Non-contact oral implant drill size calibration device

Abstract

The utility model provides a kind of non-contact oral implant drill size calibration device, including bearing main body, calibration window, first orthogonal light source, second orthogonal light source, first orthogonal camera module and second orthogonal camera module;The bearing main body includes bearing bottom plate, bearing top plate and multiple bearing side panels, and multiple positioning identification components are provided on bearing top plate;Calibration window is opened on the bearing top plate;First orthogonal camera module and second orthogonal camera module are provided with object side telecentric light path, and the optical axis of first orthogonal camera module and the optical axis of second orthogonal camera module are perpendicular to each other.Combination of first orthogonal light source, second orthogonal light source, first orthogonal camera module and second orthogonal camera module obtains mutually orthogonal first orthogonal two-dimensional image and second orthogonal two-dimensional image, and the non-contact calibration of drill size is realized by combining existing image processing technology, which can avoid pollution drill, effectively guarantee navigation accuracy and treatment effect.

Description

Technical Field

[0001] This utility model relates to the field of medical equipment technology, and to a calibration device for non-contactly calibrating the size of dental implant drills before performing oral treatment surgery. Background Technology

[0002] During oral surgery, especially dental implant surgery, the surgical navigation system needs to obtain the spatial position and size parameters of the implant drill bit in real time to guide the doctor to accurately control the drilling depth and angle, ensure that the ideal implant hole is drilled through the drill bit, and effectively avoid damage to key oral anatomical structures such as the nerve canal and maxillary sinus during the drilling process.

[0003] Before implementing surgical navigation, the implantation drill bit needs to be calibrated. Calibration determines the drill bit's length and diameter in the optical three-dimensional coordinate system of the binocular navigation system. This allows the binocular navigation system to acquire the real-time pose of the implantation handpiece, thereby determining the drill bit's real-time pose. In existing technologies, drill bit calibration primarily relies on contact calibration plates and manual length selection. During calibration, the drill bit is placed against a calibration plate, and the drill bit's length and diameter are calculated by identifying the real-time poses of the calibration plate tracker on the calibration plate and the handpiece tracker on the implantation handpiece.

[0004] The above-mentioned dental implant drill bit size calibration method requires placing the drill bit against a calibration plate, which has the following technical drawbacks: firstly, calibration by contact carries the risk of drill bit contamination; secondly, measurement accuracy depends on the operator's technique and the force applied. Therefore, the industry urgently needs to develop a new drill bit size calibration device to solve the aforementioned problems. Utility Model Content

[0005] The technical problem to be solved by this utility model is to provide a non-contact dental implant drill bit size calibration device to address the above-mentioned deficiencies of the prior art. Based on this device, high-precision calibration of drill bit length and drill bit diameter can be achieved, effectively ensuring navigation accuracy and treatment effect.

[0006] The technical solution adopted by this utility model to solve the technical problem is as follows: A non-contact dental implant drill bit size calibration device includes: The supporting body includes a supporting base plate, a supporting top plate, and multiple supporting side panels. The supporting base plate, the supporting top plate, and the multiple supporting side panels form a cavity structure. Multiple positioning markers are provided on the supporting top plate. A calibration window is provided on the top support plate. A first orthogonal light source, a second orthogonal light source, a first orthogonal camera module, and a second orthogonal camera module are fixedly disposed in a cavity structure within the supporting body. The first orthogonal camera module and the second orthogonal camera module are provided with object-side telecentric optical paths. The first orthogonal light source and the first orthogonal camera module are respectively located on opposite sides of the calibration window, and the second orthogonal light source and the second orthogonal camera module are respectively located on opposite sides of the calibration window. The optical axes of the first orthogonal camera module and the second orthogonal camera module are perpendicular to each other.

[0007] Compared with the prior art, the beneficial effects of this technical solution are: by cooperating with the first orthogonal light source, the second orthogonal light source, the first orthogonal camera module, and the second orthogonal camera module, a first orthogonal two-dimensional image and a second orthogonal two-dimensional image that are mutually orthogonal are obtained. Combined with existing image processing technology, non-contact calibration of drill bit size can be achieved, which can avoid contaminating the drill bit and effectively ensure navigation accuracy and treatment effect.

