Calibration device for oral cavity scanner

Abstract

The utility model relates to the field of oral cavity scanning, and provides a calibration device for an oral cavity scanner, the calibration device comprises a first seat body, a second seat body and a calibration module, the calibration module comprises a calibration assembly, and the calibration assembly comprises a calibration plate and a backlight plate; the first seat body is fixed to the second seat body, and an inner cavity is defined by the first seat body and the second seat body; the calibration module is arranged in the internal cavity and is fixed on the second seat body; the first seat body is provided with a scanning window, the scanning window is used for an oral cavity scanner to scan the calibration assembly, and a calibration pattern on a calibration plate in the calibration assembly faces the scanning window; the backlight plate is arranged on the side, away from the scanning window, of the calibration plate and used for emitting backlight to the calibration plate. Backlight is provided for the calibration plate through the backlight plate in the inner cavity defined by the first seat body and the second seat body, clear and accurate images can be shot by the oral cavity scanner, and interference of ambient light on the calibration process is avoided.

Description

Technical Field

[0001] The utility model relates to the field of oral scanning, in particular to a calibration device for an oral scanner. Background Art

[0002] As we all know, the volume of an object changes with temperature. When the volume of an optical component changes, its optical performance will also change.

[0003] Therefore, when the optical performance of the internal optical components in the oral scanner product changes, it will affect the scanning accuracy, causing the user's scanned data to deviate significantly from the actual value, and the oral scanner needs to be recalibrated.

[0004] In oral scanner products, the conventional calibration method is to make a special calibration plate, use it to capture images at different distances, and process and calculate the captured images to obtain a set of benchmark parameters. However, when capturing images, the calibration accuracy will be affected by the ambient light. If the ambient light is poor or too strong, the calibration effect will be reduced. Utility Model Content

[0005] In view of the shortcomings of the prior art, the purpose of the present invention is to provide a calibration device for an oral scanner that can improve the calibration effect.

[0006] In order to solve the above problems, the present invention provides the following technical solutions:

[0007] In a first aspect, an embodiment of the present application provides a calibration device for an oral scanner, the calibration device comprising: a first base, a second base, and a calibration module, the calibration module comprising a calibration assembly, the calibration assembly comprising a calibration plate and a backlight plate;

[0008] The first base body is fixed to the second base body, and the first base body and the second base body form an internal cavity;

[0009] The calibration module is disposed in the internal cavity and fixed to the second base;

[0010] The first base is provided with a scanning window, the scanning window being used for the oral scanner to scan the calibration component, and the calibration pattern on the calibration plate in the calibration component faces the scanning window;

[0011] The backlight plate is arranged on a side of the calibration plate away from the scanning window, and is used for emitting backlight to the calibration plate.

[0012] In some embodiments, the calibration plate is a transparent or translucent structure.

[0013] In some embodiments, a light doubling plate is provided between the backlight plate and the calibration plate, and the light doubling plate is used to uniformly illuminate the backlight emitted by the backlight plate onto the calibration pattern on the calibration plate.

[0014] In some embodiments, the light diffuser is a transparent or translucent structure.

[0015] In some embodiments, the calibration device further includes a calibration mounting member;

[0016] The calibration component is fixed on a first mounting surface of the calibration mounting member, and the first mounting surface is not parallel to a plane where the scanning window is located.

[0017] In some embodiments, the calibration device further includes a conductive slip ring and a power cord;

[0018] The calibration installation piece has a hollow structure, and the conductive slip ring is plugged into the hollow structure of the calibration installation piece;

[0019] The power line passes through the conductive slip ring, and one end of the power line is connected to the backlight panel. The power line supplies power to a light source that emits backlight on the backlight panel.

[0020] In some embodiments, the calibration device includes: a drive assembly, a first transmission assembly, and a second transmission assembly;

[0021] The driving assembly is used to drive the first transmission assembly to rotate and move relative to the scanning window;

[0022] The calibration component is connected to the first transmission component, and the calibration component moves relative to the scanning window following the first transmission component;

[0023] The second transmission assembly is connected to the first transmission assembly and the calibration assembly, and the second transmission assembly is used to make the calibration assembly rotate following the first transmission assembly.

