Lifting mechanism, lifting and rotating device and oral CBCT equipment with same

Abstract

The application discloses a lifting mechanism, a lifting and rotating device and a CBCT device with the same. The lifting mechanism comprises a middle pipe, a telescopic opening and a gap adjusting threaded hole being arranged on the pipe wall of the middle pipe, a guide pipe, the guide pipe being movably sleeved outside or inside the middle pipe along the pipe length direction, a gap adjusting assembly, the gap adjusting assembly comprising a sliding block and a gap adjusting threaded part, the sliding block comprising a telescopic part and a guide part connected with each other, the guide part being located between the middle pipe and the guide pipe, the guide part being in contact with the pipe wall of the guide pipe to guide the guide pipe to move along the pipe length direction relative to the guide part, the telescopic part being telescopically matched in the telescopic opening to support the guide part, the gap adjusting threaded part being threadedly matched with the gap adjusting threaded hole, and the gap adjusting threaded part being on the guide part to adjust the tightness between the guide part and the guide pipe after rotation, and a support. The lifting mechanism can reduce shaking during lifting and improve positioning accuracy.

Description

TECHNICAL FIELD

[0001] The present application belongs to the field of medical devices, in particular to a lifting mechanism, a lifting and rotating device and an oral CBCT device with the same. BACKGROUND

[0002] In the related art, the principle of an oral CBCT device (such as an oral cone beam projection computerized tomography device) is that an X-ray generator performs a circular DR around a projection body at a low radiation dose, and then obtains a 3D image by reconstructing the data obtained by multiple digital projections around the projection body in a computer.

[0003] At present, the head support positioning device of the CBCT device in the related art has the following problems: the guiding gap is large during upward and downward movement, the shaking is obvious, the positioning is inaccurate, and the shooting accuracy is affected. SUMMARY

[0004] The present application aims to solve at least one of the technical problems existing in the prior art. To this end, the present application provides a lifting mechanism for an oral CBCT device to adjust the guiding gap and reduce shaking, thereby improving the positioning accuracy.

[0005] The present application also aims to provide a lifting and rotating device and an oral CBCT device with the above lifting mechanism.

[0006] The lifting mechanism for an oral CBCT device according to an embodiment of the present application comprises: a middle pipe, the pipe wall of the middle pipe being provided with an expansion opening and a gap adjusting threaded hole; a guide pipe, the guide pipe being movably sleeved outside or inside the middle pipe along the pipe length direction; a gap adjusting assembly, the gap adjusting assembly comprising a sliding block and a gap adjusting threaded member, the sliding block comprising an expansion part and a guide part connected together, the guide part being located between the middle pipe and the guide pipe, the guide part being in contact with the pipe wall of the guide pipe to guide the guide pipe to move along the pipe length direction relative to the guide part, the expansion part being telescopically fitted in the expansion opening to support the guide part, the gap adjusting threaded member being threadedly fitted with the gap adjusting threaded hole, and the gap adjusting threaded member being on top of the guide part to adjust the tightness between the guide part and the guide pipe after rotation; and a support member, the support member being connected to the middle pipe.

[0007] The lifting mechanism of the oral CBCT device according to the embodiment of the present application is characterized in that the middle pipe and the guide pipe are matched through the guide part of the sliding block to guide the sliding of the guide pipe along the length direction of the pipe. The distance between the guide part and the guide pipe is adjusted by the gap adjusting screw, and the tightness between the guide part and the guide pipe is adjusted by rotating the gap adjusting screw. When assembled or stored, the gap between the guide part and the guide pipe is adjusted to be large, and the load of the gap adjusting screw is reduced. When used, the gap between the guide part and the guide pipe is adjusted to be small or even no gap, so that the guide pipe does not shake when sliding along the guide part. Moreover, when the gap adjusting screw is rotated, the sliding block moves in the telescopic opening of the middle pipe through the telescopic part, thereby ensuring the overall reliability and stability. When used, the lifting mechanism can reduce the shaking during lifting, maintain the positioning accuracy during long-term use, and improve the shooting accuracy of the oral CBCT device.

[0008] In some embodiments, the middle pipe and the guide pipe are polygonal pipes with consistent shapes, and the pipe wall between adjacent side edges of the polygonal pipe is a side wall; the number of side walls of each polygonal pipe is at least three; the gap adjusting assembly includes a plurality of sliding blocks, and at least one sliding block is connected to each side wall of the middle pipe, and the gap adjusting screw is matched with at least one sliding block.

[0009] In some embodiments, the middle pipe and the guide pipe are square pipes, and each has four side walls; the sliding blocks on only two adjacent side walls are connected with the gap adjusting screw.

[0010] In some embodiments, the guide part is a flat plate, and the gap adjusting screw is arranged on the sliding block connected with the gap adjusting screw hole in multiple numbers, and the multiple gap adjusting screws are arranged at intervals around the telescopic part.

[0011] In some embodiments, the guide part is a square flat plate, the telescopic part is a square block with a size smaller than the guide part, the telescopic opening is a corresponding square opening, the gap adjusting screw is arranged on the sliding block connected with the gap adjusting screw hole in four numbers, and is arranged corresponding to the four corners of the guide part.

[0012] In some embodiments, the support member is a support pipe, the support pipe is sleeved outside the middle pipe or arranged in the middle pipe, and the middle pipe and the support pipe are fixedly connected.

[0013] In some embodiments, the surface of the middle pipe facing the support pipe includes a contact matching surface and a spacing surface. The contact matching surface is annular and in surface contact with the pipe wall of the support pipe. The spacing surface is connected with the contact matching surface and is arranged in a spaced manner with the pipe wall of the support pipe. The telescopic opening is located on the contact matching surface and the spacing surface.

[0014] In some embodiments, when the support tube is sleeved outside the through pipe, a tool avoiding hole is arranged on the tube wall of the support tube corresponding to at least part of the pitch adjusting threaded hole.

[0015] In some embodiments, the lifting mechanism further comprises an end cover which is detachably connected to the top of the support tube and surrounds the guide pipe, and the end cover covers at least part of the tool avoiding hole.

[0016] In some embodiments, the lifting mechanism further comprises a telescopic driving assembly arranged in the support tube or the guide pipe, one end of the telescopic driving assembly is provided with a rotatable first lug for connecting one of the guide pipe and the support tube, and the other end of the telescopic driving assembly is provided with a rotatable second lug for connecting the other of the guide pipe and the support tube.

[0017] In some embodiments, the telescopic driving assembly comprises a push rod motor, the body of the push rod motor is connected to the second lug through a pin shaft, and the motor shaft of the push rod motor is connected to the first lug through a pin shaft.

[0018] The lifting and rotating device of the oral CBCT equipment according to the embodiment of the present application comprises the lifting mechanism of the oral CBCT equipment according to the above-mentioned embodiments, the lifting mechanism is vertically arranged, the through pipe is connected to the upper end of the support member, and the guide pipe is telescopic from the upper end of the through pipe; the rotating mechanism comprises a fixed disc, a rotating disc and a jaw support connecting member connected to the rotating disc, the fixed disc is connected to the upper end of the guide pipe, and the rotating disc is rotationally connected to the fixed disc.

[0019] The lifting and rotating device of the oral CBCT equipment according to the embodiment of the present application reduces the shaking during lifting by arranging the above-mentioned lifting mechanism, improves the positioning accuracy of the jaw support connecting member, and improves the shooting accuracy of the oral CBCT equipment.