[0008] Furthermore, the first orthogonal light source and the second orthogonal light source include a PCB board, a plurality of LEDs, and a light diffuser plate. The LEDs are disposed on the PCB board. The light diffuser plate has a first elongated pad and a second elongated pad protruding outward on opposite sides. The light diffuser plate is fixed to the PCB board by the first elongated pad and the second elongated pad. The LEDs are located between the PCB board and the light diffuser plate. The light diffuser plates on the first orthogonal light source and the light diffuser plates on the second orthogonal light source are perpendicular to each other.

[0009] The advantages of adopting the above solution are: the surface light source is formed by the parallel PCB board and the light-diffusing plate, which facilitates the provision of parallel light; and the light-diffusing plate is fixed to the PCB board by the first elongated pad and the second elongated pad, forming a gap between the light-diffusing plate and the PCB board, which can improve the heat dissipation effect.

[0010] Furthermore, the bearing side panel is provided with a first vertical limiting strip and a second vertical limiting strip; the first orthogonal light source abuts against one side of the first vertical limiting strip, and the second orthogonal camera module abuts against the other side of the first vertical limiting strip; the second orthogonal light source abuts against one side of the second vertical limiting strip, and the first orthogonal camera module abuts against the other side of the second vertical limiting strip. The first orthogonal light source, the second orthogonal light source, the first orthogonal camera module, and the second orthogonal camera module are fixedly installed inside the supporting body by locking bolts.

[0011] The beneficial effects of adopting the above scheme are: by using the first vertical limiting strip and the second vertical limiting strip, together with the locking bolts, the first orthogonal light source, the second orthogonal light source, the first orthogonal camera module and the second orthogonal camera module are fixedly installed in the supporting body, thereby improving the structural stability of the device.

[0012] Furthermore, the calibration window is located on the top plate of the bearing plate near the bearing side panel, and the upper edge of the bearing side panel forms a positioning recess, which is located next to the calibration window.

[0013] The advantages of adopting the above scheme are: a positioning recess is provided next to the calibration window, which makes it easy to insert the drill bit of the implantation mobile phone into the calibration window, preventing the implantation mobile phone and the drill bit from shifting during the drill bit size calibration process, which helps to improve the convenience of operation and the accuracy of calibration.

[0014] Furthermore, the object-side telecentric optical path includes a first plano-convex lens, a meniscus lens, a first plano-concave lens, a second plano-concave lens, a biconvex lens, and a second plano-concave lens arranged in sequence. The drill bit to be calibrated is located on the side of the first plano-convex lens away from the meniscus lens, and the CCD photosensitive elements on the first orthogonal camera module and the second orthogonal camera module are located on the side of the second plano-concave lens away from the biconvex lens.

[0015] The beneficial effects of adopting the above scheme are: by forming a telecentric optical path on the object side through the first plano-convex lens, meniscus lens, first plano-concave lens, second plano-concave lens, biconvex lens and second plano-concave lens, it is possible to ensure that the incident light rays from the outside remain parallel, prevent the drill bit imaging size from being different due to different positions, and further improve the accuracy of size calibration.

[0016] Furthermore, the first orthogonal camera module and the second orthogonal camera module also include a camera carrier, on which multiple lens fixing platforms are provided, and multiple annular locking components are also provided. The first plano-convex lens, the meniscus lens, the first plano-concave lens, the second plano-concave mirror, the biconvex lens, and the second plano-concave lens are directly or indirectly pressed and fixed onto the corresponding lens fixing platform by the annular locking member.

[0017] The beneficial effects of adopting the above scheme are: by pressing and fixing the first plano-convex lens, meniscus lens, first plano-concave lens, second plano-concave lens, biconvex lens and second plano-concave lens onto the lens fixing platform through the ring locking component, the structural stability of the object-side telecentric optical path can be improved, and the optical path can be prevented from changing and affecting the calibration accuracy.

