An extra-oral 3D scanning measuring instrument

Abstract

This utility model provides a 3D scanning and measuring instrument for external oral cavity, relating to the field of scanning and measuring devices. It includes a main body with an interface into which a wire is inserted. A positioning plate is located outside the interface, and an anti-torsion sleeve is connected to the outer periphery of the front opening of the positioning plate. A limiting plate is connected to the upper part of the outer wall of the interface. The positioning plate can move up and down relative to the limiting plate, and a reset structure constrains the anti-torsion sleeve. This application, by setting a positioning plate, anti-torsion sleeve, and reset structure outside the interface, constrains the wire / cable to move in one direction within the groove of the anti-torsion sleeve, effectively avoiding shear stress caused by non-axial torsion of the cable. It solves the wear problem caused by periodic stress at the wire connection point, significantly improves the connection reliability of the interface, and ensures the normal use of the equipment and the long-term stability of data transmission.

Description

Technical Field

[0001] This utility model relates to the field of scanning measurement devices, and in particular to a 3D scanning measurement instrument for external oral cavity. Background Technology

[0002] In the field of dental implant restoration and prosthesis design, accurately obtaining implant placement data for edentulous patients is crucial to ensuring surgical success and prosthesis comfort. Traditional oral impression methods have significant shortcomings. Contact impressions can cause patients a foreign body sensation and discomfort, and the procedure is cumbersome, time-consuming, and results in a poor patient experience.

[0003] With the development of medical technology, non-contact 3D external oral scanning and measurement instruments are gradually being applied in clinical practice. These devices employ high-precision image detection and measurement technology to accurately acquire implant position data in edentulous patients, providing precise input information for denture design. This effectively improves surgical success rates and patient satisfaction, achieving precise and comfortable treatment results. Their convenient design overcomes the limitations of traditional impression-taking methods; non-contact impression taking avoids the feeling of a foreign object, reduces patient discomfort, greatly saves time in oral treatment, and enhances patient comfort.

[0004] Currently, this scanner typically connects to a computer via an interface at the rear for high-speed data transmission and power supply. It generally uses a charging interface, supporting immediate use with no restrictions on charging location, making it convenient to use. However, in clinical operation, doctors need to frequently adjust the angle of the handheld device, which causes non-axial twisting of the connecting cable, creating periodic shear stress between the plug and the interface. Over time, this stress can cause wear at the wire connection points, leading to decreased interface reliability and affecting the normal use of the device and the stability of data transmission.

[0005] Therefore, a 3D scanning measurement instrument for external oral cavity is proposed. Utility Model Content

[0006] To solve the above-mentioned technical problems, the present invention provides a solution to the wear problem caused by periodic stress at the wire connection points.

[0007] To achieve the above objectives, the present invention adopts the following technical solution:

[0008] An external oral cavity 3D scanning measuring instrument includes a measuring instrument body with an interface. A wire is inserted into the interface. A positioning plate is provided outside the interface. An anti-torsion sleeve is connected to the outer periphery of the front opening of the positioning plate. The cable of the wire passes axially from the inside of the positioning plate to the outside of the anti-torsion sleeve and is constrained to move in a single direction within the groove of the anti-torsion sleeve. A limit plate is connected above the outer wall of the interface. The positioning plate can move up and down relative to the limit plate and forms a constraint on the anti-torsion sleeve through the cooperation of a reset structure.

[0009] Preferably, the positioning plate is bent inward in the lower direction to provide a lower baffle, the surface of the lower baffle is provided with a second protective layer, the lower baffle is located below the wire insertion head, and the second protective layer is in contact with the bottom of the wire insertion head.

[0010] Preferably, the reset structure includes movable shafts symmetrically connected to both sides of the lower baffle. One end of the movable shaft can slide through a corresponding hole in the limiting plate, and the other end of the movable shaft is provided with an end plate. A positioning spring is sleeved on the movable shaft, with one end of the positioning spring abutting against the end plate and the other end abutting against the limiting plate.

[0011] Preferably, the anti-torsion sleeve has a semi-open design, and the curvature of its bottom inner wall is adapted to the outlet path of the wire and cable.

