Oral cavity opening device

Abstract

The invention provides an oral cavity opener, and belongs to the technical field of oral cavity examination. The oral cavity opener comprises a first supporting plate, a second supporting plate and an expanding mechanism, a connecting part is installed on the back face of the first supporting plate, placing mechanisms are arranged on the rear sides of the two sides of the top of the first supporting plate, a supporting mechanism is installed on the top of the second supporting plate, and a first mounting shaft is rotationally installed on the outer side of a mounting base; the supporting rod is fixedly mounted at the top of the first mounting shaft, a second mounting shaft is mounted at the top of the supporting rod, and the clamping seat is mounted at the bottom of the second supporting plate. After the first supporting plate and the second supporting plate are placed in the oral cavity of the groove, the first supporting plate, the connecting part and the second supporting plate are matched to achieve a preliminary opening effect, and the placing mechanisms mounted on the two sides of the first supporting plate can be attached to teeth, so that the first supporting plate is supported; the situation that the first supporting plate directly extrudes the tongue of the patient, and consequently the patient feels uncomfortable is avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of oral examination, and in particular to an oral cavity opener.

[0002] Generally, when medical staff treat patients' mouths, teeth or throats, patients have to open their mouths widely. After a long time, patients drool, mainly because the masseter muscles are tense and the saliva secretion speed is accelerated. They may have to gargle many times and feel tired. It is very easy for them to bite the medical staff's hands when they suddenly close their mouths due to pain or tension. Especially when local anesthesia is performed in the mouth, the patient loses control and often bites the medical staff's hands due to sudden muscular tension, which is dangerous. Or the doctor's operating field is poor due to insufficient support of the oral muscles, so it is necessary to use a mouth opener to open the patient's mouth.

[0003] However, the openers in the prior art mostly directly support the patient's teeth when opening the patient's mouth. Although they have good stability, it makes it difficult for medical staff to detect the patient's blocked teeth. In addition, since the mouth does not have a large space, the patient's upper and lower jaws will be excessively expanded when the opener is moved, causing the patient to experience discomfort for a long time during and after the examination. Summary of the invention

[0004] In order to make up for the above deficiencies, the present invention provides a mouth opener that overcomes the above technical problems or at least partially solves the above problems.

[0005] The present invention is achieved in that:

[0006] The present invention provides an oral opening device, comprising a first support plate and a second support plate, wherein a connecting portion is installed on the back of the first support plate, and the top of the front of the connecting portion is connected to the back of the second support plate, a placing mechanism is provided on the rear sides of both sides of the top of the first support plate, and a supporting mechanism is installed on the top of the second support plate;

[0007] An expansion mechanism, the expansion mechanism comprising:

[0008] A mounting seat, the mounting seat being mounted on the top of the first supporting plate;

[0009] A first mounting shaft, the first mounting shaft being rotatably mounted on the outer side of the mounting seat;

[0010] A support rod, wherein the top of the first mounting shaft is fixedly mounted on the support rod, and the second mounting shaft is mounted on the top of the support rod;

[0011] A clamping seat is installed at the bottom of the second supporting plate. A plurality of clamping seats are provided, and the second mounting shaft is clamped and matched with the clamping seat.

[0012] In a preferred solution, the placement mechanism includes a sliding groove, and the sliding groove is opened on both sides of the top of the first support plate, a sliding block is slidably installed in the inner cavity of the sliding groove, a mounting block is installed on the top of the sliding block, a connecting block is inserted on the outer side of the mounting block, a support block is fixedly installed on the outer side of the connecting block, and an extrusion pad is installed on the bottom of the support block.

[0013] In a preferred embodiment, a limiting groove is provided on the surface of the connecting block, and there are several limiting grooves, a through groove is provided on the top of the mounting block, a limiting plate is installed on the side of the connecting block away from the supporting block, a magnetic plate is installed at the bottom of the inner cavity of the mounting block, a plug-in frame is plugged into the inner cavity of the through groove, and the plug-in frame penetrates the limiting groove and is adsorbed on the magnetic plate.

[0014] In a preferred embodiment, the support mechanism includes a connecting pad, which is installed on the top of the second support plate and is arranged in a V shape. A soft pad is installed on the top of the connecting pad, and a spring is installed on the bottom of the inner wall of the connecting pad. The spring is arranged in several groups, and the top of the spring is connected to the top of the inner wall of the soft pad. Connecting strips are installed on both sides of the inner wall of the connecting pad.

