Positioning device for oral CBCT and oral CBCT

Abstract

The present invention discloses a positioning device for an oral CBCT and an oral CBCT. The positioning device comprises: a main frame having an axial hole; a rotating shaft rotatably engaged with the axial hole, a limiting structure disposed between the rotating shaft and the axial hole for retaining the rotating shaft in a corresponding position; and an eccentric saddle disposed on the outer periphery of the rotating shaft, engaging eccentrically with the rotating shaft, and having a larger cross-sectional area at the end than at the middle. The positioning device for an oral CBCT according to the present invention enables accurate adjustment of the head pitch angle, providing simple, easy-to-operate physical support for patients to remain still and stable during imaging.

Description

Technical Field

[0001] The present invention relates to the technical field of oral CBCT, and in particular to a positioning device for oral CBCT and an oral CBCT having the positioning device for oral CBCT. Background Art

[0002] In a three-in-one oral CBCT (i.e., CT, panoramic, and lateral), both CT and panoramic images are acquired by rotating the X-ray source and X-ray sensor on either side of a C-shaped rotating arm around the patient's head under a head positioning device. To obtain excellent images, the patient's head must remain stationary during acquisition—meaning, it must not move during X-ray emission.

[0003] On the one hand, if the patient feels comfortable, they are more likely to remain still, while if the patient is uncomfortable or under pressure and unsupported, the patient is more likely to move. On the other hand, the head positioning device should be as transparent to X-rays as possible so that they do not form artifacts that can reduce the diagnostic effectiveness of radiographic images. This affects the choice of materials and material thickness, such as non-metallic materials with good transmittance. At the same time, it is necessary to ensure that the head positioning device has sufficient rigidity to ensure that the patient is positioned and supported without displacement. In addition, the head positioning device should be able to adapt to any patient from pediatric patients to adults, so it needs to have a wide degree of adjustment freedom to adapt to the physiological and anatomical dimensions of different patients.

[0004] Previous head positioning devices lack structural stability and fail to maintain a horizontal Frankfurt plane (i.e., the forward and backward tilt angle of the head), leaving the forehead unsupported. Some head positioning devices have front and back supports but lack side-to-side clamping or soft straps for tightening. This method of fixation is cumbersome and inefficient, requiring the patient to remain still for extended periods of time. Summary of the Invention

[0005] The present invention aims to address at least one of the technical problems existing in the prior art. To this end, the present invention provides a positioning device for oral CBCT. The positioning device can adjust and support the head's pitch angle, and, in conjunction with left and right clamping mechanisms, achieve triangular clamping and fixation of the head.

[0006] The present invention also provides an oral CBCT system having the positioning device for oral CBCT.

[0007] According to an embodiment of the first aspect of the present invention, a positioning device for an oral CBCT comprises: a main frame, the main frame being provided with an axial hole; a rotating shaft, the rotating shaft being rotatably engaged with the axial hole, a limiting structure being provided between the rotating shaft and the axial hole, the limiting structure being used to limit the rotating shaft to a corresponding position; and an eccentric saddle, the eccentric saddle being provided on the outer periphery of the rotating shaft, the eccentric saddle being eccentrically engaged with the rotating shaft, the cross-sectional area of ​​the end portion of the eccentric saddle being larger than the cross-sectional area of ​​the middle portion.

[0008] The positioning device for oral CBCT according to the embodiment of the present invention can achieve accurate adjustment of the head pitch angle, and provides a simple and easy-to-operate physical support for the patient to remain still and stable during the imaging process.

[0009] In addition, the positioning device for oral CBCT according to an embodiment of the present invention also has the following additional technical features:

[0010] According to some embodiments of the present invention, a plunger is provided on the outer peripheral wall of the rotating shaft, and a plurality of teeth are provided on the inner peripheral wall of the shaft hole. The plunger cooperates with the teeth to form the limiting structure.

[0011] In some specific embodiments of the present invention, the outer peripheral wall of the rotating shaft is provided with a mounting plane, the rotating shaft is provided with a mounting hole passing through the mounting plane, the plunger is fitted in the mounting hole, and the head of the plunger extends from the mounting hole to cooperate with the tooth portion.

[0012] According to some embodiments of the present invention, the positioning device for oral CBCT further includes: a first knob and a second knob, wherein the first knob and the second knob are respectively connected to two ends of the rotating shaft.

[0013] According to some embodiments of the present invention, the main frame includes: a base, the base is provided with the shaft hole; and a guide shaft, the base is movably provided on the guide shaft.

[0014] In some embodiments of the present invention, the base is provided with a guide hole and an elastic groove, the guide shaft cooperates with the guide hole, and the elastic groove is provided adjacent to and surrounds the guide hole.

