Oral cavity dilator for department of stomatology

Abstract

The oral cavity dilator comprises an attached type wearing ring, position regulators, an automatic adjusting distraction assembly and an oral cavity fluid suction mechanism, the two ends of the attached type wearing ring are connected with the two sets of position regulators respectively, the ends of the position regulators are connected with the automatic adjusting distraction assembly, and the automatic adjusting distraction assembly is connected with the oral cavity fluid suction mechanism. The oral liquid suction mechanism is mounted on the attached wearing ring, a controller is arranged on the left side of the attached wearing ring, the attached wearing ring comprises an arc-shaped plate and elastic attaching plates symmetrically mounted at the two ends of the arc-shaped plate, a tube bank groove is formed in the inner side of each elastic attaching plate, and the position adjuster comprises a mounting seat, a floating adjusting column and a transverse plate. The mounting base is fixed to the outer end of the elastic attaching plate, and the floating adjusting column is mounted on the mounting base. The oral cavity dilator designed by the invention can be used for automatically dilating the oral cavity of a patient at two sides and stable angles and efficiently cleaning oral cavity fluid, so that the oral cavity treatment efficiency is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of oral medical devices, and particularly to an oral retractor for stomatology. Background Art

[0002] Stomatology is one of the classifications of medical disciplines. The main stomatological diseases include: dermoid cyst of oral and maxillofacial region, submandibular space infection of epidermis, lymphangioma of maxillofacial region, odontoid process dysplasia, malignant tumor of maxillary sinus, ameloblastoma of jaw, chronic ethmoiditis, mandibular retrognathia, tetracycline teeth, leukoplakia of tongue and other diseases. Through technology, many periodontal diseases can be completely cured. The development of tissue bioengineering technologies such as guided tissue regeneration technology, gene technology, dental implants, etc. brings exciting hopes for the regeneration of diseased teeth. However, the treatment of periodontal diseases must be a sequential treatment. In the treatment process, formulating a detailed and effective treatment plan, the doctor's meticulous and excellent treatment, and the patient's active cooperation are the keys to the success of the treatment. When performing surgical treatment on the patient's oral cavity, it is often necessary to cooperate with an oral retractor to support the oral cavity to facilitate the doctor's treatment of the oral cavity.

[0003] However, the existing oral retractors for stomatology have the following problems in the process of use: the existing retractors usually require medical staff to adjust the angle and perform the retraction treatment, with a low degree of automation. During the treatment process when the patient wears the retractor, long-term wearing will cause excessive stretching of oral soft tissues, resulting in muscle fatigue and soreness, and further leading to an increase in saliva secretion. Also, during the oral treatment process, it is necessary to clean the oral cavity, generating cleaning fluid, and the patient needs to independently spit out the saliva and cleaning fluid in the oral cavity every once in a while, which affects the efficiency of oral treatment. Therefore, corresponding technical solutions need to be designed to solve the existing technical problems. Summary of the Invention

[0004] The purpose of the present invention is to provide an oral retractor for stomatology, which solves the technical problem that the existing retractors usually require medical staff to adjust the angle and perform the retraction treatment, with a low degree of automation. During the treatment process when the patient wears the retractor, long-term wearing will cause excessive stretching of oral soft tissues, resulting in muscle fatigue and soreness, and further leading to an increase in saliva secretion. Also, during the oral treatment process, it is necessary to clean the oral cavity, generating cleaning fluid, and the patient needs to independently spit out the saliva and cleaning fluid in the oral cavity every once in a while, which affects the efficiency of oral treatment.