[0012] Preferably, the inner wall of the guide groove of the anti-torsion sleeve is provided with a first protective layer, which is made of rubber and is in contact with the outer surface of the wire and cable.

[0013] Preferably, the end plate is threadedly connected to the threaded hole at the top of the movable shaft via a screw.

[0014] Preferably, the positioning plate and the lower baffle are integrally formed, the positioning plate is located at the front end of the wire insertion head, and the positioning plate, the lower baffle and the limiting plate surround each other to form a space, restricting the wire insertion head to the outer peripheral wall of the interface insertion port.

[0015] Preferably, magnetic blocks are connected to both sides of the top surface of the positioning plate, and the magnetic blocks and the magnetic or ferromagnetic materials disposed at corresponding positions on the bottom surface of the limiting plate generate a magnetic attraction.

[0016] Preferably, the bottom ends of the movable shafts on both sides pass through the lower baffle, and the bottom ends of the movable shafts on both sides are horizontally connected by a connecting rod, with a pull ring integrally formed in the middle of the connecting rod.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] The oral cavity external 3D scanning and measuring instrument provided in this application, by setting a positioning plate, an anti-torsion sleeve, and a reset structure on the outside of the interface, constrains the wires and cables to move in one direction within the groove of the anti-torsion sleeve, effectively avoiding shear stress caused by non-axial torsion of the cable. This solves the problem of wear caused by periodic stress at the wire connection point, significantly improves the connection reliability of the interface, and ensures the normal use of the equipment and the long-term stability of data transmission.

[0019] The lower baffle below the positioning plate and the second protective layer on its surface, together with the limiting plate, constrain the upper and lower ends of the wire insertion head, further limiting the movement space of the exposed part of the plug. Even if the wire is accidentally pulled, the relative displacement between the plug and the interface can be reduced by the bidirectional upper and lower limiting, avoiding poor contact or connection failure caused by loosening.

[0020] The anti-torsion sleeve's semi-open arc adapts to the cable exit path, and combined with the inner wall's rubber first protective layer, it guides the cable's axial movement while reducing rigid friction through flexible contact. This design ensures smooth cable exit and further reduces the wear rate during long-term use through material cushioning, extending the conductor's lifespan.

[0021] The threaded connection between the end plate and the movable shaft allows the positioning spring to be disassembled and replaced without the need for special tools; the components can be separated simply by rotation. This design significantly reduces the maintenance costs of the equipment. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0024] Figure 2 This is a schematic diagram of the rear view structure of this utility model;

[0025] Figure 3 This is a partial structural diagram of the interface of this utility model;

[0026] Figure 4 This is a schematic diagram of the structure of the present invention with the wire at the interface pulled out.

[0027] Figure 5 This is a partial structural diagram showing the interface of this utility model.

[0028] Figure 6This is a rear view partial structural diagram of the positioning plate, lower baffle, and movable shaft of this utility model.

[0029] Drawing number descriptions: 1. Measuring instrument body; 2. Interface; 21. Wire; 3. Positioning plate; 301. Magnetic block; 31. Anti-torsion sleeve; 311. First protective layer; 32. Lower baffle; 321. Second protective layer; 4. Limiting plate; 5. Movable shaft; 51. End plate; 6. Positioning spring; 7. Connecting rod; 71. Pull ring. Detailed Implementation

[0030] The present invention will now be described in further detail with reference to the accompanying drawings.

[0031] The following description is intended to disclose the present invention so that those skilled in the art can implement it. The preferred embodiments described below are merely examples, and other obvious modifications will be apparent to those skilled in the art. The basic principles of the present invention defined in the following description can be used in other embodiments, modifications, improvements, equivalents, and other technical solutions that do not depart from the spirit and scope of the present invention.

[0032] Those skilled in the art should understand that in the disclosure of this utility model, the terms "longitudinal", "lateral", "up", "down", "left", "right", "front", "rear", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or position based on the orientation or positional relationship shown in the accompanying drawings. They are only for the purpose of simplifying the description of this utility model 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. Therefore, the above terms should not be construed as limitations on this utility model.

