Oral teaching training model

Abstract

The utility model relates to the field of medical teaching model, specifically disclose a kind of oral teaching training model, comprising: stand, upper frame, lower frame, upper dental bed part, lower dental bed part and tongue body part, detachable face skin cover is sleeved on upper frame and lower frame and face skin cover is clamped by first clamping assembly and second clamping assembly, to facilitate the disassembly and cleaning of face skin cover;Upper dental bed part and lower dental bed part are respectively clamped by upper telescopic part and lower telescopic part and can be realized from the mouth of face skin cover to the outside, so that the teeth inside can be exposed, facilitate its explanation display and disassembly.

Description

Technical Field

[0001] This utility model belongs to the field of medical teaching models, and specifically relates to an oral teaching and training model. Background Technology

[0002] Oral teaching aids are primarily used to identify tooth structure and for medical students to practice on. Existing oral teaching aids typically only include models of the upper and lower jawbones and alveoli, with an open structure lacking features such as facial skin and tongue. This makes it difficult for students to gain a realistic understanding of the actual oral environment during practice, resulting in a lack of realism. Furthermore, they cannot demonstrate the use of saliva suction tubes and dental pads. Therefore, some oral teaching aids on the market add a rubber, simulated facial skin structure between the upper and lower jawbones. However, this type of oral teaching aid obscures some teeth on the inner part of the upper and lower alveoli, making it extremely inconvenient to explain the internal tooth structure or disassemble tooth models. Additionally, the simulated facial skin structure is difficult to clean and disinfect after practice.

[0003] Patent application number "2023218303268" discloses a novel oral care model, comprising: a model section for demonstration operation; a telescopic section, the top of which is detachably connected to the telescopic section for adjusting the height of the model section; and a support section connected to the bottom of the telescopic section for supporting the model section and the telescopic section. The model section contains upper and lower jaws and a tongue positioned between the upper and lower jaws, as well as upper and lower cheeks. Several types and positions of adjustable teeth are distributed on the jaws. The jaws are connected to a connecting component, and the tongue is connected to a rocker arm, allowing the jaws and tongue to be adjusted at variable angles under the control of the connecting component and the rocker arm. While the oral care model in this prior art includes upper and lower cheeks, it is a fixed structure that cannot be removed, making cleaning and disinfection inconvenient. Furthermore, the internal tooth structure of the upper and lower jaws is deeply embedded inside the oral cavity, making explanation and observation difficult.

[0004] The above background information is provided only to assist in understanding the utility model concept and technical solution of this utility model, and it does not necessarily belong to the prior art of this patent application. In the absence of clear evidence that the above information was disclosed on the filing date of this patent application, the above background information should not be used to evaluate the novelty and inventiveness of this application. Utility Model Content

[0005] The purpose of this utility model is to provide an oral teaching and training model, thereby overcoming the shortcomings of existing oral models, such as the inconvenience of cleaning and disinfecting the skin part and the easy obstruction of the teeth close to the inside of the upper and lower jaws, making it inconvenient to explain, demonstrate and disassemble.

[0006] To achieve the above objectives, this utility model provides an oral teaching and training model, including an upper articulator and a lower articulator. One end of the lower articulator is rotatably connected to one end of the upper articulator. The bottom of the upper articulator is provided with an upper jaw portion, and the top of the lower articulator is provided with a lower jaw portion. The upper and lower articulators are covered with a face mask, one end of which is provided with a mouth opening. The upper jaw portion is connected to the upper articulator via an upper telescopic part and can extend outward from the mouth opening. The lower jaw portion is connected to the lower articulator via a lower telescopic part and can extend outward from the mouth opening. The lower articulator is provided with a tongue portion.

[0007] Preferably, the above technical solution further includes a support frame, which includes a base, a vertical pole, and a fork. One end of the vertical pole is fixedly connected to the base, and the other end of the vertical pole is rotatably connected to one end of the fork, with the rotation axis coinciding with the axis of the vertical pole. The other end of the fork is provided with two mutually spaced fork arms. One end of the upper frame is provided with a downwardly inclined first curved arm, the end of which is rotatably connected to the end of the fork arm and fitted with a first locking bolt.

