Chair-side multifunctional oral cavity negative pressure aspirator support

Abstract

The invention relates to the technical field of medical instruments, in particular to a chair-side multifunctional oral cavity negative pressure aspirator support which comprises a universal joint located in the middle of the device, a fixing assembly fixedly connected with one end of the universal joint and a fixing assembly connected with the other end of the universal joint. The fixing assembly is detachably connected with a metal rod of the dental chair head support, the holding frame is fixedly connected with the other end of the universal joint, the holding frame is jointly composed of a rotating assembly and a clamping assembly, the clamping assembly can stably clamp a negative pressure aspirator tube, and the rotating assembly can drive the clamping assembly to conduct angle fine adjustment. In the process that the clamping assembly clamps the negative pressure aspirator tube, the clamping assembly locks the rotating assembly through the locking structure, and the medical treatment experience of a patient is good; working time beside a nurse chair is saved, and working efficiency is improved; the position is stable; the placement is flexible; various oral instruments can be clamped, and the functions are diversified; and the structure of the dental chair is not damaged.

Description

Technical Field

[0001] The invention relates to the technical field of medical instruments, in particular to a chair-side multifunctional oral negative pressure aspirator bracket. Background Art

[0002] Oral clinical operations usually require the cooperation of doctors and nurses. Among them, some treatments with high technical difficulty, multiple instruments and complex procedures require frequent and tacit cooperation between doctors and nurses, such as root canal filling and porcelain veneer bonding.

[0003] However, there are also a large number of clinical operations that do not require too much instrument transfer or four-hand coordination, such as full crown preparation, root canal preparation, etc. Take full crown preparation as an example. Before the dentist makes an all-ceramic crown for the patient, he needs to "grind down" the original teeth to reserve space for the later restoration. In this process, the doctor only needs to use different types of diamond grinding cars to shape and polish the patient's teeth, while the nurse mainly cooperates to complete saliva suction (i.e., using a chairside negative pressure aspirator to suck out the liquid in the patient's mouth). Therefore, the participation is not high and the nurses cannot play their due role.

[0004] Currently, there is no technology that can solve this problem. The common clinical practice is that doctors pre-bend the negative pressure suction tube and hang it at the corner of the patient's mouth to automatically suck out saliva. This practice has the following disadvantages:

[0005] 1. Affect the patient's experience of seeing a doctor (sucking close to the inside of the mouth corner for a long time may cause local mucosal damage);

[0006] 2. Unstable position (it may shift as the patient's head swings, affecting the suction effect and even interfering with the doctor's operation);

[0007] 3. Limited position (needs to be suspended at the corner of the mouth, so it cannot be used in the anterior teeth area);

[0008] 4. Single function (it cannot be used for mouth mirrors, light curing lamps, strong negative pressure aspirators, etc. that cannot be pre-bent, but also machines with the above problems). Summary of the invention

[0009] The object of the present invention is to provide a chairside multifunctional oral negative pressure aspirator bracket to solve the problems raised in the above-mentioned background technology.

[0010] To achieve the above object, the present invention provides the following technical solutions:

[0011] A multifunctional chairside oral negative pressure suction device bracket, comprising:

[0012] A universal joint, which is located in the middle of the device and can bend arbitrarily and maintain its own shape;

[0013] A fixing assembly, the fixing assembly is fixedly connected to one end of the universal joint, and the fixing assembly is detachably connected to a metal rod of a dental chair headrest;

[0014] A holding rack, the holding rack is fixedly connected to the other end of the universal joint, the holding rack is composed of a rotating assembly and a clamping assembly, the clamping assembly can stably clamp the negative pressure suction tube or other oral equipment, and the rotating assembly can drive the clamping assembly to fine-tune the angle, so that the negative pressure suction tube fixed by the clamping assembly is deflected to a suitable angle;

[0015] When the clamping assembly clamps the negative pressure aspirator tube, the clamping assembly locks the rotating assembly through the locking structure, thereby preventing the rotating assembly from rotating.

[0016] As a further solution of the present invention: the rotating assembly comprises a sleeve having one end fixedly connected to the other end of the universal joint and a rotating column having one end rotatably connected to the other end of the sleeve;

[0017] A limiting convex ring is fixedly arranged on the inner wall of the sleeve, a limiting groove is arranged on the outer wall of the rotating column, and the limiting convex ring is located inside the limiting groove and rotates in cooperation with each other.

