Oral cavity opening device clinically applicable to department of stomatology

Abstract

The invention relates to the technical field of medical instruments, in particular to an oral cavity opening device clinically applicable to the stomatology department, and aims to solve the technical problems that an existing oral cavity opening device is simple in structure and single in function, the opening size cannot be freely adjusted, and meanwhile during examination, the opening size cannot be freely adjusted. In the prior art, medical staff need to observe pathological changes in the oral cavity of a patient with naked eyes, efficiency is low, and the risk of cross infection is brought to the medical staff. According to the technical scheme, the device comprises a fixing support, two positioning blocks are fixedly installed in an inner cavity of the fixing support, and a limiting rod is rotationally connected between the opposite sides of the two positioning blocks through a bearing. The oral cavity expanding device has the advantages that by arranging the expanding unit, the opening and closing degree of the oral cavity of a patient can be adjusted, by arranging the positioning unit, the expanding unit can be positioned, the use stability of the expanding unit is improved, by arranging the camera shooting mechanism, the oral cavity of the patient can be shot, and cross infection caused by visual inspection of medical staff is avoided.

Description

Technical Field

[0001] The invention relates to the technical field of medical devices, in particular to an oral opening device suitable for clinical stomatology. Background Art

[0002] The oral cavity is the starting part of the digestive tract. It is connected to the outside world through the fissure in the front and is connected to the pharynx through the pharyngeal isthmus in the back. There are teeth, tongue and other organs in the oral cavity. The front wall of the oral cavity is the lips, the side walls are the cheeks, the top is the palate, and the floor of the oral cavity is the mucosa and muscle structures. The oral cavity is divided into the oral vestibule in the anterior and lateral part and the proper oral cavity in the posterior and medial part by the upper and lower dental arches. When the upper and lower teeth are occluded, the oral vestibule and the proper oral cavity can be connected through the gap behind the third molar. Clinically, when the patient's teeth are clenched, an opener or intubation can be placed through this channel to inject drugs or nutrients and prevent tongue bites. When observing or treating the inside of the oral cavity, it is usually necessary to use an oral opening device to keep the mouth open.

[0003] When examining patients in the dental department, it is necessary to locate the patient's oral cavity through an oral opening device to facilitate medical staff to examine the inside of their oral cavity. However, the existing oral opening device has a simple structure and a single function, and the size of the opening cannot be freely adjusted. At the same time, during the examination, medical staff are required to observe the lesions inside the patient's oral cavity with the naked eye, which is not only inefficient but also brings the risk of cross infection to medical staff. For this reason, we propose an oral opening device suitable for clinical use in the dental department. Summary of the invention

[0004] The purpose of the present invention is to provide a mouth opening device suitable for clinical use in dentistry to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above object, the present invention provides the following technical solution: an oral opening device applicable to clinical stomatology, comprising a fixed bracket, the inner cavity of the fixed bracket is fixedly installed with two positioning blocks, the two positioning blocks are rotatably connected to a limiting rod through a bearing between opposite sides, and the inner cavity of the fixed bracket is provided with an expansion positioning mechanism;

[0006] The expansion positioning mechanism comprises an expansion unit, which is arranged in the inner cavity of the fixed bracket and is used for expanding and positioning the oral cavity;

[0007] The expansion positioning mechanism further includes a positioning unit, which is disposed in the inner cavity of the fixed support and is used in conjunction with the expansion unit to position the expansion unit;

[0008] A camera mechanism is provided on the surface of the limiting rod, and the camera mechanism is used to monitor the oral cavity, and the camera mechanism is used in conjunction with the expansion positioning mechanism.

[0009] Preferably, the expansion unit includes a rotating rod, which is arranged in the inner cavity of the fixed bracket, the surface of the rotating rod is rotatably connected to the inner wall of the fixed bracket, both sides of the rotating rod are fixedly connected to the first bevel gear, the surface of the first bevel gear is meshingly connected to the second bevel gear, the top of the second bevel gear is fixedly connected to the positioning rod, the top of the positioning rod is fixedly connected to the third bevel gear, the surface of the third bevel gear is meshingly connected to the fourth bevel gear, the rear side of the fourth bevel gear is fixedly connected to the threaded rod, the rear side of the threaded rod is rotatably connected to the L-shaped bracket through a bearing, the side of the L-shaped bracket away from the threaded rod is fixedly connected to the fixed bracket, the surface of the threaded rod is threadedly connected to a threaded sleeve, the top and bottom of the threaded sleeve are fixedly connected to the positioning frame, the inner cavity of the positioning frame is rotatably connected to the support rod through a rotating shaft, the side of the support rod away from the positioning frame is rotatably connected to the limiting frame through a rotating shaft, the rear side of the limiting frame is fixedly connected to a positioning brace, and the surface fixed sleeve of the rotating rod is provided with two positioning plates.

