A saliva suction tube

Abstract

The present invention discloses a saliva suction tube, which relates to the technical field of oral medical auxiliary instruments and includes a saliva suction negative pressure pipeline assembly, a joint mechanism, a saliva suction end mechanism, a saliva anti-backflow mechanism and a negative pressure tube protection mechanism. The saliva suction negative pressure pipeline assembly includes a deformable negative pressure tube, a connecting ring, a rigid connecting pipe and a negative pressure interface. The top of the deformable negative pressure tube bends to the left and is connected to one end of the rigid connecting pipe through the connecting ring. A negative pressure interface is arranged at the bottom end of the deformable negative pressure tube; the joint mechanism is installed at the end of the rigid connecting pipe away from the connecting ring; the saliva suction end mechanism includes a saliva suction head, a middle saliva suction anti-blocking component and a side saliva suction anti-blocking component. This saliva suction tube can avoid sucking the oral mucosa and causing oral mucosa bleeding. When the saliva suction tube is hung on the corner of the patient's mouth, the corner limit protection mechanism can reduce the discomfort of the patient, and it can avoid the dripping of saliva and blood during the process of taking out the saliva suction tube from the oral cavity after use.

Description

Technical Field

[0001] The present invention relates to the technical field of oral medical auxiliary instruments, and specifically relates to a saliva suction tube. Background Art

[0002] Currently, in the stomatology department, during various dental surgeries on patients' oral cavities, doctors usually need to use a saliva suction tube to extend into the patients' oral cavities to suck away saliva and blood in the oral cavities, so as to avoid the interference of saliva and blood with dental surgeries;

[0003] After the existing saliva suction tube is placed in the oral cavity and then connected to an external negative pressure source, the saliva and blood in the patients' oral cavities can be sucked away through the saliva suction tube. The end of the saliva suction tube will suck the oral mucosa in the oral cavity, which is likely to cause bleeding of the oral mucosa. Moreover, when the saliva suction tube hangs at the corner of the patient's mouth for a long time, it will also cause discomfort at the corner of the patient's mouth. During the process of taking out the saliva suction tube from the oral cavity after use, the residual saliva and blood in the saliva suction tube are also likely to drip, affecting the surrounding hygiene. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to overcome the existing defects and provide a saliva suction tube that can avoid sucking the oral mucosa and causing bleeding of the oral mucosa. The deformable negative pressure tube can be bent into the required shape according to needs, with better adaptability to the corner of the patient's mouth. The transparent rubber tube can protect the deformable negative pressure tube, increase the contact area between the deformable negative pressure tube and the surrounding of the patient's oral cavity, and facilitate the doctor to manipulate and bend the deformable negative pressure tube. When the saliva suction tube hangs at the corner of the patient's mouth, the corner limit protection mechanism can reduce the discomfort of the patient, and during the process of taking out the saliva suction tube from the oral cavity after use, it can avoid the dripping of saliva and blood, making it more hygienic and convenient to use, and can effectively solve the problems in the background art.

[0005] To achieve the above object, the present invention provides the following technical solution: A saliva suction tube, comprising:

[0006] A saliva suction negative pressure pipeline assembly, including a deformable negative pressure tube, a connecting ring, a rigid connecting tube, and a negative pressure interface. The top of the deformable negative pressure tube bends to the left and is connected to one end of the rigid connecting tube through the connecting ring. The bottom end of the deformable negative pressure tube is provided with a negative pressure interface;

[0007] A joint mechanism, installed at the end of the rigid connecting tube away from the connecting ring;

[0008] A saliva suction end mechanism, including a saliva suction head, a middle saliva suction anti-blocking component, and a side saliva suction anti-blocking component. The saliva suction head is a cylindrical structure with one end closed and the other end provided with a circular opening. The middle of the closed end of the saliva suction head is provided with a middle saliva suction anti-blocking component, and the circular opening of the saliva suction head is connected to the end of the joint mechanism away from the rigid connecting tube;

[0009] A saliva anti-backflow mechanism, installed inside the saliva suction head and the joint mechanism;

[0010] The negative pressure tube protection mechanism is sleeved on the outside of the deformable negative pressure tube, and the end of the negative pressure tube protection mechanism is connected to the outside of the joint mechanism.

[0011] The deformable negative pressure tube is made of a deformable thin metal tube. The bent part of the deformable negative pressure tube is convenient for hanging on the corner of the patient's mouth. The negative pressure tube protection mechanism is used to protect the deformable negative pressure tube, and can also increase the area between the deformable negative pressure tube and the patient's oral cavity, avoiding the appearance of indentations around the patient's oral cavity caused by the deformable negative pressure tube. At the same time, the doctor can also more conveniently bend the deformable negative pressure tube as needed with the help of the negative pressure tube protection mechanism. The connecting ring connects the deformable negative pressure tube and the rigid connecting tube. The joint mechanism is used to connect the rigid connecting tube and the saliva suction head, and is also used to install the saliva anti-backflow mechanism. Among them, the rigid connecting tube will not deform. The negative pressure interface is connected to an external negative pressure source, such as a saliva suction device. The saliva suction device makes the inside of the saliva suction head in a negative pressure state through the saliva suction negative pressure pipeline assembly and the joint mechanism. The saliva suction head can suck the saliva and blood in the patient's oral cavity through the middle saliva suction anti-blocking component and the side saliva suction anti-blocking component. When the dental operation is over, the saliva suction device is turned off, and the saliva anti-backflow mechanism can seal the middle saliva suction anti-blocking component and the side saliva suction anti-blocking component to avoid the dripping of the remaining saliva and blood in the saliva suction head, making it more hygienic to use.