[0018] Furthermore, the annular locking member is provided with an external threaded connection part, and the camera carrier is provided with an internal threaded connection part. The annular locking member is fixedly installed in the camera carrier by the external threaded connection part and the internal threaded connection part engaging with each other.

[0019] The advantages of adopting the above solution are: the ring locking part is fixed on the camera carrier by the threaded engagement between the external threaded connection part and the internal threaded connection part on the camera carrier part, which has the advantages of strong structure and easy disassembly and assembly.

[0020] Furthermore, the top plate of the support is provided with a plurality of positioning grooves for the markers, the positioning markers are fixedly disposed in the positioning grooves for the markers, and the upper surface of the positioning markers is flush with the upper surface of the top plate of the support. The positioning marker includes a positioning marker plate and a positioning marker pattern disposed on the positioning marker plate. The positioning marker pattern includes a first white triangular area, a second white triangular area, a first black fan-shaped area, and a second black fan-shaped area. The first white triangular area and the second white triangular area are arranged opposite to each other, and the first black fan-shaped area and the second black fan-shaped area are arranged opposite to each other. The first white triangular area, the second white triangular area, the first black fan-shaped area, and the second black fan-shaped area together form an elliptical positioning marker pattern.

[0021] The advantages of adopting the above scheme are: by fixing the positioning marker to the bearing top plate through the positioning groove of the marker and making the positioning marker flush with the upper surface of the bearing top plate, it is possible to avoid the positioning marker protruding from the surface of the device and causing damage to external personnel and objects during use; by forming a positioning marker pattern with a prominent center and clear black and white distinction by the first white triangular area, the second white triangular area, the first black fan-shaped area and the second black fan-shaped area, it is more convenient for the optical positioning instrument to capture the real-time image of the positioning marker.

[0022] Furthermore, the supporting bottom plate, the supporting top plate, and the supporting side plate are square plate structures, with the supporting top plate disposed above the supporting bottom plate and the supporting side plate disposed between the supporting bottom plate and the supporting top plate; The supporting base plate has multiple strip-shaped through holes formed by hollowing out.

[0023] The beneficial effects of adopting the above solution are: multiple strip-shaped through holes are formed on the bearing base plate through hollowing out, which can prevent water accumulation inside during use and also play a non-slip role, making it easier for operators to grip and control.

[0024] Furthermore, the supporting base plate, the supporting top plate, and the supporting side panel are made of aerospace aluminum alloy, and the supporting base plate, the supporting top plate, and the supporting side panel are fixed to each other by connecting bolts.

[0025] The advantages of adopting the above scheme are: using an aerospace aluminum alloy structure as the load-bearing base plate, load-bearing top plate, and load-bearing side panel can improve the strength of the device while reducing its weight; the load-bearing base plate, load-bearing top plate, and load-bearing side panel are fixed to each other by connecting bolts, which facilitates the installation and disassembly of the device while ensuring the structural stability of the device. Attached Figure Description

[0026] Figure 1 This is an overall schematic diagram of the non-contact dental implant drill bit size calibration device of this utility model.

[0027] Figure 2 This is an exploded view of the non-contact dental implant drill bit size calibration device of this utility model.

[0028] Figure 3 This is another exploded schematic diagram of the non-contact dental implant drill bit size calibration device of this utility model.

[0029] Figure 4 This is an exploded view of one of the first orthogonal light source 3 and the second orthogonal light source 4 in the non-contact dental implant drill bit size calibration device of this utility model.

[0030] Figure 5 This is an exploded schematic diagram of the telecentric optical path in the non-contact dental implant drill bit size calibration device of this utility model.

