A multi-mode oral CBCT device

Abstract

The present invention discloses a multi-mode oral CBCT device, which belongs to the technical field of medical devices. The present invention is scientific and reasonable, safe and convenient to use, and includes a lifting base, a jaw support mechanism, an L-arm mechanism, a rotary driven mechanism and a lateral detection mechanism; the lifting base is fixed on the ground, the jaw support mechanism is located on one side of the lifting base, the L-arm mechanism is fixed at the top of the lifting base, the rotary driven mechanism is rotatably connected to the bottom of the L-arm mechanism, and the lateral detection mechanism is fixed at the side end of the L-arm mechanism. The rotary mechanism of the present invention is located above the L-arm mechanism, the center of gravity of the structure moves upward, the moment of inertia is reduced, the stability of product performance is increased, the imaging is more accurate, and the service life of the product is extended. In addition, the detector and tube structure are simplified and the pressure of the lifting base is reduced. An automatic angle adjustment mechanism is set to use the weight of the chin to drive the cheek correction mechanism to automatically adjust, so that medical staff do not need to adjust the position of the patient's head, saving time for medical staff.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, in particular to a multi-mode oral CBCT device. Background Art

[0002] As an X-ray imaging device, oral cone beam CT has played a huge role in the medical field since the beginning of the 21st century. The cone beam volume images obtained by this technology can help clinicians make better diagnoses of patients. In actual clinical applications, CBCT technology effectively solves the problems of image overlap and distortion in two-dimensional imaging. It solves most medical problems in dental implants, maxillofacial surgery, and periodontal diseases through three-dimensional imaging. This technology is of great significance to the future development and research in the medical field.

[0003] At present, the rotating imaging mechanism of some oral CBCT products on the market is located below the support arm. The center of gravity of such a structure is too low and the moment of inertia is large, which is not conducive to the performance stability of the product and affects the service life of the product. The overall structural rigidity of the machine will also be affected, and the requirements for the lifting column are also higher. In addition, the structure of the radiation source rotating mechanism in the rotating imaging mechanism is not streamlined enough and is heavy, which directly leads to a greater increase in the weight of the detector end in order to balance the weight of this structure, resulting in the entire rotating imaging mechanism. The weight is too large, the pressure on the column is increased, and it is easy to cause bending deformation and a short life. Secondly, the height of the internal components of the existing device is relatively high after being lifted up and down, which is easy to cause the column to be unstable, resulting in a decrease in the accuracy of the photographic results. Finally, the existing device requires medical personnel to adjust the position of the patient's head, which is inconvenient to use. Therefore, people need a multi-mode oral CBCT device to solve the problems raised in the prior art. Summary of the invention

[0004] The object of the present invention is to provide a multi-mode oral CBCT device to solve the problems raised in the prior art.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a multi-mode oral CBCT device, characterized in that it includes a lifting base, a jaw support mechanism, an L-arm mechanism, a rotary driven mechanism and a lateral detection mechanism; the lifting base is fixed on the ground, the jaw support mechanism is located on one side of the lifting base, the L-arm mechanism is fixed at the top of the lifting base, the rotary driven mechanism is rotatably connected to the bottom of the L-arm mechanism, and the lateral detection mechanism is fixed at the side end of the L-arm mechanism. The lifting base is conducive to supporting the entire device, the jaw support mechanism is conducive to placing the mandible and using the weight of the patient's head to make the device automatically fit the face, without the need for medical staff to adjust, which is convenient and quick. The L-arm mechanism is conducive to fixing the rotary driven mechanism and the lateral detection mechanism.

[0006] Preferably, the jaw support mechanism includes a connecting elbow, a jaw support mechanism shell, an automatic angle adjustment mechanism, and a cheek correction mechanism; the connecting elbow is fixed on one side of a lifting base, a jaw support mechanism shell is provided above the connecting elbow, and the automatic angle adjustment mechanism and the cheek correction mechanism are installed on both sides of the base of the jaw support mechanism shell; the connecting elbow is conducive to fixing the jaw support mechanism shell on the lifting base, and can move up and down synchronously with the lifting base; the automatic adjustment mechanism and the cheek correction mechanism are conducive to automatically adjusting the cheek to the correct position.

[0007] The automatic angle adjustment mechanism includes a chin platform, a pressure outer cylinder, a telescopic rod and a first slide rail; a tooth support is fixed on the chin platform, and a pressure outer cylinder is slidably matched under the chin platform, and the lower end of the pressure outer cylinder passes through the outer shell of the jaw support mechanism and is fixed on the base of the outer shell of the jaw support mechanism; a first laser positioning light is fixed on one side of the lower end of the pressure outer cylinder; a telescopic rod is provided below the first laser positioning light, one end of the telescopic rod is slidably matched with the side hole of the pressure outer cylinder, and a sliding block is fixed on the other end of the telescopic rod, and the sliding block is located on the first slide rail; the tooth support is conducive to the patient's occlusion, and the chin platform is conducive to the placement of the chin; the pressure outer cylinder is conducive to driving the telescopic rod to move outward after receiving the pressure of the chin, thereby driving the sliding block to move outward synchronously; the first laser positioning light is conducive to determining whether the patient's head is in the middle and vertical state; the first slide rail is conducive to the sliding of the sliding block;