[0008] Preferably, in the above technical solution, the other end of the lower frame is provided with an upwardly inclined second curved arm, and the end of the second curved arm is rotatably connected to the middle of the first curved arm through a second locking bolt.

[0009] Preferably, in the above technical solution, the other end of the face mask has an opening, and one end of the upper frame and one end of the lower frame can be fitted into the face mask through the opening.

[0010] Preferably, in the above technical solution, the top of the upper frame is provided with a first clamping component, and the bottom of the lower frame is provided with a second clamping component. The first clamping component and the second clamping component can clamp the edge of the mask opening to prevent the face mask from falling off.

[0011] Preferably, in the above technical solution, the first clamping assembly includes a first rubber pad, a first bracket, a first pressure plate, a first pad, and a first adjusting bolt. The first rubber pad is fixedly connected to the top of the upper frame. One end of the first bracket is fixedly connected to the upper frame. The other end of the first bracket is bent upwards towards the first rubber pad. The first adjusting bolt is threadedly connected to the other end of the first bracket. The end of the first adjusting bolt is rotatably connected to the top of the first pressure plate. The first pad is fixedly installed at the bottom of the first pressure plate and is positioned opposite to the first rubber pad.

[0012] Preferably, in the above technical solution, the second clamping assembly includes a second rubber pad, a second bracket, a second pressure plate, a second pad, and a second adjusting bolt. The second rubber pad is fixedly connected to the bottom of the lower frame. One end of the second bracket is fixedly connected to the lower frame, and the other end of the second bracket is bent downwards towards the second rubber pad. The second adjusting bolt is threadedly connected to the other end of the second bracket. The end of the second adjusting bolt is rotatably connected to the bottom of the second pressure plate. The second pad is fixedly installed on the top of the second pressure plate and is positioned opposite to the second rubber pad.

[0013] Preferably, in the above technical solution, the side of the face mask is provided with a stretching part, the stretching part arches outward of the face mask, and the mouth opening is opened at the stretching part.

[0014] Preferably, in the above technical solution, the upper telescopic part includes an upper sleeve and an upper telescopic rod. The upper sleeve is fixedly connected to the upper frame, one end of the upper telescopic rod is fixedly connected to one end of the upper jaw portion, and the other end of the upper telescopic rod is slidably sleeved in the upper sleeve. The lower telescopic part includes a lower sleeve and a lower telescopic rod. The lower sleeve is fixedly connected to the lower frame, one end of the lower telescopic rod is fixedly connected to one end of the lower jaw portion, and the other end of the lower telescopic rod is slidably sleeved in the lower sleeve.

[0015] Preferably, in the above technical solution, one end of the lower frame is provided with a mounting plate, the mounting plate is provided with a rotatable ball joint, one end of the ball joint is connected to the root of the tongue part through a connecting spring, and the other end of the ball joint is provided with a handle.

[0016] Compared with existing technologies, this utility model has the following beneficial effects: 1. The oral teaching and training model of this utility model has a detachable face mask on the upper and lower occlusal frames, which is clamped by the first and second clamping components, thus facilitating the removal and cleaning of the face mask; the upper and lower jaw parts can extend outward from the mouth opening of the face mask through the upper and lower telescopic parts, respectively, so as to expose the teeth inside, which is convenient for explanation, demonstration and disassembly.

[0017] 2. The face mask of this utility model is made of silicone and has a mouth opening and a sleeve opening at both ends. The sleeve opening makes it easy to put on and take off the face mask. An outwardly arched stretching part is provided on the side of the face mask, which allows the face mask to have a greater elasticity when the upper and lower frames are opened. It can also more realistically imitate the tympanic cavity area between the two sides of the human mouth and the two sides of the gums, making the imitation of the inside of the mouth more realistic.

[0018] 3. The present invention also includes a tongue section for training the operation of a saliva suction tube. The base of the tongue section is connected to the handle via a rotatable ball joint. The position of the tongue section can be changed by manipulating the handle. Furthermore, the base of the tongue section is connected to the ball joint via a connecting spring, which can better mimic the elasticity of a real tongue and avoid the saliva suction tube when it is inserted.

[0019] 4. In this utility model, both the first clamping component and the second clamping component are clamped and fixed by using bolts to drive the pressure plate to press against the rubber pad seat. Compared with ordinary elastic clamping, it has a stronger clamping force. In addition, the rubber pad seat and the pad under the pressure plate are both made of rubber, which can increase the friction between the face mask and prevent blunt force damage to the edge of the face mask, thus extending the service life of the face mask.