[0005] To achieve the above object, the present invention provides the following technical solution: An oral retractor for stomatology, comprising an attached wearing ring, a position adjuster, an automatic adjustment retracting assembly, and an oral fluid suction mechanism. The two ends of the attached wearing ring are respectively connected to two groups of position adjusters. The end of the position adjuster is connected to the automatic adjustment retracting assembly. The oral fluid suction mechanism is installed on the attached wearing ring, and a controller is provided on the left side of the attached wearing ring;

[0006] The attached wearing ring includes an arc-shaped plate and elastic attachment plates symmetrically installed at both ends of the arc-shaped plate. A row of pipe grooves is formed by machining on the inner side of the elastic attachment plates;

[0007] The position adjuster includes a mounting seat, a floating adjustment column, and a cross plate. The mounting seat is fixed to the outer end of the elastic attachment plate. The floating adjustment column is installed on the mounting seat. One end of the cross plate is rotatably sleeved on the floating adjustment column, and an installation opening is provided at the other end. The automatic adjustment retracting assembly is installed at the installation opening;

[0008] The automatic adjustment retracting assembly includes a retractor, an angle adjuster, a limiter, and an identification camera. The retractor is installed at the inner end of the cross plate and includes two groups of retracting rods arranged in a cross shape and a bite block fixed to the end of the retracting rod. A pin is inserted through the intersection of the two groups of retracting rods. The end of one group of retracting rods is connected to the cross plate, and the end of the other group of retracting rods is movably arranged in the installation opening. The angle adjuster is installed in the installation opening and is used in cooperation with the retracting rod. The limiter is located below the angle adjuster. The identification camera is installed on the cross plate and the shooting end is directly opposite to the angle adjuster;

[0009] The oral fluid suction mechanism includes a liquid storage container, a micro pump, a liquid suction pipe, and a deformable suction head. The micro pump is installed on the liquid storage container and the liquid suction end is connected to the liquid suction pipe. The liquid suction pipe is laid in the row of pipe grooves. The deformable suction head is installed at the inner end of the cross plate and is communicated with the liquid suction pipe.

[0010] As a preferred embodiment of the present invention, the elastic attachment plate is made of elastic rubber material, and a number of deformation grooves are formed by machining at the connection with the arc-shaped plate. The number of deformation grooves is distributed in a stacked manner.

[0011] As a preferred embodiment of the present invention, the floating adjustment column includes a sleeve with a number of limit holes formed on the surface and a pull rod movably sleeved in the sleeve. An elastic limit protrusion is provided on one side of the pull rod, and the elastic limit protrusion is used in cooperation with the limit holes.

[0012] As a preferred embodiment of the present invention, the bite block has a frustum-shaped structure and anti-slip lines are formed by machining on the surface. The anti-slip lines have a corrugated structure.

[0013] As a preferred embodiment of the present invention, the angle adjuster includes a motor, a rotating disk, a toggle block and a contact rod. The motor is installed on the horizontal plate and the power output end is connected to the rotating disk. The edge of the rotating disk is processed to have a plurality of groups of slots and angle scale lines. The toggle block is fixed to the edge of the rotating disk and is used in conjunction with the contact rod. The contact rod has an arc-shaped structure and the upper end is connected to a movably arranged support rod.

[0014] As a preferred embodiment of the present invention, the toggle block is in a fan-shaped structure and the width of one end is smaller than the width of the other end, and the toggle block is in contact with the contact rod.

[0015] As a preferred embodiment of the present invention, the limiter includes a shell, an electromagnet, an iron block, a plug and a spring. The shell is fixed on the horizontal plate, the electromagnet is built into the shell and is externally connected to a power supply, the iron block is located above the electromagnet block, the plug is installed on the iron block and is used in conjunction with the slot, and the springs are divided into two groups, and the upper and lower ends of the two groups of springs are connected to the electromagnet and the iron block.

[0016] As a preferred embodiment of the present invention, the deformable suction head comprises a tube body and a curved tube fixed to an end of the tube body, and the end of the tube body is processed and formed into a stacked structure.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] 1. The present invention designs an oral stretcher for oral stretching treatment, the oral stretcher comprises an attached wearing ring, a position adjuster, an automatically adjustable stretching assembly and an oral fluid suction mechanism. When oral treatment is required for a patient, a medical staff wears the attached wearing ring on the patient's head and wears both sides of the attached wearing ring on the patient's face, adjusts the position of the automatically adjustable stretching assembly by the position adjuster and places it on both sides of the oral cavity, so that the stretcher of the automatically adjustable stretching assembly is placed in the oral cavity and contacts with the molars, sets an adjustable stretching angle, and automatically stretches the angle of the stretcher by the automatically adjustable stretching assembly, so as to achieve the purpose of automatically stretching the opening angle of the patient's oral cavity. In addition, the oral fluid suction mechanism places a suction tube in the patient's oral cavity. During the treatment of the patient, the oral fluid suction mechanism sucks and conducts the liquid generated by oral rinsing and oral secretions to ensure the smooth progress of the oral treatment and improve the efficiency of the oral treatment.

