A cleaning brush for a saliva suction duct of an oral treatment unit

Abstract

The utility model relates to a kind of oral comprehensive treatment table suction saliva pipeline cleaning brush, including the cleaning part for cleaning inside suction saliva pipe and the hand-held part connected in the cleaning part proximal end, the cleaning part includes inner tube, hollow rotating rod and cleaning cover, it is characterized in that, in the case where the inner tube is connected with hand-held part, the liquid bag of inner tube distal end is filled with liquid to make it swell and abut on suction saliva inner wall, so as to fix inner tube in the predetermined position, and by cutting off suction saliva pipe to form a space allowing cleaning agent injection in the proximal end side of liquid bag;In the case where the hollow rotating rod is connected with hand-held part, the hollow rotating rod is axially rotated under the drive of hand-held part, driving cleaning cover that is sleeved on the outer wall of hollow rotating rod synchronous rotation, so that cleaning cover brush removes dirt softened by cleaning agent on suction saliva inner wall.The cleaning brush of the utility model utilizes two steps of soaking and removing, and improves the removal effect of dirt on suction saliva inner wall.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, and in particular to a cleaning brush for the saliva suction channel of a dental treatment table. Background Technology

[0002] In dental treatment, the saliva suction tube in the dental chair is used to continuously suction saliva, blood, and debris from the patient's mouth throughout the entire treatment. It is a non-removable, thin, long plastic tube, approximately 1.5 meters in length, connected to the dental chair. Its internal spiral shape, with grooves and folds, creates cleaning dead zones, easily trapping blood, tooth debris, and other protein-containing organic matter. These substances are highly adhesive, difficult to clean, and long-term residue can cause unpleasant odors and become a breeding ground for bacteria, viruses (such as HBV and HIV), and fungi. Studies show that the bacterial colony count on its inner wall can reach 10³ to 10⁻⁶. 5 CFU / cm2. Because the tube cannot be disassembled, current cleaning methods, such as rinsing with water or chlorine-based disinfectants before and after treatment, are ineffective. During suctioning, microorganisms inside the tube can contaminate the treatment area with the airflow, and bacterial aerosols can circulate and spread into the treatment room air, causing a bloody smell and a noticeable odor, posing a risk of iatrogenic infection. How to effectively clean the dental chair suction tube remains a challenge for clinicians.

[0003] Protein-based grime (such as bloodstains and mucus) mixed with inorganic substances accumulates on the inner walls of the suction tube over time, forming a highly adhesive layer. This type of complex grime requires thorough soaking and softening with a cleaning agent before mechanical scrubbing for complete removal. However, traditional flushing methods can only clean certain sections of the tube and cannot achieve both soaking softening and comprehensive scrubbing.

[0004] Existing cleaning devices have two major drawbacks: First, conventional drain cleaning equipment cannot create a closed space inside the saliva suction tube, so the cleaning agent cannot stay and soak, and stubborn dirt is not fully dissolved; second, manual brushes are difficult to reach the entire area, straight back-and-forth brushing has blind spots, and rotating brushing devices are prone to deviating from the dirt accumulation area due to the lack of reliable fixation.

[0005] CN222402655U discloses a dental chair suction duct cleaning device that uses a handle to pull out a brush assembly and spray cleaning fluid for brushing. Although this solution adds a mechanical brushing function, it relies on the instant spraying of flowing cleaning fluid, which cannot form static soaking, resulting in insufficient softening of dirt; moreover, the brush can only move in a linear axial direction and has no rotational function, resulting in low cleaning efficiency for circumferential dirt; in addition, it relies on passive support and cannot actively fix the cleaning position, making it easy for the brush to deviate from the target area.

[0006] Therefore, there is an urgent need for a cleaning device that combines soaking and scrubbing functions, is precise in positioning, and is easy to operate, in order to thoroughly clean the deep dirt in saliva suction tubes.

