CN116407146A

CN116407146A - Lifting mechanism, lifting rotating device and oral cavity CBCT equipment with lifting rotating device

Info

Publication number: CN116407146A
Application number: CN202111639624.4A
Authority: CN
Inventors: 刘俊; 徐明峰
Original assignee: Hefei Meyer Optoelectronic Technology Inc
Current assignee: Hefei Meyer Optoelectronic Technology Inc
Priority date: 2021-12-29
Filing date: 2021-12-29
Publication date: 2023-07-11

Abstract

The invention discloses a lifting mechanism, a lifting rotating device and oral cavity CBCT equipment with the same. The lifting mechanism comprises: the pipe wall of the middle through pipe is provided with a telescopic opening and a gap adjusting threaded hole; the guide pipe is movably sleeved outside or inside the middle through pipe along the length direction of the guide pipe; the gap adjusting assembly comprises a sliding block and a gap adjusting threaded piece, the sliding block comprises a telescopic part and a guide part, the telescopic part and the guide part are connected, the guide part is positioned between the middle through pipe and the guide pipe, the guide part is in contact fit with the pipe wall of the guide pipe to guide the guide pipe to move along the length direction of the guide pipe relative to the guide part, the telescopic part is telescopically fit in the telescopic opening to support the guide part, the gap adjusting threaded piece is in threaded fit with the gap adjusting threaded hole, and the gap adjusting threaded piece is propped against the guide part to adjust the tightness degree between the guide part and the guide pipe after rotation; and a support. The lifting mechanism can reduce shaking in the lifting process and improve positioning accuracy.

Description

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

Technical Field

The invention belongs to the field of medical instruments, and particularly relates to a lifting mechanism, a lifting rotating device and oral cavity CBCT equipment with the lifting mechanism.

Background

In the related art, the principle of the oral cavity CBCT device (such as an oral cavity cone beam projection computer recombination tomography device) is that an X-ray generator makes a ring DR around an projection body with a lower radiation amount, and then acquires a 3-dimensional image after computer reconstruction by gathering data acquired after a plurality of digital projections around the projection body. CBCT devices are widely used for the diagnosis of various hard tissue diseases of the oral, dental, maxillofacial surfaces. Because of the CBCT imaging principle, the patient's skull needs to be positioned accurately and remain in a fixed position during the imaging process.

At present, the skull supporting and positioning device of the CBCT equipment in the related art has the following problems: the guide clearance is big in the vertical lift in-process, rocks obviously, and the location is inaccurate, influences shooting accuracy.

Disclosure of Invention

The present invention aims to solve at least one of the technical problems existing in the prior art. Therefore, the invention provides a lifting mechanism of oral cavity CBCT equipment, which is used for adjusting the guide clearance and reducing shaking so as to be beneficial to improving the positioning accuracy.

The invention also aims to provide a lifting rotating device with the lifting mechanism and oral cavity CBCT equipment.

According to an embodiment of the invention, the lifting mechanism of the oral cavity CBCT device comprises: the pipe wall of the middle through pipe is provided with a telescopic opening and a gap adjusting threaded hole; the guide pipe is movably sleeved outside the middle through pipe or inside the middle through pipe along the length direction of the guide pipe; the gap adjusting assembly comprises a sliding block and a gap adjusting screw piece, the sliding block comprises a telescopic part and a guide part which are connected, the guide part is positioned between the middle through pipe and the guide pipe, the guide part is in contact fit with the pipe wall of the guide pipe so as to guide the guide pipe to move along the pipe length direction relative to the guide part, the telescopic part is telescopically fit in the telescopic opening so as to support the guide part, the gap adjusting screw piece is in screw fit with the gap adjusting screw hole, and the gap adjusting screw piece is propped against the guide part so as to adjust the tightness degree between the guide part and the guide pipe after rotation; the support piece is connected to the middle through pipe.

According to the lifting mechanism of the oral cavity CBCT equipment, the middle through pipe is matched with the guide pipe through the guide part of the sliding block, and the guide pipe is guided to slide along the length direction of the pipe. The gap adjusting screw thread piece is arranged for adjusting the distance between the guide part and the middle through pipe, the tightness degree between the guide part and the guide pipe is adjustable by rotating the gap adjusting screw thread piece, the gap between the guide part and the guide pipe can be adjusted to be larger during assembly or storage, the load of the gap adjusting screw thread piece is reduced, the gap between the guide part and the guide pipe is adjusted to be smaller or even free of the gap during use, and the guide pipe does not shake during sliding along the guide part. And when the gap adjusting screw piece rotates to adjust the gap, the sliding block moves in the telescopic opening of the middle through pipe through the telescopic part, so that the overall reliability and stability are ensured. When the lifting mechanism is used, shaking in the lifting process can be reduced, the positioning accuracy in long-term use can be maintained, and the shooting accuracy of the oral cavity CBCT equipment is improved.

In some embodiments, the middle tube and the guide tube are polygonal tubes with consistent shapes, and the tube wall between adjacent side edges of the polygonal tubes is an edge wall; the number of the edge walls of each polygonal pipe is at least three; the gap adjusting assembly comprises a plurality of sliding blocks, each edge wall of the middle through pipe is connected with at least one sliding block, and at least one sliding block is matched with the gap adjusting threaded piece.

In some embodiments, the middle tube and the guide tube are square tubes, and each has four of the prismatic walls; only two adjacent sliding blocks on the edge walls are connected with the gap adjusting screw.

In some embodiments, the guiding portion is a flat plate, and the plurality of gap adjusting screw members are arranged on the sliding block connected with the gap adjusting screw holes and are arranged around the telescopic portion at intervals.

In some embodiments, the guiding portion is a square flat plate, the telescopic portion is a square block with a size smaller than that of the guiding portion, the telescopic opening is a corresponding square opening, four gap adjusting screw pieces are arranged on the sliding block connected with the gap adjusting screw holes and correspond to four corners of the guiding portion.

In some embodiments, the support member is a support tube, the support tube is sleeved outside or inside the middle through tube, and the middle through tube is fixedly connected with the support tube.

In some embodiments, the surface of the middle tube facing the support tube comprises: the contact matching surface is in surface contact matching with the pipe wall of the supporting pipe, and is an annular surface; the spacing surface is connected with the contact matching surface and is arranged at intervals with the pipe wall of the supporting pipe; the expansion opening is positioned on the contact matching surface and the spacing surface.

In some embodiments, when the support pipe is sleeved outside the middle through pipe, a tool avoiding hole corresponding to at least part of the clearance adjusting threaded hole is formed in the pipe wall of the support pipe.

In some embodiments, the lifting mechanism further comprises: and the end cover is detachably connected to the top of the supporting tube and surrounds the guide tube, and covers at least part of the tool avoidance holes.

In some embodiments, the lifting mechanism further comprises: the telescopic driving assembly is arranged in the supporting tube or the guiding tube, one end of the telescopic driving assembly is provided with a rotatable first ear seat so as to be connected with one of the guiding tube and the supporting tube, and the other end of the telescopic driving assembly is provided with a rotatable second ear seat so as to be connected with the other one of the guiding tube and the supporting tube.

In some embodiments, the telescopic driving assembly comprises a push rod motor, a body of the push rod motor is connected with the second ear seat through a pin shaft, and a motor shaft of the push rod motor is connected with the first ear seat through a pin shaft.