[0019] 2. The oral cavity stretcher designed in the present invention can realize automatic bilateral stable angle stretching of the patient's oral cavity and efficiently clean the oral fluid, thereby improving the efficiency of oral treatment. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is the overall structure diagram of the present invention;

[0021] Figure 2 This is the distribution structure diagram of the spreader and angle adjuster described in the present invention;

[0022] Figure 3 This is the structure diagram of the limiter described in the present invention;

[0023] Figure 4 This is the structure diagram of the deformable suction head described in the present invention.

[0024] In the figure: 1. Controller; 2. Arc plate; 3. Elastic attachment plate; 4. Pipe row groove; 5. Mounting seat; 6. Floating adjustment column; 7. Horizontal plate; 8. Mounting port; 9. Spreader; 10. Angle adjuster; 11. Limiter; 12. Identification camera; 13. Spreading rod; 14. Biting block; 15. Liquid storage container; 16. Micro pump; 17. Liquid suction pipe; 18. Deformable suction head; 19. Deformation groove; 20. Limiting hole; 21. Sleeve; 22. Pull rod; 23. Elastic limiting protrusion; 24. Anti-slip pattern; 25. Motor; 26. Rotating disk; 27. Dialing block; 28. Contact rod; 29. Card slot; 30. Angle scale line; 31. Outer shell; 32. Electromagnet; 33. Iron block; 34. Insert rod; 35. Spring; 36. Pipe body; 37. Elbow pipe. Detailed implementation manners

[0025] 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 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.

[0026] Please refer to Figures 1-4 , the present invention provides a technical solution: An oral spreader for stomatology, including an attachment type wearing ring, a position adjuster, an automatic adjustment spreading component and an oral liquid suction mechanism. The two ends of the attachment type wearing ring are respectively connected to two groups of position adjusters. The end of the position adjuster is connected to the automatic adjustment spreading component. The oral liquid suction mechanism is installed on the attachment type wearing ring. A controller 1 is provided on the left side of the attachment type wearing ring;

[0027] The attachment type wearing ring includes an arc plate 2 and elastic attachment plates 3 symmetrically installed at both ends of the arc plate 2. A pipe row groove 4 is formed by machining on the inner side of the elastic attachment plate 3;

[0028] The position adjuster includes a mounting base 5, a floating adjustment column 6 and a cross plate 7. The mounting base 5 is fixed to the outer end of the elastic attachment plate 3. The floating adjustment column 6 is installed on the mounting base 5. One end of the cross plate 7 is rotatably sleeved on the floating adjustment column 6 and the other end is provided with a mounting opening 8. The automatic adjustment and expansion assembly is installed at the mounting opening 8, which is convenient for adjusting the position of the automatic adjustment and expansion assembly;

[0029] The automatic adjustment and expansion assembly includes an expander 9, an angle adjuster 10, a stopper 11 and an identification camera 12. The expander 9 is installed at the inner end of the cross plate 7 and includes two groups of expansion rods 13 arranged in a cross shape and a bite block 14 fixed to the end of the expansion rod 13. A pin is inserted through the intersection of the two groups of expansion rods 13. One end of one group of expansion rods 13 is connected to the cross plate 7, and the end of the other group of expansion rods 13 is movably arranged in the mounting opening 8. The angle adjuster 10 is installed in the mounting opening 8 and is used in cooperation with the expansion rod 13. The stopper 11 is located below the angle adjuster 10. The identification camera 12 is installed on the cross plate 7 and the shooting end faces the angle adjuster 10. The angle adjuster 10 assists in the expansion operation of the expander 9 and is limited by the stopper 11. At the same time, the identification camera 12 is used to obtain an image of the opening angle;

