CN217471964U - Rotary mechanism and oral CBCT (cone beam computed tomography) equipment with same - Google Patents

Abstract

The utility model discloses a rotary mechanism and have its oral cavity CBCT equipment. The rotating mechanism includes: fixing the disc; a stopper disk; the rotary disc is rotatably connected with the stop disc; spacing subassembly of angle includes: the first limiting part and the second limiting part. The turntable is provided with a closed position and an open position, the first limiting part abuts against one of the two corresponding second limiting parts in the closed position, and the first limiting part abuts against the other one of the two corresponding second limiting parts in the open position. The magnetic attraction part is arranged on at least one of the first limiting part and the second limiting part, and the first limiting part and the second limiting part are kept to attract each other in the closed position. The rotating mechanism enables the rotating disc to be stably stopped when rotating to the opening position or the closing position.

Description

Rotary mechanism and oral CBCT (cone beam computed tomography) equipment with same

Technical Field

The utility model belongs to the field of medical equipment, especially, relate to a rotary mechanism and have its oral cavity CBCT equipment.

Background

In the related art, the oral CBCT apparatus (e.g., oral cone beam projection computerized reconstruction tomography apparatus) is based on the principle that an X-ray generator makes an annular DR around a projection object with a relatively low dose of radiation, and then data obtained in an intersection after multiple digital projections around the projection object are reconstructed by a computer to obtain a 3-dimensional image. The CBCT equipment is widely applied to diagnosis of various hard tissue diseases of oral, dental and maxillofacial surfaces. Due to the CBCT imaging principle, the skull of the patient needs to be accurately positioned and kept in a fixed position during the imaging process.

At present, the skull supporting and positioning device of the CBCT device in the related art has the following problems: the rotating device is not restrained, the safety risk is high, and if the patient pushes the head support positioning device carelessly, the head support positioning device is likely to collide with the rotating U-shaped arm, so that great potential safety hazards are caused.

SUMMERY OF THE UTILITY MODEL

The utility model discloses aim at solving one of the technical problem that exists among the prior art at least. Therefore, the utility model provides a rotary mechanism of oral cavity CBCT equipment to reduce the potential safety hazard.

The utility model discloses still aim at providing an oral cavity CBCT equipment that has above-mentioned rotary mechanism.

According to the utility model discloses rotary mechanism of oral cavity CBCT equipment, include: fixing the disc; the stop disc is connected with the fixed disc; a turntable rotatably connected with the stopper disc; spacing subassembly of angle includes: the first limiting part is at least one, and is connected with one of the stop disc and the rotary disc; the second limiting parts are connected with the other one of the stop disc and the rotary disc, and two second limiting parts are arranged corresponding to each first limiting part; the turntable is provided with a closed position and an open position, the first limiting part abuts against one of the two corresponding second limiting parts in the closed position, and the first limiting part abuts against the other one of the two corresponding second limiting parts in the open position; and at least one of the first limiting part and the second limiting part is provided with a magnetic part, and the first limiting part and the second limiting part are kept attracted in the closed position.

According to the utility model discloses rotary mechanism of oral cavity CBCT equipment, through the mutual spacing of first spacing portion and the spacing portion of second, make the carousel can be at the locking when rotating to open position or closed position, avoid the carousel even part accidental injury user. Especially, the arrangement of the magnetic suction part enables the rotary table to be kept at the closed position when the rotary table rotates to the closed position, so that the rotary table is accurately positioned at the closed position and is not easy to shake when the rotary table is positioned at the closed position, and the shooting accuracy of the oral CBCT equipment is improved. And because the carousel receives magnetic attraction to retrain when the closed position, if the user pushes away the carousel by mistake and leads to the carousel to rotate, the user can experience the magnetic attraction and change when the mistake is pushed away, consequently can play the effect of reminding the user.

In some embodiments, the first limiting portions are two and are distributed symmetrically with respect to the rotation axis center of the turntable, the second limiting portions are two and are distributed symmetrically with respect to the rotation axis center of the turntable, and the two first limiting portions and the two second limiting portions are alternately distributed along the circumferential direction.

In some embodiments, the first position-limiting portion is fixed relative to the turntable, and the second position-limiting portion is fixed relative to the stop disk;

the two second limiting parts are arranged on the same side in the circumferential direction and are magnetically attracted, and the two magnetic attraction parts are respectively attached to the two first limiting parts in the closed position.

In some embodiments, the rotary mechanism further comprises: a power-off protection detector for detecting a position of the turntable to issue a protection signal when the turntable leaves the closed position.

In some embodiments, the power-off protection detector and the second limit portion are both fixed relative to the stopper disc, and the power-off protection detector is disposed adjacent to one of the second limit portions.

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 rotary table covers the mounting hole after the rotary table leaves the closed position.

In some embodiments, the mounting hole penetrates through the fixed disk in the axial direction of the rotary disk, and the power-off protection detector is connected to the fixed disk through a mounting seat located on a side of the fixed disk far away from the rotary disk.

In some embodiments, the stopping disk is provided with a stopping shaft, an end of the stopping shaft is connected with the fixing disk, and the rotating disk includes: 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 fixed disc is provided with a rotation groove, the rotation mechanism further comprises a shaft sleeve sleeved between the stop shaft and the inner sleeve, and one end of the shaft sleeve is fitted in the rotation groove.

