Manual negative pressure sputum aspirator

Abstract

The invention discloses a manual negative pressure sputum aspirator, which relates to the technical field of medical instruments and comprises a sputum aspirator body, a suction pull rod for driving the sputum aspirator body to work is fixedly connected to the rear part of the sputum aspirator body, and a rotating mechanism for driving the suction pull rod to reciprocate is arranged outside the suction pull rod. An extending mechanism used for saving labor is arranged on the side face of the sputum aspirator body, a supporting mechanism used for maintaining stable work of the suction pull rod is arranged at the bottom of the sputum aspirator body, and a positioning mechanism used for maintaining the inclination angle of the sputum aspirator body is arranged in the middle of the supporting mechanism. The suction pull rod is driven to work in a reciprocating mode through rotation of the rotating disc, small force of hand rotation is converted into large stroke pulling force of the pull rod, physical power needed by single-time operation is greatly reduced, the fatigue degree of operation is reduced, and the rotating mechanism ensures that the stroke of reciprocating motion of the pull rod every time is consistent through mechanical limiting. And the problem of unstable negative pressure caused by non-uniform force during manual direct pulling is avoided.

Description

Technical Field

[0001] The invention relates to the technical field of medical devices, in particular to a manual negative pressure sputum aspirator. Background Art

[0002] A manual suction pump is a portable medical device used to clear secretions from the patient's respiratory tract (such as sputum, blood or vomit). It is particularly suitable for situations where the patient cannot cough up sputum on his own or electric suction equipment is not available. Compared with traditional electric suction pumps, manual suction pumps do not need to rely on power or complicated operating procedures, so they can provide great convenience for medical institutions and home care.

[0003] When using a manual suction pump, the user needs to continuously pull the rod to generate negative pressure, especially when operating for a long time. This is both laborious and prone to fatigue. As the operator's hands become tired, the rod may not be pulled into place every time. Decreased operating strength may lead to unstable negative pressure, affecting the suction effect or increasing the risk of mucosal damage.

[0004] Therefore, the present invention proposes a manual negative pressure sputum suction device to make up for and improve the deficiencies of the prior art. Summary of the invention

[0005] In view of the above problems, the invention provides a manual negative pressure sputum suction device, which can effectively solve the problem of unstable negative pressure caused by long-term operation of the sputum suction device in the prior art. In order to achieve the above purpose, the embodiment of the present application provides the following technical solutions:

[0006] The present invention discloses a manual negative pressure sputum suction device, comprising a sputum suction device body, a suction rod for driving the sputum suction device body to work is fixedly connected to the rear of the sputum suction device body, a rotating mechanism for driving the suction rod to move back and forth is arranged outside the suction rod, an extension mechanism for saving effort is arranged on the side of the sputum suction device body, a supporting mechanism for keeping the suction rod working stably is arranged at the bottom of the sputum suction device body, and a positioning mechanism for keeping the inclination angle of the sputum suction device body is arranged in the middle of the supporting mechanism;

[0007] The rotating mechanism includes a shell symmetrically fixedly connected to the outside of the suction device body, a Y-shaped bracket is fixedly connected between the two shells, the top of the Y-shaped bracket is slidably connected to the suction rod, the side of the Y-shaped bracket is rotatably connected to a swing rod, and a locking mechanism for preventing the rotating mechanism from working is also arranged inside the two shells.

[0008] Furthermore, the rotating mechanism also includes a rotating shaft rotatably connected to the middle part of the Y-shaped bracket, one end of the rotating shaft is fixedly connected to a rotating disk, the other end of the rotating shaft extends to the outside of the shell, the rotating disk is fixedly connected to a first lever away from the end of the rotating shaft, a first sliding groove is opened in the middle of the swing rod, the first sliding groove slides through the first sliding groove, and the first sliding rod is slidably connected to the swing rod, a second sliding rod is fixedly connected to the top of the swing rod, a connecting block is fixedly connected to the side of the suction pull rod, a second sliding groove is opened on the surface of the connecting block, and the second sliding rod slides in the second sliding groove.

