Intraoral scanning lens fixing structure and intraoral scanning equipment

Abstract

This utility model relates to the field of medical device technology, and in particular to an intraoral scanning lens fixing structure and an intraoral scanning device. The intraoral scanning lens fixing structure includes: an optical engine housing with an installation channel and a fixing hole, the installation channel communicating with the fixing hole; a lens module installed in the installation channel; the projections of the lens module installed in the installation channel and the fixing hole on a plane perpendicular to the depth direction of the fixing hole at least partially overlap; a press-fitting component installed in the fixing hole, with the side of the press-fitting component facing the installation channel abutting against the outer wall of the lens module. This utility model enables the lens module to be fixed in the installation channel. During installation, the position of the lens module in the installation channel can be adjusted to achieve adjustment of parameters such as focal length, reducing errors. This eliminates the need for a high-precision housing for positioning and compensates for errors during lens module manufacturing, improving imaging accuracy and thus meeting the requirements of intraoral scanning devices.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, and in particular to an intraoral scanning lens fixing structure and an intraoral scanning device. Background Technology

[0002] A digital dental impression system, or intraoral scanner for short, is a device that digitally scans and acquires three-dimensional digital models of teeth within the oral cavity. It uses optical methods to acquire tooth data and convert it into electronic data. The system includes an optical engine, a housing, and a scanning head. The optical engine houses various lenses and other components. Because the installation of these lenses and other components requires high precision and needs to be adapted to specific focal lengths, the requirements for installation accuracy are extremely stringent. To achieve this high precision, a high-precision optical engine housing is typically used to limit the movement of lenses and other components. However, most components introduce errors during assembly. The accumulation of these errors can easily lead to variations in parameters such as focal length, ultimately resulting in errors in the imaging effect and affecting the imaging accuracy, thus failing to meet the usage requirements of a digital dental impression system. Utility Model Content

[0003] In view of this, the purpose of this application is to provide an intraoral scanning lens fixing structure and an intraoral scanning device to solve the problem that the existing intraoral scanning assembly method of using the optical engine housing to limit the lens and lens is prone to error accumulation, which can easily lead to differences in parameters such as focal length, ultimately resulting in errors in the imaging effect, affecting the imaging accuracy, and failing to meet the need to obtain a three-dimensional digital model of teeth in the oral cavity.

[0004] The first aspect of this utility model provides an aperture lens fixing structure, comprising: The optical engine housing has a mounting channel and a fixing hole communicating with the mounting channel; A lens module is installed in the mounting channel; the projections of the lens module installed in the mounting channel and the mounting hole on a plane perpendicular to the depth direction of the mounting hole at least partially overlap. A press-fit component is installed in the fixing hole, and the side of the press-fit component facing the mounting channel can abut against the outer wall of the lens module.

[0005] Preferably, the optical engine housing has a first outer wall and a second outer wall that are connected to each other and set at an angle, the mounting channel is opened on the first outer wall, and the fixing hole is opened on the second outer wall.

[0006] Preferably, the circumferential edge of the press-fit component has the same shape as the fixing hole; And / or, the pressing component has a clamping position on the side facing the mounting channel, the clamping position including two inclined surfaces arranged opposite each other, both of which can abut against the outer wall of the lens module.

[0007] Preferably, the optical engine housing is further provided with an adjustment hole that communicates with the mounting channel; the lens module is provided with an adjustment position corresponding to the adjustment hole.

[0008] Preferably, the adjustment position is formed as a structure that is recessed inward from the outer wall of the lens module; Alternatively, the adjustment position may be formed as a structure that protrudes outward from the outer wall of the lens module.

[0009] Preferably, the press-fit component has a through hole, and the optical engine housing has a threaded hole communicating with the through hole; The scanning lens fixing structure also includes: The fastener includes a shank with threads on its outer wall and a head with circumferential sidewalls protruding from the shank, the shank passing through the through hole and connected to the threaded hole, and the head abutting against the side of the press-fit member opposite to the mounting channel.

[0010] Preferably, the circumferential sidewall of the head is formed as a friction part with an uneven structure. Preferably, the lens module includes multiple lens components, and the mounting channel is provided one-to-one with each lens component and is connected to the fixing hole; The press-fit component is formed into a strip structure, which allows the press-fit component to abut against the outer wall of each lens component.