According to an embodiment of the invention, a lifting and rotating device of oral cavity CBCT equipment comprises: according to the lifting mechanism of the oral cavity CBCT equipment, which is provided by the embodiment, the lifting mechanism is vertically arranged, the middle through pipe is connected to the upper end of the supporting piece, and the guide pipe is telescopic from the upper end of the middle through pipe; the rotating mechanism comprises a fixed disc, a rotary disc and a jaw support connecting piece connected with the rotary disc, wherein the fixed disc is connected with the upper end of the guide tube, and the rotary disc is rotationally connected with the fixed disc.

According to the lifting rotating device of the oral cavity CBCT equipment, provided by the embodiment of the invention, the shaking in the lifting process is reduced by arranging the lifting mechanism, so that the positioning accuracy of the jaw support connecting piece is improved, and the shooting accuracy of the oral cavity CBCT equipment is improved.

In some embodiments, the rotation mechanism includes an angle limiting assembly comprising: the first limiting part is at least one and is connected with one of the fixed disc and the rotary disc; the second limiting parts are connected with the other one of the fixed disc and the rotary disc, and two second limiting parts are arranged corresponding to each first limiting part; the rotary table is provided with a closing position and an opening position, wherein the first limiting part is abutted against one of the two corresponding second limiting parts in the closing position, and the first limiting part is abutted against the other of the two corresponding second limiting parts in the opening position.

In some embodiments, the first limit portion is fixed relative to the turntable, and the second limit portion is fixed relative to the fixed disk; 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.

In some embodiments, the rotation mechanism further comprises: the stop disc is connected to the upper portion of the fixed disc, the rotary 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 rotary disc.

In some embodiments, a stop shaft is arranged at the bottom of the stop disc, and the bottom of the stop shaft is connected with the fixed disc; the turntable comprises: the inner sleeve is sleeved outside the stop shaft, the outer sleeve is sleeved outside the inner sleeve, and the first limiting part is connected between the inner sleeve and the outer sleeve; the second limiting part is positioned between the inner sleeve and the outer sleeve.

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

In some embodiments, the fixed disk is provided with a mounting hole, the bottom of the rotary disk is provided with a detection hole, and the power-off protection detector is mounted in the mounting hole; when the rotary table is in the closed position, the mounting hole is opposite to the detection hole, and after the rotary table leaves the closed position, the bottom of the rotary table shields the mounting hole.

An oral CBCT apparatus according to an embodiment of the present invention includes: the lifting and rotating device of the oral cavity CBCT equipment according to the embodiment.

According to the oral cavity CBCT equipment provided by the embodiment of the invention, by arranging the lifting mechanism, the shaking in the lifting process is reduced, the positioning accuracy of the jaw support connecting piece is improved, and the shooting accuracy of the oral cavity CBCT equipment is improved.

Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.

Drawings

The foregoing and/or additional aspects and advantages of the invention will become apparent and may be better understood from the following description of embodiments taken in conjunction with the accompanying drawings in which:

FIG. 1 is a schematic view of an oral cavity CBCT apparatus according to an embodiment of the present invention, when a lifting and rotating device is in a closed position;

FIG. 2 is a graph showing a comparison of changes in the oral CBCT apparatus according to the present invention when the lifting and rotating device is in the open position and the closed position (the two lifting and rotating devices are respectively the lifting and rotating devices in the two positions);

FIG. 3 is a graph showing a comparison of changes in the lifting and rotating device from an open position to a closed position according to an embodiment of the present invention;

FIG. 4 is a schematic view of a lifting and rotating device according to an embodiment of the present invention;

FIG. 5 is an exploded view of the lifting and rotating device according to the embodiment of the present invention;

FIG. 6 is a schematic view of a portion of the components of a lift mechanism according to an embodiment of the present invention;

FIG. 7 is an exploded view of the portion shown in FIG. 6;

FIG. 8 is a block diagram of yet another portion of the components of the lift mechanism of an embodiment of the present invention;

FIG. 9 is an exploded view of the portion shown in FIG. 8;

FIG. 10 is an exploded view of a lift mechanism according to an embodiment of the present invention;

FIG. 11 is an assembly effect diagram of the lift mechanism shown in FIG. 10;

FIG. 12 is a schematic view of a rotary mechanism according to an embodiment of the present invention;

FIG. 13 is an exploded view of a rotary mechanism according to an embodiment of the present invention;

FIG. 14 is a schematic view of a stopper disc according to an embodiment of the present invention;

FIG. 15 is a schematic diagram of a fixed disk and a power-off protection detector according to an embodiment of the present invention;

FIG. 16 is a schematic illustration of a turntable according to an embodiment of the present invention;

FIG. 17 is a schematic view of a turntable, sleeve, and stationary disk installation in accordance with an embodiment of the present invention;

FIG. 18 is an internal schematic view of a rotary mechanism in an open position according to an embodiment of the present invention;

fig. 19 is an internal schematic view of a rotary mechanism in a closed position according to an embodiment of the present invention.

Reference numerals:

oral cavity CBCT equipment 1000,

A lifting and rotating device 100,

A lifting mechanism 1,

A middle through pipe 11, a telescopic opening 111, a gap adjusting threaded hole 112, a middle through hole 113, a contact matching surface 114, a spacing surface 115, a middle through hole 116,

Guide tube 12, connecting disc 121, conduit connecting hole 122,

Gap adjusting unit 13, slider 131, expansion and contraction portion 1311, guide portion 1312, gap adjusting screw 133,

End cap 14, end cap hole 141, top ring plate 142, outer ring plate 144,

Support 15, tool relief hole 151, support one hole 152,

Telescoping drive assembly 16, push rod motor 161, first ear mount 162, second ear mount 163, pin 164,

A mounting base plate 17,

A rotary mechanism 2,

A fixed disk 21, a mounting plate 211, a square groove 212, a shaft rotating groove 213, a shaft fixing connecting hole 214, a fixing first hole 215, a fixing second hole 216,

Turntable 22, inner sleeve 221, outer sleeve 222, adapter 223, bottom ring 224, detection hole 225,

An angle limiting component 23, a first limiting part 231, a second limiting part 232, a magnetic attraction part 233,

A power-off protection detector 241, a mounting base 242, a mounting first portion 2421, a mounting second portion 2422,

Stop disk 25, stop shaft 251, square shaft 2511, shaft-fixing threaded hole 2512,

Jaw support connector 26,

A sleeve 27,

Jaw rest 3,

A seat 200, a U-shaped arm 300.

Detailed Description

Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the invention.

In the description of the present invention, it should be understood that the terms "center," "length," "width," "thickness," "upper," "lower," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counter-clockwise," "axial," "radial," "circumferential," and the like indicate an orientation or positional relationship based on that shown in the drawings, merely for convenience of description and to simplify the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the invention. Furthermore, features defining "first", "second" may include one or more such features, either explicitly or implicitly. In the description of the present invention, unless otherwise indicated, the meaning of "a plurality" is two or more.

In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.

An oral CBCT apparatus 1000 according to an embodiment of the present invention is described below with reference to the accompanying drawings.

In some practical examples, as shown in fig. 1 and 2, the oral CBCT apparatus 1000 includes a seat 200, and a C-arm 300 is provided above the seat 200, and the C-arm 300 can be rotated to photograph the human skull. The structure and principle of the C-arm 300 for capturing images are known in the art, and will not be described herein. Of course, this application does not exclude the fact that the oral CBCT apparatus 1000 does not include the seat 200, and the patient is kept in a standing posture during the examination.

The oral CBCT apparatus 1000 is used for image photographing of the oral cavity and the jaw face, and thus the jaw support 3 is required to position the skull so that the image component can be accurately photographed.