[0020] 5. The stand in this utility model can support the model to facilitate teaching, observation and demonstration. It is equipped with two forked arms that are far apart from each other. Its symmetrical structure can provide balanced support force, and the distance between the two forked arms can also make way for the handle of the operating tongue. Attached Figure Description

[0021] Figure 1 This is a structural diagram of the oral teaching and training model of this utility model.

[0022] Figure 2 This is a structural diagram of the upper and lower assemblies after they are opened.

[0023] Figure 3 This is a structural diagram from another angle after the upper and lower frames are opened.

[0024] Figure 4 This is a partial cross-sectional view of the lower frame and tongue.

[0025] Figure 5 It is a diagram of the structure of the upper and lower jaws after they have extended.

[0026] Figure 6 This is a structural diagram of the face mask.

[0027] Explanation of key figure labels: 100 - Upper frame, 110 - First articulated arm, 120 - Upper sleeve, 130 - Upper telescopic rod; 200-Lower frame, 210-Second articulated arm, 220-Lower sleeve, 230-Lower telescopic rod, 240-Second locking bolt; 300 - Upper jaw region; 400 - Lower jaw region; 500 - Face mask, 510 - Mouth opening, 520 - Mask opening, 530 - Stretchable part; 600-Tongue part, 610-Mounting plate, 620-Ball joint, 630-Connecting spring, 640-Handle, 650-Nut; 700-Upright frame, 710-Base, 720-Upright pole, 730-Fork rod, 740-Fork arm, 750-First locking bolt; 800-First clamping assembly, 810-First rubber pad, 820-First bracket, 830-First pressure plate, 840-First pad, 850-First adjusting bolt, 851-First bolt tab, 860-First slot; 900 - Second clamping assembly, 910 - Second rubber pad, 920 - Second bracket, 930 - Second pressure plate, 940 - Second pad, 950 - Second adjusting bolt, 951 - Second bolt tab, 960 - Second slot, 970 - Preload spring. Detailed Implementation

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0029] In the description of this utility model, it should be noted that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "top surface", "bottom surface", "inner", "outer", "inner side", "outer side", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0030] In the description of this invention, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. Where the terms "first," "second," and "third" are used for descriptive purposes and to distinguish technical features, they should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the sequential relationship of the indicated technical features.

[0031] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "setting" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances. The embodiments of this utility model will now be described based on its overall structure.

[0032] like Figures 1 to 6 As shown, the oral teaching training model in this embodiment includes: an upper jaw frame 100, a first curved arm 110, an upper sleeve 120, an upper telescopic rod 130, a lower jaw frame 200, a second curved arm 210, a lower sleeve 220, a lower telescopic rod 230, an upper jaw section 300, a lower jaw section 400, a face mask 500, a mouth opening 510, a mask opening 520, a stretching section 530, a tongue section 600, a mounting plate 610, a ball joint 620, a connecting spring 630, a handle 640, a stand 700, a base 710, and a pole 72. 0. Fork lever 730, fork arm 740, first locking bolt 750, first clamping assembly 800, first rubber pad 810, first bracket 820, first pressure plate 830, first pad 840, first adjusting bolt 850, first bolt tab 851, first slot 860, second clamping assembly 900, second rubber pad 910, second bracket 920, second pressure plate 930, second pad 940, second adjusting bolt 950, second bolt tab 951, second slot 960, preload spring 970.