[0007] Furthermore, on the one hand, there are differences in understanding among those skilled in the art; on the other hand, the applicant studied a large number of documents and patents when making this utility model, but due to space limitations, not all details and contents were listed in detail. However, this does not mean that this utility model does not have the features of these prior art. On the contrary, this utility model has all the features of the prior art, and the applicant reserves the right to add relevant prior art to the background art. Utility Model Content

[0008] To address the shortcomings of existing technologies, this application proposes a cleaning brush for the saliva suction pipe of a dental treatment unit, and more particularly a cleaning device capable of soaking and wiping away stains from the inner wall of the drainage pipe of a dental treatment unit, aiming to solve one or more technical problems in the prior art.

[0009] This utility model relates to a cleaning brush for a saliva suction tube in a dental treatment unit, comprising a cleaning section for cleaning the inside of the saliva suction tube and a handheld part connected to the proximal end of the cleaning section. The cleaning section includes an inner tube, a hollow rotating rod, and a cleaning sleeve. The characteristic feature is that, when the inner tube is connected to the handheld part, the handheld part inflates a liquid bladder at the distal end of the inner tube to expand it and press it against the inner wall of the saliva suction tube, thereby fixing the inner tube in a predetermined position and creating a space on the proximal side of the liquid bladder that allows for the injection of cleaning agent by isolating the saliva suction tube. When the hollow rotating rod is connected to the handheld part, the hollow rotating rod rotates axially under the drive of the handheld part, causing the cleaning sleeve fitted on the outer wall of the hollow rotating rod to rotate synchronously, so that the cleaning sleeve brushes away the dirt softened by the cleaning agent on the inner wall of the saliva suction tube.

[0010] The cleaning brush's liquid bladder expands and presses tightly against the inner wall of the saliva suction tube, firmly fixing the cleaning section in the predetermined position. Simultaneously, it forms a circumferentially sealed partition, creating a closed space for the cleaning agent, ensuring that the agent fully soaks and softens stubborn dirt on the inner wall of the target tube section. Driven by the handheld part, the hollow rotating rod rotates the cleaning sleeve axially, allowing the brushes on the sleeve surface to circumferentially scrape away the softened dirt, overcoming the blind spots inherent in linear reciprocating brushing. The design of first soaking and softening the cleaning agent before rotating mechanical brushing significantly improves the efficiency of removing mixed dirt from the inner wall of the saliva suction tube.

[0011] Preferably, the surface of the cleaning sleeve is provided with a brush, which extends radially outward along the cleaning sleeve to contact the inner wall of the saliva suction tube. This radially extending brush design effectively increases the contact area and cleaning power with the inner wall of the saliva suction tube, enabling a more thorough removal of both softened and unsoftened dirt adhering to the tube wall, thus improving overall cleaning performance. The brush structure helps to reach deep into the microscopic unevenness of the tube's inner wall, enhancing scraping ability, avoiding blind spots, and ensuring a uniform and comprehensive cleaning process. This design is suitable for maintaining saliva suction tubes of different inner diameters and curvatures.

[0012] Preferably, the hollow rotating rod has multiple liquid outlet holes on its tube wall, allowing rinsing water entering the hollow rotating rod cavity through the handheld part to pass through the outlet holes and enter the saliva suction tube. The outlet holes allow the rinsing water to spread evenly circumferentially from the rotating hollow rotating rod cavity, ensuring that the rinsing water covers the target cleaning section along the axial direction of the saliva suction tube, washing away dirt while the brush rotates, thus improving the brushing efficiency.

[0013] Preferably, the cleaning sleeve has a flexible, elongated cylindrical structure with overflow holes on its circumferential sidewalls. When the cleaning sleeve is detachably fitted onto the outer wall of the hollow rotating rod, the position of the overflow holes corresponds to the liquid outlet holes of the hollow rotating rod. The flexible, elongated cylindrical structure ensures that the cleaning sleeve fits tightly against the outer wall of the hollow rotating rod, maintaining the relative positional stability of the two during rotation and ensuring that the overflow holes are always precisely aligned with the liquid outlet holes. The detachable design of the cleaning sleeve facilitates quick replacement when dirt clogs the overflow holes or the bristles wear out, maintaining the efficiency of detergent release and the scrubbing effect.

