Oral radiographic imaging mouth stopper
By designing an open limiter for oral radiation imaging acquisition with lifting and forward extension components, the problem of difficulty in keeping the jaw stationary in patients is solved, and the precise position adjustment of the upper and lower teeth in CBCT examination is achieved to ensure image clarity and Diagnostic accuracy.
Patent Information
- Application Number
- CN201910966741.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2019-10-12
- Publication Date
- 2025-01-03
- Estimated Expiration
- 2039-10-12
AI Technical Summary
In oral imaging examination, it is difficult for patients to keep their jaw stationary for a long time, especially in ottomanda patients, resulting in artifact problems in CBCT imaging, affecting the accuracy of temporomandibular arthritis diagnosis and oral bone graft measurement.
An open limiter for oral radiation image acquisition is designed, including a housing, an upper bite plate, an elevator assembly, a vertical adjustment knob, a lower bite plate and a forward extension assembly. The position of the upper and lower bite plates is accurately adjusted through the adjustment knob to provide personality Supports the upper and lower teeth rows remain stationary when in different opening positions.
It effectively avoids the movement of the upper and lower teeth during image acquisition, ensures the clarity of CBCT images, adapts to different patient sizes and opening positions, and reduces the need for re-acquisition of images.
Smart Images
Figure CN110693447B_ABST
Abstract
Description
Technical Field
[0001] The invention relates to an opening stopper for collecting oral radiographic images. Background Art
[0002] Due to the anatomical structure of the masticatory muscles and the temporomandibular joint, the mandible can move forward, up and down, left and right when opening the mouth. When the maxillary and mandibular teeth are not in contact, it is difficult to maintain a static position for a long time.
[0003] In oral imaging examinations, CBCT examinations have become the most commonly used necessary means in the diagnosis and treatment of temporomandibular joint disease, oral implant bone volume measurement, and 3D printing guide plate production due to their high-precision three-dimensional image resolution. When taking CBCT examinations, patients are required to remain still for a long time to collect images. When examining the temporomandibular joint, it is often necessary to observe the joint movement of the patient's mandible at different opening positions. However, during the examination, it is difficult for patients to remain still in a certain mouth opening position, especially for edentulous patients, who find it difficult to remain still in the normal resting occlusal position for a long time. In this way, when collecting, if the patient's mandible moves, artifacts will be present in the collected images, which will have an adverse effect on the collected images, affecting the normal diagnosis of temporomandibular joint disease or oral implant bone volume measurement, and even requiring the image to be re-collected. For example, when making 3D printing guide plates, the high-density enamel will produce artifacts in the CBCT images, making it difficult for designers to separate the upper and lower teeth in the software, and the problem of needing to re-collect images will occur.
[0004] These clinical needs require that the patient should be assisted to keep the mandible still when opening the mouth during CBCT examination. Currently, there is no CBCT examination auxiliary equipment that can be personalized to adapt to different patient sizes and different opening positions.
[0005] The above-mentioned problems are those that should be considered and solved during the design and production of the opening limiter for oral radiographic image acquisition. Summary of the invention
[0006] The purpose of the present invention is to provide an opening limiter for oral radiographic image acquisition to solve the problem that during the existing CBCT examination, the patient's upper and lower dentitions are required not to touch, or the patient is required to maintain a certain mouth opening position and is difficult to remain still.
[0007] The technical solution of the present invention is:
[0008] An opening limiter for collecting oral radiographic images comprises a shell, an upper bite plate, a lifting assembly, a vertical adjustment knob, a lower bite plate, an extension assembly and a sagittal adjustment knob. A containing chamber is provided in the shell, and a lifting assembly and an extension assembly are provided in the containing chamber. The lifting assembly is arranged on the lifting assembly, and a lifting hole and an extension hole are provided on one side of the shell. The lifting assembly is connected to the upper bite plate through the lifting hole, and the extension assembly is connected to the lower bite plate through the extension hole. A first adjustment hole is provided on the top or bottom of the shell, and the vertical adjustment knob is connected to the lifting assembly through the first adjustment hole. A second adjustment hole is provided on the other side of the shell, and the sagittal adjustment knob is connected to the extension assembly through the second adjustment hole.