[0009] Furthermore, the extension mechanism includes a rotating rod, one end of the rotating rod is fixedly connected to an end of the rotating shaft away from the rotating disk, an extension rod is slidably connected in a cavity at one end of the rotating rod, a first spring is fixedly connected between the extension rod and the rotating rod cavity, and the extension rod is rotatably connected to an end away from the rotating rod.

[0010] Furthermore, the extension mechanism also includes a receiving groove opened on the side of the extension rod, a card plate is arranged inside the receiving groove, the card plate is rotatably connected to the extension rod, and a through hole is opened on the side of the receiving groove for the top of the card plate to move to the outside of the receiving groove, a metal spring sheet is tightly fitted on the side of the card plate, and the metal spring sheet is fixedly connected to the extension rod at one end away from the card plate, a card groove matching the top of the card plate is opened on the side of the rotating rod cavity, and a dial plate for driving the card plate to rotate is fixedly connected to the bottom of the rocker.

[0011] Furthermore, the support mechanism includes a handle fixedly connected to the side of the shell, a circular ring is fixedly connected to the bottom of the handle, a U-shaped connector is rotatably connected to the middle of the circular ring, a support plate is fixedly connected to the side of the U-shaped connector, and an arc-shaped clamp is symmetrically fixedly connected to the side of the support plate.

[0012] Furthermore, the positioning mechanism includes a disc symmetrically fixedly connected to the side of the U-shaped connecting piece, and a plurality of limit blocks are fixedly connected to the side where the two discs are close to each other. A connecting shaft is also rotatably connected to the side where the two discs are close to each other. The two connecting shafts extend into the inner ring of the ring and are rotatably connected to the ring. Grooves are provided on both sides of the ring, and the grooves match the limit blocks.

[0013] Furthermore, the positioning mechanism also includes a first movable rod slidably connected in the handle cavity, the bottom of the first movable rod slides through the circular ring and extends to the inner circle of the circular ring, the two connecting shafts are close to each other and are fixedly connected with an L-shaped connecting rod at one end, the two L-shaped connecting rods are arranged alternately with each other, and the bottom extended end of the first movable rod is fixedly connected with a trapezoidal block, and the inclined surfaces on both sides of the trapezoidal block are respectively slidably connected to the side surfaces of the two L-shaped connecting rods.

[0014] Further, a second spring is sleeved outside the first moving rod. One end of the second spring is fixedly connected to the protrusion outside the first moving rod, and the other end of the second spring is fixedly connected to the inner wall of the grip cavity. An arc-shaped pressing block is rotatably connected to the side of the grip. The arc-shaped side of the pressing block is slidably connected to the top of the first moving rod.

[0015] Further, the locking mechanism includes a connecting rod fixedly connected to the side of the first moving rod. One end of the connecting rod away from the first moving rod is fixedly connected to a second moving rod. The top of the second moving rod extends upward to the top of the grip, and the second moving rod is slidably connected to the grip.

[0016] Further, the locking mechanism further includes a third chute opened on the side of the housing. A moving block is slidably connected in the third chute. One end of the moving block is fixedly connected to the side of the top of the second moving rod. The other end of the moving block penetrates through the third chute and extends to the side of the swing rod. An inverted U-shaped block is fixedly connected to the side of the swing rod, and the end of the moving block away from the second moving rod is inserted into the middle of the U-shaped block.

[0017] Beneficial effects:

[0018] 1. By setting a rotating mechanism, the device drives the suction pull rod to work reciprocally by the rotation of the rotating disc, converts the relatively small force of hand rotation into a relatively large stroke pulling force of the pull rod, greatly reduces the physical strength required for a single operation, reduces the fatigue degree of operation. The rotating mechanism ensures that the stroke of each reciprocating movement of the pull rod is consistent through mechanical limit, avoids the problem of unstable negative pressure caused by uneven force when directly pulled manually, can maintain a more stable negative pressure, and reduces the attraction fluctuation.

