Oral cavity expanding device for oral cavity examination

Abstract

The invention discloses an oral cavity expanding and supporting device for oral cavity examination, belongs to the field of oral cavity examination, and aims to solve the problems that when a tongue depressor is directly pushed in, the tongue depressor is very easy to be in close contact with the upper surface of the tongue and generates large friction, the oral cavity of a patient is in a sensitive state when the patient is examined, and the friction can bring strong discomfort to the patient. The oral cavity expanding and supporting device for the oral cavity examination comprises a first fixing plate, an upper tooth protection groove sleeve arranged above the first fixing plate, a second fixing plate arranged below the first fixing plate and a lower tooth protection groove sleeve arranged below the second fixing plate, according to the tongue pressing device, the pushing mechanism is arranged, so that the tongue depressor can move transversely to the rear side firstly during pressing, the tongue can be pressed after fixing is completed, and compared with the prior art, friction of the tongue depressor to the tongue is reduced, and therefore the purpose of reducing damage to the tongue is achieved.

Description

Technical Field

[0001] The invention relates to the field of oral examination, and in particular to an oral expansion device for oral examination. Background Art

[0002] The oral expansion device for oral examination is a medical device specially designed for oral medical examination scenarios. It is mainly made of materials that meet medical standards and is sturdy, durable, safe and hygienic. During the actual oral examination process, the device can gently and effectively open the patient's mouth to an appropriate degree through specific structural designs, such as adjustable struts and support components that fit the contours of the mouth. This not only overcomes the patient's fatigue caused by their own muscle strength limitations or long-term mouth opening, ensuring that the mouth always remains in a stable open state, but also provides doctors with sufficient operating space, making it convenient for doctors to use professional inspection tools, such as oral probes, mouth mirrors, etc., to conduct meticulous observation and inspection of various parts of the mouth, including teeth, gums, mucosa, etc. At the same time, with the help of this device, doctors can also break through the limitations of conventional mouth opening and go deep into the mouth, such as conducting comprehensive and accurate inspections of the throat, palate and other areas, thereby providing strong support for the accurate diagnosis of oral diseases.

[0003] The patent with announcement number CN221331131U discloses an oral expansion device for oral examination, including an upper tooth guard groove, the front end of the upper tooth guard groove is fixedly connected to two fixed plates, a rotating shaft is passed through and rotatably connected between the two fixed plates, the outer wall of the rotating shaft passes through and rotatably connected to a first connecting plate, the front end of the first connecting plate is fixedly connected to a rotating column, the outer wall of the rotating column is fixedly connected to a second connecting plate, the bottom of the second connecting plate is fixedly connected to an illuminating lamp, and both sides of the bottom of the upper tooth guard groove are fixedly connected to a cylinder. In the field of oral medical examination, comprehensive and accurate examination of oral conditions is crucial for disease diagnosis. The oral expansion device for oral examination is a key auxiliary tool, and its function is to open the patient's mouth and provide doctors with a clear field of vision and operating space so as to conduct detailed inspections of the oral cavity and the deep part of the oral cavity. When inspecting the deep part of the oral cavity, the presence of the tongue will hinder the line of sight and operation, and doctors usually use a tongue depressor to press the tongue. However, the tongue depressor equipped with the existing oral expansion device for oral examination has obvious disadvantages in actual operation. Currently, most tongue depressors are directly pushed into the oral cavity. This simple operation design makes it very easy for the tongue depressor to come into close contact with the upper surface of the tongue and produce greater friction when it comes into contact with the tongue. When the patient is being examined, the oral cavity is in a relatively sensitive state. This friction will cause strong discomfort to the patient and may even cause damage to the mucosa on the surface of the tongue, increasing the patient's pain.

[0004] To solve the above problems, a mouth opening and supporting device for oral examination is proposed. Summary of the invention

[0005] The purpose of the present invention is to provide an oral expansion device for oral examination, which solves the problem that friction may cause strong discomfort to patients and may even cause damage to the mucosa on the surface of the tongue, increasing the pain of patients.

