WO2023121121A1

WO2023121121A1 - Intraoral scanner calibration device and intraoral scanner system comprising same

Info

Publication number: WO2023121121A1
Application number: PCT/KR2022/020293
Authority: WO
Inventors: 사용재; 이상철
Original assignee: 주식회사 디디에스; 주식회사 레이
Priority date: 2021-12-24
Filing date: 2022-12-14
Publication date: 2023-06-29
Also published as: KR20230097526A

Abstract

An intraoral scanner calibration device and an intraoral scanner system are disclosed. The disclosed intraoral scanner calibration device comprises: a calibration unit fastened to a body of a 3D intraoral scanner which includes a reflective member and from which a probe tip is removed; a base, which is fastened to the calibration unit and has a bottom surface perpendicular to the fastened calibration unit; and a pattern plate disposed inside the calibration unit and used for calibration of the 3D intraoral scanner, and performs calibration while causing the body and an optical module disposed inside the body to linearly reciprocate in conjunction with the rotation of the calibration unit.

Description

Intraoral scanner calibration device and intraoral scanner system including the same

The present invention relates to a calibration device for an intraoral scanner, and more particularly, to an intraoral scanner calibration device that facilitates calibration work for a three-dimensional intraoral scanner and improves calibration accuracy, and an intraoral scanner system including the same.

A 3D intraoral scanner is a type of 3D scanner that acquires a plurality of optical images of a target object through a series of scanning sequences and generates 3D model data of the target object using these images. An intraoral scanner refers to a device configured to acquire a series of optical images of a body part, in particular, a structure inside the oral cavity, such as teeth and gums, among these 3D scanners.

The 3D intraoral scanner is placed in various environments that can cause errors in obtaining 3D model data during manufacturing or use. For example, replacing the probe tip of the intraoral scanner for hygienic purposes may cause errors.

Therefore, in order for the 3D intraoral scanner to obtain accurate 3D model data, an error correction operation for the intraoral scanner, that is, a calibration operation must be performed periodically. For this reason, the 3D intraoral scanner is provided with a calibration kit in the form of a separate accessory.

However, as in Patent Document 1 (Patent Publication No. 10-2129383 (2020.06.26)), the conventional calibration kit for intraoral scanners allows the user to hold the intraoral scanner with one hand, and then operate the calibration kit with the other hand for calibration There is a downside that usability is poor because you have to work.

In addition, since the user performs the calibration operation by holding the intraoral scanner and the calibration kit by hand, it is difficult to perform precise calibration due to the flow of the intraoral scanner or the calibration kit.

An object of the present invention is to provide an intraoral scanner calibration device with increased precision by moving an optical module while holding the pattern plate fixed during calibration of a 3D intraoral scanner and an intraoral scanner system including the same.

In addition, an object of the present invention is to provide an intraoral scanner calibration device that prevents movement of the pattern plate and body that may occur during calibration by performing a calibration operation by linearly reciprocating the main body in which the optical module is disposed while the pattern plate is fixed, and an oral scanner calibration device thereof It provides an intraoral scanner system that includes.

In addition, an object of the present invention is to fasten the optical module disposed in the body with the calibration unit in a direction perpendicular to the base of the intraoral scanner calibration device for calibration work, and the optical module disposed in the body in response to the rotation of the calibration unit in a straight line Provided is an intraoral scanner calibration device that improves the accuracy of calibration work by reciprocating and an intraoral scanner system including the same.

In addition, an object of the present invention is to convert the horizontal rotational force of the calibration control unit of the calibration unit into a vertical force during the calibration operation so that the user can linearly reciprocate the optical module from the pattern plate without holding the body case. Oral scanner calibration device And it provides an intraoral scanner system comprising the same.

In addition, an object of the present invention is to variously adjust the spiral groove movement pitch in response to the rotation angle of the calibration control unit that rotates when performing the calibration operation, so that the movement distance of the optical module in the main body can be adjusted in various ways according to the rotation. A scanner calibration device and an intraoral scanner system including the same are provided.

In addition, an object of the present invention is to arrange a block guide unit (BCU) to vertically linearly reciprocate the optical module of the main body in the intraoral scanner calibration device to respond to the horizontal rotation of the calibration control unit. It provides a calibration device and an intraoral scanner system including the same.

The intraoral scanner calibration device of the present invention for solving the prior art as described above includes a calibration unit fastened to the main body of the three-dimensional intraoral scanner from which the probe tip including the reflective member is removed; a base coupled to the calibration unit and having a lower surface perpendicular to the coupled calibration unit; And a pattern plate disposed inside the calibration unit and used for calibration of the 3D intraoral scanner, interlocking with the rotation of the calibration unit to rectilinearly reciprocate the body and the optical module disposed inside the body to perform calibration work It is characterized by performing.

In addition, the calibration unit of the intraoral scanner calibration device of the present invention includes a scanner holder fastened to the main body, a fixed frame fastened to the base and fixing a pattern plate used for calibration work at one end, and the scanner holder and the fixed frame and a calibration control unit that is disposed between the scanner holder and moves the scanner holder and the main body in a vertical linear reciprocating direction by interlocking with rotation in a horizontal direction.

In addition, the calibration unit of the intraoral scanner calibration device of the present invention includes a scanner fixing part fastened to the inside of the scanner holder, a first extension part extending from the scanner fixing part, and a second extension part extending from the first extension part It further includes an extension part and a frame extension part extending in the longitudinal direction of the fixed frame at the other end of the fixed frame.

In addition, a spiral groove is formed on the outer circumferential surface of the first extension of the intraoral scanner calibration device of the present invention, a moving groove parallel to the longitudinal direction of the second extension is formed on the outer circumferential surface of the second extension, and the frame extension It is characterized in that a plurality of stopper grooves are formed on the outer circumferential surface at regular intervals.

In addition, the fixed frame of the intraoral scanner calibration device of the present invention is fastened with an anti-rotation shaft fastened to the moving groove of the second extension part, and the calibration control unit is fastened with a fixed shaft fastened to the spiral groove of the first extension part and the A spring pin fastened to the stopper groove of the frame extension unit is fastened, and a movement pitch of the spiral groove of the first extension unit is set according to a rotation angle of the calibration control unit along an outer circumferential surface of the frame fixing unit, and fastened to the scanner holder. It is characterized in that the linear movement distance of the optical module of the main body is adjusted.

In addition, in the oral scanner calibration device of the present invention, the calibration unit further includes a block guide unit for moving the main body fastened to the scanner holder in the vertical direction, and the block guide unit, the second It includes a guide rail fastened to the extension part, and a cage fastened to the guide rail to perform up-and-down rectilinear reciprocating movement along the guide rail.

In addition, the block guide unit of the intraoral scanner calibration device of the present invention is fastened to the fixing frame, and is characterized in that the scanner holder and the scanner fixing part vertically and linearly reciprocate in association with the horizontal rotation of the calibration adjusting part.