[0030] The oral fluid suction mechanism includes a liquid storage container 15, a micro pump 16, a liquid suction pipe 17 and a deformable suction head 18. The micro pump 16 is installed on the liquid storage container 15 and the liquid suction end is connected to the liquid suction pipe 17. The liquid suction pipe 17 is laid in the pipe slot 4. The deformable suction head 18 is installed at the inner end of the cross plate 7 and is communicated with the liquid suction pipe 17. The micro pump 16 is used to suck the cleaning liquid and secretion generated during oral treatment. The cleaning liquid and secretion enter the liquid storage container 15 along the deformable suction head 18 and the liquid suction pipe 17 to achieve the purpose of collection.

[0031] Further improved, as Figure 1 shown, the elastic attachment plate 3 is made of elastic rubber material and several groups of deformation grooves 19 are formed at the connection with the arc plate 2. The several groups of deformation grooves 19 are distributed in a stacked manner, so that the elastic attachment plate 3 has a force towards the inside, making the elastic attachment plate 3 better adhere to the face.

[0032] Further improved, as Figure 1As shown in the figure, the floating adjustment column 6 includes a sleeve 21 with a plurality of groups of limit holes 20 formed on its surface and a pull rod 22 movably nested in the sleeve 21. An elastic limit protrusion 23 is provided on one side of the pull rod 22, and the elastic limit protrusion 23 is used in cooperation with the limit hole 20. When it is necessary to adjust the position of the automatic adjustment expansion component, the user presses the elastic limit protrusion 23 to disengage from the limit hole 20. At this time, the pull rod 22 can be pulled and adjusted. When the appropriate height is adjusted, the pressing of the elastic limit protrusion 23 is released, and the elastic limit protrusion 23 pops out and snaps into the corresponding limit hole 20 to achieve the purpose of limiting.

[0033] Further improved, as Figure 2 shown, the occluding block 14 has a frustum-shaped structure and anti-slip lines 24 are formed on its surface. The anti-slip lines 24 have a corrugated structure. The occluding block 14 contacts the molars, and the anti-slip purpose can be achieved through the anti-slip lines 24.

[0034] Further improved, as Figure 2 shown, the angle adjuster 10 includes a motor 25, a rotating disk 26, a toggle block 27, and a contact rod 28. The motor 25 is installed on the cross plate 7 and its power output end is connected to the rotating disk 26. A plurality of groups of card slots 29 and angle scale lines 30 are formed on the edge of the rotating disk 26. The toggle block 27 is fixed to the edge of the rotating disk 26 and is used in cooperation with the contact rod 28. The contact rod 28 has an arc-shaped structure and its upper end is connected to the movably arranged expansion rod 13. When it is necessary to adjust the expansion angle of the expansion rod 13, the motor 25 drives the rotating disk 26 to rotate. During the rotation of the rotating disk 26, the toggle block 27 acts on the contact rod 28, causing the contact rod 28 to rotate and thus adjusting the angle of the expansion rod 13.

[0035] Further improved, as Figure 2 shown, the toggle block 27 has a fan-shaped structure and the width of one end is smaller than that of the other end. The toggle block 27 contacts the contact rod 28. Such a design method facilitates the toggle block 27 to act on the contact rod 28 during rotation, causing the contact rod 28 to rotate and thus adjusting the angle of the expansion rod 13.

[0036] Further improved, as Figure 3As shown in the figure, the stopper 11 includes a housing 31, an electromagnet 32, an iron block 33, a plug rod 34 and a spring 35. The housing 31 is fixed on the cross plate 7. The electromagnet 32 is built in the housing 31 and is externally connected to a power supply. The iron block 33 is located above the electromagnet block. The plug rod 34 is installed on the iron block 33 and is used in cooperation with the card slot 29. There are two groups of springs 35. The upper and lower ends of the two groups of springs 35 are connected to the electromagnet 32 and the iron block 33 respectively. When the electromagnet 32 is energized, it generates magnetism and adsorbs the iron block 33, causing the iron block 33 to move towards the electromagnet 32. During the movement, the spring 35 is compressed and the plug rod disengages from the card slot 29. At this time, the angle of the angle adjuster 10 can be adjusted. When the power is off, under the action of the spring 35, the iron block 33 resets and the plug rod 34 is inserted into the corresponding card slot 29 to achieve the purpose of limiting the rotation disc 26.