[0019] 2. By setting an extension mechanism, when using the rotating mechanism to pull the suction pull rod, the extension rod pops out from the cavity of the rotating rod. By popping out the extension rod from the cavity of the rotating rod, in essence, the length of the force arm is increased. The long force arm allows the operator to drive the rotation with large joints such as the elbow or shoulder, replacing the small muscle groups of the wrist or fingers relied on by the traditional pull rod, delaying the accumulation of fatigue, and further improving the operation stability.

[0020] 3. By setting a positioning mechanism, when using the suction device, the inclination angle of the suction device is fixed through the positioning mechanism. The stable angle reduces the risk of injury caused by unstable hand or accidental movement, protects the safety of the patient. At the same time, for the operator, it also reduces the fatigue caused by long-term hand holding, and further reduces the possibility of operation errors.

[0021] 4. The device is provided with a locking mechanism. During the process of adjusting the tilting angle of the suction apparatus, the locking mechanism is used to block the operation of the suction rod. The locking mechanism can prevent the accidental activation of the suction function when medical staff adjust the angle of the suction apparatus, avoiding unnecessary stimulation or injury to the patient's respiratory tract caused by misoperation or unstable hands. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0023] Figure 1 It is a three-dimensional structure diagram of the first perspective of the present invention.

[0024] Figure 2 It is a three-dimensional structure diagram of the second perspective of the present invention.

[0025] Figure 3 It is a three-dimensional structure diagram of the rotation mechanism in the present invention.

[0026] Figure 4 In the present invention Figure 3 It is an enlarged structure diagram of part A.

[0027] Figure 5 It is a three-dimensional structure diagram of the other perspective of the rotation mechanism in the present invention.

[0028] Figure 6 It is a three-dimensional structure diagram of the extension mechanism in the present invention.

[0029] Figure 7 In the present invention Figure 6 It is an enlarged structure diagram of part B.

[0030] Figure 8 It is a three-dimensional structure diagram of the locking mechanism in the present invention.

[0031] Figure 9 It is a three-dimensional structure diagram of the positioning mechanism in the present invention.

[0032] Figure 10 It is a three-dimensional structure diagram of the support plate in the present invention.

[0033] Figure 11 In the present invention Figure 10 It is an enlarged structure diagram of part C.

[0034] Figure 12 It is an exploded view of the positioning mechanism in the present invention.

[0035] The reference numerals in the figure respectively represent: 10, the sputum aspirator body; 20, the suction pull rod; 30, the rotating mechanism; 301, the Y-shaped bracket; 302, the rotating disk; 303, the rotating shaft; 304, the swing rod; 305, the connecting block; 306, the first chute; 307, the second chute; 308, the first shift lever; 309, the second shift lever; 310, the outer shell; 40, the extension mechanism; 401, the rotating rod; 402, the extension rod; 403, the first spring; 404, the rocker; 405, the receiving groove; 406, the dial; 407, the clamping plate; 408, the metal elastic sheet; 409, the card slot; 50, the support mechanism; 501, the grip; 502, the support plate; 503, the arc-shaped clamping plate; 504, the U-shaped connecting piece; 505, the circular ring; 60, the positioning mechanism; 601, the disk; 602, the limiting block; 603, the connecting shaft; 604, the groove; 605, the L-shaped connecting rod; 606, the trapezoidal block; 607, the first moving rod; 608, the second spring; 609, the pressing block; 70, the locking mechanism; 701, the connecting rod; 702, the second moving rod; 703, the moving block; 704, the U-shaped block; 705, the third chute. Detailed implementation manners

[0036] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Apparently, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0037] The following further describes the present invention with reference to the embodiments.