[0006] To achieve the above object, the present invention provides the following technical solution: an oral cavity expansion device for oral examination, comprising a first fixing plate, an upper tooth guard groove sleeve arranged above the first fixing plate, a second fixing plate arranged below the first fixing plate, a lower tooth guard groove sleeve arranged below the second fixing plate, a pushing mechanism is arranged between the first fixing plate and the second fixing plate, and a rotating mechanism is arranged on both sides of the pushing mechanism;

[0007] The pushing mechanism includes a first supporting plate fixedly connected to the upper surface of the second fixed plate, a first hole arranged inside the first supporting plate, a tongue depressor arranged on the inner side of the first hole, a first groove arranged inside the tongue depressor, a rotating rod arranged inside the first groove, the rotating rod and the tongue depressor are connected in a rotating manner, a second groove is arranged inside the rotating rod, a third hole is connected above the first groove, a first push rod fixedly connected to the first supporting plate is arranged on the inner side of the third hole, a plurality of third grooves are connected on one side of the second groove, a fourth groove is connected on one side of the third groove, a fifth groove connected to the lower surface of the inner side of the first hole is arranged on the inner side of the second fixed plate, a spring is fixedly connected to the inner side of the fifth groove, the upper end of the spring is fixedly connected to the top plate, one end of the rotating rod is fixedly connected to a torsion spring fixedly connected to the tongue depressor, and the second groove is connected to an end of the fourth groove away from the torsion spring through an eighth groove.

[0008] Preferably, the appearance structure of the rotating rod is cylindrical, and the outer side surface of the rotating rod is in contact with the inner side surface of the first groove.

[0009] Preferably, the central axis of the second groove is parallel to the central axis of the rotating rod, and the central axis of the second groove is parallel to the central axis of the third hole.

[0010] Preferably, the appearance structure of the first push rod is a cuboid, and the first push rod is matched with the second groove, the third groove and the fourth groove in a clearance fit, and the depth of the second groove is consistent with that of the fourth groove.

[0011] Preferably, a plurality of first push rods are provided, and the distance between two adjacent first push rods is consistent with the distance between two adjacent third grooves.

[0012] Preferably, the inner bottom surface of the third groove is an inclined surface.

[0013] Preferably, the appearance structure of the eighth groove is an arc shape, and the center of the eighth groove and the center of the rotating rod are on the same straight line.

[0014] Preferably, the rotating mechanism includes a second push rod fixedly connected to the lower surface of the first fixed plate, two second push rods are symmetrically arranged about the central axis of the rotating rod, second holes are arranged inside the two sides of the first support plate of the tongue depressor, a sixth groove is arranged on the outer side of the second hole, a rotating shaft is arranged on the inner side of the second hole, a rotating disk fixedly connected to the rotating shaft is arranged on the inner side of the sixth groove, a seventh groove is arranged on the inner side of the rotating shaft, the inner side of the seventh groove is fitted with the outer side surface of the second push rod, and the appearance structure of the second push rod is cylindrical, a guide groove is arranged on the inner wall of the seventh groove, a guide rod fixedly connected to the rotating rod is arranged on the inner side of the guide groove, a gear is fixedly connected to the lower end of the rotating shaft, and a rack fixedly connected to the tongue depressor is arranged on the outer side of the gear.

[0015] Preferably, the distance from the lower surface of the gear to the lower inner surface of the first hole is greater than the thickness of the tongue depressor, and the outer side surface of the gear is closer to the central axis of the rotating shaft than the side surface of the tongue depressor close to the rotating shaft.

[0016] Preferably, the appearance structure of the guide groove is spiral, and the matching mode between the guide groove and the guide rod is clearance matching.

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

[0018] 1. The oral cavity expansion device for oral examination provided by the present invention is provided with a pushing mechanism, so that the tongue depressor can first move laterally and rearwardly when pressing, and can press the tongue after being fixed. Compared with the prior art, the friction of the tongue depressor on the tongue is reduced, thereby reducing the damage to the tongue.