[0037] Specifically, the deformable suction head 18 includes a pipe body 36 and a bent pipe 37 fixed to the end of the pipe body 36. The end of the pipe body 36 is formed into a laminated structure, and the pipe body 36 can be deformed and bent according to needs, so that the end of the bent pipe 37 is placed on the lower wall of the oral cavity, which is convenient for sucking the generated cleaning liquid and secretion liquid.

[0038] During use: when oral treatment is required for the patient, the medical staff places the attached wearing ring on the back of the patient's head and wears it, and the elastic attached plate 3 is attached to the patient's face. The patient keeps the oral cavity open autonomously. At this time, the medical staff adjusts the position of the automatic adjustment and expansion component. The user presses the elastic limiting protrusion 23 to disengage the limiting hole 20. At this time, the pull rod 22 can be pulled out and adjusted. When it is adjusted to an appropriate height, the pressing of the elastic limiting protrusion 23 is abandoned. The elastic limiting protrusion 23 pops out and is inserted into the corresponding limiting hole 20 to achieve the purpose of limiting. The angle of the cross plate 7 can be adjusted as needed, and the position of the automatic adjustment and expansion component is further adjusted so that the expander 9 can be placed on both sides of the patient's oral cavity. Then the medical staff sets the expansion angle through the controller 1. After the setting is completed, the controller 1 controls the electromagnet 32 to generate magnetism and adsorb the iron block 33 when it is powered on, so that the iron block 33 moves to one side of the electromagnet 32. During the movement, the spring 35 squeezes The rotation of the rotating disk 26 is driven by the motor 25, and the toggle block 27 acts on the contact rod 28 during the rotation, so that the contact rod 28 rotates and the angle of the opening rod 13 is adjusted. The two groups of bite blocks 14 on the same side contact the molars respectively. When the rotating disk 26 rotates to the set angle, the recognition camera 12 recognizes and transmits the signal to the controller 1. The controller 1 controls the electromagnet 32 to cut off the power. Under the action of the spring 35, the iron block 33 is reset and the insertion rod 34 is inserted into the corresponding slot 29, so as to achieve the purpose of limiting the rotating disk 26. In addition, the tube body 36 is deformed and bent as needed, so that the end of the curved tube 37 is placed on the lower wall of the oral cavity. The cleaning liquid and secretion liquid generated during the oral treatment are sucked by the micro pump 16. The cleaning liquid and secretion liquid enter the liquid storage container 15 along the deformable suction head 18 and the liquid suction tube 17, so as to achieve the purpose of collection and ensure the smooth progress of the oral treatment.

[0039] In the description of the present invention, it is necessary to understand that the terms "coaxial", "bottom", "one end", "top", "middle", "the other end", "upper", "one side", "top", "inside", "front", "center", "both ends" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0040] In addition, the terms "first", "second", "third" and "fourth" are used for descriptive purposes only and are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, the features defined as "first", "second", "third" and "fourth" may explicitly or implicitly include at least one of such features.