[0011] Preferably, the mounting channel includes a first segment, a second segment, and a third segment arranged sequentially along its depth direction, wherein the radial dimension of the first segment is less than the radial dimension of the second segment and the radial dimension of the third segment, the lens module extends from the outside of the optical engine housing into the second segment via the third segment, and the radial dimension of the first segment is less than the outer diameter of the lens module. The second aspect of this utility model provides an intraoral scanning device, including the intraoral scanning lens fixing structure of any of the above-mentioned technical solutions.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows: The intraoral scanning lens fixing structure of this utility model includes an optomechanical housing with an installation channel and a fixing hole, the fixing hole connecting to the installation channel; a lens module is installed in the installation channel; the projections of the lens module installed in the installation channel and the fixing hole on a plane perpendicular to the depth direction of the fixing hole at least partially overlap; a press-fitting component is installed in the fixing hole, and the side of the press-fitting component facing the installation channel can abut against the outer wall of the lens module, thus fixing the lens module in the installation channel. During the installation process, the position of the lens module in the installation channel can be adjusted to adjust parameters such as focal length, reducing errors. Therefore, it is not necessary to use a high-precision housing for limiting, and it also compensates for errors in the manufacturing of the lens module, improving imaging accuracy and thus meeting the usage requirements of intraoral scanning equipment.

[0013] Ensure the performance of the intraoral scanning equipment.

[0014] To make the above-mentioned objectives, features and advantages of this application more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0015] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0016] Figure 1 A schematic diagram of the intraoral scanning lens fixing structure provided for an embodiment of this utility model; Figure 2 An exploded view of the aperture lens fixing structure provided in an embodiment of this utility model; Figure 3 A schematic diagram of the press-fit component in the oral scanning lens fixing structure provided in the embodiments of this utility model; Figure 4 A cross-sectional view of the intraoral scanning lens fixing structure provided in an embodiment of this utility model.

[0017] Icons: 10-Optical engine housing; 11-First outer wall; 12-Second outer wall; 100-Mounting channel; 101-First section; 102-Second section; 103-Third section; 111-First channel; 112-Second channel; 13-Fixing hole; 14-Adjustment hole; 20-Lens module; 201-First lens component; 202-Second lens component; 21-Adjustment position; 30-Pressure fitting; 31-Clamping position; 311-Inclined surface; 32-Through hole; 40-Fastener; 41-Rod; 42-Head; 421-Friction part. Detailed Implementation

[0018] The following detailed embodiments are provided to help the reader gain a comprehensive understanding of the methods, apparatus, and / or systems described herein. However, various changes, modifications, and equivalents of the methods, apparatus, and / or systems described herein will be apparent after understanding the disclosure of this application. For example, the order of operations described herein is merely illustrative and is not limited to the order set forth herein; changes that will be apparent after understanding the disclosure of this application are possible, except for operations that must occur in a specific order. Furthermore, for clarity and brevity, descriptions of features known in the art may be omitted.

[0019] The features described herein may be implemented in different forms and should not be construed as being limited to the examples described herein. Rather, the examples described herein have been provided merely to illustrate some of the many feasible ways of implementing the methods, apparatus, and / or systems described herein that will be apparent upon understanding the disclosure of this application.

[0020] Throughout the specification, when an element (such as a layer, region, or substrate) is described as being "on" another element, "connected to" another element, "bonded to" another element, "on" another element, or "covering" another element, it may be directly "on" another element, "connected to" another element, "bonded to" another element, "on" another element, or "covering" another element, or there may be one or more other elements in between. In contrast, when an element is described as being "directly on" another element, "directly connected to" another element, "directly bonded to" another element, "directly on" another element, or "directly covering" another element, there may be no other elements in between.

[0021] As used herein, the term “and / or” includes any one of the relevant items listed and any combination of any two or more items.

[0022] Although terms such as “first,” “second,” and “third” may be used herein to describe individual components, assemblies, regions, layers, or parts, these components, assemblies, regions, layers, or parts are not limited by these terms. Rather, these terms are used only to distinguish one component, assembly, region, layer, or part from another. Therefore, without departing from the teachings of the examples described herein, the first component, assembly, region, layer, or part referred to as the second component, assembly, region, layer, or part may also be referred to as the second component, assembly, region, layer, or part.

[0023] For ease of description, spatial relation terms such as “above,” “upper,” “below,” and “lower” are used herein to describe the relationship between one element and another, as shown in the accompanying drawings. Such spatial relation terms are intended to include not only the orientation depicted in the drawings but also different orientations of the device during use or operation. For example, if the device in the drawings is flipped, an element described as being “above” or “upper” relative to another element will subsequently be “below” or “lower” relative to that other element. Therefore, the term “above” includes both “above” and “below” orientations depending on the spatial orientation of the device. The device may also be positioned in other ways (e.g., rotated 90 degrees or in other orientations), and the spatial relation terms used herein will be interpreted accordingly.