[0018] As a further solution of the present invention: the clamping assembly includes a U-shaped plate with one side fixedly connected to the other end of the rotating column and a first clamping plate and a second clamping plate symmetrically arranged inside the U-shaped plate, and the first clamping plate is fixedly connected to the inner wall of the U-shaped plate;

[0019] A guide rod is fixedly connected to the side of the No. 2 clamping plate away from the No. 1 clamping plate, one end of the guide rod passes through the U-shaped plate and extends to the outside, a circular plate is fixedly provided at one end of the guide rod, and a No. 1 spring is sleeved on the outer wall of the guide rod, and the two ends of the No. 1 spring respectively abut against the outer wall of the U-shaped plate and the side of the circular plate close to the U-shaped plate.

[0020] As a further solution of the present invention: the clamping assembly further comprises a cover plate fixedly arranged outside the U-shaped plate, and the inner side wall of the cover plate is rotatably provided with a worm gear parallel to the second clamping plate;

[0021] A worm is rotatably arranged on the cover plate and meshes with the worm wheel. A knob is fixedly arranged at one end of the worm.

[0022] As a further solution of the present invention: two mutually corresponding oblique blocks are fixedly provided on one side of the worm wheel close to the second clamping plate, and two mutually corresponding sliding rods are fixedly provided on one side of the second clamping plate close to the worm wheel;

[0023] One end of the slide rod passes through the U-shaped plate and extends to the inside of the cover plate. A roller is rotatably arranged at one end of the slide rod. The roller and the worm gear fit each other and correspond to the position of the oblique block.

[0024] As a further solution of the present invention: the locking structure comprises a No. 1 collar slidably sleeved on the sleeve and a No. 2 collar fixedly arranged on the rotating column, and a plurality of No. 1 latch teeth and a plurality of No. 2 latch teeth are fixedly arranged on one side of the No. 1 collar and the No. 2 collar close to each other;

[0025] The plurality of first-number latch teeth are evenly distributed along the circumferential direction of the first-number collar, and the plurality of second-number latch teeth are evenly distributed along the circumferential direction of the second-number collar.

[0026] As a further solution of the present invention: the end close to the No. 1 tooth and the No. 2 tooth is set to a pointed cone, and the spacing between multiple No. 1 teeth is adapted to the diameter of the No. 2 teeth, and the spacing between multiple No. 2 teeth is adapted to the diameter of the No. 1 tooth.

[0027] As a further solution of the present invention: the locking structure further comprises a retaining ring fixedly arranged on the sleeve, and a side of the No. 1 sleeve ring away from the No. 2 sleeve ring abuts against the retaining ring;

[0028] A moving rod is fixedly provided on one side of the No. 1 sleeve ring close to the baffle ring, one end of the moving rod passes through the baffle ring and is fixedly connected to a baffle plate, a No. 2 spring is sleeved on the outer wall of the moving rod, and both ends of the No. 2 spring are respectively against the baffle ring and the baffle plate.

[0029] As a further solution of the present invention: a sliding groove is provided on the side wall of the U-shaped plate, a conical ring is fixedly provided on the outer wall of the No. 1 sleeve ring, and the inclined surface of the conical ring is close to the retaining ring;

[0030] An L-shaped rod is fixedly arranged on the outer wall of the slide rod, one end of the L-shaped rod passes through the slide groove and is fixedly connected with a trapezoidal block, and the inclined surface of the trapezoidal block fits with the inclined surface of the conical ring.

[0031] As a further solution of the present invention: the fixing assembly comprises a frame plate with one end fixedly connected to one end of the universal joint, and a threaded rod is threadedly connected through one side wall of the frame plate;

[0032] A pressing plate is fixedly arranged at one end of the threaded rod, and the pressing plate is located inside the frame plate. A button plate is fixedly arranged at the other end of the threaded rod.