In the solution of the present application, the means for supporting the jaw rest 3 are lifting and rotating means 100. As shown in fig. 2, the lifting and rotating device 100 has a switchable open position and a closed position. In the open position, the lifting and rotating device 100 drives the jaw rest 3 to avoid the front side of the seat 200, so that a patient can sit in the seat 200 conveniently. In the closed position, the lifting and rotating device 100 drives the jaw rest 3 to rotate to the front side of the seat 200 so as to support the skull of the patient. For ease of understanding, the components are shown in an open position at a and a partially closed position at B.

As shown in fig. 3, the lifting and rotating device 100 includes a lifting mechanism 1 and a rotating mechanism 2, the rotating mechanism 2 is connected to the lifting mechanism 1, and the jaw rest 3 is mounted on the rotating mechanism 2. The height of the jaw support 3 can be adjusted during lifting of the lifting mechanism 1, so that the height of the jaw support 3 can adapt to the requirements of different heights of patients. The rotating mechanism 2 can drive the jaw support 3 to rotate, so that the jaw support 3 can be switched at different positions.

The elevating mechanism 1 of the oral CBCT apparatus 1000 according to the embodiment of the present invention, as shown in fig. 4 and 5, includes: the device comprises a middle through pipe 11, a guide pipe 12, a supporting piece 15 and a gap adjusting assembly 13, wherein the supporting piece 15 is connected to the middle through pipe 11, and the supporting piece 15 is a supporting foundation of the lifting mechanism 1.

In the present embodiment, as shown in fig. 5, the guide tube 12 is movably located in the middle tube 11 along the length direction of the tube, that is, the middle tube 11 is sleeved outside the guide tube 12. Alternatively, the guide tube 12 is movably sleeved outside the middle tube 11 in the tube length direction.

As shown in fig. 6 and 7, the gap adjusting assembly 13 includes a slider 131 and a gap adjusting screw 133, the slider 131 includes a telescopic portion 1311 and a guide portion 1312 connected, the guide portion 1312 is located between the middle tube 11 and the guide tube 12, and the guide portion 1312 is in contact fit with the tube wall of the guide tube 12 to guide the guide tube 12 to move in the tube length direction.

The pipe wall of the middle through pipe 11 is provided with a telescopic opening 111 and a gap adjusting threaded hole 112. Telescoping portion 1311 is telescopically engaged within telescoping port 111 to support guide portion 1312, clearance adjustment screw 133 is threadedly engaged with clearance adjustment threaded bore 112, and clearance adjustment screw 133 bears against guide portion 1312. After the gap adjusting screw 133 is rotated, the tightness between the guide portion 1312 and the guide pipe 12 is adjusted. When the clearance adjustment screw 133 rotates in one direction, the clearance adjustment guide 1312 is loosened from the guide pipe 12; the clearance adjustment screw 133 adjusts the clearance between the guide portion 1312 and the guide pipe 12 when rotated in the other direction. Since the telescopic portion 1311 and the guide portion 1312 on the slider 131 are connected, the slider 131 is always engaged with the telescopic opening 111 of the middle tube 11 through the telescopic portion 1311 when the clearance adjusting screw member 133 is rotated and adjusted, so that the telescopic direction of the slider 131 is guided and restricted.

Here, the extension directions of the expansion port 111 and the clearance adjustment screw hole 112 may be parallel, for example, perpendicular to the longitudinal direction of the guide tube 12. The extending direction of the telescopic hole 111 and the clearance adjusting threaded hole 112 may also form a certain included angle, for example, the axis of the telescopic hole 111 is offset upward by 3 degrees relative to the horizontal plane, and the axis of the clearance adjusting threaded hole 112 is offset downward by 3 degrees relative to the horizontal plane, so that the scheme of the application can be realized.

According to the elevating mechanism 1 of the oral cavity CBCT apparatus 1000 of the embodiment of the invention, the middle through pipe 11 is matched with the guide pipe 12 through the guide part 1312 of the sliding block 131, and the guide pipe 12 is guided to slide along the length direction of the pipe. Wherein the tightness between the guide portion 1312 and the guide tube 12 is adjustable by rotating the clearance adjusting screw 133 by providing the clearance adjusting screw 133 for adjusting the distance between the guide portion 1312 and the middle tube 11. In this way, the gap between the guide portion 1312 and the guide tube 12 can be adjusted to be larger during assembly or storage, so that the assembly is convenient, and the load of the gap adjusting screw 133 is reduced. When in use, the gap between the guide part 1312 and the guide pipe 12 is adjusted to be smaller or even free of gaps, so that the shaking of the guide pipe 12 when in expansion and contraction is reduced.

And when the gap adjusting screw member 133 rotates for gap adjustment, the sliding block 131 moves in the telescopic opening 111 of the middle through pipe 11 through the telescopic part 1311, so that the overall reliability and stability are ensured. When the lifting mechanism 1 is used, shaking in the lifting process can be reduced, positioning accuracy in long-term use can be maintained, and shooting accuracy of the oral cavity CBCT equipment 1000 is improved.

In some embodiments, as shown in fig. 6 and 7, the middle tube 11 and the guide tube 12 are polygonal tubes with uniform shapes, and the tube walls between adjacent side edges of the polygonal tubes are edge walls. The number of the edge walls of each polygonal pipe is at least three, for example, the middle through pipe 11 and the guide pipe 12 are triangular pipes, and the middle through pipe 11 and the guide pipe 12 are respectively provided with three edge walls; or the middle through pipe 11 and the guide pipe 12 are square pipes, and the middle through pipe 11 and the guide pipe 12 are respectively provided with four prismatic walls; or the middle through pipe 11 and the guide pipe 12 are all five-sided pipes, the middle through pipe 11 and the guide pipe 12 are respectively provided with five prismatic walls, and the like.

The gap adjusting assembly 13 includes a plurality of sliding blocks 131, at least one sliding block 131 is connected to each edge wall of the middle through pipe 11, and a gap adjusting screw member 133 is matched with at least one sliding block 131.

The middle through pipe 11 and the guide pipe 12 are respectively formed into polygonal pipes, and the respective prismatic walls are respectively matched with the sliding blocks 131, so that the guide pipe 12 can be guided along the circumferential multi-angle positions. And the middle through pipe 11 and the guide pipe 12 respectively form polygonal pipes, so that the angle measurement and the processing are convenient. Thereby, the guiding accuracy can be improved.

In some embodiments, as shown in fig. 6 and 7, the middle tube 11 and the guide tube 12 are square tubes, each have four side walls, and only two adjacent side walls have the sliding blocks 131 connected with the gap adjusting screw member 133. Taking the orientation shown in fig. 6 as an example, among the four side walls, the slider 131 provided on the front side wall and the right side wall has a clearance adjusting screw 133 for adjusting the clearance. And the left side edge wall and the rear side edge wall are provided with the sliding blocks 131, and the gap adjusting screw members 133 are not used for adjusting the gap. By the arrangement, the guide tube 12 can be adjusted in two horizontal directions, two sliding blocks 131 in the same direction are not required to be adjusted, and adjustment difficulty is reduced.

Of course, the solution of the present application may be subject to further design changes. For example, in some embodiments, the middle tube 11 and the guide tube 12 are square tubes, and the slider 131 on only one edge wall is connected with the clearance adjusting screw 133. For another example, when the number of the ribs of the middle tube 11 and the guide tube 12 is changed, the slider 131 to which the gap adjusting screw 133 is connected may be selected.

In some embodiments, at least two clearance adjustment screws 133 are attached to the slider 131. Alternatively, at least two gap adjusting screws 133 are arranged in a horizontal direction, so that the angle of the guide tube 12 with respect to the horizontal plane can be adjusted by the gap adjusting screws 133. Alternatively, at least two gap adjusting screws 133 are arranged in a vertical direction, so that the angle of the guide tube 12 with respect to the longitudinal surface can be adjusted by the gap adjusting screws 133.