In some embodiments, the end part of the stop shaft is a square shaft, and a shaft fixing threaded hole is formed in the bottom of the square shaft;

the fixed disk is provided with a square groove matched with the square shaft, the bottom of the fixed disk is provided with a shaft fixing connecting hole, and the threaded connecting piece is connected with the shaft fixing threaded hole through the shaft fixing connecting hole.

According to the utility model discloses oral cavity CBCT equipment, include: according to the rotating mechanism of the oral CBCT device, the turntable is connected with the jaw support connecting piece.

According to the utility model discloses oral cavity CBCT equipment through setting up above-mentioned rotary mechanism, is difficult for rocking when making the jaw hold in the palm the connecting piece and be in closed position to the accuracy is shot to oral cavity CBCT equipment has been 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 above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

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

fig. 2 is a graph showing a comparison of the variation of the CBCT apparatus in the present invention when the lifting/lowering/rotating device is at the open position and the closed position (in the figure, the two lifting/rotating devices are at the two positions, respectively);

fig. 3 is a diagram illustrating a change of the lifting and rotating device from the open position to the closed position according to an embodiment of the present invention;

fig. 4 is a schematic view of a lifting and rotating device in 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 part of the components of the lifting mechanism according to the embodiment of the present invention;

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

fig. 8 is a structural view of another part of the lifting mechanism according to the 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 assembled effect view of the lifting mechanism shown in FIG. 10;

figure 12 is a schematic view of a rotary mechanism of an embodiment of the present invention;

figure 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 disk of an embodiment of the present invention;

fig. 15 is a schematic view of the stationary platen and the power-off protection detector according to an embodiment of the present invention;

fig. 16 is a schematic view of a turntable according to an embodiment of the present invention;

fig. 17 is a schematic view of the installation of the turntable, the shaft sleeve and the fixing disc of the embodiment of the present invention;

figure 18 is an internal schematic view of a rotary mechanism of an embodiment of the present invention in an open position;

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:

an oral CBCT device 1000,

A lifting and rotating device 100,

A lifting mechanism 1,

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

A guide tube 12, a connecting disc 121, a guide tube connecting hole 122,

The clearance adjusting component 13, the slide block 131, the telescopic part 1311, the guide part 1312, the clearance adjusting screw 133,

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

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

A telescopic driving component 16, a push rod motor 161, a first ear seat 162, a second ear seat 163, a pin 164,

A mounting bottom plate 17,

A rotating mechanism 2,

A fixed disc 21, a mounting hole 211, a square groove 212, a shaft rotating groove 213, a shaft fixing connection hole 214, a fixing one hole 215, a fixing two holes 216,

Rotary table 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 part 233,

A power-off protection detector 241, a mounting seat 242, a first mounting part 2421, a second mounting part 2422,

A stop disk 25, a stop shaft 251, a square shaft 2511, a shaft fastening threaded hole 2512,

A jaw support connecting piece 26,

A shaft sleeve 27,

A jaw support 3,

A seat 200, a C-arm 300.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.

In the description of the present invention, it is to 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 orientations or positional relationships based on those shown in the drawings, and are merely for convenience of description and to simplify 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 should not be construed as limiting the invention. Furthermore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected" and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled 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 embodiments, as shown in fig. 1 and 2, the oral CBCT apparatus 1000 includes a chair 200, a C-arm 300 is disposed above the chair 200, and the C-arm 300 can be rotated to photograph the skull of a human. Here, the structure and principle of the C-arm 300 for capturing images are prior art and will not be described herein. Of course, in the present application, it is not excluded that the oral CBCT apparatus 1000 is not provided with the chair 200, and the patient maintains a standing posture during the examination.

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

In the solution of the present application, the means for supporting the jaw support 3 is an elevating and rotating means 100. As shown in fig. 2, the elevation rotation apparatus 100 has switchable open and closed positions. When the chair is in the open position, the lifting and rotating device 100 drives the jaw support 3 to avoid the front side of the chair 200, so that the patient can conveniently sit in the chair 200. When the chair is in the closed position, the lifting and rotating device 100 drives the jaw support 3 to rotate to the front side of the chair 200 so as to support the skull of the patient. For ease of understanding, the parts are shown in the open position at a and in the 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 support 3 is mounted on the rotating mechanism 2. The height of the jaw support 3 can be adjusted when the lifting mechanism 1 is lifted, so that the height of the jaw support 3 can meet 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.

According to the utility model discloses oral cavity CBCT apparatus 1000's elevating system 1, as shown in fig. 4 and 5, include: the middle through pipe 11, the guide pipe 12, the supporting piece 15 and the gap adjusting component 13, the supporting piece 15 is connected to the middle through pipe 11, and the supporting piece 15 is the supporting base of the lifting mechanism 1.

In the present embodiment, as shown in fig. 5, the guide tube 12 is movably located in the middle through tube 11 along the length direction of the tube, i.e. the middle through tube 11 is sleeved outside the guide tube 12. Or the guide tube 12 can be movably sleeved outside the middle through tube 11 along the tube length direction.

As shown in fig. 6 and 7, the gap adjustment assembly 13 includes a sliding block 131 and a gap adjustment screw 133, the sliding block 131 includes a telescopic portion 1311 and a guide portion 1312, the guide portion 1312 is located between the middle through pipe 11 and the guide pipe 12, and the guide portion 1312 is in contact fit with the pipe wall of the guide pipe 12 to guide the guide pipe 12 to move along the pipe length direction.