[0024] In some embodiments, the calibration device further comprises a swing assembly;

[0025] The swing assembly is connected to the calibration assembly and the second transmission assembly;

[0026] The second transmission assembly is also used to drive the swing assembly to rotate;

[0027] When the swing component rotates, the calibration component is driven to reciprocate.

[0028] In some embodiments, the second transmission assembly includes a first transmission wheel, a second transmission wheel, and a transmission belt, wherein the transmission belt is sleeved on the first transmission wheel and the second transmission wheel;

[0029] The first transmission wheel is connected to the first transmission assembly;

[0030] The second transmission wheel is connected to the calibration component.

[0031] In some embodiments, the first transmission assembly is a screw rod, and the calibration device further includes a nut that cooperates with the screw rod;

[0032] The driving assembly is used to drive the lead screw to rotate, and the nut is used to make the lead screw move relative to the scanning window when the lead screw rotates.

[0033] The beneficial effect of the present invention is that the backlight plate provides backlight for the calibration plate in the internal cavity surrounded by the first base and the second base, so that the oral scanner can capture clear and accurate images and avoid interference of ambient light on the calibration process. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 This is a first stereoscopic view of a calibration device for an oral scanner provided in an embodiment of the present application.

[0035] Figure 2 This is a top view of a calibration device for an oral scanner provided in an embodiment of the present application.

[0036] Figure 3 This is an exploded view of a calibration device for an oral scanner provided in an embodiment of the present application.

[0037] Figure 4 This is a second stereoscopic view of the calibration device for an oral scanner provided in an embodiment of the present application.

[0038] Figure 5 This is a third stereoscopic view of the calibration device for an oral scanner provided in an embodiment of the present application.

[0039] Figure 6 It is an exploded diagram of the calibration module provided in an embodiment of the present application.

[0040] Figure 7 This is a first cross-sectional view of the calibration module provided in an embodiment of the present application.

[0041] Figure 8 This is a second cross-sectional view of the calibration module provided in an embodiment of the present application.

[0042] Figure 9 It is an exploded view of the calibration component provided in an embodiment of the present application. DETAILED DESCRIPTION

[0043] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0044] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include one or more of such features. In the description of this utility model, "plurality" means two or more, unless otherwise specifically defined.

[0045] See also Figures 1 to 3 , Figure 1 is a first stereoscopic view of a calibration device for an oral scanner provided in an embodiment of the present application, Figure 2 is a top view of a calibration device for an oral scanner provided in an embodiment of the present application, Figure 3 This is an exploded view of a calibration device for an oral scanner provided in an embodiment of the present application.

[0046] See also Figure 1 and Figure 2 , Figure 1 and Figure 2 The calibration device 1 for an oral scanner includes a first base 100 and a second base 300 . A scanning window 101 is formed on the first base 100 .

[0047] In some embodiments, an oral scanner socket 102 is further provided on the scanning window 101 , and the oral scanner socket 102 is used to insert an oral scanner.

[0048] In some embodiments, a circuit board 301 can be set on the second base body 300. The circuit board 301 can communicate with the electronic device and control the driving component 210 according to the instructions issued by the electronic device. Setting the circuit board in the second base body 300 can save space in the calibration module 200.

[0049] In some embodiments, for ease of explanation, the calibration device 1 for an oral scanner in the present application places the second base 300 horizontally on the placement surface when in use, defines the direction perpendicular to the placement surface and pointing from the second base 300 to the first base 100 as the height direction and the vertical direction, and defines the direction in the plane parallel to the placement surface as the horizontal direction.

[0050] See also Figure 3 ,like Figure 3As shown, the calibration device 1 for the oral scanner further includes a calibration module 200 , in which a calibration component 240 is provided. The oral scanner can scan the calibration component 240 provided in the calibration module 200 for calibration.

[0051] In order to facilitate understanding of the solution of this application, the following Figures 4 to 9 These are schematic diagrams after the first base body 100 and the second base body 200 are hidden.

