull rope is pressed against the guide wheel, and the lowest point of the pressure is on the same horizontal line as the center point of the negative pressure plate.

[0010] A further improvement scheme of the present invention is that the fixed pulley steering mechanism includes a fixed pulley and a rotating shaft, the fixed pulley is arranged in a vertical through groove, the rotating shaft is concentrically fixed through the fixed pulley and extends out of the transverse through groove to be rotatably connected with the negative pressure cylinder, and the pull rope is wrapped around the fixed pulley from the upper end surface to the lower end surface and connected to the upper end of the movable pulley.

[0011] A further improvement of the present invention is that the end of the negative pressure cylinder close to the push column is connected to a stable sealing plate, the push column passes through the stable sealing plate, the stable sealing plate is provided with an air outlet, and the outer end of the surface of the negative pressure cylinder close to the push column is connected to an ear plate.

[0012] According to a further improvement of the present invention, the sputum collection device comprises a collection box and a drainage tube, wherein the collection box is connected to the negative pressure cylinder via an airway tube, and the drainage tube is in communication with the collection box.

[0013] A further improvement of the present invention is that a pushing mechanism is provided on the connecting disc, and the pushing mechanism includes a guide wheel and a support frame. The support frame is provided with two groups and is symmetrically fixedly connected to the connecting disc. The guide wheel is rotatably connected between the two support frames through an axle rod.

[0014] Beneficial effects of the present invention: The present invention provides a sputum suction device for elderly care: 1. Through the negative pressure of the sputum negative pressure device, the sputum is sucked into the collection box through the drainage tube for collection, completing the sputum suction step; 2. Clamp the negative pressure cylinder with two adjacent fingers, and press the bottom of the ear plate with two fingers, press the palm of your hand on the end of the push column, press the push-type negative pressure suction mechanism, and under the steering of the fixed pulley steering mechanism, the pull rope pulls the negative pressure plate to move away from the sputum collection device to perform negative pressure suction. The movable pulley, assisted by the gear-type movable pulley acceleration mechanism, rotates while moving to reel in the pull rope, thereby accelerating the movement of the negative pressure plate and saving time. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 The present invention is a structural diagram of a sputum suction device for elderly care.

[0016] Figure 2 The internal structure of the negative pressure cylinder of the sputum suction device for elderly care of the present invention Figure 1 .

[0017] Figure 3 The internal structure of the negative pressure cylinder of the sputum suction device for elderly care of the present invention Figure 2 .

[0018] Figure 4 The present invention is a structural diagram of a negative pressure plate resetting mechanism of a sputum suction device for elderly care.

[0019] Figure 5 The present invention is a sputum suction device for elderly care Figure 4 Enlarged view of point A in the middle.

[0020] Figure 6 The present invention is a sputum suction device for elderly care Figure 3 Enlarged view of point B in the middle.

[0021] Figure 7 The present invention is a sputum suction device for elderly care Figure 3 Enlarged view of point C in the middle.

[0022] Figure 8 The present invention is a layout diagram of a pull cord of a sputum suction device for elderly care.

[0023] Fig. 9 This is a position diagram of the ear plate and the stable sealing plate of a sputum suction device for elderly care according to the present invention.

[0024] Fig.10 The present invention is a structural diagram of a sputum collection device of a sputum suction device for elderly care.

[0025] Fig.11 The present invention is a sputum suction device for elderly care Figure 3 Enlarged view of point D in the middle.

[0026] In the attached drawings: 1. sputum collection device; 2. sputum negative pressure device; 3. airway; 4. negative pressure cylinder; 5. negative pressure plate; 6. press-type negative pressure sputum suction mechanism; 7. fixed pulley steering mechanism; 8. gear-type movable pulley acceleration mechanism; 9. negative pressure plate resetting mechanism; 10. pull rope; 11. push column; 12. movable pulley mechanism; 13. connecting disc; 14. connecting frame; 15. stabilizing collar; 16. horizontal through groove; 17. vertical through groove; 18. movable pulley; 19. connecting shaft; 20. rack; 21. gear; 22. support frame; 23. collar plate; 24. spring; 25. guide wheel; 26. rotating shaft; 27. fixed pulley; 28. rotating shaft; 29. ​​ear plate; 30. collection box; 31. drainage tube; 32. guide wheel; 33. support frame; 34. stable sealing plate. DETAILED DESCRIPTION

