Positioning device for oral CBCT and oral CBCT

Abstract

The present invention discloses a positioning device for oral CBCT and an oral CBCT, comprising: a base shell, the base shell is provided with a limiting guide groove; an adjusting knob, the adjusting knob is installed on the base shell and provided with an adjusting rod, and the adjusting rod is provided with a positioning member; a guide assembly, the guide assembly is arranged in the limiting guide groove and is threadedly matched with the adjusting rod, and the positioning member is used to limit the position of the adjusting rod in its axial direction to convert the rotational movement of the adjusting rod into the movement of the guide assembly in the limiting guide groove; a positioning base, the positioning base is connected to the guide assembly, and the adjusting knob and the positioning base are respectively located at two ends of the guide assembly. According to the positioning device for oral CBCT of the present invention, the head pitch angle can be accurately adjusted, and a simple and easy-to-operate physical support is provided for the patient to keep still and stable during the shooting process.

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 the three-in-one (i.e. CT, panoramic, lateral) oral CBCT, both CT and panoramic images are acquired by rotating the X-ray source and X-ray sensor on both sides of the C-shaped rotating arm around the patient's head under the head positioning device. In order to obtain excellent images, the patient's head must remain in the acquisition process, that is, it does not move during the X-ray emission.

[0003] On the one hand, if the patient feels comfortable, the patient is 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, which affects the choice of materials and material thickness, such as choosing non-metallic materials with good transmittance, while also ensuring that the head positioning device has sufficient rigidity to ensure that the patient is provided with non-displacement positioning and support. In addition, the head positioning device should be able to adapt to any patient from pediatric patients to adult patients, so it needs to have a wide degree of adjustment freedom to adapt to the physiological and anatomical dimensions of different patients.

[0004] The head positioning device in the related art is not strong enough and cannot ensure the level of the Frankfurt plane (i.e. the front and back tilt angle of the head), and the forehead is not supported. Some head structures have front and back support, but no left and right clamping or soft belt locking. This fixing method is cumbersome and inefficient, and the patient has to remain still for a long time. Summary of the invention

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

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

[0007] According to an embodiment of the first aspect of the present invention, a positioning device for oral CBCT includes: a base shell, the base shell is provided with a limiting guide groove; an adjusting knob, the adjusting knob is mounted on the base shell and is provided with an adjusting rod, and the adjusting rod is provided with a positioning member; a guide assembly, the guide assembly is arranged in the limiting guide groove and is threadedly matched with the adjusting rod, the positioning member is used to limit the position of the adjusting rod in its axial direction to convert the rotational movement of the adjusting rod into the movement of the guide assembly in the limiting guide groove; a positioning base, the positioning base is connected to the guide assembly, and the adjusting knob and the positioning base are respectively located at two ends of the guide assembly.

[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 provide a simple and easy-to-operate physical support for the patient to remain still and stable during the shooting process.

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

[0010] According to some embodiments of the present invention, one of the base shell and the guide assembly is provided with a guide groove and the other is provided with a guide protrusion, and the guide protrusion cooperates with the guide groove.

[0011] According to some embodiments of the present invention, the guide assembly is provided with an escape space for evading the adjusting rod.

[0012] According to some embodiments of the present invention, the positioning device for oral CBCT further includes: a guide shaft, the guide shaft extends in an up-down direction, and the base shell is movably disposed on the guide shaft.

[0013] According to some embodiments of the present invention, the positioning base is rotatable relative to the guide assembly, and a damping member is provided between the positioning base and the guide assembly to fix the position of the positioning base.

[0014] According to some embodiments of the present invention, an elastic member is provided in the limiting guide groove, and the elastic member is respectively connected to the base shell and the guide assembly to press the thread of the adjusting rod and the thread of the guide assembly toward each other.

[0015] In some embodiments of the present invention, a positioning column is provided on the inner side wall of the limiting guide groove, the guide assembly is provided with a stop platform, and both ends of the elastic member are respectively sleeved on the positioning column and the stop platform.

[0016] In some specific embodiments of the present invention, the positioning base is located at the front end of the guide assembly, the stop platform is arranged at the rear end of the guide assembly, the positioning column is located in front of the stop platform, the front and rear ends of the limiting guide groove are respectively open, the base shell is provided with a cover plate for covering the rear end of the limiting guide groove, and the adjusting rod is passed through the cover plate.

[0017] In some specific embodiments of the present invention, the rear surface of the positioning member abuts against the front surface of the cover plate, and the front end surface of the adjusting knob abuts against the rear surface of the cover plate.

[0018] In some embodiments of the present invention, the guide assembly includes: a guide block, the guide block is threadedly engaged with the adjusting rod; a pressure plate, the pressure plate is mounted on the guide block, and the stop platform is arranged on the pressure plate.