[0038] Refer to Figures 1 to 12 , a manual negative pressure sputum aspirator in this embodiment includes a sputum aspirator body 10. A suction pull rod 20 for driving the sputum aspirator body 10 to work is fixedly connected to the rear of the sputum aspirator body 10. A rotating mechanism 30 for driving the suction pull rod 20 to reciprocate is arranged outside the suction pull rod 20. An extension mechanism 40 for saving effort is arranged on the side of the sputum aspirator body 10. A support mechanism 50 for keeping the suction pull rod 20 working stably is arranged at the bottom of the sputum aspirator body 10. A positioning mechanism 60 for keeping the inclination angle of the sputum aspirator body 10 is arranged in the middle of the support mechanism 50.

[0039] The rotating mechanism 30 includes a housing 310 symmetrically and fixedly connected to the outside of the sputum aspirator body 10. A Y-shaped bracket 301 is fixedly connected between the two housings 310. The top of the Y-shaped bracket 301 is slidably connected to the suction rod 20. A swing rod 304 is rotatably connected to the side of the Y-shaped bracket 301. The top of the swing rod 304 is fixedly connected to a second lever 309. A connecting block 305 is fixedly connected to the side of the suction rod 20. A second chute 307 is formed on the surface of the connecting block 305. The second lever 309 slides in the second chute 307. A locking mechanism 70 for preventing the rotating mechanism 30 from working is further provided inside the two housings 310.

[0040] The rotating mechanism 30 further includes a rotating shaft 303 rotatably connected to the middle of the Y-shaped bracket 301. One end of the rotating shaft 303 is fixedly connected to a rotating disk 302. The other end of the rotating shaft 303 extends outside the housing 310. A first lever 308 is fixedly connected to the end of the rotating disk 302 away from the rotating shaft 303. A first chute 306 is formed in the middle of the swing rod 304. The first lever 308 slidably penetrates through the first chute 306, and the first lever 308 is slidably connected to the swing rod 304. The rotating shaft 303 and the rotating disk 302 are concentrically connected, and the rotating disk 302 and the first lever 308 are eccentrically connected.

[0041] During specific operation, when using the sputum aspirator, the rotating shaft 303 drives the rotating disk 302 to rotate. The rotating disk 302 drives the first lever 308 to rotate. The rotating first lever 308 drives the swing rod 304 to swing reciprocally. When the swing rod 304 swings reciprocally, the bottom of the swing rod 304 rotates with the Y-shaped bracket 301, and the top of the swing rod 304 drives the second lever 309 to swing reciprocally synchronously. The second lever 309 drives the suction rod 20 to move horizontally reciprocally through the connecting block 305, thereby realizing the pumping of the sputum aspirator body 10 to generate negative pressure, converting the relatively small force of hand rotation into a relatively large stroke pulling force of the rod, greatly reducing the physical strength required for a single operation, reducing the fatigue degree of operation. The rotating mechanism 30 ensures that the stroke of each reciprocating movement of the rod is consistent through mechanical limit, avoiding the problem of unstable negative pressure caused by uneven force when directly pulled manually, maintaining a more stable negative pressure, and reducing the attraction fluctuation.

[0042] The extension mechanism 40 includes a rotating rod 401. One end of the rotating rod 401 is fixedly connected to the end of the rotating shaft 303 away from the rotating disk 302. A telescopic rod 402 is slidably connected in the cavity at one end of the rotating rod 401. A first spring 403 is fixedly connected between the telescopic rod 402 and the cavity of the rotating rod 401. A rocker 404 is rotatably connected to the end of the telescopic rod 402 away from the rotating rod 401.

[0043] The extension mechanism 40 also includes a receiving groove 405 opened on the side of the extension rod 402, and a card plate 407 is arranged inside the receiving groove 405. The card plate 407 is rotatably connected to the extension rod 402, and a through hole is opened on the side of the receiving groove 405 for the top of the card plate 407 to move to the outside of the receiving groove 405. A metal spring 408 is tightly fitted on the side of the card plate 407, and the end of the metal spring 408 away from the card plate 407 is fixedly connected to the extension rod 402, and a card groove 409 matching the top of the card plate 407 is opened on the side of the cavity of the rotating rod 401, and a dial plate 406 for driving the card plate 407 to rotate is fixedly connected to the bottom of the rocker 404, and an inclined surface is opened on the top of the card plate 407.

