Oral cavity opening device clinically applicable to department of stomatology

Abstract

The invention discloses an oral cavity opening device clinically applicable to the stomatology department, and relates to the technical field of medical instruments, the oral cavity opening device comprises an upper tooth sleeve and a lower tooth sleeve which are used during clinical examination of the stomatology department, a plurality of telescopic rods are connected between the upper tooth sleeve and the lower tooth sleeve, and the upper tooth sleeve is provided with a tooth sleeve unfolding assembly used for opening the oral cavity; the upper gear sleeve and the lower gear sleeve are each internally provided with a gear sleeve extension assembly, and one side of the upper gear sleeve is further provided with a gear sleeve bending adjusting assembly and a planet wheel rotary knob used for adjusting. The planet wheel knob is rotated to drive the screw and the telescopic worm to rotate, the gear shaft and the belt wheel structure drive the driven worm to rotate, the upper gear sleeve and the lower gear sleeve are made to be unfolded and extended, the sliding block on the screw drives the push rods on the two sides, and the bending degree of the upper gear sleeve and the bending degree of the lower gear sleeve are adjusted. The whole tooth structure of a patient in the department of stomatology is fitted; the device has the advantages of being high in adjusting precision, wide in application range, good in safety and convenient to use.

Description

Technical Field

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

[0002] The oral cavity is the starting part of the digestive tract. It contains teeth, tongue and other organs. The front wall of the oral cavity is the lips, the side walls are the cheeks, the roof is the palate, and the floor of the oral cavity is the mucosa and muscle structures. The oral cavity is divided into the oral vestibule in the anterior and lateral part and the proper oral cavity in the posterior and medial part by the upper and lower dental arches. When the upper and lower teeth are occluded, the oral vestibule and the proper oral cavity can be connected through the gap behind the third molar. When dentists examine the inside of the patient's mouth, some patients are unable to open their mouths on their own due to their own physical constitution or diseases, which affects the medical staff's oral examination. Existing devices that assist in opening the oral cavity have certain limitations when used.

[0003] The existing oral opening device, such as an oral auxiliary support device for gastroscopy provided by publication number CN118436299A, comprises an upper support plate and a lower support plate, wherein the upper support plate and the lower support plate have a placement groove on their opposite sides, and the upper support plate and the lower support plate have an elastic connection mechanism connected to their adjacent sides. The application adopts an upper guide rod, a lower guide rod, a limit connection column, a movable groove, a first elastic component, an upper support plate and a lower support plate, and the upper guide rod and the lower guide rod are inclined, and the inclined surface can be used to assist the patient's upper and lower teeth to open, and the teeth can enter the placement groove smoothly; however, the upper support plate and the lower support plate structure of the application are an integrated design, so they are not customized for the internal structure and size of the oral cavity of different people, resulting in a reduced scope of application of the device; at the same time, the movable guide mechanism of the application is located inside the oral cavity, and when adjusting the interval between the upper support plate and the lower support plate, the connection of the movable guide mechanism may cause damage to the inside of the oral cavity, and the safety is poor. Summary of the invention

[0004] In view of the above-mentioned problems, the present invention aims to provide an oral opening device suitable for clinical dentistry, by designing a tooth sleeve deployment component, by adjusting the planetary wheel knob, the deployment rack is driven to push the upper tooth sleeve and the lower tooth sleeve to deploy, so as to deploy the patient's mouth, by designing a tooth sleeve extension component, by adjusting the planetary wheel knob, the extension tooth sleeve located in the upper tooth sleeve and the lower tooth sleeve is driven to extend to both ends, by designing a tooth sleeve bending adjustment component, by adjusting the planetary wheel knob, while driving the tongue depressor downward, the push rods on both sides are driven to push the upper tooth sleeve and the lower tooth sleeve for bending adjustment, so as to adjust according to the different tooth shapes of the patient, and the device has the advantages of high adjustment accuracy, wide application range, good safety and easy use.

[0005] The main idea of ​​the technical solution adopted in the present invention is: to design a tooth sleeve deployment component, to drive the telescopic worm to rotate through the planetary wheel knob, to drive the gear shafts on both sides through the rotation of the telescopic worm, and to drive the worms on both sides to rotate through the pulley structure, and to drive the deployment rack to push the upper tooth sleeve and the lower tooth sleeve to deploy, so as to deploy the patient's oral cavity; to design a tooth sleeve extension component, to drive the extension tooth sleeves located in the upper tooth sleeve and the lower tooth sleeve to extend to both sides through the extension gears on the worms on both sides; to design a tooth sleeve bending adjustment component, to drive the screw to rotate through the planetary wheel knob, and the slider mounted on the screw moves laterally under the limiting action of the tongue depressor connecting rod, thereby pressing the tongue depressor downward, and to push the upper tooth sleeve to bend through the push rods on both sides, and to drive the lower tooth sleeve to bend synchronously, and to adjust according to the tooth shape of different patients through the joint action of the tooth sleeve extension component and the tooth sleeve bending adjustment component.