[0052] See also Figure 4 and Figure 5 , Figure 4 is a second stereoscopic view of a calibration device for an oral scanner provided in an embodiment of the present application, Figure 5 This is a third stereoscopic view of the calibration device for an oral scanner provided in an embodiment of the present application.

[0053] like Figure 4 and Figure 5 As shown, the calibration module 200 in the calibration device 1 includes: a driving component 210 , a first transmission component 220 , a second transmission component 230 , a calibration component 240 and a scanning window 101 .

[0054] In some embodiments, the scanning window 101 is used for the oral scanner to scan the calibration component 240 .

[0055] In some embodiments, the driving assembly 210 is used to drive the first transmission assembly 220 to rotate and move relative to the scanning window 101 .

[0056] In some embodiments, the calibration component 240 is connected to the first transmission component 220 , and the calibration component 240 moves relative to the scanning window 101 following the first transmission component 220 .

[0057] In some embodiments, the second transmission assembly 230 is connected to the first transmission assembly 220 and the calibration assembly 240 , and the second transmission assembly 230 is configured to enable the calibration assembly 240 to rotate following the first transmission assembly 220 .

[0058] Optionally, the driving component 210 is a motor, such as a stepper motor, a servo motor, etc., which is not limited in this application.

[0059] Please refer to Figure 6 , Figure 6 It is an exploded diagram of the calibration module provided in an embodiment of the present application.

[0060] like Figures 4 to 6As shown, in some embodiments, the calibration device 1 also includes a swinging assembly 282, which is connected to the calibration assembly 240 and the second transmission assembly 230. The second transmission assembly 230 is also used to drive the swinging assembly 282 to rotate, and the swinging assembly 282 drives the driving assembly 240 to reciprocate when rotating.

[0061] In some embodiments, the swing assembly 282 is an eccentric.

[0062] In some embodiments, the swing assembly 282 is a cam plate.

[0063] Alternatively, as Figure 6 As shown, the swing assembly 282 is Figure 6 The cam plate shown in the figure has four protrusions, namely protrusion A, protrusion B, protrusion C and protrusion D (not shown in the figure) blocked by the limiting assembly 290. Figure 6 The middle cam disc takes any raised portion as a starting point, and the calibration component 240 completes a reciprocating motion every time it rotates 90°.

[0064] Optionally, the present application does not limit the number of protrusions on the cam plate, and the number of protrusions is only used to determine the angle completed by one reciprocating swing.

[0065] See also Figure 7 , Figure 7 This is a first cross-sectional view of the calibration module provided in an embodiment of the present application.

[0066] like Figures 4 to 7 As shown, in some embodiments, the calibration module 200 in the calibration device 1 further includes a base 250 , a first plate 270 and a second plate 260 , the base 250 is provided with a first side wall 252 , and the first side wall 252 is provided with a swing shaft 284 .

[0067] In some embodiments, the first plate 270 is provided with an opening 273 adapted to the swing shaft 284 , and the first plate 270 is passed through the swing shaft 284 through the opening 273 .

[0068] In some embodiments, the first plate 270 is connected to the second plate 260 .

[0069] Optionally, the first plate 270 is slidably connected to the second plate 260 via at least one connecting column 286 , and the first plate 270 can move closer to or away from the second plate 260 by sliding.

[0070] In some embodiments, the second plate 260 is connected to the swing assembly 282 and the calibration assembly 240 , and when the swing assembly 282 rotates, the second plate 260 and the driving assembly 240 move back and forth around the swing shaft 284 .

[0071] In some embodiments, if the driving component 210 can follow the first transmission component 220 to move relative to the scanning window 101, the second plate 260 can be fixedly connected to the driving component 210, and the calibration component 240 can be driven to move relative to the scanning window 101 through the second plate 260.

[0072] For example, Figures 4 to 7 As shown, the second plate 260 is fixedly connected to the driving assembly 210, and the second plate 260, the calibration assembly 240, the driving assembly 210, the swing assembly 282 and the second transmission assembly 230 are all fixed to the first transmission assembly 220. The second plate 260, the calibration assembly 240, the driving assembly 210, the swing assembly 282 and the second transmission assembly 230 move up and down together with the first transmission assembly 220 relative to the scanning window 101.