[0027] To facilitate the understanding of the present invention, the present application will be described more comprehensively below with reference to the relevant drawings; the drawings show preferred embodiments of the present invention, but the present invention can be implemented in many different forms and is not limited to the embodiments described herein; on the contrary, the purpose of providing these embodiments is to enable a more thorough and comprehensive understanding of the disclosed content of the present invention.

[0028] It should be noted that the terms “vertical”, “horizontal”, “up”, “down”, “left”, “right” and similar expressions used in this document are only for illustrative purposes and do not represent the only implementation method.

[0029] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which the present invention belongs; the terms used in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention; the term "and / or" used herein includes any and all combinations of one or more related listed items.

[0030] according to Figure 1-Figure 11 The sputum suction device for elderly care shown in the figure comprises a sputum collection device 1 and a sputum negative pressure device 2, wherein the sputum collection device 1 is connected to the sputum negative pressure device 2 through an airway 3; The sputum negative pressure device 2 includes a negative pressure cylinder 4, a negative pressure plate 5, a push-type negative pressure suction mechanism 6, a fixed pulley steering mechanism 7, a gear-type movable pulley acceleration mechanism 8, and a negative pressure plate resetting mechanism 9. The negative pressure cylinder 4 is connected to the sputum collection device 1 through the airway 3. The negative pressure plate 5 is fitted inside the negative pressure cylinder 4. The push-type negative pressure suction mechanism 6 is inserted into the negative pressure cylinder 4 and connected to the negative pressure plate 5 through a pull rope 10. The fixed pulley steering mechanism 7 is fitted to the pull rope 10 and is rotatably connected to the negative pressure cylinder 4. The gear-type movable pulley acceleration mechanism 8 is arranged in the negative pressure cylinder 4, and one end is connected to the negative pressure cylinder 4. The other end is connected to the pressing negative pressure suction mechanism 6. The negative pressure plate resetting mechanism 9 is arranged in the negative pressure cylinder 4 and is between the negative pressure plate 5 and the pressing negative pressure suction mechanism 6. The negative pressure plate 5 is reset after displacement. The pressing negative pressure suction mechanism 6 is pressed. Under the steering of the fixed pulley steering mechanism 7, the pull rope 10 pulls the negative pressure plate 5 to move away from the sputum collection device 1 to perform negative pressure suction. With the assistance of the gear-type movable pulley acceleration mechanism 8, the pressing negative pressure suction mechanism 6 rotates while moving, and the pull rope 10 is reeled in, thereby accelerating the movement of the negative pressure plate 5.

[0031] The push-type negative pressure sputum suction mechanism 6 includes a pushing column 11, a movable pulley mechanism 12, a connecting disc 13, a connecting frame 14, and a stabilizing ring 15. The pushing column 11 is provided with a transverse through groove 16 and a vertical through groove 17, and the transverse through groove 16 is communicated with the vertical through groove 17. The movable pulley mechanism 12 is arranged in the vertical through groove 17. The transverse through groove 16 and the vertical through groove 17 facilitate relative displacement between the pushing column 11 and the movable pulley mechanism 12 to leave a moving space, and both sides thereof movably pass through the pushing column 11 and are connected to the gear-type movable pulley acceleration mechanism 8. The pushing column 11 is inserted into the negative pressure cylinder 4, and the connecting disc 13 is fixedly connected to the pushing column 11 and is arranged in the negative pressure cylinder 4. At the internal end, the connecting frame 14 is distributed in a circular array with the center position of the connecting disc 13 as the reference. The two ends of the connecting frame 14 are respectively connected to the stabilizing ring 15 and the end of the connecting disc 13. The stabilizing ring 15 is sleeved on the surface of the pushing column 11, and its outer surface is in contact with the inner wall of the negative pressure cylinder 4. The stability of the pushing column 11 is increased by connecting the disc 13, the connecting frame 14, and the stabilizing ring 15. The pushing column 11 is pressed to drive the movable pulley mechanism 12 to move, drive the pull rope 10 to move, and with the assistance of the gear-type movable pulley acceleration mechanism 8, the movable pulley mechanism 12 is rotated, so that the pull rope 10 is assisted in winding up, thereby accelerating the movement of the negative pressure plate 5.