[0006] In order to achieve the above object, the technical solution adopted by the present invention is as follows: An oral opening device suitable for clinical stomatology comprises an upper tooth sleeve and a lower tooth sleeve used in clinical stomatology examinations, a plurality of telescopic rods are connected between the upper tooth sleeve and the lower tooth sleeve, a tooth sleeve deployment component for opening the oral cavity is provided on the upper tooth sleeve, a tooth sleeve extension component is provided in both the upper tooth sleeve and the lower tooth sleeve, and a tooth sleeve bending adjustment component is also provided on one side of the upper tooth sleeve.

[0007] The gear sleeve deployment assembly includes a telescopic worm rotatably arranged on the upper gear sleeve, the telescopic worm is meshedly connected with the transmission gear shafts on both sides of the upper gear sleeve, the transmission gear shafts on both sides are respectively rotatably connected with the driven worms at both ends of the upper gear sleeve through a pulley structure, the bottom of the driven worm is meshedly connected with a rack push rod slidably arranged in the upper gear sleeve, and the bottom of the rack push rod is fixedly connected to the top of the lower gear sleeve; when the telescopic worm rotates, it can drive the transmission gear shafts on both sides to rotate, and drive the driven worm to rotate through the pulley structure, so that the rack push rod slides to the bottom of the upper gear sleeve, and the upper and lower gear sleeves are stretched open, so that the patient's mouth is opened during a dental clinical examination.

[0008] The tooth sleeve extension assembly includes an extension tooth sleeve slidably set in the upper tooth sleeve and the lower tooth sleeve, and the extension tooth sleeve in the upper tooth sleeve is provided with a rack, which is meshed with a driven gear fixed to the driven worm, and a plurality of telescopic shafts are connected between the extension tooth sleeves in the upper tooth sleeve and the lower tooth sleeve; when the driven worm rotates, the rotation of the driven gear can drive the extension tooth sleeve in the upper tooth sleeve to extend to both ends, and the extension tooth sleeve in the lower tooth sleeve can be driven to extend synchronously through the telescopic shaft, so as to provide better support for the patient's teeth during oral examination.

[0009] Based on the above technical solution, further, one end of the rack close to the middle of the upper gear sleeve is also provided with a limit plate for preventing the extended gear sleeve from detaching from the upper gear sleeve; when the extended gear sleeve is extended to both ends, the limit plate can clamp the driven gear column on the driven worm to prevent the extended gear sleeve from over-extending from the upper gear sleeve or the lower gear sleeve.

[0010] The tooth sleeve bending adjustment component includes a screw rod that penetrates into the upper tooth sleeve and is sleeved on the telescopic worm, the screw rod is meshingly connected with a slider, push rods are fixed on both sides of the slider, a limit rod is rotatably provided on the slider, and the end of the limit rod away from the slider is slidably provided in a through hole near the bottom of the upper tooth sleeve; when the screw rod rotates, the slider can slide horizontally under the limiting action of the limit rod, and the upper tooth sleeve is pushed to bend by the push rod, and the lower tooth sleeve is driven to bend synchronously by the telescopic shaft, so that the upper tooth sleeve and the lower tooth sleeve can be adjusted according to the overall structure of the teeth of different patients.

[0011] A tongue depressor is rotatably provided on the side of the upper gear sleeve away from the screw rod, and a tongue depressor connecting rod is rotatably connected to the bottom of the tongue depressor, and one end of the tongue depressor connecting rod away from the tongue depressor is rotatably connected to the limiting rod; when the slider slides, it can drive the limiting rod and the tongue depressor connecting rod to rotate, and drive the tongue depressor to rotate downward, depressing the patient's tongue so that the doctor can examine the inside of the patient's mouth.

[0012] Based on the above technical solution, it further includes a planetary gear knob, which includes a knob housing, a gear ring is fixed inside the knob housing, a plurality of planetary gears are meshedly connected to the gear ring, and the plurality of planetary gears are meshedly connected to the sun gear located in the middle, and a planetary gear rotating plate is also provided on one side of the knob housing, and a plurality of planetary gears are rotatably fixed on the planetary gear rotating plate.

[0013] Based on the above technical solution, further, the middle part of the sun gear is fixedly connected to the telescopic worm in the gear sleeve expansion assembly, and the middle part of the knob housing is detachably connected to the screw in the gear sleeve bending adjustment assembly; through the deceleration effect of the planetary gear structure, the gear sleeve expansion assembly and the gear sleeve extension assembly can be precisely adjusted synchronously, and the gear sleeve bending adjustment assembly can be adjusted. After the gear sleeve curvature adjustment is completed, the knob housing and the screw can be separated, so that only the gear sleeve expansion assembly and the gear sleeve extension assembly can be adjusted.

