CN216283251U

CN216283251U - Calibration device of intraoral three-dimensional scanner

Info

Publication number: CN216283251U
Application number: CN202121772179.4U
Authority: CN
Inventors: 魏晓晶; 魏金龙
Original assignee: Tianjin Wenran Technology Co ltd
Current assignee: Tianjin Wenran Technology Co ltd
Priority date: 2021-07-30
Filing date: 2021-07-30
Publication date: 2022-04-12
Anticipated expiration: 2031-07-30

Abstract

The application provides a calibration device of an intraoral three-dimensional scanner, and belongs to the technical field of three-dimensional scanning. The calibration device of the three-dimensional scanner and the intraoral three-dimensional scanner comprise a negative pressure mechanism and a positive pressure mechanism. The negative pressure mechanism comprises a calibration box, a vacuum pump, an exhaust pipe, a first electromagnetic valve, a first flowmeter, a calibration assembly and a calibration plate body, wherein the vacuum pump is connected to one side of the calibration box, and the air inlet end of the vacuum pump is communicated with the calibration box through the exhaust pipe. This application passes through the effect of vacuum pump, first solenoid valve, exhaust tube, demarcation case, closing plate, first extension board, guide rail, first flowmeter, air compressor, second solenoid valve, third solenoid valve and air duct to reach the high purpose of scanning precision, through pressure differential drive calibration board removal, the precision is than higher when the calibration board that makes removes, can reach the demand of scanning precision, the error that produces when reducing the calibration board and scanning, make three-dimensional scanner can normally work.

Description

Calibration device of intraoral three-dimensional scanner

Technical Field

The application relates to the field of three-dimensional scanning, in particular to a calibration device of an intraoral three-dimensional scanner.

Background

When the three-dimensional scanner is calibrated by original data, the conventional technical means is as follows: and enabling the three-dimensional scanner to acquire data of the calibration plate with a specific angle and a specific distance, and further fitting to obtain background reference parameters used by software operation when a subsequent scanned object is obtained. The three-dimensional scanner acquires data of a calibration plate with a specific angle and a specific distance, and the calibration plate/the three-dimensional scanner is adjusted mainly in a motor driving mode. The calibration device of the existing three-dimensional scanner is low in scanning precision, and when the position of the calibration plate is adjusted in a motor-driven mode, the calibration plate is rotationally driven by the screw rod to slide, but the precision of the mode is not high enough, so that the requirement of the scanning precision cannot be met, a large error can be generated during the scanning of the calibration plate, and the normal work of the three-dimensional scanner is influenced.

How to invent a calibration device of an intraoral three-dimensional scanner to improve the problems becomes a problem to be solved urgently by the technical personnel in the field.

SUMMERY OF THE UTILITY MODEL

In order to make up for the defects, the application provides a calibration device of an intraoral three-dimensional scanner, and aims to solve the problem that the scanning precision of the calibration device is low.

The embodiment of the application provides a calibration device of an intraoral three-dimensional scanner, which comprises a negative pressure mechanism and a positive pressure mechanism.

The negative pressure mechanism comprises a calibration box, a vacuum pump, an exhaust pipe, a first electromagnetic valve, a first flowmeter, a calibration component and a calibration plate body, wherein the vacuum pump is connected to one side of the calibration box, the air inlet end of the vacuum pump is communicated with the calibration box through the exhaust pipe, the first electromagnetic valve and the first flowmeter are arranged on the exhaust pipe, the calibration component is movably sealed on the inner wall of the calibration box, the calibration component penetrates and extends to the outside of the calibration box, the calibration plate body is arranged at one end of the calibration component, the positive pressure mechanism comprises an air storage box, an air compressor, an air outlet pipe, a second electromagnetic valve, an air guide pipe, a third electromagnetic valve, a second flowmeter and a filter component, the air storage box is connected to one side of the calibration box, the air storage box is communicated with the calibration box through the air guide pipe, and the third electromagnetic valve and the second flowmeter are arranged on the air guide pipe, the air compressor is installed in air compressor one side, the air compressor end of giving vent to anger pass through the outlet duct with the gas storage tank intercommunication, the second solenoid valve set up in on the outlet duct, filtering component connect in gas storage tank one side, the air compressor inlet end with filtering component intercommunication.