[0044] During specific operation, when driving the rotating shaft 303 to rotate, first, it is necessary to rotate the rocker 404. When the rocker 404 rotates, the card plate 407 is driven to rotate through the dial plate 406, and the top of the rotating card plate 407 is disengaged from the card slot 409. At this time, the top of the card plate 407 completely enters the accommodating slot 405, and the extension rod 402 is pushed out from the cavity of the rotating rod 401 under the elastic force of the first spring 403, thereby extending the length of the rotating rod 401, and then continue to drive the rotating rod 401 and the extension rod 402 to rotate through the rocker 404, thereby driving the rotating shaft 303 to rotate, and the extension rod 402 is ejected from the cavity of the rotating rod 401. The essence is to increase the length of the lever arm. The long lever arm allows the operator to use a large joint to replace the small muscle groups of the wrist or fingers that the traditional pull rod relies on, delaying fatigue accumulation and further improving operational stability.

[0045] When the suction pump is not in use, the extension rod 402 is directly pushed into the cavity of the rotating rod 401. When the inclined surface of the top of the card plate 407 contacts the side wall of the cavity of the rotating rod 401, the top of the card plate 407 is pushed into the accommodating groove 405, and then the extension rod 402 enters and is pushed into the cavity of the rotating rod 401. When the top of the card plate 407 moves to the side of the card slot 409, the metal spring 408 pushes the card plate 407 to rotate, and the top of the card plate 407 enters the card slot 409 to fix the extension rod 402 and store the suction pump.

[0046] The support mechanism 50 includes a handle 501 fixedly connected to the side of the shell 310, a circular ring 505 is fixedly connected to the bottom of the handle 501, a U-shaped connector 504 is rotatably connected to the middle of the circular ring 505, a support plate 502 is fixedly connected to the side of the U-shaped connector 504, and an arc-shaped clamping plate 503 is symmetrically fixedly connected to the side of the support plate 502.

[0047] During specific operation, when using the suction apparatus, the operator holds the grip 501 with the right hand, presses the support plate 502 tightly against the bottom of the arm, and clamps the support plate 502 to the bottom of the arm by using the arc-shaped clamping plate 503, which can provide an additional support point, thereby improving the stability of the whole device. This design allows part of the operator's weight to be transferred to the arm and the arc-shaped clamping plate 503, rather than relying entirely on the wrist and fingers to maintain the position of the suction apparatus, thus effectively reducing the fatigue of the hand and wrist during long-term operation.

[0048] The positioning mechanism 60 includes discs 601 symmetrically and fixedly connected to the sides of the U-shaped connecting member 504. A plurality of limiting blocks 602 are fixedly connected to one side of the two discs 601 close to each other. A connecting shaft 603 is also rotatably connected to one side of the two discs 601 close to each other. The two connecting shafts 603 extend into the inner ring of the ring 505 and are rotatably connected to the ring 505. Grooves 604 are formed on both sides of the ring 505, and the grooves 604 are matched with the limiting blocks 602.

[0049] The positioning mechanism 60 further includes a first moving rod 607 slidably connected in the cavity of the grip 501. The bottom of the first moving rod 607 slidably penetrates through the ring 505 and extends into the inner ring of the ring 505. L-shaped connecting rods 605 are fixedly connected to one end of the two connecting shafts 603 close to each other. The two L-shaped connecting rods 605 are arranged in a staggered manner. A trapezoidal block 606 is fixedly connected to the extended end of the bottom of the first moving rod 607. The inclined surfaces on both sides of the trapezoidal block 606 are slidably connected to the sides of the two L-shaped connecting rods 605 respectively.