[0014] A method for using a mouth opening device suitable for clinical use in stomatology comprises the following steps: S1. When conducting a clinical examination in the oral department, first place the entire device into the patient's mouth, so that the upper tooth sleeve and the lower tooth sleeve fit the patient's front teeth respectively; S2. Turn the planetary wheel knob to synchronously drive the tooth sleeve expansion component, the tooth sleeve extension component and the tooth sleeve bending adjustment component to adjust. Due to the inherent characteristics of the planetary wheel structure, the curvature of the upper tooth sleeve and the lower tooth sleeve is first adjusted to a degree that matches the patient's teeth, and the tongue depressor presses the patient's tongue downward; S3. Separate the planetary wheel knob from the screw, and drive the telescopic worm to rotate by turning the planetary wheel knob to synchronously drive the gear sleeve deployment component and the gear sleeve extension component for precise adjustment. While opening the patient's mouth through the upper and lower gear sleeves, the support effect on the patient's mouth is enhanced by extending the gear sleeve.

[0015] The beneficial effects of the present invention are: 1. By designing a tooth sleeve deployment component, the upper tooth sleeve and the lower tooth sleeve are deployed to open the patient's mouth as a whole, which is convenient for dentists to perform oral examinations. The tooth sleeve extension component and the tooth sleeve bending adjustment component are designed. By adjusting the upper tooth sleeve and the lower tooth sleeve to a shape close to the overall shape of the patient's teeth, and increasing the overall length of the upper tooth sleeve and the lower tooth sleeve by extending the extended tooth sleeves to both ends, a better support effect is provided for the patient's teeth, so that the device can be dynamically adjusted according to the oral conditions of different patients, thereby improving the scope of application of the present invention.

[0016] 2. By designing a planetary wheel knob, the screw is driven to rotate through the knob housing, and the push rod is driven by the slider to adjust the curvature of the upper and lower gear sleeves. The planetary wheel knob can be removed from the screw, and the telescopic worm is driven to rotate through the sun gear located in the middle. Therefore, the gear sleeve expansion assembly and the gear sleeve extension assembly can be precisely adjusted through the deceleration characteristics of the planetary wheel itself, so that the present invention has the advantage of high adjustment accuracy.

[0017] 3. By designing a planetary wheel knob, the tooth sleeve deployment component, the tooth sleeve extension component and the tooth sleeve bending adjustment component can be adjusted by rotation adjustment. At the same time, the tongue depressor is driven downward by the slider to press down the patient's tongue, which is convenient for doctors to perform oral examinations, making the use of the present invention more convenient.

[0018] 4. By arranging the screw and telescopic worm for driving the upper and lower gear sleeves on the outside of the gear sleeves, when the upper and lower gear sleeves are located in the patient's mouth, the upper and lower gear sleeves are adjusted by the screw and telescopic worm located outside the mouth. At the same time, the telescopic rod and telescopic shaft located inside the mouth are located on the inner side of the overall structure of the upper and lower gear sleeves, which can avoid contact with the inside of the patient's mouth, thereby avoiding damage to the inside of the patient's mouth, thereby improving the overall safety of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention; Figure 2 It is a front view of the present invention; Figure 3 It is a rear view of the present invention; Figure 4 is a side view of the present invention; Figure 5 It is a schematic diagram of the three-dimensional structure of the present invention from a bottom viewing angle; Figure 6 for Figure 5 A local detail view at point A; Figure 7 This is a schematic diagram of the three-dimensional structure of the present invention after removing the upper gear sleeve; Figure 8 for Figure 7 A local detail view at B; Fig. 9 for Figure 7 A local detail view at C; Fig.10 for Figure 7 A local detail view at D; Fig.11 Schematic diagram of the three-dimensional structure of the upper rack; Fig.12 for Fig.11 A local detail view at E; Fig.13 for Fig.11 A local detail view at F; Fig.14 The cross-sectional view of the planetary wheel knob connecting screw and telescopic worm; Fig.15 for Fig.14 Local detail at G.

[0020] Among them: 1. Upper gear sleeve; 101. Telescopic rod installation slot; 102. Rack push rod limiting hole; 2. Lower gear sleeve; 3. Gear sleeve expansion assembly; 301. Telescopic worm; 302. Transmission gear shaft; 303. Pulley structure; 3031. Pulley shaft; 3032. Transmission pulley; 3033. Transmission belt; 3034. Transmission belt fastening wheel; 304. Driven worm; 305. Rack push rod; 306. Rack push rod fixing ring; 4. Gear sleeve extension assembly; 401. Extension gear sleeve; 402, rack; 403, driven gear; 404, telescopic shaft; 405, limit plate; 5, gear sleeve bending adjustment assembly; 501, screw; 502, slider; 503, push rod; 6, tongue depressor; 601, tongue depressor connecting rod; 7, planetary gear knob; 701, knob housing; 702, gear ring; 703, planetary gear; 704, sun gear; 705, planetary gear rotating plate; 8, telescopic rod; 9, limit rod; 10, mounting seat; 11, extension gear sleeve guide groove. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations.