In the implementation process, the vacuum pump is used for extracting air in the calibration box through the exhaust pipe, so that the air on the left side of the calibration component is reduced, the pressure is reduced, the calibration component drives the calibration plate body to move leftwards, the first electromagnetic valve is used for controlling the communication state of the exhaust pipe, the first flowmeter is used for detecting the volume of the air passing through the exhaust pipe, so that people can accurately control the distance between the air compressor and the calibration plate body moving leftwards, the air compressor transports outside air into the air storage box through the air outlet pipe for compression and storage, the second electromagnetic valve is used for controlling the communication state of the air outlet pipe, the air guide pipe is used for transporting the air compressed in the air storage box into the calibration box, so that the air on the left side of the calibration box is increased, the pressure is increased, the calibration component drives the calibration plate body to move rightwards, the third electromagnetic valve is used for controlling the communication state of the air guide pipe, and the second flowmeter is used for detecting the volume of the air passing through, thereby make people can accurate control and calibration board body distance that moves to the right, filter assembly is used for filtering the air that enters into the gas storage box, gets rid of the dust in the air, makes in clean air enters into the gas storage box, can effectively reduce the instrument and take place the probability of blockking up.

In a specific embodiment, the calibration assembly comprises a sealing plate, a first support plate, a guide rail and a second support plate, the sealing plate is slidably connected to the inner wall of the calibration box, the first support plate and the second support plate are respectively mounted on two sides of the sealing plate, and the two guide rails are connected to one side of the guide rail.

In the implementation process, the pressure difference drives the first support plate to move left and right through the sealing plate, the first support plate drives the calibration plate body to move left and right through the guide rail, the second support plate and the first support plate are used for enabling the sealing plate to move left and right, deformation does not easily occur in the process, the service life and the sealing performance of the sealing plate are improved, and then the precision during scanning is improved.

In a specific embodiment, a first guide hole is formed at one end of the calibration box, and the two guide rails slidably penetrate through the first guide hole.

In a specific embodiment, one end of the calibration box is fixedly connected with a bracket, and the bracket is of a U-shaped structure.

In a specific embodiment, the inner surface of the bracket is provided with a second guide hole, and the two guide rails slidably penetrate through the second guide hole.

In the implementation process, the support and the second guide hole are used for enabling the calibration plate body to be not prone to sagging under the action of gravity, the calibration plate body is good in coaxiality, the three-dimensional space fitting error is small, and the accuracy of the measuring result is improved.

In a specific embodiment, the filter assembly comprises a filter box and a filter screen, the lower end of the filter box is of an open structure, the filter box is connected to the other end of the air storage box, and the filter screen is mounted on the inner wall of the filter box.

In the implementation process, the filter screen is used for filtering air, so that dust in the air is left below the filter screen, clean air enters the air storage box through the air compressor to be stored, and the occurrence of blockage of the device is reduced.

In a specific embodiment, an air inlet is formed on one side of the filter box, and the air inlet is positioned below the filter screen.

In a specific implementation scheme, the positive pressure mechanism further comprises a dust collecting component, the dust collecting component comprises a baffle, a bolt and a dust collecting box, a threaded groove is formed in the lower end of the filter box, the bolt is in threaded connection with the threaded groove, the dust collecting box is connected to one side of the baffle, and the baffle is movably plugged on the opening side of the lower end of the dust collecting box.

In the implementation process, the bolt enables the baffle to be fixed below the filter box through the thread groove, and the dust collecting box is used for storing dust falling off the filter screen.

In a specific embodiment, the inner surface of the baffle is provided with a through hole, and the bolt penetrates through the through hole in a sliding manner.

In a specific embodiment, a pressure sensor is fixedly connected to an inner wall of the calibration box, and the pressure sensor, the vacuum pump, the first electromagnetic valve, the first flowmeter, the air compressor, the second electromagnetic valve, the third electromagnetic valve and the second flowmeter are all electrically connected to an external controller.

In the implementation process, the pressure sensor is used for detecting the pressure in the calibration box.

Drawings

In order to more clearly explain the technical solutions of the embodiments of the present application, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and that for those skilled in the art, other related drawings can be obtained from these drawings without inventive effort.