[0012] Furthermore, the joint mechanism includes a joint pipe sleeve, an external thread sleeve, a tapered portion, a throat portion, and a support mounting sleeve. One end of the joint pipe sleeve is integrally formed and connected with the external thread sleeve, and the outside of the external thread sleeve is threadedly connected with the inner side of the end of the rigid connecting tube away from the connecting ring. The other end of the joint pipe sleeve is integrally formed and connected with one end of the tapered portion, the other end of the tapered portion is integrally formed and connected with one end of the throat portion, and the other end of the throat portion is integrally formed and connected with one end of the support mounting sleeve. A tapered cavity is provided in the middle of the inner side of the support mounting sleeve. The outer peripheral side of the other end of the support mounting sleeve is threadedly connected with the inner side of the circular opening of the saliva suction head. The joint mechanism is composed of a support mounting sleeve, a throat portion, a tapered portion, a joint pipe sleeve, and an external thread sleeve arranged in sequence from left to right. Among them, the diameter of the tapered portion near one end of the throat portion is smaller than that of the other end, and the diameter of the tapered cavity near one end of the throat portion is smaller than that of the other end. The joint mechanism detachably connects the rigid connecting tube and the saliva suction head together.

[0013] Furthermore, the central saliva suction anti-blocking component includes a central saliva suction round hole and an anti-blocking groove. A central saliva suction round hole is provided in the middle of the closed end of the saliva suction head. Six anti-blocking grooves are annularly arrayed at the closed end of the saliva suction head, and the six anti-blocking grooves are all communicated with the end of the central saliva suction round hole. When the bent part of the deformable negative pressure tube hangs on the corner of the patient's mouth and the saliva suction head is located at the bottom of the oral cavity, the inside of the saliva suction head is in a negative pressure state. Blood or saliva at the bottom of the oral cavity can be sucked into the saliva suction head through the central saliva suction round hole, and then taken away through the joint mechanism and the deformable negative pressure tube. The anti-blocking groove is provided to prevent the outer end of the central saliva suction round hole from being blocked when it abuts against the oral mucosa, and to prevent the negative pressure inside the saliva suction head from sucking through the central saliva suction round hole and breaking the oral mucosa. When the outer end of the central saliva suction round hole abuts against the oral mucosa, the central saliva suction round hole can still suck blood or saliva in the oral cavity through the anti-blocking groove. Even if there is no blood or saliva, the central saliva suction round hole can also suck air through the anti-blocking groove, thereby preventing the central saliva suction round hole from breaking the cavity mucosa.

[0014] Furthermore, the side saliva suction anti-blocking component includes an anti-blocking arc groove, a side saliva suction round hole and an inclined groove. Six anti-blocking arc grooves are annularly arrayed on the outer peripheral side of the saliva suction head. Two side saliva suction round holes are respectively provided at the positions corresponding to both ends of each anti-blocking arc groove on the side surface of the saliva suction head. The six anti-blocking arc grooves are respectively arranged corresponding to the six anti-blocking grooves, and each anti-blocking arc groove is communicated with the corresponding anti-blocking groove through an inclined groove. The saliva suction head can suck saliva or blood in the oral cavity through the side saliva suction round hole, increasing the positions for sucking saliva or blood. The function of the anti-blocking arc groove is the same as that of the anti-blocking groove, preventing the side saliva suction round hole from sucking and breaking the oral mucosa and causing bleeding when it abuts against the oral mucosa. The inclined groove connects the anti-blocking arc groove and the anti-blocking groove, facilitating the rapid entry of saliva or blood in the oral cavity into the anti-blocking groove and the anti-blocking arc groove, and thus being quickly sucked into the saliva suction head through the central saliva suction round hole or the side saliva suction round hole.

[0015] Furthermore, the saliva backflow prevention mechanism includes a spoke rod, a limiting ring, a prism rod, a spring, a conical plug, a cylinder and a round hole plug. The inner side of one end of the hard pipe close to the saliva suction head is connected to the limiting ring through a plurality of spoke rods. The limiting ring is located at the center of the end of the hard pipe. The prism rod is slidably connected in the limiting ring. One end of the prism rod extends into the conical part and is connected to one end of the cylinder. The other end of the cylinder extends into the saliva suction head and is fixedly connected to the round hole plug. The round hole plug is arranged corresponding to the inner end of the central saliva suction circular hole. The part of the prism rod located in the conical part is fixedly sleeved with the conical plug, and the part of the prism rod located between the conical plug and the limiting ring is sleeved with a spring. The elastic force of the spring pushes the conical plug into the conical part, and the prism bar moves relative to the limit ring. The left end of the conical plug blocks the throat, and at the same time, the cylinder drives the round hole plug to block the central suction hole. When the deformation negative pressure tube is in a negative pressure state, the conical plug overcomes the elastic force of the spring, drives the prism bar and the cylinder to move right, and the conical plug moves right to open the throat, and the round hole plug also opens the central suction hole as the cylinder moves right. At this time, the negative pressure state in the deformation negative pressure tube also puts the joint mechanism and the suction head in a negative pressure state, and the suction head passes through the central suction hole. The saliva circular hole can absorb saliva and blood in the patient's mouth. When the external suction device stops working, the spring returns to its original position and stretches, pushing the conical plug, the ridged rod and the cylinder to move left relative to the limit ring. The conical plug completely enters the conical part and blocks the throat. The round hole plug blocks the central saliva suction hole as the cylinder moves left, which can prevent the saliva and blood in the deformed negative pressure tube from flowing back into the saliva suction head through the throat, and can also prevent the saliva and blood remaining in the saliva suction head from dripping out through the central saliva suction hole, thereby improving hygiene.