[0019] The oral CBCT according to the second aspect of the embodiment of the present invention comprises the positioning device for oral CBCT according to the first aspect of the embodiment of the present invention.

[0020] According to the oral CBCT of the embodiment of the present invention, the positioning device for oral CBCT as 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 the shooting process.

[0021] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is a stereoscopic diagram of a positioning device for oral CBCT according to an embodiment of the present invention;

[0023] Figure 2 is an exploded view of a positioning device for oral CBCT according to an embodiment of the present invention;

[0024] Figure 3 is a front view of a positioning device for oral CBCT according to an embodiment of the present invention;

[0025] Figure 4 is a right side view of a positioning device for oral CBCT according to an embodiment of the present invention;

[0026] Figure 5 is a cross-sectional view of a positioning device for oral CBCT according to an embodiment of the present invention;

[0027] Figure 6 is an exploded view of a guide assembly according to an embodiment of the present invention;

[0028] Figure 7 is a three-dimensional view of a base shell according to an embodiment of the present invention;

[0029] Figure 8 is a schematic structural diagram of a base shell according to an embodiment of the present invention.

[0030] Reference numerals:

[0031] A positioning device 10 for oral CBCT, a damping member 11, a screw 12, a copper nut 13, an elastic member 14, a base shell 100, a limiting guide groove 101, a guide protrusion 102, a positioning column 103, a cover plate 104, a deformation groove 105, an adjustment knob 200, an adjustment rod 201, a positioning member 202, a guide assembly 300, a guide groove 301, an avoidance space 302, a stop platform 303, a guide block 310, a guide nut 311, a pressure plate 320, a positioning base 400, a soft pad 401, and a guide shaft 500. DETAILED DESCRIPTION

[0032] Embodiments of the present invention are described in detail below, examples of which 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 only used to explain the present invention, and cannot be understood as limiting the present invention.

[0033] 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.

[0034] like Figure 1-Figure 8 As shown, a positioning device 10 for oral CBCT according to an embodiment of the present invention includes: a base shell 100 , an adjustment knob 200 , a guide assembly 300 and a positioning base 400 .

[0035] Specifically, the base shell 100 is provided with a limiting guide groove 101 extending in the front-to-back direction. The adjusting knob 200 is installed on the base shell 100, and the adjusting knob 200 is provided with an adjusting rod 201, and the adjusting rod 201 is provided with a positioning member 202. The guide assembly 300 is arranged in the limiting guide groove 101, and the guide assembly 300 is threadedly matched with the adjusting rod 201, and the positioning member 202 is used to limit the position of the adjusting rod 201 in the axial direction (i.e., the front-to-back direction) of the adjusting rod 201, so as to convert the rotational movement of the adjusting rod 201 into the movement of the guide assembly 300 in the limiting guide groove 101. The positioning base 400 is connected to the guide assembly 300, and the adjusting knob 200 and the positioning base 400 are respectively located at the front and rear ends of the guide assembly 300.

[0036] The positioning device 10 for oral CBCT according to the embodiment of the present invention can achieve accurate adjustment of the head pitch angle, and provide a simple and easy-to-operate physical support for the patient to remain still and stable during the imaging process.

[0037] According to some embodiments of the present invention, Figure 5 and Figure 6 As shown, one of the base shell 100 and the guide assembly 300 is provided with a guide groove 301 and the other is provided with a guide protrusion 102. The guide protrusion 102 cooperates with the guide groove 301, so that the guiding property is good, and the guide assembly 300 can be well guided to slide smoothly and steadily in the limiting guide groove 101. For example, the two guide grooves 301 are respectively provided on the left side wall and the right side wall of the guide assembly 300, and the two guide protrusions 102 are respectively provided on the left side wall and the right side wall of the limiting guide groove 101, so that the movement is more stable and smooth. Of course, the guide protrusion 102 can also be provided on the guide assembly 300 and the guide groove 301 can be provided on the base shell 100.

[0038] According to some embodiments of the present invention, Figure 5 As shown, the guide assembly 300 is provided with an escape space 302 for escaping the adjustment rod 201, so that the operation is more convenient.

[0039] According to some embodiments of the present invention, Figure 1-Figure 4 As shown, the positioning device 10 for oral CBCT further includes: a guide shaft 500, the guide shaft 500 extends in the up-down direction, and the base shell 100 is movably arranged on the guide shaft 500. In this way, the height is freely adjustable to adapt to the physiological and anatomical dimensions of different patients, so that the formed multi-freedom adjustment mechanism can adapt to the head shape and size of different patients. For example, there can be two guide shafts 500, and the two guide shafts 500 are respectively located on the left and right sides of the base shell 100, so that the movement is more stable and smooth.