Fig. 1 is a schematic structural diagram of a calibration device and an intraoral three-dimensional scanner of a three-dimensional scanner provided in an embodiment of the present application;

fig. 2 is a schematic structural diagram of a negative pressure mechanism provided in an embodiment of the present application;

FIG. 3 is a schematic structural diagram of a calibration assembly provided in an embodiment of the present application;

FIG. 4 is a schematic structural diagram of a positive pressure mechanism provided in an embodiment of the present application;

FIG. 5 is a schematic structural view of a filter assembly according to an embodiment of the present disclosure;

fig. 6 is a schematic structural diagram of a dust collecting assembly according to an embodiment of the present disclosure.

In the figure: 10-a negative pressure mechanism; 110-a calibration box; 120-a pressure sensor; 130-a vacuum pump; 140-an extraction tube; 150-a first solenoid valve; 160-first flow meter; 170-calibration component; 171-a sealing plate; 172-a first plate; 173-a guide rail; 174-a second plate; 180-calibration plate body; 190-a stent; 20-a positive pressure mechanism; 210-a gas storage tank; 220-an air compressor; 230-an air outlet pipe; 240-second solenoid valve; 250-an airway tube; 260-third electromagnetic valve; 270-a second flow meter; 280-a filter assembly; 281-a filter box; 282-a filter screen; 283-an air inlet; 284-thread groove; 290-a dust collection assembly; 291-baffle; 292-bolts; 293-dust collecting box.

Detailed Description

The technical solutions in the embodiments of the present application will be described below with reference to the drawings in the embodiments of the present application.

To make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments obtained by a person of ordinary skill in the art without any inventive work based on the embodiments in the present application are within the scope of protection of the present application.

Thus, the following detailed description of the embodiments of the present application, as presented in the figures, is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the application. All other embodiments obtained by a person of ordinary skill in the art without any inventive work based on the embodiments in the present application are within the scope of protection of the present application.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present application, it is to be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the present application and for simplicity in description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed in a particular orientation, and be operated in a particular manner, and thus should not be considered limiting.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.

In this application, unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can include, for example, fixed connections, removable connections, or integral parts; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.

In this application, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact of the first and second features, or may comprise contact of the first and second features not directly but through another feature in between. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

Referring to fig. 1, the present application provides a calibration apparatus for an intraoral three-dimensional scanner, which includes a negative pressure mechanism 10 and a positive pressure mechanism 20.

The positive pressure mechanism 20 is fixedly connected to the negative pressure mechanism 10, the negative pressure mechanism 10 is used for enabling the calibration plate to move leftwards, the positive pressure mechanism 20 is used for enabling the calibration plate to move rightwards, the precision is high when the calibration plate moves, and the accuracy of a three-dimensional code scanning result is improved.

Referring to fig. 1 and 2, the negative pressure mechanism 10 includes a calibration box 110, a vacuum pump 130, an exhaust pipe 140, a first electromagnetic valve 150, a first flowmeter 160, a calibration assembly 170 and a calibration plate body 180, the vacuum pump 130 is connected to one side of the calibration box 110, specifically, the vacuum pump 130 is fixedly connected to one side of the calibration box 110 by screws, an air inlet end of the vacuum pump 130 is communicated with the calibration box 110 by the exhaust pipe 140, the first electromagnetic valve 150 and the first flowmeter 160 are disposed on the exhaust pipe 140, the calibration assembly 170 is movably sealed to an inner wall of the calibration box 110, the calibration assembly 170 extends to the outside of the calibration box 110 in a penetrating manner, the calibration plate body 180 is mounted at one end of the calibration assembly 170, the vacuum pump 130 is used for extracting air in the calibration box 110 by the exhaust pipe 140, so that air at the left side of the calibration assembly 170 is reduced, pressure is reduced, the calibration assembly 170 drives the calibration plate body 180 to move leftward, the first electromagnetic valve 150 is used for controlling a communication state of the exhaust pipe 140, the first flow meter 160 serves to detect the volume of air passing through the suction pipe 140, thereby enabling one to precisely control and calibrate the distance the plate body 180 moves to the left.