[0050] A second spring 608 is sleeved outside the first moving rod 607. One end of the second spring 608 is fixedly connected to the protrusion outside the first moving rod 607, and the other end of the second spring 608 is fixedly connected to the inner wall of the cavity of the grip 501. An arc-shaped pressing block 609 is rotatably connected to the side of the grip 501. The arc-shaped side of the pressing block 609 is slidably connected to the top of the first moving rod 607.

[0051] During specific operation, after the arc-shaped splint 503 clamps the outside of the operator's arm, when the operator holds the grip 501 with the right hand, the operator's right palm does not squeeze the pressing block 609 first. At this time, the suction device body 10 can be directly rotated. The suction device body 10 can drive the grip 501 to rotate, so as to adjust the inclination angle of the suction device body 10. After adjusting the inclination angle of the suction device body 10, the operator's right palm squeezes the pressing block 609. The arc-shaped side of the pressing block 609 pushes the first moving rod 607 downward. The downward moving first moving rod 607 synchronously pushes the trapezoidal block 606 downward, and at the same time compresses and stores energy in the second spring 608. The two inclined surfaces of the trapezoidal block 606 simultaneously squeeze the two L-shaped connecting rods 605. The two L-shaped connecting rods 605 pull the opening of the U-shaped connecting piece 504 to deform through the connecting shaft 603, so that the opening of the U-shaped connecting piece 504 becomes narrower. The narrowed opening of the U-shaped connecting piece 504 allows the limiting block 602 on the side of the disc 601 to enter the groove 604 on the side of the ring 505, thereby realizing the fixation of the inclination angle of the suction device body 10. The stable angle reduces the risk of injury caused by unstable hands or accidental movement, protects the safety of the patient. At the same time, for the operator, it also reduces the fatigue caused by holding for a long time, and further reduces the possibility of operation errors.

[0052] When the suction device is not in use, release the pressing block 609. Under the elastic force of the second spring 608, the first moving rod 607 resets upward. The first moving rod 607 drives the trapezoidal block 606 to reset synchronously upward. Without the extrusion of the L-shaped connecting rod 605, the U-shaped connecting piece 504 returns to its normal shape. At this time, the limiting block 602 on the side of the disc 601 disengages from the groove 604 of the ring 505, and then the inclination angle of the suction device body 10 can be adjusted by continuing to rotate it.

[0053] The locking mechanism 70 includes a connecting rod 701 fixedly connected to the side of the first moving rod 607. One end of the connecting rod 701 away from the first moving rod 607 is fixedly connected to a second moving rod 702. The top of the second moving rod 702 extends upward to the top of the grip 501, and the second moving rod 702 is slidably connected to the grip 501.

[0054] The locking mechanism 70 further includes a third sliding groove 705 opened on the side of the housing 310. A moving block 703 is slidably connected in the third sliding groove 705. One end of the moving block 703 is fixedly connected to the side of the top of the second moving rod 702. The other end of the moving block 703 penetrates through the third sliding groove 705 and extends to the side of the swing rod 304. An inverted U-shaped block 704 is fixedly connected to the side of the swing rod 304, and the end of the moving block 703 away from the second moving rod 702 is inserted into the middle of the U-shaped block 704.

[0055] During specific operation, after the operator squeezes the pressing block 609 with the right palm, the first moving rod 607 drives the second moving rod 702 to move downward synchronously through the connecting rod 701. At this time, the moving block 703 on the side of the second moving rod 702 disengages from the inverted U-shaped block 704. Since the U-shaped block 704 is fixedly connected to the swing rod 304, after the moving block 703 disengages from the inverted U-shaped block 704, the fixed restriction of the swing rod 304 is released, and then the swing rod 304 can be driven to swing reciprocally by the rotating mechanism 30.

[0056] When the suction device is not in use, when the first moving rod 607 resets upward, it drives the second moving rod 702 to move upward and reset synchronously through the connecting rod 701. The second moving rod 702 drives the moving block 703 upward to re-enter the inverted U-shaped block 704, thereby fixing the swing rod 304 and restricting the reciprocating movement of the swing rod 304. This can prevent the accidental activation of the suction function when the medical staff adjusts the angle of the suction device, avoiding unnecessary stimulation or harm to the patient's respiratory tract due to misoperation or unstable hands.