[0019] 2. The oral expansion device for oral examination provided by the present invention uses a rotating mechanism to drive the rotating mechanism to rotate when the pushing mechanism moves horizontally, driving the first fixed plate and the upper tooth guard groove sleeve to move upward at the same time. Compared with the prior art, the teeth are subjected to more uniform force, thereby reducing the harm to the patient. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall three-dimensional structure of the present invention;

[0021] Figure 2 It is a schematic diagram of the left-side cross-sectional structure of the second push rod of the present invention;

[0022] Figure 3 It is a schematic diagram of the cross-sectional structure of the tongue depressor of the present invention from the right side;

[0023] Figure 4It is a schematic diagram of the rear cross-sectional structure of the tongue depressor of the present invention;

[0024] Figure 5 It is a schematic diagram of the appearance structure of the rotating rod of the present invention;

[0025] Figure 6 For the present invention Figure 2 Schematic diagram of the structure at A in the middle;

[0026] Figure 7 For the present invention Figure 3 Schematic diagram of the structure at B in the middle;

[0027] Figure 8 For the present invention Figure 4 Schematic diagram of the structure at C in the middle;

[0028] Fig. 9 For the present invention Figure 4 Schematic diagram of the structure at point D in the middle.

[0029] In the figure: 1. first fixed plate; 2. upper tooth guard groove sleeve; 3. second fixed plate; 4. lower tooth guard groove sleeve; 5. pushing mechanism; 6. rotating mechanism; 501. first support plate; 502. first hole; 503. tongue depressor; 504. first groove; 506. rotating rod; 505. second groove; 515. third hole; 507. first push rod; 508. third groove; 509. fourth groove; 510. fifth groove; 511. spring; 512. push plate; 513. torsion spring; 514. eighth groove; 601. second push rod; 602. second hole; 603. sixth groove; 604. rotating shaft; 605. rotating disk; 606. seventh groove; 607. guide groove; 608. guide rod; 609. gear; 610. rack. DETAILED DESCRIPTION

[0030] 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.

[0031] See also Figure 1-Figure 9 The present invention provides a technical solution: an oral cavity expansion device for oral examination, comprising a first fixing plate 1, an upper tooth guard groove sleeve 2 arranged above the first fixing plate 1, a second fixing plate 3 arranged below the first fixing plate 1, a lower tooth guard groove sleeve 4 arranged below the second fixing plate 3, a pushing mechanism 5 is arranged between the first fixing plate 1 and the second fixing plate 3, and a rotating mechanism 6 is arranged on both sides of the pushing mechanism 5;

[0032] The pushing mechanism 5 includes a first supporting plate 501 fixedly connected to the upper surface of the second fixing plate 3, a first hole 502 arranged inside the first supporting plate 501, a tongue depressor 503 arranged inside the first hole 502, a first groove 504 arranged inside the tongue depressor 503, a rotating rod 506 arranged inside the first groove 504, the appearance structure of the rotating rod 506 is cylindrical, and the outer side surface of the rotating rod 506 is in contact with the inner side surface of the first groove 504, the rotating rod 506 is connected to the tongue depressor 503 in a rotating manner, so that the rotating rod 506 moves inside the first groove 504 so that no shaking occurs, the rotating rod 506 is arranged inside the second groove 505, the first groove 5 04 is connected with a third hole 515 above, the central axis of the second groove 505 is parallel to the central axis of the rotating rod 506, and the central axis of the second groove 505 is parallel to the central axis of the third hole 515, so that the first push rod 507 can move inside the second groove 505 and the third hole 515, and the first push rod 507 fixedly connected to the first support plate 501 is arranged inside the third hole 515, the appearance structure of the first push rod 507 is a rectangular parallelepiped, and the first push rod 507 cooperates with the second groove 505 and the third groove 508 and the fourth groove 509 in a clearance fit, and the depth of the second groove 505 is consistent with that of the fourth groove 509, and the first push rod 507 is provided with a plurality of, The spacing between two adjacent first push rods 507 is consistent with the spacing between two adjacent third grooves 508, so that the first push rod 507 can move inside the second groove 505, the third groove 508 and the fourth groove 509. One side of the second groove 505 is connected with multiple third grooves 508, and one side of the third groove 508 is connected with the fourth groove 509. The inner side of the second fixing plate 3 is provided with a fifth groove 510 connected with the inner lower surface of the first hole 502, and the inner side of the fifth groove 510 is fixedly connected with a spring 511, and the upper end of the spring 511 is fixedly connected with a push plate 512. One end of the rotating rod 506 is fixedly connected with a torsion spring 513 fixedly connected with the tongue depressor 503. The second groove 505 and the fourth groove 50 The end away from the torsion spring 513 is connected through the eighth groove 514. The appearance structure of the third groove 508 is an arc shape, and the center of the third groove 508 is higher than the center of the rotating rod 506, and the center of the third groove 508 is closer to the opening direction of the fourth groove 509 than the center of the rotating rod 506, so that the first push rod 507 can be pushed open by the first push rod 507 when moving on the inner side of the third groove 508, driving the tongue depressor 503 to move downward. The appearance structure of the eighth groove 514 is an arc shape, and the center of the eighth groove 514 is on the same line as the center of the rotating rod 506, so that the first push rod 507 will not move the tongue depressor 503 when moving on the inner side of the eighth groove 514.