[0010] Preferably, the surface of the positioning rod is rotatably connected to a limiting block via a bearing, and the front side of the limiting block is fixedly connected to the inner wall of the fixing bracket.

[0011] Preferably, a retaining rod is rotatably connected to the surface of the support rod via a rotating shaft, and a side of the retaining rod away from the support rod is rotatably connected to the L-shaped bracket via a rotating shaft.

[0012] Preferably, retaining blocks are provided on both sides of the limiting frame, and the rear sides of the retaining blocks are fixedly connected to the front sides of the positioning braces.

[0013] Preferably, the number of the positioning braces is two, and the positioning braces are made of plastic.

[0014] Preferably, the positioning unit includes two electric telescopic rods, which are fixedly installed at the bottom of the fixed bracket, and the telescopic ends of the electric telescopic rods pass through the fixed bracket and are fixedly connected to the limiting plate, both sides of the limiting plate are in contact with the inner wall of the fixed bracket, and the top of the limiting plate is fixedly installed with an insert rod, which is used in conjunction with the positioning plate.

[0015] Preferably, sliders are fixedly connected to both sides of the limiting plate, sliding grooves are provided on both sides of the inner cavity of the fixed bracket, and the side of the slider away from the limiting plate is slidably connected to the inner wall of the sliding groove.

[0016] Preferably, the camera mechanism includes two limit brackets, which are sleeved on the surface of the limit rod, and a positioning frame is fixedly installed between the opposite sides of the two limit brackets. A miniature camera is arranged in the inner cavity of the positioning frame, and a wire is electrically connected to the front side of the miniature camera. A lighting lamp is arranged on the rear side of the positioning frame, and the number of the lighting lamps is two.

[0017] Preferably, a handle is fixedly mounted on the bottom of the fixing bracket, and a groove is formed on the surface of the handle.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] 1. The present invention is provided with an expansion unit, under the action of which, the opening and closing degree of the patient's oral cavity can be adjusted to improve the inspection efficiency. At the same time, the setting of the retaining rod can improve the stability of the use of the two positioning braces, and avoid the position change of the positioning braces after being stressed, which affects the medical staff's inspection of the patient's oral cavity.

[0020] 2. The present invention provides a positioning unit, under the action of which, the rotating rod can be positioned, thereby improving the stability of the rotating rod and preventing the position of the positioning braces from changing during the use of the expansion unit, thereby affecting the inspection quality. At the same time, the electric telescopic rod can be used to release the positioning of the rotating rod, making it convenient for medical staff to close the expansion unit.

[0021] 3. The present invention is provided with a camera mechanism, which can take pictures of the patient's oral cavity under the action of the camera mechanism, so as to avoid cross infection caused by naked eye observation by medical staff. At the same time, the limiting bracket is used to rotate and slide left and right on the surface of the limiting rod, which can increase the shooting range of the micro camera, and the lighting lamp is used to increase the brightness of the patient's oral cavity, which can improve the imaging effect and quality of the micro camera. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0023] Figure 2 It is a rear view of the overall structure of the present invention;

[0024] Figure 3 It is a structural cross-sectional view of the fixing bracket of the present invention;

[0025] Figure 4 It is a structural schematic diagram of the expansion unit of the present invention;

[0026] Figure 5 It is a structural cross-sectional view of the fixing bracket, the positioning unit and the handle of the present invention;

[0027] Figure 6 It is a structural rear view of the fixing bracket and the camera mechanism of the present invention.

[0028] In the figure: 1, fixed bracket; 11, positioning block; 12, limit rod; 13, slide groove; 14, grip; 15, groove; 2, expansion positioning mechanism; 21, expansion unit; 2101, rotating rod; 2102, first bevel gear; 2103, second bevel gear; 2104, positioning rod; 2105, third bevel gear; 2106, fourth bevel gear; 2107, threaded rod; 2108, L-shaped bracket; 2109, threaded sleeve; 2110, positioning frame ; 2111, support rod; 2112, limit frame; 2113, positioning braces; 2114, positioning plate; 2115, limit block; 2116, retaining rod; 2117, retaining block; 22, positioning unit; 2201, electric telescopic rod; 2202, limit plate; 2203, plug rod; 2204, slider; 3, camera mechanism; 301, limit bracket; 302, positioning frame; 303, miniature camera; 304, wire; 305, lighting lamp. DETAILED DESCRIPTION

[0029] 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.

