A simple mouth-opening exercise device that can measure tooth spacing.

Abstract

This utility model discloses a simple mouth-opening exercise device for measuring tooth distance, including an upper dental tray and a lower dental tray. An upper operating pressure plate is fixed to the right side of the upper dental tray, and a lower operating pressure plate is disposed on the right side of the lower dental tray. An angular movable structure is provided between the lower dental tray and the lower operating pressure plate. Two lower extension plates are fixed to the top of the lower operating pressure plate, and a mounting shaft is fixed between the two lower extension plates. Two upper extension plates are fixed to the bottom of the upper operating pressure plate, and the upper extension plates are rotatably connected to the surface of the mounting shaft. A torsion spring is mounted on the surface of the mounting shaft. A measuring structure is provided on the surface of the upper operating pressure plate, and a locking structure is provided at the bottom of the upper operating pressure plate. This utility model solves the problems of existing technologies that cannot be finely adjusted, cannot measure incisor distance in real time, and are cumbersome to operate.

Description

Technical Field

[0001] This utility model relates to the field of oral rehabilitation equipment technology, specifically a simple mouth-opening exercise device that can measure tooth spacing. Background Technology

[0002] After radiotherapy for head and neck tumors, patients often experience limited mouth opening due to fibrosis of the masticatory muscles, leading to difficulty in opening their mouths. Clinically, it is necessary to regularly measure the distance between the incisors and guide patients to perform progressive mouth opening exercises.

[0003] A search of Chinese patent publication number CN211912593U reveals an open-mouth training device.

[0004] This utility model includes an upper pressure plate and a lower pressure plate, which are hinged together. A return torsion spring is fixed between the upper and lower pressure plates. Upper and lower alveolar supports are fixed to the ends of the upper and lower pressure plates, respectively. An arc-shaped adjustment plate is fixed to the rear of the upper pressure plate. A through hole is formed in the lower pressure plate, through which the arc-shaped adjustment plate passes. An arc-shaped groove is formed on the arc-shaped adjustment plate, and a pin hole is formed in the arc-shaped groove. A threaded pin is threadedly connected to the lower pressure plate. The smooth section of the threaded pin is inserted into the arc-shaped groove. When the upper and lower pressure plates are pressed, the threaded pin can slide along the arc-shaped groove and can be inserted into the pin hole to lock the angle between the upper and lower pressure plates. This mouth-opening exercise device does not affect the patient's normal ventilation and does not require repeated removal or insertion from the mouth. The mouth-opening exercise device can be adjusted in multiple levels according to needs to meet the patient's mouth-opening exercise requirements at different times.

[0005] However, the patent still has the following problems: The device has two shortcomings: 1. It cannot be infinitely fixed: its opening angle can only be locked in five levels in 1cm increments, which cannot achieve fine adjustment of any angle and is difficult to match the individualized mouth opening needs of different patients. 2. It cannot measure the distance between the incisors: patients or medical staff need to use a ruler to measure repeatedly, which is inconvenient to operate and has a large error. Utility Model Content

[0006] The purpose of this invention is to provide a simple mouth-opening exercise device that can measure tooth pitch, in order to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a simple mouth-opening exercise device for measuring tooth pitch, comprising an upper dental tray and a lower dental tray. An upper operating pressure plate is fixed to the right side of the upper dental tray, and a lower operating pressure plate is provided to the right side of the lower dental tray. An angle-moving structure is provided between the lower dental tray and the lower operating pressure plate. Two lower extension plates are fixed to the top of the lower operating pressure plate, and a mounting shaft is fixed between the two lower extension plates. Two upper extension plates are fixed to the bottom of the upper operating pressure plate. The upper extension plates are rotatably connected to the surface of the mounting shaft. A torsion spring is installed on the surface of the mounting shaft. A measuring structure is provided on the surface of the upper operating pressure plate, and a locking structure is provided at the bottom of the upper operating pressure plate.

[0008] As a preferred embodiment of this utility model of a simple mouth-opening exercise device capable of measuring tooth pitch, the measuring structure on the surface of the upper operating pressure plate includes an arc-shaped scale plate, which is fixedly connected to the front and rear sides of the surface of the upper operating pressure plate, and an indicator plate for use with the arc-shaped scale plate is fixed on the surface of the lower extension plate.