[0016] Furthermore, the saliva backflow prevention mechanism also includes a particle retaining ring, an oblique connecting rod, a movable cylinder and a side hole. The inner side of the saliva suction head is slidably connected to the movable cylinder, and the inner side of the closed end of the saliva suction head is fixedly connected to the particle retaining ring. The outer side of the particle retaining ring is slidably connected to the inner side of the end of the movable cylinder. The movable cylinder is provided with a side hole at the position corresponding to the side saliva suction circular hole, and the end of the movable cylinder close to the edge rod is connected to the cylinder through two oblique connecting rods. The movable cylinder moves left and right with the cylinder through the oblique connecting rod. When the spring pushes the conical plug, the rib rod and the cylinder to move left relative to the limiting ring, the left end of the movable cylinder abuts against the inside of the closed end of the saliva suction head. At this time, the side hole on the movable cylinder is staggered with the side saliva suction circular hole. When the conical plug, the rib rod and the cylinder move right relative to the limiting ring, the side hole on the movable cylinder corresponds to the side saliva suction circular hole. At this time, the saliva suction head is in a negative pressure state. The saliva suction head can absorb saliva and blood in the oral cavity through the side holes and the side saliva suction circular holes. When the external liquid suction device stops working, the spring resets and rebounds to extend, pushing the conical plug, the rib rod and the cylinder to move left relative to the limiting ring, and the movable cylinder moves left relative to the saliva suction head. The side hole on the movable cylinder is staggered with the side saliva suction circular hole, and the saliva and blood remaining in the saliva suction head will not drip outward through the side holes and the side saliva suction circular hole. The setting of the particle retaining ring prevents some surgical debris in the saliva and blood from entering the space at the left end of the movable cylinder, so as to prevent these surgical debris from affecting the left movement of the movable cylinder relative to the saliva suction head.

[0017] Further, the saliva anti-backflow mechanism further includes a conical filter screen. The cylindrical body is fixedly sleeved with the conical filter screen, and the edge of the end of the conical filter screen is connected to the end of the movable cylinder. The conical filter screen can filter surgical debris, prevent the surgical debris from entering the joint mechanism and the deformable negative pressure tube to cause blockage, and also prevent the surgical debris from affecting the smooth blocking of the left end of the conical plug to the laryngeal orifice.

[0018] Further, the negative pressure tube protection mechanism includes a transparent rubber tube, a convex ring, an annular groove, an elastic ring, a plug sleeve and a control sleeve. A convex ring is integrally formed and connected to the outer peripheral side of one end of the support mounting sleeve close to the laryngeal orifice. A transparent rubber tube is sleeved outside the deformable negative pressure tube. An inner ring groove corresponding to the convex ring is provided on the inner side of one end of the transparent rubber tube close to the saliva suction head. An annular groove is provided on the outer side of one end of the transparent rubber tube close to the saliva suction head. The annular groove is located between the saliva suction head and the annular groove, and an elastic ring is installed in the annular groove. A plug sleeve is sleeved outside the end of the deformable negative pressure tube away from the saliva suction head. The outer side of the plug sleeve is sleeved with the inner side of one end of the transparent rubber tube away from the saliva suction head, and a control sleeve is integrally formed and connected to the outer end of the plug sleeve.

[0019] Since the deformable negative pressure tube is a thin metal tube, direct contact with the patient's mouth corner or around the oral cavity will cause discomfort to the patient and is also prone to form deep indentations. Therefore, setting the transparent rubber tube can increase the contact area with the patient's mouth corner or around the oral cavity, increase the comfort of the patient during use, and at the same time, the doctor can better hold the deformable negative pressure tube with the help of the transparent rubber tube, so as to bend the deformable negative pressure tube into the required shape, make the deformable negative pressure tube better hang on the patient's mouth corner, and at the same time not interfere with the surgical process. The cooperation of the convex ring and the inner ring groove makes the support mounting sleeve and the transparent rubber tube better connected. The elastic ring is used to firmly sleeve the transparent rubber tube on the support mounting sleeve to prevent the support mounting sleeve from separating from the transparent rubber tube. And a chamfer is provided on the inner side of the left end of the transparent rubber tube, making it easier to sleeve the transparent rubber tube on the support mounting sleeve during assembly, and the left end of the transparent rubber tube abuts against the right end of the saliva suction head.

[0020] Further, it further includes a mouth corner limit protection mechanism. The mouth corner limit protection mechanism includes a protection cushion, a mouth corner platform, limit protrusions and mounting collar rings. An arc-shaped protection cushion is provided at the bottom of the bent part of the deformable negative pressure tube. Two mounting collar rings are integrally formed and connected to both ends of the protection cushion respectively. Both mounting collar rings are sleeved on the outer side of the transparent rubber tube. A mouth corner platform is provided at the bottom of the protection cushion, and two limit protrusions are integrally formed and connected to both ends of the bottom of the protection cushion respectively. The mouth corner platform makes the protection cushion better rest on the patient's mouth corner. The protection cushion makes the patient's mouth corner more comfortable. The mounting collar rings are used to stably mount the protection cushion on the transparent rubber tube. The limit of the limit protrusions makes the bent part of the deformable negative pressure tube and the transparent rubber tube more stably hang on the mouth corner.

[0021] Further, it further includes a side saliva suction round hole blocking mechanism, and the side saliva suction round hole blocking mechanism includes a blocking rubber sleeve, a blocking rubber strip and a saliva suction through groove. The inner diameter of the blocking rubber sleeve is the same as the outer diameter of the saliva suction head, and three blocking rubber strips are arranged at equal angles on the inner top of the blocking rubber sleeve. The three blocking rubber strips are respectively arranged corresponding to the three anti-blocking arc grooves on the top of the saliva suction head. Three saliva suction through grooves are equally angled at the bottom of the blocking rubber sleeve, and the three saliva suction through grooves are respectively arranged corresponding to the three anti-blocking arc grooves at the bottom of the saliva suction head. When the negative pressure in the saliva suction head is insufficient or the saliva and blood in the oral cavity cannot submerge the middle part of the saliva suction head, the blocking rubber sleeve can be sleeved on the saliva suction head, and the three blocking rubber strips on the blocking rubber sleeve are used to block the three anti-blocking arc grooves on the top of the saliva suction head, so that the negative pressure in the saliva suction head is concentrated to act through the central saliva suction round hole, the three anti-blocking arc grooves at the bottom and the side saliva suction round holes at the bottom.