[0022] The inventor's research found that when dentists examine the inside of patients' mouths, some patients are unable to open their mouths on their own due to their physical constitution or diseases, which in turn affects the medical staff's oral examination; existing devices that assist in opening the mouth have certain limitations when used; for example, existing devices cannot be flexibly adjusted according to the overall shape of the mouth of different patients, and the movable mechanism may cause damage to the inside of the mouth, resulting in a reduced scope of application and reduced safety.

[0023] Based on the above findings, the present application proposes an oral opening device suitable for clinical use in dentistry, designs a tooth sleeve expansion component, drives the telescopic worm to rotate through the planetary wheel knob, drives the gear shafts on both sides to rotate, and drives the worms on both sides to rotate through the pulley structure, thereby driving the expansion rack to push the upper tooth sleeve and the lower tooth sleeve to expand, and expand the patient's mouth; designs a tooth sleeve extension component, drives the extension tooth sleeves located in the upper tooth sleeve and the lower tooth sleeve to extend to both sides through the extension gears on the worms on both sides; designs a tooth sleeve bending adjustment component, drives the screw to rotate through the planetary wheel knob, and the slider mounted on the screw moves laterally along the screw under the limiting action of the tongue depressor connecting rod, thereby pressing the tongue depressor downward, and pushing the upper tooth sleeve to bend through the push rods on both sides, and driving the lower tooth sleeve to bend synchronously, and through the joint action of the tooth sleeve extension component and the tooth sleeve bending adjustment component, it can be adjusted according to the tooth shape of different patients; it has the advantages of high adjustment accuracy, wide range of application, good safety and easy use.

[0024] See also Figure 1-Figure 5 The present application discloses an oral opening device applicable to clinical stomatology, comprising an upper tooth sleeve 1 and a lower tooth sleeve 2 used in clinical stomatology examinations. The upper tooth sleeve 1 and the lower tooth sleeve 2 are made of a medical thermoplastic elastomer, which has good elasticity. The overall shape of the upper tooth sleeve 1 and the lower tooth sleeve 2 is close to the overall shape of the front teeth area in the front of the oral cavity of the general population. At the same time, the cross-sectional shape of the upper tooth sleeve 1 and the lower tooth sleeve 2 is a concave shape, and a cavity is opened inside the upper tooth sleeve 1 and the lower tooth sleeve 2. At the same time, the upper tooth sleeve 1 and the lower tooth sleeve 2 are connected by a plurality of telescopic rods 8 evenly distributed at both ends. The movable ends of the telescopic rods 8 are respectively fixedly connected to the bottom of the upper tooth sleeve 1 and the top of the lower tooth sleeve 2 by bonding or opening a telescopic rod mounting groove 101 for clamping, so that the telescopic rod 8 can be adjusted in length according to the relative distance between the upper tooth sleeve 1 and the lower tooth sleeve 2 while constraining the relative position of the upper tooth sleeve 1 and the lower tooth sleeve 2 to a certain extent. At the same time, the material of the telescopic rod 8 can be selected from plastic or light metal with a certain elasticity. When the oral cavity of the oral patient is opened by the upper tooth sleeve 1 and the lower tooth sleeve 2, the telescopic rod 8 can undergo a certain elastic deformation according to the degree of opening of the oral cavity without plastic deformation, so as to fit the degree of opening of the patient's oral cavity.