[0033] The rotating mechanism 6 includes a second push rod 601 fixedly connected to the lower surface of the first fixed plate 1, and two second push rods 601 are symmetrically arranged about the central axis of the rotating rod 506. Second holes 602 are arranged inside the two sides of the first support plate 501 of the tongue depressor 503, and a sixth groove 603 is arranged on the outer side of the second hole 602. A rotating shaft 604 is arranged on the inner side of the second hole 602, and a rotating disk 605 fixedly connected to the rotating shaft 604 is arranged on the inner side of the sixth groove 603. A seventh groove 606 is arranged on the inner side of the rotating shaft 604, and the inner side of the seventh groove 606 is fitted with the outer side of the second push rod 601, and the appearance structure of the second push rod 601 is cylindrical, and a guide groove 607 is arranged on the inner wall of the seventh groove 606, and a guide groove 607 is arranged on the inner side of the guide groove 607. 506, a guide rod 608 fixedly connected to the lower end of the rotating shaft 604 is fixedly connected to a gear 609, and a rack 610 fixedly connected to the tongue depressor 503 is arranged on the outer side of the gear 609, the distance from the lower surface of the gear 609 to the inner lower surface of the first hole 502 is greater than the thickness of the tongue depressor 503, and the outer side surface of the gear 609 is closer to the central axis of the rotating shaft 604 than the side surface of the tongue depressor 503 close to the rotating shaft 604, so that the tongue depressor 503 can move up and down between the gear 609 and the lower surface of the first support plate 501, the appearance structure of the guide groove 607 is spiral, and the matching mode of the guide groove 607 and the guide rod 608 is clearance matching, so that when the guide rod 608 moves on the inner side of the guide groove 607, it can drive the rotating shaft 604 to rotate.