[0015] In a preferred solution, a cushion block is installed at the bottom of the first support plate. The cushion block is made of elastic material, and the surface of the cushion block is arranged in an arc shape.

[0016] In a preferred solution, a fixing seat is installed on the top of the first support plate, and a plurality of fixing seats are provided. A mounting tube is installed on the top of the fixing seat, and a suction rod is inserted into the front side of the mounting tube.

[0017] In a preferred embodiment, the front and rear sides of the bottom of the mounting tube are respectively connected to the first connecting tube and the second connecting tube, the bottoms of the first connecting tube and the second connecting tube are respectively connected to the first suction tube and the second suction tube, and both the first suction tube and the second suction tube are rubber hoses.

[0018] In a preferred embodiment, a first piston disk is installed on the front side of the inner cavity of the mounting tube, a mounting cylinder is installed on the front side of the first piston disk, a second piston disk is installed on the rear side of the inner cavity of the mounting tube, and the back side of the suction rod passes through the mounting cylinder and the first piston disk and extends to the front side of the second piston disk.

[0019] In a preferred solution, an extrusion cavity is opened at the top of the front side of the installation tube, a through cavity is opened at the left side of the front side of the installation tube, and an extrusion block is installed on the surface of the suction rod, and the extrusion block is plugged into the extrusion cavity.

[0020] In a preferred solution, gaskets are installed on the tops of the inner cavities of the first connecting tube and the second connecting tube. The gaskets are arranged in a fan shape, and there are a plurality of gaskets. The gaskets are made of elastic material.

[0021] The oral cavity opener provided by the present invention has the following beneficial effects:

[0022] 1. By setting a placement mechanism, after the first support plate and the second support plate are placed in the slot mouth, the first support plate, the connecting part and the second support plate can cooperate to play a role of preliminary opening, and the placement mechanisms installed on both sides of the first support plate can fit with the teeth, thereby supporting the first support plate, avoiding the first support plate directly squeezing the patient's tongue and causing discomfort to the patient.

[0023] 2. By setting up a supporting mechanism, the supporting mechanism can be fitted with the upper jaw, so that the first supporting plate, the connecting part and the second supporting plate cooperate to support the oral cavity, and the upper jaw supporting part of the supporting mechanism is made of soft or elastic material, which can fit with the upper jaw to avoid direct squeezing of the upper jaw or gums, causing damage to the upper jaw and gums.

[0024] 3. By setting up an expansion mechanism, after the first support plate and the second support plate are placed, the expansion mechanism can support the second support plate through the clamping position of the expansion mechanism, thereby increasing the degree of oral opening, thereby facilitating the inspection of the oral cavity and molars. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only illustrate certain embodiments of the present invention and should not be regarded as limiting the scope. For those skilled in the art, other relevant drawings can be obtained based on these drawings without creative work.

[0026] Figure 1 is a stereogram provided by an embodiment of the present invention;

[0027] Figure 2 A schematic diagram of a three-dimensional side view structure provided by an embodiment of the present invention;

[0028] Figure 3 A schematic diagram of a three-dimensional bottom-up structure provided by an embodiment of the present invention;

[0029] Figure 4 A schematic diagram of the three-dimensional matching structure of the support rods provided in an embodiment of the present invention;

[0030] Figure 5 A schematic diagram of a three-dimensional cross-sectional structure of a mounting block provided in an embodiment of the present invention;

[0031] Figure 6 A schematic diagram of a three-dimensional cross-sectional structure of a mounting tube provided in an embodiment of the present invention;

[0032] Figure 7 The embodiments of the present invention provide Figure 6 The enlarged structural diagram at A in the middle;

[0033] Figure 8 The embodiments of the present invention provide Figure 6 The enlarged structural diagram at B in the middle;

[0034] In the figure: 1. first support plate; 2. second support plate; 3. connecting part; 4. mounting seat; 5. first mounting axis; 6. support rod; 7. second mounting axis; 8. clamping seat; 9. sliding groove; 10. sliding block; 11. mounting block; 12. connecting block; 13. supporting block; 14. extrusion pad; 15. limiting groove; 16. through groove; 17. limiting plate; 18. magnetic plate; 19. plug-in frame; 20. connecting pad; 21. cushion; 22. spring; 23. connecting belt; 24. pad; 25. fixing seat; 26. mounting tube; 27. suction rod; 28. first connecting tube; 29. ​​second connecting tube; 30. first suction tube; 31. second suction tube; 32. first piston disc; 33. mounting cylinder; 34. second piston disc; 35. extrusion chamber; 36. sealing pad; 37. through chamber; 38. extrusion block. DETAILED DESCRIPTION

[0035] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are 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.