[0073] Optionally, the second plate 260, the calibration assembly 240, the driving assembly 210, the swing assembly 282 and the second transmission assembly 230 are all fixed to the bottom of the first transmission assembly 220, so that the center of gravity of the calibration device 1 is lower and more stable to use.

[0074] Optionally, the connecting post 286 of the second plate 260 passes through the post hole on the first plate 270 , and the connecting post 286 is slidably connected to the post hole on the first plate 270 along the upward and downward sliding directions.

[0075] Optionally, the calibration device 1 is further provided with at least one elastic column 287, at least one spring is provided in the elastic column 287, and a spring hook is respectively provided at both ends of the elastic column 287, which respectively hook the extension on the first plate 270 and the extension on the second plate 260 or the screw head of the screw, etc. Because the first transmission component 220 is only located on one side of the second plate 260, if only the first transmission component 220 is used to provide support force for the second plate 260, the second plate 260 may be tilted, affecting the calibration effect. The elastic column 287 can keep the plane of the second plate 260 level.

[0076] Furthermore, the connecting column 286 of the second plate 260 is also used to limit the horizontal displacement of the second plate 260 and the first plate 270 .

[0077] Specifically, when the first transmission assembly 220 moves upward relative to the scanning window 101 , the first transmission assembly 220 approaches the scanning window 101 ; when the first transmission assembly 220 moves downward relative to the scanning window 101 , the first transmission assembly 220 moves away from the scanning window 101 .

[0078] See also Figures 3 to 5 In some embodiments, the swing component 282 is a cam mechanism, and the calibration device further includes a limit component 290 and an elastic component 281.

[0079] In some embodiments, the elastic component 281 is used to apply an elastic force to the first plate 260 away from the limiting component 290, so that the cam mechanism remains in contact with the limiting component 290 during the rotation process.

[0080] In some embodiments, the elastic component 281 includes a spring having a spring hook, which can hook an extension portion on the first plate 270 or a screw head of a screw to apply an elastic force to the first plate 260 away from the limiting component 290.

[0081] In some embodiments, the limiting assembly 290 includes a roller 291 and a roller mounting plate 292 . The roller mounting plate 292 is provided with a rolling shaft. The roller 291 passes through the rolling shaft and can roll around the rolling shaft.

[0082] Furthermore, the cam mechanism keeps contacting the roller 291 during the rotation process, and the cam mechanism drives the roller 291 to roll around the rolling axis when the cam mechanism rotates, thereby reducing the friction between the cam mechanism and the limiting assembly 290 when the cam mechanism rotates.

[0083] Optionally, the roller 291 may be replaced by a material with a low friction coefficient.

[0084] Please refer to Figure 9 , Figure 9 It is an exploded view of the calibration component provided in an embodiment of the present application.

[0085] like Figure 9 As shown, the calibration assembly 240 includes a calibration plate 244 , a light homogenizing plate 243 , a backlight plate 242 , a calibration plate mounting plate 245 and a backlight plate mounting plate 241 , and the calibration device 1 further includes a calibration mounting member 285 .

[0086] Specifically, a specific calibration pattern is printed on the calibration plate 244, and the oral scanner can scan the calibration pattern to perform a calibration operation.

[0087] In some embodiments, the light diffuser 243 is a transparent or translucent structure.

[0088] Optionally, the light diffuser 243 is a plastic light diffuser.

[0089] In some embodiments, the calibration plate 244 is a transparent or translucent structure.

[0090] Optionally, the calibration plate 244 is a glass calibration plate.

[0091] Specifically, the light doubling plate 243 is disposed between the calibration plate 244 and the backlight plate 242 . The light doubling plate 243 is used to uniformly illuminate the calibration pattern on the calibration plate 244 with the backlight emitted by the backlight plate 242 .

[0092] Specifically, the light homogenizer 243 can make the backlight emitted by the backlight plate 242 appear more uniform and soft on the calibration plate 244 , thereby improving the clarity and fidelity of the pattern on the calibration plate 244 .