In addition, the intraoral scanner system of the present invention includes a three-dimensional intraoral scanner composed of a probe tip including a reflective member and a body case including an optical module; and an intraoral scanner calibration device coupled to the body case of the 3D intraoral scanner to perform focus correction of the optical module, wherein the calibration device includes: a calibration unit coupled to the body case of the 3D intraoral scanner; and a base coupled to the calibration unit and having a bottom surface in a direction perpendicular to the coupled calibration unit, wherein the calibration unit includes a scanner holder coupled to the main body case, coupled to the base and calibrated at one end A fixing frame for fixing a pattern plate used for work, and a calibration control unit disposed between the scanner holder and the fixing frame and reciprocating the scanner holder and the body case in a vertical straight line in conjunction with rotation in a horizontal direction. .

In addition, the intraoral scanner calibration device of the present invention includes a calibration unit coupled to the handheld three-dimensional scanner; And a base coupled to the calibration unit to support the calibration unit, wherein the calibration unit includes a scanner holder detachable from the 3D scanner, and a 3D scanner coupled to the scanner holder. A fixing frame for fixing the pattern plate is rotatably coupled between the scanner holder and the fixing frame, moves the scanner holder in the scanning direction when rotating in a first direction, and moves the scanner holder in a second direction when rotating in a first direction. It includes a calibration control unit for moving to the opposite side of the scanning direction.

The intraoral scanner calibration device and intraoral scanner system including the same of the present invention have an effect of increasing precision by performing calibration work while moving the optical module while fixing the pattern plate during calibration work for the 3D intraoral scanner.

In addition, the intraoral scanner calibration device and intraoral scanner system including the same of the present invention perform the calibration work by rectilinearly reciprocating the main body on which the optical module is disposed while the pattern plate is fixed, so that the pattern plate and It has the effect of preventing body movement.

In addition, the intraoral scanner calibration device and intraoral scanner system including the same of the present invention fasten the calibration unit and the optical module disposed in the main body in a direction perpendicular to the base of the intraoral scanner calibration device for calibration work, and rotate the calibration unit Corresponding to this, there is an effect of improving the accuracy of the calibration work by linearly reciprocating the optical module disposed in the main body.

In addition, the intraoral scanner calibration device and intraoral scanner system including the same of the present invention converts the horizontal rotational force of the calibration control unit of the calibration unit into a vertical force during calibration, so that the user can remove the optical module from the pattern plate without holding the main body case. It has the effect of enabling linear reciprocating movement.

In addition, the intraoral scanner calibration device and intraoral scanner system including the same of the present invention, the optical module in the main body according to the rotation by variously adjusting the spiral groove movement pitch in response to the rotation angle of the calibration control unit that rotates when performing the calibration operation It has the effect of being able to adjust the moving distance of the variously.

In addition, the intraoral scanner calibration device and intraoral scanner system including the same of the present invention, the block guide unit (BCU) is placed in the intraoral scanner calibration device to linearly reciprocate the optical module of the body up and down to correspond to the horizontal rotation of the calibration control unit There is an effect of making the optical module reciprocate vertically and linearly.

1 is a diagram showing an intraoral scanner system in which an intraoral scanner calibration device and a 3-dimensional intraoral scanner are coupled according to an embodiment of the present invention.

Figure 2 is a perspective view showing a three-dimensional intraoral scanner according to an embodiment of the present invention.

3 is a view showing an optical module disposed in a body case of a 3D intraoral scanner according to an embodiment of the present invention.

FIG. 4 is a block diagram schematically showing the structure of the optical module of FIG. 3 .

5 is a perspective view showing an intraoral scanner calibration device according to an embodiment of the present invention.

6 is an exploded perspective view showing an intraoral scanner calibration device according to an embodiment of the present invention.

7 is a perspective view showing an assembly structure of an intraoral scanner calibration device and a body case according to an embodiment of the present invention.

8 and 9 are detailed assembly views of a scanner holder, a calibration control unit, and a fixing frame of an intraoral scanner calibration device according to an embodiment of the present invention.

10 is a perspective view showing a fixing frame and a pattern plate of the intraoral scanner calibration device according to an embodiment of the present invention.

11 is a diagram for explaining the operation of the intraoral scanner calibration device according to an embodiment of the present invention.

12 is a view showing how the intraoral scanner calibration device rectilinearly reciprocates when calibrating a three-dimensional intraoral scanner according to the prior art.

13 is a view showing a state in which a three-dimensional intraoral scanner coupled to the intraoral scanner calibration device of the present invention reciprocates in a straight line according to a calibration operation.

14 is a view showing how the scanner holder is fastened to the base of the intraoral scanner calibration device of the present invention.

15 is a view showing a state in which the calibration device is fastened after the scanner holder is separated from the base of the intraoral scanner calibration device of the present invention.

16 is a block diagram showing a three-dimensional intraoral scanner system according to another embodiment of the present invention.

17 is a diagram showing the structure of an intraoral scanner calibration device of a 3D intraoral scanner system according to another embodiment of the present invention.

18 is a diagram showing the structure of a body case of a 3D intraoral scanner system according to another embodiment of the present invention.

19 is a view showing an intraoral scanner system in which an intraoral scanner calibration device and a 3D intraoral scanner are coupled according to another embodiment of the present invention.

20 is an exploded perspective view of the intraoral scanner system of FIG. 19;

21 is a view showing the fastening state of the block guide unit and the fixing frame of the intraoral scanner system of the present invention.

22 to 25 are diagrams showing the structure and exploded perspective view of the block guide unit disposed in the intraoral scanner system of the present invention.

26 and 27 are views showing how the block guide unit of the intraoral scanner system of the present invention is fixed to the fixing frame.

Since the present invention can apply various transformations and have various embodiments, specific embodiments will be illustrated in the drawings and described in detail in the detailed description. Effects and features of the present invention, and methods for achieving them will become clear with reference to the embodiments described later in detail together with the drawings. However, the present invention is not limited to the embodiments disclosed below and may be implemented in various forms. In the following embodiments, terms such as first and second are used for the purpose of distinguishing one component from another component without limiting meaning. Also, expressions in the singular number include plural expressions unless the context clearly dictates otherwise. In addition, terms such as include or have mean that features or elements described in the specification exist, and do not preclude the possibility that one or more other features or elements may be added. In addition, in the drawings, the size of components may be exaggerated or reduced for convenience of explanation. For example, since the size and thickness of each component shown in the drawings are arbitrarily shown for convenience of description, the present invention is not necessarily limited to the illustrated bar.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings, and when describing with reference to the drawings, the same or corresponding components are assigned the same reference numerals, and overlapping descriptions thereof will be omitted. .