[0009] As a preferred embodiment of this utility model of a simple mouth-opening exercise device capable of measuring tooth pitch, the bottom locking structure of the upper operating pressure plate includes a ball head seat, which is fixedly connected to the bottom of the upper operating pressure plate. A connecting ball head is slidably connected to the inner wall of the ball head seat, and a lead screw is fixed to the bottom of the connecting ball head. The surface of the lower operating pressure plate is provided with a movable groove through which the lead screw passes, and a stop block is threadedly connected to the surface of the lead screw. The stop block is located below the lower operating pressure plate.

[0010] As a preferred embodiment of this utility model of a simple mouth-opening exercise device capable of measuring tooth pitch, the arc-shaped scale plate is made of acrylic material.

[0011] As a preferred embodiment of this invention, a simple mouth-opening exercise device capable of measuring tooth pitch, the indicator plate surface is provided with a fluorescent coating.

[0012] As a preferred embodiment of this utility model of a simple mouth-opening exercise device capable of measuring tooth spacing, both the upper and lower dental trays are made of medical-grade polypropylene and have an antibacterial coating on their surfaces.

[0013] As a preferred embodiment of this utility model, a simple mouth-opening exercise device capable of measuring tooth pitch, the angular movable structure between the lower tooth support plate and the lower operating pressure plate includes an angle adjustment plate. The angle adjustment plate is hinged to the right side surface of the lower tooth support plate, and the inner wall of the lower operating pressure plate has a through groove that cooperates with the movement of the angle adjustment plate. The angle adjustment plate is slidably connected to the surface of the through groove.

[0014] As a preferred embodiment of this utility model of a simple mouth-opening exercise device that can measure tooth pitch, a limiting block is fixed at the top of the inner wall of the slot, and a sliding groove is provided on the surface of the angle adjustment plate to prevent it from dislodging from the slot, and the limiting block is slidably connected to the surface of the sliding groove.

[0015] As a preferred embodiment of this utility model, a simple mouth-opening exercise device capable of measuring tooth pitch, the lower operating pressure plate has two through slots on its surface for a mating arc-shaped scale plate to pass through.

[0016] As a preferred embodiment of this utility model of a simple mouth-opening exerciser capable of measuring tooth pitch, the surfaces of the upper and lower operating pressure plates are provided with multiple friction textures, and the surface of the stop block is provided with anti-slip textures.

[0017] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0018] This invention integrates stepless locking, real-time ranging, and adaptive angle compensation into a single small device, eliminating the shortcomings of traditional gear-type mouth-opening exercisers that can only be fixed in stages. This allows patients to brake instantly at any comfortable angle, significantly improving the personalization and comfort of rehabilitation training. The fluorescent indicator and transparent scale work together to enable rapid readings even in low-light environments, reducing the need for additional lighting and lowering the workload of medical staff. The combination of medical-grade polypropylene and antibacterial coating ensures that the structure maintains its structural strength and biosafety even after long-term and repeated disinfection, avoiding cross-infection and reducing hospital operating costs. Attached Figure Description

[0019] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a three-dimensional structural schematic diagram of the present invention from another perspective; Figure 3 This is a cross-sectional structural diagram of the present invention; Figure 4 This is a partial structural schematic diagram of the present invention; Figure 5 This utility model Figure 3 A magnified structural diagram at point A in the diagram.

[0020] In the diagram: 1. Upper toothed plate; 2. Lower toothed plate; 3. Upper operating pressure plate; 4. Lower operating pressure plate; 5. Lower extension plate; 6. Mounting shaft; 7. Upper extension plate; 8. Torsion spring; 9. Arc-shaped scale plate; 10. Indicator plate; 11. Ball joint seat; 12. Connecting ball joint; 13. Lead screw; 14. Stop block; 15. Movable groove; 16. Angle adjustment plate; 17. Through groove; 18. Slide groove; 19. Limiting block; 20. Friction texture. Detailed Implementation

[0021] Please see Figures 1-5 A simple mouth-opening exercise device for measuring tooth pitch includes an upper dental tray 1 and a lower dental tray 2. An upper operating pressure plate 3 is fixed to the right side of the upper dental tray 1, and a lower operating pressure plate 4 is provided on the right side of the lower dental tray 2. An angle-moving structure is provided between the lower dental tray 2 and the lower operating pressure plate 4. Two lower extension plates 5 are fixed to the top of the lower operating pressure plate 4, and a mounting shaft 6 is fixed between the two lower extension plates 5. Two upper extension plates 7 are fixed to the bottom of the upper operating pressure plate 3. The upper extension plates 7 are rotatably connected to the surface of the mounting shaft 6. A torsion spring 8 is installed on the surface of the mounting shaft 6. A measuring structure is provided on the surface of the upper operating pressure plate 3, and a locking structure is provided at the bottom of the upper operating pressure plate 3.