[0014] Preferably, the handheld part is equipped with a main unit, and the output shaft of the motor built into the main unit is connected to the rotating head at the far end of the main unit to drive it to rotate axially. The motor directly drives the rotating head to rotate axially through the output shaft, accurately transmitting power to the hollow rotating rod connected to the rotating head, ensuring that the rotation axis of the cleaning sleeve is aligned with the axis of the saliva suction tube, and avoiding cleaning dead corners caused by eccentric rotation during the brushing process.

[0015] Preferably, the rotating head is provided with a connector for detachably connecting the proximal end of the hollow rotating rod, wherein the rotation axis of the rotating head coincides with the axis of the hollow rotating rod. The detachable connection between the connector and the hollow rotating rod connector enables quick assembly and disassembly of the cleaning module, facilitating maintenance and replacement. Furthermore, this coaxial structure ensures a sealed connection between the internal liquid / gas interface of the rotating head and the hollow rotating rod, allowing for reliable transmission of cleaning agent and gas even under dynamic rotation conditions.

[0016] Preferably, the handheld unit is connected to a liquid inlet hose, one end of which is connected to a pressurized water source for rinsing dirt, and the other end is connected to a connector via a channel inside the handheld unit. This technical solution achieves a stable delivery of rinsing fluid from an external water source to the cleaning components by connecting one end of the liquid inlet hose to a pressurized water source and the other end to the connector via an internal channel in the handheld unit. This structure provides a continuous and controllable flow of rinsing fluid for the cleaning process, allowing rinsing to be performed simultaneously with brushing without interrupting operation, effectively removing brushed-off dirt, thereby improving cleaning efficiency and ensuring operational continuity.

[0017] Preferably, the handle is equipped with function buttons, which are electrically connected to the main unit. When holding the handle with one hand, the function buttons can be directly triggered by the thumb, allowing simultaneous control of the cleaning agent injection, rotation brushing, and fixation release processes without changing the holding posture, significantly improving operational continuity.

[0018] Preferably, the cleaning unit includes an observation rod; after the inner tube, hollow rotating rod, and cleaning sleeve are removed from the handheld part, the observation rod is detachably connected to the handheld part. The distal end of the observation rod is equipped with a camera component for imaging the inside of the saliva suction tube. After removing the inner tube, hollow rotating rod, and cleaning sleeve, connecting the observation rod converts the cleaning brush to endoscopic detection mode. The camera component at the distal end of the observation rod can directly extend into the target cleaning section of the saliva suction tube, acquiring high-definition images of the tube's inner wall in real time after cleaning, providing operators with intuitive visual evidence of the dirt removal effect.

[0019] Preferably, the sidewall of the hollow rotating rod is provided with several radial protrusions along the axial direction, and the cleaning sleeve is correspondingly provided with matching holes whose diameters are adapted to the size of the protrusions. The cleaning sleeve is installed on the outside of the hollow rotating rod by fitting the matching holes onto the protrusions. This technical solution achieves a reliable connection between the cleaning sleeve and the hollow rotating rod through the sleeved engagement of the protrusions and matching holes. It effectively transmits torque and prevents the cleaning sleeve from sliding relative to or falling off the hollow rotating rod during rotation, thereby ensuring the stability and reliability of the cleaning operation and improving cleaning efficiency. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of a preferred oral cavity treatment table suction tube cleaning brush according to this utility model;

[0021] Figure 2 This is a schematic diagram of a preferred cleaning sleeve installed on the surface of the hollow rotating rod according to this utility model;

[0022] Figure 3 This is a schematic diagram of a preferred end of the observation rod according to the present invention;

[0023] Figure 4 This is a schematic diagram of a preferred inner tube end of the present invention;

[0024] Figure 5 This is a schematic diagram of a preferred embodiment of the present invention, in which the inner tube is connected to the handheld part and extends into the saliva suction tube.