1 is a diagram showing an intraoral scanner system in which an intraoral scanner calibration device and a 3-dimensional intraoral scanner are coupled according to an embodiment of the present invention. Figure 2 is a perspective view showing a three-dimensional intraoral scanner according to an embodiment of the present invention. 3 is a view showing an optical module disposed in a body case of a 3D intraoral scanner according to an embodiment of the present invention. FIG. 4 is a block diagram schematically showing the structure of the optical module of FIG. 3 . 5 is a perspective view showing an intraoral scanner calibration device according to an embodiment of the present invention. 6 is an exploded perspective view showing an intraoral scanner calibration device according to an embodiment of the present invention.

1 to 6, the intraoral scanner system 100 of the present invention includes a three-dimensional intraoral scanner 150 and an intraoral scanner calibration device 500. The intraoral scanner calibration device 500 includes a calibration unit 200 for performing a calibration operation of the 3D intraoral scanner 150 and a base 300 for fixing the calibration unit 200.

First, the 3D intraoral scanner 150 according to an embodiment of the present invention includes a probe tip 114 and a body 160. The main body 160 has a structure in which a lower case 112 and an upper case 113 are assembled, and an optical module 170 is disposed therein. The optical module 170 acquires teeth, teeth, gums, etc. in the oral cavity as 2D images and converts them into 3D image model data.

The probe tip 114 has an optical path having a predetermined length to guide pattern light emitted into the oral cavity and pattern light incident from the oral cavity into the probe tip 114 . In addition, a reflective member capable of changing the traveling directions of incident light and outgoing light may be disposed in an arbitrary region of the optical path unit. Here, the patterned light (hereinafter referred to as 'incident light') incident into the body 160 through the scan hole of the probe tip 114 means an image of the inside of the oral cavity of the patient, and through the scan hole Pattern light emitted from the inside of the main body 160 (hereinafter, referred to as 'output light') means irradiation light emitted from the optical module 170 .

Accordingly, the patterned light emitted from the optical module 170 disposed inside the body 160 is emitted into the oral cavity after passing through the light path portion of the probe tip 114, the reflective member, and the scan hole. Conversely, the patterned light reflected in the oral cavity is incident to the optical module 170 area through the scan hole of the probe tip 114, the reflective member, and the optical path unit.

The optical module 170 may include a camera 172 , an image sensor 173 and a camera mounting unit 174 . In addition, the camera mounting unit 174 has a program capable of performing calibration work according to a predetermined program or a memory 175 capable of storing 2D and 3D images and a calibration work of the 3D intraoral scanner 150. A control unit 176 may be disposed.

The camera 172 is disposed in front of the optical module 170 of the main body 160 to receive incident light incident through the probe tip 114 . Here, 'light' refers to the visible light region that can be seen by the human eye, and refers to the inside of the oral cavity of a patient to be acquired (hereinafter, abbreviated as 'image').

Therefore, the 3D intraoral scanner 150 irradiates the outgoing light emitted from the optical module 170 of the body 160 to the inside of the oral cavity through the probe tip 114, and the light irradiated to the inside of the oral cavity is reflected back to the probe tip. It enters the optical module 170 in the form of incident light through 114. Incident light is converted from a 2D image to a 3D image model data form through the camera 172 and the image sensor 173 . As described above, the light reflected in the oral cavity and incident to the main body 160 is acquired in the form of a two-dimensional image, but through information such as the location of the camera 172 and the focal length of a target point photographed through the camera 172. The 2D image is converted into 3D image model data.

In addition, as the use of the 3D intraoral scanner 150 is accumulated, an error occurs in the focal length, and as a result, the accuracy, sharpness, and color of the 3D image model data are deteriorated. Therefore, the 3D intraoral scanner 150 needs to be calibrated periodically using the intraoral scanner calibration device 500 to correct the focal length.

5 and 6, the intraoral scanner calibration device 500 according to the embodiment of the present invention includes a calibration unit 200 and a base 300 for fixing and supporting the calibration unit 200.

The calibration unit 200 is disposed inside the scanner holder 201 to which the optical module 170 of the main body 160 of the 3D intraoral scanner 150 is fastened, and the scanner holder 201 to improve the optics of the main body 160 A scanner fixing part 203 directly fastened to the connection block 171 disposed in the module 170, a fixed frame 205 fastened to the scanner fixing part 203 and supporting the pattern plate 209, and a scanner holder 201 and a calibration control unit 211 disposed between the fixing frame 205 to reciprocate the scanner holder 201 vertically and linearly.

In more detail with reference to FIG. 6 , the scanner holder 201 of the calibration unit 200 has a structure in which the inside is open in both directions, and the inner circumferential surface surrounds and fixes the scanner fixing part 203 . That is, the scanner fixing part 203 is inserted into and fixed to the scanner holder 201 . In addition, the scanner fixing part 203 includes first and

second extension parts

203a and 203b having different diameters extending to one open area of the scanner holder 201 . The first extension part 203a extends from the scanner fixing part 203, and the second extension part 203b extends from the first extension part 203a. The diameter of the first extension part 203a may be equal to or larger than the diameter of the second extension part 203b, and conversely, the diameter of the second extension part 203b is greater than the diameter of the first extension part 203a. can be formed In addition, a spiral groove (SG) is formed on the outer circumferential surface of the first extension part (203a), and a moving groove (MG) is formed in a predetermined area on the outer circumferential surface of the second extension part (203b). The movable groove MG may include at least one or more grooves in a direction parallel to the longitudinal direction of the second extension part 203b.

In addition, a fastening groove (CG) is formed at one end of the scanner fixing part 203 so that the main body 160 can be fastened thereto. When the 3D oral scanner 150 is calibrated, the connection block 171 disposed in front of the optical module 170 of the main body 160 in a state in which the probe tip 114 is removed is the scanner fixing part 203 It is fastened to the fastening groove (CG) of.

In addition, the calibration adjusting unit 211 may have a ring structure with an open center so that the first and

second extension parts

203a and 203b may be inserted therein. As shown in the drawing, the calibration adjusting unit 211 may be assembled to surround the first and

second extension parts

203a and 203b. The inner diameter of the calibration control unit 211 may be larger than the diameters of the first and

second extension parts

203a and 203b.

In addition, the calibration control unit 211 is formed with a third hole H3 (not shown) into which the spring pin 212 can be inserted and a second hole H2 into which the fixed shaft 213 can be inserted. The spring pin 212 is engaged with the stopper groove PG formed in the frame extension 205a of the fixed frame 205 and the fixed shaft 213 is engaged with the spiral groove SG formed in the first extension 203a It can be. The functions of the spring pin 212 and the fixed shaft 213 are described in detail in the drawings below.