[0025] See also Figure 7-Figure 10 The upper tooth sleeve 1 is provided with a tooth sleeve expansion component 3 for opening the oral cavity, and the tooth sleeve expansion component 3 includes a telescopic worm 301 rotatably arranged on the upper tooth sleeve 1, and one end of the telescopic worm 301 with spiral teeth penetrates into the interior of the upper tooth sleeve 1, and the other end located outside the upper tooth sleeve 1 is a telescopic structure. The telescopic worm 301 is located at one end inside the upper tooth sleeve 1, and is meshed and connected with the transmission gear shafts 302 vertically arranged on both sides of the upper tooth sleeve 1. When the telescopic worm 301 rotates, it can drive the transmission gear shafts 302 on both sides to rotate synchronously; The transmission gear shafts 302 on both sides are rotatably connected to the driven worms 304 vertically arranged at both ends of the upper gear sleeve 1 through the pulley structure 303. Specifically, the pulley structure 303 includes a plurality of pulley shafts 3031 vertically arranged inside the upper gear sleeve 1. In the embodiment of the present invention, the number of the pulley shafts 3031 is two on each side. A transmission pulley 3032 is fixed at a position near the bottom of the transmission gear shaft 302. At the same time, a transmission pulley 3032 is also fixed on the driven worm 304 at both ends. A transmission belt fastening wheel 3034 is fixed on both pulley shafts 3031. The transmission pulley 3032 on the transmission gear shaft 302 and the transmission pulley 3032 fixed on the driven worm 304 are linked by the sleeve transmission belt 3033. At the same time, a pulley shaft 3031 close to the transmission gear shaft 302 is located between the transmission belt 3033 and the extended gear sleeve 401, and the side of the transmission belt 3033 close to the extended gear sleeve 401 is squeezed toward the side away from the extended gear sleeve 401. At the same time, a pulley shaft close to the driven worm 304 is located between the two belts formed by the transmission belt 3033, and the side of the transmission belt 3033 away from the extended gear sleeve 401 is further squeezed toward the side away from the extended gear sleeve 401, so that the transmission belt 3033 and the extended gear sleeve 401 are connected. The extended tooth sleeve 401 is isolated so that the transmission belt 3033 will not rub against the extended tooth sleeve 401 during operation; in addition, since the transmission belt 3033 has a certain elasticity, the extrusion effect of the transmission belt tightening wheel 3034 can also improve the overall stability of the transmission belt 3033, which is beneficial to improving the operating stability of the pulley structure 303 and ensuring the precise adjustment of the tooth sleeve deployment component 3; in some implementation schemes, it is also possible to choose to increase the number of pulley shafts 3031 and transmission belt tightening wheels 3034, so as to improve the tightening effect of the transmission belt tightening wheel 3034 on the transmission belt 3033 and the isolation effect between the transmission belt 3033 and the extended tooth sleeve 401.

[0026] The bottom of the driven worm 304 is provided with helical teeth, and the end is meshed and connected with a rack push rod 305 vertically slidably arranged in the upper gear sleeve 1. Specifically, it is located inside the upper gear sleeve 1 and is vertically fixed with a plurality of rack push rod fixing rings 306 with a cross-sectional shape close to a semicircular ring. The rack push rod 305 is a slender cylindrical structure as a whole, and a rack structure is fixed on its surface. The side where the rack structure is fixed is meshed with the helical teeth on the driven worm 304. When the driven worm 304 rotates, it can be Through the meshing action of the helical teeth and the rack structure, the rack push rod 305 slides downward or upward along the upper gear sleeve 1. A rack push rod limiting hole 102 for the rack push rod 305 to slide is provided at the bottom of the upper gear sleeve 1. The rack push rod limiting hole 102 is close to the overall cross-sectional shape of the rack push rod 305. Therefore, the rack push rod 305 is not easy to rotate when sliding, that is, the rack structure of the rack push rod 305 will not be disengaged from the helical teeth on the driven worm 304, so as to ensure the stability of the structure during operation. In addition, in some embodiments, the entire portion of the rack push rod 305 may be configured as a slender rectangular parallelepiped structure, and the rack push rod fixing ring 306 may be configured as a semi-rectangular ring structure in cross-section, so as to further reduce the possibility of the rack push rod 305 rotating when sliding. The bottom of the rack push rod 305 is fixedly connected to the top of the lower gear sleeve 2. In some implementation schemes, the bottom of the rack push rod 305 can be connected to the top of the lower gear sleeve 2 by gluing or clamping. Then, when the rack push rods 305 at both ends slide downward along the upper gear sleeve 1, the lower gear sleeve 2 can be pushed to move downward. In an embodiment of the present invention, the position of the rack push rod 305 is close to the side of the upper gear sleeve 1 connected to the telescopic worm 301. Then, when the rack push rod 305 pushes the lower gear sleeve 2, the upper gear sleeve 1 and the lower gear sleeve 2 can be expanded at a certain angle, thereby fitting the open state of the human oral cavity to ensure that the patient has a certain degree of comfort when the mouth is open.