Referring to fig. 2 and 3, the calibration assembly 170 includes a sealing plate 171, a first support plate 172, a guide rail 173 and a second support plate 174, the sealing plate 171 is slidably connected to an inner wall of the calibration box 110, the first support plate 172 and the second support plate 174 are respectively installed on two sides of the sealing plate 171, specifically, the first support plate 172 and the second support plate 174 are fixedly installed on two sides of the sealing plate 171 through glue joint, the two guide rails 173 are connected to one side of the guide rail 173, specifically, the two guide rails 173 are fixedly connected to one side of the guide rail 173 through welding, the sealing plate 171 drives the first support plate 172 to move left and right through a pressure difference, the first support plate 172 drives the calibration plate body 180 to move left and right through the guide rail 173, and the second support plate 174 and the first support plate 172 are used for making the sealing plate 171 not easily deform in the process of moving left and right, so as to improve the service life and the sealing performance of the sealing plate 171, and further improve the accuracy in scanning.

In some embodiments, a first guide hole is formed at one end of the calibration box 110, and the two guide rails 173 slidably penetrate through the first guide hole; one end of the calibration box 110 is fixedly connected with a bracket 190, and the bracket 190 is of a U-shaped structure; the second guide hole is formed in the inner surface of the support 190, the two guide rails 173 penetrate through the second guide hole in a sliding mode, and the support 190 and the second guide hole are used for enabling the calibration plate body 180 not to sag due to the action of gravity, so that the calibration plate body 180 is good in coaxiality, the three-dimensional space fitting error is small, and the accuracy of a measuring result is improved.

Referring to fig. 1, 2 and 4, the positive pressure mechanism 20 includes an air storage tank 210, an air compressor 220, an air outlet pipe 230, a second electromagnetic valve 240, an air duct 250, a third electromagnetic valve 260, a second flow meter 270 and a filter assembly 280, the air storage tank 210 is connected to one side of the calibration tank 110, specifically, the air storage tank 210 is fixedly connected to one side of the calibration tank 110 by welding, the air storage tank 210 is communicated with the calibration tank 110 through the air duct 250, the third electromagnetic valve 260 and the second flow meter 270 are disposed on the air duct 250, the air compressor 220 is mounted to one side of the air compressor 220, the air outlet end of the air compressor 220 is communicated with the air storage tank 210 through the air outlet pipe 230, the second electromagnetic valve 240 is disposed on the air outlet pipe 230, the filter assembly 280 is connected to one side of the air storage tank 210, the air inlet end of the air compressor 220 is communicated with the filter assembly 280, the air compressor 220 transports outside air into the air storage tank 210 through the air outlet pipe 230 for compression and storage, the second electromagnetic valve 240 is used for controlling the communication state of the air outlet pipe 230, the air guide pipe 250 is used for transporting the air compressed in the air storage tank 210 to the calibration tank 110, so that the air on the left side of the calibration tank 110 becomes more, the pressure becomes higher, the calibration assembly 170 drives the calibration plate body 180 to move rightwards, the third electromagnetic valve 260 is used for controlling the communication state of the air guide pipe 250, the second flow meter 270 is used for detecting the volume of the air passing through the air guide pipe 250, and therefore the distance of the people moving rightwards with the calibration plate body 180 can be accurately controlled, the filtering assembly 280 is used for filtering the air entering the air storage tank 210 and removing dust in the air, clean air enters the air storage tank 210, and the probability of blockage of instruments can be effectively reduced.

In some specific embodiments, a pressure sensor 120 is fixedly connected to an inner wall of the calibration box 110, the pressure sensor 120, the vacuum pump 130, the first solenoid valve 150, the first flow meter 160, the air compressor 220, the second solenoid valve 240, the third solenoid valve 260, and the second flow meter 270 are electrically connected to an external controller, and the pressure sensor 120 is configured to detect a pressure inside the calibration box 110.