In addition, the fixing frame 205 has an open central area and fixes the pattern plate 209 to one end. In addition, a frame extension 205a extending in the longitudinal direction of the fixed frame 205 is disposed at the other end of the fixed frame 205 . The frame extension part 205a has a structure with an open center. When the calibration unit 200 is assembled, the frame extension part 205a is inserted into the central open area of the calibration adjusting part 211, and the second extension part 203b of the scanner fixing part 203 is the frame extension part ( 205a) is inserted into the central open area. Therefore, it is preferable that the diameter of the central open area of the frame extension part 205a is at least greater than the diameter of the second extension part 203b and smaller than the diameter of the central open area of the calibration control part 211 .

In addition, a plurality of stopper grooves PG are formed on an outer circumferential surface of the frame extension 205a of the fixed frame 205 in a direction parallel to the longitudinal direction of the frame extension 205a. A plurality of stopper grooves PG may be formed at regular intervals on the outer circumferential surface of the frame extension part 205a.

In the present invention, eight stopper grooves PG are formed at equal intervals on the outer circumferential surface of the frame extension portion 205a. That is, the stopper grooves PG are formed at an angle of 45º along the outer circumferential surface based on the center of the open area of the frame extension part 205a. However, since this is not a fixed design value, more or less than eight stopper grooves PG may be formed depending on the use environment or use conditions.

In addition, the pattern plate 209 fixed to the fixed frame 205 may have a circular structure by processing the circumference of the edge into a cylindrical shape, or may be formed in various shapes such as a rectangle, a rhombus, an ellipse, and a polygon. In addition, a direction marker may be disposed on the pattern plate 209 to check whether the phase changes according to rotation.

In addition, the pattern plate 209 may be disposed in a manner of assembling the central open area at one end of the fixing frame 205 . In addition, the pattern plate 209 may be arranged so that only the patterns formed on the pattern plate 209 are located in the central open area of the fixing frame 205 .

In addition, the pattern plate 209 is fixed by the fixed frame 205, but may be disposed in a horizontal direction with respect to the upper surface of the fixed frame 205 or disposed at various inclinations to have a predetermined angle with the upper surface of the fixed frame 205. As will be described later, the pattern plate 209 is disposed at one end of the fixing frame 205 with various inclinations, but the position is fixed and the pattern plate 209 does not move during calibration.

In addition, the fixed frame 205 has a first hole H1 into which the anti-rotation shaft 216 can be inserted, and the anti-rotation shaft 216 inserted into the first hole H1 is the scanner fixing part 203. ) is fastened with the moving groove MG formed in the second extension part 203b. The anti-rotation shaft 216 serves to offset rotational force in the horizontal direction so that the scanner fixing unit 203 is not rotated by the horizontal rotational force of the calibration control unit 211 .

Therefore, in the intraoral scanner calibration device 500 of the present invention, the scanner holder 201 and the scanner fixing unit 203 linearly reciprocate only in the vertical direction by the horizontal rotational force of the calibration control unit 211. That is, the intraoral scanner calibration device 500 of the present invention performs a calibration operation by moving the optical module 170 of the main body 160 up and down while the position of the pattern plate 209 is fixed.

Also, as shown in FIG. 6 , the calibration adjusting unit 211 is disposed between the scanner holder 201 and the fixing frame 205 . More specifically, the second extension part 203b of the scanner fixing part 203 disposed on the scanner holder 201 is assembled in such a way that it is inserted into the frame extension part 205a of the fixing frame 205 . Accordingly, the calibration control unit 211 is arranged to surround the fastening area of the second extension unit 203b and the frame extension unit 205a and guides the vertical linear movement of the scanner holder 201 . When the 3D oral scanner 150 is calibrated by the intraoral scanner calibration device 500, the calibration process for the calibration control unit 211 will be described in more detail in the drawings below.

In addition, the base 300 is formed in a disk-shaped structure with an internal cavity, and an open area OP is formed in a central region of one surface (upper surface). The fastening guide part 301 is formed along the circumference of the open area OP of the base 300 to have a predetermined height. The fastening guide part 301 allows the inserted fixing frame 205 to be positioned at a certain distance from the lower side of the base 300. Thus, the pattern plate 209 fixed by the fixing frame 205 is fixed to a specific position inside the base 300 .

That is, the pattern plate 209 is disposed at one end of the fixed frame 205, and even when the one end of the fixed frame 205 is inserted into the open area OP of the base 300, the height of the fastening guide part 301 As a result, the pattern plate 209 is located in the inner space of the base 300 .

As such, the intraoral scanner calibration device and intraoral scanner system including the same of the present invention have the effect of increasing precision by performing the calibration operation while moving the optical module while the pattern plate is fixed during the calibration operation for the 3D intraoral scanner there is.

7 is a perspective view showing an assembly structure of an intraoral scanner calibration device and a body case according to an embodiment of the present invention. 8 and 9 are detailed assembly views of a scanner holder, a calibration control unit, and a fixing frame of an intraoral scanner calibration device according to an embodiment of the present invention. 10 is a perspective view showing a fixing frame and a pattern plate of the intraoral scanner calibration device according to an embodiment of the present invention. 11 is a diagram for explaining the operation of the intraoral scanner calibration device according to an embodiment of the present invention.

7 to 11 together with FIGS. 5 and 6, the intraoral scanner system 100 of the present invention includes a three-dimensional intraoral scanner 150 and an intraoral scanner calibration device 500.

As described above, when performing the calibration work for the 3D intraoral scanner 150, after removing the probe tip 114, the connection block 171 of the main body 160 and the scanner holder 201 are placed in the scanner go Government 203 is entered into.

The intraoral scanner calibration device 500 includes a calibration unit 200 and a base 300, and the calibration unit 200 includes a scanner holder 201, a scanner fixing unit 203, a calibration control unit 211, and a fixed frame (205).

As shown in FIG. 7, one end of the fixed frame 205 of the calibration unit 200 is inserted into the open area OP of the base 300, and the frame extension 205a of the fixed frame 205 is It is disposed so as to protrude on the upper side of the base 300 perpendicular to the lower side of the base 300 .

In addition, the second extension part 203b of the scanner fixing part 203 is inserted into the calibration adjusting part 211 and the frame extension part 205a. In addition, the body 160 is fastened by inserting the connection block 171 of the optical module 170 disposed therein into the fastening groove CG formed in the scanner fixing part 203 of the scanner holder 201.

Unlike the prior art, the intraoral scanner calibration device 500 of the present invention does not move the pattern plate 209 during the calibration operation, and the optical module 170 of the main body 160 is moved vertically and linearly to perform the focus calibration operation do.

As described above, the oral scanner calibration device 500 of the present invention is the first to third holes (H1, H2, H3) in the fixed frame 205 and the calibration control unit 211 constituting the calibration unit 200 form In addition, the anti-rotation shaft 216 is inserted into the first hole H1 formed in the fixed frame 205, and the fixed shaft 216 is inserted into the second hole H2 and the third hole H3 formed in the calibration control unit 211, respectively. 213 and spring pin 212 are inserted.