[0032] The movable pulley mechanism 12 includes a movable pulley 18 and a connecting shaft 19. The movable pulley 18 is arranged in the vertical through groove 17. The connecting shaft 19 is concentrically fixed through the center end of the movable pulley 18 and movably passes through both sides of the pushing column 11. The gear-type movable pulley acceleration mechanism 8 includes a rack 20 and a gear 21. There are two racks 20 symmetrically distributed with the center position of the negative pressure cylinder 4 as a reference. The two racks 20 are connected by a support frame 22. The support frame 22 is fixed to the inner wall of the negative pressure cylinder 4. The gear 21 is meshed with the rack 20 and is coaxially fixedly connected with the connecting shaft 19. When the connecting shaft 19 moves, it drives the gear 21 to move. With the assistance of the rack 20, the gear 21 rotates, the connecting shaft 19 rotates, the movable pulley 18 rotates, and the movable pulley 18 rotates while moving, so that the pull rope 10 is wound and moved.

[0033] The negative pressure plate reset mechanism 9 includes a ring plate 23 and a spring 24. The ring plate 23 is fixedly connected to the inside of the negative pressure cylinder 4 and is located between the negative pressure plate 5 and the support frame 22. The spring 24 is arranged in the negative pressure cylinder 4 and is located between the negative pressure plate 5 and the ring plate 23. Through the squeezing force of the spring 24, the negative pressure plate 5 is pushed to reset and restore, and the pull rope 10 is in a taut state.

[0034] A centering guide mechanism is provided in the negative pressure cylinder 4, and the centering guide mechanism includes a guide wheel 25 and a rotating shaft 26. The guide wheel 25 is provided between the ring plate 23 and the support frame 22, and is rotatably connected to the negative pressure cylinder 4 through the rotating shaft 26. The pull rope 10 is pressed against the guide wheel 25, and the lowest point of the pressing is on the same horizontal line as the center point of the negative pressure plate 5. Through the guide wheel 25, the pull rope 10 is in a horizontal state and is at the center of the negative pressure plate 5 and is perpendicular to the negative pressure plate 5.

[0035] The fixed pulley steering mechanism 7 includes a fixed pulley 27 and a rotating shaft 28. The fixed pulley 27 is arranged in the vertical through groove 17. The rotating shaft 28 is concentrically fixed through the fixed pulley 27 and extends out of the horizontal through groove 16, and is rotatably connected to the negative pressure cylinder 4. The pull rope 10 is wound around the fixed pulley 27 from the upper end surface to the lower end surface of the fixed pulley 27 and is connected to the upper end of the movable pulley 18. The fixed pulley 27 plays a role in changing the pulling direction of the pull rope 10, so that negative pressure can be pressed.

[0036] The end of the negative pressure cylinder 4 close to the pushing column is connected with a stabilizing sealing plate 34, and the pushing column 11 passes through the stabilizing sealing plate 34. The stabilizing sealing plate 34 plays the role of stabilizing the pushing column 11. An air outlet is provided on the stabilizing sealing plate 34. When the pushing column 11 is pressed, the negative pressure cylinder 4 can be exhausted. The outer end of the surface of the negative pressure cylinder 4 close to the pushing column 11 is connected with an ear plate 29 to facilitate the finger to hold it.

[0037] The sputum collection device 1 includes a collection box 30 and a drainage tube 31. The collection box 30 is connected to the negative pressure cylinder 4 through the airway tube 3, and the drainage tube 31 is connected to the collection box 30. The sputum is absorbed by the drainage tube 31, and the collection box 30 collects the sputum.