[0008] The cheek alignment mechanism comprises a cheek alignment rod, a rotating platform, a limiting clip, a reset spring sheet and a swing block. The cheek alignment rod is symmetrically arranged outside the upper part of the jaw support mechanism housing, and a horizontal axis is connected below the cheek alignment rod, and the horizontal axis passes through a number of rotating platforms, and a swing block is connected to the other end of the horizontal axis; the swing block keeps in contact with the outer edge of the sliding block; a number of the rotating platforms are fixed on the base of the jaw support mechanism housing, and a limiting clip is clamped on the horizontal axis, and the limiting clip is close to the rotating platform; a reset spring sheet is connected between the rotating platform and the swing block that are closer to the swing block. The cheek alignment rod is conducive to adjusting the patient's face position; the sliding block is conducive to driving the swing block to move synchronously with the telescopic rod, and the swing block is conducive to driving the cheek alignment rod to swing; after the patient's chin leaves the chin platform, the reset spring sheet is conducive to pushing the swing block back to its original position, the swing block pushes the sliding block back to its original position, and the telescopic rod moves synchronously, which is conducive to the chin platform being lifted to its original position by pressure; the limiting clip is conducive to limiting the axial movement of the cheek alignment rod horizontal axis.

[0009] Preferably, the L-arm mechanism comprises an L-arm skeleton, a first motor, a first photoelectric switch, a rotation drive mechanism and a rotation mechanism; the rotation mechanism is located at one end above the L-arm skeleton, a rotation drive mechanism is provided on one side of the rotation mechanism, the first motor is located on one side of the rotation drive mechanism, and the first motor drives the rotation mechanism and the rotation drive mechanism; the first photoelectric switch is fixed on the inner side of one end of the L-arm skeleton;

[0010] The rotary drive mechanism comprises a second motor, a first pulley, a second pulley and a sliding base plate; a sliding base plate is provided at the bottom of the rotary drive mechanism, a second motor is fixed on the sliding base plate, a first pulley is provided on the output shaft of the second motor, a second pulley is provided on one side of the sliding base plate, a synchronous belt is connected between the first pulley and the second pulley, and the first pulley and the second pulley are respectively meshed with the synchronous belt for transmission; the second motor is conducive to driving the first pulley to rotate synchronously, and the synchronous belt is conducive to driving the second pulley to rotate synchronously;

[0011] The rotating mechanism includes a third pulley, a rotating block, a limit stop, a corresponding photoelectric switch, a second photoelectric switch and a rotating connecting cylinder; the third pulley is rotatably fixed and passes through the sliding base plate, the third pulley is connected to the second pulley through a synchronous belt, the rotating block is fixed above the third pulley and rotates synchronously, the limit stop is located above the rotating block, a corresponding photoelectric switch is provided on the limit stop, a second photoelectric switch is provided below the corresponding photoelectric switch, and the rotating connecting cylinder is fixed below the third pulley and rotates synchronously with the third pulley; the synchronous belt is conducive to driving the third pulley to follow the first pulley and the second pulley to rotate synchronously; the third pulley is conducive to driving the rotating connecting cylinder to rotate; the corresponding photoelectric switch and the second photoelectric switch are conducive to transmitting high and low level signals, which is conducive to the control center to control the deceleration and resetting of the first motor and the second motor to prevent winding and further failures.

[0012] Preferably, the rotating driven mechanism comprises a rotating bracket, a tube rotating driving mechanism, a radiation shielding mechanism and a first detector; the rotating bracket is fixed below the rotating connecting tube, the tube and the control box are fixed at both ends of the rotating bracket, and the tube rotating driving mechanism is provided on the side of the rotating bracket located on the tube; the first detector is provided on one side of the control box, and a radiation shielding mechanism is provided opposite to the first detector, and the radiation shielding mechanism is located inside the tube; the rotating bracket is conducive to connecting the tube and the control box; the tube rotating driving mechanism is conducive to driving the tube to rotate to a suitable angle;

[0013] The ball tube rotation driving mechanism includes a third motor, a driven limit block, a first lead screw nut, a driving arm and a ball tube rotating shaft; the third motor is fixed on the rotating bracket, and the other end of the third motor is fixed with the first lead screw nut, the first lead screw nut is connected with the driven limit block, and a driving arm is provided on one side of the driven limit block; the other end of the driving arm is provided with a ball tube rotating shaft, and the driving arm is rotatably connected with the ball tube rotating shaft; the third motor is conducive to driving the first lead screw nut to move linearly, thereby driving the driven limit block to move synchronously, and the bottom of the driven limit block is close to the surface of the rotating bracket, so the driven limit block will not swing left and right, and the driving arm moves synchronously with the driven limit block; since the driving arm is rotatably connected with the ball tube rotating shaft, the ball tube rotating shaft is driven to rotate, thereby driving the ball tube to rotate to a suitable angle.