In the intraoral scanner system 100 of the present invention, calibration work may be performed in a state in which the main body 160 of the 3D intraoral scanner 150 is positioned in a direction perpendicular to the lower surface of the base 300. In addition, the intraoral scanner system 100 of the present invention linearly reciprocates the optical module 170 of the body 160 of the three-dimensional intraoral scanner 150 in a state in which the pattern plate 209 is fixed by the fixing frame 205 Calibration is performed by moving.

In particular, the calibration unit 200 constituting the intraoral scanner calibration device 500 of the present invention uses the horizontal rotational force of the calibration control unit 211 to linearly reciprocate the main body 160 in the vertical direction. That is, the horizontal rotational force of the calibration control unit 211 is converted into a vertical force so that the scanner holder 201 can perform vertical (up and down) linear reciprocating motion.

Referring to the drawings, the principle of the optical module 170 of the main body 160 performing vertical linear reciprocating movement will be described in more detail as follows.

8 to 10, the oral scanner calibration device 500 of the present invention, the calibration unit 200 in the open area (OP) of the base 300 on the lower side (bottom surface) of the base 300 surface) to be fastened in a direction perpendicular to the The fixed frame 205 is formed in a cylindrical structure with an open center, a frame extension 205a extending in the longitudinal direction is disposed at one end, and a pattern plate 209 is fixedly disposed at the other end.

As described above, the scanner fixing part 203 fastened to the scanner holder 201 is inserted into one side of the calibration adjusting part 211 . More specifically, the first and

second extension parts

203a and 203b extending from the scanner fixing part 203 are inserted into one direction of the open area of the calibration adjusting part 211 and assembled. In the other direction of the open area of the calibration control unit 211, the frame extension 205a is inserted and assembled. The second extension part 203b of the scanner fixing part 203 is inserted into the open area of the frame extension part 205a.

At this time, the anti-rotation shaft 216 inserted into the first hole H1 of the fixing frame 205 is engaged with the movable groove MG formed in the second extension 203b. In addition, the fixed shaft 213 and the spring pin 212 respectively inserted into the second hole H2 and the third hole H3 of the calibration control unit 211 are spiral grooves of the first extension part 203a ( SG) and the stopper groove PG of the frame extension 205a.

Therefore, when the calibration controller 211 is horizontally rotated, the horizontal direction force of the horizontal rotational force is offset by the anti-rotation shaft 216 . In addition, the vertical direction force of the horizontal rotational force is transmitted to the spiral groove SG of the first extension part 203a by the fixing shaft 213 to apply the vertical direction force to the scanner holder 201 and the scanner fixing part 203. to provide.

That is, the horizontal rotational force of the calibration controller 211 is converted into a vertical force by the anti-rotation shaft 216 and the fixed shaft 213, so that the scanner fixing unit 203 and the scanner holder 201 are straight in the vertical direction. round trip

More specifically, since the horizontal rotational force of the calibration control unit 211 is transmitted to the spiral groove SG formed on the outer circumferential surface of the first extension portion 203a through the fixed shaft 213, the direction of movement of the spiral groove SG is determined. The scanner holder 201 and the scanner fixing part 203 move accordingly. Since the spiral groove (SG) is formed in a vertical direction while rotating the outer circumferential surface of the first extension part (203a), the scanner holder 201 and the scanner fixing part 203 receive rotational force in the horizontal direction and force in the vertical direction. .

In the embodiment of the present invention, the stopper grooves PG formed on the outer circumferential surface of the frame extension part 205a are formed every 45º, and the pitch of the spiral groove SG is 1 [mm] to move. However, since this is not fixed, as described above, stopper grooves PG can be formed at arbitrary angles (º) on the outer circumferential surface of the frame extension portion 205a, corresponding to the angle between the stopper grooves PG Thus, the movement pitch of the spiral groove (SG) can be adjusted in various ways. For example, when the frame extension 205a rotates 30º along the outer circumferential surface, the moving pitch of the spiral groove SG is varied such as 0.5 [mm], 1.0 [mm], 1.5 [mm], 2.0 [mm], and the like. can be designed and applied.

However, the anti-rotation shaft 216 inserted into the first hole H1 of the fixing frame 205 is engaged with the movable groove MG formed in the second extension 203b, so that the scanner holder 201 and the scanner fixing part The horizontal torque transmitted to 203 is removed. Accordingly, the scanner holder 201 and the scanner fixing unit 203 perform a vertical linear motion along the spiral groove SG by the horizontal rotational force transmitted from the calibration control unit 211 .

In addition, since the spring pin 212 inserted into the third hole H3 of the calibration control unit 211 is fastened to the eight stopper grooves PG formed in the frame extension 205a, when the calibration work is performed, the calibration The control unit 211 rotates horizontally at regular intervals. Since the vertical linear movement distance is determined according to the degree of horizontal rotation of the calibration controller 211 , the distance of the optical module 170 disposed on the main body 160 to the fixed pattern plate 209 can be adjusted step by step.

That is, since the focal length correction of the optical module 170 is performed within the focal length range in which the optical module 170 can shoot, the stopper groove PG calibrate step by step within the focal range of the optical module 170 can be performed. In this specification, since eight stopper grooves PG are disposed on the outer circumferential surface of the frame extension 205a, the focal range of the optical module 170 can be divided into eight to perform calibration.

In this way, the oral scanner calibration device 500 of the present invention, when the calibration control unit 211 rotates the outer circumferential surface of the frame extension unit 205a once (360º), the optical module 170 from the shortest focal length to the shortest Calibration can be performed for long focal lengths.

That is, in the intraoral scanner calibration device 500 of the present invention, when the calibration control unit 211 rotates the outer circumferential surface of the frame extension unit 205a once, the calibration operation is performed in all focus ranges that the optical module 170 can shoot It is done. However, as described above, since the movement pitches of the spiral groove SG can be variously adjusted according to the degree of rotation, the focus correction of the optical module 170 can be performed by rotating less than one rotation or rotating more than one rotation. .

As shown in FIG. 11, the intraoral scanner system 100 of the present invention is seated on the floor where the base 300 is placed, and the calibration unit in a direction perpendicular to the lower surface of the base 300 in contact with the floor ( 200) is concluded. Then, the main body 160 of the 3D intraoral scanner 150 is fastened to the scanner holder 201 of the calibration unit 200. As described above, since the main body 160 is fastened in a direction parallel to the longitudinal direction of the calibration unit 200, the optical module 170 of the main body 160 is positioned in a direction perpendicular to the lower surface of the base 300 do.

Therefore, the intraoral scanner system 100 of the present invention can perform calibration work in a state where the calibration unit 200 and the main body 160 are vertically disposed on the lower side of the base 300.

In the intraoral scanner calibration device 500 of the present invention, when only the calibration control unit 211 of the calibration unit 200 is horizontally rotated, the optical module 170 of the main body 160 moves up and down (vertically) in a straight line. Flow that may occur in the pattern plate 209 and the optical module 170 during operation can be minimized.