[0093] In some embodiments, a plurality of light sources are disposed on the backlight panel 242 .

[0094] Exemplarily, multiple rows of LED light groups are provided on the backlight panel 242 , and each row of LED light groups includes multiple LED lights.

[0095] Furthermore, the calibration device 1 in the present application includes a first base body 100 and a second base body 300. Therefore, if there is no backlight panel 242, the image taken by the oral scanner will be blurred due to lack of light during the calibration process. Therefore, the backlight panel 242 is set in the present application to provide a light source in a closed environment.

[0096] In some embodiments, the backlight panel 242 is installed on the backlight panel mounting plate 241, and the calibration plate 244 and the light homogenizing plate 243 are installed on the calibration plate mounting plate 245. After installation, the calibration plate mounting plate 245 and the backlight panel mounting plate 241 form a calibration assembly 240.

[0097] In some embodiments, the calibration component 240 is mounted on the first mounting surface of the calibration mounting member 285, and the first mounting surface and the scanning window 101 have a certain angle, that is, the first mounting surface and the plane where the scanning window is located are not parallel, so that it is easier to distinguish the distance changes, swing changes and rotation changes of the calibration component 240 during calibration.

[0098] See also Figure 6 、 Figure 7 and Figure 9In some embodiments, the calibration device 1 further includes a conductive slip ring 74, the power cord passes through the conductive slip ring 283 and is arranged on the backlight panel mounting plate 241, one end of the power cord is connected to the backlight panel 242, and the power cord supplies power to the light source in the backlight panel 242. Through the above structure, the power cord on the conductive slip ring 283 rotates synchronously with the rotation of the calibration component 240, and the power cord will not be worn or even damaged due to the rotation. Even if the calibration component 240 rotates 360 degrees, the power will not be cut off.

[0099] See also Figure 1 、 Figure 2 、 Figure 6 and Figure 9 In some embodiments, the calibration component 240 includes a calibration plate 244 , and the first plate 270 has an opening 272 ; the oral scanner scans the calibration plate 244 on the calibration component 240 through the scanning window 101 and the opening 272 .

[0100] Because the calibration component 240 is located between the first plate 270 and the second plate 260 in the height direction in the present application, an opening 272 is provided on the first plate 270 to prevent the scanning path from being blocked and affecting the calibration effect.

[0101] Please refer to Figure 8 , Figure 8 This is a second cross-sectional view of the calibration module provided in an embodiment of the present application.

[0102] See also Figure 6 and Figure 8 In some embodiments, the swing assembly 230 includes a first transmission wheel 231, a second transmission wheel 232 and a transmission belt 233, and the transmission belt 233 is sleeved on the first transmission wheel 231 and the second transmission wheel 232; the first transmission wheel 231 is connected to the first transmission assembly 240; and the second transmission wheel 232 is connected to the calibration assembly 240.

[0103] Optionally, the radius of the first transmission wheel 231 is greater than the radius of the second transmission wheel 232 to prevent the calibration component 240 from rotating too fast and affecting the photographing effect of the oral scanner.

[0104] See also Figure 4 、 Figure 5 、 Figure 6 and Figure 8 In some embodiments, the first transmission component 220 is a screw, and the calibration device 1 also includes a nut 271 that cooperates with the screw; the driving component 210 is used to drive the screw to rotate, and the nut 271 is used to make the screw move relative to the scanning window 101 when the screw rotates.

[0105] In some embodiments, the nut 271 is fixed to the first plate 270, and the first plate 270 is fixed to the base 250, so that the first plate 270 is stationary relative to the scanning window 101 during the movement of the screw, and the nut 271 provides support force for the screw, and the components connected to the screw, such as the above-mentioned second plate 260, calibration assembly 240, drive assembly 210, swing assembly 282 and second transmission assembly 230.

[0106] In some embodiments, the first end of the screw rod is passed through the nut 271 , and the second end of the screw rod is passed through the first transmission wheel 232 .

[0107] In the above structure, the screw rod can directly drive the first transmission wheel 232 to rotate.