The pipe wall of the middle through pipe 11 is provided with a telescopic opening 111 and a clearance adjusting threaded hole 112. The telescopic portion 1311 is telescopically fitted in the telescopic hole 111 to support the guide portion 1312, the gap-adjusting screw 133 is screw-fitted with the gap-adjusting screw hole 112, and the gap-adjusting screw 133 abuts on the guide portion 1312. After the gap-adjusting screw 133 is rotated, the tightness between the guide portion 1312 and the guide tube 12 is adjusted. When the gap adjusting screw 133 rotates in one direction, the gap between the adjusting guide 1312 and the guide tube 12 is adjusted to be loose; when the backlash adjustment screw 133 is rotated in the other direction, the tightening between the guide 1312 and the guide tube 12 is adjusted. Since the telescopic part 1311 and the guide part 1312 of the slider 131 are connected, when the gap-adjusting screw 133 is rotated and adjusted, the slider 131 is always engaged with the telescopic opening 111 of the center tube 11 through the telescopic part 1311, so that the telescopic direction of the slider 131 is guided and limited.

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

According to the utility model discloses elevating system 1 of oral cavity CBCT equipment 1000, through the cooperation of guide 1312 of slider 131 between well siphunculus 11 and the stand pipe 12, guide stand pipe 12 slides along the pipe length direction. Wherein, the clearance adjusting screw 133 capable of adjusting the distance between the guide part 1312 and the through pipe 11 is arranged, and the tightness between the guide part 1312 and the guide pipe 12 is adjusted by rotating the clearance adjusting screw 133. Therefore, the gap between the guide part 1312 and the guide pipe 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 1312 and the guide tube 12 is adjusted to be small or even no gap is formed, so that the shaking of the guide tube 12 during extension and contraction is reduced.

When the gap adjusting screw 133 rotates to adjust the gap, the slider 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 guaranteed. When the lifting mechanism 1 is used, the shaking in the lifting process can be reduced, the positioning accuracy in long-term use can be kept, and the shooting accuracy of the oral 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 wall between adjacent side edges of the polygonal tubes is a rib wall. The number of the edge walls of each polygonal tube is at least three, for example, the middle through tube 11 and the guide tube 12 are triangular tubes, and the middle through tube 11 and the guide tube 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 both pentagonal pipes, the middle through pipe 11 and the guide pipe 12 are respectively provided with five prismatic walls, and so on.

Wherein, clearance adjustment subassembly 13 includes a plurality of sliders 131, all connects at least one slider 131 on every arris wall of well siphunculus 11, has the clearance screw member 133 of transferring of cooperation on at least one slider 131.

The middle through pipe 11 and the guide pipe 12 are respectively formed into a polygonal pipe, and each edge wall is respectively matched with the sliding block 131, so that the guide pipe 12 can be guided along the circumferential multi-angle position. And the middle through pipe 11 and the guide pipe 12 form a polygonal pipe respectively, so that angle measurement and processing are convenient. This can improve the guiding accuracy.

In some embodiments, as shown in fig. 6 and 7, the middle through pipe 11 and the guide pipe 12 are square pipes, and each has four edge walls, and only the sliding blocks 131 on two adjacent edge walls are connected with the gap adjusting screw 133. Taking the orientation shown in fig. 6 as an example, the slide block 131 provided on the front side wall and the right side wall among the four walls has a gap adjusting screw 133 for adjusting the gap. And the slide block 131 arranged on the left side edge wall and the rear side edge wall is not provided with a clearance adjusting screw 133 for adjusting the clearance. Set up like this, make stand pipe 12 all can obtain adjusting in two directions of horizontally, need not all to adjust two sliders 131 of same direction, reduce the regulation degree of difficulty.

Of course, the scheme of the application can be subjected to more design changes. For example, in some embodiments, the middle through pipe 11 and the guide pipe 12 are square pipes, and the sliding block 131 on only one of the prism walls is connected with the gap-adjusting screw 133. For example, when the number of the rib walls of the center pipe 11 and the guide pipe 12 is changed, the slider 131 to which the gap adjusting screw 133 is connected can be selected.

In some embodiments, at least two gap adjusting screws 133 are connected to the sliding block 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 plane can be adjusted by the gap adjusting screws 133.

In some embodiments, as shown in fig. 6 and 7, the guiding portion 1312 is a flat plate, and the guiding portion 1312 has a larger contact area with the guiding tube 12, so as to improve the smoothness of the telescopic movement of the guiding tube 12. The gap adjusting threaded pieces 133 on the sliding block 131 connected with the gap adjusting threaded holes 112 are arranged in a plurality, and the gap adjusting threaded pieces 133 are arranged at intervals around the telescopic part 1311, so that the adjusting effect on the guide pipe 12 is more remarkable.

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

The gap adjusting screws 133 are provided in four on the slider 131 to which the gap adjusting screw holes 112 are connected, and are provided at four corners of the corresponding guide portions 1312.

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

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

When the supporting member 15 is a tube body, the positions of the middle through tube 11, the guide tube 12 and the supporting tube can be changed and combined to form various designs. To accommodate the variations, the equivalent structure on the three tubes may be adapted. The guide tube 12 and the support member 15 are mounted interchangeably with the center tube 11, such that the guide tube 12 is mounted on the outside and the support member 15 is mounted on the inside.