[0015] In some specific embodiments of the present invention, there are multiple elastic grooves, and the multiple elastic grooves are distributed at intervals along the circumference of the guide hole.

[0016] In some specific embodiments of the present invention, there are a plurality of elastic grooves, the plurality of elastic grooves are spaced apart along the radial direction of the guide hole, and two adjacent elastic grooves are staggered in the circumferential direction of the guide hole.

[0017] In some embodiments of the present invention, there are two axial holes, two guide shafts, and the two guide shafts are respectively arranged adjacent to the two axial holes.

[0018] An oral CBCT according to an embodiment of the second aspect of the present invention includes the positioning device for oral CBCT according to the embodiment of the first aspect of the present invention.

[0019] According to an embodiment of the present invention, the positioning device for oral CBCT described above can accurately adjust the head pitch angle, providing a simple and easy-to-operate physical support for the patient to remain still and stable during imaging.

[0020] Additional aspects and advantages of the present invention will be set forth in part in the description which follows and, in part, will be obvious from the description which follows, or may be learned by practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is a perspective view of a positioning device for oral CBCT according to an embodiment of the present invention;

[0022] Figure 2 2 is a schematic structural diagram of a positioning device for oral CBCT according to an embodiment of the present invention;

[0023] Figure 3 is a cross-sectional view of a positioning device for oral CBCT according to an embodiment of the present invention;

[0024] Figure 4 is a cross-sectional view from another angle of the positioning device for oral CBCT according to an embodiment of the present invention;

[0025] Figure 5 is a top view of a positioning device for oral CBCT according to an embodiment of the present invention;

[0026] Figure 6 is a schematic diagram of the assembly of a rotating shaft and an eccentric saddle according to an embodiment of the present invention;

[0027] Figure 7 Schematic diagram of a rotating shaft and an eccentric saddle according to an embodiment of the present invention.

[0028] Reference numerals:

[0029] Positioning device 10 for oral CBCT, main frame 100, shaft hole 101, tooth portion 102, base 110, guide hole 111, elastic groove 112, guide shaft 120, rotating shaft 200, plunger 201, mounting plane 202, mounting hole 203, eccentric saddle 300, first knob 410, second knob 420. DETAILED DESCRIPTION

[0030] The following describes embodiments of the present invention in detail. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present invention and are not to be construed as limiting the present invention.

[0031] A positioning device 10 for oral CBCT according to an embodiment of the first aspect of the present invention will be described below with reference to the accompanying drawings.

[0032] like Figure 1-Figure 7 As shown, a positioning device 10 for oral CBCT according to an embodiment of the present invention includes: a main frame 100 , a rotating shaft 200 and an eccentric saddle 300 .

[0033] Specifically, the main frame 100 is provided with an axial hole 101. A rotating shaft 200 is rotatably engaged with the axial hole 101. A retaining structure is provided between the rotating shaft 200 and the axial hole 101. The retaining structure is used to restrict the rotating shaft 200 to a corresponding position, for example, to achieve a stop of the rotating shaft 200 at any angle. An eccentric saddle 300 is provided on the outer periphery of the rotating shaft 200. The eccentric saddle 300 is eccentrically engaged with the rotating shaft 200, that is, the eccentric saddle 300 is sleeved on the rotating shaft 200, and the central axis of the eccentric saddle 300 is staggered with the central axis of the rotating shaft 200. Among them, the cross-sectional area of ​​the end parts of the eccentric saddle 300 is larger than the cross-sectional area of ​​the middle part, that is, the cross-sectional area of ​​the eccentric saddle 300 decreases from the two ends toward the middle. For example, the central axis of the rotating shaft 200 is oriented in the horizontal direction. In the longitudinal section of the eccentric saddle 300, the contour line of the eccentric saddle 300 is an inwardly concave arc. The outer shape of the eccentric saddle 300 is saddle-shaped, so as to better fit the forehead.

[0034] It is understandable that Figure 7 As shown, the maximum stroke of the relative forehead adjustment is the difference between the maximum distance a and the minimum distance b between the center of the rotating shaft 200 and the contour surface of the eccentric saddle 300, that is, ab.

[0035] The positioning device 10 for oral CBCT according to an embodiment of the present invention can achieve accurate adjustment of the head pitch angle, and provides a simple and easy-to-operate physical support for the patient to remain still and stable during the imaging process.

[0036] According to some embodiments of the present invention, Figure 3 and Figure 6 As shown, a plunger 201 is provided on the outer circumferential wall of the rotating shaft 200, and a plurality of teeth 102 are provided on the inner circumferential wall of the shaft hole 101. The plunger 201 cooperates with the teeth 102 to form a retaining structure. For example, the plurality of teeth 102 are evenly distributed along the circumference of the shaft hole 101. The cooperation between the plunger 201 and the teeth 102 can position the rotating shaft 200 at a corresponding angle.