[0020] In some embodiments, the rotating mechanism comprises an angle limiting component, which comprises: a first limiting part, the first limiting part is at least one, the first limiting part connects one of the fixed disc and the rotating disc; a second limiting part, the second limiting part connects the other of the fixed disc and the rotating disc, and the second limiting part is provided with two corresponding to each first limiting part; the rotating disc has a closed position and an open position, when the first limiting part abuts against one of the two corresponding second limiting parts in the closed position, and when the first limiting part abuts against the other of the two corresponding second limiting parts in the open position.

[0021] In some embodiments, the first limiting part is fixed relative to the rotating disc, and the second limiting part is fixed relative to the fixed disc; one of the first limiting part and the second limiting part is provided with a magnetic attraction part, and the magnetic attraction part attracts the other one of the first limiting part and the second limiting part in the closed position.

[0022] In some embodiments, the rotating mechanism further comprises a stop disc connected above the fixed disc, the rotating disc is clamped between the stop disc and the fixed disc, the first limiting part is connected to the bottom of the stop disc, and the second limiting part is arranged on the rotating disc.

[0023] In some embodiments, the bottom of the stop disc is provided with a stop shaft, the bottom of the stop shaft is connected to the fixed disc; the rotating disc comprises an inner sleeve and an outer sleeve, the inner sleeve is sleeved outside the stop shaft, the outer sleeve is sleeved outside the inner sleeve, the first limiting part is connected between the inner sleeve and the outer sleeve; and the second limiting part is located between the inner sleeve and the outer sleeve.

[0024] In some embodiments, the lifting and rotating device further comprises a power-off protection detector arranged on the fixed disc, the power-off protection detector is used for detecting the position of the rotating disc to send a protection signal when the rotating disc leaves the closed position.

[0025] In some embodiments, the fixed disc is provided with a mounting hole, the bottom of the rotating disc is provided with a detection hole, and the power-off protection detector is mounted in the mounting hole; the mounting hole is opposite to the detection hole in the closed position, and the bottom of the rotating disc blocks the mounting hole after leaving the closed position.

[0026] The oral CBCT equipment according to the embodiment of the present application comprises the lifting and rotating device of the oral CBCT equipment according to the above-mentioned embodiments.

[0027] The oral CBCT equipment according to the embodiment of the present application reduces shaking in the lifting process by arranging the lifting mechanism, improves the positioning accuracy of the jaw support connecting piece, and improves the shooting accuracy of the oral CBCT equipment.

[0028] Additional aspects and advantages of the present application will be in part apparent and in part pointed out hereinafter. BRIEF DESCRIPTION OF DRAWINGS

[0029] The above and / or additional aspects and advantages of the present application will become apparent and be readily appreciated from the following description, including the appended drawings.

[0030] Figure 1This is a schematic diagram of the structure of the oral CBCT device in an embodiment of the present invention when the lifting and rotating device is in the closed position;

[0031] Figure 2 This is a comparison diagram of the changes of the oral CBCT device in the open and closed positions of the lifting and rotating device in an embodiment of the present invention (the two lifting and rotating devices in the figure are the lifting and rotating devices in the above two positions respectively);

[0032] Figure 3 This is a comparison diagram of the changes in the lifting and rotating device from the open position to the closed position in an embodiment of the present invention;

[0033] Figure 4 This is a schematic diagram of the lifting and rotating device in an embodiment of the present invention;

[0034] Figure 5 This is an exploded view of the lifting and rotating device in an embodiment of the present invention;

[0035] Figure 6 This is a schematic diagram of some components of the lifting mechanism according to an embodiment of the present invention;

[0036] Figure 7 yes Figure 6 An exploded view of the portion shown;

[0037] Figure 8 This is a structural diagram of another part of the lifting mechanism according to an embodiment of the present invention;

[0038] Figure 9 yes Figure 8 An exploded view of the portion shown;

[0039] Figure 10 This is an exploded view of the lifting mechanism according to an embodiment of the present invention;

[0040] Figure 11 yes Figure 10 The assembly effect diagram of the lifting mechanism shown;

[0041] Figure 12 This is a schematic diagram of the rotating mechanism according to an embodiment of the present invention;

[0042] Figure 13 This is an exploded view of the rotating mechanism according to an embodiment of the present invention;

[0043] Figure 14 This is a schematic diagram of the stop disc according to an embodiment of the present invention;

[0044] Figure 15 This is a schematic diagram of the fixed disk and power failure protection detector according to an embodiment of the present invention;

[0045] Figure 16 This is a schematic diagram of the turntable according to an embodiment of the present invention;

[0046] Figure 17 is the installation schematic diagram of the rotating disc, the shaft sleeve and the fixed disc of the embodiment of the present application;

[0047] Figure 18 is the internal schematic diagram of the rotating mechanism in the open position of the embodiment of the present application;

[0048] Figure 19 is the internal schematic diagram of the rotating mechanism in the closed position of the embodiment of the present application.

[0049] Reference signs:

[0050] the oral CBCT device 1000,

[0051] the lifting rotating device 100,

[0052] the lifting mechanism 1,

[0053] the middle through pipe 11, the telescopic opening 111, the gap adjusting screw hole 112, the middle through hole 113, the contact matching surface 114, the spacing surface 115, the middle through hole 116,

[0054] the guide pipe 12, the connecting disc 121, the guide pipe connecting hole 122,

[0055] the gap adjusting assembly 13, the sliding block 131, the telescopic part 1311, the guide part 1312, the gap adjusting screw 133,

[0056] the end cover 14, the end cover hole 141, the top ring plate 142, the outer ring plate 144,

[0057] the support 15, the tool avoiding hole 151, the support hole 152,

[0058] the telescopic driving assembly 16, the push rod motor 161, the first ear seat 162, the second ear seat 163, the pin shaft 164,

[0059] the installation bottom plate 17,

[0060] the rotating mechanism 2,

[0061] the fixed disc 21, the installation hole 211, the square groove 212, the shaft rotating groove 213, the shaft fixed connecting hole 214, the fixed hole 215, the fixed hole 216,

[0062] the rotating disc 22, the inner sleeve 221, the outer sleeve 222, the connecting pipe 223, the bottom ring 224, the detection hole 225,

[0063] the angle limiting assembly 23, the first limiting part 231, the second limiting part 232, the magnetic attraction part 233,

[0064] the power-off protection detector 241, the installation seat 242, the first installation part 2421, the second installation part 2422,

[0065] stop disc 25, stop shaft 251, square shaft 2511, shaft fixing threaded hole 2512,

[0066] jaw support connecting piece 26,

[0067] shaft sleeve 27,

[0068] jaw support 3,

[0069] seat 200, U-shaped arm 300. DETAILED DESCRIPTION

[0070] Embodiments of the present application are described below in detail with reference to the accompanying drawings, in which the same or similar components or components having the same or similar functions are denoted by the same or similar reference numerals throughout. The embodiments described below by reference to the accompanying drawings are exemplary and are intended only to explain the present application, and are not to be construed as limiting the present application.

[0071] In the description of the present application, it should be understood that the terms "center", "length", "width", "thickness", "upper", "lower", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be construed as limiting the present application. In addition, features defined with "first", "second" can be explicitly or implicitly include one or more of the features. In the description of the present application, unless otherwise specified, the meaning of "a plurality of" is two or more.

[0072] In the description of the present application, it should be noted that unless otherwise specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be the communication between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0073] The oral CBCT device 1000 according to the embodiments of the present application is described below with reference to the accompanying drawings.

[0074] In some embodiments, as Figure 1 and Figure 2As shown, the oral CBCT device 1000 comprises a seat 200, and a C-shaped arm 300 is arranged above the seat 200, and the C-shaped arm 300 can rotate to shoot the human head. Here, the structure and principle for shooting images on the C-shaped arm 300 are prior art, and details are not repeated here. Of course, in some schemes in the present application, the oral CBCT device 1000 does not arrange the seat 200, and the patient is detected in a standing posture.