[0033] The support frame 700 includes a base 710, a vertical pole 720, and a fork 730. One end of the vertical pole 720 is fixedly connected to the base 710, and the other end of the vertical pole 720 is rotatably connected to one end of the fork 730, with the axis of rotation coinciding with the axis of the vertical pole 720. The other end of the fork 730 is provided with two mutually spaced fork arms 740. The upper frame 100 and the lower frame 200 are U-shaped structures. The open end of the upper frame 100 is symmetrically provided with two downwardly inclined first curved arms 110. The ends of the first curved arms 110 are connected to the ends of the fork arms 740. The upper jaw 100 is rotatably connected to and equipped with a first locking bolt 750. Two upwardly inclined second curved arms 210 are symmetrically arranged at the open end of the lower jaw 100. The ends of the second curved arms 210 are rotatably connected to the middle of the first curved arm 110 via second locking bolts 240. The nut end of the second locking bolts 240 is provided with a flat handle. The upper jaw 300 is installed at the bottom of the upper jaw 100, and the lower jaw is installed at the top of the lower jaw 200. The upper jaw 100 and the lower jaw 200 are covered by a faceplate 500. Made of silicone material, the face mask 500 has an opening 510 at one end and a cover opening 520 at the other end. One end of the upper frame 100 and one end of the lower frame 200 can be fitted into the face mask 500 through the cover opening 520. The side of the face mask 500 has a stretching part 530, which arches outward. The opening 510 is located at the stretching part 530. When the upper frame 100 and the lower frame 200 are opened, the upper and lower ends of the stretching part 530 can be stretched and extended. (Upper jaw area) 300 is connected to the upper frame 100 via the upper telescopic part and can extend outward from the mouth opening 510. The lower jaw part 400 is connected to the lower frame 200 via the lower telescopic part and can extend outward from the mouth opening 510. The tongue part 600 is installed inside the lower frame 200. A first clamping assembly 800 is installed on the top of the upper frame 100 and a second clamping assembly 900 is installed on the bottom of the lower frame 200. The first clamping assembly 800 and the second clamping assembly 900 can clamp the edge of the mask opening 520 to prevent the mask 500 from falling off.

[0034] More specifically, the first clamping assembly 800 includes a first rubber pad 810, a first bracket 820, a first pressure plate 830, a first pad 840, and a first adjusting bolt 850. The first rubber pad 810 is fixedly connected to the top of the upper clamping frame 100. One end of the first bracket 820 is fixedly connected to the upper clamping frame 100, and the other end of the first bracket 820 is bent upwards towards the first rubber pad 810. The first adjusting bolt 850 is threadedly connected to the other end of the first bracket 820. A first bolt tab 851 is provided at the end of the first adjusting bolt 850. A first slot 860 is provided on the top of the first pressure plate 830. The bolt tab 851 can be locked in the first slot 860 and rotate. The first pad 840 is fixedly installed at the bottom of the first pressure plate 830 and is opposite to the position of the first rubber pad seat 810. There are two first adjusting bolts 850, which are symmetrically arranged along the center line of the upper frame 100. A pre-tightening spring 970 is fitted on the first adjusting bolt 850. The top of the pre-tightening spring 970 abuts against the bottom of the nut end of the first adjusting bolt 850 through a washer. The bottom of the pre-tightening spring 970 abuts against the top of the first bracket 820 and is compressed. The first rubber pad seat 810 and the first pad 840 are both made of rubber material.

[0035] More specifically, the second clamping assembly 900 includes a second rubber pad 910, a second bracket 920, a second pressure plate 930, a second pad 940, and a second adjusting bolt 950. The second rubber pad 910 is fixedly connected to the bottom of the lower clamping frame 200. One end of the second bracket 920 is fixedly connected to the lower clamping frame 200, and the other end of the second bracket 920 is bent downwards towards the second rubber pad 910. The second adjusting bolt 950 is threadedly connected to the other end of the second bracket 920. A second bolt tab 951 is provided at the end of the second adjusting bolt 950. A second slot 960 is provided at the bottom of the second pressure plate 930, and the second bolt tab 951 can be engaged in the second slot 960. Within 60 degrees, the second pad 940 is fixedly installed on the top of the second pressure plate 930 and is positioned opposite the second rubber pad 910. There are two second adjusting bolts 950, which are symmetrically arranged along the center line of the lower frame 200. A pre-tightening spring 970 is fitted on the second adjusting bolt 950. The bottom end of the pre-tightening spring 970 abuts against the top of the nut end of the second adjusting bolt 950 through a washer. The top end of the pre-tightening spring 970 abuts against the bottom of the second bracket 920 and is compressed. Both the second rubber pad 910 and the second pad 940 are made of rubber material. The top surface of the first rubber pad 810 and the bottom surface of the second rubber pad 910 are provided with transverse anti-slip textures.