[0022] Compared with the prior art, the beneficial effects of this saliva suction tube are as follows:

[0023] 1. When the outer end of the central saliva suction round hole abuts against the oral mucosa, the central saliva suction round hole can still suck the blood or saliva in the oral cavity through the anti-blocking groove. Even if there is no blood or saliva, the central saliva suction round hole can also suck air through the anti-blocking groove, thus avoiding sucking and breaking the cavity mucosa by the central saliva suction round hole. The function of the anti-blocking arc groove is the same as that of the anti-blocking groove, avoiding sucking and breaking the oral mucosa and causing bleeding when the side saliva suction round hole abuts against the oral mucosa;

[0024] 2. The deformable negative pressure tube can be bent into the required shape according to needs, and has better adaptability to the patient's mouth corner. The setting of the transparent rubber tube can protect the deformable negative pressure tube, increase the contact area between the deformable negative pressure tube and the patient's oral cavity, and also facilitate the doctor to manipulate and bend the deformable negative pressure tube;

[0025] 3. The mouth corner platform enables the protective cushion to better rest on the patient's mouth corner, making the patient's mouth corner more comfortable. The installation collar is used to stably install the protective cushion on the transparent rubber tube. The limitation of the limit protrusion makes the bending part of the deformable negative pressure tube and the transparent rubber tube more stably hang on the mouth corner. Therefore, when the saliva suction tube hangs on the patient's mouth corner, the mouth corner limit protection mechanism can reduce the discomfort of the patient;

[0026] 4. Moreover, during the process of taking out the saliva suction tube from the oral cavity after use, it can avoid the dripping of saliva and blood, and is more hygienic and convenient to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic structural diagram of the saliva suction tube of the present invention;

[0028] Figure 2 For the saliva suction tube of the present invention Figure 1 The partial enlarged structural schematic diagram at A in it;

[0029] Figure 3Schematic cross-sectional structure diagram of the saliva suction tube of the present invention;

[0030] Figure 4 The saliva suction tube of the present invention Figure 3 Schematic diagram of the partially enlarged structure at position B in the saliva suction tube;

[0031] Figure 5 The saliva suction tube of the present invention Figure 3 Schematic diagram of the partially enlarged structure at position C in the saliva suction tube;

[0032] Figure 6 Schematic diagram of the partially enlarged structure of the saliva suction tube of the present invention;

[0033] Figure 7 Schematic diagram of the partially enlarged structure of the saliva anti-backflow mechanism in the saliva suction tube of the present invention;

[0034] Figure 8 Schematic diagram of the corner limit protection mechanism structure in the saliva suction tube of the present invention;

[0035] In the figure: 1 saliva suction negative pressure pipeline assembly, 11 deformed negative pressure pipe, 12 connecting ring, 13 rigid connecting pipe, 14 negative pressure interface, 2 joint mechanism, 21 joint pipe sleeve, 22 external thread sleeve, 23 conical part, 24 throat part, 25 support installation sleeve, 3 saliva suction end mechanism, 31 saliva suction head, 32 central saliva suction round hole, 33 anti-blocking groove, 34 anti-blocking arc groove, 35 side saliva suction round hole, 36 inclined groove, 4 saliva anti-backflow mechanism, 41 spoke rod, 42 limit ring, 43 ribbed rod, 44 spring, 45 conical plug, 46 cylinder, 47 round hole plug, 48 particle retaining ring, 49 inclined connecting rod, 410 conical filter screen, 411 movable cylinder, 412 side hole, 5 negative pressure pipe protection mechanism, 51 transparent rubber tube, 52 convex ring, 53 annular groove, 54 elastic ring, 55 plug sleeve, 56 control sleeve, 6 corner limit protection mechanism, 61 protection gasket, 62 oral corner platform, 63 limit protrusion, 64 installation sleeve ring, 7 side saliva suction round hole blocking mechanism, 71 blocking rubber sleeve, 72 blocking rubber strip, 73 saliva suction through groove. Detailed implementation manners

[0036] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0037] Embodiment 1, please refer to Figures 1 to 8 , this embodiment provides a technical solution: a saliva suction tube, including a saliva suction negative pressure pipeline assembly 1, a joint mechanism 2, a saliva suction end mechanism 3, a saliva anti-backflow mechanism 4 and a negative pressure pipe protection mechanism 5;

[0038] The saliva aspiration negative pressure pipeline assembly 1 includes a deformable negative pressure pipe 11, a connecting ring 12, a rigid connecting pipe 13 and a negative pressure interface 14. The top of the deformable negative pressure pipe 11 bends to the left and is connected to one end of the rigid connecting pipe 13 through the connecting ring 12. A negative pressure interface 14 is arranged at the bottom end of the deformable negative pressure pipe 11;

[0039] The joint mechanism 2 is installed at one end of the rigid connecting pipe 13 away from the connecting ring 12;

[0040] The saliva aspiration head mechanism 3 includes a saliva aspiration head 31, a middle saliva aspiration anti-blocking component and a side saliva aspiration anti-blocking component. The saliva aspiration head 31 is a cylindrical structure with one end closed and a circular opening at the other end. A middle saliva aspiration anti-blocking component is arranged in the middle of the closed end of the saliva aspiration head 31, and the circular opening of the saliva aspiration head 31 is connected to one end of the joint mechanism 2 away from the rigid connecting pipe 13;

[0041] The joint mechanism 2 includes a joint pipe sleeve 21, an external thread sleeve 22, a tapered part 23, a throat part 24 and a support mounting sleeve 25. One end of the joint pipe sleeve 21 is integrally formed and connected with the external thread sleeve 22. The outer side of the external thread sleeve 22 is threadedly connected with the inner side of one end of the rigid connecting pipe 13 away from the connecting ring 12. The other end of the joint pipe sleeve 21 is integrally formed and connected with one end of the tapered part 23. The other end of the tapered part 23 is integrally formed and connected with one end of the throat part 24. The other end of the throat part 24 is integrally formed and connected with one end of the support mounting sleeve 25. A tapered cavity is arranged in the middle of the inner side of the support mounting sleeve 25. The outer peripheral side of the other end of the support mounting sleeve 25 is threadedly connected with the inner side of the circular opening of the saliva aspiration head 31. The joint mechanism 2 is composed of the support mounting sleeve 25, the throat part 24, the tapered part 23, the joint pipe sleeve 21 and the external thread sleeve 22 arranged in sequence from left to right. The diameter of the tapered part 23 near one end of the throat part 24 is smaller than that of the other end, and the diameter of the tapered cavity near one end of the throat part 24 is smaller than that of the other end. The joint mechanism 2 detachably connects the rigid connecting pipe 13 and the saliva aspiration head 31 together.