[0014] The ray shielding mechanism includes a fourth motor, a second lead screw nut, a second slide rail, a mode selection shielding plate, a third photoelectric switch, a second laser positioning light and a third laser positioning light; the fourth motor is connected to the mode selection shielding plate through the second lead screw nut, and the mode selection shielding plate is located on the second slide rail; a third laser positioning light is provided on one side of the mode selection shielding plate, and a second laser positioning light is provided below the fourth motor. The fourth motor is conducive to driving the second lead screw nut to move, thereby driving the mode selection shielding plate to move back and forth along the second slide rail. The mode selection shielding plate has different opening sizes according to different modes, which is conducive to selecting a suitable exposure position according to different photography modes; the second laser positioning light and the third laser positioning light have the same function as the first laser positioning light, and the two cooperate with each other to put the patient's head in the most accurate position and improve the quality of the photographic image.

[0015] Preferably, the lateral position detection mechanism includes a lateral position rod, a lateral position mounting platform, a patient head posture adjustment mechanism and a second detector; one end of the lateral position rod is fixed to one side of the L-arm frame, the other end of the lateral position rod is fixed to the lateral position mounting platform, and the head posture adjustment mechanism is arranged in the middle of the lateral position mounting platform; the lateral position rod is conducive to fixing the lateral position detection mechanism on the L-arm frame; a second detector 540 is arranged below one side of the lateral position mounting platform 520;

[0016] The patient head posture adjustment mechanism includes a front adjustment slider, a first light rod, a front dental tray, a side adjustment slider, a second light rod and a side earplug; the front adjustment slider is slidably connected to the first light rod, and the front dental tray is connected below the front adjustment slider; a side adjustment slider is provided on one side of the front adjustment slider, the side adjustment slider is slidably connected to the second light rod, and the side earplug is connected below the side adjustment slider. The front adjustment slider and the first light rod are slidably matched, which is conducive to freely adjusting the distance between the front dental tray and the oral cavity, and the side adjustment slider and the second light rod are slidably matched, which is conducive to freely adjusting the distance between the side earplug and the ear. In addition, there are adjustment structures on the front dental tray and the side earplug components, which are conducive to adjusting the corresponding components to a suitable height.

[0017] Preferably, after the third pulley rotates 400°, the first motor and the second motor decelerate and reset.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] 1. The present invention has a high degree of modularization, is easy to install, debug and transport, and optimizes the structure of each component through finite element simulation, reduces the weight of the whole machine, reduces costs, improves reliability and service life; the rotating mechanism is located above the L-arm mechanism, and the center of gravity of such a structure moves upward, the moment of inertia is reduced, the performance stability of the product is increased, the imaging is more accurate, and the service life of the product is extended. In addition, the rotating driven mechanism and the detector and tube structure below it are streamlined, the weight is reduced, the pressure on the lifting base is reduced, and the service life is extended.

[0020] 2. The present invention supports the rotating mechanism through an L-arm skeleton. In CT and panoramic modes, after adjusting the patient's head position through multiple laser positioning lights, the rotating imaging mechanism rotates around the head to scan and image. The patient does not need to move, and the patient's chin is supported throughout the process, which improves the patient experience. An automatic angle adjustment mechanism is set up to use the weight of the head to drive the cheek alignment mechanism to automatically adjust, which helps to adjust the patient's head to the appropriate position for scanning. Medical staff do not need to adjust the patient's head position, saving time for medical staff.

[0021] 3. The lateral detection mechanism of the present invention is supported by a lateral rod. In the lateral mode, the head posture is adjusted by adjusting the height of the front mouthpiece and the side earplug and the distance from the patient's head, which is conducive to achieving optimal image quality.

[0022] 4. In the present invention, multiple movements such as linear movement, rotational movement and tube rotational movement all use photoelectric switches to control the movement position and angle to achieve precise position control, which not only improves the scanning accuracy but also ensures the safety of the machine.

[0023] 5. According to different scanning modes, this machine can select different radiation exit hole sizes through the radiation shielding mechanism to achieve the purpose of keeping the radiation dose as low as possible. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a schematic diagram of the overall structure of a multi-mode oral CBCT device of the present invention;

[0025] Figure 2 It is a structural schematic diagram of a jaw support mechanism of a multi-mode oral CBCT device of the present invention;

[0026] Figure 3 It is a schematic structural diagram of an L-arm mechanism of a multi-mode oral CBCT device of the present invention;

[0027] Figure 4 It is a structural schematic diagram of a rotary drive mechanism and a rotary mechanism of a multi-mode oral CBCT device of the present invention;

[0028] Figure 5It is a structural schematic diagram of a rotary driven mechanism of a multi-mode oral CBCT device of the present invention;

[0029] Figure 6 It is a structural schematic diagram of a ray shielding mechanism of a multi-mode oral CBCT device of the present invention;

[0030] Figure 7 It is a structural schematic diagram of a lateral position detection mechanism of a multi-mode oral CBCT device of the present invention;

[0031] Figure 8 This is a schematic structural diagram of a patient head posture adjustment mechanism of a lateral position detection mechanism of a multi-mode oral CBCT device of the present invention.