[0037] In some specific embodiments of the present invention, Figure 3 and Figure 6 As shown, the outer wall of the rotating shaft 200 is provided with a mounting plane 202, and the rotating shaft 200 is provided with a mounting hole 203 passing through the mounting plane 202. The plunger 201 is fitted in the mounting hole 203, and the head of the plunger 201 extends from the mounting hole 203 to cooperate with the tooth portion 102.

[0038] According to some embodiments of the present invention, Figure 1 and Figure 2 As shown, the positioning device 10 for oral CBCT further includes: a first knob 410 and a second knob 420, which are respectively connected to the two ends of the rotating shaft 200. In this way, by rotating the first knob 410 or the second knob 420, the rotating shaft 200 can be rotated, which is easy to operate and has good stability.

[0039] According to some embodiments of the present invention, Figure 1 and Figure 2 As shown, the main frame 100 includes a base 110 and a guide shaft 120. The base 110 is provided with an axial hole 101 and is movably mounted on the guide shaft 120. This allows for highly adjustable height to accommodate the anatomical dimensions of different patients, creating a multi-free adjustment mechanism that can accommodate different head shapes and sizes. For example, the guide shaft 120 extends in an up-down direction and may be two guide shafts 120, one on each side of the base 110, ensuring smoother and more stable movement.

[0040] In some specific embodiments of the present invention, Figure 1 and Figure 2 As shown, there are two shaft holes 101, which are respectively located on the left and right sides of the base 110, and the two guide shafts 120 are respectively arranged adjacent to the two shaft holes 101. In this way, not only is the structure more compact, but the movement is more stable and smooth, the structural reliability is high, and the operation is more convenient.

[0041] In some embodiments of the present invention, Figure 1 and Figure 5 As shown, base 110 is provided with a guide hole 111 and an elastic groove 112. Guide shaft 120 cooperates with guide hole 111, and elastic groove 112 is disposed adjacent to and surrounds guide hole 111. This allows guide hole 111 to slightly expand and become elastic. This creates a certain preload upon assembly of guide hole 111 and guide shaft 120, creating frictional resistance and allowing the guide hole 111 to remain at any desired height. Furthermore, when base 110 is moved up and down, guide hole 111 can elastically deform without becoming stuck. For example, elastic groove 112 may be an arcuate groove.

[0042] In some specific embodiments of the present invention, Figure 5 As shown, there are multiple elastic grooves 112, and the multiple elastic grooves 112 are distributed at intervals along the circumference of the guide hole 111, so that the elasticity is better.

[0043] In some specific embodiments of the present invention, Figure 5 As shown, there are multiple elastic grooves 112 , which are spaced apart along the radial direction of the guide hole 111 , and two adjacent elastic grooves 112 are staggered in the circumferential direction of the guide hole 111 , so that the elasticity is better.

[0044] In some embodiments of the present invention, Figure 5 As shown, multiple elastic grooves 112 are arranged in multiple circles concentric with the guide hole 111 in the radial direction of the guide hole 111, each circle includes at least two elastic grooves 112, and the elastic grooves 112 in each circle are opposite in the radial direction of the guide hole 111. The elastic grooves 112 of two adjacent circles are staggered in the circumferential direction of the guide hole 111, so as to have better elasticity.

[0045] A positioning device 10 for oral CBCT according to a specific embodiment of the present invention will be described in detail below with reference to the accompanying drawings.

[0046] During CT or panoramic scans, the patient must utilize the positioning device 10 for oral CBCT, mounted on the examination table, to ensure they remain stable and still. The positioning device 10 for oral CBCT also includes a chin positioning mechanism, located beneath the base 110. This mechanism primarily provides head support and is height-adjustable. The chin positioning mechanism's tongue-biting groove provides occlusal alignment for the upper and lower teeth.

[0047] The base 110 is an engineering plastic part. The inner sides of the shaft holes 101 on the left and right sides of the base 110 are serrated. The ball head of the plunger 201 is pre-pressed on the side of the shaft hole 101. The ball head cooperates with the serrated side to enable the rotating shaft 200 to stay at any angle. The eccentric saddle 300 is eccentrically matched with the rotating shaft 200, and its appearance is saddle-shaped, which can better fit the forehead. Because carbon fiber tubes have low density, good rigidity, are not easy to deform, and have good X-ray penetration, for this reason, the guide shaft 120 is a carbon fiber tube. The guide holes 111 on both sides of the base 110 that cooperate with the carbon fiber tubes are surrounded by diffused arc-shaped elastic grooves 112. In this way, the guide holes 111 can expand slightly and have elasticity. After being assembled with the carbon fiber tubes, they have a certain pre-pressure, thereby forming friction resistance, allowing them to stay at any height. At the same time, when the base 110 is moved up and down, the guide holes 111 can elastically deform without getting stuck. The carbon fiber tubes can cooperate with the base plate through the fixing tube to form a complete skull fixation device. According to different head lengths, the operator can freely adjust the height to put the patient in a reliable and stable support state.