[0075] The oral CBCT device 1000 is used for image shooting of the oral dental and maxillofacial surface, and therefore, the jaw support 3 is needed to position the head so that the image component can be accurately shot.

[0076] In the scheme of the present application, the device for supporting the jaw support 3 is a lifting and rotating device 100. As shown in Figure 2 , the lifting and rotating device 100 has switchable open and closed positions. In the open position, the lifting and rotating device 100 drives the jaw support 3 to avoid the front side of the seat 200, so as to facilitate the patient to sit on the seat 200. In the closed position, the lifting and rotating device 100 drives the jaw support 3 to rotate to the front side of the seat 200 to support the head of the patient. For the convenience of understanding, the components are shown in the open position in A, and in the closed position in B.

[0077] As shown in Figure 3 , the lifting and rotating device 100 comprises a lifting mechanism 1 and a rotating mechanism 2, the rotating mechanism 2 is connected to the lifting mechanism 1, and the jaw support 3 is installed on the rotating mechanism 2. The lifting of the lifting mechanism 1 can adjust the height of the jaw support 3, so that the height of the jaw support 3 can adapt to the needs of different patient heights. The rotating mechanism 2 can drive the rotation of the jaw support 3, so that the jaw support 3 can be switched at different positions.

[0078] The lifting mechanism 1 of the oral CBCT device 1000 according to the embodiment of the present application comprises: a middle pipe 11, a guide pipe 12, a support 15, and a gap adjusting assembly 13, the support 15 is connected to the middle pipe 11, and the support 15 is the support basis of the lifting mechanism 1. Figure 4 Figure 5 As shown in

[0079] In the scheme of the present application, as shown in Figure 5 , the guide pipe 12 is movably arranged in the middle pipe 11 along the pipe length direction, that is, the middle pipe 11 is sleeved outside the guide pipe 12. Alternatively, the guide pipe 12 is movably sleeved outside the middle pipe 11 along the pipe length direction.

[0080] As shown in Figure 6 and Figure 7 ​As shown, the gap adjusting assembly 13 comprises a slider 131 and a gap adjusting screw 133. The slider 131 comprises a telescopic part 1311 and a guiding part 1312 connected to each other. The guiding part 1312 is located between the through pipe 11 and the guide pipe 12. The guiding part 1312 is in contact with the wall of the guide pipe 12 to guide the movement of the guide pipe 12 along the length direction of the pipe.

[0081] The wall of the through pipe 11 is provided with a telescopic opening 111 and a gap adjusting screw hole 112. The telescopic part 1311 is telescopically fitted in the telescopic opening 111 to support the guiding part 1312. The gap adjusting screw 133 is screwed with the gap adjusting screw hole 112 and the top of the gap adjusting screw 133 is in contact with the guiding part 1312. After rotating the gap adjusting screw 133, the tightness between the guiding part 1312 and the guide pipe 12 is adjusted. When the gap adjusting screw 133 is rotated in one direction, the tightness between the guiding part 1312 and the guide pipe 12 is adjusted to be loose. When the gap adjusting screw 133 is rotated in the other direction, the tightness between the guiding part 1312 and the guide pipe 12 is adjusted to be tight. Since the telescopic part 1311 and the guiding part 1312 are connected to each other, when the gap adjusting screw 133 is rotated to adjust, the telescopic part 1311 of the slider 131 is always fitted on the telescopic opening 111 of the through pipe 11, so that the telescopic direction of the slider 131 is guided and limited.

[0082] Here, the extension directions of the telescopic opening 111 and the gap adjusting screw hole 112 can be parallel, for example, both are perpendicular to the length direction of the guide pipe 12. The extension directions of the telescopic opening 111 and the gap adjusting screw hole 112 can also be at a certain angle, for example, the axis of the telescopic opening 111 is deviated upward by 3 degrees relative to the horizontal plane, and the axis of the gap adjusting screw hole 112 is deviated downward by 3 degrees relative to the horizontal plane, which can also realize the scheme of the present application.

[0083] According to the lifting mechanism 1 of the oral CBCT device 1000, the guiding part 1312 of the slider 131 is fitted between the through pipe 11 and the guide pipe 12 to guide the sliding movement of the guide pipe 12 along the length direction of the pipe. By setting the gap adjusting screw 133 which can adjust the distance between the guiding part 1312 and the through pipe 11, the tightness between the guiding part 1312 and the guide pipe 12 can be adjusted by rotating the gap adjusting screw 133. In this way, the gap between the guiding part 1312 and the guide pipe 12 can be adjusted to be larger during assembly or storage, which facilitates assembly and reduces the load of the gap adjusting screw 133. During use, the gap between the guiding part 1312 and the guide pipe 12 can be adjusted to be smaller or even no gap, which reduces the shaking of the guide pipe 12 during extension.

[0084] And when the pitch adjusting screw 133 rotates to adjust the pitch, the slider 131 moves in the expansion opening 111 of the through pipe 11 through the expansion part 1311, thereby ensuring the overall reliability and stability. When the lifting mechanism 1 is used, the shaking during lifting can be reduced, the positioning accuracy during long-term use can be maintained, and the shooting accuracy of the oral CBCT equipment 1000 can be improved.

[0085] In some embodiments, as shown in Figure 6 and Figure 7 , the through pipe 11 and the guide pipe 12 are polygonal pipes with consistent shapes, and the pipe wall between adjacent side edges of the polygonal pipe is an edge wall. The number of edge walls of each polygonal pipe is at least three. For example, the through pipe 11 and the guide pipe 12 are both triangular pipes, and the through pipe 11 and the guide pipe 12 each have three edge walls. Or the through pipe 11 and the guide pipe 12 are both square pipes, and the through pipe 11 and the guide pipe 12 each have four edge walls. Or the through pipe 11 and the guide pipe 12 are both pentagonal pipes, and the through pipe 11 and the guide pipe 12 each have five edge walls. And so on.

[0086] In some embodiments, as shown in and

[0087] , the through pipe 11 and the guide pipe 12 are square pipes, and each has four edge walls. Only the sliders 131 on two adjacent edge walls are connected to the pitch adjusting screw 133.

[0088] In some embodiments, as shown in Figure 6 and Figure 7 , the through pipe 11 and the guide pipe 12 are square pipes, and each has four edge walls. Only the sliders 131 on two adjacent edge walls are connected to the pitch adjusting screw 133. Figure 6 For example, in the orientation shown in , of the four edge walls, the sliders 131 on the front edge wall and the right edge wall are adjusted by the pitch adjusting screw 133. The sliders 131 on the left edge wall and the back edge wall are not adjusted by the pitch adjusting screw 133. In this way, the guide pipe 12 can be adjusted in two horizontal directions without adjusting both sliders 131 in the same direction, thereby reducing the difficulty of adjustment.

[0089] Of course, the present application can be designed in more ways. For example, in some embodiments, the through pipe 11 and the guide pipe 12 are square pipes, and only the sliders 131 on one edge wall are connected to the pitch adjusting screw 133. For example, when the number of edge walls of the through pipe 11 and the guide pipe 12 changes, the sliders 131 connected to the pitch adjusting screw 133 can be selected.

[0090] In some embodiments, the slider 131 is connected with at least two pitch adjusting screws 133. Optionally, the at least two pitch adjusting screws 133 are arranged in a horizontal direction, so that the angle of the guide pipe 12 relative to the horizontal plane can be adjusted by the pitch adjusting screws 133. Optionally, the at least two pitch adjusting screws 133 are arranged in a vertical direction, so that the angle of the guide pipe 12 relative to the vertical plane can be adjusted by the pitch adjusting screws 133.