[0032] Numbers in the figure: 100, lifting base; 200, jaw support mechanism; 300, L-arm mechanism; 400, rotary driven mechanism; 500, lateral position detection mechanism; 210, connecting elbow; 220, jaw support mechanism shell; 230, angle automatic adjustment mechanism; 231, tooth support; 232, chin table; 233, pressure outer cylinder; 234, first laser positioning light; 235, telescopic rod; 236, sliding block; 237, first slide rail; 240, cheek alignment Mechanism; 241, cheek correction rod; 242, rotating table; 243, limit clip; 244, reset spring; 245, swing block; 310, L-arm frame; 320, first motor; 330, first photoelectric switch; 340, rotation drive mechanism; 341, second motor; 342, first pulley; 343, second pulley; 344, sliding bottom plate; 350, rotating mechanism; 351, third pulley; 352, rotating block; 353, limit stopper ; 354, photoelectric switch; 355, second photoelectric switch; 356, rotating connecting tube; 410, rotating bracket; 420, tube rotating drive mechanism; 421, third motor; 422, driven limit block; 423, first lead screw nut; 424, driving arm; 425, tube shaft; 430, tube; 440, ray shielding mechanism; 441, fourth motor; 442, second lead screw nut; 443, second slide rail; 444, mode selection shielding Baffle; 445, third photoelectric switch; 446, second laser positioning light; 447, third laser positioning light; 450, control box; 460, first detector; 510, lateral rod; 520, lateral mounting platform; 530, patient head posture adjustment mechanism; 540, second detector; 531, front adjustment slider; 532, first optical rod; 533, front dental tray; 534, lateral adjustment slider; 535, second optical rod; 536, lateral earplug. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0034] Example: Figure 1-8 As shown, a multi-mode oral CBCT device is characterized by comprising a lifting base 100, a jaw support mechanism 200, an L-arm mechanism 300, a rotary driven mechanism 400 and a lateral position detection mechanism 500; the lifting base 100 is fixed on the ground to support the entire device; the jaw support mechanism 200 is located at one side of the lifting base 100, and is used to place the mandible and use the weight of the patient's head to make the device automatically fit the face, without the need for medical staff to adjust, which is convenient and fast; the L-arm mechanism 300 is fixed at the top of the lifting base 100, the rotary driven mechanism 400 is rotatably connected to the bottom of the L-arm mechanism 300, and the lateral position detection mechanism 500 is fixed at the side end of the L-arm mechanism 300.

[0035] The jaw support mechanism 200 includes a connecting elbow 210, a jaw support mechanism shell 220, an automatic angle adjustment mechanism 230, and a cheek correction mechanism 240; the connecting elbow 210 is fixed to one side of the lifting base 100, and can move up and down synchronously with the lifting base 100; a jaw support mechanism shell 220 is provided above the connecting elbow 210, and the automatic angle adjustment mechanism 230 and the cheek correction mechanism 241 are installed on both sides of the base of the jaw support mechanism shell 220, and are used to automatically adjust the cheeks to the correct position.

[0036] The automatic angle adjustment mechanism 230 includes a chin platform 232, a pressure outer cylinder 233, a telescopic rod 235 and a first slide rail 237; a tooth support 231 is fixed on the chin platform 232 for the patient to bite; a pressure outer cylinder 233 is slidably matched below the chin platform 232, and the lower end of the pressure outer cylinder 233 passes through the jaw support mechanism shell 220 and is fixed on the base of the jaw support mechanism shell 220; a first laser positioning light 234 is fixed to one side of the lower end of the pressure outer cylinder 233; a telescopic rod 235 is provided below the first laser positioning light 234, one end of the telescopic rod 235 is slidably matched with the side hole of the pressure outer cylinder 233, and a sliding block 236 is fixed to the other end of the telescopic rod 235, and the sliding block 236 is located on the first slide rail 237;

[0037] The cheek alignment mechanism 240 includes a cheek alignment rod 241, a rotating platform 242, a limiting clip 243, a reset spring 244 and a swing block 245. The cheek alignment rod 241 is symmetrically arranged outside the upper part of the jaw support mechanism housing 220, and a horizontal axis is connected to the lower part of the cheek alignment rod 241, which passes through a plurality of rotating platforms 242, and a swing block 245 is connected to the other end of the horizontal axis; the swing block 245 keeps contact with the outer edge of the sliding block 236; a plurality of rotating platforms 242 are fixed on the base of the jaw support mechanism housing 220, and a limiting clip 243 is clamped on the horizontal axis, and the limiting clip 243 is close to the rotating platform 242; a reset spring 244 is connected between the rotating platform 242 closer to the swing block 245 and the swing block 245.