[0040] According to some embodiments of the present invention, Figure 5 and Figure 6 As shown, the positioning base 400 is rotatable relative to the guide assembly 300, and a damping member 11 is provided between the positioning base 400 and the guide assembly 300 to fix the position of the positioning base 400. In this way, the positioning base 400 has a degree of rotational freedom, and can swing up and down at a certain angle relative to the hinge center and freely hover. For example, both sides of the positioning base 400 are respectively locked with the copper nuts 13 embedded in the guide assembly 300 by screws 12, and the damping member 11 is pre-pressed to form rotational damping, wherein the damping member 11 can be an elastic friction pad.

[0041] According to some embodiments of the present invention, Figure 5As shown, an elastic member 14 is provided in the limiting guide groove 101, and the elastic member 14 is respectively connected to the base shell 100 and the guide assembly 300 to press the thread of the adjustment rod 201 and the thread of the guide assembly 300 toward each other, that is, the elastic member 14 is always in a compressed state, so that the thread gap is eliminated, and its texture is improved. For example, the elastic member 14 is a spring, and there can be two elastic members 14, and the two elastic members 14 are respectively located on the left and right sides of the guide assembly 300, so that the structure is relatively reliable.

[0042] In some embodiments of the present invention, Figure 5 As shown, the inner side wall of the limiting guide groove 101 is provided with a positioning column 103, the guide assembly 300 is provided with a stop platform 303, and the two ends of the elastic member 14 are respectively sleeved on the positioning column 103 and the stop platform 303, so that it is easy to assemble and the structure is more reliable. For example, the positioning column 103 is formed on the guide protrusion 102, and the elastic member 14 is matched in the guide groove 301, so that the structure is compact and the reliability is high.

[0043] In some specific embodiments of the present invention, Figure 5 As shown, the positioning base 400 is located at the front end of the guide assembly 300, the stopper 303 is arranged at the rear end of the guide assembly 300, the positioning column 103 is located in front of the stopper 303, the front and rear ends of the limiting guide groove 101 are open respectively, the base shell 100 is provided with a cover plate 104 for covering the rear end of the limiting guide groove 101, and the adjustment rod 201 is passed through the cover plate 104. In this way, it is easy to assemble and the structure is relatively compact.

[0044] In some specific embodiments of the present invention, Figure 5 As shown, the rear surface of the positioning member 202 abuts against the front surface of the cover plate 104, and the front end surface of the adjusting knob 200 abuts against the rear surface of the cover plate 104, thereby limiting the forward and backward movement of the adjusting knob 200. For example, the positioning member 202 is a circular gasket sleeved on the adjusting rod 201.

[0045] In some embodiments of the present invention, Figure 5 and Figure 6 As shown, the guide assembly 300 includes: a guide block 310 and a pressure plate 320. The guide block 310 is threadedly matched with the adjustment rod 201. The pressure plate 320 is installed on the guide block 310, and the stop platform 303 is arranged on the pressure plate 320. In this way, the structure is compact and easy to assemble.

[0046] 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.

[0047] When the patient is taking CT or panoramic images, the positioning device 10 for oral CBCT installed on the test table is required to ensure that the patient remains stable and still during the shooting process. The positioning device 10 for oral CBCT also includes a chin positioning mechanism arranged below the base shell 100. The chin positioning mechanism mainly provides head support, and its height is adjustable. The tongue-biting transverse groove of the chin positioning mechanism provides upper and lower teeth occlusal positioning.

[0048] like Figure 5 As shown, the cover plate 104 is threadedly fixed on the base shell 100, the adjusting knob 200 passes through the cover plate 104 and is axially positioned by a circular gasket, and at the same time, the adjusting rod 201 of the adjusting knob 200 cooperates with the guide nut 311 embedded in the guide block 310. A limiting guide groove 101 is provided in the middle of the base shell 100 and passes through in the front-to-back direction. Semi-cylindrical guide protrusions 102 are provided on the opposite side walls of the limiting guide groove 101. The guide protrusions 102 cooperate with the semi-circular guide grooves 301 on the left and right side walls of the guide block 310 to form a linearly movable guide pair. In this way, the front-to-back movement of the positioning base 400 is realized by rotating the adjusting knob 200.

[0049] The coil spring is pressed between the pressure plate 320 and the positioning column 103 and is always in a compressed state, so that the thread gap is eliminated and its texture is improved. The positioning base 400 has rotational freedom. The left and right sides of the positioning base 400 are respectively locked with the copper nuts 13 embedded in the guide block 310 by screws 12, and the elastic friction pads are pre-pressed to form rotational damping, so that the positioning base 400 can swing up and down at a certain angle relative to the hinge center and hover freely. Combined with the soft pad 401 coated on the front surface of the positioning base 400, it can fit the foreheads of patients with different shapes well and provide comfortable and uniform pressure support.