[0091] In some embodiments, as shown in Figure 6 and Figure 7 , the guide part 1312 is a flat plate, and the guide part 1312 has a large contact area with the guide pipe 12, which can improve the stability of the extension and retraction of the guide pipe 12. The pitch adjusting screws 133 on the slider 131 connected with the pitch adjusting screw holes 112 are arranged in multiple, and the multiple pitch adjusting screws 133 are arranged around the extension and retraction part 1311, so that the adjustment effect of the guide pipe 12 is more significant.

[0092] In some embodiments, as shown in Figure 6 and Figure 7 , the guide part 1312 is a square flat plate, and the extension and retraction part 1311 is a square block with a size smaller than the guide part 1312, and the extension and retraction opening 111 is a corresponding square opening, which reduces the processing difficulty and is beneficial to the parallelism between some surfaces and the perpendicularity between some surfaces.

[0093] The pitch adjusting screws 133 on the slider 131 connected with the pitch adjusting screw holes 112 are arranged in four, and correspond to the four corners of the guide part 1312.

[0094] It can be understood that the shape of the guide part 1312 can also be changed, and the assembly part of the guide pipe 12 can be adaptively changed. According to the different shapes of the guide part 1312, the guide part 1312 and the guide pipe 12 can be in surface contact, and the guide part 1312 and the guide pipe 12 can also be in line contact, which is not limited here.

[0095] In some embodiments, the support member 15 is a support pipe, which is sleeved outside or arranged inside the middle pipe 11, and the middle pipe 11 is fixedly connected with the support pipe.

[0096] When the support member 15 is a pipe body, the positions among the middle pipe 11, the guide pipe 12 and the support pipe can be changed and combined to form diversified designs. In order to adapt to the above changes, the corresponding structures on the three pipe bodies can be adaptively adjusted. The mounting relationship between the guide pipe 12 and the support member 15 and the middle pipe 11 can be interchangeable, for example, the guide pipe 12 is a pipe mounted on the outside, and the support member 15 is a pipe mounted on the inside.

[0097] For example, when the support tube is sleeved outside the middle tube 11 and the middle tube 11 is sleeved outside the guide tube 12, the adjusting gap threaded member 133 is installed on the middle tube 11. At this time, as shown in Figure 6 and Figure 5 , the head of the adjusting gap threaded member 133 is outward, and the tube wall of the support tube is provided with a tool avoiding hole 151 corresponding to at least part of the adjusting gap threaded hole 112. In this way, the adjusting gap threaded member 133 corresponding to the tool avoiding hole 151 can be rotated by a tool from outside the support tube to adjust the tightness of the guide tube 12. In some schemes, when the support tube is sleeved outside the middle tube 11 and the middle tube 11 is sleeved outside the guide tube 12, but the upper end of the support tube is lower than the adjusting gap threaded member 133, the tool avoiding hole 151 can not be provided.

[0098] For another example, the guide tube 12 is sleeved outside the middle tube 11, and in order to adjust the guide tube 12 at any position during the expansion and contraction process, an avoiding groove (not shown in the figure) corresponding to at least part of the adjusting gap threaded hole 112 can be provided on the guide tube 12.

[0099] In some schemes, as shown in Figure 7 , the adjusting gap threaded member 133 is a cylindrical jackscrew. In some schemes, when the guide tube 12 is sleeved outside the middle tube 11, the tail of the adjusting gap threaded member 133 is provided with external threads to connect the adjusting gap threaded hole 112, and the head of the adjusting gap threaded member 133 is provided with a notch so that a tool such as a screwdriver can be inserted into the notch. At this time, a circular plate can be provided on the peripheral wall of the adjusting gap threaded member 133, and the circular plate is pressed against the guide portion 1312. When the guide portion 1312 is rotated outward, the guide portion 1312 is pressed outward against the inner wall of the guide tube 12.

[0100] In some embodiments, as shown in Figure 6 and Figure 5 , the surface of the middle tube 11 facing the support tube includes a contact matching surface 114 and a spacing surface 115. The contact matching surface 114 is annular and matches the surface of the support tube. The spacing surface 115 is connected to the contact matching surface 114 and is spaced apart from the tube wall of the support tube. The expansion opening 111 is located on the contact matching surface 114 and the spacing surface 115.

[0101] Through the provision of the contact matching surface 114 and the spacing surface 115, the area of the sliding block 131 matched with the guide tube 12 can be ensured to be large enough, and the area of the relative high-precision machining of the matching surface of the middle tube 11 and the support 15 can be reduced, thereby reducing the cost to a certain extent and increasing the reliability of the design.

[0102] The contact matching surface 114 is an annular surface, which can comprehensively limit the central passage 11 in the direction perpendicular to the length direction of the tube. The arrangement of the contact matching surface 114 and the spacing surface 115 can be flexibly set, for example, the spacing surface 115 can be a section, and the spacing surface 115 can also be set as two sections.

[0103] The setting of the contact matching surface 114 can limit the separation or shaking of the central passage 11 and the support tube in the direction perpendicular to the matching surface. In addition, the central passage 11 and the guide tube 12 are pressed by the gap adjusting screw 133, which at least limits the displacement of the central passage 11 and the support tube in the sliding direction of the guide tube 12.

[0104] In the above embodiment, as shown in Figure 7 The guide tube 12 and the support 15 can be processed by the existing tubular profile, the contact matching surface 114 is the outer side surface of the central passage 11, and the inner side surface of the support 15 has a corresponding contact surface, and the processing precision requirement is relatively high. The spacing surface 115 is inwardly contracted relative to the contact matching surface 114, and does not participate in the matching of the surfaces, and the processing precision requirement is relatively low.

[0105] Specifically, the central passage 11 and the support 15 need to be fixedly connected. The central passage 11 is provided with a central passage hole 113, and the support 15 is provided with a support hole 152, which are oppositely arranged and can be connected by fasteners such as screws.

[0106] In some embodiments, as shown in Figure 5 and Figure 8 The lifting mechanism 1 further comprises an end cover 14, which is detachably connected to the top of the support tube and surrounds the guide tube 12, and the end cover 14 covers at least part of the tool avoiding hole 151. In this way, the appearance of the lifting mechanism 1 can be improved. In addition, the end cover 14 can shield the gap adjusting screw 133 from falling out.

[0107] Specifically, the end cover 14 can be connected with the support tube or the central passage 11. For example, as shown in Figure 9 The end cover 14 is provided with an end cover hole 141, and the top of the central passage 11 is provided with a central passage hole 116, which are oppositely arranged and can be connected by fasteners such as screws. At this time, the central passage hole 116 can be set as a threaded hole.

[0108] Further, the end cover 14 comprises a top ring plate 142 and an outer ring plate 144, the top ring plate 142 is located at the top of the central passage 11 and the support tube, and the outer ring plate 144 is connected to the outer edge of the top ring plate 142, and then can cover the gap adjusting screw 133 at the top. The shape of the end cover 14 is matched with the shape of the central passage 11 and the support tube.

[0109] In some specific embodiments, as shown in Figure 9As shown, the end of the guide tube 12 is provided with a connecting disc 121, and the guide tube 12 is provided with the connecting disc 121 for connecting the rotating mechanism 2.

[0110] In the above embodiment, the slider 131 is made of plastic material, and the guide tube 12 is made of metal material, so as to reduce the friction, improve the service life, and use effect.

[0111] In some embodiments, the lifting mechanism 1 further comprises a telescopic driving assembly 16, which is arranged in the support tube or the guide tube 12. One end of the telescopic driving assembly 16 is provided with a rotatable first lug 162, and the other end is provided with a rotatable second lug 163. One of the first lug 162 and the second lug 163 is connected to the guide tube 12, and the other is connected to the support tube.