In some embodiments, as shown in fig. 6 and 7, the guide portion 1312 is a flat plate, and the guide portion 1312 has a larger contact area with the guide tube 12, so that the stability of the telescopic movement of the guide tube 12 can be improved. The plurality of gap adjusting screw members 133 are provided on the slider 131 connected with the gap adjusting screw holes 112, and the plurality of gap adjusting screw members 133 are arranged around the telescopic portion 1311 at intervals, so that the adjusting effect on the guide tube 12 is more remarkable.

In some embodiments, as shown in fig. 6 and 7, the guide portion 1312 is a square flat plate, the telescopic portion 1311 is a square block with a size smaller than that of the guide portion 1312, and the telescopic opening 111 is a corresponding square opening, so that the processing difficulty is reduced, and the parallelism between the surfaces and the perpendicularity between the surfaces are facilitated.

The slider 131 connected with the clearance adjusting screw hole 112 is provided with four clearance adjusting screws 133 corresponding to four corners of the guide portion 1312.

It will be appreciated that the shape of the guide 1312 may also vary and the portion of the guide tube 12 with which it is assembled may vary adaptively. Depending on the shape of the guide portion 1312, the guide portion 1312 and the guide tube 12 may be in surface contact, or line contact between the guide portion 1312 and the guide tube 12 may be used, which is not limited.

In some embodiments, the support member 15 is a support tube, and the support tube is sleeved outside the middle through tube 11 or is arranged inside the middle through tube 11, and the middle through tube 11 is fixedly connected with the support tube.

When the support 15 is a tube body, the positions among the middle through tube 11, the guide tube 12 and the support tube can be changed and combined to form various designs. In order to adapt to the above changes, the equivalent structures on the three tubes can be adapted. The guide tube 12 and the support 15 are interchangeable in relation to the installation of the middle tube 11, e.g. the guide tube 12 is an outer tube and the support 15 is an inner tube.

For example, when the support pipe is sleeved outside the middle tube 11 and the middle tube 11 is sleeved outside the guide pipe 12, the clearance adjusting screw 133 is mounted on the middle tube 11. At this time, as shown in fig. 6 and 5, the head of the clearance adjusting screw 133 is directed outwards, and the wall of the support pipe is provided with a tool avoiding hole 151 corresponding to at least part of the clearance adjusting screw hole 112. Thus, the clearance adjusting screw 133 corresponding to the tool escape hole 151 can be rotated from the tool for supporting the pipe, and the tightness of the guide pipe 12 can be adjusted. In some embodiments, when the support tube is sleeved outside the middle through tube 11 and the middle through tube 11 is sleeved outside the guide tube 12, the upper end of the support tube is lower than the clearance adjusting screw member 133, so that the tool avoiding hole 151 can be omitted.

For another example, the guide tube 12 is sleeved outside the middle through tube 11, and in order to enable the guide tube 12 to be adjusted at any position in the telescopic process, an avoidance groove (not shown) corresponding to at least part of the gap adjusting threaded holes 112 can be formed on the guide tube 12.

In some embodiments, as shown in fig. 7, the clearance screw 133 is a cylindrical jackscrew. In some solutions, when the guide tube 12 is sleeved outside the middle through tube 11, the tail part of the gap adjusting screw member 133 is provided with an external thread to connect with the gap adjusting screw hole 112, and the head part of the gap adjusting screw member 133 is provided with a notch, so that if a tool can be inserted into the notch, a circular plate can be arranged on the peripheral wall of the gap adjusting screw member 133, and the circular plate is propped against the guide portion 1312. When the guide portion 1312 is unscrewed outward, the guide portion 1312 is pressed outward against the inner wall of the guide tube 12.

In some embodiments, as shown in fig. 6 and 5, the support tube facing surface of the middle tube 11 comprises: the contact matching surface 114 and the spacing surface 115, the contact matching surface 114 is in surface contact matching with the pipe wall of the supporting pipe, and the contact matching surface 114 is an annular surface. The spacing surface 115 is connected to the contact mating surface 114, and the spacing surface 115 is spaced apart from the wall of the support tube. The telescoping ports 111 are located on the contact mating face 114 and the spacer face 115.

By the arrangement of the contact mating surface 114 and the spacing surface 115, it is possible to ensure that the mating area of the slider 131 and the guide tube 12 is sufficiently large, while reducing the area of relatively high-precision processing of the mating surface of the middle tube 11 and the support 15, thereby reducing the cost to some extent and increasing the reliability of the design.

The contact mating surface 114 is an annular surface, which can fully limit the centering tube 11 in a direction perpendicular to the length of the tube. The arrangement of the contact mating surface 114 and the spacing surface 115 may be flexibly arranged, for example, the spacing surface 115 may be one section, and the spacing surface 115 may be two sections.

The contact mating surface 114 is provided to limit the separation or rocking of the middle tube 11 from the support tube in a direction perpendicular to the mating surface. In addition, the middle through pipe 11 and the guide pipe 12 are supported by the clearance adjusting screw member 133, and at least displacement of the middle through pipe 11 and the support pipe in the sliding direction of the guide pipe 12 is limited.

In the above embodiment, as shown in fig. 7, alternatively, both the guide tube 12 and the supporting member 15 may be formed by processing existing tubular profiles, where the contact mating surface 114 is an outer side surface of the middle tube 11, and an inner side surface of the supporting member 15 has a corresponding contact surface, so that the processing precision is relatively high. The spacing surface 115 is integrally contracted inwards relative to the contact mating surface 114, does not participate in the mating of the surfaces, and has relatively low machining precision requirements.

Specifically, the middle tube 11 and the supporting member 15 need to be fixedly connected. The middle through pipe 11 is provided with a middle through hole 113, the supporting piece 15 is provided with a supporting hole 152, and the two holes are opposite and can be connected through a fastener such as a screw.

In some embodiments, as shown in fig. 5 and 8, the lifting mechanism 1 further includes: an end cap 14, the end cap 14 being removably attached to the top of the support tube and disposed around the guide tube 12, the end cap 14 covering at least a portion of the tool relief hole 151. This can improve the aesthetic appearance of the lifting mechanism 1. In addition, the gap adjusting screw member 133 is not easy to fall out due to shielding of the end cover 14.

In particular, the end cap 14 may be connected to a support tube or a middle tube 11. For example, as shown in fig. 9, the end cover 14 is provided with an end cover first hole 141, and the top of the middle through pipe 11 is provided with a middle through second hole 116, which are opposite to each other, and can be connected by a fastener such as a screw. The through-hole 116 may be provided as a threaded hole at this time.

Further, the end cap 14 includes a top ring plate 142 and an outer ring plate 144, the top ring plate 142 being positioned on top of the middle tube 11 and the support tube, the outer ring plate 144 being connected to the outer edge of the top ring plate 142 and then covering the top gap adjusting screw 133. The shape of the end cover 14 is matched with the shape of the middle through pipe 11 and the supporting pipe.

In some embodiments, as shown in fig. 9, the end of the guide tube 12 is provided with a connection disc 121, and the guide tube 12 is provided with a connection disc 121 for connecting the rotation mechanism 2.

Alternatively, in the above embodiment, the slider 131 is made of plastic material, and the guide tube 12 is made of metal material, so that friction can be reduced, service life can be prolonged, and use effect can be improved.