[0042] The central saliva suction and anti-blocking assembly includes a central saliva suction round hole 32 and an anti-blocking groove 33. In the middle of the closed end of the saliva suction head 31, there is a central saliva suction round hole 32. Six anti-blocking grooves 33 are arranged in a circular array at the closed end of the saliva suction head 31. The six anti-blocking grooves 33 are all communicated with the end of the central saliva suction round hole 32. When the bent part of the deformable negative pressure tube 11 hangs on the corner of the patient's mouth and the saliva suction head 31 is located at the bottom of the oral cavity, the inside of the saliva suction head 31 is in a negative pressure state. Through the central saliva suction round hole 32, the blood or saliva at the bottom of the oral cavity can be sucked into the saliva suction head 31, and then taken away through the joint mechanism 2 and the deformable negative pressure tube 11. The setting of the anti-blocking groove 33 prevents the outer end of the central saliva suction round hole 32 from being blocked when it abuts against the oral mucosa, and avoids the negative pressure in the saliva suction head 31 sucking through the central saliva suction round hole 32 and breaking the oral mucosa. When the outer end of the central saliva suction round hole 32 abuts against the oral mucosa, the central saliva suction round hole 32 can still suck the blood or saliva in the oral cavity through the anti-blocking groove 33. Even if there is no blood or saliva, the central saliva suction round hole 32 can also suck air through the anti-blocking groove 33, thus avoiding the central saliva suction round hole 32 from breaking the cavity mucosa.

[0043] The side saliva suction and anti-blocking assembly includes an anti-blocking arc groove 34, a side saliva suction round hole 35 and an inclined groove 36. Six anti-blocking arc grooves 34 are arranged in a circular array on the outer peripheral side of the saliva suction head 31. At the positions corresponding to both ends of each anti-blocking arc groove 34 on the side surface of the saliva suction head 31, two side saliva suction round holes 35 are respectively arranged. The six anti-blocking arc grooves 34 are respectively arranged corresponding to the six anti-blocking grooves 33, and each anti-blocking arc groove 34 is respectively communicated with the corresponding anti-blocking groove 33 through the inclined groove 36. The saliva suction head 31 can suck the saliva or blood in the oral cavity through the side saliva suction round holes 35, increasing the positions for sucking saliva or blood. The function of the anti-blocking arc groove 34 is the same as that of the anti-blocking groove 33, avoiding sucking and breaking the oral mucosa and causing bleeding when the side saliva suction round hole 35 abuts against the oral mucosa. The inclined groove 36 connects the anti-blocking arc groove 34 and the anti-blocking groove 33, facilitating the saliva or blood in the oral cavity to quickly enter the anti-blocking groove 33 and the anti-blocking arc groove 34, and thus being quickly sucked into the saliva suction head 31 by the central saliva suction round hole 32 or the side saliva suction round hole 35.

[0044] The saliva anti-backflow mechanism 4 is installed inside the saliva suction head 31 and the joint mechanism 2;

[0045] The saliva anti-backflow mechanism 4 includes a spoke rod 41, a limit ring 42, a prism rod 43, a spring 44, a conical plug 45, a cylinder 46 and a round hole plug 47. Inside the end of the rigid connecting pipe 13 close to the saliva suction head 31, a limit ring 42 is connected by a plurality of spoke rods 41. Four spoke rods 41 can be used, and the four spoke rods 41 are equally angularly distributed around the outer peripheral side of the limit ring 42. The limit ring 42 is located at the center of the end of the rigid connecting pipe 13. A prism rod 43 is slidably connected inside the limit ring 42. One end of the prism rod 43 extends into the conical part 23 and is connected to one end of the cylinder 46. The other end of the cylinder 46 extends into the saliva suction head 31 and is fixedly connected to the round hole plug 47. The round hole plug 47 is correspondingly arranged with the inner end of the central saliva suction round hole 32. A conical plug 45 is fixedly sleeved on the part of the prism rod 43 located inside the conical part 23, and a spring 44 is sleeved on the part of the prism rod 43 between the conical plug 45 and the limit ring 42. The elastic force of the spring 44 pushes the conical plug 45 into the conical part 23. The prism rod 43 moves relative to the limit ring 42. The left end of the conical plug 45 blocks the throat part 24, and at the same time, the cylinder 46 drives the round hole plug 47 to block the central saliva suction round hole 32. When the deformable negative pressure pipe 11 is in a negative pressure state, the conical plug 45 overcomes the elastic force of the spring 44, drives the prism rod 43 and the cylinder 46 to move rightward. The conical plug 45 moves rightward to open the throat part 24, and the round hole plug 47 also opens the central saliva suction round hole 32 as the cylinder 46 moves rightward. At this time, the negative pressure state in the deformable negative pressure pipe 11 also makes the joint mechanism 2 and the saliva suction head 31 in a negative pressure state. The saliva suction head 31 can suck the saliva and blood in the patient's oral cavity through the central saliva suction round hole 32. When the external suction device stops working, the spring 44 resets and rebounds and elongates, pushing the conical plug 45, the prism rod 43 and the cylinder 46 to move leftward relative to the limit ring 42. The conical plug 45 completely enters the conical part 23 and blocks the throat part 24, and the round hole plug 47 blocks the central saliva suction round hole 32 as the cylinder 46 moves leftward, which can prevent the saliva and blood in the deformable negative pressure pipe 11 from flowing back into the saliva suction head 31 through the throat part 24, and can also prevent the residual saliva and blood in the saliva suction head 31 from dripping out through the central saliva suction round hole 32, and the hygiene is better.