[0009] Optionally, the lifting assembly includes a lifting rod, a vertical slider and an upper buckle, the upper buckle is connected to the upper bite plate through the lifting hole, the upper buckle is arranged on the vertical slider, the vertical slider is provided with a first screw hole, the first screw hole is arranged perpendicular to the plane where the upper bite plate is located, the middle part of the lifting rod is provided with a first external thread adapted to the first screw hole, the two ends of the lifting rod are respectively movably connected to the top and the bottom of the outer shell, and one end of the lifting rod is also connected to the vertical adjustment knob through the first adjustment hole.
[0010] Optionally, a first guide rail is provided on the inner side of the shell, and a first guide groove adapted to the guide rail is provided on the side of the vertical sliding block, and the first guide groove is arranged parallel to the first screw hole.
[0011] Optionally, the extension component includes an extension rod, a sagittal slider, a fork arm and a lower buckle, the lower buckle passes through the extension hole to connect to the lower bite plate, the lower buckle is connected to one end of the fork arm, the other end of the fork arm is connected to the sagittal slider, the sagittal slider is provided with a second screw hole, the second screw hole is parallel to the plane where the lower bite plate is located, the extension rod is provided with a second external thread adapted to the second screw hole, and one end of the extension rod passes through the second adjustment hole to connect to the sagittal adjustment knob.
[0012] Optionally, the sagittal slider and the fork arm together form a through hole for the lifting rod to pass through.
[0013] Optionally, a second guide rail is provided on the inner side of the shell, a second guide groove matched with the second guide rail is provided on the side of the fork arm, and the second guide groove is arranged parallel to the second screw hole.
[0014] Optionally, the end of the lower buckle is connected to the lower bite plate, and the lower surface of the lower bite plate is provided with a lower groove. The two sides of the upper buckle are respectively connected to the upper bite plates. The upper bite plates on both sides of the upper buckle form an eight-shape together, and a groove for accommodating the lower bite plate is formed between the upper bite plates, and the upper surface of the upper bite plate is provided with an upper groove.
[0015] Optionally, elastic clamping plates are respectively provided at the ends of the upper and lower buckles, and buffer grooves are formed respectively by the elastic clamping plates, the upper and lower buckles, and limiting protrusions are respectively provided at the ends of the elastic clamping plates. The vertical slider and the fork arm are respectively provided with clamping holes for accommodating the elastic clamping plates, and the clamping holes are respectively connected to the end faces or through holes of the vertical slider.
[0016] Optionally, the vertical adjustment knob has the same structure as the sagittal adjustment knob, the vertical adjustment knob comprises a connecting platform, a knob inner frame, a knob outer frame and a connecting screw, the connecting platform adopts a square connecting platform, one end of the connecting platform is arranged at the end of the lifting rod, and the other end of the connecting platform is provided with a connecting screw hole, the knob inner frame comprises a top plate and a square column, the end of the square column is connected to the middle of the top plate, the top plate and the square column form a T shape, the top plate is provided with a circular hole, the square column is provided with a square connecting hole adapted to the connecting platform, the circular hole is connected with the square connecting hole, a first bayonet for accommodating the top plate and a second bayonet for the square column to pass through are provided in the middle of the knob outer frame, the first bayonet is connected to the second bayonet, the width of the first bayonet is greater than the width of the second bayonet, the height of the first bayonet is greater than the height of the top plate, the connecting platform passes through the first adjustment hole and penetrates into the square connecting hole of the square column, the connecting screw passes through the circular hole and is threaded into the connecting screw hole.
[0017] Optionally, locking components are respectively provided at the first adjustment hole and the second adjustment hole of the shell, and the locking components include an annular platform, which is concentrically arranged with the first adjustment hole or the second adjustment hole, and a plurality of locking edge grooves are arranged around the top surface of the annular platform, and the outer frame of the knob is provided with a locking platform, which is adapted to the locking edge grooves.