In some embodiments, the lifting mechanism 1 further comprises: the telescopic driving assembly 16, the telescopic driving assembly 16 is arranged in the supporting tube or the guiding tube 12, one end of the telescopic driving assembly 16 is provided with a rotatable first ear seat 162, the other end of the telescopic driving assembly 16 is provided with a rotatable second ear seat 163, one of the first ear seat 162 and the second ear seat 163 is connected with the guiding tube 12, and the other is connected with the supporting tube.

In some embodiments, as shown in fig. 10 and 11, the telescoping drive assembly 16 is disposed within a support tube, with one end of the telescoping drive assembly 16 having a first rotatable ear mount 162 for attachment to the guide tube 12 and the other end of the telescoping drive assembly 16 having a second rotatable ear mount 163 for attachment to the support tube. When the telescopic driving assembly 16 is telescopic, the first ear seat 162 and the second ear seat 163 which are rotatable are utilized for self-adaptive adjustment, so that the clamping phenomenon is avoided, and the assembly difficulty is reduced.

Specifically, the telescopic driving assembly 16 includes a push rod motor 161, the body of the push rod motor 161 is connected to a second ear seat 163 through a pin shaft 164, and the motor shaft of the push rod motor 161 is connected to a first ear seat 162 through a pin shaft 164. The push rod motor 161 is arranged, so that the lifting mechanism 1 adopts an electric lifting mode, the operation is convenient and quick, and the lifting amplitude adjustment precision is high.

Further, as shown in fig. 11, the elevating mechanism 1 further includes a mounting base plate 17 attached to the bottom of the support pipe, and the second ear mount 163 is fixed to the mounting base plate 17 by screws or the like.

The rotating mechanism 2 according to the embodiment of the present invention, as shown in fig. 12 and 13, includes a fixed disk 21 and a turntable 22, the turntable 22 being used to connect a jaw rest connector 26, and the jaw rest 3 being mountable on the jaw rest connector 26. When the jaw support link 26 is manually pushed or electrically driven to rotate, the dial 22 rotates relative to the fixed dial 21, switching the dial 22 between the open and closed positions. The turntable 22 is supported by the fixed disk 21, and can improve rotational stability.

Specifically, the fixed disk 21 is connected to the guide tube 12, so that the guide tube 12 can drive the rotation mechanism 2 to lift when it stretches out and draws back relative to the middle tube 11.

Further, the telescopic drive assembly 16 is attached to the fixed disk 21, thereby reducing the difficulty of installation with the guide tube 12.

As in the embodiment shown in fig. 15, the bottom of the fixing plate 21 is provided with a fixing first hole 215 and a fixing second hole 216, the fixing first hole 215 can be fixedly connected with the first ear seat 162 through a fastener such as a screw, and the fixing second hole 216 can be fixedly connected with the conduit connecting hole 122 on the connecting disc 121 on the top of the guide tube 12 through a fastener such as a screw. The fixing hole 215 and the fixing hole 216 may be threaded holes, and may be fixed from the bottom.

In some embodiments, as shown in fig. 13 and 14, the rotation mechanism 2 further includes: a stopper disk 25, the stopper disk 25 is attached to the fixed disk 21, and the turntable 22 is sandwiched between the stopper disk 25 and the fixed disk 21. It can be said that the turntable 22 is also rotatably connected to the stop disk 25. The turntable 22 is clamped between the stop disc 25 and the fixed disc 21, so that the turntable 22 can be restrained from two ends of the turntable 22, the rotation stability of the turntable 22 is improved, and the shaking of the turntable 22 during rotation is reduced. And the device is convenient to assemble, the matching position can be encapsulated, and the possibility that impurities enter the matching surface is reduced.

In some embodiments, the rotation mechanism 2 further comprises: angle limiting assembly 23, angle limiting assembly 23 includes: a first limit portion 231 and a second limit portion 232.

The first limit part 231 is at least one, and the first limit part 231 is connected with one of the stop disc 25 and the turntable 22, and the second limit part 232 is connected with the other of the stop disc 25 and the turntable 22. Two second limiting portions 232 are provided corresponding to each first limiting portion 231. The turntable 22 has a closed position in which the first limit portion 231 abuts against one of the corresponding two second limit portions 232, and an open position in which the first limit portion 231 abuts against the other of the corresponding two second limit portions 232.

Taking the first limiting portion 231 as an example, two second limiting portions 232 are used at this time, and a center angle between the two second limiting portions 232 and the axis of the turntable 22 is substantially consistent with the rotation amplitude of the turntable 22.

In some embodiments, the number of the first limiting parts 231 is two or more, and the second limiting parts 232 can be flexibly arranged. Although the first limit portion 231 may be one, when the first limit portion 231 is two or more, the restriction of the turntable 22 in the open position and the closed position may be increased, improving the reliability.

Here, two second limiting portions 232 are corresponding to each first limiting portion 231. The different first limiting portions 231 may not share the second limiting portion 232, but may share the second limiting portion 232. For example, when the first limit parts 231 are two, the second limit parts 232 may be three. When the different first limiting portions 231 share the second limiting portions 232, the number of the second limiting portions 232 can be saved.

When there are at least two first limit parts 231, they may be distributed in the radial direction of the turntable 22 or may be distributed in the circumferential direction of the turntable 22, which is not limited herein.

In some embodiments, as shown in fig. 16, the first limiting portions 231 are two and are distributed symmetrically with respect to the center of the rotation axis of the turntable 22, as shown in fig. 14, the second limiting portions 232 are two and are distributed symmetrically with respect to the center of the rotation axis of the turntable 22, as shown in fig. 18 and 19, and the two first limiting portions 231 and the two second limiting portions 232 are alternately distributed along the circumferential direction. Such that the two first limiting parts 231 share the two second limiting parts 232, wherein one first limiting part 231 is limited between one sides of the two second limiting parts 232, and the other first limiting part 231 is limited between the other sides of the two second limiting parts 232. This ensures the reliability of the parking of the turntable 22 in the open and closed positions and maximizes the use of the full angular space of the turntable 22.

In some embodiments, at least one of the first limit portion 231 and the second limit portion 232 is provided with a magnetic attraction portion 233, and in the closed position, the magnetic attraction portion 233 keeps the first limit portion 231 and the second limit portion 232 attracted.

Here, the magnetic attraction portion 233 may be provided only on the first limit portion 231, or the magnetic attraction portion 233 may be provided only on the second limit portion 232, or the magnetic attraction portion 233 may be provided on both the first limit portion 231 and the second limit portion 232.

According to the rotating mechanism 2 of the oral cavity CBCT device 1000 in the embodiment of the present invention, the rotating disc 22 can stop when rotating to the open position or the closed position by the mutual limitation of the first limiting part 231 and the second limiting part 232, so as to avoid the accidental injury of the user caused by the components connected with the rotating disc 22. In particular, the magnetic attraction parts 233 are arranged, so that the turntable 22 can be kept at the closed position when rotating to the closed position, the turntable 22 is accurately positioned at the closed position, and the turntable is not easy to shake when being at the closed position, thereby improving the shooting accuracy of the oral cavity CBCT equipment 1000. And because the turntable 22 is restrained by the magnetic attraction force when the turntable 22 is in the closed position, if a user mistakenly pushes the turntable 22 to cause the turntable 22 to rotate, the user can feel the change of the magnetic attraction force when mistakenly pushing, so that the function of reminding the user can be achieved.

Here, the structure of the magnetic attraction portion 233 is not limited, and the magnetic attraction portion 233 may be a separate member and fixed to the first and

second stopper portions

231 and 232. In some embodiments, the magnetic attraction portion 233 and the first limiting portion 231 are integrally formed, for example, a magnet is used as the first limiting portion 231. Or the magnetic attraction portion 233 and the second limiting portion 232 are integrated, for example, a magnet is used as the second limiting portion 232.