For example, 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 gap-adjusting screw 133 is installed on the middle through tube 11. At this time, as shown in fig. 6 and 5, the head of the gap-adjusting screw 133 is outward, and a tool avoiding hole 151 corresponding to at least a part of the gap-adjusting screw hole 112 is formed on the tube wall of the support tube. Thus, the gap adjustment screw 133 corresponding to the tool escape hole 151 can be rotated from the support pipe external tool to adjust the tightness of the guide pipe 12. 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 gap-adjusting screw 133, so that the tool avoiding hole 151 is not needed.

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 avoiding groove (not shown) corresponding to at least part of the gap adjusting threaded hole 112 may be provided on the guide tube 12.

In some embodiments, as shown in fig. 7, the gap-adjusting screw 133 is a cylindrical screw. In some embodiments, when the guide tube 12 is sleeved outside the middle through tube 11, the tail of the gap adjusting screw 133 is provided with an external thread to connect with the gap adjusting threaded hole 112, and the head of the gap adjusting screw 133 is provided with a notch, so that a tool can be inserted into the notch if a screwdriver is used, and at this time, the circumferential wall of the gap adjusting screw 133 may be provided with a circular ring plate, so that the circular ring plate abuts against the guide portion 1312. When the guide portion 1312 is screwed 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 surface of the middle tube 11 facing the support tube comprises: the contact mating surface 114 and the spacing surface 115, the contact mating surface 114 is in surface contact fit with the pipe wall of the support pipe, and the contact mating 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 from the wall of the support tube. The vents 111 are located on the contact mating face 114 and the spacing face 115.

Through the arrangement of the contact mating surface 114 and the spacing surface 115, the area of the mating of the slider 131 and the guide tube 12 can be ensured to be large enough, and the relatively high-precision machining area of the mating surface of the middle through tube 11 and the support member 15 is reduced, so that the cost is reduced to a certain extent, and the reliability of the design is increased.

The contact mating surface 114 is an annular surface that can fully limit the center 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 can be flexibly configured, for example, the spacing surface 115 can be a single segment, and the spacing surface 115 can also be configured into two segments.

The contact mating surface 114 is provided to restrict the through-tube 11 and the support tube from separating or shaking in a direction perpendicular to the mating surface. In addition, the intermediate pipe 11 and the guide pipe 12 are abutted by the gap adjusting screw 133, and at least the intermediate pipe 11 and the support pipe are restricted from being displaced in the direction in which the guide pipe 12 slides.

Alternatively, as shown in fig. 7, the guide tube 12 and the supporting member 15 may be formed by processing existing tubular profiles, the contact mating surface 114 is an outer side surface of the through-tube 11, and an inner side surface of the supporting member 15 has a corresponding contact surface, so that the processing precision requirement is relatively high. The spacing surface 115 is integrally shrunk inwards relative to the contact matching surface 114, and does not participate in surface-to-surface matching, so that the requirement on machining precision is relatively low.

In particular, the middle tube 11 and the support 15 need to be fixedly connected. The middle through pipe 11 is provided with a middle through hole 113, and the supporting member 15 is provided with a supporting hole 152, which are oppositely arranged and can be connected through a fastening member 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 access hole 151. This improves the appearance of the lifting mechanism 1. And due to the shielding of the end cover 14, the gap adjusting threaded part 133 is not easy to fall out.

In particular, the end cap 14 may be connected to the support tube or the central tube 11. For example, as shown in fig. 9, the end cap 14 is provided with an end cap one hole 141, and the top of the through-tube 11 is provided with a through-tube two hole 116, which are oppositely arranged and can be connected by a fastener such as a screw. The through holes 116 may now be provided as threaded holes.

Further, the end cap 14 includes a top ring plate 142 and an outer ring plate 144, the top ring plate 142 is located on the top of the middle tube 11 and the support tube, and the outer ring plate 144 connects the outer edge of the top ring plate 142 and then can cover the gap-adjusting screw 133 on the top. The shape of the end cover 14 is matched with the shape of the middle through pipe 11 and the support 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.

In the above embodiment, the slide block 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 component 16, the telescopic driving component 16 is arranged in the support tube or the guide tube 12, one end of the telescopic driving component 16 is provided with a rotatable first ear seat 162, the other end 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 guide tube 12, and the other is connected with the support tube.

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

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

Further, as shown in fig. 11, the elevator 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 a screw or the like.

According to the embodiment of the present invention, the rotating mechanism 2, as shown in fig. 12 and 13, includes a fixing plate 21 and a rotating plate 22, the rotating plate 22 is used for connecting the jaw support connecting member 26, and the jaw support 3 can be installed on the jaw support connecting member 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 that the rotating disc 22 is switched between the open position and the closed position. The turntable 22 is supported by the fixed disk 21, and the rotational stability can be improved.

Specifically, the fixing plate 21 is connected to the guide tube 12, so that the guide tube 12 can drive the rotating mechanism 2 to move up and down when stretching relative to the middle through tube 11.

Further, the telescopic driving unit 16 is coupled to the fixed plate 21, thereby reducing the difficulty of installation with the guide tube 12.