[0033] It is understood that the term "a" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of an element can be one, while in another embodiment, the number of the element can be multiple, and the term "a" should not be understood as a limitation on the number. Example

[0034] Please see Figure 1-6 An external oral cavity 3D scanning measuring instrument includes a measuring instrument body 1, an interface 2 on the measuring instrument body 1, a wire 21 inserted into the interface 2, a positioning plate 3 on the outside of the interface 2, an anti-twist sleeve 31 connected to the outer periphery of the front opening of the positioning plate 3, the cable of the wire 21 axially passes through the inside of the positioning plate 3 and out of the outside of the anti-twist sleeve 31, and is constrained to move in a single direction along the groove of the anti-twist sleeve 31, a limit plate 4 is connected above the outer wall of the interface 2, the positioning plate 3 can move up and down relative to the limit plate 4, and forms a constraint on the anti-twist sleeve 31 through the cooperation of the reset structure.

[0035] The oral cavity external 3D scanning measuring instrument of this application is mainly composed of measuring instrument body 1, interface 2, wire 21, positioning plate 3, anti-torsion sleeve 31 and limiting plate 4, etc. The following is a detailed description of its structure and working principle.

[0036] In the overall workflow of the oral cavity external 3D scanning measurement instrument, the main body 1 of the measuring instrument, as the core component, undertakes the key tasks of data acquisition and preliminary processing. Once the connection between the wire 21 and the interface 2 is stable, the high-precision image detection module inside the main body 1 immediately enters its working state. This module utilizes technologies such as structured light projection, laser scanning, or binocular vision to project specific optical patterns or laser beams onto the patient's oral cavity. The optical patterns or laser beams are reflected from the surface of the oral cavity, and the high-resolution image sensor mounted on the main body 1 quickly captures the image information formed by the reflected light. This image information contains complex three-dimensional geometric features of the oral cavity. Through the image processing chip built into the main body 1, algorithms such as triangulation and phase calculation are used to perform depth analysis on the captured images, thereby converting the image information into precise three-dimensional coordinate data.

[0037] Simultaneously, the measuring instrument body 1 performs real-time calibration and optimization of the acquired data based on preset scanning parameters, such as scanning range and resolution. Throughout the scanning process, the measuring instrument body 1 transmits the processed three-dimensional coordinate data at high speed to an external computer via a stable connecting cable 21. This allows the computer to further construct a high-precision 3D model, providing accurate basic data for subsequent dental implant restoration and prosthesis design. Furthermore, the power supply system of the measuring instrument body 1 obtains power through interface 2, ensuring stable operation of each functional module and maintaining the continuity of data acquisition and transmission during long-term scanning operations.

[0038] An anti-torsion sleeve 31 is connected to the outer periphery of the front opening of the positioning plate 3. The anti-torsion sleeve 31 has a semi-open design, and the curvature of its bottom inner wall is adapted to the exit path of the wire 21 cable, ensuring that when the wire 21 cable passes axially from the inside of the positioning plate 3 to the outside of the anti-torsion sleeve 31, it can be stably exited along the preset exit path. The inner wall of the guide groove of the anti-torsion sleeve 31 is embedded with a first protective layer 311. The first protective layer 311 is made of rubber and contacts the outer surface of the wire 21 cable, which can protect the wire 21 cable and reduce the friction between the cable and the anti-torsion sleeve 31.

[0039] The positioning plate 3 is bent inward in the lower direction and has a lower baffle 32. The positioning plate 3 and the lower baffle 32 are integrally formed. The surface of the lower baffle 32 is provided with a second protective layer 321. The lower baffle 32 is located below the insertion head of the wire 21 and the second protective layer 321 contacts and cooperates with the bottom of the insertion head of the wire 21. It can work together with the limiting plate 4 to restrict the upper and lower ends of the exposed part of the wire 21 plug and further prevent loosening caused by pulling or other situations.