[0031] The components represented by each number in the diagram are listed below: 1. Supporting body; 2. Calibration window; 3. First orthogonal light source; 4. Second orthogonal light source; 5. First orthogonal camera module; 6. Second orthogonal camera module; Support base plate 101, support top plate 102, support side panel 103, positioning marker 104, first vertical limiting strip 105, second vertical limiting strip 106, strip-shaped through hole 107; Positioning recess 201; PCB board 301, LED bead 302, light diffuser 303, first elongated pad 304, second elongated pad 305, first plano-convex lens 306, meniscus lens 307, first plano-concave lens 308, second plano-concave lens 309, biconvex lens 310, second plano-concave lens 311, annular locking component 312. Detailed Implementation

[0032] To make the objectives, technical solutions, and advantages of this utility model clearer and more explicit, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0033] In the description of this utility model, it should be understood that the terms "center," "upper," "lower," "front," "rear," "left," and "right," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0034] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. When a component is referred to as being "fixed to" or "set on" another element, it can be directly on the other component or there may be an intervening component. When a component is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intervening component. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0035] During oral surgery, especially dental implant surgery, the surgical navigation system needs to obtain the spatial position and size parameters of the drill bit in real time to guide the doctor to accurately control the drilling depth and angle, ensure that the ideal implant hole is drilled through the drill bit, and effectively avoid damage to key oral anatomical structures such as the nerve canal and maxillary sinus during the drilling process.

[0036] Before implementing surgical navigation, the drill bit needs to be calibrated. Calibration determines the drill bit's length and diameter in the optical three-dimensional coordinate system of the binocular navigation system. This allows the binocular navigation system to acquire the real-time pose of the implantation handpiece, thereby determining the drill bit's real-time pose. In existing technologies, drill bit calibration primarily relies on contact calibration plates and manual length selection. During calibration, the drill bit is placed against a calibration plate, and the drill bit's length and diameter are calculated by identifying the real-time poses of the calibration plate tracker on the calibration plate and the handpiece tracker on the implantation handpiece.

[0037] The above-mentioned dental implant drill bit size calibration method requires placing the drill bit against a calibration plate, which has the following technical drawbacks: firstly, calibration by contact carries the risk of drill bit contamination; secondly, measurement accuracy depends on the operator's technique and the force applied. Therefore, the industry urgently needs to develop a new drill bit size calibration device to solve the aforementioned problems.

[0038] like Figure 1 , Figure 2 and Figure 3 As shown, in order to solve the above problems, this utility model provides a non-contact dental implant drill bit size calibration device, including a support body 1, a calibration window 2, a first orthogonal light source 3, a second orthogonal light source 4, a first orthogonal camera module 5, and a second orthogonal camera module 6.

[0039] In this technical solution, the supporting body 1 serves two purposes: firstly, it supports structural components such as the calibration window 2, the first orthogonal light source 3, the second orthogonal light source 4, the first orthogonal camera module 5, and the second orthogonal camera module 6 within the device; secondly, it forms a relatively enclosed space to isolate the influence of external light on the imaging. The first orthogonal light source 3 and the first orthogonal camera module 5 cooperate to obtain a first orthogonal two-dimensional image; the second orthogonal light source 4 and the second orthogonal camera module 6 cooperate to obtain a second orthogonal two-dimensional image.

[0040] The supporting body 1 includes a supporting base plate 101, a supporting top plate 102, and multiple supporting side panels 103. In this technical solution, the supporting base plate 101, the supporting top plate 102, and the supporting side panels 103 are preferably square plate structures. The supporting base plate 101 is located directly below the supporting top plate 102, while the supporting side panels 103 are located between the supporting base plate 101 and the supporting top plate 102, thereby forming a cavity structure through the supporting base plate 101, the supporting top plate 102, and the multiple supporting side panels 103.

[0041] The top support plate 102 is provided with multiple positioning markers 104, and a calibration window 2 is provided on the top support plate 102. The positioning markers 104 are used in conjunction with a binocular navigation system to collect the real-time position and orientation of the positioning markers 104, thereby determining the real-time position and orientation of the non-contact dental implant drill size calibration device. The calibration window 2 is used to form an opening in the cavity structure formed by the bottom support plate 101, the top support plate 102, and the multiple support side panels 103, allowing the drill bit on the implant handpiece to be inserted into the cavity structure from the outside to the inside.

[0042] The first orthogonal light source 3, the second orthogonal light source 4, the first orthogonal camera module 5, and the second orthogonal camera module 6 are fixedly disposed in the cavity structure inside the supporting body 1, which can isolate the negative impact of external light on imaging.