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

In some embodiments, as shown in fig. 13 and 14, the rotary mechanism 2 further comprises: a stopper disk 25, the stopper disk 25 being attached to the fixed disk 21, the turntable 22 being sandwiched between the stopper disk 25 and the fixed disk 21. The turntable 22 is also rotatably connected to the stopper disk 25, as it were. The turntable 22 is clamped between the stop disk 25 and the fixed disk 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 so set up, not only convenient assembly still enables the cooperation position and obtains the encapsulation, reduces impurity and advances the possibility of fitting surface.

In some embodiments, the rotary mechanism 2 further comprises: angle limiting component 23, angle limiting component 23 includes: a first stopper 231 and a second stopper 232.

The first stopper portion 231 is at least one, the first stopper portion 231 is connected to one of the detent disk 25 and the turntable 22, and the second stopper portion 232 is connected to the other of the detent disk 25 and the turntable 22. The second position-limiting portions 232 are provided two corresponding to each of the first position-limiting portions 231. The rotary plate 22 has a closed position and an open position, the first position-limiting portion 231 abuts against one of the two corresponding second position-limiting portions 232 in the closed position, and the first position-limiting portion 231 abuts against the other one of the two corresponding second position-limiting portions 232 in the open position.

Taking the first position-limiting portion 231 as an example, the number of the second position-limiting portions 232 is two, and a central angle between the two second position-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 position-limiting portions 231 is two or more, and the second position-limiting portions 232 can be flexibly disposed. Although the first position-limiting portion 231 may be one, when the first position-limiting portion 231 is two or more, the restriction of the turntable 22 in the open position and the closed position may be increased, and the reliability may be improved.

It should be noted that each of the first position-limiting portions 231 has two corresponding second position-limiting portions 232. The different first position-limiting portions 231 may not share the second position-limiting portion 232, or may share the second position-limiting portion 232. For example, when there are two first position-limiting portions 231, there may be three second position-limiting portions 232. When different first position-limiting portions 231 share the second position-limiting portion 232, the number of the second position-limiting portions 232 can be reduced.

When there are at least two first limiting portions 231, they may be distributed along the radial direction of the rotating disc 22, or may be distributed along the circumferential direction of the rotating disc 22, which is not limited herein.

In some embodiments, as shown in fig. 16, the first position-limiting portions 231 are two and are symmetrically distributed with respect to the rotation axis center of the turntable 22, as shown in fig. 14, the second position-limiting portions 232 are two and are symmetrically distributed with respect to the rotation axis center of the turntable 22, as shown in fig. 18 and 19, and the two first position-limiting portions 231 and the two second position-limiting portions 232 are alternately distributed along the circumferential direction. Thus, the two first position-limiting portions 231 share the two second position-limiting portions 232, one of the first position-limiting portions 231 is limited between one side of the two second position-limiting portions 232, and the other first position-limiting portion 231 is limited between the other side of the two second position-limiting portions 232. This ensures reliable parking of the disc 22 in both the open and closed positions and maximizes the use of the full angular space of the disc 22.

In some embodiments, at least one of the first position-limiting portion 231 and the second position-limiting portion 232 is provided with a magnetic portion 233, and in the closed position, the magnetic portion 233 keeps the first position-limiting portion 231 and the second position-limiting portion 232 attracted to each other.

Here, the magnetic part 233 may be provided only on the first position-limiting part 231, the magnetic part 233 may be provided only on the second position-limiting part 232, or the magnetic parts 233 may be provided on both the first position-limiting part 231 and the second position-limiting part 232.

According to the utility model discloses oral cavity CBCT equipment 1000's rotary mechanism 2, through first spacing portion 231 and the spacing portion 232 each other spacing of second, make carousel 22 can stop when rotating to open position or closed position, avoid carousel 22 even parts accidental injury user. Especially, the arrangement of the magnetic part 233 enables the rotary table 22 to be kept at the closed position when rotating to the closed position, so that the rotary table 22 is accurately positioned at the closed position and is not easy to shake when being in the closed position, thereby improving the shooting accuracy of the oral cavity CBCT device 1000. Moreover, since the rotary plate 22 is restrained by the magnetic attraction when in the closed position, if the user pushes the rotary plate 22 by mistake to rotate the rotary plate 22, the user can feel the change of the magnetic attraction when pushing by mistake, thereby playing a role of reminding the user.

Here, the structure of the magnetic part 233 is not limited, and the magnetic part 233 may be a separate component and fixed to the first and second position-limiting parts 231 and 232. In some embodiments, the magnetic part 233 and the first position-limiting part 231 are an integral component, for example, a magnet is used as the first position-limiting part 231. Or the magnetic part 233 and the second position-limiting part 232 are an integrated part, for example, a magnet is used as the second position-limiting part 232.

Specifically, the magnetic attraction part 233 may be fixed on the surfaces of the first and second position-limiting parts 231, 232, or may be embedded therein, which is not limited herein. The magnetic attraction part 233 may be a magnet, a magnetic powder, or an electromagnet.

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

As shown in fig. 19, the two second position-limiting portions 232 are provided with magnetic parts 233 at the same side in the circumferential direction, and the two magnetic parts 233 respectively stick to the two first position-limiting portions 231 in the closed position. By such an arrangement, the maximum suction force between the first and second limiting portions 231 and 232 can be achieved in the closed position, so that the rotating mechanism 2 is most stable in the closed position.

In the open position, as shown in fig. 18, the gap between the second position-limiting parts 232 reduces the attraction between the magnetic part 233 and the first position-limiting part 231, which facilitates the closing operation.