In addition, the intraoral scanner calibration device and intraoral scanner system including the same of the present invention perform the calibration work by rectilinearly reciprocating the main body on which the optical module is disposed while the pattern plate is fixed, so that the pattern plate and It has the effect of preventing body flow.

12 is a view showing how the intraoral scanner calibration device rectilinearly reciprocates when calibrating a three-dimensional intraoral scanner according to the prior art. 13 is a view showing a state in which a three-dimensional intraoral scanner coupled to the intraoral scanner calibration device of the present invention reciprocates in a straight line according to a calibration operation.

Referring to FIG. 12, the calibration cradle (C-C) according to the prior art has a cylindrical structure, and performs calibration by fastening the body (S-BODY) of the intraoral scanner to one end. More specifically, when performing calibration work for the intraoral scanner, the user holds the calibration cradle (C-C) with one hand and the main body (S-BODY) with the other hand while holding the main body (S-BODY) and the calibration cradle ( Assemble C-C).

Then, the user rotates the calibration cradle C-C while holding the main body S-BODY and moves the pattern plate disposed inside the calibration cradle C-C in the longitudinal direction of the calibration cradle C-C. That is, while moving the pattern plate of the calibration cradle (C-C), focus correction is performed on the optical module disposed inside the main body (S-BODY).

As such, since the calibration work according to the prior art is performed while the user is holding the main body (S-BODY) and the calibration cradle (C-C), the optical module of the calibration cradle (C-C) or the main body (S-BODY) Due to flow, it was difficult to secure the precision of calibration.

In particular, in the prior art, since the user has to operate a program for calibration while holding the calibration cradle (C-C) and the main body (S-BODY) with both hands, the workability of calibration is significantly reduced.

However, the intraoral scanner system of the present invention performs calibration while rotating only the calibration control unit 211 of the calibration unit 200 in a state where the calibration unit 200 is fastened to the base 300 stably positioned on a horizontal floor surface Since this is performed, the flow of the pattern plate 209 or the body case 160 does not occur, so that calibration accuracy can be increased.

As shown in FIG. 13, the intraoral scanner system of the present invention arranges the pattern plate 209 on the fixing frame 205 of the calibration unit 200, and the fixing frame 205 is fastened to the base 300 to fix do. Accordingly, the position of the pattern plate 209 is fixed in the inner space of the open area OP of the base 300 . That is, since the fixing frame 205 is inserted into the base 300 and fastened so that the position does not change, the position of the pattern plate 209 is also fixed.

In addition, as described above, in the calibration unit 200 of the present invention, when the calibration control unit 211 is horizontally rotated, the optical module 170 of the main body 106 performs a vertical linear reciprocating movement, so the optical module 170 Focus correction for can be performed in the same way as in the prior art.

In particular, the intraoral scanner calibration device 500 of the present invention rectilinearly reciprocates the optical module 170 of the main body 160 to be fastened in a vertical direction so that the distance of the optical module 170 from the pattern plate 209 is changed to perform calibration. That is, in the prior art, the calibration was performed while changing the distance of the pattern plate 209 from the optical module 170 by linearly moving the pattern plate 209, but in the present invention, the optical module 170 is linearly moved up and down to perform calibration Do the work.

14 is a view showing how the scanner holder is fastened to the base of the intraoral scanner calibration device of the present invention. 15 is a view showing a state in which the calibration device is fastened after the scanner holder is separated from the base of the intraoral scanner calibration device of the present invention.

14 and 15 are mounted using the cradle holder 700 when the 3D intraoral scanner of the present invention is not in use. As described above, the cradle holder 700 is fastened to the open area OP of the base 300, and the main body 160 of the 3D intraoral scanner is fastened to the cradle holder 700.

In addition, as shown in FIG. 15, when performing the calibration work for the 3D intraoral scanner, the cradle holder 700 is separated from the base 300, and then the calibration unit 200 is fastened to the base 300 . When the calibration unit 200 is coupled to the base 300, the main body 160 is coupled to the scanner holder 201 of the calibration unit 200, and then calibration is performed.

As shown in the drawing, the lower surface of the base 300 is seated on the floor surface and stably fixed with the floor surface. Then, the calibration unit 200 is fastened in a direction perpendicular to the lower surface of the base 300, and the body case 160 is fastened with the calibration unit 200 in the same direction as the longitudinal direction of the calibration unit 200. . Accordingly, the calibration unit 200 and the main body 160 are arranged to be continuous in the longitudinal direction, and are arranged in a direction perpendicular to the lower surface of the base 300 .

When the user performs calibration work on the 3D intraoral scanner, the focal length of the optical module 170 disposed on the main body 160 is corrected while horizontally rotating only the calibration control unit 211 of the calibration unit 200. Accordingly, deterioration in calibration accuracy due to movement of the calibration unit 200 or the optical module 170 of the main body 160 during calibration can be prevented.

16 is a block diagram showing a three-dimensional intraoral scanner system according to another embodiment of the present invention. 17 is a diagram showing the structure of an intraoral scanner calibration device of a 3D intraoral scanner system according to another embodiment of the present invention. 18 is a diagram showing the structure of a body case of a 3D intraoral scanner system according to another embodiment of the present invention.

16 to 18, the intraoral scanner system of the present invention includes a three-dimensional intraoral scanner 150 and an intraoral scanner calibration device 500. The intraoral scanner calibration device 500 includes a calibration unit 200 for performing a calibration operation of the 3D intraoral scanner 150 and a base 300 for fixing the calibration unit 200.

As described above, the body 160 includes an optical module 170, and the optical module 170, as shown in FIG. 4, includes a camera 172, an image sensor 173, and a camera mounting unit 174. includes In particular, the camera mounting unit 174 may include a memory 175, a control unit 176 for controlling a calibration operation of the 3D intraoral scanner 150, and a sensor unit SP. The sensor unit SP may be at least one position sensor or a contact sensor capable of detecting contact.

In addition, the memory 175 stores an image for calibration work, a program for calibration work, an algorithm for automatic calibration progress according to the fastening of the body case 160, the calibration unit 200, and the base 300 in the form of a program It can be.

In addition, the base 300 constituting the intraoral scanner calibration device 500 includes a servomotor (SB-M) for horizontally rotating the above-described calibration control unit 211, and a frame extension of the calibration control unit 211 ( 205a) includes a rotation detecting unit (R-DP) for detecting information on the distance (ie, the degree of rotation) of the outer peripheral surface moved, and a base controller (B-C).

More specifically, referring to FIGS. 17 and 18, the intraoral scanner system of the present invention includes first and second magnetic bodies M1 and M2 and first and second magnetic bodies M1 and M2 in the scanner holder 201 area of the calibration unit 200. Sensing units S1 and S2 may be included. The first and second magnetic materials M1 and M2 may be disposed along the circumference of the scanner fixing part 203 of the scanner holder 201 . Although the drawing shows that the first and second magnetic bodies M1 and M2 are disposed, a plurality of magnetic bodies may be disposed in a dot shape.