[0038] The patient faces the lifting column and bites the tooth support 231 with his teeth. When the machine is installed, a certain volume of gas or liquid is filled in the pressure outer cylinder 233. When the patient's chin is placed on the chin platform 232, the chin platform 232 will be pressed down a certain distance by gravity with the help of the patient's head weight. Inside the pressure outer cylinder 233, air pressure or hydraulic pressure is transmitted, and the pressure drives the telescopic rod 235 to move outward, driving the sliding block 236 to move outward synchronously. Since the outer edge of the sliding block 236 keeps in contact with the swing block 245, the swing block 245 drives the cheek correction rod 241 to rotate, and the cheek correction rods 241 on both sides are synchronously attached to the patient's face. At this time, the reset spring sheet 244 is in a stressed state, and the first laser positioning lamp 234 emits a vertical light, shining on the middle of the patient's face. The doctor uses the position of the light to make the patient's head as centered and vertical as possible. When the internal pressure of the automatic angle adjustment mechanism 230 is rebalanced, the chin table 232 maintains a constant height. After the scan is completed, the patient's chin leaves the chin table 232. At this time, the reset spring sheet 244 pushes the swing block 245 back to its original position. The swing block 245 pushes the sliding block 236 to move linearly along the first slide rail 237 back to its original position. The telescopic rod 235 moves synchronously. The movement of the telescopic rod 235 into the pressure outer cylinder 233 will increase the internal air pressure of the pressure outer cylinder 233. Through the internal pressure transmission, the chin table 232 will be lifted to its original position by the pressure. Thus, a complete automatic adjustment of the cheek position is completed.

[0039] The L-arm mechanism 300 includes an L-arm skeleton 310, a first motor 320, a first photoelectric switch 330, a rotation drive mechanism 340 and a rotation mechanism 350; the L-arm skeleton 310 can be welded into one piece by processing aluminum alloy plates, or fixed together by mechanical connection. Through finite element analysis, holes are opened on the aluminum alloy plates under the premise of meeting the structural strength and rigidity, so as to reduce the weight of the whole machine, reduce the load of the lifting base 100, and facilitate installation and transportation; the rotation mechanism 350 is located at one end above the L-arm skeleton 310, and a rotation drive mechanism 340 is provided on one side of the rotation mechanism 350. The first motor 320 is located on one side of the rotation drive mechanism 340, and the first motor 320 drives the rotation mechanism 350 and the rotation drive mechanism 340; the first photoelectric switch 330 is fixed on the inner side of one end of the L-arm skeleton 310; the distance between the two first photoelectric switches 330 determines the distance that the rotation mechanism 350 moves along the Y direction, and this distance depends on the optimal dental arch size in the statistical law;

[0040] The rotary drive mechanism 340 includes a second motor 341, a first pulley 342, a second pulley 343 and a sliding base plate 344; a sliding base plate 344 is provided at the bottom of the rotary drive mechanism 340, a second motor 341 is fixed on the sliding base plate 344, a first pulley 342 is provided on the output shaft of the second motor 341, a second pulley 343 is provided on one side of the sliding base plate 344, a synchronous belt is connected between the first pulley 342 and the second pulley 343, and the first pulley 342 and the second pulley 343 are respectively meshed with the synchronous belt for transmission; the second motor is conducive to driving the first pulley to rotate synchronously, and the synchronous belt is conducive to driving the second pulley to rotate synchronously;

[0041] The rotating mechanism 350 includes a third pulley 351, a rotating block 352, a limit stopper 353, a photoelectric switch 354, a second photoelectric switch 355 and a rotating connecting tube 356; the third pulley 351 is rotationally fixed and passes through the sliding bottom plate 344, the third pulley 351 is connected to the second pulley 343 through a synchronous belt, the rotating block 352 is fixed above the third pulley 351 and rotates synchronously, the limit stopper 353 is located above the rotating block 352, the photoelectric switch 354 is provided on the limit stopper 353, the second photoelectric switch 355 is provided below the photoelectric switch 354, and the rotating connecting tube 356 is fixed below the third pulley 351 and rotates synchronously with the third pulley 351;

[0042] When the first motor 320 is working, it drives the rotary drive mechanism 340 and the rotary mechanism 350 to move linearly between the two first photoelectric switches 355. After the corresponding block blocks the photoelectric switch, the first photoelectric switch 355 transmits high and low level signals to the control center, and the control center performs the next action according to the signal. When the second motor 341 is working, the first pulley 342 rotates synchronously, drives the second pulley 343 to rotate through the synchronous belt, and then drives the third pulley 351 to rotate, so that the lower tube 430 and the first detector 460 rotate. When the third pulley 351 rotates a certain angle, the control center controls the motor to decelerate and reset according to the high and low level signals transmitted by the corresponding photoelectric switch 354 and the second photoelectric switch 355. If the control center fails in the control program, the machine can also be stopped by the rotating block 352 and the limit block 353 to prevent winding and further failures.

[0043] The rotating driven mechanism 400 includes a rotating bracket 410, a tube rotating driving mechanism 420, a radiation shielding mechanism 440 and a first detector 460; the rotating bracket 410 is fixed below the rotating connecting tube 356, and is used to connect the tube and the control box; the tube 430 and the control box 450 are fixed at both ends of the rotating bracket 410, and the tube rotating driving mechanism 420 is provided on the side of the rotating bracket 410 located on the tube 430, and is used to drive the tube 430 to rotate to a suitable angle; the first detector 460 is provided on one side of the control box 450, and the radiation shielding mechanism 440 is provided opposite to the first detector 460, and the radiation shielding mechanism 440 is located on the inner side of the tube 430;