Specifically, the first position-limiting portion 231 is coupled to the bottom of the stopper disc 25, and the second position-limiting portion 232 is provided on the turntable 22, so that assembly is facilitated.

Further, the attracting force can be adjusted by the number of the magnetic parts 233 (e.g., magnets) and the size of the contact surface, and a plurality of the magnetic parts 233 can be arranged along the circumferential direction and/or the radial direction of the turntable 22.

In some embodiments, the stopper disk 25 is provided with a stopper shaft 251, an end of the stopper shaft 251 is connected to the fixed disk 21, and the rotation disk 22 includes: the inner sleeve 221 and the inner sleeve 221 are 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 located between the inner sleeve 221 and the outer sleeve 222. The outer casing 222 thus encapsulates the mounting surface, reducing wear.

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

Specifically, the end of the stopper shaft 251 is a square shaft 2511, the fixed disk 21 is provided with a square groove 212, and the square shaft 2511 is inserted and fitted in 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 have other non-circular shapes as long as they are adapted to each other.

Further, the rotating mechanism 2 further includes a sleeve 27 fitted between the stopper shaft 251 and the inner sleeve 221, thereby constituting a sliding bearing pair to reduce the rotating friction.

Alternatively, as shown in fig. 13, the fixed disk 21 is provided with a shaft rotation groove 213, and one end of the sleeve 27 is fitted in the shaft rotation groove 213. This improves the ease of assembly and the pivot slots 213 provide a restraint for the sleeve 27 to reduce friction.

Alternatively, the shaft rotation groove 213 is a circular groove, not restricting the rotation of the sleeve 27.

In some embodiments, as shown in fig. 14, the square shaft 2511 is provided with a threaded shaft fastening hole 2512 at the bottom, as shown in fig. 15, the fixed plate 21 is provided with a shaft fastening connection hole 214 at the bottom, and the threaded connector is connected to the threaded shaft fastening hole 2512 through the shaft fastening connection 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 position-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 plate 22 further includes an adapter 223 for connecting the jaw support connector 26. Optionally, the adapter 223 is integrally formed on the outer sleeve 222.

In some embodiments, the turntable 22 further comprises a bottom ring 224, and the bottom ring 224 is connected to the bottom of the outer sleeve 222 and the inner sleeve 221 to improve the overall structural strength.

In some embodiments, the rotary mechanism 2 further comprises: a power-off protection detector 241, the power-off protection detector 241 being adapted to detect the position of the turntable 22 to issue a protection signal when the turntable 22 leaves the closed position. Thus, in use, if the C-arm 300 is rotated to photograph and the jaw 3 is mistakenly pushed away from the closed position, the power-off protection detector 241 can immediately send out a protection signal to prevent the jaw 3 from hitting the C-arm 300. Of course, the protection signal may stop the rotation of the C-arm 300 or reset the C-arm 300, which is not limited herein.

In some embodiments, as shown in fig. 15, the fixing plate 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 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 to the detection hole 225 in the closed position. When the turntable 22 is moved away from the closed position, the bottom of the turntable 22 blocks the mounting hole 211, and in the open position shown in fig. 18, only the detection hole 225 is exposed from above the turntable 22 due to the movement away from the closed position, and the mounting hole 211 and the power-off protection detector 241 are covered. Therefore, 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 in the direction of the rotation axis of the turntable 22. In the closed position, the detection aperture 225 is opposite the mounting aperture 211 and the outage protection detector 241 does not detect a signal and the device, such as an oral CT, is in normal use. When the bottom of the rotary plate 22 blocks the mounting hole 211 after leaving the closed position, the power-off protection detector 241 detects a signal (e.g., a signal of metal detection) to activate 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 sensors with lower cost, such as a light sensor. Of course, the present disclosure is not limited thereto, and for example, the power outage protection detector 241 may select a pressure sensor that is pressed by the first stopper portion 231 when in the closed position and that is changed when being separated, thereby outputting a protection signal. When the power down protection detector 241 selects another sensor, the detection position may be adaptively adjusted.

In some embodiments, the mounting hole 211 penetrates the fixed disk 21 in the axial direction of the turntable 22, and the power outage protection detector 241 is connected to the fixed disk 21 through a mounting seat 242, the mounting seat 242 being located on a side of the fixed disk 21 away from the turntable 22. This makes the power-off protection detector 241 more stable on the fixed disk 21 and reduces the difficulty of installation.

Specifically, as shown in fig. 13, the mounting seat 242 includes a first mounting part 2421 and a second mounting part 2422, a groove is formed on the first mounting part 2421, the power-off protection detector 241 is inserted into the groove, and then the second mounting part 2422 is connected to the first mounting part 2421 to close the groove, so that the power-off protection detector 241 is fixed. Thus, the line connection of the power-off protection detector 241 can be protected by the mounting seat 242.

According to the utility model discloses oral cavity CBCT equipment 1000's lift rotary device 100, include: the lifting mechanism 1 and the rotating mechanism 2 according to the above-described embodiment. The lifting mechanism 1 is the lifting mechanism 1 described in the above embodiments, and details are not described here. The rotating mechanism 2 is the rotating mechanism 2 described in the above embodiments, and will not be described herein.

According to the utility model discloses oral cavity CBCT equipment 1000's lift rotary device 100 through setting up above-mentioned elevating system 1, has reduced rocking of lift in-process, makes the jaw hold in the palm the location accuracy of connecting piece 26, improves oral cavity CBCT equipment 1000 and shoots the accuracy.