Also, the first and second sensing units S1 and S2 may be disposed along the circumference of the scanner fixing unit 203 and may be disposed between the first and second magnetic bodies M1 and M2.

In addition, third and fourth magnetic bodies M3 and M4 corresponding to the first and second magnetic bodies M1 and M2 may be further disposed between the optical module 170 of the main body 160 and the connection block 171. there is. The first and second magnetic bodies M1 and M2 and the third and fourth magnetic bodies M3 and M4 may have polarities capable of being magnetically coupled. Although referred to as third and fourth magnetic bodies M3 and M4 in the drawing, the third and fourth magnetic bodies M3 and M4 are metal materials that can be magnetically coupled to the first and second magnetic bodies M1 and M2. can be formed

Again, at least one light receiving sensor unit R may be disposed between the optical module 170 of the main body 160 and the connection block 171 . The light receiving sensor unit R receives the sensing signals generated from the first and second sensing units S1 and S2 and detects the optical module 170 of the main body 160 and the scanner holder 201 or the scanner fixing unit 203. The distance information of can be obtained. That is, information on whether the optical module 170 of the main body 160 and the scanner holder 201 or the scanner fixing unit 203 are fastened can be obtained by the light receiving sensor unit R.

Therefore, in the intraoral scanner system of the present invention, when the main body 160 and the intraoral scanner calibration device 500 are fastened, after obtaining fastening information from the sensor unit SP of the main body 160, the base through the control unit 176 (300) provides fastening information.

Based on the fastening information provided from the main body 160, the base controller B-C of the base 300 performs a calibration operation on the fastened main body 160. As described above, since the calibration operation is performed by the rotation of the calibration control unit 211 of the calibration unit 200, the base controller B-C operates the servo motor SB-M to adjust the calibration control unit 211. rotate

Since the calibration operation is performed by the calibration control unit 211 in units of separation distances (rotation angle units) of the stopper grooves PG formed in the frame extension part 205a, the rotation detection unit R-DP is the calibration control unit 211 ) is obtained periodically. That is, the calibration operation is performed until the calibration control unit 211 rotates the outer circumferential surface of the frame extension unit 205a once (in units of 8 stopper grooves).

When the calibration control unit 211 completes one rotation along the outer circumferential surface of the frame extension unit 205a, the calibration operation ends. However, since this is not fixed, when the rotational angle and the corresponding movement pitch of the spiral groove SG are set variously, the calibration work may be completed in a state of less than one rotation or more than one rotation.

19 is a view showing an intraoral scanner system in which an intraoral scanner calibration device and a 3D intraoral scanner are coupled according to another embodiment of the present invention. 20 is an exploded perspective view of the intraoral scanner system of FIG. 19; Hereinafter, parts that are distinguished from the configurations of the intraoral scanner system of FIGS. 1 to 6 will be mainly described. In the intraoral scanner system of the present invention, unlike FIGS. 1 to 6, the anti-rotation shaft 216 is not fastened to the movable groove (MG), and the block guide unit (BGU) is fastened so that the main body 160 is calibrated and adjusted. ) in a direction perpendicular to the direction of rotation.

19 and 20, the intraoral scanner system according to another embodiment of the present invention includes a 3D intraoral scanner and an intraoral scanner calibration device 1200. The intraoral scanner calibration device 1200 includes a calibration unit for performing a calibration operation on the main body 160 of the 3D intraoral scanner and a base 300 for fixing the calibration unit.

The calibration unit is disposed inside the scanner holder 601 to which the optical module 170 of the main body 160 of the three-dimensional intraoral scanner 150 is fastened, and the scanner holder 601, the optical module 170 of the main body 160 ) The scanner fixing part 603 fastened with the connection block 171 disposed on the , the fixing frame 605 fastened with the scanner fixing part 603 and supporting the pattern plate, the scanner holder 601 and the fixing frame ( 605) and includes a calibration control unit 211 for linearly reciprocating the scanner holder 601 up and down.

Referring to FIG. 20 , a scanner fixing part 603 including first and second extension parts 603a and 603 as shown in FIG. 6 is disposed in the scanner holder 601 of the calibration unit. Here, a guide groove GG for guiding the up and down linear motion of the block guide unit BGU is formed in the second extension part 603b.

In addition, the fixed frame 605 is formed with a block guide groove (BCG) open downward so that the block guide unit (BGU) can be assembled, and the block guide unit (BCU) is fastened to the block guide groove (BCG). do.

Therefore, unlike FIG. 6 , only the fixed shaft 213 and the spring pin 212 that can be coupled to the spiral groove SG formed on the outer circumferential surface of the first extension part 603a are coupled to the calibration control unit 211 .

21 is a view showing the fastening state of the block guide unit and the fixing frame of the intraoral scanner system of the present invention. 22 to 25 are diagrams showing the structure and exploded perspective view of the block guide unit disposed in the intraoral scanner system of the present invention. 26 and 27 are views showing how the block guide unit of the intraoral scanner system of the present invention is fixed to the fixing frame.

21 to 27, the block guide unit (BCU) disposed in the intraoral scanner system of the present invention is a guide rail 701 and a cage 702 engaged with the guide rail 701 to perform vertical linear motion. includes Although not shown in the drawing, a ball bearing is disposed inside the cage 702 so that it can move up and down along the guide rail 701 .

More specifically, in the guide rail 701 of the block guide unit (BCU), rail holes 704a are formed at predetermined intervals along the central longitudinal direction, and rail fixing means 704 are formed in the rail holes 704a. is concluded The rail fixing means 704 is fastened and fixed to holes formed in the guide groove CG formed on the outer circumferential surface of the aforementioned second extension portion 603b. In addition, rail grooves 710 are formed on both sides of the guide rail 701 along the longitudinal direction.

A slide groove 712 is formed on the rear surface of the cage 702 of the block guide unit (BCU), and a guide rail 701 is fastened to the slide groove 712. In addition, a cage cover 705 is fastened to the other side of the cage 702 on the surface where the slide groove 712 is formed.

The cage 702 is formed with a cage fixing hole 703a for fixing the cage 702 to the fixing frame 605 while fastening the cage cover 705 .

26 and 27, the block guide unit (BCU) is located in the cage fixing groove 606 formed on the outer circumferential surface of the fixing frame 605, and the cage 702 is fixed by the cage fixing means 703. It is fixed to the frame 606.

Accordingly, the cage 702 of the block guide unit BCU rises in the vertical direction by the rotation of the calibration control unit 211 . At this time, the guide rail 801 is fastened to the guide groove GG to prevent horizontal rotation of the scanner fixing unit 603 and to perform linear motion in the vertical direction.