[0046] The saliva backflow prevention mechanism 4 also includes a particle retaining ring 48, an oblique connecting rod 49, a movable cylinder 411 and a side hole 412. The inner side of the saliva suction head 31 is slidably connected to the movable cylinder 411, and the inner side of the closed end of the saliva suction head 31 is fixedly connected to the particle retaining ring 48. The outer side of the particle retaining ring 48 is slidably connected to the inner side of the end of the movable cylinder 411. The movable cylinder 411 is provided with a side hole 412 at the position corresponding to the side saliva suction circular hole 35. The end of the movable cylinder 411 close to the edge rod 43 is connected to the cylinder 46 through two oblique connecting rods 49. The movable cylinder 411 moves left and right with the cylinder 46 through the oblique connecting rod 49. When the spring 44 pushes the conical plug 45, the ridge rod 43 and the cylinder 46 to move left relative to the limiting ring 42, the left end of the movable cylinder 411 abuts against the inside of the closed end of the saliva suction head 31. At this time, the side hole 412 on the movable cylinder 411 is staggered with the side saliva suction hole 35. When the conical plug 45, the ridge rod 43 and the cylinder 46 move right relative to the limiting ring 42, the side hole 412 on the movable cylinder 411 corresponds to the side saliva suction hole 35. At this time, the saliva suction head 31 is in a negative pressure state, and the saliva suction head 31 can suck the oral cavity through the side hole 412 and the side saliva suction hole 35. Saliva and blood. When the external aspirator stops working, the spring 44 returns to its original position and stretches, pushing the conical plug 45, the angular rod 43 and the cylinder 46 to move left relative to the limit ring 42, and the movable cylinder 411 moves left relative to the saliva suction head 31. The side hole 412 on the movable cylinder 411 is staggered from the side saliva suction hole 35, and the saliva and blood remaining in the saliva suction head 31 will not drip outward through the side hole 412 and the side saliva suction hole 35. The particle retaining ring 48 is set to prevent some surgical debris in the saliva and blood from entering the space at the left end of the movable cylinder 411, thereby preventing these surgical debris from affecting the left movement of the movable cylinder 411 relative to the saliva suction head 31.

[0047] The saliva backflow prevention mechanism 4 further includes a conical filter 410, which is fixedly sleeved on the cylinder 46, and the edge of the end of the conical filter 410 is connected to the end of the movable cylinder 411. The conical filter 410 can filter surgical debris to prevent surgical debris from entering the joint mechanism 2 and the deformable negative pressure tube 11 to cause blockage, and can also prevent surgical debris from affecting the left end of the conical plug 45 to smoothly block the throat 24.

[0048] The negative pressure tube protection mechanism 5 is sleeved on the outer side of the deformable negative pressure tube 11 , and the end of the negative pressure tube protection mechanism 5 is connected to the outer side of the joint mechanism 2 .

[0049] The negative pressure tube protection mechanism 5 includes a transparent rubber tube 51, a convex ring 52, an annular groove 53, a tightening ring 54, a plug sleeve 55 and a control sleeve 56. An outer peripheral side of one end of the support mounting sleeve 25 close to the throat portion 24 is integrally formed and connected with the convex ring 52. The deformable negative pressure tube 11 is sleeved with the transparent rubber tube 51 on the outside. An inner ring groove corresponding to and cooperating with the convex ring 52 is formed in an inner side of one end of the transparent rubber tube 51 close to the saliva suction head 31. An annular groove 53 is formed in an outer side of one end of the transparent rubber tube 51 close to the saliva suction head 31. The annular groove 53 is located between the saliva suction head 31 and the annular groove 53, and the tightening ring 54 is installed in the annular groove 53. A plug sleeve 55 is sleeved on an outer side of one end of the deformable negative pressure tube 11 away from the saliva suction head 31. An outer side of the plug sleeve 55 is sleeved with an inner side of one end of the transparent rubber tube 51 away from the saliva suction head 31. An outer end of the plug sleeve 55 is integrally formed and connected with the control sleeve 56. The control sleeve 56 is sleeved on the deformable negative pressure tube 11, and an outer diameter of the control sleeve 56 is the same as an outer diameter of the transparent rubber tube 51.

[0050] Since the deformable negative pressure tube 11 is a thin metal tube, direct contact with the patient's mouth corner or around the mouth will cause discomfort to the patient and is also likely to form deep indentations. Therefore, the transparent rubber tube 51 is provided, which can increase the contact area with the patient's mouth corner or around the mouth, increase the comfort of the patient during use. At the same time, the doctor can also better hold the deformable negative pressure tube 11 with the help of the transparent rubber tube 51, so as to bend the deformable negative pressure tube 11 into the required shape, make the deformable negative pressure tube 11 better hang on the patient's mouth corner, and at the same time not interfere with the surgical process. The cooperation of the convex ring 52 and the inner ring groove enables better connection between the support mounting sleeve 25 and the transparent rubber tube 51. The transparent rubber tube 51 is tightly sleeved on the support mounting sleeve 25 with the help of the tightening ring 54 to prevent the support mounting sleeve 25 from separating from the transparent rubber tube 51. And a chamfer is provided on the inner side of the left end of the transparent rubber tube 51, making it easier to sleeve the transparent rubber tube 51 on the support mounting sleeve 25 during assembly, and the left end of the transparent rubber tube 51 abuts against the right end of the saliva suction head 31.

[0051] In use, the deformable negative pressure tube 11 is made of a deformable thin metal tube. The bent part of the deformable negative pressure tube 11 is convenient for hanging on the corner of the patient's mouth. The negative pressure tube protection mechanism 5 is used to protect the deformable negative pressure tube 11 and can also increase the area between the deformable negative pressure tube 11 and the patient's oral cavity, avoiding the appearance of indentations around the patient's oral cavity caused by the deformable negative pressure tube 11. At the same time, the doctor can also more conveniently bend the deformable negative pressure tube 11 as needed with the help of the negative pressure tube protection mechanism 5. The connecting ring 12 connects the deformable negative pressure tube 11 and the rigid connecting tube 13. The joint mechanism 2 is used to connect the rigid connecting tube 13 and the saliva suction head 31 and is also used to install the saliva anti-backflow mechanism 4. Among them, the rigid connecting tube 13 does not deform. The negative pressure interface 14 is connected to an external negative pressure source, such as a suction device. The suction device makes the inside of the saliva suction head 31 in a negative pressure state through the saliva suction negative pressure pipeline assembly 1 and the joint mechanism 2. The saliva suction head 31 can suck the saliva and blood in the patient's oral cavity through the middle saliva suction anti-blocking component and the side saliva suction anti-blocking component. After the dental operation is over, when the suction device is turned off, the saliva anti-backflow mechanism 4 can seal the middle saliva suction anti-blocking component and the side saliva suction anti-blocking component to prevent the remaining saliva and blood in the saliva suction head 31 from dripping, making the use more hygienic.