[0112] In some embodiments, as shown in Figure 10 and Figure 11 , the telescopic driving assembly 16 is arranged in the support tube. One end of the telescopic driving assembly 16 is provided with a rotatable first lug 162 for connecting the guide tube 12, and the other end is provided with a rotatable second lug 163 for connecting the support tube. In this way, when the telescopic driving assembly 16 is telescoped, the rotatable first lug 162 and the second lug 163 are used for adaptive adjustment to avoid the phenomenon of being stuck and reduce the assembly difficulty.

[0113] Specifically, the telescopic driving assembly 16 comprises a push rod motor 161. The body of the push rod motor 161 is connected to the second lug 163 through a pin shaft 164, and the motor shaft of the push rod motor 161 is connected to the first lug 162 through the pin shaft 164. The arrangement of the push rod motor 161 makes the lifting mechanism 1 adopt the electric lifting mode, which is convenient and fast, and has high adjustment precision of lifting amplitude.

[0114] Further, as shown in Figure 11 , the lifting mechanism 1 further comprises a mounting bottom plate 17 connected to the bottom of the support tube, and the second lug 163 is fixed on the mounting bottom plate 17 by screws or the like.

[0115] According to the rotating mechanism 2 of the embodiment of the present application, as shown in Figure 12 and Figure 13 , it comprises a fixed disc 21 and a rotating disc 22. The rotating disc 22 is used for connecting a jaw support connecting piece 26, and the jaw support 3 can be installed on the jaw support connecting piece 26. When the jaw support connecting piece 26 is manually pushed or electrically driven to rotate, the rotating disc 22 rotates relative to the fixed disc 21, so as to switch the rotating disc 22 between the open position and the closed position. The rotating disc 22 takes the fixed disc 21 as the support, which can improve the rotation stability.

[0116] Specifically, the fixed disc 21 is connected to the guide pipe 12, so that the guide pipe 12 can drive the rotating mechanism 2 to move up and down when the guide pipe 12 is extended and retracted relative to the middle pipe 11.

[0117] Further, the telescopic driving assembly 16 is connected to the fixed disc 21, so as to reduce the difficulty of mounting the guide pipe 12.

[0118] As shown in the embodiment shown in Figure 15 , the bottom of the fixed disc 21 is provided with a first fixing hole 215 and a second fixing hole 216. The first fixing hole 215 can be fixedly connected to the first lug 162 by a fastener such as a screw, and the second fixing hole 216 can be fixedly connected to the guide pipe connecting hole 122 on the connecting disc 121 at the top of the guide pipe 12 by a fastener such as a screw. The first fixing hole 215 and the second fixing hole 216 can be threaded holes and can be mounted from the bottom.

[0119] In some embodiments, as shown in Figure 13 and Figure 14 , the rotating mechanism 2 further comprises a stop disc 25, the stop disc 25 is connected to the fixed disc 21, and the rotating disc 22 is clamped between the stop disc 25 and the fixed disc 21. It can be said that the rotating disc 22 is also rotatably connected to the stop disc 25. Clamping the rotating disc 22 between the stop disc 25 and the fixed disc 21 can constrain the rotating disc 22 from both ends of the rotating disc 22, improve the stability of the rotating disc 22, and reduce the shaking of the rotating disc 22 when rotating. Moreover, such arrangement not only facilitates assembly, but also encapsulates the matching position, reducing the possibility of impurities entering the matching surface.

[0120] In some embodiments, the rotating mechanism 2 further comprises an angle limiting assembly 23, the angle limiting assembly 23 comprises a first limiting part 231 and a second limiting part 232.

[0121] The first limiting part 231 is at least one, the first limiting part 231 is connected to one of the stop disc 25 and the rotating disc 22, and the second limiting part 232 is connected to the other one of the stop disc 25 and the rotating disc 22. The second limiting part 232 is provided with two corresponding to each first limiting part 231. The rotating disc 22 has a closed position and an open position, and in the closed position, the first limiting part 231 abuts against one of the two corresponding second limiting parts 232, and in the open position, the first limiting part 231 abuts against the other one of the two corresponding second limiting parts 232.

[0122] Taking one first limiting part 231 as an example, at this time the second limiting part 232 is two, and the central angle between the two second limiting parts 232 relative to the axis of the rotating disc 22 is substantially consistent with the rotation amplitude of the rotating disc 22.

[0123] There are also some settings, the first limiting part 231 is two or more, the second limiting part 232 can be flexible settings. Although the first limiting part 231 can be one, when the first limiting part 231 is two or more, the rotation disc 22 can increase the constraint limit in the open position and the closed position, improve the reliability.

[0124] Here it needs to be explained that each first limiting part 231 corresponds to two second limiting parts 232. Different first limiting parts 231 can not share the second limiting part 232, or can share the second limiting part 232. For example, when the first limiting part 231 is two, the second limiting part 232 can be three. When different first limiting parts 231 share the second limiting part 232, the number of second limiting parts 232 can be saved.

[0125] When the first limiting part 231 is at least two, it can be distributed along the radial direction of the rotation disc 22, or it can be distributed along the circumferential direction of the rotation disc 22, which is not limited here.

[0126] Some embodiments, as shown in Figure 16 , the first limiting part 231 is two and is symmetrically distributed with respect to the center of the rotation axis of the rotation disc 22, as shown in Figure 14 , the second limiting part 232 is two and is symmetrically distributed with respect to the center of the rotation axis of the rotation disc 22, as shown in Figure 18 and Figure 19 , the two first limiting parts 231 and the two second limiting parts 232 are alternately distributed along the circumferential direction. In this way, the two first limiting parts 231 share the two second limiting parts 232, one of the first limiting parts 231 is limited between the two second limiting parts 232, and the other first limiting part 231 is limited between the other side of the two second limiting parts 232. In this way, the rotation disc 22 can be reliably stopped in the open position and the closed position, and the full angle space of the rotation disc 22 can be maximized.

[0127] In some embodiments, at least one of the first limiting part 231 and the second limiting part 232 is provided with a magnetic attraction part 233, which keeps the first limiting part 231 and the second limiting part 232 attracted in the closed position.

[0128] Here, the magnetic attraction part 233 can be provided only on the first limiting part 231, or only on the second limiting part 232, or on both the first limiting part 231 and the second limiting part 232.

[0129] The rotating mechanism 2 of the oral CBCT device 1000 according to the embodiment of the present application can stop the rotating disc 22 when rotating to the open position or the closed position through mutual limiting of the first limiting part 231 and the second limiting part 232, so as to avoid that the components connected with the rotating disc 22 injure the user. Especially, the magnetic attraction part 233 is arranged to enable the rotating disc 22 to be kept at the closed position when rotating to the closed position, so as to accurately position the rotating disc 22 at the closed position and avoid shaking at the closed position, thereby improving the shooting accuracy of the oral CBCT device 1000. Moreover, the rotating disc 22 is constrained by the magnetic attraction force at the closed position, if the rotating disc 22 rotates due to the user's mistake, the user can feel the change of the magnetic attraction force when the user pushes the rotating disc 22 by mistake, so as to remind the user.

[0130] Here, the structure of the magnetic attraction part 233 is not limited, and the magnetic attraction part 233 can be a separate part and be fixed on the first limiting part 231 and the second limiting part 232. In some schemes, the magnetic attraction part 233 and the first limiting part 231 are an integral part, for example, a magnet is used as the first limiting part 231. Or the magnetic attraction part 233 and the second limiting part 232 are an integral part, for example, a magnet is used as the second limiting part 232.

[0131] Specifically, the magnetic attraction part 233 can be fixed on the surface of the first limiting part 231 and the second limiting part 232, or can be embedded in the inside, which is not limited here. The magnetic attraction part 233 can be a magnet, magnetic powder, or an electromagnet, etc.