[0018] The beneficial effect of the present invention is that the opening limiter for oral radiographic image acquisition can provide support for the patient's upper and lower dentition when they are not in contact, thereby keeping the upper and lower dentition still for a long time, avoiding the movement of the upper and lower dentition when acquiring images, and thus ensuring that CBCT image acquisition can obtain clear image results. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] Figure 1 It is a schematic diagram of the structure of an opening stopper for oral radiographic image acquisition according to an embodiment of the present invention;
[0020] Figure 2 is a schematic diagram of the structure of the housing, the vertical adjustment knob, and the sagittal adjustment knob in the embodiment;
[0021] Figure 3 It is another structural schematic diagram of the opening stopper for oral radiographic image acquisition according to an embodiment of the present invention;
[0022] Figure 4 is a schematic diagram of the structure of the lifting assembly and the forward extension assembly in the embodiment;
[0023] Figure 5is another structural schematic diagram of the lifting assembly and the forward extension assembly in the embodiment;
[0024] Figure 6 It is a schematic diagram of the structure of the lifting assembly and the forward extension assembly, the first guide rail, and the second guide rail in the embodiment;
[0025] Figure 7 is a schematic diagram of the structure when the upper buckle is engaged with the vertical slider in the embodiment;
[0026] Figure 8 is a schematic diagram of the structure when the upper buckle and the vertical sliding block are separated in the embodiment;
[0027] Fig. 9 is a schematic diagram of the structure when the lower buckle is engaged with the sagittal slider in the embodiment;
[0028] Fig.10 is a schematic structural diagram of the embodiment when the lower buckle is separated from the sagittal slider;
[0029] Fig.11 is a structural schematic diagram of a specific example of a vertical adjustment knob in the embodiment;
[0030] Fig.12 is a structural schematic diagram of another specific example of the vertical adjustment knob in the embodiment;
[0031] Fig.13 is a schematic diagram of the structure of the embodiment when the vertical adjustment knob and the locking member are opened;
[0032] Fig.14 is a schematic diagram of the structure when the vertical adjustment knob and the locking member are locked in the embodiment;
[0033] Wherein: 1-housing, 2-upper bite plate, 3-lifting assembly, 4-vertical adjustment knob, 5-lower bite plate, 6-forward extension assembly, 7-sagittal adjustment knob, 8-first guide rail, 9-second guide rail, 10-inner limit plate, 11-outer limit plate, 12-upper groove, 13-lower groove, 14-lifting hole, 15-forward extension hole, 16-receiving groove, 17-clamping hole, 18-elastic clamping plate, 19-buffer groove, 20-limiting protrusion;
[0034] 31-lifting rod, 32-vertical sliding block, 33-upper buckle, 34-first external thread, 35-first screw hole, 36-first guide groove;
[0035] 41-a rotating hole, 42-a convex ridge, 43-a strip groove, 44-a connecting platform, 45-an inner frame of a knob, 46-an outer frame of a knob, 47-a connecting screw, 48-a round hole, 49-a first bayonet, 410-a first bayonet, 411-annular platform, 412 a bayonet side groove, 413-a bayonet platform;
[0036] 451-top plate, 452-square column, 453-square connecting hole;
[0037] 61-forward extension rod, 62-sagittal slider, 63-second external thread, 64-second screw hole, 65-fork arm, 66-lower buckle, 67-through hole, 68-second guide groove. DETAILED DESCRIPTION
[0038] The preferred embodiments of the present invention are described in detail below with reference to the accompanying drawings. Example
[0039] An opening limiter for collecting oral radiographic images comprises a shell 1, an upper bite plate 2, a lifting assembly 3, a vertical adjustment knob 4, a lower bite plate 5, a forward extension assembly 6 and a sagittal adjustment knob 7. A containing chamber is provided in the shell 1, in which the lifting assembly 3 and the forward extension assembly 6 are provided. The lifting assembly 3 is arranged on a side of the shell 1. A lifting hole 14 and a forward extension hole 15 are provided. The lifting assembly 3 is connected to the upper bite plate 2 through the lifting hole 14, and the forward extension assembly 6 is connected to the lower bite plate 5 through the forward extension hole 15. A first adjustment hole is provided on the top or bottom of the shell 1, and the vertical adjustment knob 4 is connected to the lifting assembly 3 through the first adjustment hole. A second adjustment hole is provided on the other side of the shell 1, and the sagittal adjustment knob 7 is connected to the forward extension assembly 6 through the second adjustment hole.