[0030] Embodiment 1

[0031] See also Figure 1-6 The present invention provides a technical solution: an oral opening device applicable to clinical stomatology, the present invention makes corresponding improvements to the technical problems mentioned in the background technology, including a fixed bracket 1, two positioning blocks 11 are fixedly installed in the inner cavity of the fixed bracket 1, and the two positioning blocks 11 are rotatably connected to the limiting rod 12 on the opposite sides through a bearing, and the inner cavity of the fixed bracket 1 is provided with an expansion positioning mechanism 2;

[0032] The expansion positioning mechanism 2 includes an expansion unit 21, which is disposed in the inner cavity of the fixed support 1 and is used for expanding and positioning the oral cavity;

[0033] The expansion positioning mechanism 2 further includes a positioning unit 22, which is disposed in the inner cavity of the fixed support 1, and is used in conjunction with the expansion unit 21, and is used to position the expansion unit 21;

[0034] A camera mechanism 3 is disposed on the surface of the limiting rod 12 . The camera mechanism 3 is used to monitor the oral cavity. The camera mechanism 3 is used in conjunction with the expansion positioning mechanism 2 .

[0035] The expansion unit 21 includes a rotating rod 2101, which is arranged in the inner cavity of the fixed bracket 1. The surface of the rotating rod 2101 is rotatably connected to the inner wall of the fixed bracket 1. The first bevel gear 2102 is fixedly connected to both sides of the rotating rod 2101. The surface of the first bevel gear 2102 is meshedly connected to the second bevel gear 2103. The top of the second bevel gear 2103 is fixedly connected to a positioning rod 2104. The top of the positioning rod 2104 is fixedly connected to a third bevel gear 2105. The surface of the third bevel gear 2105 is meshedly connected to a fourth bevel gear 2106. The rear side of the fourth bevel gear 2106 is fixedly connected to a threaded rod 2107. The threaded rod The rear side of 2107 is rotatably connected with an L-shaped bracket 2108 through a bearing, and the side of the L-shaped bracket 2108 away from the threaded rod 2107 is fixedly connected to the fixed bracket 1, and the surface of the threaded rod 2107 is threadedly connected with a threaded sleeve 2109, and the top and bottom of the threaded sleeve 2109 are fixedly connected with a positioning frame 2110, and the inner cavity of the positioning frame 2110 is rotatably connected with a support rod 2111 through a rotating shaft, and the side of the support rod 2111 away from the positioning frame 2110 is rotatably connected with a limiting frame 2112 through a rotating shaft, and the rear side of the limiting frame 2112 is fixedly connected with a positioning brace 2113, and the surface fixed sleeve of the rotating rod 2101 is provided with two positioning plates 2114;

[0036] The surface of the positioning rod 2104 is rotatably connected to the limiting block 2115 through a bearing, and the front side of the limiting block 2115 is fixedly connected to the inner wall of the fixing bracket 1;

[0037] The surface of the support rod 2111 is rotatably connected to a retaining rod 2116 via a rotating shaft, and the side of the retaining rod 2116 away from the support rod 2111 is rotatably connected to the L-shaped bracket 2108 via a rotating shaft;

[0038] Both sides of the limiting frame 2112 are provided with retaining blocks 2117, and the rear side of the retaining blocks 2117 is fixedly connected to the front side of the positioning brace 2113;

[0039] There are two positioning braces 2113, and the positioning braces 2113 are made of plastic.

[0040] By setting up the expansion unit 21, the opening and closing degree of the patient's oral cavity can be adjusted under the action of the expansion unit 21, thereby improving the inspection efficiency. At the same time, by using the setting of the retaining rod 2116, the stability of the use of the two positioning braces 2113 can be improved, thereby preventing the positioning braces 2113 from changing their position after being subjected to force, thereby affecting the medical staff's inspection of the patient's oral cavity.