[0033] Compared with the prior art, the present invention has the following beneficial effects:

[0034] The fixed component can be quickly disassembled and assembled with the metal rod of the dental chair headrest; the universal joint can be bent arbitrarily and maintain its own shape; the holding rack composed of the rotating component and the clamping component can stably clamp the negative pressure suction tube or other oral equipment, and the rotating component can drive the clamping component to fine-tune the angle, so that the negative pressure suction tube fixed by the clamping component is deflected to a suitable angle; in addition, after the angle is fine-tuned, when the negative pressure suction tube is clamped by the clamping component, the clamping component will lock the rotating component through the locking structure, thereby preventing the rotating component from rotating.

[0035] This application provides a good patient consultation experience (completely avoiding the saliva suction tube hanging at the corner of the patient's mouth); saves nurses' working time at the chair and improves work efficiency; has a stable position; is flexible to place; can hold a variety of oral instruments and has diverse functions; is easy to disassemble without damaging the structure of the dental chair itself. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 The present invention is a schematic diagram of the overall structure of an embodiment of a multifunctional chairside oral negative pressure aspirator bracket.

[0037] Figure 2 This is a schematic diagram from another perspective of the overall structure of an embodiment of a chairside multifunctional oral negative pressure aspirator bracket.

[0038] Figure 3 A cross-sectional view of the U-shaped plate and cover plate structure of an embodiment of a chairside multifunctional oral negative pressure aspirator bracket.

[0039] Figure 4 for Figure 3 Enlarged view of point A in the middle.

[0040] Figure 5 A schematic diagram of an embodiment of a chairside multifunctional oral negative pressure aspirator bracket with the universal joint and fixing components removed.

[0041] Figure 6 for Figure 5 Enlarged view of point B in the middle.

[0042] Figure 7 A cross-sectional view of the holding rack structure of an embodiment of a chairside multifunctional oral negative pressure aspirator bracket.

[0043] Figure 8 for Figure 7 Enlarged view of center C.

[0044] Fig. 9 This is a disassembled diagram of some rotating components and locking structures of an embodiment of a chairside multifunctional oral negative pressure aspirator bracket.

[0045] Fig.10This is a disassembled diagram of the sleeve and rotating column of an embodiment of a chairside multifunctional oral negative pressure suction device bracket.

[0046] Fig.11 A cross-sectional view of a fixing assembly of an embodiment of a chairside multifunctional oral negative pressure suction device bracket.

[0047] In the figure: 1. universal joint; 2. sleeve; 201. limiting convex ring; 3. rotating column; 301. limiting groove; 4. U-shaped plate; 401. sliding groove; 5. No. 1 clamping plate; 6. No. 2 clamping plate; 7. guide rod; 8. round plate; 9. No. 1 spring; 10. cover plate; 11. worm gear; 12. worm; 13. knob; 14. oblique block; 15. sliding rod; 16. roller; 17. No. 1 collar; 1701. No. 1 tooth; 18. No. 2 collar; 1801. No. 2 tooth; 19. retaining ring; 20. moving rod; 21. baffle; 22. No. 2 spring; 23. conical ring; 24. L-shaped rod; 25. trapezoidal block; 26. frame plate; 27. threaded rod; 28. pressure plate; 29. ​​button plate. DETAILED DESCRIPTION

[0048] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0049] In addition, when an element in the present invention is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only embodiment.

[0050] See also Figures 1 to 11 In an embodiment of the present invention, a multifunctional chairside oral negative pressure suction device bracket includes a universal joint 1, wherein the universal joint 1 is located in the middle of the device and can be bent arbitrarily and maintain its own shape;

[0051] A fixing assembly, the fixing assembly is fixedly connected to one end of the universal joint 1, and the fixing assembly is detachably connected to a metal rod of a dental chair headrest;

[0052] A holding rack, the holding rack is fixedly connected to the other end of the universal joint 1, the holding rack is composed of a rotating assembly and a clamping assembly, the clamping assembly can stably clamp the negative pressure suction tube or other oral equipment, and the rotating assembly can drive the clamping assembly to fine-tune the angle, so that the negative pressure suction tube fixed by the clamping assembly is deflected to a suitable angle;

[0053] When the clamping assembly clamps the negative pressure aspirator tube, the clamping assembly locks the rotating assembly through the locking structure, thereby preventing the rotating assembly from rotating.