[0052] Embodiment 2. Please refer to Figures 1 to 8 , this embodiment provides a technical solution: a saliva suction tube. This embodiment is generally the same as that of Embodiment 1, and the difference lies in:

[0053] It further includes a corner limit protection mechanism 6. The corner limit protection mechanism 6 includes a protection pad 61, a corner platform 62, a limit protrusion 63, and an installation sleeve 64. An arc-shaped protection pad 61 is provided at the bottom of the bent part of the deformable negative pressure tube 11. Two installation sleeves 64 are integrally formed and connected to both ends of the protection pad 61 respectively. Both installation sleeves 64 are sleeved on the outside of the transparent rubber tube 51. A corner platform 62 is provided at the bottom of the protection pad 61, and two limit protrusions 63 are integrally formed and connected to both ends of the bottom of the protection pad 61 respectively. The protection pad 61, the limit protrusion 63, and the installation sleeve 64 are all made of cotton cloth or gauze, with good skin-friendliness. The corner platform 62 enables the protection pad 61 to better rest on the corner of the patient's mouth. The protection pad 61 makes the patient's corner of the mouth more comfortable. The installation sleeve 64 is used to stably install the protection pad 61 on the transparent rubber tube 51. The limit of the limit protrusion 63 makes the bent part of the deformable negative pressure tube 11 and the transparent rubber tube 51 hang more stably on the corner of the mouth.

[0054] Embodiment 3. Please refer to Figures 1 to 8 , this embodiment provides a technical solution: a saliva suction tube. This embodiment is generally the same as that of Embodiment 2, and the difference lies in:

[0055] It further includes a side saliva suction round hole plugging mechanism 7, which comprises a plugging rubber sleeve 71, a plugging rubber strip 72 and a saliva suction through groove 73. The inner diameter of the plugging rubber sleeve 71 is the same as the outer diameter of the saliva suction head 31, and three plugging rubber strips 72 are arranged at equal angles on the inner top of the plugging rubber sleeve 71. The three plugging rubber strips 72 are respectively arranged corresponding to the three anti-blocking arc grooves 34 on the top of the saliva suction head 31. Three saliva suction through grooves 73 are opened at equal angles at the bottom of the plugging rubber sleeve 71, and the three saliva suction through grooves 73 are respectively arranged corresponding to the three anti-blocking arc grooves 34 at the bottom of the saliva suction head 31. When the negative pressure in the saliva suction head 31 is insufficient or the saliva and blood in the oral cavity cannot submerge the middle part of the saliva suction head 31, the plugging rubber sleeve 71 can be sleeved on the saliva suction head 31, and the three anti-blocking arc grooves 34 on the top of the saliva suction head 31 are blocked by the three plugging rubber strips 72 on the plugging rubber sleeve 71, so that the negative pressure in the saliva suction head 31 is concentrated to act from the central saliva suction round hole 32, the three anti-blocking arc grooves 34 at the bottom and the side saliva suction round hole 35 at the bottom.

[0056] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or elements inherent to such process, method, article or device.

[0057] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A saliva suction tube, characterized in that: include: A saliva suction negative pressure pipeline assembly (1), comprising a deformable negative pressure tube (11), a connecting ring (12), a hard connecting tube (13) and a negative pressure interface (14), wherein the top of the deformable negative pressure tube (11) is bent to the left and connected to one end of the hard connecting tube (13) via the connecting ring (12), and the bottom end of the deformable negative pressure tube (11) is provided with a negative pressure interface (14); A joint mechanism (2) is mounted on an end of the hard pipe (13) away from the connecting ring (12); The saliva suction end mechanism (3) comprises a saliva suction head (31), a middle saliva suction anti-blocking component and a side saliva suction anti-blocking component, wherein the saliva suction head (31) is a cylindrical structure with one end closed and the other end provided with a circular opening, a middle saliva suction anti-blocking component is provided in the middle of the closed end of the saliva suction head (31), and the circular opening of the saliva suction head (31) is connected to an end of the joint mechanism (2) away from the hard pipe (13); The saliva backflow prevention mechanism (4) is installed inside the saliva suction head (31) and the joint mechanism (2); The negative pressure pipe protection mechanism (5) is sleeved on the outside of the deformable negative pressure pipe (11), and the end of the negative pressure pipe protection mechanism (5) is connected to the outside of the joint mechanism (2); A mouth corner limit protection mechanism (6) installed on the deformation negative pressure tube (11); The side saliva suction circular hole blocking mechanism (7) is sleeved on the outer side of the saliva suction head (31).

2. The saliva suction tube according to claim 1, characterized in that: The joint mechanism (2) comprises a joint sleeve (21), an externally threaded sleeve (22), a tapered portion (23), a throat portion (24) and a support and mounting sleeve (25); one end of the joint sleeve (21) is integrally connected to the externally threaded sleeve (22); the outer side of the externally threaded sleeve (22) is threadedly connected to the inner side of one end of the hard pipe (13) away from the connecting ring (12); the other end of the joint sleeve (21) is integrally connected to one end of the tapered portion (23); the other end of the tapered portion (23) is integrally connected to one end of the throat portion (24); the other end of the throat portion (24) is integrally connected to one end of the support and mounting sleeve (25); a tapered cavity is provided in the middle of the inner side of the support and mounting sleeve (25); the outer peripheral side of the other end of the support and mounting sleeve (25) is threadedly connected to the inner side of the circular opening of the saliva suction head (31).