[0041] The specific implementation of this embodiment is as follows: when the medical staff examines the patient's oral cavity, first let the patient hold the handle 14 and fit the teeth to the inner wall of the positioning brace 2113. After the fitting is completed, the medical staff rotates the rotating rod 2101. The rotating rod 2101 drives the two first bevel gears 2102 to rotate when rotating. The two first bevel gears 2102 drive the two second bevel gears 2103 to rotate when rotating. The two second bevel gears 2103 drive the two positioning rods 2104 to rotate when rotating. The two positioning rods 2104 drive the two third bevel gears 2105 to rotate when rotating. The two third bevel gears 2105 drive The two fourth bevel gears 2106 rotate, and the two fourth bevel gears 2106 drive the two threaded rods 2107 to rotate when rotating. The threads of the two threaded rods 2107 are opposite. The two threaded rods 2107 drive the two threaded sleeves 2109 to move backward when rotating. The two threaded sleeves 2109 drive the four positioning frames 2110 to move backward when moving backward. The four positioning frames 2110 drive one end of the four support rods 2111 to move backward when moving backward. At this time, the support rod 2111 is limited by the retaining rod 2116, so that the other end of the support rod 2111 drives the two positioning braces 2113 to move in the opposite direction, thereby opening the patient's mouth.

[0042] Embodiment 2

[0043] See also Figure 1-6 The present invention provides a technical solution: an oral opening device applicable to clinical stomatology. The present invention makes corresponding improvements to the technical problems mentioned in the background technology. The positioning unit 22 includes two electric telescopic rods 2201, which are fixedly installed at the bottom of the fixed bracket 1. The telescopic ends of the electric telescopic rods 2201 penetrate the fixed bracket 1 and are fixedly connected to the limiting plate 2202. Both sides of the limiting plate 2202 are in contact with the inner wall of the fixed bracket 1. The top of the limiting plate 2202 is fixedly installed with an insertion rod 2203, which is used in conjunction with the positioning plate 2114.

[0044] Slide blocks 2204 are fixedly connected to both sides of the limiting plate 2202 , and slide grooves 13 are provided on both sides of the inner cavity of the fixed bracket 1 . The side of the slide block 2204 away from the limiting plate 2202 is slidably connected to the inner wall of the slide groove 13 .

[0045] By setting up the positioning unit 22, the rotating rod 2101 can be positioned under the action of the positioning unit 22, thereby improving the stability of the rotating rod 2101 and preventing the position of the positioning braces 2113 from changing during the use of the expansion unit 21, thereby affecting the inspection quality. At the same time, the electric telescopic rod 2201 can be used to release the positioning of the rotating rod 2101, making it convenient for medical staff to close the expansion unit 21.

[0046] The specific implementation method of this embodiment is as follows: when the patient's mouth is stretched and adjusted to the specified position, the medical staff uses an external power supply to start the electric telescopic rod 2201, and the telescopic end of the electric telescopic rod 2201 drives the limit plate 2202 to move upward. When the limit plate 2202 moves upward, it drives the insertion rod 2203 to move upward. After the insertion rod 2203 moves upward and is inserted into the inner cavity of the positioning plate 2114, the rotating rod 2101 can be positioned, thereby improving the stability of the expansion unit 21 and avoiding the position change of the positioning braces 2113 after being subjected to force, which affects the medical staff's examination of the patient's mouth.

[0047] Embodiment 3

[0048] See also Figure 1-6 The present invention provides a technical solution: an oral opening device applicable to clinical stomatology. The present invention makes corresponding improvements to the technical problems mentioned in the background technology. The camera mechanism 3 includes two limit brackets 301, the limit brackets 301 are sleeved on the surface of the limit rod 12, and a positioning frame 302 is fixedly installed between the opposite sides of the two limit brackets 301. A micro camera 303 is arranged in the inner cavity of the positioning frame 302. The front side of the micro camera 303 is electrically connected to a wire 304. The rear side of the positioning frame 302 is provided with an illuminating lamp 305, and the number of the illuminating lamps 305 is two;

[0049] A handle 14 is fixedly mounted on the bottom of the fixing bracket 1 , and a groove 15 is formed on the surface of the handle 14 .

[0050] By setting up the camera mechanism 3, the patient's oral cavity can be photographed under the action of the camera mechanism 3, avoiding medical staff from observing with the naked eye and causing cross infection. At the same time, the limiting bracket 301 is used to rotate and slide left and right on the surface of the limiting rod 12, which can increase the shooting range of the micro camera 303, and the lighting lamp 305 is used to increase the brightness of the patient's oral cavity, which can improve the imaging effect of the micro camera 303.