[0036] Reference Figure 1-Figure 8The present invention provides a technical solution: an oral opener, comprising a first support plate 1, a second support plate 2 and an expansion mechanism, a connecting portion 3 is installed on the back of the first support plate 1, and the top of the front of the connecting portion 3 is connected to the back of the second support plate 2, a placing mechanism is provided on the rear sides of both sides of the top of the first support plate 1, and a supporting mechanism is installed on the top of the second support plate 2, so that after the first support plate 1 and the second support plate 2 are placed in the patient's oral cavity, the first support plate 1 and the second support plate 2 can squeeze the patient's lower jaw and upper jaw, thereby opening the oral cavity, and at the same time, the upper jaw supporting part in the supporting mechanism is made of soft or elastic material, which can fit with the upper jaw to avoid direct squeezing The upper jaw or gums are pressed, causing damage to the upper jaw and gums, and the placement mechanism is moved after the first support plate 1 and the second support plate 2 are placed, so that the placement mechanism supports the first support plate 1 while avoiding blocking the teeth that need to be inspected, thereby facilitating the inspection of the patient's oral cavity, and the second support plate 2 can be raised by adjusting the clamping position of the expansion mechanism, thereby facilitating the increase of the degree of opening of the oral cavity, so as to facilitate the inspection of the oral cavity and molars. It is worth noting that the material used for the connecting part 3 is capable of expanding at a certain angle, which can meet the angle expansion when the second support plate 2 is supported upward, and will not break when the oral cavity is expanded.

[0037] Reference Figure 1-Figure 4 In a preferred embodiment, an expansion mechanism is provided, the expansion mechanism includes a mounting seat 4, a first mounting shaft 5, a support rod 6, a second mounting shaft 7 and a clamping seat 8, the mounting seat 4 is installed on the top of the first support plate 1, the first mounting shaft 5 is rotatably installed on the outside of the mounting seat 4, the support rod 6 is fixedly installed on the top of the first mounting shaft 5, and the second mounting shaft 7 is installed on the top of the support rod 6, the clamping seat 8 is installed on the bottom of the second support plate 2, a plurality of clamping seats 8 are provided, and the second mounting shaft 7 is clamped and matched with the clamping seat 8, so that the first mounting shaft 5 can be installed after the mounting seat 4 is installed, so that the support rod 6 can be installed to the first mounting Axis 5 is an axis, so that when the support rod 6 is rotated, the support rod 6 can drive the second mounting shaft 7 to rotate to the bottom of the clamping seat 8, and the second mounting shaft 7 can be clamped and matched with the clamping seat 8, so that the support rod 6 supports the second support plate 2, and the inclination angle of the second support plate 2 can be adjusted by adjusting the clamping position, so as to facilitate the support of the upper jaw, thereby increasing the degree of opening of the oral cavity. At the same time, it is worth noting that the above-mentioned mounting seat 4, the first mounting shaft 5, the support rod 6, the second mounting shaft 7 and the clamping seat 8 are a group, and two sets of expansion mechanisms are arranged on the top of the first support plate 1, and the clamping seats 8 in the two sets of expansion mechanisms are staggered.

[0038] Reference Figure 1-Figure 5In a preferred embodiment, the placement mechanism includes a sliding groove 9, and the sliding groove 9 is opened on both sides of the top of the first support plate 1, and a sliding block 10 is slidably installed in the inner cavity of the sliding groove 9, and a mounting block 11 is installed on the top of the sliding block 10, and a connecting block 12 is inserted on the outside of the mounting block 11, and a support block 13 is fixedly installed on the outside of the connecting block 12, and a compression pad 14 is installed at the bottom of the support block 13, which can make the sliding block 10 and the sliding groove 9 slide and cooperate, thereby facilitating the installation of the mounting block 11, so that the support block 1 can be placed on the support block 1 When pulled, the connecting block 12 is driven to slide in the inner cavity of the mounting block 11, and the supporting block 13 is moved outward to avoid that the patient's oral cavity is too large, resulting in the inability to place the squeezing pad 14 on the upper part of the patient's lower teeth. After the squeezing pad 14 is moved to the lower teeth, the first supporting plate 1 and the second supporting plate 2 are aligned to avoid that the first supporting plate 1 directly squeezes the tongue, causing discomfort to the patient. The squeezing pad 14 is made of elastic material, so that the squeezing pad 14 can fit with the lower teeth, and the squeezing pad 14 and the supporting block 13 can be prevented from sliding off when the patient moves the lower jaw.