[0036] More specifically, the upper telescopic part includes an upper sleeve 120 and an upper telescopic rod 130. The upper sleeve 120 is fixedly connected to the upper frame 100. One end of the upper telescopic rod 130 is fixedly connected to one end of the upper jaw portion 300, and the other end of the upper telescopic rod 130 is slidably sleeved inside the upper sleeve 120. The lower telescopic part includes a lower sleeve 220 and a lower telescopic rod 230. The lower sleeve 220 is fixedly connected to the lower frame 200. One end of the lower telescopic rod 230 is fixedly connected to one end of the lower jaw portion 400, and the other end of the lower telescopic rod 230 is slidably sleeved inside the lower sleeve 220.

[0037] Additionally, a mounting plate 610 is provided at one end of the lower frame 200. A spherical groove is provided on the mounting plate 610, and a rotatable ball joint 620 is installed in the spherical groove. The outer periphery of the spherical groove is provided with an annular protrusion and the outer periphery is machined with external threads that can match the nut 650. When the nut 650 is tightened, it can press the ball joint 620 into the spherical groove and lock it in place. One end of the ball joint 620 is connected to the root of the tongue part 600 through a connecting spring 630. The other end of the ball joint 620 is provided with a handle 640. The tongue part 600 is made of silicone material.

[0038] Next, the working principle of an oral teaching and training model in this embodiment will be described in detail to enable those skilled in the art to better understand this utility model: In use, the stand 700 can support the upper frame 100 and the lower frame 200. The pitch angle of the upper frame 100 can be adjusted by adjusting the first locking bolt 750, and the included angle between the lower frame 200 and the upper frame 100 can be adjusted by adjusting the second locking bolt 240. The face mask 500 can be fitted onto the upper frame 100 and the lower frame 200 from the arc-shaped ends of the upper frame 100 and the lower frame 200 through its end opening 520. The edge of the opening 520 can be clamped and fixed by the first pad 840 and the first rubber pad 810 of the first clamping assembly 800, and the second pad 940 and the second rubber pad 910 of the second clamping assembly 900. The stretching portion 530 on the side of the face mask 500 arches outward. Not only can it form a certain gap with the sides of the upper jaw 300 and lower jaw 400 to achieve a more realistic effect, but it can also play a certain role in buffering and stretching when the upper jaw 100 and lower jaw 200 are opened, preventing the sides of the face mask 500 from being torn. The root of the tongue body 600 is connected to the ball joint 620 through the connecting spring 630. When the saliva suction tube is inserted into the oral cavity model, the tongue body 600 has a certain elasticity, which can more realistically imitate the real oral cavity structure. When it is necessary to move the angle of the tongue body 600, the nut 650 at the ball joint 620 can be loosened first to relax the ball joint 620, the angle of the tongue body 600 can be adjusted by manipulating the handle 640, and then the nut 650 can be tightened to position the tongue body 600.

[0039] When it is necessary to observe the teeth inside the upper jaw portion 300 and the lower jaw portion 400 or to disassemble the teeth inside, the upper jaw portion 300 and the lower jaw portion 400 can be pulled outwards so that they are outside the mouth opening 510 for observation. After observation, they can be pushed back inwards to reset them.

[0040] In summary, the oral teaching and training model in this embodiment uses a detachable face mask 500 fitted onto the upper articulator 100 and lower articulator 200, and clamps the face mask 500 with the first clamping component 800 and the second clamping component 900, thereby facilitating the removal and cleaning of the face mask 500. The upper jaw portion 300 and the lower jaw portion 400 can extend outward from the mouth opening 510 of the face mask 500 through the upper telescopic part and the lower telescopic part, respectively, thereby exposing the internal teeth and facilitating their explanation, demonstration, and removal.

[0041] The foregoing description of specific exemplary embodiments of the present invention is for illustrative and explanatory purposes. These descriptions are not intended to limit the present invention to the precise forms disclosed, and it is obvious that many changes and variations can be made based on the above teachings. Although embodiments of the present invention have been shown and described, these specific embodiments are merely explanations of the present invention and are not intended to limit the invention. The specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. The purpose of selecting and describing exemplary embodiments is to explain the specific principles of the present invention and its practical application, so that those skilled in the art, after reading this specification, can make modifications, substitutions, variations, and various choices and changes to the embodiments as needed without departing from the principles and spirit of the present invention, provided that such modifications, substitutions, variations, and choices and changes are within the scope of the claims of the present invention and are protected by patent law.