[0132] In some embodiments, the first limiting part 231 is fixed relative to the rotating disc 22, that is, the first limiting part 231 rotates with the rotating disc 22. The second limiting part 232 is fixed relative to the stop disc 25, and the second limiting part 232 can be fixedly connected on the stop disc 25, or can be fixedly connected on the fixed disc 21.

[0133] As shown in FIG. 2, the two second limiting parts 232 are arranged on the same side in the circumferential direction, and the magnetic attraction part 233 is arranged on the second limiting part 232. Figure 19 In this way, the two magnetic attraction parts 233 respectively stick to the two first limiting parts 231 at the closed position, so that the maximum attraction force can be achieved between the first limiting part 231 and the second limiting part 232 at the closed position, and the rotating mechanism 2 is most stable at the closed position.

[0134] As shown in FIG. 3, the two second limiting parts 232 are arranged on the same side in the circumferential direction, and the magnetic attraction part 233 is arranged on the second limiting part 232. Figure 18 In this way, the attraction force between the magnetic attraction part 233 and the first limiting part 231 is reduced due to the interval of the second limiting part 232 at the open position, so as to facilitate the closing operation.

[0135] Specifically, the first limiting part 231 is connected on the bottom of the stop disc 25, and the second limiting part 232 is arranged on the rotating disc 22, so as to facilitate the assembly.

[0136] Further, the suction strength can be adjusted by the number of the magnetic suction parts 233 (such as magnets) and the size of the contact surface, and the plurality of magnetic suction parts 233 can be arranged along the circumference and / or the radius of the rotating disc 22.

[0137] In some embodiments, the stop disc 25 is provided with a stop shaft 251, the end of the stop shaft 251 is connected to the fixed disc 21, and the rotating disc 22 comprises an inner sleeve 221 sleeved outside the stop shaft 251, so as to form a shaft surface cooperation and improve the rotation reliability.

[0138] Specifically, the stop disc 25 further comprises an outer sleeve 222 sleeved outside the inner sleeve 221, and the second limiting part 232 is located between the inner sleeve 221 and the outer sleeve 222. In this way, the outer sleeve 222 can encapsulate the assembly surface to reduce wear.

[0139] The first limiting part 231 is connected between the inner sleeve 221 and the outer sleeve 222, which can improve the structural strength and rigidity of the rotating disc 22 and reduce the deformation probability.

[0140] Specifically, the end of the stop shaft 251 is a square shaft 2511, and the fixed disc 21 is provided with a square groove 212, and the square shaft 2511 is inserted and matched in the square groove 212. In this way, the positioning is simple and the anti-torsion ability is strong. Of course, the square shaft 2511 and the square groove 212 can also adopt other non-circular shapes as long as they are suitable.

[0141] Further, the rotating mechanism 2 further comprises a shaft sleeve 27 sleeved between the stop shaft 251 and the inner sleeve 221, thereby forming a sliding bearing pair to reduce the rotation friction.

[0142] Optionally, as shown in Figure 13 , the fixed disc 21 is provided with a shaft rotating groove 213, and one end of the shaft sleeve 27 is matched in the shaft rotating groove 213. In this way, the assembly convenience can be improved, and the shaft rotating groove 213 has a constraint on the shaft sleeve 27 to reduce friction.

[0143] Optionally, the shaft rotating groove 213 is a circular groove, which does not limit the rotation of the shaft sleeve 27.

[0144] In some specific embodiments, as shown in Figure 14 , the bottom of the square shaft 2511 is provided with a shaft fixing threaded hole 2512, and as shown in Figure 15 , the bottom of the fixed disc 21 is provided with a shaft fixing connecting hole 214, and the threaded connecting piece connects the shaft fixing threaded hole 2512 through the shaft fixing connecting hole 214. In this way, the assembly connecting position is hidden on one side of the fixed disc 21, which is convenient for protection.

[0145] Further, as shown in Figure 13As shown, the first limiting part 231 is a rib plate formed between the inner sleeve 221 and the outer sleeve 222, which can increase the connection length, improve the overall rigidity, and reduce the deformation probability of the inner sleeve 221 and the outer sleeve 222.

[0146] Further, as shown in Figure 13 The rotary disc 22 further comprises a connecting pipe 223 for connecting the jaw holder connecting member 26. Alternatively, the connecting pipe 223 is integrally formed on the outer sleeve 222.

[0147] In some embodiments, the rotary disc 22 further comprises a bottom ring 224 connected to the bottom of the outer sleeve 222 and the inner sleeve 221, which can improve the overall structural strength.

[0148] In some embodiments, the rotating mechanism 2 further comprises a power-off protection detector 241 for detecting the position of the rotary disc 22 to send a protection signal when the rotary disc 22 is away from the closed position. In this way, in use, if the C-arm 300 is rotating for shooting while the jaw holder 3 is mistakenly pushed away from the closed position, the power-off protection detector 241 can immediately send a protection signal to avoid the jaw holder 3 hitting the C-arm 300. Of course, the protection signal can make the C-arm 300 stop rotating or reset, which is not limited here.

[0149] In some embodiments, as shown in Figure 15 The fixed disc 21 is provided with a mounting hole 211, and the power-off protection detector 241 is mounted in the mounting hole 211. As shown in Figure 16 The bottom of the rotary disc 22 is provided with a detection hole 225. As shown in Figure 17 and Figure 19 As shown, the mounting hole 211 is opposite to the detection hole 225 in the closed position. After leaving the closed position, the bottom of the rotary disc 22 blocks the mounting hole 211. As shown in the open position A, since it is away from the closed position, only the detection hole 225 is exposed from above the rotary disc 22, while the mounting hole 211 and the power-off protection detector 241 are covered. In this way, the detection accuracy is high and the detection difficulty is low. Figure 18

[0150] Specifically, the bottom of the rotary disc 22 is provided with a detection hole 225, which penetrates the bottom of the rotary disc 22 along the rotary disc 22 rotation axis direction. In the closed position, the detection hole 225 is opposite to the mounting hole 211, and the power-off protection detector 241 cannot detect the signal, and the device such as oral CT is normally used. After leaving the closed position, the bottom of the rotary disc 22 blocks the mounting hole 211, and the power-off protection detector 241 detects the signal (such as the signal of metal) to start the power-off protection. Alternatively, the bottom ring 224 is provided with the detection hole 225.

[0151] ​At this time, the power-off protection detector 241 can select some low-cost sensors, such as a light sensor, etc. Of course, the present application is not limited to this, for example, the power-off protection detector 241 can select a pressure sensor, when in the closed position, the first limit part 231 presses the pressure sensor, and when leaving, the pressure changes, thereby outputting a protection signal. When the power-off protection detector 241 selects other sensors, the detection position can be adaptively adjusted.

[0152] In some embodiments, the mounting hole 211 penetrates the fixed disc 21 in the axial direction of the rotating disc 22, the power-off protection detector 241 is connected to the fixed disc 21 through the mounting seat 242, and the mounting seat 242 is located on the side of the fixed disc 21 away from the rotating disc 22. In this way, on the one hand, the power-off protection detector 241 is more stable on the fixed disc 21, and on the other hand, the installation difficulty is reduced.

[0153] Specifically, as shown in Figure 13 The mounting seat 242 includes a mounting part 2421 and a mounting part 2422, the mounting part 2421 is formed with a groove, the power-off protection detector 241 is inserted into the groove, and then the mounting part 2422 is connected to the mounting part 2421 to close the groove and fix the power-off protection detector 241. In this way, the line connection on the power-off protection detector 241 can be protected by the mounting seat 242.