[0054] In the present solution, the fixing component is arranged to be able to be quickly assembled and disassembled from the metal rod of the dental chair headrest; the universal joint 1 can be bent arbitrarily and maintain its own shape; the holding rack composed of the rotating component and the clamping component can stably clamp the negative pressure suction tube or other oral equipment, and the rotating component can drive the clamping component to fine-tune the angle, so that the negative pressure suction tube fixed by the clamping component is deflected to a suitable angle; in addition, after the angle is fine-tuned, during the process of clamping the negative pressure suction tube using the clamping component, the clamping component will lock the rotating component through the locking structure, thereby preventing the rotating component from rotating.

[0055] See also Figure 8 , Fig. 9 The rotating assembly includes a sleeve 2 having one end fixedly connected to the other end of the universal joint 1 and a rotating column 3 having one end rotatably connected to the other end of the sleeve 2;

[0056] A limiting convex ring 201 is fixedly disposed on the inner wall of the sleeve 2, and a limiting groove 301 is formed on the outer wall of the rotating column 3. The limiting convex ring 201 is located inside the limiting groove 301 and rotates in cooperation with each other.

[0057] In this embodiment, since the sleeve 2 is fixedly connected to the other end of the universal joint 1, and the rotational cooperation between the rotating column 3 and the sleeve 2 is achieved through the mutual rotational cooperation between the limiting protruding ring 201 and the limiting groove 301, the rotational cooperation between the rotating column 3 and the universal joint 1 is achieved.

[0058] See also Figure 3 , Figure 4 , Figure 7 The clamping assembly includes a U-shaped plate 4 whose one side is fixedly connected to the other end of the rotating column 3 and a first clamping plate 5 and a second clamping plate 6 symmetrically arranged inside the U-shaped plate 4, and the first clamping plate 5 is fixedly connected to the inner wall of the U-shaped plate 4;

[0059] A guide rod 7 is fixedly connected to the side of the No. 2 clamping plate 6 away from the No. 1 clamping plate 5, one end of the guide rod 7 passes through the U-shaped plate 4 and extends to the outside, a circular plate 8 is fixedly provided at one end of the guide rod 7, and a No. 1 spring 9 is sleeved on the outer wall of the guide rod 7, and the two ends of the No. 1 spring 9 are respectively abutted against the outer wall of the U-shaped plate 4 and the side of the circular plate 8 close to the U-shaped plate 4.

[0060] In this embodiment, due to the presence of the No. 1 spring 9 and the maintained compressed state, in the absence of external force, the No. 1 spring 9 will make the No. 2 clamping plate 6 always have a tendency to move away from the No. 1 clamping plate 5 through the guide rod 7 and the circular plate 8;

[0061] During specific use, the negative pressure suction device tube is located between the No. 1 clamp 5 and the No. 2 clamp 6. When the No. 2 clamp 6 overcomes the elastic force of the No. 1 spring 9 and approaches the No. 1 clamp 5, the negative pressure suction device tube can be clamped and fixed.

[0062] See also Figure 3 , Figure 4 The clamping assembly further comprises a cover plate 10 fixedly arranged outside the U-shaped plate 4, and a worm gear 11 parallel to the second clamping plate 6 is rotatably arranged on the inner side wall of the cover plate 10;

[0063] A worm 12 is rotatably disposed on the cover plate 10 and meshes with the worm wheel 11 . A knob 13 is fixedly disposed at one end of the worm 12 .

[0064] In this embodiment, since the worm 12 and the worm wheel 11 are meshed with each other, when the knob 13 is rotated by an external force, the worm 12 will drive the worm wheel 11 to rotate;

[0065] Furthermore, because the worm wheel 11 and the worm 12 have a self-locking function, the safety, stability and energy saving effects are improved.

[0066] See also Figure 4 , two mutually corresponding oblique blocks 14 are fixedly provided on one side of the worm wheel 11 close to the second splint 6, and two mutually corresponding sliding rods 15 are fixedly provided on one side of the second splint 6 close to the worm wheel 11;

[0067] One end of the slide rod 15 passes through the U-shaped plate 4 and extends to the inside of the cover plate 10 . A roller 16 is rotatably provided at one end of the slide rod 15 . The roller 16 and the worm gear 11 are in contact with each other and correspond to the position of the oblique block 14 .