[0022] After the upper dental tray 1 and lower dental tray 2 are placed into the patient's mouth, the mounting shaft 6 is rotated by squeezing the upper operating plate 3 and lower operating plate 4. The torsion spring 8 stores force and generates a reverse restoring force, and the upper extension plate 7 and lower extension plate 5 rotate relative to each other around the mounting shaft 6, thereby passively opening the upper and lower jaws. The measuring structure indicates the current incisor spacing in real time, and the locking structure can be fixed at any angle instantly, achieving stepless stopping. This combination structure makes the mouth opening size continuously adjustable, avoiding the jumping sensation of traditional gear-type openings, reducing patient pain and fear, improving rehabilitation efficiency, and can be operated with one hand, significantly simplifying the clinical and home use process.

[0023] Furthermore, the measuring structure on the surface of the upper operating plate 3 includes an arc-shaped scale plate 9, which is fixedly connected to the front and rear sides of the surface of the upper operating plate 3, and an indicator plate 10 for use with the arc-shaped scale plate 9 is fixed on the surface of the lower extension plate 5.

[0024] When the upper operating plate 3 and the lower operating plate 4 rotate relative to each other, the indicator plate 10 fixed on the lower extension plate 5 slides along the arc-shaped scale plate 9. The arc-shaped scale plate 9 moves synchronously with the upper operating plate 3, and the two generate relative displacement. The scale instantly displays the incisor separation distance. Medical staff or patients can directly read the value visually without additional tools, reducing operation interruptions. The radius of the arc of the arc-shaped scale plate 9 is concentric with the axis of rotation, ensuring linear and accurate readings, improving measurement reliability, and reducing errors caused by parallax, which facilitates long-term tracking of rehabilitation progress.

[0025] Furthermore, the bottom locking structure of the upper operating pressure plate 3 includes a ball head seat 11, which is fixedly connected to the bottom of the upper operating pressure plate 3. A connecting ball head 12 is slidably connected to the inner wall of the ball head seat 11, and a lead screw 13 is fixed to the bottom of the connecting ball head 12. The surface of the lower operating pressure plate 4 is provided with a movable groove 15 through which the lead screw 13 passes. A stop block 14 is threadedly connected to the surface of the lead screw 13, and the stop block 14 is located below the lower operating pressure plate 4.

[0026] When a specific opening angle needs to be maintained, the rotating stop 14 causes axial displacement of the threaded pair between the lead screw 13 and the stop 14. The upper end face of the stop 14 presses against the bottom surface of the lower operating pressure plate 4 to form a friction lock. The ball joint structure of the ball head seat 11 and the ball joint connecting the ball head 12 allows the lead screw 13 to be finely adjusted in three-dimensional space to avoid jamming. This locking method can brake instantly at any position, eliminating the defects of traditional pin hole type segmentation, reducing secondary pain for patients, while also having a compact structure, fewer parts, convenient cleaning and disinfection, and reducing the risk of cross-infection.

[0027] Furthermore, the curved scale plate 9 is made of acrylic material.

[0028] The curved scale plate 9 is made of acrylic material, which is dimensionally stable and highly transparent after molding, allowing light to pass through for easy observation of the scale. The acrylic surface has high hardness, is resistant to repeated wiping and disinfection, is not prone to scratches, and maintains clear readings for a long time. Its light weight reduces the overall load on the device and the burden on the patient's mouth. At the same time, the material cost is low, it is easy to mass-produce, and it is economical, making it suitable for both disposable and reusable business models.

[0029] Furthermore, the surface of the indicator panel 10 is provided with a fluorescent coating.

[0030] The indicator panel 10 is coated with a fluorescent coating, which allows it to emit light in low-light conditions in the examination room or at night at home. The scale and pointer form a high contrast, making the readings clear. The fluorescent material does not contain any radioactive elements and is safe and harmless. The light-emitting function reduces the need for additional lighting, making it easier for patients to complete training independently and improving compliance. At the same time, it helps medical staff to quickly confirm the mouth opening range even after the operating lights are turned off, improving the efficiency of night patrols.