Referring to fig. 4, 5 and 6, the filter assembly 280 includes a filter box 281 and a filter screen 282, the lower end of the filter box 281 is an open structure, the filter box 281 is connected to the other end of the air storage tank 210, specifically, the filter box 281 is fixedly connected to the other end of the filter box 281 by welding, the filter screen 282 is mounted on the inner wall of the filter box 281 by welding, specifically, the filter screen 282 is used for filtering air, so that dust in the air is left below the filter screen 282, clean air enters the air storage tank 210 through the air compressor 220 for storage, and the occurrence of blockage of the device is reduced; an air inlet 283 is formed on one side of the filter box 281, and the air inlet 283 is positioned below the filter screen 282.

In some specific embodiments, the positive pressure mechanism 20 further includes a dust collecting assembly 290, the dust collecting assembly 290 includes a baffle 291, a bolt 292, and a dust collecting box 293, the lower end of the filter box 281 is provided with a threaded groove 284, the bolt 292 is in threaded connection with the threaded groove 284, the dust collecting box 293 is connected to one side of the baffle 291, the baffle 291 is movably plugged at the lower end opening side of the dust collecting box 293, the bolt 292 enables the baffle 291 to be fixed below the filter box 281 through the threaded groove 284, and the dust collecting box 293 is used for storing dust falling from the filter screen 282; the inner surface of the baffle 291 is provided with a through hole, and the bolt 292 penetrates through the through hole in a sliding manner.

The working principle of the device is as follows: when the calibration plate body 180 needs to be moved to the left, the vacuum pump 130 and the first electromagnetic valve 150 are opened, the vacuum pump 130 can draw air in the space on the left side of the sealing plate 171 in the calibration box 110 through the air suction pipe 140, so that the air in the space on the left side is reduced, the pressure is reduced, the first support plate 172 drives the guide rail 173 to move to the left through the pressure difference, the guide rail 173 drives the calibration plate body 180 to move to the left, the first flow meter 160 can detect the volume of the air in the calibration box 110, the moving distance of the sealing plate 171 can be accurately controlled through the change of the air volume because the diameter of the calibration box 110 is not changed, when the calibration plate body 180 needs to move to the right, the air compressor 220 and the second electromagnetic valve 240 are opened, the air compressor 220 transports the air filtered by the external filter screen 282 into the air storage box 210, the air compressor 220 and the second electromagnetic valve 240 are closed, and the third electromagnetic valve 260 is opened, the air duct 250 can transport the compressed air in the air storage tank 210 to the calibration tank 110, so that the air in the left space becomes more, the pressure intensity becomes larger, the first support plate 172 drives the guide rail 173 to move rightwards through the pressure difference, the guide rail 173 drives the calibration plate body 180 to move rightwards, meanwhile, the second flow meter 270 can detect the volume of the air compressed into the calibration tank 110, as the diameter of the calibration tank 110 is unchanged, the moving distance of the sealing plate 171 can be accurately controlled through the change of the air volume, meanwhile, the support 190 can support and limit the guide rail 173, so that the calibration plate body 180 is not easy to sag due to gravity, the purpose of high scanning precision is achieved, the calibration plate is driven to move through the pressure difference, the precision is higher when the calibration plate is moved, the requirement on the scanning precision can be met, the error generated during the scanning of the calibration plate is reduced, and the three-dimensional scanner can normally work.

It should be noted that, the specific model and specification of the pressure sensor 120, the vacuum pump 130, the suction pipe 140, the first electromagnetic valve 150, the first flow meter 160, the sealing plate 171, the calibration plate body 180, the air storage tank 210, the air compressor 220, the air outlet pipe 230, the second electromagnetic valve 240, the air duct 250, the third electromagnetic valve 260, the second flow meter 270 and the filter screen 282 need to be determined according to the actual specification of the device, and the specific model selection calculation method adopts the prior art in the field, and therefore, detailed description is omitted.

The power supply of the pressure sensor 120, the vacuum pump 130, the first solenoid valve 150, the first flow meter 160, the air compressor 220, the second solenoid valve 240, the third solenoid valve 260, and the second flow meter 270, and the principle thereof will be apparent to those skilled in the art, and will not be described in detail herein.