[0068] In this embodiment, since the positions of the oblique block 14 and the roller 16 correspond, the oblique block 14 will contact the roller 16 in the process of following the rotation of the worm gear 11, and the oblique block 14 will cooperate with the roller 16 to make the slide bar 15 and the second clamping plate 6 approach the first clamping plate 5, thereby clamping the negative pressure suction device tube;

[0069] During the movement of the No. 2 clamping plate 6 , the No. 1 spring 9 will be further compressed through the guide rod 7 and the circular plate 8 .

[0070] See also Figure 6 , Fig. 9 The locking structure includes a No. 1 collar 17 slidably sleeved on the sleeve 2 and a No. 2 collar 18 fixedly arranged on the rotating column 3, and a plurality of No. 1 latch teeth 1701 and a plurality of No. 2 latch teeth 1801 are fixedly arranged on one side of the No. 1 collar 17 and the No. 2 collar 18 close to each other;

[0071] The plurality of first latch teeth 1701 are evenly distributed along the circumferential direction of the first sleeve ring 17 , and the plurality of second latch teeth 1801 are evenly distributed along the circumferential direction of the second sleeve ring 18 .

[0072] In this embodiment, since the sleeve 2 and the rotating column 3 are rotatably matched with each other, the No. 1 ring 17 is slidably set on the sleeve 2, and the No. 2 ring 18 is fixedly set on the rotating column 3, and the No. 1 ring 17 and the No. 2 ring 18 are respectively fixedly set with multiple No. 1 latch teeth 1701 and multiple No. 2 latch teeth 1801 on one side close to each other. Therefore, when the No. 1 ring 17 is driven to move closer to the No. 2 ring 18 by an external force, the multiple No. 1 latch teeth 1701 and the multiple No. 2 latch teeth 1801 are locked with each other, so the sleeve 2 and the rotating column 3 will be locked by the No. 1 ring 17 and the No. 2 ring 18 and cannot rotate relative to each other.

[0073] See also Figure 6 , Fig. 9 The end close to the No. 1 latch tooth 1701 and the No. 2 latch tooth 1801 is set to a pointed cone, and the spacing between the multiple No. 1 latch teeth 1701 is adapted to the diameter of the No. 2 latch teeth 1801, and the spacing between the multiple No. 2 latch teeth 1801 is adapted to the diameter of the No. 1 latch tooth 1701.

[0074] In this embodiment, since the end of the first latch tooth 1701 and the second latch tooth 1801 that is close to each other is configured as a pointed cone, the first latch tooth 1701 and the second latch tooth 1801 can be moved closer to the buckle more smoothly, thus avoiding the jamming.

[0075] See also Figure 6 , Figure 8The locking structure further comprises a retaining ring 19 fixedly arranged on the sleeve 2, and the side of the No. 1 sleeve ring 17 away from the No. 2 sleeve ring 18 abuts against the retaining ring 19;

[0076] A moving rod 20 is fixedly provided on one side of the No. 1 sleeve ring 17 close to the baffle ring 19, one end of the moving rod 20 passes through the baffle ring 19 and is fixedly connected to a baffle plate 21, and a No. 2 spring 22 is sleeved on the outer wall of the moving rod 20, and both ends of the No. 2 spring 22 are respectively against the baffle ring 19 and the baffle plate 21.

[0077] In this embodiment, due to the presence of the No. 2 spring 22 and the maintained compressed state, in the absence of external force, the No. 2 spring 22 will make the No. 1 ring 17 always close to the baffle ring 19 through the baffle plate 21 and the moving rod 20, thereby preventing the No. 1 ring 17 from sliding randomly, and ensuring that the No. 1 ring 17 and the No. 2 ring 18 are always in a state of being separated, that is, the No. 1 latch tooth 1701 and the No. 2 latch tooth 1801 are in a separated state, so the sleeve 2 and the rotating column 3 can rotate relative to each other.

[0078] See also Figure 6 , Figure 8 The side wall of the U-shaped plate 4 is provided with a slide groove 401, and the outer wall of the No. 1 sleeve ring 17 is fixedly provided with a conical ring 23, and the inclined surface of the conical ring 23 is close to the retaining ring 19;

[0079] An L-shaped rod 24 is fixedly provided on the outer wall of the slide rod 15 . One end of the L-shaped rod 24 passes through the slide groove 401 and is fixedly connected to a trapezoidal block 25 . The inclined surface of the trapezoidal block 25 fits with the inclined surface of the conical ring 23 .