[0057] Working principle:

[0058] When using the suction device, first, the supporting mechanism 50 supports the suction device body 10 at the operator's right arm. Then, the operator does not tightly hold the grip 501 with the right hand first. After adjusting the inclination angle of the suction device body 10, the operator tightly holds the grip 501 with the right hand to drive the positioning mechanism 60 to fix the inclination angle of the suction device body 10. At the same time, the positioning mechanism 60 drives the locking mechanism 70 to release the restriction on the rotating mechanism 30. Then, the operator turns the rocker 404 with the left hand to make the extension rod 402 in the extension mechanism 40 pop out, extending the length of the rotating rod 401. The extension mechanism 40 drives the rotating mechanism 30 to drive the suction pull rod 20 to reciprocate to drive the suction device body 10 to work.

[0059] When the suction device is not in use, the operator releases the grip 501. The positioning mechanism 60 releases the fixation of the inclination angle of the suction device body 10. At the same time, the positioning mechanism 60 drives the locking mechanism 70 to lock the rotating mechanism 30 to prevent the rotating mechanism 30 from driving the suction pull rod 20 to work, and directly retracts the extension rod 402 into the cavity of the rotating rod 401.

[0060] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features; and these modifications or replacements will not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A manual negative pressure sputum suction device, characterized in that: The sputum suction device comprises a sputum suction device body (10), a suction rod (20) for driving the sputum suction device body (10) to work is fixedly connected to the rear of the sputum suction device body (10), a rotating mechanism (30) for driving the suction rod (20) to move back and forth is arranged outside the suction rod (20), an extension mechanism (40) for saving effort is arranged on the side of the sputum suction device body (10), a supporting mechanism (50) for maintaining the stable operation of the suction rod (20) is arranged at the bottom of the sputum suction device body (10), and a positioning mechanism (60) for maintaining the inclination angle of the sputum suction device body (10) is arranged in the middle of the supporting mechanism (50); The rotating mechanism (30) includes a shell (310) symmetrically fixedly connected to the outside of the suction device body (10), a Y-shaped bracket (301) is fixedly connected between the two shells (310), the top of the Y-shaped bracket (301) is slidably connected to the suction rod (20), and the side of the Y-shaped bracket (301) is rotatably connected to a swing rod (304), and a locking mechanism (70) for preventing the rotating mechanism (30) from working is also arranged inside the two shells (310).

2. A manual negative pressure sputum suction device according to claim 1, characterized in that: The rotating mechanism (30) also includes a rotating shaft (303) rotatably connected to the middle part of the Y-shaped bracket (301), one end of the rotating shaft (303) is fixedly connected to a rotating disk (302), and the other end of the rotating shaft (303) extends to the outside of the shell (310), and the rotating disk (302) is fixedly connected to one end away from the rotating shaft (303) with a first lever (308), and a first sliding groove (306) is opened in the middle part of the swing rod (304), the first lever (308) slides through the first sliding groove (306), and the first lever (308) is slidably connected to the swing rod (304), and a second lever (309) is fixedly connected to the top of the swing rod (304), and a connecting block (305) is fixedly connected to the side of the suction pull rod (20), and a second sliding groove (307) is opened on the surface of the connecting block (305), and the second lever (309) slides in the second sliding groove (307).

3. A manual negative pressure sputum suction device according to claim 2, characterized in that: The extending mechanism (40) comprises a rotating rod (401), one end of the rotating rod (401) is fixedly connected to one end of the rotating shaft (303) away from the rotating disk (302), an extension rod (402) is slidably connected in a cavity at one end of the rotating rod (401), a first spring (403) is fixedly connected between the extension rod (402) and the cavity of the rotating rod (401), and one end of the extension rod (402) away from the rotating rod (401) is rotatably connected to a rocker (404).