The above description is only an example of the present application and is not intended to limit the scope of the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present application, and shall be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. A calibration device of an intraoral three-dimensional scanner is characterized by comprising

The negative pressure mechanism (10), the negative pressure mechanism (10) comprises a calibration box (110), a vacuum pump (130), an exhaust pipe (140), a first electromagnetic valve (150), a first flowmeter (160), a calibration component (170) and a calibration plate body (180), the vacuum pump (130) is connected to one side of the calibration box (110), the air inlet end of the vacuum pump (130) is communicated with the calibration box (110) through the exhaust pipe (140), the first electromagnetic valve (150) and the first flowmeter (160) are arranged on the exhaust pipe (140), the calibration component (170) is movably sealed on the inner wall of the calibration box (110), the calibration component (170) extends to the outside of the calibration box (110) in a penetrating manner, and the calibration plate body (180) is mounted at one end of the calibration component (170);

the positive pressure mechanism (20), the positive pressure mechanism (20) includes an air storage tank (210), an air compressor (220), an air outlet pipe (230), a second electromagnetic valve (240), an air duct (250), a third electromagnetic valve (260), a second flow meter (270) and a filtering component (280), the air storage tank (210) is connected to one side of the calibration tank (110), the air storage tank (210) is communicated with the calibration tank (110) through the air duct (250), the third electromagnetic valve (260) and the second flow meter (270) are arranged on the air duct (250), the air compressor (220) is arranged at one side of the air compressor (220), the air outlet end of the air compressor (220) is communicated with the air storage tank (210) through the air outlet pipe (230), the second electromagnetic valve (240) is arranged on the air outlet pipe (230), and the filtering component (280) is connected to one side of the air storage tank (210), the air compressor (220) inlet end is in communication with the filter assembly (280).

2. The calibrating device for the intraoral three-dimensional scanner according to claim 1, wherein the calibrating assembly (170) comprises a sealing plate (171), a first support plate (172), a guide rail (173) and a second support plate (174), the sealing plate (171) is slidably connected to the inner wall of the calibrating box (110), the first support plate (172) and the second support plate (174) are respectively installed on two sides of the sealing plate (171), and the two guide rails (173) are connected to one side of the guide rail (173).

3. The calibrating apparatus for the intraoral three-dimensional scanner according to claim 2, wherein one end of the calibrating box (110) is opened with a first guiding hole, and the two guide rails (173) slidably penetrate through the first guiding hole.

4. The calibrating device for the intraoral three-dimensional scanner according to claim 2, wherein a bracket (190) is fixedly connected to one end of the calibrating box (110), and the bracket (190) has a U-shaped structure.

5. The calibrating apparatus for the intraoral three-dimensional scanner according to claim 4, wherein the inner surface of the frame (190) has a second guiding hole, and the two guide rails (173) slidably penetrate through the second guiding hole.

6. The calibrating apparatus for the intraoral three-dimensional scanner according to claim 1, wherein the filtering assembly (280) comprises a filtering box (281) and a filtering screen (282), the lower end of the filtering box (281) is of an open structure, the filtering box (281) is connected to the other end of the air storage box (210), and the filtering screen (282) is installed on the inner wall of the filtering box (281).

7. The calibrating apparatus for the intraoral three-dimensional scanner according to claim 6, wherein an air inlet (283) is opened at one side of the filter box (281), and the air inlet (283) is located below the filter screen (282).

8. The calibrating device for the intraoral three-dimensional scanner according to claim 6, wherein the positive pressure mechanism (20) further comprises a dust collecting assembly (290), the dust collecting assembly (290) comprises a baffle (291), a bolt (292) and a dust collecting box (293), a threaded groove (284) is formed in the lower end of the filter box (281), the bolt (292) is in threaded connection with the threaded groove (284), the dust collecting box (293) is connected to one side of the baffle (291), and the baffle (291) is movably plugged on the opening side of the lower end of the dust collecting box (293).

9. The calibrating apparatus for the intraoral three-dimensional scanner according to claim 8, wherein the inner surface of the baffle (291) has a through hole, and the bolt (292) is slidably inserted through the through hole.

10. The calibration device of the intraoral three-dimensional scanner according to claim 1, wherein a pressure sensor (120) is fixedly connected to an inner wall of the calibration box (110), and the pressure sensor (120), the vacuum pump (130), the first solenoid valve (150), the first flow meter (160), the air compressor (220), the second solenoid valve (240), the third solenoid valve (260), and the second flow meter (270) are electrically connected to an external controller.