[0040] This type of opening limiter for oral radiographic image acquisition can provide support when the patient's upper and lower dentition are not in contact, thereby keeping the upper and lower dentitions still for a longer period of time, avoiding movement of the upper and lower dentitions when acquiring images, and thereby ensuring that CBCT image acquisition can obtain clear image results.
[0041] In this type of opening limiter for oral radiographic image acquisition, the lifting assembly 3 includes a lifting rod 31, a vertical slider 32 and an upper buckle 33. The upper buckle 33 passes through the lifting hole 14 to connect the upper bite plate 2. The upper buckle 33 is arranged on the vertical slider 32. The vertical slider 32 is provided with a first screw hole 35. The first screw hole 35 is arranged perpendicular to the plane where the upper bite plate 2 is located. The middle part of the lifting rod 31 is provided with a first external thread 34 adapted to the first screw hole 35. The two ends of the lifting rod 31 are respectively movably connected to the top and bottom of the outer shell 1. One end of the lifting rod 31 is also connected to the vertical adjustment knob 4 through the first adjustment hole.
[0042] This type of opening limiter for oral radiographic image acquisition drives the rotation of the lifting rod 31 by rotating the vertical adjustment knob 4, and the lifting rod 31 drives the vertical movement of the vertical slider 32, thereby driving the vertical movement of the upper buckle 33 and the upper bite plate 2, thereby realizing the control of the vertical position adjustment of the upper bite plate 2, and then by controlling the vertical distance between the upper bite plate 2 and the lower bite plate 5, the upper and lower opening spacing of the patient can be accurately adjusted to adapt to the different jaw sizes of patients and the examination requirements of doctors.
[0043] In this type of oral radiographic image acquisition opening stopper, the pitch of the first external thread 34 of the lifting rod 31 is relatively narrow, preferably 2 mm, so that the distance can be finely adjusted and it is difficult to cause position movement when the patient bites. Furthermore, a lifting height scale can be set at the lifting hole 14 of the housing 1, so that the vertical position of the previous inspection can be reproduced in the reexamination.
[0044] In one embodiment, a first guide rail 8 is provided on the inner side of the housing 1, and a first guide groove 36 adapted to the guide rail is provided on the side of the vertical slider 32, and the first guide groove 36 is arranged parallel to the first screw hole 35. By providing the first guide rail 8 and the first guide groove 36, the vertical movement of the vertical slider 32 is guided, the accuracy of the moving direction is ensured, the movement of the vertical slider 32 other than the vertical direction is restricted, and the anti-deformation capability is enhanced.
[0045] In one embodiment, the lifting hole 14 is a bar-shaped hole, and the lifting hole 14 facilitates the vertical movement of the upper buckle 33. The upper buckle 33 is used for connecting the upper bite plate 2, and the lower buckle 66 is used for connecting the lower bite plate 5, which can realize the rapid installation and removal of the upper bite plate 2 and the lower bite plate 5, and facilitate the replacement operation.
[0046] The forward extension component 6 includes a forward extension rod 61, a sagittal slider 62, a fork arm 65 and a lower buckle 66. The lower buckle 66 passes through the forward extension hole 15 to connect to the lower bite plate 5. The lower buckle 66 is connected to one end of the fork arm 65. The other end of the fork arm 65 is connected to the sagittal slider 62. The sagittal slider 62 is provided with a second screw hole 64. The second screw hole 64 is parallel to the plane where the lower bite plate 5 is located. The forward extension rod 61 is provided with a second external thread 63 adapted to the second screw hole 64. One end of the forward extension rod 61 passes through the second adjustment hole to connect to the sagittal adjustment knob 7.