[0048] The positioning device 10 for oral CBCT according to an embodiment of the present invention utilizes an eccentric circle plus ball plunger positioning mechanism to accurately adjust the head pitch angle, providing simple, easy-to-operate physical support for patients to remain still and stable during imaging. Furthermore, the vertical degree of freedom adjustment and saddle-shaped cylindrical support structure can adapt to different patient head shapes and sizes, resulting in a simple structure and ease of manufacture.

[0049] The oral CBCT according to the second embodiment of the present invention includes the positioning device 10 for oral CBCT according to the first embodiment of the present invention.

[0050] According to an embodiment of the present invention, the positioning device 10 for oral CBCT can accurately adjust the head pitch angle, providing a simple and easy-to-operate physical support for the patient to remain still and stable during imaging.

[0051] Other components and operations of the oral CBCT according to the embodiment of the present invention are known to those skilled in the art and will not be described in detail here.

[0052] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0053] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "plurality" means two or more.

[0054] In the description of the present invention, "a first feature" or "a second feature" may include one or more such features. A first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may also include the first and second features being in contact not directly but through another feature therebetween. A first feature being "above," "above," or "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is at a higher level than the second feature.

[0055] It should be noted that, in the description of the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; mechanical connections or electrical connections; direct connections, indirect connections through an intermediate medium, or internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0056] Throughout this specification, references to terms such as "one embodiment," "some embodiments," "specific embodiments," "example," or "some examples" indicate that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or example are included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0057] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to the embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the claims and their equivalents.

Claims

1. A positioning device for oral CBCT, characterized in that: include: A main frame, wherein the main frame is provided with an axis hole; a rotating shaft, the rotating shaft being rotatably matched with the shaft hole, a limiting structure being provided between the rotating shaft and the shaft hole, the limiting structure being used to limit the rotating shaft to a corresponding position; An eccentric saddle, wherein the eccentric saddle is arranged on the outer periphery of the rotating shaft, the eccentric saddle is eccentrically matched with the rotating shaft, and the cross-sectional area of ​​the end portion of the eccentric saddle is larger than the cross-sectional area of ​​the middle portion; The eccentric saddle has a saddle-like shape, and in the longitudinal section of the eccentric saddle, the contour line of the eccentric saddle is an inwardly concave arc; The central axis of the eccentric saddle is staggered with the central axis of the rotating shaft; The main framework includes: a base, wherein the base is provided with the shaft hole; a guide shaft, the base being movably disposed on the guide shaft; The base is provided with a guide hole and an elastic groove. The guide shaft matches the guide hole. The elastic groove is arranged adjacent to and surrounds the guide hole.

2. The positioning device for oral CBCT according to claim 1, characterized in that: The outer peripheral wall of the rotating shaft is provided with a plunger, and the inner peripheral wall of the shaft hole is provided with a plurality of teeth. The plunger cooperates with the teeth to form the limiting structure.

3. The positioning device for oral CBCT according to claim 2, characterized in that: The outer peripheral wall of the rotating shaft is provided with a mounting plane, and the rotating shaft is provided with a mounting hole penetrating the mounting plane. The plunger is fitted in the mounting hole, and the head of the plunger extends from the mounting hole to cooperate with the tooth portion.

4. The positioning device for oral CBCT according to claim 1, characterized in that: Also includes: A first knob and a second knob, wherein the first knob and the second knob are respectively connected to two ends of the rotating shaft.

5. The positioning device for oral CBCT according to claim 1, characterized in that: There are a plurality of elastic grooves, and the plurality of elastic grooves are distributed at intervals along the circumference of the guide hole.

6. The positioning device for oral CBCT according to claim 1, characterized in that: There are a plurality of elastic grooves, and the plurality of elastic grooves are distributed at intervals along the radial direction of the guide hole, and two adjacent elastic grooves are staggered in the circumferential direction of the guide hole.

7. The positioning device for oral CBCT according to claim 1, characterized in that: There are two axial holes and two guide shafts, and the two guide shafts are respectively arranged adjacent to the two axial holes.

8. An oral CBCT, characterized in that: The method comprises a positioning device for oral CBCT according to any one of claims 1 to 6.

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