[0043] The first orthogonal light source 3 and the first orthogonal camera module 5 are located on opposite sides of the calibration window 2, and the second orthogonal light source 4 and the second orthogonal camera module 6 are located on opposite sides of the calibration window 2. The optical axis of the first orthogonal camera module 5 and the optical axis of the second orthogonal camera module 6 are perpendicular to each other. The light emitted by the first orthogonal light source 3 is collected by the first orthogonal camera module 5, and the light emitted by the second orthogonal light source 4 is collected by the second orthogonal camera module 6.

[0044] During use, when the drill bit penetrates the cavity structure, some of the light emitted by the first orthogonal light source 3 is blocked by the drill bit, and the first orthogonal camera module 5 acquires a first orthogonal two-dimensional image, which shows the outline of the drill bit. Similarly, some of the light emitted by the second orthogonal light source 4 is blocked by the drill bit, and the second orthogonal camera module 6 acquires a second orthogonal two-dimensional image, which also shows the outline of the drill bit. Preferably, both the first orthogonal camera module 5 and the second orthogonal camera module 6 are equipped with an object-side telecentric optical path and a CCD photosensitive element. The object-side telecentric optical path ensures that the first orthogonal light source 3 and the second orthogonal light source 4 are parallel light sources. The CCD photosensitive element captures the first and second orthogonal two-dimensional images, thus ensuring that the image size of the drill bit is completely consistent with the actual object regardless of its position.

[0045] Since the optical axes of the first orthogonal camera module 5 and the second orthogonal camera module 6 are perpendicular to each other, the first orthogonal two-dimensional image acquired by the first orthogonal camera module 5 and the second orthogonal two-dimensional image acquired by the second orthogonal camera module 6 are orthogonal to each other. For the calibration body's three-dimensional coordinate system of the non-contact dental implant drill size calibration device, the coordinate information in the first dimension can be determined through the first orthogonal two-dimensional image, the coordinate information in the second dimension can be determined through the second orthogonal two-dimensional image, and the coordinate information in the third dimension can be determined through the drill penetration depth parameter. The depth parameter is reflected in both the first and second orthogonal two-dimensional images. Thus, the three-dimensional coordinate data of the drill bit in the calibration body's three-dimensional coordinate system are completely determined. It should be noted that the method and steps for calculating dimensions using image analysis technology are existing, mature technologies and are not innovative aspects of this device. This device aims to provide structural improvements. By cooperating with the first orthogonal light source 3, the second orthogonal light source 4, the first orthogonal camera module 5, and the second orthogonal camera module 6, mutually orthogonal first and second orthogonal two-dimensional images are obtained. Combined with existing image processing technology, non-contact calibration of drill bit size can be achieved, which can avoid contaminating the drill bit and effectively ensure navigation accuracy and treatment effect.

[0046] like Figure 4As shown, preferably, the first orthogonal light source 3 and the second orthogonal light source 4 include a PCB board 301, a plurality of LED beads 302, and a light diffusion plate 303. The LED beads 302 are disposed on the PCB board 301 and are located between the PCB board 301 and the light diffusion plate 303. By disposing of a plurality of LED beads 302 on the PCB board 301 and covering the PCB board 301 with the light diffusion plate 303, a surface light source can be formed based on the PCB board 301 and the light diffusion plate 303. At the same time, by using the light diffusion plate 303 to convert the multiple point light sources formed by the plurality of LED beads 302 into a surface light source, stable parallel light can be ensured.

[0047] like Figure 4 As shown, preferably, the light-diffusing plate 303 has a first elongated pad 304 and a second elongated pad 305 protruding outwards on opposite sides. The light-diffusing plate 303 is fixed to the PCB board 301 by the first elongated pad 304 and the second elongated pad 305. The light-diffusing plate 303 on the first orthogonal light source 3 and the light-diffusing plate 303 on the second orthogonal light source 4 are perpendicular to each other.