[0108] In some embodiments, the driving assembly 210 has a hollow structure, and the lead screw passes through the hollow structure of the driving assembly 210 and drives the driving assembly 210 to move relative to the scanning window.

[0109] Optionally, the driving component 210 is a hollow stepping motor, a hollow servo motor, etc.

[0110] In summary, the present application provides a calibration device for an oral scanner, comprising: a first base, a second base, and a calibration module, the calibration module comprising a calibration assembly, the calibration assembly comprising a calibration plate and a backlight panel; the first base is fixed to the second base, the first and second bases forming an internal cavity; the calibration module is disposed in the internal cavity and fixed to the second base; the first base is provided with a scanning window, the scanning window being used for the oral scanner to scan the calibration assembly, the calibration pattern on the calibration plate in the calibration assembly facing the scanning window; the backlight panel is disposed on a side of the calibration plate away from the scanning window, the backlight panel being used to emit backlight toward the calibration plate. The present application provides backlighting for the calibration plate in the internal cavity formed by the first and second bases through the backlight panel, allowing the oral scanner to capture clear and accurate images and preventing ambient light from interfering with the calibration process.

[0111] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A calibration device for an oral scanner, characterized in that: The calibration device includes: a first base, a second base and a calibration module, the calibration module includes a calibration component, and the calibration component includes a calibration plate and a backlight plate; The first base body is fixed to the second base body, and the first base body and the second base body form an internal cavity; The calibration module is disposed in the internal cavity and fixed to the second base; The first base is provided with a scanning window, the scanning window being used for the oral scanner to scan the calibration component, and the calibration pattern on the calibration plate in the calibration component faces the scanning window; The backlight plate is arranged on a side of the calibration plate away from the scanning window, and is used for emitting backlight to the calibration plate.

2. The calibration device according to claim 1, characterized in that: The calibration plate is a transparent or translucent structure.

3. The calibration device according to claim 2, characterized in that: A light doubling plate is provided between the backlight plate and the calibration plate, and the light doubling plate is used to make the backlight emitted by the backlight plate evenly illuminate the calibration pattern on the calibration plate.

4. The calibration device according to claim 3, characterized in that: The light diffuser is a transparent or semi-transparent structure.

5. The calibration device according to claim 1, characterized in that: The calibration device also includes a calibration mounting member; The calibration component is fixed on a first mounting surface of the calibration mounting member, and the first mounting surface is not parallel to a plane where the scanning window is located.

6. The calibration device according to claim 5, characterized in that: The calibration device also includes a conductive slip ring and a power line; The calibration installation piece has a hollow structure, and the conductive slip ring is plugged into the hollow structure of the calibration installation piece; The power line passes through the conductive slip ring, and one end of the power line is connected to the backlight panel. The power line supplies power to a light source that emits backlight on the backlight panel.

7. The calibration device according to claim 1, characterized in that: The calibration device includes: a driving assembly, a first transmission assembly, and a second transmission assembly; The driving assembly is used to drive the first transmission assembly to rotate and move relative to the scanning window; The calibration component is connected to the first transmission component, and the calibration component moves relative to the scanning window following the first transmission component; The second transmission assembly is connected to the first transmission assembly and the calibration assembly, and the second transmission assembly is used to make the calibration assembly rotate following the first transmission assembly.

8. The calibration device according to claim 7, characterized in that: The calibration device also includes a swing assembly; The swing assembly is connected to the calibration assembly and the second transmission assembly; The second transmission assembly is also used to drive the swing assembly to rotate; When the swing component rotates, the calibration component is driven to reciprocate.

9. The calibration device according to claim 7, characterized in that: The second transmission assembly includes a first transmission wheel, a second transmission wheel and a transmission belt, and the transmission belt is sleeved on the first transmission wheel and the second transmission wheel; The first transmission wheel is connected to the first transmission assembly; The second transmission wheel is connected to the calibration component.

10. The calibration device according to claim 7, characterized in that: The first transmission component is a screw rod, and the calibration device further includes a nut matched with the screw rod; The driving assembly is used to drive the lead screw to rotate, and the nut is used to make the lead screw move relative to the scanning window when the lead screw rotates.

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