[0031] Furthermore, both the upper dental tray 1 and the lower dental tray 2 are made of medical-grade polypropylene and have an antibacterial coating on their surfaces.

[0032] The upper dental tray 1 and lower dental tray 2 are made of medical-grade polypropylene, which combines toughness and rigidity, resists bending and bite force; the surface antibacterial coating inhibits bacterial adhesion, reducing the probability of oral ulcers and infection; the material has good biocompatibility, can be sterilized by high-temperature steam or chemical immersion, and maintains stable performance even after repeated use; the overall weight is lightweight, and it is not easy to get tired even after wearing it for a long time, improving patient comfort and reducing the risk of material allergies.

[0033] Furthermore, the angle adjustment structure between the lower dental tray 2 and the lower operating pressure plate 4 includes an angle adjustment plate 16, which is hinged to the right side surface of the lower dental tray 2. The inner wall of the lower operating pressure plate 4 is provided with a through groove 17 that moves in coordination with the angle adjustment plate 16, and the angle adjustment plate 16 is slidably connected to the surface of the through groove 17.

[0034] When there is a large difference in the curvature of the patient's dental arch, the lower dental tray 2 can provide additional angle compensation relative to the lower operating pressure plate 4 through the sliding hinge relationship between the angle adjustment plate 16 and the groove 17, ensuring that the tray fits the teeth. This structure expands a single rotating pair into a compound kinematic chain, disperses local pressure, and avoids gingival compression damage. At the same time, the manufacturing tolerance is absorbed by the angle adjustment plate 16, reducing the assembly precision requirements and improving the yield rate.

[0035] Furthermore, a limiting block 19 is fixed to the top of the inner wall of the through groove 17, and a sliding groove 18 is provided on the surface of the angle adjustment plate 16 to prevent it from dislodging from the through groove 17. The limiting block 19 is slidably connected to the surface of the sliding groove 18.

[0036] The limiting block 19 forms a physical stop after being embedded in the slide groove 18, preventing the angle adjustment plate 16 from coming out of the through groove 17 at the extreme position and ensuring safe movement. The length of the slide groove 18 determines the compensation angle range, providing sufficient freedom while avoiding excessive rotation that could lead to mechanism failure. This limiting structure is simple and reliable, without springs or screws, reducing failure points, extending service life, and significantly reducing maintenance costs.

[0037] Furthermore, the surface of the lower operating pressure plate 4 has two through slots 17 through which the matching arc-shaped scale plate 9 passes.

[0038] The slot 17 provides clearance for the arc-shaped scale plate 9. When the upper and lower pressure plates rotate relative to each other, the arc-shaped scale plate 9 passes through the slot 17 without being blocked, ensuring that the scale is visible throughout.

[0039] Furthermore, the surfaces of the upper operating pressure plate 3 and the lower operating pressure plate 4 are provided with multiple friction textures 20, and the surface of the stop block 14 is provided with anti-slip textures.

[0040] Friction texture 20 is distributed on the outer surface of the upper operating plate 3 and the lower operating plate 4 to increase the friction between the fingers and the plate surface and prevent slipping in wet environments; the anti-slip texture on the surface of the stop 14 ensures that the rotational torque is effectively transmitted and avoids locking failure due to hand slippage; this dual anti-slip solution improves the reliability of single-handed operation and reduces the risk of treatment interruption and contamination caused by tools falling.

[0041] Working principle: During use, the sterilized upper dental tray 1 and lower dental tray 2 are first attached to the patient's upper and lower incisors respectively. The patient or medical staff holds the upper operating plate 3 and lower operating plate 4 with one hand, and by squeezing, the two rotate relative to each other around the mounting axis 6. The torsion spring 8 is compressed and stores energy, and the upper extension plate 7 and lower extension plate 5 form a kinematic pair. At the same time, the angle adjustment plate 16 slides in the groove 17, and the limiting block 19 guides in the slide groove 18 to ensure that the lower dental tray 2 can adapt to the curvature of the patient's dental arch. During the rotation, the indicator plate 10 moves along the arc-shaped scale. The plate 9 slides, displaying the incisor spacing in real time; when the required opening width is reached, the stop block 14 is tightened, and the threaded pair between the lead screw 13 and the stop block 14 generates axial displacement, causing the top surface of the stop block 14 to rub and lock against the bottom surface of the lower operating pressure plate 4. The ball joint structure of the ball head seat 11 and the ball head 12 allows for fine-tuning of the angle to avoid jamming; after training, the stop block 14 is loosened in the opposite direction, the torsion spring 8 releases energy, and the upper and lower dental trays automatically reset; the entire process requires no external tools, solving the problems of existing technologies being unable to finely adjust, unable to measure the incisor distance in real time, and cumbersome operation.