Specifically, the lifting mechanism 1 is vertically arranged, the middle through pipe 11 is connected to the upper end of the support member 15, and the guide pipe 12 is retractable from the upper end of the middle through pipe 11. The rotating mechanism 2 comprises a fixed disc 21, a rotary disc 22 and a jaw support connecting piece 26 connected with the rotary disc 22, wherein the fixed disc 21 is connected to the upper end of the guide tube 12, and the rotary disc 22 is rotatably connected to the fixed disc 21. Thus being convenient for the patient to fix the skull in sitting or standing position.

According to the utility model discloses oral cavity CBCT equipment 1000, include: the lifting and rotating device 100 of the oral CBCT apparatus 1000 according to the above-described embodiment.

According to the utility model discloses oral cavity CBCT equipment 1000 through setting up above-mentioned elevating system 1, has reduced rocking of lift in-process, makes the jaw hold in the palm the location accuracy of connecting piece 26, improves oral cavity CBCT equipment 1000 and shoots the accuracy.

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

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

Fig. 5 is an exploded view of the lifting and rotating device 100 in this embodiment, which is composed of a stop disk 25, a magnet (magnetic attraction part 233), a turntable 22, a shaft sleeve 27, a fixed disk 21, a power-off protection detector 241, a mounting seat 242, a connecting disk 121, a guide tube 12, an end cover 14, a jackscrew (gap adjusting screw 133), a through tube 11, a slider 131, a support member 15, a mounting base plate 17, a first ear seat 162, a pin 164, a push rod motor 161, and a second ear seat 163. The stopper disk 25, the magnet, the turntable 22, the sleeve 27, the fixed disk 21, the electricity loss protection detector 241, and the mount 242 constitute the rotating mechanism 2, as shown in fig. 12 and 13. The turntable 22 is a rotating member, the other members are fixed members, the shaft sleeve 27 is firstly installed in the turntable 22, the bosses on both sides of the stop disk 25 form a second limiting portion 232, and the second limiting portion and the magnet are fixedly connected into a whole (see fig. 14) and then installed in the shaft sleeve 27. The middle structure (such as a rib plate) of the turntable 22 forms a first limiting part 231, and the magnet is contacted with the middle structure (such as a rib plate) of the turntable 22 and then is attracted, so that the turntable 22 is restrained and fixed.

The lower end of the stopping disk 25 is a square shaft 2511 which is matched with the square groove 212 of the fixed disk 21, and the bottom of the stopping disk 25 is connected by screws so as to fixedly connect the stopping disk 25 and the fixed disk 21 into a whole. In the closed position of fig. 19, which corresponds 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 of fig. 18, i.e. corresponding to position a of fig. 2, the turntable 22 is rotated and the magnet is separated from the rib, and when the boss for fixing the magnet abuts against the rib, position a is reached and no further rotation in this direction is possible, and rotation in the opposite direction causes the magnet to reach the rib position and engage with the rib, position B. When the patient is supported by the jaw support 3, the pressure on the side is small because the magnet is attracted with the ribbed plate when the position B is located, so that the situation that the head fixing device leaves the position B in the shooting process can be prevented.

The power-off protection detector 241 is connected to the fixed plate 21 through a mounting seat 242, and the detection end passes through the mounting hole 211 of the fixed plate 21 and aligns 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 detection hole 225 is staggered with the mounting hole 211, the mounting hole 211 is shielded by the bottom of the rotary table 22, the power-off protection detector 241 can detect the change and send a signal, and then the power supply (motor power supply) is immediately cut off, so that the safety protection effect is achieved. 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 supply 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 openings 111 for mounting the sliding block 131, and small rectangular bosses on the sliding block 131 are telescopic parts 1311 which are just matched with the rectangular telescopic openings 111 of the middle through pipe 11.

The large rectangular block of the slide block 131 is a guide part 1312, one surface of the guide part 1312 is attached to the inner side of the middle through pipe 11, and the attaching gap is adjusted by the depth of the top thread screwed into the gap adjusting threaded hole 112 of the middle through pipe 11. The deeper the screw is screwed, the greater the clearance between the tail end of the screw and the guide 1312, and the tighter the slide 131 fits into the guide tube 12.

After the guide part is installed, the guide part is placed in a tubular support member 15, the 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 to form the lifting mechanism 1. The end cover 14 is used for shielding a side jackscrew to achieve an attractive effect, the guide pipe 12 is attached to the four-side sliding block 131 after being placed in, and the tightness and the guiding performance of the up-and-down lifting of the guide pipe 12 are controlled by adjusting the jackscrew. The connecting disc 121 is welded with the square tube of the guide tube 12 to form a whole, and is mainly used for connecting the rotating mechanism 2, as shown in fig. 9. The upper end and the lower end of the push rod motor 161 are hinged with a first ear seat 162 and a second ear seat 163 through a pin 164, the first ear seat 162 is connected with the fixed disk 21 of the rotating mechanism 2, the second ear seat 163 is connected with the installation bottom plate 17, and then the installation bottom plate 17 is connected with the supporting piece 15. Then, the fixed disk 21 and the connecting disk 121 are connected by screws, so that the rotating mechanism 2 and the lifting mechanism 1 are fixedly connected into a whole, the rotating mechanism 2 can electrically lift along with the guide pipe 12, and the whole lifting and rotating device 100 is shown in fig. 11 and 3.