Embodiments according to the present invention described above may be implemented in the form of program instructions that can be executed through various computer components and recorded on a computer-readable recording medium. The computer readable recording medium may include program instructions, data files, data structures, etc. alone or in combination. Program instructions recorded on the computer-readable recording medium may be specially designed and configured for the present invention, or may be known and usable to those skilled in the art of computer software. Examples of computer-readable recording media include magnetic media such as hard disks, floppy disks and magnetic tapes, optical recording media such as CD-ROMs and DVDs, and magneto-optical media such as floptical disks. medium), and hardware devices specially configured to store and execute program instructions, such as ROM, RAM, flash memory, and the like. Examples of program instructions include high-level language codes that can be executed by a computer using an interpreter or the like as well as machine language codes generated by a compiler. A hardware device may be modified with one or more software modules to perform processing according to the present invention and vice versa.

Specific implementations described in the present invention are examples and do not limit the scope of the present invention in any way. For brevity of the specification, description of conventional electronic components, control systems, software, and other functional aspects of the systems may be omitted. In addition, the connection of lines or connecting members between the components shown in the drawings are examples of functional connections and / or physical or circuit connections, which can be replaced in actual devices or additional various functional connections, physical connection, or circuit connections. In addition, if there is no specific reference such as “essential” or “important”, it may not be a component necessarily required for the application of the present invention.

In addition, the detailed description of the present invention described has been described with reference to preferred embodiments of the present invention, but those skilled in the art or those having ordinary knowledge in the art will find the spirit of the present invention described in the claims to be described later. And it will be understood that the present invention can be variously modified and changed without departing from the technical scope. Therefore, the technical scope of the present invention is not limited to the contents described in the detailed description of the specification, but should be defined by the claims.

Since the present invention is a device for performing calibration of a 3D scanner and an oral scanner system including a 3D scanner including the device, there is industrial applicability.

Claims

a calibration unit fastened to the main body of the 3D intraoral scanner from which the probe tip including the reflective member is removed;

a base coupled to the calibration unit and having a lower surface perpendicular to the coupled calibration unit; and

It includes a pattern plate disposed inside the calibration unit and used for calibration of the 3D intraoral scanner,

In conjunction with the rotation of the calibration unit, the main body and the optical module disposed inside the main body are linearly reciprocated to perform calibration work.

Intraoral scanner calibration device.
The method of claim 1, wherein the calibration unit,

A scanner holder fastened to the main body;

A fixing frame fastened to the base and fixing a pattern plate used for calibration at one end;

A calibration control unit disposed between the scanner holder and the fixed frame and interlocking with rotation in the horizontal direction to linearly reciprocate the scanner holder and the main body in a vertical direction,

Intraoral scanner calibration device.
According to claim 2,

The calibration unit,

A scanner fixing part fastened to the inside of the scanner holder;

a first extension portion extending from the scanner fixing portion;

a second extension portion extending from the first extension portion;

Further comprising a frame extension extending in the longitudinal direction of the fixed frame at the other end of the fixed frame,

Intraoral scanner calibration device.
According to claim 3,

A spiral groove is formed on the outer circumferential surface of the first extension portion, and a moving groove parallel to the longitudinal direction of the second extension portion is formed on the outer circumferential surface of the second extension portion.

Intraoral scanner calibration device.
According to claim 4,

A plurality of stopper grooves are formed at regular intervals on the outer circumferential surface of the frame extension,

Intraoral scanner calibration device.
According to claim 5,

The fixed frame has an anti-rotation shaft fastened to the movable groove of the second extension part, and the calibration control unit has a fixed shaft fastened to the spiral groove of the first extension part and a spring pin fastened to the stopper groove of the frame extension part. concluded

Intraoral scanner calibration device.
According to claim 6,

The calibration control unit sets the movement pitch of the spiral groove of the first extension in correspondence with the rotation angle along the outer circumferential surface of the frame fixing unit, and adjusts the linear movement distance of the optical module of the main body fastened to the scanner holder.

Intraoral scanner calibration device.
According to claim 2,

The calibration unit further comprises a block guide unit for vertically moving the main body fastened to the scanner holder.

Intraoral scanner calibration device.
According to claim 8,

The block guide unit,

a guide rail engaged with the second extension of the scanner fixing unit;

Including a cage fastened to the guide rail to perform vertical linear reciprocating movement along the guide rail,

Intraoral scanner calibration device.
According to claim 9,

The block guide unit is fastened to the fixed frame and moves the scanner holder and the scanner fixing part vertically and linearly reciprocating in conjunction with the horizontal rotation of the calibration control part.

Intraoral scanner calibration device.
A three-dimensional intraoral scanner composed of a body case including a probe tip including a reflective member and an optical module; and

Including an intraoral scanner calibration device that is engaged with the main body case of the three-dimensional intraoral scanner to perform focus correction of the optical module,

The calibration device,

a calibration unit fastened to the body case of the 3D intraoral scanner; and

A base coupled to the calibration unit and having a bottom surface in a direction perpendicular to the coupled calibration unit,

The calibration unit is disposed between a scanner holder fastened to the main body case, a fixed frame fastened to the base and fixing a pattern plate used for calibration at one end, and between the scanner holder and the fixed frame, in a horizontal direction Including a calibration control unit for linearly reciprocating the scanner holder and the main body case in a vertical direction in conjunction with rotation,

intraoral scanner system.
According to claim 11,

The calibration unit,

A scanner fixing part fastened to the inside of the scanner holder;

a first extension portion extending from the scanner fixing portion;

a second extension portion extending from the first extension portion;

Further comprising a frame extension extending in the longitudinal direction of the fixed frame at the other end of the fixed frame,

intraoral scanner system.
According to claim 12,

A spiral groove is formed on the outer circumferential surface of the first extension portion, and a moving groove parallel to the longitudinal direction of the second extension portion is formed on the outer circumferential surface of the second extension portion.

intraoral scanner system.
According to claim 13,

A plurality of stopper grooves are formed at regular intervals on the outer circumferential surface of the frame extension,

intraoral scanner system.
According to claim 14,

The fixed frame has an anti-rotation shaft fastened to the moving groove of the second extension part, and the calibration control unit has a fixed shaft fastened to the spiral groove of the first extension part and a spring pin fastened to the stopper groove of the frame extension part. concluded,

intraoral scanner system.
Calibration unit coupled with the handheld 3D scanner; and

And a base fastened to the calibration unit to support the calibration unit,

The calibration unit,

A scanner holder detachable from the three-dimensional scanner;

A fixing frame for fixing a pattern plate disposed on a scanning direction side of a 3D scanner coupled to the scanner holder;

Calibration that is rotatably coupled between the scanner holder and the fixing frame, moves the scanner holder in the scanning direction when rotating in a first direction, and moves the scanner holder in a side opposite to the scanning direction when rotating in a second direction including control

Intraoral scanner calibration device.