Specifically, the magnetic attraction portion 233 may be fixed to the surfaces of the first and second limiting

portions

231 and 232, or may be embedded therein, which is not limited herein. The magnetic attraction portion 233 may be a magnet, a magnetic powder, an electromagnet, or the like.

In some embodiments, the first stop 231 is fixed relative to the turntable 22, i.e., the first stop 231 rotates with the turntable 22. The second limiting portion 232 is fixed relative to the stop disc 25, and the second limiting portion 232 may be fixedly connected to the stop disc 25 or the fixed disc 21.

As shown in fig. 19, the two second limiting portions 232 are provided with magnetic attraction portions 233 on the same side in the circumferential direction, and the two magnetic attraction portions 233 respectively abut against the two first limiting portions 231 in the closed position. The arrangement is such that the maximum suction force can be achieved between the first limit part 231 and the second limit part 232 when in the closed position, and the rotating mechanism 2 is most stable when in the closed position.

In the open position, as shown in fig. 18, the attraction force between the magnetic attraction portion 233 and the first limit portion 231 is reduced due to the interval between the second limit portions 232, so that the closing operation is facilitated.

Specifically, the first limiting portion 231 is connected to the bottom of the stopper plate 25, and the second limiting portion 232 is provided on the turntable 22, so that assembly can be facilitated.

Further, the attraction force may be adjusted by the number of the magnetic attraction portions 233 (e.g., magnets) and the contact surface size, and a plurality of the magnetic attraction portions 233 may be arranged in the circumferential direction and/or the radial direction of the turntable 22.

In some embodiments, the stop disc 25 is provided with a stop shaft 251, the end of the stop shaft 251 being connected to the fixed disc 21, the turntable 22 comprising: the inner sleeve 221 is sleeved outside the stop shaft 251, so that shaft surface matching can be formed, and the rotation reliability is improved.

Specifically, the stopper disk 25 further includes: the outer sleeve 222, the inner sleeve 221 is sleeved outside the stop shaft 251, the outer sleeve 222 is sleeved outside the inner sleeve 221, and the second limiting part 232 is positioned between the inner sleeve 221 and the outer sleeve 222. The jacket 222 thus encapsulates the mounting surface to reduce wear.

The first limiting portion 231 is connected between the inner sleeve 221 and the outer sleeve 222, so that structural strength and rigidity of the turntable 22 can be improved, and deformation probability can be reduced.

Specifically, the end of the stop shaft 251 is a square shaft 2511, and the fixed disk 21 is provided with a square groove 212, and the square shaft 2511 is inserted into the square groove 212. Therefore, the positioning is simple, and the torsion resistance is strong. Of course, the square shaft 2511 and the square groove 212 may take other non-circular shapes as long as they are adapted.

Further, the rotation mechanism 2 further includes a sleeve 27 interposed between the stopper shaft 251 and the inner sleeve 221, thereby constituting a slide bearing pair, thereby reducing the rotational friction force.

Alternatively, as shown in fig. 13, a pivoting groove 213 is provided on the fixed disk 21, and one end of the boss 27 is fitted in the pivoting groove 213. This improves the ease of assembly and the pivot slot 213 restrains the sleeve 27 to reduce friction.

Alternatively, the shaft rotation groove 213 is a circular groove, and does not restrict rotation of the shaft sleeve 27.

In some embodiments, as shown in fig. 14, a shaft fixing threaded hole 2512 is formed at the bottom of the square shaft 2511, and as shown in fig. 15, a shaft fixing connecting hole 214 is formed at the bottom of the fixing plate 21, and a threaded connector is connected to the shaft fixing threaded hole 2512 through the shaft fixing connecting hole 214. Thus, the assembly connection position is hidden at one side of the fixed disc 21, and the protection is convenient.

Further, as shown in fig. 13, the first limiting portion 231 is a rib formed between the inner sleeve 221 and the outer sleeve 222, which can increase the connection length, increase the overall rigidity, and reduce the deformation probability of the inner sleeve 221 and the outer sleeve 222.

Further, as shown in fig. 13, the rotary table 22 further includes a nipple 223 for connecting to the jaw support connector 26. Optionally, a nipple 223 is integrally formed on the outer sleeve 222.

In some embodiments, the turntable 22 further includes a bottom ring 224, where the bottom ring 224 is attached to the bottom of the outer sleeve 222 and the inner sleeve 221, which may increase the overall structural strength.

In some embodiments, the rotation mechanism 2 further comprises: the power-off protection detector 241 is configured to detect a position of the dial 22 to emit a protection signal when the dial 22 is moved away from the closed position. Thus, in use, if the C-arm 300 is rotating to shoot, and the jaw rest 3 is being misplaced from the closed position, the power-off protection detector 241 may immediately signal protection to prevent the jaw rest 3 from striking the C-arm 300. Of course, the protection signal may stop the rotation of the C-arm 300, or may reset the C-arm 300, which is not limited herein.

In some embodiments, as shown in fig. 15, a mounting hole 211 is provided on the stationary plate 21, and a power-off protection detector 241 is mounted in the mounting hole 211. As shown in fig. 16, the bottom of the turntable 22 is provided with a detection hole 225. As shown in fig. 17 and 19, the mounting hole 211 is opposite the detection hole 225 in the closed position. After leaving the closed position, the bottom of the turntable 22 shields the mounting hole 211, and in the open position shown in a, as shown in fig. 18, only the detection hole 225 is exposed from above the turntable 22 due to the leaving of the closed position, and the mounting hole 211 and the power-off protection detector 241 are covered. Thus, the detection precision is high and the detection difficulty is low.

Specifically, the bottom of the turntable 22 is provided with a detection hole 225, and the detection hole 225 penetrates the bottom of the turntable 22 along the rotation axis direction of the turntable 22. In the closed position, the detection aperture 225 is opposite the mounting aperture 211 and no signal is detected by the power-off protection detector 241 and the device such as oral CT is in normal use. The bottom of the dial 22 shields the mounting hole 211 after leaving the closed position and the power-off protection detector 241 detects a signal (e.g., a signal that detects metal) to initiate power-off protection. Optionally, a detection hole 225 is provided on the bottom ring 224.

At this time, the power-off protection detector 241 may select some lower cost sensors, such as selecting a light sensor, etc. Of course, the present application is not limited thereto, and for example, the power-off protection detector 241 may select a pressure sensor, and the first stopper 231 presses the pressure sensor when in the closed position, and the pressure changes when away, thereby outputting a protection signal. The detection position may be adaptively adjusted when the power-off protection detector 241 selects other sensors.

In some embodiments, mounting holes 211 extend through stationary platen 21 in the axial direction of turntable 22, and power-off protection detector 241 is coupled to stationary platen 21 by a mount 242, with mount 242 being located on a side of stationary platen 21 that is remote from turntable 22. This makes the power-off protection detector 241 more stable on the stationary plate 21 on the one hand and reduces the difficulty of installation.

Specifically, as shown in fig. 13, the mounting base 242 includes a mounting first portion 2421 and a mounting second portion 2422, the mounting first portion 2421 has a groove formed thereon, the power-off protection detector 241 is inserted into the groove, and then the mounting second portion 2422 is connected to the mounting first portion 2421 to close the groove, thereby fixing the power-off protection detector 241. Thus, the line connection on the power-off protection detector 241 can be protected by the mount 242.