[0034] When the patient's mouth needs to be opened, the upper tooth guard groove sleeve 2 and the lower tooth guard groove sleeve 4 are aligned with the upper and lower teeth, the rotating rod 506 is rotated and the tongue depressor 503 is pushed to move backward, so that the first push rod 507 moves from the inner side of the eighth groove 514 to the inner side of the second groove 505, and then the rotating rod 506 on the inner side of the tongue depressor 503 moves backward. At this time, the rack 610 fixedly connected to the top of the tongue depressor 503 follows and moves backward. Because the outer side surface of the rack 610 is engaged with the outer side surface of the gear 609, the rack 610 drives the gear 609 to rotate, and drives the guide groove 607 to rotate. Because the guide rod 601 is nested in the inner side of the guide groove 607, the appearance structure of the guide groove 607 The guide groove 607 and the guide rod 608 are in a spiral shape, and the cooperation mode of the guide groove 607 and the guide rod 608 is a clearance cooperation, so that the edge of the guide groove 607 pushes the guide rod 608 and the second push rod 601 to move upward along the axial direction of the seventh groove 606, driving the first fixing plate 1 and the upper tooth guard groove sleeve 2 to move upward to open the patient's mouth. When the patient's mouth is opened to an appropriate degree, the tongue depressor 503 is stopped from moving backward, and the rotating rod 506 is released at this time. At this time, the torsion spring 513 has been rotated and is in a state of storing force. Since the appearance structure of the first push rod 507 is a rectangular parallelepiped, and the cooperation mode of the first push rod 507 and the second groove 505, the third groove 508 and the fourth groove 509 is a clearance cooperation, the first push rod 5 07 is provided with multiple first push rods 507, and the spacing between two adjacent first push rods 507 is consistent with the spacing between two adjacent third grooves 508, so that when the rotating rod 506 is released, the torsion spring 513 is reset, and the first push rod 507 moves to the inner side of the third groove 506. Because the inner bottom surface of the third groove 508 is an inclined surface, when the first push rod 507 moves to the inner side of the third groove 508, it will show a trend of moving upward along the bottom surface of the third groove 508. Because the first push rod 507 does not move, and the force is mutual, the first push rod 507 pushes the rotating rod 506 and the tongue depressor 503 to press down, and press the tongue. After the detection is completed, the rotating rod 506 continues to move to the fourth groove 509. The first push rod 507 is aligned with the position, and when the tongue depressor 503 presses the tongue, it pushes the spring 511 and the top plate 512 to accumulate force. At this time, the spring 511 and the top plate 512 push the tongue depressor 503 to move upward, so that the first push rod 507 moves to the inner side of the fourth groove 509. At this time, the tongue depressor 503 is not forced to limit, and can move in the opposite direction to make the first fixed plate 1 and the upper tooth guard groove sleeve 2 move downward to complete the disassembly. Because in this process, the tongue depressor 503 is first at a high position and moves to the rear side, and then presses down when the first fixed plate 1 moves to the appropriate position, during disassembly, the tongue depressor 503 first moves upward and then moves to the front side, and will not move relative to the upper surface of the tongue, thereby reducing damage to the tongue.

[0035] During the oral examination, if the tongue depressor 503 is not fixed, the movement of the patient's tongue will cause its position to change. When the tongue moves due to discomfort, the tongue depressor may shift or slide, making it impossible for the doctor to observe the internal structure of the oral cavity stably and clearly, affecting the examination of the throat, tonsils, deep oral cavity and other parts, reducing the efficiency and accuracy of the examination. When the rotating rod 506 is released, the torsion spring 513 is reset, and when the first push rod 507 moves to the inner side of the third groove 506, the position of the rotating rod 506 and the tongue depressor 503 is fixed, thereby improving the accuracy of the detection.

[0036] The oral structure is symmetrical on the left and right. Pushing the second push rods 601 on both sides at the same time can make both sides of the oral cavity be subjected to balanced pressure. If only one side is pushed, it will cause excessive force on one side and insufficient force on the other side, resulting in uneven force on the internal tissues of the oral cavity. For example, excessive squeezing on one side will cause the teeth, gums and mucosa on that side to bear additional pressure, causing pain and redness and swelling. This may also affect the health of the teeth in the long run. In order to improve the stability of the support, two sets of rotating mechanisms 6 are set to push the first fixed plate 1. When pushing, the gears 609 at both ends rotate at the same time, so that the pressure on both sides is as consistent as possible to reduce damage to the patient.

[0037] Similarly, the simultaneous descent of the second push rods 601 on both sides can effectively prevent oral tissue damage caused by unilateral force or unbalanced force. If the second push rods 601 on both sides descend asynchronously or with inconsistent amplitudes, the local area of ​​the oral cavity will be subjected to excessive pressure, thereby increasing the risk of loose teeth, gingival tears, oral mucosal damage and other injuries. Synchronous descent can evenly disperse the force to various parts of the oral cavity, reduce the degree of damage to oral tissue, and maximize the safety and comfort of patients when using the oral expansion device, reducing the pain and discomfort of patients.