[0080] In this embodiment, since the L-shaped rod 24 is fixedly connected to the sliding rod 15, one end of the L-shaped rod 24 passes through the sliding groove 401 and is fixedly connected with the trapezoidal block 25, and the inclined surface of the trapezoidal block 25 is in contact with the inclined surface of the conical ring 23 fixedly arranged on the outer wall of the No. 1 ring 17. Therefore, in the process of the No. 2 splint 6 approaching the No. 1 splint 5, the sliding rod 15 will drive the trapezoidal block 25 to squeeze the conical ring 23 through the L-shaped rod 24, and the conical ring 23 will drive the No. 1 ring 17 to overcome the elastic force of the No. 2 spring 22 and approach the No. 2 ring 18, so that the No. 1 clamping tooth 1701 and the No. 2 clamping tooth 1801 are locked with each other.

[0081] See also Figure 1 , Fig.11 The fixing assembly includes a frame plate 26 with one end fixedly connected to one end of the universal joint 1, and a threaded rod 27 is threadedly connected through one side wall of the frame plate 26;

[0082] A pressing plate 28 is fixedly disposed at one end of the threaded rod 27 , and the pressing plate 28 is located inside the frame plate 26 . A button plate 29 is fixedly disposed at the other end of the threaded rod 27 .

[0083] In this embodiment, when in use, the frame plate 26 is first sleeved on the outer wall of the metal rod of the dental chair headrest, and then the button plate 29 is rotated by external force, and the button plate 29 will drive the threaded rod 27 to rotate. Since the threaded rod 27 and the frame plate 26 are threadedly matched with each other, the threaded rod 27 will drive the pressure plate 28 to cooperate with the frame plate 26 to clamp the metal rod of the dental chair headrest, so that the device is fixed on the metal rod of the dental chair headrest.

[0084] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0085] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A multifunctional chairside oral negative pressure suction device bracket, It is characterized in that include: A universal joint (1), the universal joint (1) being located in the middle of the device and being able to bend arbitrarily and maintain its own shape; A fixing assembly, the fixing assembly being fixedly connected to one end of the universal joint (1), and the fixing assembly being detachably connected to a metal rod of a dental chair headrest; A holding rack, the holding rack is fixedly connected to the other end of the universal joint (1), the holding rack is composed of a rotating assembly and a clamping assembly, the clamping assembly can stably clamp the negative pressure suction tube or other oral equipment, and the rotating assembly can drive the clamping assembly to fine-tune the angle, so that the negative pressure suction tube fixed by the clamping assembly is deflected to a suitable angle; When the clamping assembly clamps the negative pressure aspirator tube, the clamping assembly locks the rotating assembly through the locking structure, thereby preventing the rotating assembly from rotating.

2. A multifunctional chairside oral negative pressure suction device holder according to claim 1, It is characterized in that The rotating assembly comprises a sleeve (2) having one end fixedly connected to the other end of the universal joint (1) and a rotating column (3) having one end rotatably connected to the other end of the sleeve (2); A limiting convex ring (201) is fixedly provided on the inner wall of the sleeve (2), a limiting groove (301) is provided on the outer wall of the rotating column (3), and the limiting convex ring (201) is located inside the limiting groove (301) and rotates in cooperation with each other.

3. A multifunctional chairside oral negative pressure suction device holder according to claim 2, It is characterized in that The clamping assembly comprises a U-shaped plate (4) having one side fixedly connected to the other end of the rotating column (3), and a first clamping plate (5) and a second clamping plate (6) symmetrically arranged inside the U-shaped plate (4), wherein the first clamping plate (5) is fixedly connected to the inner wall of the U-shaped plate (4); A guide rod (7) is fixedly connected to the side of the second clamping plate (6) away from the first clamping plate (5), one end of the guide rod (7) passes through the U-shaped plate (4) and extends to the outside, a circular plate (8) is fixedly arranged at one end of the guide rod (7), and a first spring (9) is sleeved on the outer wall of the guide rod (7), and the two ends of the first spring (9) are respectively abutted against the outer wall of the U-shaped plate (4) and the side of the circular plate (8) close to the U-shaped plate (4).