The elevating and rotating apparatus 100 of the oral CBCT device 1000 according to an embodiment of the present invention includes: the lifting mechanism 1 and the rotating mechanism 2 according to the above-described embodiments. The lifting mechanism 1 is the lifting mechanism 1 described in the above embodiment, and will not be described here. The rotation mechanism 2 is the rotation mechanism 2 described in the above embodiment, and will not be described here.

According to the lifting and rotating device 100 of the oral cavity CBCT equipment 1000 provided by the embodiment of the invention, by arranging 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 cavity CBCT equipment 1000 is improved.

Specifically, the lifting mechanism 1 is vertically arranged, the middle through pipe 11 is connected to the upper end of the supporting member 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 with the rotating disc 22, wherein the fixed disc 21 is connected to the upper end of the guide tube 12, and the rotating disc 22 is rotatably connected to the fixed disc 21. Thus, the patient can conveniently fix the skull in sitting or standing posture.

An oral CBCT apparatus 1000 according to an embodiment of the present invention includes: the elevating and rotating apparatus 100 of the oral CBCT device 1000 according to the above-described embodiment.

According to the oral cavity CBCT equipment 1000 provided by the embodiment of the invention, by arranging 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 cavity CBCT equipment 1000 is improved.

The structure and operation of the oral CBCT apparatus 1000 according to the embodiment of the present invention, other structures thereof, such as a radiator, etc., are known to those skilled in the art, and will not be described in detail herein.

The structure and assembly and operation of the lifting and rotating device 100 according to one embodiment will be described with reference to the accompanying drawings.

Fig. 5 is an exploded view of the lifting and rotating device 100 according to this embodiment, which is composed of a stopper plate 25, a magnet (magnetic attraction portion 233), a turntable 22, a sleeve 27, a fixed plate 21, a power-off protection detector 241, a mount 242, a connecting plate 121, a guide tube 12, an end cap 14, a jackscrew (clearance adjusting screw 133), a middle tube 11, a slider 131, a support 15, a mounting base 17, a first ear mount 162, a pin 164, a push rod motor 161, and a second ear mount 163, respectively. The stopper disk 25, the magnet, the turntable 22, the boss 27, the fixed disk 21, the power-off protection detector 241, and the mount 242 constitute the rotation mechanism 2, as shown in fig. 12 and 13. The turntable 22 is a rotating part, the other parts are fixed parts, the shaft sleeve 27 is firstly arranged in the turntable 22, the bosses on two sides of the stop disc 25 form a second limiting part 232, the second limiting part and the magnet are fixedly combined into a whole (see fig. 14), and the second limiting part and the magnet are then arranged in the shaft sleeve 27. The middle structure (such as rib plate) of the turntable 22 forms a first limit part 231, and the magnet is attracted and restrained and fixed with the turntable 22 after contacting with the middle structure (such as rib plate) of the turntable 22.

The lower end of the stop disc 25 is provided with a square shaft 2511 which is matched with the square groove 212 of the fixed disc 21, and the bottom is connected with the fixed disc 21 by a screw so as to fasten the stop disc 25 and the fixed disc 21 into a whole. In the closed position of fig. 19, corresponding to position B of fig. 2, the magnet is attracted to the rib in the middle of the turntable 22. As shown in the open position in fig. 18, i.e., corresponding to the position a in fig. 2, the rotary dial 22 is rotated to separate the magnet from the rib, and when the boss for fixing the magnet abuts against the rib, the position a is reached, the rotation cannot be continued in this direction, and the reverse rotation can cause the magnet to reach the position of the rib to be attracted to the rib, i.e., the position B. In the B position, since the magnet is attracted to the rib plate, when the jaw brace 3 supports the patient, the pressure applied from the side is small, and therefore, the head fixing device can be prevented from being separated from the B position during photographing.

The power-off protection detector 241 is connected to the fixed disk 21 through the mounting seat 242, and the detection end passes through the mounting hole 211 of the fixed disk 21 and is aligned with the bottom of the turntable 22. In the closed position, the detection end of the power-off protection detector 241 is aligned with the detection hole 225 at the bottom of the turntable 22 through the mounting hole 211, the detection hole 225 penetrates through the bottom of the turntable 22 along the rotation axis direction of the turntable 22, no signal is detected, and the machine operates normally. When the patient carelessly pushes the rotary table 22, the positions of the detection holes 225 and the mounting holes 211 are staggered, the bottom of the rotary table 22 shields the mounting holes 211, the power-off protection detector 241 can detect the change and send out a signal, and then the power supply (motor power supply) is cut off by the stand horse, so that the safety protection function is realized. The power-off protection detector 241 transmits the detected protection signal to the control module of each motor, and the control module controls the power of the motor to be turned off.

Fig. 6 and 7 are installation views of the guide portion in the elevating mechanism 1. Rectangular holes are formed in four sides of the middle through pipe 11 and used as telescopic holes 111 for installing the sliding blocks 131, and small rectangular bosses on the sliding blocks 131 are telescopic parts 1311 and are just matched with the rectangular telescopic holes 111 of the middle through pipe 11.

The large rectangular block of the sliding block 131 is a guiding part 1312, one surface of the guiding part 1312 is attached to the inner side of the middle through pipe 11, and the attached gap is adjusted by screwing the jackscrew into the depth of the gap adjusting threaded hole 112 of the middle through pipe 11. The deeper the jackscrew is screwed in, the greater the clearance is for its trailing end to bear against the guide 1312 and the tighter the engagement of the slider 131 with the guide tube 12.

After the guide part is installed, the guide part is placed into a tubular supporting piece 15, four sides of the guide part are connected and fixed through screws, and then the end cover 14 and the guide pipe 12 are assembled in sequence, so that the lifting mechanism 1 is formed. The end cover 14 is used for shielding side jackscrews, plays an attractive role, is attached to the four-side sliding blocks 131 after the guide tube 12 is placed in the guide tube, and controls the up-and-down lifting tightness and the guiding performance of the guide tube 12 by adjusting the jackscrews. The connection disc 121 is welded integrally with the square tube of the guide tube 12, and is mainly used for connecting the rotating mechanism 2, as shown in fig. 9. The upper and lower ends of the push rod motor 161 are hinged with a first ear seat 162 and a second ear seat 163 through a pin shaft 164, the first ear seat 162 is connected with a fixed disk 21 of the rotating mechanism 2, the second ear seat 163 is connected with the mounting base plate 17, and then the mounting base plate 17 is connected with the supporting member 15. The fixing plate 21 is connected with the connecting plate 121 through screws, so that the rotating mechanism 2 and the lifting mechanism 1 are fixedly combined into a whole, the rotating mechanism 2 can be electrically lifted along with the guide pipe 12, and the whole lifting and rotating device 100 is shown in fig. 11 and 3.

To integrate the whole operation, the patient is seated in the open position of the rotating mechanism 2. The operator pushes the jaw support connecting piece 26 to the shooting position, and the jaw support connecting piece 26 can be attracted and fixed under the action of the magnet, so that the jaw support connecting piece is free from shaking and accurate and reliable in positioning. Then, the up-down distance of the elevating rotation mechanism 2 is adjusted electrically to a specified position according to the mandibular position of the patient. After shooting is finished, the operator pulls the jaw support connecting piece 26 away again, so that the patient leaves, and the whole operation process is convenient and quick. Meanwhile, a power-off protection detector 241 is also arranged in the device, and when a patient operates by mistake, the power supply is immediately triggered and cut off, so that the safety protection function is realized.