[0044] The ball tube rotation driving mechanism 420 includes a third motor 421, a driven limit block 422, a first lead screw nut 423, a driving arm 424 and a ball tube rotating shaft 425; the third motor 421 is fixed to the rotating bracket 410, the other end of the third motor 421 is fixed with the first lead screw nut 423, the first lead screw nut 423 is connected with the driven limit block 422, and a driving arm 424 is provided on one side of the driven limit block 422; the other end of the driving arm 424 is provided with a ball tube rotating shaft 425, and the driving arm 424 is connected to the ball tube rotating shaft 425. The tube shaft 425 is rotationally connected; the third motor 421 is conducive to driving the first screw nut 423 to move linearly, thereby driving the driven limit block 422 to move synchronously, and the bottom of the driven limit block 422 is close to the surface of the rotating bracket 410, so the driven limit block 422 will not swing left and right, and the driving arm 424 moves synchronously with the driven limit block 422; since the driving arm 424 and the ball tube 430 shaft are rotationally connected, the ball tube 430 shaft is driven to rotate, thereby driving the ball tube 430 to rotate to a suitable angle.

[0045] The radiation shielding mechanism 440 includes a fourth motor 441, a second lead screw nut 442, a second slide rail 443, a mode selection shielding plate 444, a third photoelectric switch 445, a second laser positioning light 446 and a third laser positioning light 447; the fourth motor 441 is connected to the mode selection shielding plate 444 through the second lead screw nut 442, and the mode selection shielding plate 444 is located on the second slide rail 443; a third laser positioning light 447 is provided on one side of the mode selection shielding plate 444, and a second laser positioning light 446 is provided below the fourth motor 441. The fourth motor 441 is conducive to driving the second lead screw nut 442 to move, thereby driving the mode selection shielding plate 444 to move back and forth along the second slide rail 443. The mode selection shielding plate 443 has different opening sizes according to different modes, which is conducive to selecting a suitable exposure position according to different photography modes; the second laser positioning light 446 and the third laser positioning light 447 are the same as the first laser positioning light 234, and the two cooperate to put the patient's head in the most accurate position, thereby improving the quality of the photography image.

[0046] The lateral position detection mechanism 500 includes a lateral position rod 510, a lateral position mounting platform 520, a patient head posture adjustment mechanism 530 and a second detector 540; one end of the lateral position rod 510 is fixed to one side of the L-arm frame 310, and the other end of the lateral position rod 510 is fixed to the lateral position mounting platform 520, and the head posture adjustment mechanism 530 is arranged in the middle of the lateral position mounting platform 520; a second detector 540 is arranged below one side of the lateral position mounting platform 520. The second detector 540 is conducive to converting the X-rays emitted by the patient's skull bones through the tube 430 into images to present to the doctor.

[0047] The patient head posture adjustment mechanism 530 includes a front adjustment slider 531, a first light rod 532, a front dental tray 533, a side adjustment slider 534, a second light rod 535 and a side earplug 536; the front adjustment slider 531 is slidably connected to the first light rod 532, and the front dental tray 533 is connected below the front adjustment slider 531; a side adjustment slider 534 is provided on one side of the front adjustment slider 531, the side adjustment slider 534 is slidably connected to the second light rod 535, and the side earplug 536 is connected below the side adjustment slider 534. The front adjustment slider 531 and the first light rod 532 are slidably matched, which is conducive to freely adjusting the distance between the front dental tray 533 and the oral cavity, and the side adjustment slider 534 and the second light rod 535 are slidably matched, which is conducive to freely adjusting the distance between the side earplug 536 and the ear. In addition, there are adjustment structures on the front dental tray 533 and the side earplug 536 components, which is conducive to adjusting the corresponding components to a suitable height.

[0048] After the third pulley 351 rotates 400°, the first motor 320 and the second motor 341 decelerate and reset.

[0049] Working principle: When in use, after adjusting the height position of the jaw support mechanism 200 to a suitable level, let the patient place the chin on the chin platform 232, bite the tooth support 231 with the teeth, and the cheek alignment rod is automatically close to the face through the angle automatic adjustment mechanism 230. With the help of the patient's head weight, the chin platform 232 will be pressed down a certain distance by gravity, and the air pressure or hydraulic pressure inside the pressure outer cylinder 233 drives the telescopic rod 235 to move outward, driving the sliding block 236 to move outward synchronously. The outer edge of the sliding block 236 keeps in contact with the swing block 245, so that the swing block 245 drives the cheek alignment rod 241 to rotate, and the cheek alignment rods 241 on both sides are synchronously attached to the patient's face. Then, the first laser positioning light 234, the second laser positioning light 446 and the third laser positioning light 447 work together to ensure that the patient's head is in the best position. When the pressure inside the angle automatic adjustment mechanism 230 is rebalanced, the chin platform 232 keeps the same height.

[0050] When the CT mode is in progress, the first motor 320 remains in place, the rotating mechanism 350 works, and the second motor 341 works, driving the first pulley 342, the second pulley 343, and the third pulley 351 to rotate synchronously, thereby rotating the lower tube 430 and the first detector 460. During the rotation, the patient is located directly below the rotating mechanism 350, the tube 430 continuously emits X-rays, and the first detector 460 continuously receives signals, which are converted into dental CT images after processing by the control center and presented to the patient. When the third pulley rotates 400°, the control center controls the second motor 341 to decelerate and reset according to the high and low level signals transmitted by the corresponding photoelectric switch 354 and the second photoelectric switch 355. If the control program of the control center fails, the machine can also be stopped by the rotating block and the limit block to prevent winding and further failures.