[0039] In addition, a limiting groove 15 is provided on the surface of the connecting block 12, and there are several limiting grooves 15. A through groove 16 is provided on the top of the mounting block 11. A limiting plate 17 is installed on the side of the connecting block 12 away from the supporting block 13. A magnetic plate 18 is installed at the bottom of the inner cavity of the mounting block 11. A plug-in frame 19 is inserted into the inner cavity of the through groove 16, and the plug-in frame 19 passes through the limiting groove 15 and is adsorbed with the magnetic plate 18. By passing the plug-in frame 19 through the through groove 16 and the limiting groove 15, the magnetic plate 18 and the plug-in frame 19 can be adsorbed, thereby facilitating the limiting of the plug-in frame 19. After limiting, the plug-in frame 19 can limit the connecting block 12 to avoid the connection block 12 and the support block 13 from moving when the oral cavity and molars are inspected, thereby stably supporting the first support plate 1 and the second support plate 2.

[0040] Reference Figure 1-Figure 3In a preferred embodiment, the support mechanism includes a connecting pad 20, which is installed on the top of the second supporting plate 2, and the connecting pad 20 is arranged in a V shape. A soft pad 21 is installed on the top of the connecting pad 20, and a spring 22 is installed at the bottom of the inner wall of the connecting pad 20, and the spring 22 is provided with a plurality of groups, and the top of the spring 22 is connected to the top of the inner wall of the soft pad 21. Connecting strips 23 are installed on both sides of the inner wall of the connecting pad 20, so that the soft pad 21 can fit the patient's upper jaw, avoiding the second supporting plate 2 from directly squeezing the patient's upper jaw, causing the patient's upper jaw or upper gum to be squeezed and damaged, and the spring 23 in the connecting pad 20 2 can support the upper part of the connecting pad 20 and the soft pad 21, so that the patient's upper jaw has a movable space to avoid discomfort caused by long-term support, and can reduce the discomfort caused by slight activities. A pad 24 is installed at the bottom of the first support plate 1. The pad 24 is made of elastic material, and the surface of the pad 24 is arranged in an arc shape. The pad 24 fits with the inner side of the gums, and can fit the pad 24 with the inner side of the patient's lower teeth, so as to facilitate the adjustment of the positions of the first support plate 1 and the second support plate 2, avoid the first support plate 1 and the second support plate 2 from tilting to support the patient's upper jaw, causing discomfort to the patient, and can improve the comfort of the patient during examination.

[0041] Reference Figure 1-Figure 8In a preferred embodiment, a fixing seat 25 is installed on the top of the first support plate 1, and the fixing seat 25 is provided with a plurality of fixing seats, a mounting tube 26 is installed on the top of the fixing seat 25, and a suction rod 27 is inserted on the front of the mounting tube 26, so that the mounting tube 26 can be installed after the fixing seat 25 is installed, so that the suction rod 27 can be installed after the mounting tube 26 is installed, and the front side and the rear side of the bottom of the mounting tube 26 are respectively connected to the first connecting tube 28 and the second connecting tube 29, and the bottoms of the first connecting tube 28 and the second connecting tube 29 are respectively connected to the first suction tube 30 and the second suction tube 31. The first suction pipe 30 and the second suction pipe 31 are both rubber hoses. A first piston disc 32 is installed on the front side of the inner cavity of the mounting pipe 26, a mounting cylinder 33 is installed on the front side of the first piston disc 32, and a second piston disc 34 is installed on the rear side of the inner cavity of the mounting pipe 26. The back side of the suction rod 27 passes through the mounting cylinder 33 and the first piston disc 32 and extends to the front side of the second piston disc 34, so that the suction rod 27 can squeeze the first piston disc 32 or the second piston disc 34 when moving, so that when the first piston disc 32 or the second piston disc 34 moves, the saliva in the patient's mouth is sucked out through the first suction rod 27. The suction tube 30 or the second suction tube 31 is drawn into the installation tube 26 to prevent the saliva in the patient's mouth from affecting the inspection efficiency. At the same time, a gasket 36 is installed on the top of the inner cavity of the first connecting tube 28 and the second connecting tube 29. The gasket 36 is fan-shaped, and there are several gaskets 36. The gasket 36 is made of elastic material, which can make multiple groups of fan-shaped gaskets 36 form a complete circle, and then the first connecting tube 28 and the second connecting tube 29 can be blocked, so as to prevent the saliva drawn into the installation tube 26 from flowing back into the mouth, so as to facilitate the temporary storage of the drawn saliva. The suction tube 30 and the second suction tube 31 are not only rubber hoses, but the bottoms of the first suction tube 30 and the second suction tube 31 are also inclined, thereby preventing the first suction tube 30 and the second suction tube 31 from being adsorbed into the patient's mouth when extracting saliva, resulting in an inability to effectively extract the saliva in the patient's mouth. It is worth noting that the suction rod 27 is detachable from the mounting tube 33, thereby facilitating the removal of the suction rod 27 and avoiding affecting the operation when supporting the patient's mouth. The suction rod 27 can be inserted into the mounting tube 33 for use when in use.