[0041] In the present invention, unless otherwise clearly specified or limited, the terms "install", "set", "connect", "fix", "swivel connection", etc. shall be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components or the interaction relationship between two components. Unless otherwise clearly limited, for those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0042] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions recorded in the foregoing embodiments or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. An oral retractor for stomatology, characterized in that: It includes an attached wearing ring, a position adjuster, an automatically adjustable spreading assembly, and an oral fluid suction mechanism. The two ends of the attached wearing ring are respectively connected to two groups of position adjusters. The end of the position adjuster is connected to the automatically adjustable spreading assembly. The oral fluid suction mechanism is installed on the attached wearing ring, and a controller (1) is equipped on the left side of the attached wearing ring; The attached wearing ring includes an arc plate (2) and elastic attachment plates (3) symmetrically installed at both ends of the arc plate (2). A row of pipe grooves (4) are formed on the inner side of the elastic attachment plates (3); The position adjuster includes a mounting seat (5), a floating adjustment column (6), and a cross plate (7). The mounting seat (5) is fixed to the outer end of the elastic attachment plate (3). The floating adjustment column (6) is installed on the mounting seat (5). One end of the cross plate (7) is rotatably sleeved on the floating adjustment column (6) and an installation opening (8) is formed at the other end. The automatically adjustable spreading assembly is installed at the installation opening (8); The automatically adjustable spreading assembly includes a spreader (9), an angle adjuster (10), a limiter (11), and an identification camera (12). The spreader (9) is installed at the inner end of the cross plate (7) and includes two groups of spreading rods (13) arranged in a cross shape and a bite block (14) fixed to the end of the spreading rod (13). A pin is inserted through the intersection of the two groups of spreading rods (13). The end of one group of spreading rods (13) is connected to the cross plate (7), and the end of the other group of spreading rods (13) is movably arranged in the installation opening (8). The angle adjuster (10) is installed in the installation opening (8) and is used in cooperation with the spreading rod (13). The limiter (11) is located below the angle adjuster (10). The identification camera (12) is installed on the cross plate (7) and the shooting end is directly opposite to the angle adjuster (10); The oral fluid suction mechanism includes a liquid storage container (15), a micro pump (16), a liquid suction pipe (17), and a deformable suction head (18). The micro pump (16) is installed on the liquid storage container (15) and the liquid suction end is connected to the liquid suction pipe (17). The liquid suction pipe (17) is laid in the row of pipe grooves (4). The deformable suction head (18) is installed at the inner end of the cross plate (7) and is communicated with the liquid suction pipe (17).

2. The oral retractor for stomatology according to claim 1, wherein: The elastic attachment plate (3) is made of elastic rubber material and several groups of deformation grooves (19) are formed at the connection with the arc plate (2). The several groups of deformation grooves (19) are distributed in a stacked manner.

3. The oral retractor for stomatology according to claim 1, wherein: The floating adjustment column (6) includes a sleeve (21) with several groups of limit holes (20) formed on the surface and a pull rod (22) movably sleeved in the sleeve (21). An elastic limit protrusion (23) is arranged on one side of the pull rod (22). The elastic limit protrusion (23) is used in cooperation with the limit holes (20).

4. The oral retractor for stomatology according to claim 1, characterized in that: The bite block (14) has a frustum-shaped structure and anti-slip lines (24) are formed on the surface. The anti-slip lines (24) have a corrugated structure.

5. The oral retractor for stomatology according to claim 1, wherein: The angle adjuster (10) comprises a motor (25), a rotating disk (26), a toggle block (27) and a contact rod (28); the motor (25) is mounted on a horizontal plate (7) and a power output end is connected to the rotating disk (26); the edge of the rotating disk (26) is processed to have a plurality of groups of slots (29) and angle scale lines (30); the toggle block (27) is fixed to the edge of the rotating disk (26) and is used in conjunction with the contact rod (28); the contact rod (28) is an arc-shaped structure and the upper end is connected to a movably arranged opening rod (13).

6. The oral dilator for stomatology according to claim 5, characterized in that: The toggle block (27) is in a fan-shaped structure and has a width at one end that is smaller than a width at the other end. The toggle block (27) is in contact with a contact rod (28).

7. The oral retractor for stomatology according to claim 1, wherein: The limiter (11) comprises a housing (31), an electromagnet (32), an iron block (33), an insertion rod (34) and a spring (35); the housing (31) is fixed on the horizontal plate (7); the electromagnet (32) is built in the housing (31) and is externally connected to a power supply; the iron block (33) is located above the electromagnet block; the insertion rod (34) is installed on the iron block (33) and is used in conjunction with the card slot (29); the spring (35) is divided into two groups; the upper and lower ends of the two groups of springs (35) are connected to the electromagnet (32) and the iron block (33).

8. The oral retractor for stomatology according to claim 1, characterized in that: The deformable suction head (18) comprises a tube body (36) and a bent tube (37) fixed to the end of the tube body (36); the end of the tube body (36) is processed and formed into a stacked structure.

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