4. The multifunctional chairside oral negative pressure suction device holder according to claim 3, It is characterized in that The clamping assembly further comprises a cover plate (10) fixedly arranged outside the U-shaped plate (4), and a worm gear (11) is rotatably arranged on the inner side wall of the cover plate (10) and is parallel to the second clamping plate (6); A worm (12) is rotatably arranged on the cover plate (10) and meshes with the worm wheel (11), and a knob (13) is fixedly arranged at one end of the worm (12).

5. The multifunctional chairside oral negative pressure suction device holder according to claim 4, It is characterized in that Two mutually corresponding oblique blocks (14) are fixedly provided on one side of the worm wheel (11) close to the second clamping plate (6), and two mutually corresponding sliding rods (15) are fixedly provided on one side of the second clamping plate (6) close to the worm wheel (11); One end of the slide rod (15) passes through the U-shaped plate (4) and extends to the inside of the cover plate (10). A roller (16) is rotatably provided at one end of the slide rod (15). The roller (16) and the worm gear (11) are in contact with each other and correspond to the position of the oblique block (14).

6. The multifunctional chairside oral negative pressure suction device holder according to claim 5, It is characterized in that The locking structure comprises a No. 1 collar (17) slidably sleeved on the sleeve (2) and a No. 2 collar (18) fixedly arranged on the rotating column (3); a plurality of No. 1 latch teeth (1701) and a plurality of No. 2 latch teeth (1801) are fixedly arranged on one side of the No. 1 collar (17) and the No. 2 collar (18) close to each other; The plurality of first-number latch teeth (1701) are evenly distributed along the circumferential direction of the first-number collar (17), and the plurality of second-number latch teeth (1801) are evenly distributed along the circumferential direction of the second-number collar (18).

7. The multifunctional chairside oral negative pressure suction device holder according to claim 6, It is characterized in that The end close to the No. 1 latch tooth (1701) and the No. 2 latch tooth (1801) is configured as a pointed cone, and the spacing between the plurality of No. 1 latch teeth (1701) is adapted to the diameter of the No. 2 latch teeth (1801), and the spacing between the plurality of No. 2 latch teeth (1801) is adapted to the diameter of the No. 1 latch tooth (1701).

8. The multifunctional chairside oral negative pressure suction device holder according to claim 6, It is characterized in that The locking structure further comprises a retaining ring (19) fixedly arranged on the sleeve (2), and a side of the No. 1 sleeve ring (17) away from the No. 2 sleeve ring (18) abuts against the retaining ring (19); A moving rod (20) is fixedly arranged on one side of the No. 1 sleeve ring (17) close to the baffle ring (19); one end of the moving rod (20) passes through the baffle ring (19) and is fixedly connected to a baffle plate (21); a No. 2 spring (22) is sleeved on the outer wall of the moving rod (20); two ends of the No. 2 spring (22) are respectively abutted against the baffle ring (19) and the baffle plate (21).

9. The multifunctional chairside oral negative pressure suction device holder according to claim 8, It is characterized in that The side wall of the U-shaped plate (4) is provided with a sliding groove (401), the outer wall of the No. 1 sleeve ring (17) is fixedly provided with a conical ring (23), and the inclined surface of the conical ring (23) is close to the retaining ring (19); An L-shaped rod (24) is fixedly provided on the outer wall of the sliding rod (15), one end of the L-shaped rod (24) passes through the sliding groove (401) and is fixedly connected to a trapezoidal block (25), and the inclined surface of the trapezoidal block (25) is in contact with the inclined surface of the conical ring (23).

10. The multifunctional chairside oral negative pressure suction device holder according to claim 1, It is characterized in that The fixing assembly comprises a frame plate (26) having one end fixedly connected to one end of the universal joint (1), and a threaded rod (27) is threadedly connected through a side wall of the frame plate (26); A pressing plate (28) is fixedly provided at one end of the threaded rod (27), and the pressing plate (28) is located inside the frame plate (26). A button plate (29) is fixedly provided at the other end of the threaded rod (27).

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