[0027] See also Figure 11-13 The upper gear sleeve 1 and the lower gear sleeve 2 are both provided with a gear sleeve extension component 4, and the gear sleeve extension component 4 includes an extension gear sleeve 401 slidably arranged in the upper gear sleeve 1 and the lower gear sleeve 2. Specifically, the extension gear sleeve 401 is arranged in the internal cavity of the upper gear sleeve 1 and the lower gear sleeve 2, and at a position that does not affect the various structures in the rack expansion component 3. The shape of the extension gear sleeve 401 is relatively close to the shape of the upper gear sleeve 1 or the lower gear sleeve 2. At the same time, the top surface and the bottom surface of the upper gear sleeve 1 and the lower gear sleeve 2 are The surface is provided with an extension sleeve guide groove 11 that matches the overall shape of the extension sleeve 401. The material of the extension sleeve 401 is the same as that of a medical thermoplastic elastomer. In some embodiments, the top and bottom of the upper sleeve 1 and the lower sleeve 2 are provided with grooves for limiting the extension sleeve 401 to prevent the extension sleeve 401 from sliding toward the side wall of the upper sleeve 1 or the lower sleeve 2 when the extension sleeve 401 is unfolded along the upper sleeve 1 or the lower sleeve 2, so as to ensure the extension accuracy of the extension sleeve 401. The extended tooth sleeve 401 in the upper tooth sleeve 1 is provided with a rack 402, and the rack 402 is meshedly connected with a driven gear 403 fixed to one end of the driven worm 304 near the top. When the driven worm 304 rotates, the extended tooth sleeve 401 provided with the rack 402 can be driven to slide out along the two ends of the upper tooth sleeve 1 through the rotation of the driven gear 403, so as to serve as a further extension of the upper tooth sleeve 1; A telescopic shaft 404 is fixedly connected between the extended tooth sleeves 401 in the upper tooth sleeve 1 and the lower tooth sleeve 2, specifically at the two outermost corners of the upper and lower extended tooth sleeves 401. When the extended tooth sleeve 401 in the upper tooth sleeve 1 slides and extends to both ends, the extended tooth sleeve 401 in the lower tooth sleeve 2 can be driven to extend synchronously through the telescopic shaft 404, and the structure of the telescopic shaft 404 is similar to the telescopic rod 8. The upper and lower extended tooth sleeves 401 can also be synchronously expanded with the expansion angles of the upper tooth sleeve 1 and the lower tooth sleeve 2. Through the tooth sleeve extension component 4, the overall support effect of the device on the opening of the oral cavity of oral patients can be improved.

[0028] A limit plate 405 is also provided on one end of the rack 402 near the middle of the upper gear sleeve 1 for preventing the extended gear sleeve 401 from detaching from the upper gear sleeve 1. When the extended gear sleeve 401 is extended, the limit plate 405 contacts the driven gear 403 on the driven worm 304 and clamps the driven gear 403 to lock the extended gear sleeve 401 as a whole relative to the upper gear sleeve 1 to prevent the extended gear sleeve 401 from being over-extended and thus falling off from the upper gear sleeve 1 or the lower gear sleeve 2.

[0029] A gear sleeve bending adjustment component 5 is also provided on one side of the upper gear sleeve 1. The gear sleeve bending adjustment component 5 includes a screw 501 that penetrates into the upper gear sleeve 1 and is sleeved on the telescopic worm 301. The screw 501 is a slender cylindrical structure with a cylindrical cavity in the middle. The cross-sectional size of the internal cavity matches the screw 501. A thread is provided on the outer surface of the screw 501, and a slider 502 is meshed and connected to the threaded section. Push rods 503 arranged obliquely are fixed on both sides of the slider 502. Figure 6 The slider 502, specifically the bottom of the slider 502, is fixed with a mounting seat 10, which is rotatably connected to a limiting rod 9, and the limiting rod 9 is slidably arranged in a through hole near the bottom of the upper tooth sleeve 1 at one end away from the slider 502. When the screw rod 501 rotates, the slider 502 is limited by the limiting rod 9, so that the slider 502 can slide laterally along the rod body of the screw rod 501. When the slider 502 slides, the push rods 503 on both sides can contact the two sides of the upper tooth sleeve 1 and push the upper tooth sleeve 1, so that the upper tooth sleeve 1 and the extended tooth sleeve 401 located in the upper tooth sleeve 1 are deformed to a certain extent on both sides synchronously. At the same time, the deformation of the upper tooth sleeve 1 can also drive the lower tooth sleeve 2 and the extended tooth sleeve 401 therein to deform synchronously through the telescopic rod 8 and the telescopic shaft 404, so as to fit the overall structure of the teeth of the oral patient, thereby improving the comfort of the patient during oral clinical examination; The tongue depressor 6 is rotatably provided on the side of the upper tooth sleeve 1 away from the screw rod 501 by means of a rotating shaft connection or the like. A mounting seat 10 is fixed at the bottom of the tongue depressor 6, and a tongue depressor connecting rod 601 is rotatably connected in the mounting seat 10. The end of the tongue depressor connecting rod 601 away from the tongue depressor 6 penetrates into the through hole at the bottom of the upper tooth sleeve 1 and is rotatably connected to the limiting rod 9. When the slider 502 slides, it can also push the limiting rod 9 to rotate vertically along the through hole at the bottom of the upper tooth sleeve 1 toward the bottom of the through hole, and drive the tongue depressor connecting rod 601 to rotate synchronously. The rotation of the tongue depressor connecting rod 601 can provide a downward pulling force for the tongue depressor 6, thereby driving the tongue depressor 6 to rotate, that is, the end of the tongue depressor 6 away from the upper tooth sleeve 1 rotates vertically in a downward direction, thereby pressing down the tongue of the oral patient so that the doctor can perform a clinical examination on the inside of the patient's mouth.