[0051] The specific implementation of this embodiment is as follows: after the expansion positioning mechanism 2 positions the patient's oral cavity, the medical staff holds the bottom of the limit bracket 301 and rotates the limit bracket 301. When the limit bracket 301 rotates, it drives the positioning frame 302 to rotate. When the positioning frame 302 rotates, it drives the micro camera 303 and the lighting lamp 305 to rotate. By adjusting the angles of the micro camera 303 and the lighting lamp 305, the vertical shooting range of the micro camera 303 can be improved. At the same time, the lighting lamp 305 can be used to increase the brightness inside the oral cavity, thereby improving the imaging effect and quality of the micro camera 303. The limit bracket 301 is movably mounted on the surface of the limit rod 12. During inspection, the limit bracket 301 is slid left and right on the surface of the limit rod 12, which can increase the horizontal shooting range of the micro camera 303.

[0052] Working principle: When the medical staff examines the patient's oral cavity, first let the patient hold the handle 14 and fit the teeth to the inner wall of the positioning brace 2113. After the fitting is completed, the medical staff rotates the rotating rod 2101. When the rotating rod 2101 rotates, it drives the two first bevel gears 2102 to rotate. When the two first bevel gears 2102 rotate, they drive the two second bevel gears 2103 to rotate. When the two second bevel gears 2103 rotate, they drive the two positioning rods 2104 to rotate. When the two positioning rods 2104 rotate, they drive the two third bevel gears 2105 to rotate. When the two third bevel gears 2105 rotate, they drive the two fourth bevel gears 2104 to rotate. When the wheel 2106 rotates, the two fourth bevel gears 2106 drive the two threaded rods 2107 to rotate. The threads of the two threaded rods 2107 are opposite. When the two threaded rods 2107 rotate, they drive the two threaded sleeves 2109 to move backward. When the two threaded sleeves 2109 move backward, they drive the four positioning frames 2110 to move backward. When the four positioning frames 2110 move backward, they drive one end of the four support rods 2111 to move backward. At this time, the support rod 2111 is limited by the retaining rod 2116, so that the other end of the support rod 2111 drives the two positioning braces 2113 to move in the opposite direction, so that the patient's mouth can be opened. After the cavity is expanded and adjusted to the specified position, the medical staff uses an external power supply to start the electric telescopic rod 2201, and the telescopic end of the electric telescopic rod 2201 drives the limit plate 2202 to move upward. When the limit plate 2202 moves upward, it drives the insertion rod 2203 to move upward. After the insertion rod 2203 moves upward and inserts into the inner cavity of the positioning plate 2114, the rotating rod 2101 can be positioned, thereby improving the stability of the expansion unit 21 and avoiding the position change of the positioning brace 2113 after the force is applied, which affects the medical staff's inspection of the patient's oral cavity. After the expansion positioning mechanism 2 positions the patient's oral cavity, the medical staff holds the bottom of the limit bracket 301 and rotates the limit bracket 303. 01. When the limit bracket 301 rotates, it drives the positioning frame 302 to rotate. When the positioning frame 302 rotates, it drives the micro camera 303 and the lighting lamp 305 to rotate. By adjusting the angles of the micro camera 303 and the lighting lamp 305, the vertical shooting range of the micro camera 303 can be increased. At the same time, the lighting lamp 305 can increase the brightness inside the oral cavity, thereby improving the imaging effect and quality of the micro camera 303. The limit bracket 301 is movably mounted on the surface of the limit rod 12. During inspection, the limit bracket 301 is slid left and right on the surface of the limit rod 12, which can increase the horizontal shooting range of the micro camera 303.

[0053] 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.

[0054] 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 opening device suitable for clinical use in dentistry, comprising a fixed bracket (1), characterized in that: Two positioning blocks (11) are fixedly installed in the inner cavity of the fixed bracket (1), and a limiting rod (12) is rotatably connected between opposite sides of the two positioning blocks (11) via a bearing, and an expansion positioning mechanism (2) is provided in the inner cavity of the fixed bracket (1); The expansion positioning mechanism (2) comprises an expansion unit (21), the expansion unit (21) is arranged in the inner cavity of the fixed support (1), and the expansion unit (21) is used for expanding and positioning the oral cavity; The expansion positioning mechanism (2) further comprises a positioning unit (22), wherein the positioning unit (22) is arranged in the inner cavity of the fixed support (1), and the positioning unit (22) is used in conjunction with the expansion unit (21), and the positioning unit (22) is used to position the expansion unit (21); A camera mechanism (3) is provided on the surface of the limiting rod (12). The camera mechanism (3) is used to monitor the oral cavity. The camera mechanism (3) is used in conjunction with the expansion positioning mechanism (2).