[0038] A pushing mechanism is provided on the connecting disc 13, and the pushing mechanism includes a guide wheel 32 and a support frame 33. The support frame 33 is provided with two groups, which are symmetrically fixedly connected to the connecting disc 13. The guide wheel 32 is rotatably connected between the two support frames 33 through an axle rod. The pull rope 10 is pushed upward by the guide wheel 32, so that the part of the pull rope 10 between the fixed pulley 27 and the movable pulley 18 is an oblique structure, which facilitates the end of the pull rope 10 to be wrapped around the movable pulley 18.

[0039] Principle of the present invention: When in use, the drainage tube 31 is connected to the collection box 30, and the two ends of the airway tube 3 are connected to the collection box 30 and the negative pressure cylinder 4 respectively. The negative pressure cylinder 4 is clamped by the middle finger and the ring finger, and two fingers are pressed against the bottom of the ear plate 29. The palm of the hand is pressed on the end of the push column 11, and the push column 11 is pressed. The push column 11 moves toward the direction of the collection box 30, and one end of the pull rope 10 is turned under the turning of the fixed pulley 27. Therefore, the turning end of the pull rope 10 moves in the direction of the negative pressure plate 5. Therefore, the negative pressure plate 5 moves away from the collection box 30, so that the collection box 30 is negatively pressurized, and the sputum is absorbed into the collection box 30. When suctioning sputum, the drainage tube 31 is rotated and slowly pulled out; When the push column 11 moves, it drives the movable pulley 18 to move, drives the gear 21 to move, and with the assistance of the rack 20, the gear 21 moves and rotates, drives the movable pulley 18 to rotate, and reels the pull rope 10, so that the pull rope 10 moves in a reeling manner, accelerates the movement of the negative pressure plate 5, and saves the time of liquid suction; After the drainage tube 31 is pulled out, when the negative pressure plate 5 needs to be reset, the negative pressure cylinder 4 is fixed, and the push column 11 is pulled to move the movable pulley 18 away from the negative pressure plate 5. Under the extrusion force of the spring 24, the negative pressure plate 5 moves away from the movable pulley 18 and resets.

[0040] Although the present invention has been disclosed as above in the form of a preferred embodiment, it is not intended to limit the present invention. Anyone familiar with this technology can make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention should be based on the definition of the authorization requirements.

Claims

1. A sputum suction device for elderly care, comprising a sputum collection device (1) and a sputum negative pressure device (2), characterized in that: The sputum collection device (1) is connected to the sputum negative pressure device (2) via an airway tube (3); The sputum negative pressure device (2) comprises a negative pressure cylinder (4), a negative pressure plate (5), a pressing negative pressure sputum suction mechanism (6), a fixed pulley steering mechanism (7), a gear-type movable pulley acceleration mechanism (8), and a negative pressure plate resetting mechanism (9); the negative pressure cylinder (4) is connected to the sputum collection device (1) via an airway (3); the negative pressure plate (5) is fitted inside the negative pressure cylinder (4); the pressing negative pressure sputum suction mechanism (6) is inserted into the negative pressure cylinder (4) and is arranged via a positive pressure plate. The pull rope (10) is connected to the negative pressure plate (5); the fixed pulley steering mechanism (7) is fitted to the pull rope (10) and is rotationally connected to the negative pressure cylinder (4); the gear-type movable pulley acceleration mechanism (8) is arranged in the negative pressure cylinder (4) and one end is connected to the negative pressure cylinder (4) and the other end is connected to the pressing negative pressure suction mechanism (6); the negative pressure plate reset mechanism (9) is arranged in the negative pressure cylinder (4) and is located between the negative pressure plate (5) and the pressing negative pressure suction mechanism (6).