[0040] A limiting plate 4 is connected to the upper part of the outer wall of interface 2, and the positioning plate 3 can move up and down relative to the limiting plate 4. The reset structure includes movable shafts 5 symmetrically connected to both sides of the lower baffle 32. One end of the movable shaft 5 can slide through the corresponding hole on the limiting plate 4, and the other end of the movable shaft 5 is provided with an end plate 51. The end plate 51 is threadedly connected to the corresponding threaded hole at the top of the movable shaft 5 by a screw, which facilitates the subsequent replacement of the positioning spring 6 and the disassembly and replacement of the entire structure. The positioning spring 6 is sleeved on the movable shaft 5. One end of the positioning spring 6 abuts against the end plate 51 and the other end abuts against the limiting plate 4. The setting of the movable shaft 5 improves the stability of the positioning plate 3 during the overall movement process. The bottom ends of the movable shafts 5 on both sides pass through the lower baffle 32, and the bottom ends of the movable shafts 5 on both sides are horizontally connected by a connecting rod 7. The middle part of the connecting rod 7 is integrally formed with a pull ring 71, which improves the convenience of operation.

[0041] Magnetic blocks 301 are connected to both sides of the top surface of the positioning plate 3. The magnetic blocks 301 and the corresponding magnetic or ferromagnetic materials on the bottom surface of the limiting plate 4 generate a magnetic attraction. When the positioning plate 3 is close to the limiting plate 4, it can further guide and restrict the connection.

[0042] The positioning plate 3 is located at the front end of the wire 21 insertion head. The positioning plate 3, the lower baffle 32 and the limiting plate 4 form a space around each other, which restricts the wire 21 insertion head to the outer peripheral wall of the interface 2 insertion port, further improving the stability of the wire 21 plug after it is inserted into the interface 2.

[0043] Working principle

[0044] When using this external oral 3D scanning and measuring instrument, when it is necessary to insert the insertion head of the lead wire 21 into the interface 2, the doctor pulls the pull ring 71. Under the action of the force, the connecting rod 7 pulls the movable shaft 5 connected to it downward. Since the movable shaft 5 is fixedly connected to the lower baffle 32, and the lower baffle 32 and the positioning plate 3 are designed as an integral structure, the lower baffle 32, the positioning plate 3, and the anti-torsion sleeve 31 will move together to the end away from the limiting plate 4. At this time, the movable shaft 5 slides in the hole of the limiting plate 4, and the end plate 51 exerts a downward squeezing force on the positioning spring 6. The positioning spring 6 is compressed, thereby exposing the insertion port of the interface 2, and the doctor can stably insert the insertion head of the lead wire 21 into the interface 2.

[0045] Once the insertion head of wire 21 is stably inserted into interface 2, the force applied to the pull ring 71 is stopped. At this time, the squeezing force on the positioning spring 6 disappears, and the positioning spring 6 returns to its original shape due to elastic deformation, generating an upward elastic force that pushes the end plate 51 and the movable shaft 5 upward, thereby causing the positioning plate 3, the lower baffle 32, and the anti-torsion sleeve 31 to move as a whole towards the limiting plate 4. As the positioning plate 3 approaches the limiting plate 4, the magnetic block 301 on the top surface of the positioning plate 3 and the corresponding magnetic or ferromagnetic material on the bottom surface of the limiting plate 4 generate a magnetic attraction, further guiding and restricting the position of the positioning plate 3, so that the anti-torsion sleeve 31 is just fitted over the outside of the wire 21.

[0046] In clinical practice, when doctors need to frequently adjust the angle of the handheld device, the cable of the lead wire 21 will experience non-axial twisting. Since the cable of the lead wire 21 axially exits the anti-twist sleeve 31 from the inside of the positioning plate 3 and is constrained to move in a single direction within the groove of the anti-twist sleeve 31, and the first protective layer 311 on the inner wall of the guide groove of the anti-twist sleeve 31 contacts the outer surface of the cable of the lead wire 21, it can limit the twisting direction of the cable of the lead wire 21 and prevent the formation of periodic shear stress between the connector of the lead wire 21 and the interface 2. The second protective layer 321 on the surface of the lower baffle 32 contacts and engages with the bottom of the lead wire 21 insertion head, and the limiting plate 4 restricts the upward movement of the positioning plate 3. This allows the positioning plate 3, the lower baffle 32, and the limiting plate 4 to collectively restrict the lead wire 21 insertion head on the outer peripheral wall of the insertion port of the interface 2, restricting the upper and lower ends of the exposed part of the lead wire 21 connector. This further reduces wear on the connection part of the lead wire 21 caused by cable twisting, thereby improving the reliability of the interface 2 and ensuring the normal use of the device and the stability of data transmission.