[0047] The mouth opening stopper for collecting oral radiographic images drives the rotation of the protruding rod 61 by rotating the sagittal adjustment knob 7, thereby driving the sagittal movement of the sagittal slider 62, driving the sagittal movement of the fork arm 65, and then driving the sagittal movement of the lower buckle 66 and the lower bite plate 5. By controlling the protruding position of the lower bite plate 5, the protruding movement range of the mandible when the patient opens the mouth can be accurately adjusted to meet the different jaw sizes of the patient and the examination requirements of the physician.
[0048] In this type of oral radiographic image acquisition opening stopper, the pitch of the second external thread 63 of the protruding rod 61 is relatively narrow, preferably 1 mm, so that the distance can be finely adjusted and it is difficult to cause position movement when the patient bites. Furthermore, a protruding length scale can be set at the fork arm 65, so that the protruding jaw position of the previous examination can be reproduced in the reexamination.
[0049] In one embodiment, the sagittal slider 62 and the fork arm 65 together form a through hole 67 for the lifting rod 31 to pass through. The setting of the through hole 67 facilitates the setting of the lifting rod 31, and can achieve a compact overall structure with a small volume, thereby avoiding the problem of an overall volume being too large.
[0050] In one embodiment, a second guide rail 9 is provided on the inner side of the housing 1, and a second guide groove 68 adapted to the second guide rail 9 is provided on the side of the fork-shaped arm 65, and the second guide groove 68 is arranged in parallel with the second screw hole 64. By providing the second guide rail 9 and the second guide groove 68, the sagittal movement of the fork-shaped arm 65 is guided, the accuracy of the moving direction is ensured, the movement of the fork-shaped arm 65 other than the sagittal direction is restricted, and the anti-deformation ability is enhanced.
[0051] In one embodiment, second guide rails 9 are provided on both sides of the inner side of the housing 1, second guide grooves 68 are provided on both sides of the fork arm 65, and the forward hole 15 is used for the lower buckle 66 and the fork arm 65 to pass through, leaving space for sagittal sliding.
[0052] In the oral radiographic image acquisition opening stopper, Figure 6 The end of the lower buckle 66 is connected to the lower bite plate 5, and the two sides of the upper buckle 33 are respectively connected to the upper bite plates 2. The upper bite plates 2 on both sides of the upper buckle 33 form an eight-shaped shape together, and a groove 16 for accommodating the lower bite plate 5 is formed between the upper bite plates 2. The length of the lower bite plate 5 is small, preferably 2-5 cm, and a groove 16 sufficient to embed the lower bite plate 5 is reserved in the middle of the upper bite plates 2 on both sides. Figure 5 The lower buckle 66 is preferably L-shaped, so that when approaching until they overlap, they can pass through it in an interlaced manner, so that they overlap to the same plane, thereby being able to adapt to a smaller opening position.
[0053] like Figure 6 The upper surface of the upper bite plate 2 is provided with an upper groove 12, and the lower surface of the lower bite plate 5 is provided with a lower groove 13, which facilitates the static contact between the maxillary incisor and the upper bite plate 2, and between the mandibular incisor and the lower bite plate 5, and avoids displacement. The upper bite plate 2 and the lower bite plate 5 are made of medical plastic material, which is non-biotoxic, does not cause radiation obstruction and artifacts that interfere with CBCT imaging, and is preferably disposable, safe and hygienic.
[0054] like Figure 7 and Fig. 9 The ends of the upper snap buckle 33 and the lower snap buckle 66 are respectively provided with elastic clips 18, and the elastic clips 18 and the upper snap buckle 33 and the lower snap buckle 66 respectively form buffer grooves 19, and the ends of the elastic clips 18 are vertically provided with limiting protrusions 20, and the vertical slider 32 and the fork arm 65 are respectively provided with clip holes 17 for accommodating the elastic clips 18, and the clip holes 17 are respectively connected to the end faces or through holes 67 of the vertical slider 32.