[0025] Figure 6 This is a schematic diagram of a preferred expansion soaking method according to this utility model;

[0026] Figure 7 This is a schematic diagram of a preferred brushing and rinsing method according to this utility model;

[0027] Figure 8 This is a schematic diagram of a preferred embodiment of the present invention, in which the observation rod for acquiring photographic images is connected to the handheld part and a saliva tube is inserted.

[0028] Figure 9This is a schematic diagram of a preferred embodiment of the present invention, showing the connection between the end of the inner tube and the liquid bladder.

[0029] Figure 10 This is a schematic diagram of the internal structure of a preferred handheld part of this utility model.

[0030] List of reference numerals

[0031] 100: Cleaning section; 110: Inner tube; 111: Liquid bladder; 112: Matching end; 113: Filling tube; 120: Hollow rotating rod; 121: Liquid outlet; 122: Connector; 123: Protrusion; 130: Cleaning sleeve; 131: Overflow hole; 132: Brush; 140: Observation rod; 141: Camera assembly; 142: Contact head; 200: Handheld part; 210: Main unit; 211: Rotating head; 212: Plug; 213: Liquid inlet hose; 214: Touch panel; 215: Cable; 220: Handle; 221: Function button; 222: Display screen; 300: Saliva suction tube. Detailed Implementation

[0032] The present invention will now be described in detail with reference to the accompanying drawings.

[0033] Directional definition: See Figure 1 The end where the handheld part 200 of the cleaning brush is located is the proximal end, and the end where the cleaning part 100 is located is the distal end.

[0034] Example 1

[0035] This embodiment relates to a cleaning brush for the saliva suction tube of a dental chair, used to clean dirt adhering to the inner wall of the saliva suction tube 300. For example... Figure 1 As shown, the cleaning brush mainly includes a cleaning section 100 and a handheld section 200. The operator holds the handheld section 200 and inserts the long, rod-shaped cleaning section 100 into the saliva suction tube 300 to perform cleaning operations. The cleaning section 100 is connected to the proximal end of the handheld section 200 and its structure includes an inner tube 110, a hollow rotating rod 120, and a cleaning sleeve 130. These three components can be selectively and detachably connected to the handheld section 200 to achieve different functions. The inner tube 110 is used to fix the cleaning section 100 inside the saliva suction tube 300 to form a space for the cleaning agent to soak dirt; the hollow rotating rod 120 is used to rotate axially under the drive of the handheld section 200, thereby driving the cleaning sleeve 130, which is fitted outside the hollow rotating rod 120, to rotate synchronously; the cleaning sleeve 130 can then use this rotation to brush away the dirt softened by the cleaning agent from the inner wall of the saliva suction tube 300.

[0036] Combination Figure 1 and Figure 4The inner tube 110 is configured as a hollow thin rod, the mating end 112 of which is detachably connected to the pre-set insertion interface 212 at the distal end of the handheld part 200, and a liquid bladder 111 is connected to the distal end. The liquid bladder 111 is made of a corrosion-resistant and low-permeability flexible material (such as medical-grade silicone), and can withstand hydraulic pressure and maintain a sealed shape after being filled with water and expanded. Figure 9 The internal structure of the distal end of the inner tube 110 is shown. The lumen of the distal end of the inner tube 110 is provided with multiple filling tubes 113 that are in fluid communication with the liquid bladder 111 in the radial direction, so that the liquid bladder 111 can be rapidly filled and expanded by increasing the number of channels in fluid communication between the inner tube 110 and the liquid bladder 111.

[0037] Preferably, such as Figure 1 As shown, the handheld part 200 is connected to a liquid inlet hose 213, which can be connected to an external pressurized water source (such as a water pump, faucet, etc.) for rinsing dirt. The handheld part 200 has an internal channel connecting the liquid inlet hose 213 and the insertion port 212. When the inner tube 110 is inserted into a predetermined position within the saliva suction tube 300 to be cleaned, the operator can fill the liquid bladder 111 with liquid through the liquid flow channel formed by the aforementioned channel, the liquid inlet hose 213, and the lumen of the inner tube 110, causing it to expand. After expansion, the liquid bladder 111 abuts against the inner wall of the saliva suction tube 300, and the resulting fastening force secures the entire cleaning part 100 to the predetermined position. Preferably, this predetermined position refers to the position where the effective cleaning range of the cleaning part 100 in the axial direction covers the target cleaning section (i.e., the section with dirt deposits) within the saliva suction tube 300.