[0047] Furthermore, when the plug of wire 21 is not fully inserted into the interface 2, the anti-twist sleeve 31 and the positioning plate 3 can also restrain the wire 21 cable, preventing wear at the connection between the wire 21 cable and the plug due to twisting. When it is necessary to replace the positioning spring 6 in the reset structure or to disassemble the entire structure, simply separate the end plate 51 from the movable shaft 5 using the screw to detach the positioning spring 6, and at the same time pull the movable shaft 5 out of the hole of the limiting plate 4, making the operation convenient and quick.

[0048] Those skilled in the art should understand that the embodiments of the present invention described above and shown in the accompanying drawings are merely examples and do not limit the present invention. The purpose of the present invention has been fully and effectively achieved. The functions and structural principles of the present invention have been shown and explained in the embodiments. Without departing from the stated principles, the implementation of the present invention may have any variations or modifications.

Claims

1. A 3D scanning and measuring instrument for external oral cavity, characterized in that, The instrument includes a measuring instrument body (1), which has an interface (2) and a wire (21) inserted into the interface (2). A positioning plate (3) is provided on the outside of the interface (2). An anti-torsion sleeve (31) is connected to the outer periphery of the front opening of the positioning plate (3). The cable of the wire (21) passes through the inside of the positioning plate (3) axially out of the outside of the anti-torsion sleeve (31) and is constrained to move in a single direction along the groove of the anti-torsion sleeve (31). A limit plate (4) is connected above the outer wall of the interface (2). The positioning plate (3) can move up and down relative to the limit plate (4) and form a constraint on the anti-torsion sleeve (31) through the cooperation of the reset structure.

2. The oral cavity external 3D scanning measurement instrument according to claim 1, characterized in that: The positioning plate (3) is bent inward in the lower direction and has a lower baffle (32). The surface of the lower baffle (32) is provided with a second protective layer (321). The lower baffle (32) is located below the insertion head of the wire (21) and the second protective layer (321) is in contact with the bottom of the insertion head of the wire (21).

3. The oral cavity external 3D scanning measurement instrument according to claim 2, characterized in that: The reset structure includes movable shafts (5) symmetrically connected to both sides of the lower baffle (32). One end of the movable shaft (5) can slide through the corresponding hole on the limiting plate (4). The other end of the movable shaft (5) is provided with an end plate (51). A positioning spring (6) is sleeved on the movable shaft (5). One end of the positioning spring (6) abuts against the end plate (51) and the other end abuts against the limiting plate (4).

4. The oral cavity external 3D scanning measurement instrument according to claim 1, characterized in that: The anti-torsion sleeve (31) is a semi-open design, and the curvature of its bottom inner wall is adapted to the cable outlet path of the conductor (21).

5. The oral cavity external 3D scanning measurement instrument according to claim 1, characterized in that: The guide groove of the anti-torsion sleeve (31) is embedded with a first protective layer (311), which is made of rubber and is in contact with the outer surface of the wire (21) cable.

6. The oral cavity external 3D scanning measurement instrument according to claim 3, characterized in that: The end plate (51) is threadedly connected to the threaded hole at the top of the movable shaft (5) via a screw.

7. The oral cavity external 3D scanning measurement instrument according to claim 2, characterized in that: The positioning plate (3) and the lower baffle (32) are integrally formed. The positioning plate (3) is located at the front end of the wire (21) insertion head. The positioning plate (3), the lower baffle (32) and the limiting plate (4) surround each other to form a space, restricting the wire (21) insertion head to the outer peripheral wall of the interface (2) insertion port.

8. The oral cavity external 3D scanning measurement instrument according to claim 1, characterized in that: The top surface of the positioning plate (3) is connected to two sides of magnetic blocks (301), and the magnetic blocks (301) and the magnetic or ferromagnetic materials set at corresponding positions on the bottom surface of the limiting plate (4) generate a magnetic attraction.

9. The oral cavity external 3D scanning measurement instrument according to claim 3, characterized in that: The bottom ends of the movable shafts (5) on both sides pass through the lower baffle (32), and the bottom ends of the movable shafts (5) on both sides are horizontally connected by a connecting rod (7). A pull ring (71) is integrally formed in the middle of the connecting rod (7).

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