The lifting and rotating device 100 is simple and reliable, and when the lifting and rotating mechanism 2 reaches the shooting position, the lifting and rotating mechanism can be automatically attracted and fixed under the action of the magnet, and the positioning is accurate and reliable. The magnet is arranged in the device, so that safety risks such as clamping hands and the like can be avoided during suction. The power-off protection detector 241 is also arranged in the device, and when a patient misoperates to push the rotating mechanism 2 open, the power supply can be immediately cut off, so that the safety of the patient is ensured. The lifting and rotating mechanism 2 can adjust the jaw support 3 to a proper position according to patients with different sizes, so that the comfort of the patients is ensured. Meanwhile, the tightness degree and the guiding performance of lifting guiding can be adjusted by adjusting the screwing depth of the jackscrew. After shooting is finished, the jaw support connecting piece 26 is pulled open, and the pulling force is adjustable, so that the method is simple and convenient.

In the description herein, reference to the term "embodiment," "example," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: many changes, modifications, substitutions and variations may be made to the embodiments without departing from the spirit and principles of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A lifting mechanism of an oral CBCT apparatus, comprising:

the pipe wall of the middle through pipe is provided with a telescopic opening and a gap adjusting threaded hole;

the guide pipe is movably sleeved outside the middle through pipe or inside the middle through pipe along the length direction of the guide pipe;

the gap adjusting assembly comprises a sliding block and a gap adjusting screw piece, the sliding block comprises a telescopic part and a guide part which are connected, the guide part is positioned between the middle through pipe and the guide pipe, the guide part is in contact fit with the pipe wall of the guide pipe so as to guide the guide pipe to move along the pipe length direction relative to the guide part, the telescopic part is telescopically fit in the telescopic opening so as to support the guide part, the gap adjusting screw piece is in screw fit with the gap adjusting screw hole, and the gap adjusting screw piece is propped against the guide part so as to adjust the tightness degree between the guide part and the guide pipe after rotation;

The support piece is connected to the middle through pipe.

2. The elevating mechanism of an oral CBCT apparatus according to claim 1, wherein,

the middle through pipe and the guide pipe are polygonal pipes with consistent shapes, and the pipe wall between adjacent side edges of the polygonal pipes is an edge wall; the number of the edge walls of each polygonal pipe is at least three;

the gap adjusting assembly comprises a plurality of sliding blocks, each edge wall of the middle through pipe is connected with at least one sliding block, and at least one sliding block is matched with the gap adjusting threaded piece.

3. The elevating mechanism of an oral CBCT apparatus according to claim 2, wherein,

the middle through pipe and the guide pipe are square pipes and are provided with four prismatic walls; only two adjacent sliding blocks on the edge walls are connected with the gap adjusting screw.

4. The lifting mechanism of an oral CBCT apparatus according to claim 1, wherein the guide portion is a flat plate, and the plurality of gap adjusting screw members are arranged on the slider connected with the gap adjusting screw hole at intervals around the telescopic portion.

5. The elevating system of an oral CBCT apparatus according to claim 4, wherein the guide part is a square plate, the telescopic part is a square block with a size smaller than that of the guide part, the telescopic opening is a corresponding square opening, four gap adjusting screw members are arranged on the sliding block connected with the gap adjusting screw holes, and four corners of the guide part are correspondingly arranged.

6. The lifting mechanism of an oral CBCT apparatus according to claim 1, wherein the support member is a support tube, the support tube is sleeved outside or inside the middle tube, and the middle tube is fixedly connected with the support tube.

7. The elevating mechanism of an oral CBCT apparatus according to claim 6, wherein a surface of the middle tube facing the support tube comprises:

the contact matching surface is in surface contact matching with the pipe wall of the supporting pipe, and is an annular surface;

the spacing surface is connected with the contact matching surface and is arranged at intervals with the pipe wall of the supporting pipe;

the expansion opening is positioned on the contact matching surface and the spacing surface.

8. The elevating system of oral CBCT apparatus according to claim 6, wherein when the support tube is sleeved outside the middle tube, a tool avoiding hole is provided on a wall of the support tube, which corresponds to at least a part of the clearance adjusting screw hole.

9. The elevating mechanism of an oral CBCT apparatus according to claim 8, further comprising: and the end cover is detachably connected to the top of the supporting tube and surrounds the guide tube, and covers at least part of the tool avoidance holes.

10. The elevating mechanism of an oral CBCT apparatus according to claim 6, further comprising: the telescopic driving assembly is arranged in the supporting tube or the guiding tube, one end of the telescopic driving assembly is provided with a rotatable first ear seat so as to be connected with one of the guiding tube and the supporting tube, and the other end of the telescopic driving assembly is provided with a rotatable second ear seat so as to be connected with the other one of the guiding tube and the supporting tube.

11. The elevating system of an oral CBCT apparatus according to claim 10, wherein the telescopic driving assembly comprises a push rod motor, a body of the push rod motor is connected to the second ear seat through a pin shaft, and a motor shaft of the push rod motor is connected to the first ear seat through a pin shaft.

12. A lifting and rotating device of an oral CBCT apparatus, comprising:

the elevating mechanism of the oral CBCT apparatus according to any one of claims 1 to 11, the elevating mechanism being vertically arranged, the middle tube being connected to an upper end of the support, the guide tube being retractable from an upper end of the middle tube;

the rotating mechanism comprises a fixed disc, a rotary disc and a jaw support connecting piece connected with the rotary disc, wherein the fixed disc is connected with the upper end of the guide tube, and the rotary disc is rotationally connected with the fixed disc.

13. The elevating and rotating assembly for an oral CBCT apparatus according to claim 12, wherein the rotating mechanism comprises an angle limiting assembly, comprising:

the first limiting part is at least one and is connected with one of the fixed disc and the rotary disc;

the second limiting parts are connected with the other one of the fixed disc and the rotary disc, and two second limiting parts are arranged corresponding to each first limiting part;

the rotary table is provided with a closing position and an opening position, wherein the first limiting part is abutted against one of the two corresponding second limiting parts in the closing position, and the first limiting part is abutted against the other of the two corresponding second limiting parts in the opening position.

14. The lifting and rotating device of the oral CBCT apparatus according to claim 13, wherein the first limiting portion is fixed with respect to the turntable, and the second limiting portion is fixed with respect to the fixed disk;

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.

15. The elevating rotation means of an oral CBCT apparatus according to any one of claims 13 to 14, wherein the rotation mechanism further comprises: the stop disc is connected to the upper portion of the fixed disc, the rotary 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 rotary disc.

16. The lifting and rotating device of the oral CBCT apparatus according to claim 15, wherein a stopping shaft is provided at a bottom of the stopping plate, and the bottom of the stopping shaft is connected to the fixed plate;

the turntable comprises: the inner sleeve is sleeved outside the stop shaft, the outer sleeve is sleeved outside the inner sleeve, and the first limiting part is connected between the inner sleeve and the outer sleeve;

the second limiting part is positioned between the inner sleeve and the outer sleeve.

17. The elevating rotation apparatus of an oral CBCT apparatus of claim 13, further comprising:

the power-off protection detector is arranged on the fixed disc and is used for detecting the position of the rotary disc so as to send out a protection signal when the rotary disc leaves the closed position.

18. The lifting and rotating device of the oral CBCT apparatus according to claim 17, wherein a mounting hole is formed on the fixed disc, a detection hole is formed at the bottom of the turntable, and the power-off protection detector is mounted in the mounting hole;

when the rotary table is in the closed position, the mounting hole is opposite to the detection hole, and after the rotary table leaves the closed position, the bottom of the rotary table shields the mounting hole.

19. An oral CBCT apparatus, comprising: a lifting and rotating device of an oral CBCT apparatus according to any one of claims 12 to 18.