[0042] In addition, an extrusion chamber 35 is provided at the top of the front side of the mounting tube 33, and a through chamber 37 is provided on the left side of the front side of the mounting tube 33. An extrusion block 38 is installed on the surface of the suction rod 27, and the extrusion block 38 is plugged into the extrusion chamber 35. After the extrusion block 38 is inserted into the extrusion chamber 35, the mounting tube 33 can be pushed, thereby generating negative pressure between the first piston disk 32 and the front side of the inner cavity of the mounting tube 26, so as to extract saliva from the outside of the gums. After the suction rod 27 is moved and the extrusion block 38 is inserted into the through chamber 37, the suction rod 27 can drive the second piston disk 34 to move, so that negative pressure is generated between the second piston disk 34 and the first piston disk 32, thereby facilitating the extraction of saliva between the inside of the gums and the tongue. It is worth mentioning here that the first suction tube 30 and the second suction tube 31 in the same mounting tube 26 do not have the effect of simultaneous extraction, and the saliva in the patient's mouth can be extracted according to specific extraction needs.

[0043] Specifically, the working process or working principle of the oral opener is as follows: when in use, the patient's mouth is first opened, the first support plate 1 and the second support plate 2 are placed in the patient's mouth, and the first support plate 1 is moved so that the first support plate 1 drives the pad 24 to fit the inner side of the patient's lower teeth, and then the angles of the first support plate 1 and the second support plate 2 are adjusted so that the squeezing pad 14 can fit the patient's lower teeth. When the squeezing pad 14 fails to fit the patient's lower teeth, the plug-in frame 19 needs to be moved upward and the support block 13 is moved until the squeezing pad 14 can fit the patient's lower teeth. The tongue is pressed together and then the insertion frame 19 is inserted into the mounting block 11 to limit the connection block 12 to prevent the first support plate 1 from directly squeezing the tongue and causing discomfort to the patient. During this period, the patient needs to keep his mouth open. When the degree of opening of the patient's mouth needs to be adjusted, the patient needs to open his mouth wide, separate the second mounting shaft 7 from the clamping seat 8, and rotate the support rod 6 backward so that the second mounting shaft 7 is clamped into the clamping seat 8 on the rear side, thereby supporting the patient's mouth, thereby facilitating the inspection of the patient's mouth. When the patient needs to adjust the mouth between the outer side of the gums and the lower lip, When water is sucked, the suction rod 27 is pulled outward, and the extrusion block 38 is inserted into the extrusion chamber 35, and then the suction rod 27 is squeezed, so that the suction rod 27 drives the first piston disc 32 and the second piston disc 34 to move, so that the first piston disc 32 and the front side of the inner cavity of the mounting tube 26 generate negative pressure, and then the saliva between the outer side of the gums and the lower lip can be sucked through the first suction tube 30 and the first connecting tube 28. At this time, the second piston disc 34 moves simultaneously with the first piston disc 32, so that no negative pressure is generated between the second piston disc 34 and the first piston disc 32. Saliva is sucked out. When it is necessary to suck out the saliva between the inner side of the patient's lower gum and the tongue, the unused suction rod 27 is pulled outward, and the squeezing block 38 is rotated to an angle aligned with the through cavity 37, so that when the suction rod 27 is squeezed, the suction rod 27 can drive the second piston disc 34 to move, so that negative pressure is generated between the second piston disc 34 and the first piston disc 32, and then the saliva between the inner side of the patient's lower gum and the tongue is sucked out through the second suction tube 31 and the second connecting tube 29, thereby avoiding the saliva secreted by the patient's mouth for a long time affecting the inspection efficiency.