By integrating the whole operation process, when the rotating mechanism 2 is in the open position, the patient sits in place. The operating personnel promotes jaw support connecting piece 26 to the shooting position, because the effect of magnet, jaw support connecting piece 26 can be fixed by the actuation, and does not have and rocks, and the location is accurate reliable. Then the up-down distance of the lifting rotating mechanism 2 is electrically adjusted to the designated position according to the mandible position of the patient. After shooting, operating personnel pulls open jaw support connecting piece 26 again, lets the patient leave, and whole operation process is convenient, swift. Meanwhile, a power-off protection detector 241 is arranged in the device, and when the patient operates by mistake, the power supply can be immediately triggered and cut off, so that the safety protection effect is achieved.

The lifting and rotating device 100 is simple and reliable, and when the device reaches a shooting position, the lifting and rotating device 2 can be automatically attracted and fixed under the action of the magnet, so that the positioning is accurate and reliable. The magnet is arranged in the device, so that safety risks such as hand clamping and the like can be avoided during suction. The power-off protection detector 241 is also arranged in the device, and when the rotating mechanism 2 is pushed away by misoperation of a patient, the power supply can be immediately cut off, so that the safety of the patient is guaranteed. Lifting and rotating mechanism 2 can adjust jaw support 3 to suitable position according to the patient of different sizes, guarantees patient's travelling comfort. Meanwhile, the tightness degree and the guiding performance of lifting guiding can be adjusted by adjusting the screwing-in depth of the jackscrew. After shooting, only need with the jaw support connecting piece 26 pull open can, and press the dynamics of pulling open adjustable, simple, convenient.

In the description herein, references to the description of the terms "embodiment," "example," etc., mean 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, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. 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: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims (11)

1. A rotary mechanism of oral CBCT equipment, characterized by includes:

fixing the disc;

the stop disc is connected with the fixed disc;

a turntable rotatably connected to the stopping disk;

the spacing subassembly of angle, the spacing subassembly of angle includes:

the first limiting part is at least one, and the first limiting part is connected with one of the stop disc and the turntable;

the second limiting part is connected with the other one of the stop disc and the rotary disc, and the number of the second limiting parts is two corresponding to each first limiting part;

the turntable is provided with a closed position and an open position, the first limiting part abuts against one of the two corresponding second limiting parts in the closed position, and the first limiting part abuts against the other one of the two corresponding second limiting parts in the open position; and the number of the first and second electrodes,

at least one of the first limiting part and the second limiting part is provided with a magnetic part, and the first limiting part and the second limiting part are kept mutually attracted in the closed position.

2. The rotating mechanism of the oral cavity CBCT apparatus of claim 1, wherein the first limiting portions are two and are symmetrically distributed with respect to the rotation axis of the rotating disc, the second limiting portions are two and are symmetrically distributed with respect to the rotation axis of the rotating disc, and the two first limiting portions and the two second limiting portions are alternately distributed along the circumferential direction.

3. The rotary mechanism of oral CBCT apparatus of claim 2, wherein the first position-limiting portion is fixed relative to the turntable and the second position-limiting portion is fixed relative to the stop disk;

two spacing portion of second all is equipped with same one side in circumference the portion is inhaled to magnetism, just closed position two magnetism are inhaled the portion and are pasted two respectively first spacing portion.

4. The rotary mechanism of the oral CBCT apparatus of claim 1, further comprising: a power-off protection detector for detecting a position of the turntable to issue a protection signal when the turntable leaves the closed position.

5. The oral cavity CBCT apparatus rotation mechanism of claim 4, wherein the power-off protection detector and the second limiting portion are both fixed relative to the stopper disk, the power-off protection detector being disposed adjacent to one of the second limiting portions.

6. The rotating mechanism of oral CBCT equipment of claim 5, wherein 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 rotary table covers the mounting hole after the rotary table leaves the closed position.

7. The rotating mechanism of oral cavity CBCT equipment of claim 6, wherein the mounting hole penetrates the fixed disc in the axial direction of the turntable, the power-off protection detector is connected on the fixed disc through a mounting seat, and the mounting seat is positioned on one side of the fixed disc far away from the turntable.

8. The rotary mechanism of oral cavity CBCT equipment of claim 1, characterized in that, the stop disc is provided with a stop shaft, the end of the stop shaft is connected with the fixed disc, the rotary disc comprises: 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.

9. The rotary mechanism of oral CBCT apparatus in claim 8, wherein the fixing disc is provided with a rotation groove, the rotary mechanism further comprises a shaft sleeve sleeved between the stopping shaft and the inner sleeve, one end of the shaft sleeve is fitted in the rotation groove.

10. The rotating mechanism of the oral CBCT device as claimed in claim 8, wherein the end of the stop shaft is a square shaft, and the bottom of the square shaft is provided with a shaft fixing threaded hole;

the fixed disk is provided with a square groove matched with the square shaft, the bottom of the fixed disk is provided with a shaft fixing connecting hole, and the threaded connecting piece is connected with the shaft fixing threaded hole through the shaft fixing connecting hole.

11. An oral CBCT apparatus, comprising: the rotary mechanism of the oral CBCT apparatus of any of claims 1-10, wherein the turntable is connected with a jaw support connector.

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