[0042] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A simple mouth opening exerciser capable of measuring the tooth span, characterized by: The device includes an upper dental tray (1) and a lower dental tray (2). An upper operating pressure plate (3) is fixed on the right side of the upper dental tray (1), and a lower operating pressure plate (4) is provided on the right side of the lower dental tray (2). An angle movable structure is provided between the lower dental tray (2) and the lower operating pressure plate (4). Two lower extension plates (5) are fixed on the top of the lower operating pressure plate (4), and an installation shaft (6) is fixed between the two lower extension plates (5). Two upper extension plates (7) are fixed on the bottom of the upper operating pressure plate (3). The upper extension plates (7) are rotatably connected to the surface of the installation shaft (6). A torsion spring (8) is installed on the surface of the installation shaft (6). A measuring structure is provided on the surface of the upper operating pressure plate (3), and a locking structure is provided at the bottom of the upper operating pressure plate (3). The bottom locking structure of the upper operating pressure plate (3) includes a ball head seat (11), which is fixedly connected to the bottom of the upper operating pressure plate (3). A connecting ball head (12) is slidably connected to the inner wall of the ball head seat (11). A lead screw (13) is fixed to the bottom of the connecting ball head (12). The surface of the lower operating pressure plate (4) is provided with a movable groove (15) through which the lead screw (13) passes. A stop block (14) is threadedly connected to the surface of the lead screw (13). The stop block (14) is located below the lower operating pressure plate (4).

2. The simple mouth opening exerciser capable of measuring the tooth distance according to claim 1, characterized in that: The upper operating plate (3) surface measurement structure includes an arc-shaped scale plate (9), which is fixedly connected to the front and rear sides of the upper operating plate (3) surface. The lower extension plate (5) surface is fixed with an indicator plate (10) used in conjunction with the arc-shaped scale plate (9).

3. The simple mouth opening exerciser capable of measuring the tooth distance according to claim 2, characterized in that: The arc-shaped scale plate (9) is made of acrylic material.

4. The simple mouth opening exerciser capable of measuring the tooth distance according to claim 2, characterized in that: The indicator plate (10) has a fluorescent coating on its surface.

5. The simple mouth opening exerciser capable of measuring the tooth distance according to claim 1, characterized in that: Both the upper dental tray (1) and the lower dental tray (2) are made of medical-grade polypropylene and have an antibacterial coating on their surfaces.

6. The simple mouth opening exerciser capable of measuring the tooth distance according to claim 1, characterized in that: The angle adjustment structure between the lower dental tray (2) and the lower operating pressure plate (4) includes an angle adjustment plate (16). The angle adjustment plate (16) is hinged to the right side surface of the lower dental tray (2). The inner wall of the lower operating pressure plate (4) is provided with a through groove (17) that cooperates with the angle adjustment plate (16). The angle adjustment plate (16) and the surface of the through groove (17) are slidably connected.

7. The simple mouth opening exerciser capable of measuring the tooth distance according to claim 6, characterized in that: A limiting block (19) is fixed at the top of the inner wall of the through groove (17), and a sliding groove (18) is provided on the surface of the angle adjustment plate (16) to prevent it from falling out of the through groove (17). The limiting block (19) is slidably connected to the surface of the sliding groove (18).

8. The simple mouth opening exerciser capable of measuring the tooth distance according to claim 1, characterized in that: The lower operating pressure plate (4) has two through slots (17) on its surface for the passage of the matching arc-shaped scale plate (9).

9. The simple mouth opening exerciser capable of measuring the tooth distance according to claim 1, characterized in that: The upper operating pressure plate (3) and the lower operating pressure plate (4) are both provided with multiple friction textures (20), and the surface of the stop block (14) is provided with anti-slip textures.

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