[0154] The lifting and rotating device 100 of the oral CBCT device 1000 according to the embodiment of the present application comprises the lifting mechanism 1 and the rotating mechanism 2 according to the above-mentioned embodiments. The lifting mechanism 1 is the lifting mechanism 1 described in the above-mentioned embodiments, which will not be described here. The rotating mechanism 2 is the rotating mechanism 2 described in the above-mentioned embodiments, which will not be described here.

[0155] The lifting and rotating device 100 of the oral CBCT device 1000 according to the embodiment of the present application, by setting the lifting mechanism 1, reduces the shaking in the lifting process, makes the positioning accuracy of the jaw support connecting piece 26, and improves the shooting accuracy of the oral CBCT device 1000.

[0156] Specifically, the lifting mechanism 1 is vertically arranged, the middle through pipe 11 is connected to the upper end of the support 15, and the guide pipe 12 is telescopic from the upper end of the middle through pipe 11. The rotating mechanism 2 comprises a fixed disc 21, a rotating disc 22, and a jaw support connecting piece 26 connected to the rotating disc 22. The fixed disc 21 is connected to the upper end of the guide pipe 12, and the rotating disc 22 is rotationally connected to the fixed disc 21. In this way, it is convenient for the patient to fix the head when in a sitting or standing position.

[0157] The oral CBCT device 1000 according to the embodiment of the present application comprises the lifting and rotating device 100 of the oral CBCT device 1000 according to the above-mentioned embodiments.

[0158] According to the oral CBCT device 1000 of the embodiment of the present application, by setting the lifting mechanism 1, the shaking in the lifting process is reduced, the positioning accuracy of the jaw support connecting piece 26 is improved, and the shooting accuracy of the oral CBCT device 1000 is improved.

[0159] The oral CBCT device 1000 of the embodiment of the present application, other configurations such as a radiator and the like, the structure and operation thereof are known to those skilled in the art, and will not be described in detail here.

[0160] The structure and assembly and working principle of the lifting and rotating device 100 in a specific embodiment are described below with reference to the accompanying drawings.

[0161] Figure 5 The exploded view of the lifting and rotating device 100 in this embodiment is composed of a stop disc 25, a magnet (magnetic attraction part 233), a rotating disc 22, a shaft sleeve 27, a fixed disc 21, a power-off protection detector 241, a mounting seat 242, a connecting disc 121, a guide pipe 12, an end cover 14, a top screw (gap adjusting screw 133), a middle pipe 11, a sliding block 131, a support 15, a mounting bottom plate 17, a first ear seat 162, a pin shaft 164, a push rod motor 161, and a second ear seat 163. The stop disc 25, the magnet, the rotating disc 22, the shaft sleeve 27, the fixed disc 21, the power-off protection detector 241, and the mounting seat 242 constitute a rotating mechanism 2, as shown in Figure 12 and Figure 13 The rotating disc 22 is a rotating part, and the remaining parts are fixed parts. The shaft sleeve 27 is first assembled into the rotating disc 22, and the boss on both sides of the stop disc 25 constitutes a second limiting part 232, which is integrated with the magnet (see Figure 14 ), and then assembled into the shaft sleeve 27. The middle structure (such as a rib plate) of the rotating disc 22 constitutes a first limiting part 231, and the magnet is attracted to the middle structure (such as a rib plate) of the rotating disc 22 after contact, thereby constraining and fixing the rotating disc 22.

[0162] The lower end of the stop disc 25 is a square shaft 2511 matched with a square groove 212 of the fixed disc 21, and the bottom is further connected with a screw to integrate the stop disc 25 and the fixed disc 21, as shown in Figure 19 closed position, which corresponds to the B position in Figure 2 , the magnet is adsorbed on the rib plate in the middle of the rotating disc 22, as shown in Figure 18 open position, which corresponds to the A position in Figure 2When the magnet reaches the A position, the rotating disc 22 is rotated, and the magnet is separated from the rib plate. When the convex platform for fixing the magnet reaches the rib plate, it reaches the A position and cannot continue to rotate in this direction. Rotating in the opposite direction can make the magnet reach the rib plate position and be attracted to the rib plate, i.e., the B position. When in the B position, the magnet is attracted to the rib plate, and when the jaw support 3 supports the patient, the side pressure is small, so that the head fixing device can be prevented from moving away from the B position during the shooting process.

[0163] The power-off protection detector 241 is connected to the fixed disc 21 through the mounting seat 242, and the detection end penetrates the mounting hole 211 of the fixed disc 21 and is aligned with the bottom of the rotating disc 22. In the closed position, the detection end of the power-off protection detector 241 penetrates the mounting hole 211 and is aligned with the detection hole 225 in the bottom of the rotating disc 22. The detection hole 225 penetrates the bottom of the rotating disc 22 along the rotating axis direction of the rotating disc 22, and no signal is detected, and the machine operates normally. When the patient accidentally pushes the rotating disc 22, the detection hole 225 is misaligned with the mounting hole 211, and the bottom of the rotating disc 22 blocks the mounting hole 211. The power-off protection detector 241 detects the change and sends a signal, and then immediately cuts off the power supply (motor power supply), thereby playing a safety protection role. The power-off protection detector 241 sends the detected protection signal to the control module of each motor, and the control module controls the motor power supply to be turned off.

[0164] Figure 6 and Figure 7 The installation diagram of the guide part in the lifting mechanism 1 is shown. The middle through pipe 11 has rectangular holes on four sides, which are used as the expansion openings 111 for installing the sliding block 131. The small rectangular convex platform on the sliding block 131 is the expansion part 1311, which is matched with the rectangular expansion opening 111 of the middle through pipe 11.

[0165] The large rectangular block of the sliding block 131 is the guide part 1312, one side of which is attached to the inner side of the middle through pipe 11, and the gap of the attachment is adjusted by the depth of the adjusting gap screw thread hole 112 in which the jack screw is screwed into the middle through pipe 11. The deeper the jack screw is screwed into, the larger the gap is, and the closer the sliding block 131 is matched with the guide pipe 12.

[0166] After the guide part is installed, it is placed into the tubular support 15, and the four sides are fixed by screws. Then, the end cover 14 and the guide pipe 12 are assembled in sequence to form the lifting mechanism 1. The end cover 14 is used to block the side jack screw and plays an aesthetic role. After the guide pipe 12 is placed, it is attached to the four sliding blocks 131, and the tightness and guiding performance of the up-down movement of the guide pipe 12 are controlled by adjusting the jack screw. The connecting disc 121 is integrally welded with the square pipe of the guide pipe 12 and is mainly used to connect the rotating mechanism 2, such as Figure 9The push rod motor 161 is hinged to the first ear seat 162 and the second ear seat 163 through the pin shaft 164, the first ear seat 162 is connected with the fixed disc 21 of the rotating mechanism 2, the second ear seat 163 is connected with the mounting plate 17, then the mounting plate 17 is connected with the support 15. The fixed disc 21 is connected with the connecting disc 121 through the screw, so that the rotating mechanism 2 is integrated with the lifting mechanism 1, and the rotating mechanism 2 can be lifted electrically along with the guide pipe 12. The whole lifting and rotating device 100 is as shown in Figure 11 and Figure 3 as shown.

[0167] According to the above whole operation process, when the rotating mechanism 2 is in the open position, the patient is positioned and seated. The operator pushes the jaw support connector 26 to the shooting position, and because of the action of the magnet, the jaw support connector 26 is attracted and fixed, and there is no shaking, and the positioning is accurate and reliable. Then according to the position of the patient's lower jaw, the up-down distance of the lifting and rotating mechanism 2 is adjusted electrically to the specified position. After the shooting is finished, the operator pulls open the jaw support connector 26 to let the patient leave, and the whole operation process is convenient and fast. At the same time, the device is also provided with a power-off protection detector 241, which will be triggered and cut off the power supply immediately when the patient misoperates, thereby playing a safety protection role.