Claims

1. An oral opening device, comprising a first support plate (1) and a second support plate (2), characterized in that; A connecting portion (3) is installed on the back of the first support plate (1), and the top of the front of the connecting portion (3) is connected to the back of the second support plate (2), the rear sides of both sides of the top of the first support plate (1) are provided with a placing mechanism, and the top of the second support plate (2) is installed with a supporting mechanism; An expansion mechanism, the expansion mechanism comprising: A mounting seat (4), wherein the mounting seat (4) is mounted on the top of the first support plate (1); A first mounting shaft (5), the first mounting shaft (5) being rotatably mounted on the outer side of the mounting seat (4); A support rod (6), wherein the support rod (6) is fixedly mounted on the top of the first mounting shaft (5), and a second mounting shaft (7) is mounted on the top of the support rod (6); A clamping seat (8), the clamping seat (8) is installed at the bottom of the second support plate (2), a plurality of the clamping seats (8) are provided, and the second installation shaft (7) is clamped and matched with the clamping seat (8).

2. The oral cavity opener according to claim 1, characterized in that: The placement mechanism comprises a sliding groove (9), and the sliding groove (9) is arranged on both sides of the top of the first support plate (1), a sliding block (10) is slidably installed in the inner cavity of the sliding groove (9), a mounting block (11) is installed on the top of the sliding block (10), a connecting block (12) is inserted on the outer side of the mounting block (11), a supporting block (13) is fixedly installed on the outer side of the connecting block (12), and a pressing pad (14) is installed on the bottom of the supporting block (13).

3. The oral cavity opener according to claim 2, characterized in that: The surface of the connecting block (12) is provided with a limiting groove (15), and a plurality of limiting grooves (15) are provided. The top of the mounting block (11) is provided with a through groove (16). A limiting plate (17) is installed on the side of the connecting block (12) away from the supporting block (13). A magnetic attraction plate (18) is installed at the bottom of the inner cavity of the mounting block (11). A plug-in frame (19) is plugged into the inner cavity of the through groove (16), and the plug-in frame (19) penetrates the limiting groove (15) and is adsorbed by the magnetic attraction plate (18).

4. The oral cavity opener according to claim 1, characterized in that: The support mechanism comprises a connection pad (20), wherein the connection pad (20) is mounted on the top of the second support plate (2), and the connection pad (20) is arranged in a V shape, a soft pad (21) is mounted on the top of the connection pad (20), a spring (22) is mounted on the bottom of the inner wall of the connection pad (20), and the spring (22) is arranged in a plurality of groups, the top of the spring (22) is connected to the top of the inner wall of the soft pad (21), and connecting strips (23) are mounted on both sides of the inner wall of the connection pad (20).

5. The oral cavity retractor according to claim 1, characterized in that: A cushion block (24) is installed at the bottom of the first support plate (1); the cushion block (24) is made of elastic material, and the surface of the cushion block (24) is arranged in an arc shape.

6. The oral cavity retractor according to claim 1, characterized in that: A fixing seat (25) is installed on the top of the first support plate (1), and a plurality of fixing seats (25) are provided. A mounting tube (26) is installed on the top of the fixing seat (25), and a suction rod (27) is inserted on the front of the mounting tube (26).

7. The oral cavity opener according to claim 6, characterized in that: The front side and the rear side of the bottom of the installation tube (26) are respectively connected to a first connecting tube (28) and a second connecting tube (29); the bottoms of the first connecting tube (28) and the second connecting tube (29) are respectively connected to a first suction tube (30) and a second suction tube (31); and both the first suction tube (30) and the second suction tube (31) are rubber hoses.

8. The oral cavity opener according to claim 6, characterized in that: A first piston disc (32) is installed on the front side of the inner cavity of the mounting tube (26), a mounting cylinder (33) is installed on the front side of the first piston disc (32), a second piston disc (34) is installed on the rear side of the inner cavity of the mounting tube (26), and the back side of the suction rod (27) passes through the mounting cylinder (33) and the first piston disc (32) and extends to the front side of the second piston disc (34).

9. The oral cavity retractor according to claim 8, characterized in that: An extrusion cavity (35) is provided at the top of the front face of the installation cylinder (33), a through cavity (37) is provided at the left side of the front face of the installation cylinder (33), and an extrusion block (38) is installed on the surface of the suction rod (27), and the extrusion block (38) is plugged into the extrusion cavity (35).

10. The oral cavity retractor according to claim 7, characterized in that: A sealing gasket (36) is installed at the top of the inner cavity of the first connecting tube (28) and the second connecting tube (29). The sealing gasket (36) is arranged in a fan shape, and there are a plurality of sealing gaskets (36). The sealing gasket (36) is made of elastic material.

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