[0055] The upper buckle 33 is connected to the vertical slider 32 through the elastic clamping plate 18 and the limiting protrusion 20, and the lower buckle 66 is connected to the sagittal slider 62 through the elastic clamping plate 18 and the limiting protrusion 20. Specifically, when the clamping is required, the elastic clamping plate 18 and the limiting protrusion 20 are extended into the clamping hole 17, and the limiting protrusion 20 is embedded in the clamping hole 21 to complete the clamping; when separation is required, a thin stick or a flat-head screwdriver or other tool is used to press the limiting protrusion 20 toward the buffer groove 19, so that the limiting protrusion 20 completely enters the clamping hole 21, and then the upper buckle 33 and the lower buckle 66 are pulled out in the direction away from the clamping hole 17, as shown in FIG. Figure 8 and Fig.10 .
[0056] The upper buckle 33 and the lower buckle 66 are provided to facilitate the installation and removal of the upper bite plate, the lower bite plate and the vertical slider 32 and the sagittal slider 62, so that when disposable upper bite plates and lower bite plates are used, they are easy to replace, and when sterilizable upper bite plates and lower bite plates are used, they are easy to install and remove, saving time and effort. The buffer groove 19 is provided to provide space for the movement of the elastic card plate 18.
[0057] The specific use process of the mouth stopper for oral radiographic image acquisition is as follows: first, the patient is positioned for CT shooting, the vertical adjustment knob 4 is rotated to adjust the distance between the upper bite plate 2 and the lower bite plate 5 to the vertical height required for shooting, and the sagittal adjustment knob 7 is rotated to adjust the lower bite plate 5 to the forward or backward position required for shooting the patient's mandible. The patient is asked to lightly bite the upper and lower bite plates 5, and the lateral incisors to premolars on both sides of the maxilla (the top of the alveolar ridge at the corresponding position when the teeth are missing) are in contact with the groove on the upper surface of the upper bite plate 2, and the mandibular incisors (the top of the alveolar ridge at the corresponding position when the teeth are missing) are in contact with the groove on the lower surface of the lower bite plate 5. At this time, the patient's mandible is in the required occlusal position, and the upper and lower bite plates 5 are bitten lightly to keep it still and maintain the still time required for CT shooting. Finally, the maxillofacial CT is shot according to the required requirements to obtain the acquired maxillofacial CT images, and it can ensure the smooth progress of the acquisition process and the clarity of the acquired images.
[0058] In one embodiment, the shell 1 is a rectangular parallelepiped, with the surface facing the patient as the rear surface, the surface opposite to the rear surface as the front surface, and the surface corresponding to the direction of the patient's head as the upper surface. The upper surface has a circular hole with an annular groove for fitting the vertical adjustment knob 4, the front surface is fitted with the sagittal adjustment knob 7, and the rear surface is opened to form a lifting hole 14 to accommodate the moving space of the connecting rod.
[0059] In one embodiment, Fig.11The vertical adjustment knob 4 is a cylinder with a strip groove on the inner side. The strip groove is arranged around the vertical adjustment knob 4. The vertical adjustment knob 4 can only rotate axially. The vertical adjustment knob 4 is provided with a rotation hole 41. The inner side of the rotation hole 41 of the vertical adjustment knob 4 is provided with a plurality of ridges 42. The end of the lifting rod 31 is provided with a plurality of strip grooves 43 adapted to the ridges 42. The end of the lifting rod 31 penetrates into the rotation hole 41 of the vertical adjustment knob 4. The outer side of the vertical adjustment knob 4 can also be provided with ridges for easy rotation.
[0060] The sagittal adjustment knob 7 is a cylinder with the same structure as the vertical adjustment knob 4. The rotation axis of the sagittal adjustment knob 7 is perpendicular to the vertical adjustment knob 4. The sagittal adjustment knob 7 is provided with two rotating holes. The inner side of the second rotating hole of the sagittal adjustment knob 7 is provided with two convex ridges. The end of the forward rod 61 is provided with two strip grooves adapted to the two convex ridges. The end of the forward rod 61 is inserted into the second rotating hole of the sagittal adjustment knob 7.