[0030] See also Fig.14 as well as Fig.15 A planetary wheel knob 7 is also provided at one end of the screw 501 and the telescopic worm 301 away from the upper gear sleeve 1. The planetary wheel knob 7 includes a knob housing 701. A gear ring 702 is fixed inside the knob housing 701. A plurality of planetary gears 703 are meshedly connected to the gear ring 702. In the embodiment of the present invention, the number of the planetary gears 703 is 3. Each of the planetary gears 703 is meshedly connected to the sun gear 704 located in the middle. A rotatable planetary wheel rotating plate 705 is provided inside the knob housing 701 and on one side away from the screw 501. Each planetary gear 703 is rotatably fixed to the planetary wheel rotating plate 705. In some embodiments, the knob housing 701 is a flat cylindrical housing with a circular through hole on one side. The cross-sectional diameter of the circular through hole may be the same as the cross-sectional diameter of the telescopic worm 301, or between the diameters of the telescopic worm 301 and the sun gear 704. The middle portion of the sun gear 704 is fixedly connected to the telescopic worm 301 in the gear sleeve deployment assembly 3, that is, the telescopic end of the telescopic worm 301 penetrates into the circular through hole of the knob housing 701 and is fixed to the sun gear 704. At the same time, the middle part of the knob housing 701, that is, the side of the knob housing 701 with a circular through hole, is detachably connected to the screw 501 in the gear sleeve bending adjustment assembly 5. In some embodiments, a plurality of clamping blocks can be optionally provided at the end of the screw 501 away from the upper gear sleeve 1, and a plurality of clamping grooves can be provided on the side of the knob housing 701 with a circular through hole to clamp the screw 501 to the knob housing 701. When the screw rod 501 is engaged with the knob housing 701, the screw rod 501 can be driven to rotate by rotating the knob housing 701, and the upper gear sleeve 1 and the lower gear sleeve 2 are bent and adjusted by the push rods 503 on both sides of the slider 502. At this time, the sun gear 704 drives the telescopic worm 301 to rotate at an angular velocity much smaller than the angular velocity of the screw rod 501. When the bending degree of the upper gear sleeve 1 and the lower gear sleeve 2 is adjusted, the knob housing 701 is separated from the screw rod 501. At this time, the telescopic worm 301 is retractable due to its own telescopic structure. Due to the structural characteristics, it can follow the planetary wheel knob 7 to extend and retract one end distance as a whole. At this time, by rotating the knob housing 701, only the telescopic worm 301 can be rotationally adjusted, and due to the planetary wheel structure inside the planetary wheel knob 7, the rotation angular velocity of the telescopic worm 301 is much smaller than the overall rotation angular velocity of the planetary wheel knob 7, so the tooth sleeve deployment component 3 and the tooth sleeve extension component 4 can be finely adjusted, that is, the dentist can finely adjust the patient's oral opening degree and the extension degree of the tooth sleeve to improve the patient's comfort.

[0031] A method for using a mouth opening device suitable for clinical use in stomatology comprises the following steps: S1. When conducting a clinical examination in the oral department, first place the entire device into the patient's mouth, so that the upper tooth sleeve 1 and the lower tooth sleeve 2 are respectively fitted with the patient's teeth in the front tooth area; S2, turning the planetary wheel knob 7, synchronously driving the tooth sleeve deployment component 3, the tooth sleeve extension component 4 and the tooth sleeve bending adjustment component 5 to adjust, due to the inherent characteristics of the planetary wheel structure, the curvature of the upper tooth sleeve 1 and the lower tooth sleeve 2 is first adjusted to a degree that matches the patient's teeth, and the tongue depressor is pressed down on the patient's tongue; S3. Separate the knob housing 701 of the planetary wheel knob 7 from the screw 501, and drive the telescopic worm 301 to rotate by rotating the planetary wheel knob 7, so as to synchronously drive the gear sleeve deployment component 3 and the gear sleeve extension component 4 for precise adjustment, and while opening the patient's mouth through the upper gear sleeve 1 and the lower gear sleeve 2, enhance the supporting effect on the patient's mouth by extending the gear sleeve 401.