[0038] Preferably, see Figure 6 The expanded liquid bladder 111 can also form a circumferential seal with the inner wall of the suction tube 300, reliably isolating the tube and thus creating a cleaning agent containing space near the proximal end of the liquid bladder 111 (on the side closer to the handheld part 200). After the operator manually fills this space with cleaning agent from the outside of the suction tube 300, the dirt deposited on the inner wall of the suction tube 300 corresponding to this space can be fully soaked and dissolved, creating favorable conditions for the subsequent brushing operation of the cleaning part 100.

[0039] like Figure 1 As shown, the hollow rotating rod 120 of the cleaning unit 100 is in the shape of a hollow round rod, with a connector 122 at its proximal end, which can be detachably connected to the pre-set insertion interface 212 at the distal end of the handheld unit 200. Through this connection, the internal cavity of the hollow rotating rod 120 can also be in fluid communication with the liquid inlet hose 213 configured on the handheld unit 200. More preferably, as Figure 1As shown, the hollow rotating rod 120 is also provided with liquid outlet holes 121 on its tube wall. These liquid outlet holes 121 are preferably evenly distributed in the axial direction, so that the rinsing water filled into the inner cavity can enter the saliva suction tube 300 through the liquid outlet holes 121, thereby enabling the water to remove dirt in time during subsequent dirt removal and avoiding residue.

[0040] like Figure 1 As shown, the handheld part 200 includes a handle 220 and a main unit 210 connected to each other. The handle 220 is designed for easy gripping by the operator, and the main unit 210 houses a motor. The output shaft of the motor is connected to a rotating head 211 located at the distal end of the main unit 210, and the motor drives the rotating head 211 to rotate when started. Preferably, the pre-set insertion interface 212 at the distal end of the aforementioned handheld part 200 is located on the end face of the rotating head 211, wherein the rotation axis of the rotating head 211 coincides with the axis of the hollow rotating rod 120. Therefore, when the rotating head 211 rotates, the hollow rotating rod 120 connected to its insertion interface 212 also rotates axially.

[0041] like Figure 1 As shown, the cleaning sleeve 130 of the cleaning unit 100 is an elastic, long, cylindrical soft sleeve structure that can be elastically fitted onto the outer wall of the hollow rotating rod 120. For example... Figure 2 As shown, the circumferential sidewall of the cleaning sleeve 130 is provided with overflow holes 131, the number and position of which correspond to the liquid outlet holes 121 on the circumferential sidewall of the hollow rotating rod 120. These holes allow rinsing water in the inner cavity of the hollow rotating rod 120 to flow sequentially into the saliva suction tube 300 through the liquid outlet holes 121 and the overflow holes 131. Furthermore, in conjunction with... Figure 1 and Figure 2 As can be seen, the side wall of the hollow rotating rod 120 is provided with multiple radial protrusions 123 along the axial direction, and the cleaning sleeve 130 is provided with matching holes whose diameter is adapted to the size of the protrusions 123. By fitting the matching holes onto the protrusions 123, the cleaning sleeve 130 can be more securely installed on the outside of the hollow rotating rod 120, effectively preventing the two from sliding relative to each other.

[0042] like Figure 2 As shown, the cleaning sleeve 130 is axially arranged with multiple brushes 132, which have a radially outwardly expanding shape, so that when the cleaning part 100 reaches the predetermined position, the brushes 132 can contact the inner wall of the saliva suction tube 300. Preferably, as Figure 6 As shown, after the dirt on the inner wall of the saliva suction tube 300 is fully dissolved by the cleaning agent, the motor in the main unit 210 drives the rotating head 211 to rotate, causing the cleaning sleeve 130 to rotate synchronously with the hollow rotating rod 120. At this time, the brush 132 can brush away the dissolved dirt on the inner wall of the saliva suction tube 300, thereby improving the cleaning effect. The cleaning sleeve 130 is a consumable and can be detached from the hollow rotating rod 120 after use and replaced with a new cleaning sleeve 130.