[0048] Based on the above structure, the light-diffusing plate 303 is fixed to the PCB board 301 by the first elongated pad 304 and the second elongated pad 305, forming a gap between the light-diffusing plate 303 and the PCB board 301, which can improve the heat dissipation effect. The light-diffusing plates 303 on the first orthogonal light source 3 and the second orthogonal light source 4 are perpendicular to each other, which can cooperate with the first orthogonal camera module 5 and the second orthogonal camera module 6, whose optical axes are perpendicular to each other, to obtain mutually orthogonal first and second orthogonal two-dimensional images.

[0049] like Figure 3 As shown, preferably, the bearing side panel 103 is provided with a first vertical limiting strip 105 and a second vertical limiting strip 106; the first orthogonal light source 3 abuts against one side of the first vertical limiting strip 105, and the second orthogonal camera module 6 abuts against the other side of the first vertical limiting strip 105; the second orthogonal light source 4 abuts against one side of the second vertical limiting strip 106, and the first orthogonal camera module 5 abuts against the other side of the second vertical limiting strip 106; the first orthogonal light source 3, the second orthogonal light source 4, the first orthogonal camera module 5 and the second orthogonal camera module 6 are fixedly disposed in the bearing body 1 by locking bolts.

[0050] Based on the above structure, the first vertical limiting strip 105 and the second vertical limiting strip 106, together with the locking bolts, fix the first orthogonal light source 3, the second orthogonal light source 4, the first orthogonal camera module 5 and the second orthogonal camera module 6 in the supporting body 1, thereby improving the structural stability of the device.

[0051] like Figure 1 As shown, the calibration window 2 is located on the top support plate 102 near the side support panel 103. The upper edge of the side support panel 103 forms a positioning recess 201, which is located next to the calibration window 2. Specifically, there are two positioning recesses 201.

[0052] In this technical solution, "non-contact" means that the drill bit does not contact other components during the calibration process. During the calibration of the drill bit size using this device, it is necessary to ensure that the relative position between the drill bit and the device remains fixed for a certain period. Therefore, a positioning recess 201 is provided next to the calibration window 2 to facilitate inserting the implantation handpiece's drill bit into the calibration window 2, preventing the implantation handpiece and drill bit from shifting during the drill bit size calibration process. This improves operational convenience and calibration accuracy.

[0053] like Figure 5 As shown, the object-side telecentric optical path includes a first plano-convex lens 306, a meniscus lens 307, a first plano-concave lens 308, a second plano-concave lens 309, a biconvex lens 310, and a second plano-concave lens 311 arranged in sequence. The drill bit to be calibrated is located on the side of the first plano-convex lens 306 away from the meniscus lens 307. The CCD photosensitive elements on the first orthogonal camera module 5 and the second orthogonal camera module 6 are located on the side of the second plano-concave lens 311 away from the biconvex lens 310.

[0054] Based on the above structure, the telecentric optical path of the object side is formed by the first plano-convex lens 306, the meniscus lens 307, the first plano-concave lens 308, the second plano-concave lens 309, the biconvex lens 310, and the second plano-concave lens 311, which can ensure that the incident light rays from the outside remain parallel, prevent the drill bit imaging size from being different due to different positions, and further improve the accuracy of size calibration.

[0055] like Figure 5 As shown, preferably, the first orthogonal camera module 5 and the second orthogonal camera module 6 further include a camera carrier. The camera carrier has multiple lens fixing platforms and multiple annular locking members 312. It should be noted that the lens fixing platforms are annular platforms located inside the camera carrier. The first plano-convex lens 306, the meniscus lens 307, the first plano-concave lens 308, the second plano-concave lens 309, the biconvex lens 310, and the second plano-concave lens 311 are directly or indirectly pressed and fixed onto their respective lens fixing platforms by the annular locking members 312.

[0056] By pressing and fixing the first plano-convex lens 306, the meniscus lens 307, the first plano-concave lens 308, the second plano-concave lens 309, the biconvex lens 310, and the second plano-concave lens 311 onto the lens fixing platform using the annular locking member 312, the structural stability of the object-side telecentric optical path can be improved, and the change of the optical path can be prevented from affecting the calibration accuracy.