[0061] An inner limit plate 10 and an outer limit plate 11 are provided at the end of the lifting rod 31 . The inner limit plate 10 and the outer limit plate 11 are respectively provided at the inner and outer sides of the housing 1 to limit the lifting rod 31 in the housing 1 .
[0062] In another embodiment, the vertical adjustment knob 4 has the same structure as the sagittal adjustment knob 7. Fig.12 The vertical adjustment knob 4 includes a connecting platform 44, a knob inner frame 45, a knob outer frame 46 and a connecting screw 47. Fig.13 and Fig.14 The connecting platform 44 is a square connecting platform 44, one end of which is arranged at the end of the lifting rod 31, and the other end of the connecting platform 44 is provided with a connecting screw hole, the knob inner frame 45 includes a top plate 451 and a square column 452, the end of the square column 452 is connected to the middle of the top plate 451, the top plate 451 and the square column 452 form a T shape, the top plate 451 is provided with a round hole 48, the square column 452 is provided with a square connecting hole 453 adapted to the connecting platform 44, and the round hole 48 is connected with the square connecting hole 453, A first bayonet 49 for accommodating the top plate 451 and a second bayonet 410 for the square column 452 to pass through are provided in the middle of the knob frame 46. The first bayonet 49 is connected to the second bayonet 410. The width of the first bayonet 49 is greater than the width of the second bayonet 410. The height of the first bayonet 49 is greater than the height of the top plate 451. The connecting platform 44 passes through the first adjustment hole and is inserted into the square connecting hole 453 of the square column 452. The connecting screw 47 passes through the round hole 48 and is threaded into the connecting screw hole.
[0063] like Fig.13 and Fig.14The first adjustment hole and the second adjustment hole of the housing 1 are respectively provided with locking parts, and the locking parts include an annular platform 411, which is concentrically arranged with the first adjustment hole or the second adjustment hole, and a plurality of locking edge grooves 412 are arranged around the top surface of the annular platform 411, and the knob outer frame 46 is provided with a locking platform 413, which is adapted to the locking edge groove 412.
[0064] like Fig.13 When it is necessary to rotate the lifting rod 31 by vertically adjusting the knob 4, pull up the knob outer frame 46 so that the positioning platform 413 of the knob outer frame 46 is disengaged from the positioning edge groove 412 to achieve unlocking. The knob outer frame 46 drives the knob inner frame 45 and then drives the connecting platform 44, so that the lifting rod 31 rotates.
[0065] like Fig.14 When there is no need to rotate the lifting rod 31 by vertically adjusting the knob 4, the knob frame 46 is pressed down so that the positioning platform 413 of the knob frame 46 is inserted into the positioning edge groove 412, and the positioning edge groove 412 is locked to the positioning platform 413, thereby locking the knob frame 46 and achieving the purpose of preventing the knob frame 46 from rotating.
[0066] By setting a locking part, the vertical adjustment knob 4 can be quickly locked and unlocked. When rotation is not needed, the vertical adjustment knob 4 can be locked to avoid rotation of the vertical adjustment knob 4, thereby avoiding movement of the upper bite plate during use and ensuring smooth use.