[0038] When the tongue depressor 503 is used for detection, the throat area deep in the mouth is mostly detected. When this area is clamped, the patient is very likely to feel uncomfortable, because the throat area is a relatively sensitive area of ​​the human body and it is easy to trigger the vomiting reflex. If the expansion device is still in a limited state at this time, the mouth is forced to open, which will make it more difficult for the patient to control his throat muscles and oral state. The vomiting reflex may become stronger, causing the patient to vomit violently, which will not only affect the detection operation, but also may cause the patient's vomited stomach contents to block the airway, causing suffocation and other serious consequences. The doctor will generally cancel the support limit of the first fixing plate 1 immediately, because when the expansion device is used, the mouth and throat are in a stretched state, and the relevant muscles and nerves are inhibited or interfered with to a certain extent. After the limit is cancelled, the physiological structures such as the muscles and nerves of the mouth and throat return to a relatively natural state, and the originally suppressed swallowing reflex is also restored. Recovery, after the throat is stimulated, the human nervous system will automatically trigger the swallowing reflex, which is an instinctive physiological reaction, which aims to send foreign objects or secretions in the mouth and throat into the esophagus through swallowing to keep the respiratory and digestive tracts unobstructed. However, because the situation is sometimes urgent, the doctor will not take out the tongue depressor 503 in the first time. When the support limit of the first fixed plate 1 is cancelled, the patient swallows immediately. The strong contraction of the muscles during swallowing may cause excessive friction or compression between the tongue depressor 503 and the oral mucosa, gums, tongue root and other tissues, which can easily scratch the oral mucosa, cause bleeding and pain, increase the risk of infection, and affect the patient's oral health. When the first fixed plate 1 of the device is cancelled, the first fixed plate 1 and the tongue depressor 503 move simultaneously, and this can avoid the situation where the pressure plate 503 is still inside the oral cavity when the first fixed plate 1 is cancelled, thereby reducing the patient's pain and discomfort.

[0039] The first push rod 507 moves to the inner side of the fourth groove 509 for disassembly. At this time, the doctor can pull the tongue depressor 3 forward to move it, driving the first fixing plate 1 to move downward to cancel the limit. The advantage of this is that when the patient is uncomfortable, the movements are often hasty and uncontrolled, which may cause the oral cavity to collide with the support frame and damage the oral tissue, such as knocking the teeth and injuring the gums. In addition, it is difficult for the patient to accurately grasp the retraction force and speed, and cannot make appropriate adjustments according to the actual situation like the doctor. When the doctor operates, he can rely on his professional experience and familiarity with the device to gently and accurately retract the support frame to minimize the patient's discomfort. He can also observe the patient's condition at any time to ensure the patient's safety. However, sometimes because the oral cavity is expanded by the expansion device for a long time, the muscles are in a tense and stretched state, and the joints are also in an abnormal position. If the expansion force is suddenly released, the muscles will rebound quickly and the joints will return to their original position, which may cause muscle soreness and joint discomfort. The first fixing plate 1 is pushed downward by the patient, and the guide groove 607 is spiral in appearance and the guide groove 607 and the guide rod 608 are matched in a clearance manner, so the second push rod 601 can be directly pushed downward. When the limit of the first fixing plate 1 is cancelled, the first push rod 507 moves to the inner side of the fourth groove 509, and the torsion spring 513 is in a state of storing force, so that the fourth groove 509 is more closely fitted to the side of the first push rod 507 under the push of the torsion spring 513, thereby generating a certain friction force, thereby increasing a certain supporting force for the second push rod 601 and reducing the discomfort of the patient. In summary, the device provides more choices and a wider range of uses.