[0032] Clinical application cases When a patient in the dental department undergoes a clinical examination, the patient sits on a chair, and the doctor first places the device of the present invention as a whole into the patient's mouth in a direction of fitting with the teeth, so that the upper tooth sleeve 1 and the lower tooth sleeve 2 fit with the upper and lower front teeth of the patient respectively, and places the planetary wheel knob 7, the screw 501 and the telescopic worm 301 for adjustment outside the oral cavity; First, when the knob housing 701 is connected to the screw rod 501, the planetary wheel knob 7 is rotated, and the slider 502 is moved by the rotation of the screw rod 501, and the upper tooth sleeve 1 and the lower tooth sleeve 2 are synchronously bent by the push rod 503, so that the upper tooth sleeve 1 and the lower tooth sleeve 2 are further fitted to the patient's front teeth area. At this time, the tongue depressor 6 presses the patient's tongue under the movement of the slider 502, and then the knob housing 701 is separated from the screw rod 501; Subsequently, the planetary wheel knob 7 is rotated to drive the transmission gear shaft 302 to rotate through the rotation of the telescopic worm 301, and the driven worm 304 is driven to rotate through the pulley structure. When the driven worm 304 rotates, it can synchronously drive the rack push rod 305 downward to push the lower gear sleeve 2 downward, and drive the upper gear sleeve 1 and the extended gear sleeve 401 in the lower gear sleeve 2 to slide outward, so that while the patient's mouth is opened, the extended gear sleeve 401 wraps the molar part on both sides of the patient's mouth, thereby enhancing the support effect on the patient's mouth, so that the doctor can perform a clinical oral examination on the patient.

[0033] The above shows and describes the basic principles, main features and advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments, and the above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. An oral opening device suitable for clinical stomatology, comprising an upper tooth sleeve (1) and a lower tooth sleeve (2) used in clinical stomatology examinations, characterized in that: A plurality of telescopic rods (8) are connected between the upper tooth sleeve (1) and the lower tooth sleeve (2); a tooth sleeve expansion component (3) for opening the oral cavity is provided on the upper tooth sleeve (1); a tooth sleeve extension component (4) is provided in both the upper tooth sleeve (1) and the lower tooth sleeve (2); and a tooth sleeve bending adjustment component (5) is also provided on one side of the upper tooth sleeve (1).

2. The oral opening device for clinical use in dentistry according to claim 1, characterized in that: The gear sleeve deployment assembly (3) comprises a telescopic worm (301), the telescopic worm (301) being meshedly connected with transmission gear shafts (302) on both sides of the upper gear sleeve (1), the transmission gear shafts (302) on both sides being rotationally connected with driven worms (304) at both ends respectively through pulley structures (303), the bottom of the driven worm (304) being meshedly connected with a rack push rod (305) slidably arranged in the upper gear sleeve (1), and the bottom of the rack push rod (305) being fixedly connected with the top of the lower gear sleeve (2).

3. The oral opening device for clinical use in dentistry according to claim 1, characterized in that: The tooth sleeve extension assembly (4) comprises an extension tooth sleeve (401) slidably arranged in the upper tooth sleeve (1) and the lower tooth sleeve (2); a rack (402) is provided on the extension tooth sleeve (401) in the upper tooth sleeve (1); the rack (402) is meshingly connected with a driven gear (403) on a driven worm (304); and a plurality of telescopic shafts (404) are connected between the extension tooth sleeve (401) in the upper tooth sleeve (1) and the lower tooth sleeve (2).

4. The oral opening device for clinical use in dentistry according to claim 3, characterized in that: An end of the rack (402) close to the middle of the upper gear sleeve (1) is also provided with a limiting plate (405) for preventing the extended gear sleeve (401) from being separated from the upper gear sleeve (1).

5. The oral opening device for clinical use in dentistry according to claim 1, characterized in that: The gear sleeve bending adjustment component (5) comprises a screw rod (501) inserted into the upper gear sleeve (1), the screw rod (501) is meshingly connected with a slider (502), push rods (503) are fixed on both sides of the slider (502), and a limit rod (9) is rotatably provided on the slider (502), and the end of the limit rod (9) away from the slider (502) is slidably provided in a through hole of the upper gear sleeve (1) near the bottom.

6. The oral opening device for clinical use in dentistry according to claim 5, characterized in that: A tongue depressor (6) is rotatably provided on a side of the upper gear sleeve (1) away from the screw rod (501), a tongue depressor connecting rod (601) is rotatably connected to the bottom of the tongue depressor (6), and an end of the tongue depressor connecting rod (601) away from the tongue depressor (6) is rotatably connected to a limiting rod (9).

7. The oral opening device for clinical use in dentistry according to claim 1, characterized in that: The invention also comprises a planetary wheel knob (7), wherein the planetary wheel knob (7) comprises a knob housing (701), a gear ring (702) is fixed inside the knob housing (701), a plurality of planetary gears (703) are meshingly connected to the gear ring (702), the plurality of planetary gears (703) are meshingly connected to a sun gear (704) located in the middle, and a planetary wheel rotating plate (705) is also provided on one side of the knob housing (701), and the plurality of planetary gears (703) are rotatably fixed to the planetary wheel rotating plate (705).

8. The oral opening device for clinical use in dentistry according to claim 7, characterized in that: The middle portion of the sun gear (704) is fixedly connected to the telescopic worm (301) in the gear sleeve expansion assembly (3), and the middle portion of the knob housing (701) is detachably connected to the screw (501) in the gear sleeve bending adjustment assembly (5).

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