Claims
1. An opening stopper for oral radiographic image acquisition, characterized in that: It includes a shell, an upper bite plate, a lifting assembly, a vertical adjustment knob, a lower bite plate, a forward extension assembly and a sagittal adjustment knob. The shell is provided with a chamber, and the lifting assembly and the forward extension assembly are provided in the chamber. The lifting assembly is arranged on the lifting assembly. A lifting hole and a forward extension hole are provided on one side of the shell. The lifting assembly is connected to the upper bite plate through the lifting hole, and the forward extension assembly is connected to the lower bite plate through the forward extension hole. A first adjustment hole is provided on the top or bottom of the shell, and the vertical adjustment knob is connected to the lifting assembly through the first adjustment hole. A second adjustment hole is provided on the other side of the shell, and the sagittal adjustment knob is connected to the forward extension assembly through the second adjustment hole. The lifting assembly includes a lifting rod, a vertical slider and an upper buckle, the upper buckle passes through the lifting hole to connect the upper bite plate, the upper buckle is arranged on the vertical slider, the vertical slider is provided with a first screw hole, the first screw hole is arranged perpendicular to the plane where the upper bite plate is located, the middle part of the lifting rod is provided with a first external thread adapted to the first screw hole, the two ends of the lifting rod are movably connected to the top and the bottom of the shell respectively, and one end of the lifting rod is also connected to the vertical adjustment knob through the first adjustment hole; The forward extension component includes a forward extension rod, a sagittal slider, a fork arm and a lower buckle, the lower buckle passes through the forward extension hole to connect to the lower bite plate, the lower buckle is connected to one end of the fork arm, the other end of the fork arm is connected to the sagittal slider, the sagittal slider is provided with a second screw hole, the second screw hole is parallel to the plane where the lower bite plate is located, the forward extension rod is provided with a second external thread adapted to the second screw hole, one end of the forward extension rod passes through the second adjustment hole to connect to the sagittal adjustment knob; the end of the lower buckle is connected to the lower bite plate, the lower surface of the lower bite plate is provided with a lower groove, the two sides of the upper buckle are respectively connected to the upper bite plates, the upper bite plates on both sides of the upper buckle form an eight-shaped shape together, and a receiving groove for accommodating the lower bite plate is formed between the upper bite plates, and an upper groove is provided on the upper surface of the upper bite plate; The ends of the upper buckle and the lower buckle are respectively provided with elastic clamping plates, the elastic clamping plates and the upper buckle and the lower buckle respectively form buffer grooves, the ends of the elastic clamping plates are provided with limiting protrusions, the vertical slider and the fork arm are respectively provided with clamping holes for accommodating the elastic clamping plates, and the clamping holes are respectively connected to the end faces or through holes of the vertical slider; The vertical adjustment knob has the same structure as the sagittal adjustment knob. The vertical adjustment knob includes a connecting platform, a knob inner frame, a knob outer frame and a connecting screw. The connecting platform adopts a square connecting platform. One end of the connecting platform is arranged at the end of the lifting rod, and the other end of the connecting platform is provided with a connecting screw hole. The knob inner frame includes a top plate and a square column. The end of the square column is connected to the middle of the top plate. The top plate and the square column form a T shape. The top plate is provided with a circular hole. The square column is provided with a square connecting hole adapted to the connecting platform. The circular hole is connected with the square connecting hole. A first bayonet for accommodating the top plate and a second bayonet for the square column to pass through are provided in the middle of the knob outer frame. The first bayonet is connected to the second bayonet. The width of the first bayonet is greater than the width of the second bayonet. The height of the first bayonet is greater than the height of the top plate. The connecting platform passes through the first adjustment hole and penetrates into the square connecting hole of the square column. The connecting screw passes through the circular hole and is threaded into the connecting screw hole.
2. The opening stopper for oral radiographic image acquisition according to claim 1, characterized in that: A first guide rail is arranged on the inner side of the shell, and a first guide groove adapted to the guide rail is arranged on the side of the vertical sliding block, and the first guide groove is arranged parallel to the first screw hole.
3. The opening stopper for oral radiographic image acquisition according to claim 1, characterized in that: The sagittal sliding block and the fork arm together form a through hole for the lifting rod to pass through.
4. The opening stopper for oral radiographic image acquisition according to claim 1, characterized in that: A second guide rail is arranged on the inner side of the shell, a second guide groove matched with the second guide rail is arranged on the side of the fork-shaped arm, and the second guide groove is arranged in parallel with the second screw hole.
5. The opening stopper for oral radiographic image acquisition according to claim 1, characterized in that: The first adjustment hole and the second adjustment hole of the shell are respectively provided with locking parts, and the locking parts include an annular platform, which is concentrically arranged with the first adjustment hole or the second adjustment hole, and a plurality of locking edge grooves are arranged around the top surface of the annular platform, and the outer frame of the knob is provided with a locking platform, which is adapted to the locking edge grooves.