3. The saliva suction tube according to claim 1, characterized in that: The central saliva suction anti-blocking component comprises a central saliva suction circular hole (32) and an anti-blocking groove (33); a central saliva suction circular hole (32) is provided in the middle of one closed end of the saliva suction head (31); six anti-blocking grooves (33) are provided in a circular array at one closed end of the saliva suction head (31); the six anti-blocking grooves (33) are all connected to the ends of the central saliva suction circular hole (32).

4. The saliva suction tube according to claim 3, characterized in that: The side saliva suction anti-blocking component comprises an anti-blocking arc groove (34), a side saliva suction circular hole (35) and an oblique groove (36); six anti-blocking arc grooves (34) are provided in an annular array on the outer circumference of the saliva suction head (31); two side saliva suction circular holes (35) are provided on the side surface of the saliva suction head (31) at positions corresponding to the two ends of each anti-blocking arc groove (34); the six anti-blocking arc grooves (34) are respectively arranged corresponding to the six anti-blocking grooves (33); and each anti-blocking arc groove (34) is connected to the corresponding anti-blocking groove (33) via the oblique groove (36).

5. The saliva suction tube according to claim 1, characterized in that: The saliva backflow prevention mechanism (4) comprises an angular rod (43), a spring (44), a conical plug (45), a cylinder (46) and a round hole plug (47); the inner side of one end of the hard pipe (13) close to the saliva suction head (31) is connected to a limiting ring (42) via a plurality of spokes (41); the limiting ring (42) is located at the center of the end of the hard pipe (13); the angular rod (43) is slidably connected in the limiting ring (42); one end of the angular rod (43) extends to the conical plug (45); The conical portion (23) is provided in a manner that the cylindrical portion (46) is connected to one end of the cylinder (46), the other end of the cylinder (46) extends into the saliva suction head (31) and is fixedly connected to a round hole plug (47), the round hole plug (47) being arranged corresponding to the inner end of the central saliva suction round hole (32), the portion of the prism (43) located in the conical portion (23) being fixedly sleeved with a conical plug (45), and the portion of the prism (43) located between the conical plug (45) and the limiting ring (42) being sleeved with a spring (44).

6. The saliva suction tube according to claim 5, characterized in that: The saliva backflow prevention mechanism (4) further comprises a particle retaining ring (48), an oblique connecting rod (49) and a movable cylinder (411); the inner side of the saliva suction head (31) is slidably connected to the movable cylinder (411); the inner side of a closed end of the saliva suction head (31) is fixedly connected to the particle retaining ring (48); the outer side of the particle retaining ring (48) is slidably connected to the inner side of the end of the movable cylinder (411); a side hole (412) is provided at a position of the movable cylinder (411) corresponding to the side saliva suction circular hole (35); and one end of the movable cylinder (411) close to the edge rod (43) is connected to the cylinder (46) via two oblique connecting rods (49).

7. The saliva suction tube according to claim 6, characterized in that: The saliva backflow prevention mechanism (4) further comprises a conical filter (410), the conical filter (410) is fixedly sleeved on the cylinder (46), and the end edge of the conical filter (410) is connected to the end of the movable cylinder (411).

8. The saliva suction tube according to claim 1, characterized in that: The negative pressure tube protection mechanism (5) comprises a transparent rubber tube (51), a convex ring (52), an annular groove (53), an elastic ring (54), a plug sleeve (55) and a control sleeve (56); the outer peripheral side of one end of the support mounting sleeve (25) close to the throat portion (24) is integrally formed with the convex ring (52); the outer side of the deformable negative pressure tube (11) is sleeved with the transparent rubber tube (51); the inner side of one end of the transparent rubber tube (51) close to the saliva suction head (31) is provided with an inner ring groove corresponding to the convex ring (52); the transparent rubber tube (51) is provided with a plurality of inner ring grooves corresponding to the convex ring (52); and the control sleeve (56) is provided with a plurality of inner ring grooves corresponding to the convex ring (52). 1) An annular groove (53) is provided on the outer side of one end close to the saliva suction head (31), the annular groove (53) is located between the saliva suction head (31) and the annular groove (53), and an elastic ring (54) is installed in the annular groove (53), a plug sleeve (55) is sleeved on the outer side of one end of the deformable negative pressure tube (11) away from the saliva suction head (31), the outer side of the plug sleeve (55) is sleeved on the inner side of one end of the transparent rubber tube (51) away from the saliva suction head (31), and the outer end of the plug sleeve (55) is integrally connected with a control sleeve (56).

9. The saliva suction tube according to claim 1, characterized in that: The mouth corner limiting protection mechanism (6) comprises a protective pad (61), a mouth corner platform (62), a limiting protrusion (63) and a mounting ring (64); a circular arc-shaped protective pad (61) is provided at the bottom of the bending portion of the deformable negative pressure tube (11); two mounting rings (64) are integrally formed and connected to the two ends of the protective pad (61); the two mounting rings (64) are both sleeved on the outside of the transparent rubber tube (51); a mouth corner platform (62) is provided at the bottom of the protective pad (61); and two limiting protrusions (63) are integrally formed and connected to the two ends of the bottom of the protective pad (61).

10. The saliva suction tube according to claim 1, characterized in that: The side saliva suction circular hole blocking mechanism (7) comprises a blocking rubber sleeve (71), a blocking rubber strip (72) and a saliva suction groove (73); the inner diameter of the blocking rubber sleeve (71) is the same as the outer diameter of the saliva suction head (31); three blocking rubber strips (72) are arranged at equal angles on the inner top of the blocking rubber sleeve (71); the three blocking rubber strips (72) are arranged correspondingly to the three anti-blocking arc grooves (34) on the top of the saliva suction head (31); and three saliva suction grooves (73) are opened at equal angles on the bottom of the blocking rubber sleeve (71); the three saliva suction grooves (73) are arranged correspondingly to the three anti-blocking arc grooves (34) on the bottom of the saliva suction head (31).

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