[0057] Preferably, the annular locking member 312 is provided with an external threaded connection portion, and the camera carrier is provided with an internal threaded connection portion. The annular locking member 312 is fixedly disposed within the camera carrier through the threaded engagement of the external threaded connection portion and the internal threaded connection portion. The annular locking member 312 is fixedly disposed on the camera carrier through the threaded engagement of the external threaded connection portion and the internal threaded connection portion on the camera carrier, which has the advantages of robust structure and easy assembly and disassembly.

[0058] Preferably, the supporting top plate 102 is provided with a plurality of positioning grooves for the positioning elements, and the positioning marking element 104 is fixedly disposed in the positioning grooves, with the upper surface of the positioning marking element 104 flush with the upper surface of the supporting top plate 102. By fixing the positioning marking element 104 to the supporting top plate 102 through the positioning grooves and making the positioning marking element 104 flush with the upper surface of the supporting top plate 102, it is possible to avoid the positioning marking element 104 protruding from the surface of the device and causing damage to personnel and objects during use.

[0059] like Figure 1 As shown, the positioning marker 104 includes a positioning marker plate and a positioning marker pattern disposed on the positioning marker plate. The positioning marker pattern includes a first white triangular area, a second white triangular area, a first black fan-shaped area, and a second black fan-shaped area. The first white triangular area and the second white triangular area are arranged opposite to each other, and the first black fan-shaped area and the second black fan-shaped area are arranged opposite to each other. The first white triangular area, the second white triangular area, the first black fan-shaped area, and the second black fan-shaped area together form an elliptical positioning marker pattern.

[0060] The positioning marker pattern, composed of a first white triangular area, a second white triangular area, a first black fan-shaped area, and a second black fan-shaped area, features a prominent center and clear black and white distinction, making it easier for the optical positioning device to capture real-time images of the positioning marker 104.

[0061] like Figure 3As shown, the supporting base plate 101, the supporting top plate 102, and the supporting side panel 103 are square plate structures. The supporting top plate 102 is disposed above the supporting base plate 101, and the supporting side panel 103 is disposed between the supporting base plate 101 and the supporting top plate 102. The supporting base plate 101 has multiple strip-shaped through holes 107 formed by perforation. These perforated through holes 107 on the supporting base plate 101 serve two purposes: firstly, to prevent water accumulation during use, and secondly, to provide anti-slip properties, facilitating grip and control by the operator.

[0062] Preferably, the supporting base plate 101, the supporting top plate 102, and the supporting side panel 103 are made of aerospace-grade aluminum alloy, and are fixed together by connecting bolts. Using an aerospace-grade aluminum alloy structure for the supporting base plate 101, supporting top plate 102, and supporting side panel 103 improves the strength of the device while reducing its weight; the connection of the supporting base plate 101, supporting top plate 102, and supporting side panel 103 with connecting bolts facilitates installation and disassembly of the device while ensuring structural stability.

[0063] It should be understood that the application of this utility model is not limited to the examples above. Those skilled in the art can make improvements or modifications based on the above description, and all such improvements and modifications should fall within the protection scope of the appended claims.

Claims

1. A non-contact dental implant drill bit size calibration device, characterized in that, include: The supporting body includes a supporting base plate, a supporting top plate, and multiple supporting side panels. The supporting base plate, the supporting top plate, and the multiple supporting side panels form a cavity structure. Multiple positioning markers are provided on the supporting top plate. A calibration window is provided on the top support plate. A first orthogonal light source, a second orthogonal light source, a first orthogonal camera module, and a second orthogonal camera module are fixedly disposed in a cavity structure within the supporting body. The first orthogonal camera module and the second orthogonal camera module are provided with object-side telecentric optical paths. The first orthogonal light source and the first orthogonal camera module are respectively located on opposite sides of the calibration window, and the second orthogonal light source and the second orthogonal camera module are respectively located on opposite sides of the calibration window. The optical axes of the first orthogonal camera module and the second orthogonal camera module are perpendicular to each other.