4. A manual negative pressure sputum suction device according to claim 3, characterized in that: The extension mechanism (40) further comprises a receiving groove (405) provided on the side of the extension rod (402), a card plate (407) being arranged inside the receiving groove (405), the card plate (407) being rotatably connected to the extension rod (402), and a through hole for allowing the top of the card plate (407) to move to the outside of the receiving groove (405) being provided on the side of the receiving groove (405), a metal spring sheet (408) being tightly fitted on the side of the card plate (407), and the end of the metal spring sheet (408) away from the card plate (407) being fixedly connected to the extension rod (402), a card groove (409) matching with the top of the card plate (407) being provided on the side of the cavity of the rotating rod (401), and a dial plate (406) for driving the card plate (407) to rotate being fixedly connected to the bottom of the rocker (404).

5. A manual negative pressure sputum suction device according to claim 1, characterized in that: The support mechanism (50) comprises a handle (501) fixedly connected to the side of the housing (310), a circular ring (505) fixedly connected to the bottom of the handle (501), a U-shaped connecting piece (504) rotatably connected to the middle of the circular ring (505), a support plate (502) fixedly connected to the side of the U-shaped connecting piece (504), and an arc-shaped clamping plate (503) symmetrically fixedly connected to the side of the support plate (502).

6. A manual negative pressure sputum suction device according to claim 5, characterized in that: The positioning mechanism (60) comprises a disk (601) symmetrically fixedly connected to the side of the U-shaped connecting member (504); a plurality of limit blocks (602) are fixedly connected to the sides of the two disks (601) close to each other; a connecting shaft (603) is rotatably connected to the sides of the two disks (601) close to each other; the two connecting shafts (603) extend into the inner ring of the ring (505) and are rotatably connected to the ring (505); grooves (604) are provided on both sides of the ring (505); and the grooves (604) match the limit blocks (602) with each other.

7. A manual negative pressure sputum suction device according to claim 6, characterized in that: The positioning mechanism (60) also includes a first movable rod (607) slidably connected in the cavity of the handle (501), the bottom of the first movable rod (607) slides through the ring (505) and extends to the inner circle of the ring (505), the two connecting shafts (603) are close to each other and are fixedly connected with an L-shaped connecting rod (605) at one end, the two L-shaped connecting rods (605) are arranged in an alternating manner, the bottom extended end of the first movable rod (607) is fixedly connected with a trapezoidal block (606), and the inclined surfaces on both sides of the trapezoidal block (606) are respectively slidably connected to the side surfaces of the two L-shaped connecting rods (605).

8. A manual negative pressure sputum suction device according to claim 7, characterized in that: A second spring (608) is sleeved on the outside of the first moving rod (607), one end of the second spring (608) is fixedly connected to the external protrusion of the first moving rod (607), and the other end of the second spring (608) is fixedly connected to the inner wall of the cavity of the handle (501). The side of the handle (501) is rotatably connected to a circular arc-shaped pressing block (609), and the arc-shaped side surface of the pressing block (609) is slidably connected to the top of the first moving rod (607).

9. A manual negative pressure sputum suction device according to claim 1, characterized in that: The locking mechanism (70) comprises a connecting rod (701) fixedly connected to the side of the first moving rod (607); one end of the connecting rod (701) away from the first moving rod (607) is fixedly connected to a second moving rod (702); the top of the second moving rod (702) extends upward to the top of the handle (501), and the second moving rod (702) is slidably connected to the handle (501).

10. A manual negative pressure sputum suction device according to claim 9, characterized in that: The locking mechanism (70) further comprises a third slide groove (705) provided on the side of the housing (310), a moving block (703) being slidably connected in the third slide groove (705), one end of the moving block (703) being fixedly connected to the top side of the second moving rod (702), the other end of the moving block (703) passing through the third slide groove (705) and extending to the side of the swing rod (304), an inverted U-shaped block (704) being fixedly connected to the side of the swing rod (304), and the moving block (703) is inserted into the middle of the U-shaped block (704) away from one end of the second moving rod (702).

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