[0051] When the panoramic PAN mode is in progress: due to the irregular dental arch curve, in order to obtain a true tooth image, the first motor 320 starts working, driving the rotating mechanism 350 and the rotating driven mechanism 400 to move in a straight line. At the same time, the rotating mechanism 350 works, and the second motor 341 works, driving the first pulley 342, the second pulley 343, and the third pulley 351 to rotate synchronously, so that the lower tube and detector and other components rotate. During the rotation process, the patient is located directly below the rotating mechanism 350, the tube 430 continuously emits X-rays, and the first detector 460 continuously receives signals, which are converted into tooth CT images after processing by the control center and presented to the doctor. When the third pulley rotates 400°, the control center controls the first motor 320 and the second motor 341 to decelerate and reset according to the high and low level signals transmitted by the corresponding photoelectric switch 354 and the second photoelectric switch 355. Due to the joint action of the first motor 320 and the second motor 341, the path taken by the center of the rotating mechanism basically overlaps with the patient's dental arch curve. In this way, the patient's periodontium is always in the detection center, improving the quality of the photographic image so that the dentist can make a more accurate diagnosis and treatment plan.

[0052] When the lateral CEPH mode is performed: the patient stands directly below the patient head posture adjustment mechanism 530, adjusts the distance and height of the front mouthpiece 533 and the side earplug 536, and then stands still. Then the second motor 341 is controlled to work, driving the entire rotating driven mechanism 400 to rotate 90° clockwise (looking from top to bottom) and then stop, and then the third motor 421 starts to work, driving the tube 430 to rotate 20° clockwise. Since the second detector 540 and the side angle of the L-arm skeleton 310 are 20°, the tube 430 and the second detector 540 are in a relative and parallel position at this time, and then the tube 430 starts to work to emit X-rays, and the second detector 540 converts the patient's skull bones into images and presents them to the doctor.

[0053] After the scan is completed, the patient's chin leaves the chin table 232. At this time, the reset spring sheet 244 pushes the swing block 245 back to its original position. The swing block 245 pushes the sliding block 236 to move linearly along the first slide rail 237 back to its original position. The telescopic rod 235 moves synchronously. The movement of the telescopic rod 235 into the pressure outer cylinder 233 will increase the internal air pressure of the pressure outer cylinder 233. Through the internal pressure transmission, the chin table 232 will be lifted to its original position by the pressure. Thus, a complete automatic adjustment of the cheek position is completed.

[0054] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

Claims

1. A multi-mode oral CBCT device, characterized in that: The invention comprises a lifting base (100), a jaw support mechanism (200), an L-arm mechanism (300), a rotation driven mechanism (400) and a lateral position detection mechanism (500); the lifting base (100) is fixed on the ground, the jaw support mechanism (200) is located on one side of the lifting base (100), the L-arm mechanism (300) is fixed on the top of the lifting base (100), the rotation driven mechanism (400) is rotationally connected to the bottom of the L-arm mechanism (300), and the lateral position detection mechanism (500) is fixed on the side end of the L-arm mechanism (300); The jaw support mechanism (200) comprises a connecting elbow (210), a jaw support mechanism shell (220), an automatic angle adjustment mechanism (230), and a cheek alignment mechanism (240); the connecting elbow (210) is fixed to one side of the lifting base (100), a jaw support mechanism shell (220) is provided above the connecting elbow (210), and the automatic angle adjustment mechanism (230) and the cheek alignment mechanism (240) are installed on both sides of the base of the jaw support mechanism shell (220); The automatic angle adjustment mechanism (230) includes a chin platform (232), a pressure outer cylinder (233), a telescopic rod (235) and a first slide rail (237); a tooth support (231) is fixed on the chin platform (232), and a pressure outer cylinder (233) is slidably matched below the chin platform (232), and the lower end of the pressure outer cylinder (233) passes through the jaw support mechanism shell (220) and is fixed on the base of the jaw support mechanism shell (220); a first laser positioning light (234) is fixed on one side of the lower end of the pressure outer cylinder (233); a telescopic rod (235) is provided below the first laser positioning light (234), one end of the telescopic rod (235) is slidably matched with the side hole of the pressure outer cylinder (233), and a sliding block (236) is fixed on the other end of the telescopic rod (235), and the sliding block (236) is located on the first slide rail (237); The cheek alignment mechanism (240) comprises a cheek alignment rod (241), a rotating platform (242), a limiting clip (243), a reset spring sheet (244) and a swing block (245); the cheek alignment rod (241) is symmetrically arranged outside the upper part of the jaw support mechanism housing (220); a horizontal axis is connected to the lower part of the cheek alignment rod (241); the horizontal axis passes through a plurality of rotating platforms (242); a swing block (245) is connected to the other end of the horizontal axis; the swing block (245) keeps contact with the outer edge of the sliding block (236); a plurality of rotating platforms (242) are fixed on the base of the jaw support mechanism housing (220); a limiting clip (243) is clamped on the horizontal axis; the limiting clip (243) is closely attached to the rotating platform (242); a reset spring sheet (244) is connected between the rotating platform (242) closer to the swing block (245) and the swing block (245).