2. The oral opening device for clinical use in dentistry according to claim 1, characterized in that: The expansion unit (21) comprises a rotating rod (2101), wherein the rotating rod (2101) is arranged in the inner cavity of the fixed bracket (1), the surface of the rotating rod (2101) is rotatably connected to the inner wall of the fixed bracket (1), the first bevel gear (2102) is fixedly connected to both sides of the rotating rod (2101), the surface of the first bevel gear (2102) is meshingly connected to the second bevel gear (2103), the top of the second bevel gear (2103) is fixedly connected to a positioning rod (2104), the top of the positioning rod (2104) is fixedly connected to a third bevel gear (2105), the surface of the third bevel gear (2105) is meshingly connected to a fourth bevel gear (2106), the rear side of the fourth bevel gear (2106) is fixedly connected to a threaded rod (2107), and the The rear side of the threaded rod (2107) is rotatably connected to an L-shaped bracket (2108) via a bearing; the side of the L-shaped bracket (2108) away from the threaded rod (2107) is fixedly connected to the fixed bracket (1); the surface of the threaded rod (2107) is threadedly connected to a threaded sleeve (2109); the top and bottom of the threaded sleeve (2109) are fixedly connected to a positioning frame (2110); the inner cavity of the positioning frame (2110) is rotatably connected to a support rod (2111) via a rotating shaft; the side of the support rod (2111) away from the positioning frame (2110) is rotatably connected to a limiting frame (2112) via a rotating shaft; the rear side of the limiting frame (2112) is fixedly connected to a positioning brace (2113); and the surface fixed sleeve of the rotating rod (2101) is provided with two positioning plates (2114).

3. The oral opening device for clinical use in dentistry according to claim 2, characterized in that: The surface of the positioning rod (2104) is rotatably connected to the limiting block (2115) via a bearing, and the front side of the limiting block (2115) is fixedly connected to the inner wall of the fixed bracket (1).

4. The oral opening device for clinical use in dentistry according to claim 2, characterized in that: The surface of the support rod (2111) is rotatably connected to a retaining rod (2116) via a rotating shaft, and the side of the retaining rod (2116) away from the support rod (2111) is rotatably connected to the L-shaped bracket (2108) via a rotating shaft.

5. The oral opening device for clinical use in dentistry according to claim 2, characterized in that: Retaining blocks (2117) are provided on both sides of the limiting frame (2112), and the rear side of the retaining block (2117) is fixedly connected to the front side of the positioning brace (2113).

6. The oral opening device for clinical use in dentistry according to claim 2, characterized in that: The number of the positioning braces (2113) is two, and the positioning braces (2113) are made of plastic.

7. The oral opening device for clinical use in dentistry according to claim 1, characterized in that: The positioning unit (22) comprises two electric telescopic rods (2201), the electric telescopic rods (2201) are fixedly mounted on the bottom of the fixed bracket (1), the telescopic ends of the electric telescopic rods (2201) pass through the fixed bracket (1) and are fixedly connected to a limit plate (2202), both sides of the limit plate (2202) are in contact with the inner wall of the fixed bracket (1), and an insertion rod (2203) is fixedly mounted on the top of the limit plate (2202), and the insertion rod (2203) is used in conjunction with the positioning plate (2114).

8. The oral opening device for clinical use in dentistry according to claim 7, characterized in that: Slide blocks (2204) are fixedly connected to both sides of the limiting plate (2202), and slide grooves (13) are provided on both sides of the inner cavity of the fixed bracket (1), and the side of the slide block (2204) away from the limiting plate (2202) is slidably connected to the inner wall of the slide groove (13).

9. The oral opening device applicable to stomatology clinics according to claim 1, characterized in that: The camera mechanism (3) comprises two limit brackets (301), the limit brackets (301) are sleeved on the surface of the limit rod (12), a positioning frame (302) is fixedly installed between the two opposite sides of the limit brackets (301), a miniature camera (303) is arranged in the inner cavity of the positioning frame (302), the front side of the miniature camera (303) is electrically connected to a wire (304), and an illumination lamp (305) is arranged on the rear side of the positioning frame (302), and the number of the illumination lamps (305) is two.

10. The oral opening device applicable to stomatology clinics according to claim 1, characterized in that: A handle (14) is fixedly mounted on the bottom of the fixed bracket (1), and a groove (15) is formed on the surface of the handle (14).

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