[0168] The lifting and rotating device 100 is simple and reliable, and when reaching the shooting position, the lifting and rotating mechanism 2 is automatically attracted and fixed under the action of the magnet, and the positioning is accurate and reliable. The magnet is in the device, and when attracted, there is no safety risk such as hand clamping. The device is also provided with a power-off protection detector 241, which will cut off the power supply immediately when the patient misoperates and pushes away the rotating mechanism 2, thereby providing protection for the safety of the patient. The lifting and rotating mechanism 2 can adjust the jaw support 3 to the appropriate position according to patients of different body types, and ensure the comfort of the patient. At the same time, by adjusting the rotation depth of the top wire, the tightness and guiding performance of the lifting guide can be adjusted. After the shooting is finished, the jaw support connector 26 only needs to be pulled open, and the pulling force can be adjusted, which is simple and convenient.

[0169] In the description of the present specification, the description referring to the terms "embodiment", "example" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are contained in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0170] While embodiments of the application have been shown and described, it is to be understood that the embodiments described are merely exemplary of the principles and application of the present application. Numerous modifications and changes can be made by those skilled in the art without departing from the spirit and scope of the application. The scope of the application is not to be limited by the embodiments shown and described, but only by the claims and their equivalents.

Claims

1. A lifting mechanism for an oral CBCT device, characterized in that, include: A central tube, wherein the tube wall is provided with a telescopic opening and an adjusting threaded hole; A guide tube, which is movably fitted outside or inside the central tube along its length; A gap adjustment assembly includes a slider and an adjusting threaded component. The slider includes a telescopic part and a guide part connected together. The guide part is located between the central tube and the guide tube. The guide part contacts and engages with the wall of the guide tube to guide the guide tube to move relative to the guide part along the tube length direction. The telescopic part is telescopically engaged within the telescopic opening to support the guide part. The adjusting threaded component is threaded into the adjusting threaded hole and abuts against the guide part to adjust the tightness between the guide part and the guide tube after rotation. Support member, which is connected to the central tube; The central tube and the guide tube are polygonal tubes with the same shape, and the tube walls between adjacent side edges of the polygonal tubes are ridge walls; each polygonal tube has at least three ridge walls; The gap adjustment assembly includes multiple sliders, and at least one slider is connected to each of the ribs of the central tube, with the gap adjustment thread fitting on at least one slider. The guide portion is a flat plate, and multiple adjusting threaded parts are provided on the slider connected to the adjusting threaded hole. The multiple adjusting threaded parts are arranged at intervals around the telescopic portion.

2. The lifting mechanism of the dental CBCT device according to claim 1, characterized in that, The central tube and the guide tube are square tubes, and each has four ribs; the sliders on only two adjacent ribs are connected to the adjusting threaded parts.

3. The lifting mechanism of the dental CBCT device according to claim 1, characterized in that, The guide part is a square plate, the telescopic part is a square block smaller than the guide part, the telescopic opening is a corresponding square opening, and the slider connected to the adjusting threaded hole has four adjusting threaded parts, which are set at the four corners of the guide part.

4. The lifting mechanism of the dental CBCT device according to claim 1, characterized in that, The support component is a support tube, which is sleeved outside the central tube or disposed inside the central tube, and the central tube is fixedly connected to the support tube.

5. The lifting mechanism of the dental CBCT device according to claim 4, characterized in that, The surface of the central tube facing the support tube includes: The contact mating surface is in surface contact with the wall of the support tube, and the contact mating surface is an annular surface. The spacer surface is connected to the contact mating surface and is spaced apart from the wall of the support tube. The telescopic opening is located on the contact mating surface and the spacer surface.

6. The lifting mechanism of the dental CBCT device according to claim 4, characterized in that, When the support tube is sleeved outside the central tube, the support tube has tool clearance holes on its wall corresponding to at least a portion of the adjustment threaded holes.

7. The lifting mechanism of the dental CBCT device according to claim 6, characterized in that, Also includes: An end cap, detachably connected to the top of the support tube and disposed around the guide tube, the end cap covering at least a portion of the tool clearance hole.

8. The lifting mechanism of the dental CBCT device according to claim 4, characterized in that, Also includes: A telescopic drive assembly is disposed inside the support tube or the guide tube. One end of the telescopic drive assembly is provided with a rotatable first lug to connect one of the guide tube and the support tube, and the other end of the telescopic drive assembly is provided with a rotatable second lug to connect the other of the guide tube and the support tube.

9. The lifting mechanism of the dental CBCT device according to claim 8, characterized in that, The telescopic drive assembly includes a push rod motor, the body of which is connected to the second lug via a pin, and the motor shaft of which is connected to the first lug via a pin.

10. A lifting and rotating device for an oral CBCT device, characterized in that, include: According to any one of claims 1-9, the lifting mechanism of the dental CBCT device is arranged vertically, the central tube is connected to the upper end of the support member, and the guide tube is retractable from the upper end of the central tube; A rotating mechanism, comprising a fixed disk, a turntable, and a jaw support connector connected to the turntable, wherein the fixed disk is connected to the upper end of the guide tube, and the turntable is rotatably connected to the fixed disk.

11. The lifting and rotating device of the dental CBCT equipment according to claim 10, characterized in that, The rotating mechanism includes an angle limiting component, which comprises: A first limiting part, wherein there is at least one first limiting part, and the first limiting part is connected to one of the fixed disk and the turntable; The second limiting part is connected to the fixed plate and the other of the turntable, and two second limiting parts are provided for each first limiting part; The turntable has a closed position and an open position. In the closed position, the first limiting part abuts against one of the two corresponding second limiting parts, and in the open position, the first limiting part abuts against the other of the two corresponding second limiting parts.

12. The lifting and rotating device of the dental CBCT equipment according to claim 11, characterized in that, The first limiting part is fixed relative to the turntable, and the second limiting part is fixed relative to the fixed plate; One of the first limiting part and the second limiting part is provided with a magnetic part, and in the closed position, the magnetic part attracts the other of the first limiting part and the second limiting part.

13. The lifting and rotating device of the dental CBCT equipment according to any one of claims 11-12, characterized in that, The rotating mechanism further includes: a stop plate connected above the fixed plate, a turntable sandwiched between the stop plate and the fixed plate, a first limiting part connected to the bottom of the stop plate, and a second limiting part disposed on the turntable.

14. The lifting and rotating device of the dental CBCT equipment according to claim 13, characterized in that, The bottom of the stop plate is provided with a stop shaft, and the bottom of the stop shaft is connected to the fixed plate; The turntable includes an inner sleeve and an outer sleeve, the inner sleeve being fitted over the outside of the stop shaft, the outer sleeve being fitted over the outside of the inner sleeve, and the first limiting part being connected between the inner sleeve and the outer sleeve; The second limiting part is located between the inner sleeve and the outer sleeve.

15. The lifting and rotating device of the dental CBCT equipment according to claim 11, characterized in that, Also includes: A power failure protection detector is installed on the fixed disk. The power failure protection detector is used to detect the position of the turntable and to issue a protection signal when the turntable leaves the closed position.

16. The lifting and rotating device of the dental CBCT equipment according to claim 15, characterized in that, The fixed plate is provided with mounting holes, the bottom of the turntable is provided with detection holes, and the power failure protection detector is installed in the mounting holes; When in the closed position, the mounting hole is opposite to the detection hole. After leaving the closed position, the bottom of the turntable blocks the mounting hole.

17. A dental CBCT device, characterized in that, include: The lifting and rotating device for an oral CBCT device according to any one of claims 10-16.

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