Claims

1. An oral teaching and training model, comprising an upper articulator and a lower articulator, one end of the lower articulator being rotatably connected to one end of the upper articulator, the lower articulator having an upper jaw portion at its bottom, and the lower articulator having a lower jaw portion at its top; characterized in that: The upper jaw and the lower jaw are covered with a face mask. One end of the face mask is provided with a mouth opening. The upper jaw part is connected to the upper jaw via an upper telescopic part and can extend outward from the mouth opening. The lower jaw part is connected to the lower jaw via a lower telescopic part and can extend outward from the mouth opening. The lower jaw is provided with a tongue part.

2. The oral teaching and training model according to claim 1, characterized in that, It also includes a support frame, which includes a base, a vertical pole, and a fork. One end of the vertical pole is fixedly connected to the base, and the other end of the vertical pole is rotatably connected to one end of the fork, with the axis of rotation coinciding with the axis of the vertical pole. The other end of the fork is provided with two mutually spaced fork arms. One end of the upper frame is provided with a downwardly inclined first curved arm, the end of which is rotatably connected to the end of the fork arm and fitted with a first locking bolt.

3. The oral teaching and training model according to claim 2, characterized in that, The other end of the lower frame is provided with an upwardly inclined second curved arm, and the end of the second curved arm is rotatably connected to the middle of the first curved arm by a second locking bolt.

4. The oral teaching and training model according to claim 1, characterized in that, The other end of the face mask has an opening, and one end of the upper frame and one end of the lower frame can be fitted into the face mask through the opening.

5. The oral teaching and training model according to claim 4, characterized in that, The top of the upper frame is provided with a first clamping component, and the bottom of the lower frame is provided with a second clamping component. The first clamping component and the second clamping component can clamp the edge of the mask opening to prevent the face mask from falling off.

6. The oral teaching and training model according to claim 5, characterized in that, The first clamping assembly includes a first rubber pad, a first bracket, a first pressure plate, a first pad, and a first adjusting bolt. The first rubber pad is fixedly connected to the top of the upper frame. One end of the first bracket is fixedly connected to the upper frame, and the other end of the first bracket is bent upward toward the first rubber pad. The first adjusting bolt is threadedly connected to the other end of the first bracket. The end of the first adjusting bolt is rotatably connected to the top of the first pressure plate. The first pad is fixedly installed at the bottom of the first pressure plate and is positioned opposite to the first rubber pad.

7. The oral teaching and training model according to claim 5, characterized in that, The second clamping assembly includes a second rubber pad, a second bracket, a second pressure plate, a second pad, and a second adjusting bolt. The second rubber pad is fixedly connected to the bottom of the lower frame. One end of the second bracket is fixedly connected to the lower frame, and the other end of the second bracket is bent downwards towards the second rubber pad. The second adjusting bolt is threadedly connected to the other end of the second bracket. The end of the second adjusting bolt is rotatably connected to the bottom of the second pressure plate. The second pad is fixedly installed on the top of the second pressure plate and is positioned opposite to the second rubber pad.

8. The oral teaching and training model according to claim 5, characterized in that, The face mask has a stretchable part on its side, which arches outward from the face mask, and the mouth opening is located at the stretchable part.

9. The oral teaching and training model according to claim 1, characterized in that, The upper telescopic part includes an upper sleeve and an upper telescopic rod. The upper sleeve is fixedly connected to the upper frame. One end of the upper telescopic rod is fixedly connected to one end of the upper jaw portion. The other end of the upper telescopic rod is slidably sleeved inside the upper sleeve. The lower telescopic part includes a lower sleeve and a lower telescopic rod. The lower sleeve is fixedly connected to the lower frame. One end of the lower telescopic rod is fixedly connected to one end of the lower jaw portion. The other end of the lower telescopic rod is slidably sleeved inside the lower sleeve.

10. The oral teaching and training model according to claim 1, characterized in that, One end of the lower frame is provided with a mounting plate, and the mounting plate is provided with a rotatable ball joint. One end of the ball joint is connected to the root of the tongue part through a connecting spring, and the other end of the ball joint is provided with a handle.

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