[0043] In summary, this utility model of a dental treatment unit saliva suction tube cleaning brush, by installing corresponding cleaning components at different stages, can achieve a thorough and complete cleaning of the saliva suction tube. Specifically, see... Figure 5 The inner tube 110 of the cleaning unit 100 can be initially connected to the handheld part 200. By filling the inner tube 110 with rinsing water, the liquid sac 111 at its end expands, thereby fixing the cleaning unit 100 inside the saliva suction tube 300, forming a space for containing cleaning agent and soaking dirt. See then... Figure 6 The operator can inject cleaning agent into the space from the outside of the saliva suction tube 300 and maintain it for a certain period of time to fully soften the dirt on the inner wall of the saliva suction tube 300. Afterwards, see... Figure 7 Remove the inner tube 110 from the handle 200 to drain the cleaning agent, and replace it with a hollow rotating rod 120 fitted with a cleaning sleeve 130, which is then connected to the handle. Driven by the handle 200, the hollow rotating rod 120 rotates axially. Simultaneously, with the aid of an external pressurized water source, the cleaning sleeve 130 brushes away softened dirt from the inner wall of the saliva suction tube 300 during rotation, and rinses it at the same time, thereby further improving the cleaning effect.

[0044] Example 2

[0045] This embodiment is a further improvement on the foregoing embodiment, and repeated content will not be described again.

[0046] To assist operators in evaluating the cleaning effect of the saliva suction tube 300, this embodiment relates to an observation rod 140 that can conveniently acquire photographic images of the inner wall of the cleaned saliva suction tube 300. For example... Figure 8 As shown, after the inner tube 110, hollow rotating rod 120 and cleaning sleeve 130 are removed from the handheld part 200, the observation rod 140 of the cleaning part 100 can establish an electrical connection with the main unit 210 of the handheld part 200.

[0047] like Figure 1 As shown, a camera assembly 141, including a camera and a light source, is located near the observation rod 140, facilitating the acquisition of images after cleaning within the dimly lit suction tube 300, providing operators with a basis for judging whether the cleaning effect meets the standards. Figure 3 As shown, the observation rod 140 has a contact head 142 at its distal end. When the operator attaches the observation rod 140 to the end of the handheld part 200, the contact head 142 is electrically connected to the contact plate 214 inside the main unit 210 of the handheld part 200. Preferably, as shown... Figure 10 As shown, the handheld unit 200 is also equipped with a display screen 222 at its near end. The display screen 222 is electrically connected to the touch panel 214 in the main unit 210 via a cable 215, and is used to display the images captured by the camera component 141 for the operator to view intuitively.

[0048] like Figure 1As shown, the handle 220 of the handheld part 200 is equipped with function buttons 221 electrically connected to the main unit 210. These function buttons 221 can be physical buttons. The electrical signals generated by pressing the function buttons 221 are transmitted to the control circuit inside the main unit 210. The control circuit generates corresponding control commands based on the received signals to drive the motor or switch the power supply on and off to the camera component 141 of the observation rod 140. The main unit 210 integrates the control functions of the motor and the camera component 141. The signal interaction logic between the function buttons 221 and the control circuit inside the main unit 210 is a mature electronic control technology and can be directly implemented using common solutions from existing medical equipment or industrial controllers. For example, the Olympus CV-190 endoscope system can be used to control the camera, or the Siemens S7-1200 PLC can be used to manage the start and stop of the motor through the HMI panel. The innovation of this utility model lies in the mechanical structure of the cleaning part 100; the electronic control part of the main unit 210 is not the focus of improvement in this utility model.