[0050] The left and right side walls of the base shell 100 are provided with open arc-shaped deformation grooves 105, and the base shell 100 is an engineering plastic part, so that a certain deformation and expansion can be allowed. When the base shell 100 cooperates with the guide shaft 500, a certain pre-pressure can be generated to form a friction resistance, so that the base shell 100 can stay at any height. At the same time, when the base shell 100 is moved up and down, the deformation groove 105 can be elastically deformed without getting stuck. According to different head lengths, the operator can freely adjust the height to put the patient in a reliable and stable support state. Among them, since the carbon fiber tube has a small density, good rigidity, is not easy to deform, and has good X-ray penetration, the guide shaft 500 can be a carbon fiber tube, and the carbon fiber tube can be matched with the base plate through a fixed tube to form a complete head fixation device.

[0051] The positioning device 10 for oral CBCT according to the embodiment of the present invention can realize accurate adjustment of the pitch angle of the head, and provides a simple and easy-to-operate physical support for the patient to remain still and stable during the shooting process. At the same time, the multi-freedom adjustment mechanism can adapt to the patient's head of different shapes and sizes.

[0052] The oral CBCT according to the second embodiment of the present invention comprises the positioning device 10 for oral CBCT according to the first embodiment of the present invention.

[0053] According to the oral CBCT of the embodiment of the present invention, the positioning device 10 for oral CBCT as 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 the shooting process.

[0054] Other structures 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.

[0055] 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 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, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0056] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined 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.

[0057] In the description of the present invention, "a first feature" or "a second feature" may include one or more of the features. A first feature "above" or "below" a second feature may include direct contact between the first and second features, or may include contact between the first and second features through another feature between them instead of direct contact. A first feature "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 higher in level than the second feature.

[0058] It should be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0059] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "specific embodiments", "examples" or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0060] Although the 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 present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A positioning device for oral CBCT, characterized in that: include: A base shell, wherein the base shell is provided with a limiting guide groove; An adjusting knob, the adjusting knob being mounted on the base shell and provided with an adjusting rod, the adjusting rod being provided with a positioning member; A guide assembly, the guide assembly is arranged in the limiting guide groove and is threadedly matched with the adjusting rod, the positioning member is used to limit the position of the adjusting rod in its axial direction so as to convert the rotational movement of the adjusting rod into the movement of the guide assembly in the limiting guide groove; A positioning base is connected to the guide assembly, and the adjusting knob and the positioning base are respectively located at two ends of the guide assembly.

2. The positioning device for oral CBCT according to claim 1, characterized in that: One of the base shell and the guide assembly is provided with a guide groove and the other is provided with a guide protrusion, and the guide protrusion cooperates with the guide groove.

3. The positioning device for oral CBCT according to claim 1, characterized in that: The guide assembly is provided with an escape space for escaping the adjusting rod.

4. The positioning device for oral CBCT according to claim 1, characterized in that: Also includes: A guide shaft extends in an up-down direction, and the base shell is movably arranged on the guide shaft.

5. The positioning device for oral CBCT according to claim 1, characterized in that: The positioning base is rotatable relative to the guide assembly, and a damping member is provided between the positioning base and the guide assembly to fix the position of the positioning base.

6. The positioning device for oral CBCT according to any one of claims 1 to 5, characterized in that: An elastic member is arranged in the limiting guide groove, and the elastic member is respectively connected to the base shell and the guide assembly to press the thread of the adjusting rod and the thread of the guide assembly toward each other.

7. The positioning device for oral CBCT according to claim 6, characterized in that: The inner side wall of the position-limiting guide groove is provided with a positioning column, the guide assembly is provided with a stop platform, and the two ends of the elastic member are respectively sleeved on the positioning column and the stop platform.

8. The positioning device for oral CBCT according to claim 7, characterized in that: The positioning base is located at the front end of the guide assembly, the stop platform is arranged at the rear end of the guide assembly, the positioning column is located in front of the stop platform, the front and rear ends of the limiting guide groove are respectively open, the base shell is provided with a cover plate for covering the rear end of the limiting guide groove, and the adjusting rod is passed through the cover plate.

9. The positioning device for oral CBCT according to claim 8, characterized in that: The rear surface of the positioning member abuts against the front surface of the cover plate, and the front end surface of the adjusting knob abuts against the rear surface of the cover plate.

10. The positioning device for oral CBCT according to claim 7, characterized in that: The guide assembly comprises: A guide block, the guide block is threadedly matched with the adjusting rod; A pressure plate is installed on the guide block, and the stop platform is arranged on the pressure plate.

11. An oral CBCT, characterized in that: It comprises a positioning device for oral CBCT according to any one of claims 1-10.

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