2. A sputum suction device for elderly care according to claim 1, characterized in that: The push-type negative pressure sputum suction mechanism (6) comprises a push column (11), a movable pulley mechanism (12), a connecting disc (13), a connecting frame (14), and a stabilizing ring (15); The push column (11) is provided with a transverse through groove (16) and a vertical through groove (17), and the transverse through groove (16) is connected to the vertical through groove (17). The movable pulley mechanism (12) is arranged in the vertical through groove (17), and its two sides movably pass through the push column (11) and are connected to the gear-type movable pulley acceleration mechanism (8). The push column (11) is inserted into the negative pressure cylinder (4), and the connecting disc (13) is fixedly connected to the end of the push column (11) arranged inside the negative pressure cylinder (4). The connecting frame (14) is distributed in a circular array with the center position of the connecting disc (13) as a reference. The two ends of the connecting frame (14) are respectively connected to the stabilizing ring (15) and the end of the connecting disc (13). The stabilizing ring (15) is sleeved on the surface of the push column (11), and its outer surface is in contact with the inner wall of the negative pressure cylinder (4).

3. A sputum suction device for elderly care according to claim 2, characterized in that: The movable pulley mechanism (12) comprises a movable pulley (18) and a connecting shaft (19); the movable pulley (18) is arranged in a vertical through slot (17); the connecting shaft (19) is fixedly passed through the central end of the movable pulley (18) and movably passed through both sides of the pushing column (11).

4. A sputum suction device for elderly care according to claim 3, characterized in that: The gear-type movable pulley acceleration mechanism (8) comprises a rack (20) and a gear (21). Two racks (20) are symmetrically distributed with the center position of the negative pressure cylinder (4) as a reference. The two racks (20) are connected by a support frame (22). The support frame (22) is fixed to the inner wall of the negative pressure cylinder (4). The gear (21) is meshed with the rack (20) and is coaxially fixedly connected to the connecting shaft (19).

5. A sputum suction device for elderly care according to claim 4, characterized in that: The negative pressure plate resetting mechanism (9) comprises a collar plate (23) and a spring (24); the collar plate (23) is fixedly connected to the inside of the negative pressure cylinder (4) and is located between the negative pressure plate (5) and the support frame (22); the spring (24) is arranged in the negative pressure cylinder (4) and is located between the negative pressure plate (5) and the collar plate (23).

6. A sputum suction device for elderly care according to claim 5, characterized in that: A centering guide mechanism is provided inside the negative pressure cylinder (4), and the centering guide mechanism comprises a guide wheel (25) and a rotating shaft (26). The guide wheel (25) is provided between the collar plate (23) and the support frame (22), and is rotatably connected to the negative pressure cylinder (4) via the rotating shaft (26). The pull rope (10) is pressed against the guide wheel (25), and the lowest point of the pressing is on the same horizontal line as the center point of the negative pressure plate (5).

7. A sputum suction device for elderly care according to claim 6, characterized in that: The fixed pulley steering mechanism (7) comprises a fixed pulley (27) and a rotating shaft (28). The fixed pulley (27) is arranged in a vertical through groove (17). The rotating shaft (28) is fixedly passed through the fixed pulley (27) concentrically and extends out of the transverse through groove (16) to be rotationally connected to the negative pressure cylinder (4). The pull rope (10) is wound around the fixed pulley (27) from the upper end surface to the lower end surface of the fixed pulley (27) and is connected to the upper end of the movable pulley (18).

8. A sputum suction device for elderly care according to claim 7, characterized in that: The end of the negative pressure cylinder (4) close to the push column is connected to a stabilizing sealing plate (34), the push column (11) passes through the stabilizing sealing plate (34), an air outlet is provided on the stabilizing sealing plate (34), and the outer end of the surface of the negative pressure cylinder (4) close to the push column (11) is connected to an ear plate (29).

9. A sputum suction device for elderly care according to claim 8, characterized in that: The sputum collection device (1) comprises a collection box (30) and a drainage tube (31); the collection box (30) is connected to a negative pressure cylinder (4) via an airway tube (3); and the drainage tube (31) is in communication with the collection box (30).

10. A sputum suction device for elderly care according to claim 9, characterized in that: The connecting disc (13) is provided with a pushing mechanism, the pushing mechanism comprising a guide wheel (32) and a support frame (33), the support frame (33) being provided with two groups and symmetrically fixedly connected to the connecting disc (13), the guide wheel (32) being rotatably connected between the two support frames (33) via a shaft.

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