[0049] It should be noted that the above specific embodiments are exemplary. Those skilled in the art can devise various solutions inspired by the disclosure of this utility model, and these solutions all fall within the scope of this utility model and its protection scope. Those skilled in the art should understand that this utility model specification and its drawings are illustrative and do not constitute a limitation on the claims. The protection scope of this utility model is defined by the claims and their equivalents. Throughout the text, features introduced by "preferred" are merely optional and should not be construed as mandatory. Therefore, the applicant reserves the right to abandon or delete relevant preferred features at any time.

Claims

1. A cleaning brush for a saliva suction tube in a dental treatment unit, comprising a cleaning section (100) for cleaning the inside of a saliva suction tube (300) and a handheld section (200) connected to the proximal end of the cleaning section (100), wherein the cleaning section (100) comprises an inner tube (110), a hollow rotating rod (120), and a cleaning sleeve (130), characterized in that, When the inner tube (110) is connected to the handheld part (200), the handheld part (200) fills the liquid sac (111) at the distal end of the inner tube (110) with liquid so that it expands and abuts against the inner wall of the saliva suction tube (300), thereby fixing the inner tube (110) in the predetermined position, and by severing the saliva suction tube (300), a space is formed on the proximal side of the liquid sac (111) that allows cleaning agent to be injected; When the hollow rotating rod (120) is connected to the handheld part (200), the hollow rotating rod (120) rotates axially under the drive of the handheld part (200), causing the cleaning sleeve (130) sleeved on the outer wall of the hollow rotating rod (120) to rotate synchronously, so that the cleaning sleeve (130) brushes away the dirt softened by the cleaning agent on the inner wall of the saliva suction tube (300).

2. The cleaning brush according to claim 1, characterized in that, The surface of the cleaning sleeve (130) is provided with a brush (132), which extends radially outward along the cleaning sleeve (130) to contact the inner wall of the saliva suction tube (300).

3. The cleaning brush according to claim 1, characterized in that, The hollow rotating rod (120) has multiple liquid outlet holes (121) on its tube wall. The rinsing water that enters the inner cavity of the hollow rotating rod (120) through the handheld part (200) can pass through the liquid outlet holes (121) and enter the saliva suction tube (300).

4. The cleaning brush according to claim 3, characterized in that, The cleaning sleeve (130) has an elastic long cylindrical structure and an overflow hole (131) is provided on its circumferential sidewall. When the cleaning sleeve (130) is detachably sleeved on the outer wall of the hollow rotating rod (120), the position of the overflow hole (131) corresponds to the liquid outlet hole (121) of the hollow rotating rod (120).

5. The cleaning brush according to claim 1, characterized in that, The handheld part (200) is equipped with a main unit (210), and the output shaft of the motor built into the main unit (210) is connected to the rotating head (211) at the far end of the main unit (210) to drive it to rotate axially.

6. The cleaning brush according to claim 5, characterized in that, The rotating head (211) is provided with a plug interface (212) for detachably connecting the proximal connector (122) of the hollow rotating rod (120), wherein the rotation axis of the rotating head (211) coincides with the axis of the hollow rotating rod (120).

7. The cleaning brush according to claim 6, characterized in that, The handheld part (200) is connected to a liquid inlet hose (213), one end of which is connected to a pressurized water source for rinsing dirt, and the other end is connected to the plug interface (212) through a channel configured inside the handheld part (200).

8. The cleaning brush according to claim 5, characterized in that, The handle (220) of the handheld part (200) is provided with a function button (221), which is electrically connected to the host (210).

9. The cleaning brush according to claim 1, characterized in that, The cleaning unit (100) includes an observation rod (140); After the inner tube (110), the hollow rotating rod (120), and the cleaning sleeve (130) are removed from the handle (200), the observation rod (140) can be detachably connected to the handle (200). The observation rod (140) is equipped with a camera component (141) at its distal end for taking pictures inside the saliva tube (300).

10. The cleaning brush according to claim 1, characterized in that, The hollow rotating rod (120) has a plurality of radial protrusions (123) along its axial direction on its side wall, and the cleaning sleeve (130) has corresponding matching holes with the size of the protrusions (123). The cleaning sleeve (130) is mounted on the outside of the hollow rotating rod (120) by means of fitting a matching hole onto the protrusion (123).

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