2. The non-contact dental implant drill size calibration device according to claim 1, characterized in that, The first orthogonal light source and the second orthogonal light source each include a PCB board, multiple LEDs, and a light diffuser plate. The LEDs are disposed on the PCB board. The light diffuser plate has a first elongated pad and a second elongated pad protruding outwards on opposite sides. The light diffuser plate is fixed to the PCB board by the first elongated pad and the second elongated pad. The LEDs are located between the PCB board and the light diffuser plate. The light diffuser plates on the first orthogonal light source and the second orthogonal light source are perpendicular to each other.

3. The non-contact dental implant drill size calibration device according to claim 2, characterized in that, The bearing side panel is provided with a first vertical limiting strip and a second vertical limiting strip; the first orthogonal light source abuts against one side of the first vertical limiting strip, and the second orthogonal camera module abuts against the other side of the first vertical limiting strip; the second orthogonal light source abuts against one side of the second vertical limiting strip, and the first orthogonal camera module abuts against the other side of the second vertical limiting strip. The first orthogonal light source, the second orthogonal light source, the first orthogonal camera module, and the second orthogonal camera module are fixedly installed inside the supporting body by locking bolts.

4. The non-contact dental implant drill size calibration device according to claim 1, characterized in that, The calibration window is located on the top plate of the bearing, near the side panel of the bearing. The upper edge of the side panel of the bearing forms a positioning recess, which is located next to the calibration window.

5. The non-contact dental implant drill bit size calibration device according to claim 1, characterized in that, The object-side telecentric optical path includes a first plano-convex lens, a meniscus lens, a first plano-concave lens, a second plano-concave lens, a biconvex lens, and a second plano-concave lens arranged in sequence. The drill bit to be calibrated is located on the side of the first plano-convex lens away from the meniscus lens. The CCD photosensitive elements on the first orthogonal camera module and the second orthogonal camera module are located on the side of the second plano-concave lens away from the biconvex lens.

6. The non-contact dental implant drill size calibration device according to claim 5, characterized in that, The first orthogonal camera module and the second orthogonal camera module also include a camera carrier, on which multiple lens fixing platforms are provided, and multiple annular locking components are also provided. The first plano-convex lens, the meniscus lens, the first plano-concave lens, the second plano-concave mirror, the biconvex lens, and the second plano-concave lens are directly or indirectly pressed and fixed onto the corresponding lens fixing platform by the annular locking member.

7. A non-contact dental implant drill size calibration device according to claim 6, characterized in that, The annular locking member is provided with an external threaded connection part, and the camera carrier is provided with an internal threaded connection part. The annular locking member is fixedly installed in the camera carrier by the threaded engagement of the external threaded connection part and the internal threaded connection part.

8. The non-contact dental implant drill size calibration device according to claim 1, characterized in that, The top plate of the support is provided with a plurality of positioning grooves for the markers, and the positioning markers are fixedly set in the positioning grooves for the markers, with the upper surface of the positioning markers being flush with the upper surface of the top plate of the support. The positioning marker includes a positioning marker plate and a positioning marker pattern disposed on the positioning marker plate. The positioning marker pattern includes a first white triangular area, a second white triangular area, a first black fan-shaped area, and a second black fan-shaped area. The first white triangular area and the second white triangular area are arranged opposite to each other, and the first black fan-shaped area and the second black fan-shaped area are arranged opposite to each other. The first white triangular area, the second white triangular area, the first black fan-shaped area, and the second black fan-shaped area together form an elliptical positioning marker pattern.

9. A non-contact dental implant drill bit size calibration device according to any one of claims 1-8, characterized in that, The supporting base plate, the supporting top plate, and the supporting side plate are square plate structures. The supporting top plate is disposed above the supporting base plate, and the supporting side plate is disposed between the supporting base plate and the supporting top plate. The supporting base plate has multiple strip-shaped through holes formed by hollowing out.

10. A non-contact dental implant drill size calibration device according to any one of claims 1-8, characterized in that, The supporting base plate, the supporting top plate, and the supporting side panel are made of aerospace aluminum alloy and are fixed to each other by connecting bolts.

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