2. A multi-mode oral CBCT device according to claim 1, characterized in that: The L-arm mechanism (300) comprises an L-arm frame (310), a first motor (320), a first photoelectric switch (330), a rotation drive mechanism (340) and a rotation mechanism (350); the rotation mechanism (350) is located at one end above the L-arm frame (310); a rotation drive mechanism (340) is provided on one side of the rotation mechanism (350); the first motor (320) is located on one side of the rotation drive mechanism (340); the first motor (320) drives the rotation mechanism (350) and the rotation drive mechanism (340); the first photoelectric switch (330) is fixed on the inner side of one end of the L-arm frame (310); The rotary drive mechanism (340) comprises a second motor (341), a first pulley (342), a second pulley (343) and a sliding base plate (344); a sliding base plate (344) is provided at the bottom of the rotary drive mechanism (340), a second motor (341) is fixed on the sliding base plate (344), a first pulley (342) is provided on the output shaft of the second motor (341), a second pulley (343) is provided on one side of the sliding base plate (344), a synchronous belt is connected between the first pulley (342) and the second pulley (343), and the first pulley (342) and the second pulley (343) are respectively meshed with the synchronous belt for transmission; The rotating mechanism (350) comprises a third pulley (351), a rotating block (352), a limit stopper (353), a corresponding photoelectric switch (354), a second photoelectric switch (355) and a rotating connecting tube (356); the third pulley (351) is rotationally fixed and passes through the sliding bottom plate (344); the third pulley (351) is connected to the second pulley (343) through a synchronous belt; the rotating block (352) is fixed above the third pulley (351) and rotates synchronously; the limit stopper (353) is located above the rotating block (352); a corresponding photoelectric switch (354) is provided on the limit stopper (353); a second photoelectric switch (355) is provided below the corresponding photoelectric switch (354); and the rotating connecting tube (356) is fixed below the third pulley (351) and rotates synchronously with the third pulley (351).

3. A multi-mode oral CBCT device according to claim 1, characterized in that: The rotating driven mechanism (400) comprises a rotating bracket (410), a tube rotating driving mechanism (420), a ray shielding mechanism (440) and a first detector (460); the rotating bracket (410) is fixed below the rotating connecting tube (356); the tube (430) and the control box (450) are fixed at both ends of the rotating bracket (410); the tube rotating driving mechanism (420) is provided on the side of the rotating bracket (410) located on the tube (430); the first detector (460) is provided on one side of the control box (450); the ray shielding mechanism (440) is provided opposite to the first detector (460); the ray shielding mechanism (440) is located on the inner side of the tube (430); The ball tube rotation driving mechanism (420) comprises a third motor (421), a driven limit block (422), a first lead screw nut (423), a driving arm (424) and a ball tube rotating shaft (425); the third motor (421) is fixed on the rotating bracket (410); the other end of the third motor (421) is fixed with the first lead screw nut (423); the first lead screw nut (423) is connected with the driven limit block (422); one side of the driven limit block (422) is provided with a driving arm (424); the other end of the driving arm (424) is provided with a ball tube rotating shaft (425); the driving arm (424) is rotatably connected with the ball tube rotating shaft (425); The ray shielding mechanism (440) comprises a fourth motor (441), a second lead screw nut (442), a second slide rail (443), a mode selection shielding plate (444), a third photoelectric switch (445), a second laser positioning light (446) and a third laser positioning light (447); the fourth motor (441) is connected to the mode selection shielding plate (444) via the second lead screw nut (442), and the mode selection shielding plate (444) is located on the second slide rail (443); a third laser positioning light (447) is provided on one side of the mode selection shielding plate (444), and a second laser positioning light (446) is provided below the fourth motor (441).

4. A multi-mode oral CBCT device according to claim 2, characterized in that: The lateral position detection mechanism (500) comprises a lateral position rod (510), a lateral position mounting platform (520), a patient head posture adjustment mechanism (530) and a second detector (540); one end of the lateral position rod (510) is fixed to one side of the L-arm frame (310), the other end of the lateral position rod (510) is fixed to the lateral position mounting platform (520), and the head posture adjustment mechanism (530) is arranged in the middle of the lateral position mounting platform (520); the second detector (540) is arranged below one side of the lateral position mounting platform (520); The patient head posture adjustment mechanism (530) comprises a front adjustment slider (531), a first light rod (532), a front dental tray (533), a side adjustment slider (534), a second light rod (535) and a side earplug (536); the front adjustment slider (531) is slidably connected to the first light rod (532), and the front dental tray (533) is connected below the front adjustment slider (531); a side adjustment slider (534) is provided on one side of the front adjustment slider (531), the side adjustment slider (534) is slidably connected to the second light rod (535), and the side earplug (536) is connected below the side adjustment slider (534).

5. The multi-mode oral CBCT device according to claim 2, characterized in that: After the third pulley (351) rotates 400°, the first motor (320) and the second motor (341) are decelerated and reset.

Images