[0040] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0041] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An oral cavity expansion device for oral examination, comprising a first fixing plate (1), an upper tooth guard groove sleeve (2) arranged above the first fixing plate (1), a second fixing plate (3) arranged below the first fixing plate (1), and a lower tooth guard groove sleeve (4) arranged below the second fixing plate (3), characterized in that: A pushing mechanism (5) is provided between the first fixing plate (1) and the second fixing plate (3), and rotating mechanisms (6) are provided on both sides of the pushing mechanism (5); The pushing mechanism (5) comprises a first supporting plate (501) fixedly connected to the upper surface of the second fixing plate (3), a first hole (502) arranged inside the first supporting plate (501), a tongue depressor (503) arranged inside the first hole (502), a first groove (504) arranged inside the tongue depressor (503), a rotating rod (506) arranged inside the first groove (504), the rotating rod (506) and the tongue depressor (503) are connected in a rotating manner, a second groove (505) is arranged inside the rotating rod (506), a third hole (515) is connected above the first groove (504), and a tongue depressor (503) is arranged inside the third hole (515) so as to be connected to the first supporting plate (50 1) a first push rod (507) fixedly connected, one side of the second groove (505) is connected to a plurality of third grooves (508), one side of the third groove (508) is connected to a fourth groove (509), a fifth groove (510) connected to the inner lower surface of the first hole (502) is arranged on the inner side of the second fixing plate (3), a spring (511) is fixedly connected to the inner side of the fifth groove (510), the upper end of the spring (511) is fixedly connected to the push plate (512), one end of the rotating rod (506) is fixedly connected to a torsion spring (513) fixedly connected to the tongue depressor (503), and the second groove (505) is connected to the end of the fourth groove (509) away from the torsion spring (513) through an eighth groove (514).

2. The oral cavity expansion device for oral cavity inspection according to claim 1, characterized in that: The appearance structure of the rotating rod (506) is cylindrical, and the outer side surface of the rotating rod (506) is in contact with the inner side surface of the first groove (504).

3. The oral cavity expansion device for oral cavity inspection according to claim 1, characterized in that: The central axis of the second groove (505) is parallel to the central axis of the rotating rod (506), and the central axis of the second groove (505) is parallel to the central axis of the third hole (515).

4. The oral cavity expansion device for oral cavity inspection according to claim 1, characterized in that: The appearance structure of the first push rod (507) is a rectangular parallelepiped, and the first push rod (507) is matched with the second groove (505), the third groove (508) and the fourth groove (509) in a clearance fit, and the depth of the second groove (505) and the fourth groove (509) are consistent.

5. The oral cavity expansion device for oral cavity inspection according to claim 1, characterized in that: A plurality of the first push rods (507) are provided, and the distance between two adjacent first push rods (507) is consistent with the distance between two adjacent third grooves (508).

6. The oral cavity expansion device for oral cavity inspection according to claim 1, characterized in that: The inner bottom surface of the third groove (508) is an inclined surface.

7. The oral cavity expansion device for oral cavity inspection according to claim 1, characterized in that: The appearance structure of the eighth groove (514) is arc-shaped, and the center of the eighth groove (514) and the center of the rotating rod (506) are on the same straight line.

8. The oral cavity expansion device for oral cavity inspection according to claim 1, characterized in that: The rotating mechanism (6) comprises a second top rod (601) fixedly connected to the lower surface of the first fixed plate (1), two second top rods (601) are symmetrically arranged about the central axis of the rotating rod (506), second holes (602) are arranged inside the two sides of the first support plate (501), a sixth groove (603) is arranged outside the second hole (602), a rotating shaft (604) is arranged inside the second hole (602), a rotating disk (605) fixedly connected to the rotating shaft (604) is arranged inside the sixth groove (603), and the rotating shaft A seventh groove (606) is provided on the inner side of the second push rod (604), the inner side surface of the seventh groove (606) is in contact with the outer side surface of the second push rod (601), and the appearance structure of the second push rod (601) is cylindrical. A guide groove (607) is provided on the inner wall of the seventh groove (606), and a guide rod (608) fixedly connected to the rotating rod (506) is provided on the inner side of the guide groove (607). A gear (609) is fixedly connected to the lower end of the rotating shaft (604), and a rack (610) fixedly connected to the tongue depressor (503) is provided on the outer side of the gear (609).

9. The oral cavity expansion device for oral cavity inspection according to claim 8, characterized in that: The distance from the lower surface of the gear (609) to the lower surface of the inner side of the first hole (502) is greater than the thickness of the tongue depressor (503), and the outer side surface of the gear (609) is closer to the central axis of the rotating shaft (604) than the side surface of the tongue depressor (503) close to the rotating shaft (604).

10. The oral cavity expansion device for oral cavity inspection according to claim 8, characterized in that: The appearance structure of the guide groove (607) is spiral, and the matching mode between the guide groove (607) and the guide rod (608) is clearance matching.

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