[0024] The terminology used herein is for the purpose of describing various examples only and is not intended to limit this disclosure. Unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. The terms “comprising,” “including,” and “having” enumerate the stated features, quantities, operations, components, elements, and / or combinations thereof, but do not exclude the presence or addition of one or more other features, quantities, operations, components, elements, and / or combinations thereof.

[0025] Variations in the shapes shown in the accompanying drawings may occur due to manufacturing techniques and / or tolerances. Therefore, the examples described herein are not limited to the specific shapes shown in the accompanying drawings, but include changes in shape that may occur during manufacturing.

[0026] The features of the examples described herein can be combined in various ways that will be apparent upon understanding the disclosure of this application. Furthermore, although the examples described herein have a wide variety of constructions, other constructions are possible, as will be apparent upon understanding the disclosure of this application.

[0027] According to the first aspect of this utility model, a lens fixing structure for an aperture scanner includes an optical engine housing 10, a lens module 20, and a press-fit component 30.

[0028] The specific structure of the above-described components of the intraocular lens fixing structure according to this embodiment will be described below.

[0029] In this embodiment, as Figures 1 to 4As shown, the optical engine housing 10 has a mounting channel 100 and a fixing hole 13 communicating with the mounting channel 100; the lens module 20 is installed in the mounting channel 100; the projections of the lens module 20 installed in the mounting channel 100 and the fixing hole 13 on a plane perpendicular to the depth direction of the fixing hole 13 at least partially overlap; the press-fit member 30 is installed in the fixing hole 13, and the side of the press-fit member 30 facing the mounting channel 100 can abut against the outer wall of the lens module 20, so that after the lens module 20 is installed in the mounting channel 100, the position of the lens module 20 in the mounting channel 100 can be seen from the fixing hole 13. For adjustment, it also ensures that after the pressing component 30 abuts against the outer wall of the lens module 20, it can press and fix the lens module 20 in the mounting channel 100, preventing the lens module 20 from rotating circumferentially or moving axially in the mounting channel 100. In this way, the lens module 20 is fixed in the mounting channel 100. During the installation process, the position of the lens module 20 on the mounting channel 100 can be adjusted to adjust parameters such as focal length, reduce errors, and thus eliminate the need to use a high-precision housing for limiting. It also makes up for the errors in the processing of the lens module 20, improves imaging accuracy, and thus meets the usage requirements of intraoral scanning equipment.

[0030] Preferably, the lens module 20 includes multiple lens components, which are spaced apart in a direction perpendicular to the lens module 20 extending into the mounting channel 100. Multiple mounting channels 100 are also provided, each corresponding to one of the lens components, so that each lens component is installed in its corresponding mounting channel 100. All mounting channels 100 communicate with the fixing holes 13. The pressing member 30 is formed as a strip structure, preferably extending along the arrangement direction of the multiple lens components, so that the pressing member 30 can abut against the outer wall of each lens component, thereby ensuring that the pressing member 30 can reliably press and fix all the lens components.

[0031] It should be noted that when there are multiple installation channels 100, the multiple installation channels 100 can be connected to each other, or the multiple installation channels 100 can be set independently and not connected to each other.

[0032] Furthermore, in an alternative implementation, such as Figure 1 and Figure 2As shown, the mounting channel 100 includes a first channel 111 and a second channel 112, both of which are connected to the fixing hole 13. The first channel 111 and the second channel 112 can be set independently or connected to each other. The lens module 20 includes a first lens component 201 mounted on the first channel 111 and a second lens component 202 mounted on the second channel 112. The press-fit component 30 is formed into a strip structure and abuts against the outer walls of the first lens component 201 and the second lens component 202 respectively. Thus, during installation, the positions of the first lens component 201 and the second lens component 202 on the first channel 111 and the second channel 112 can be adjusted to adjust parameters such as focal length. After adjustment, the press-fit component 30 is assembled into the fixing hole 13 and abuts against the outer walls of the first lens component 201 and the second lens component 202 respectively, thereby achieving press-fit fixing of the first lens component 201 and the second lens component 202.

[0033] Specifically, in this embodiment, such as Figure 4 As shown, the mounting channel 100 includes a first segment 101, a second segment 102, and a third segment 103 arranged sequentially along its depth direction. The third segment 103 is positioned relative to the first segment 101 and closer to the outer side of the optical engine housing 10. The lens module 20 extends from the outside of the optical engine housing 10 through the third segment 103 into the second segment 102, such that at least part of the lens module 20 is installed in the second segment 102. In a preferred embodiment, the lens module 20 is completely installed in the second segment 102, and the third segment 103 is left empty, thereby dividing the mounting area of ​​the lens module 20 in the mounting channel 100 to facilitate the determination of whether it is installed in place.

[0034] More specifically, the radial dimension of the first segment 101 is less than the radial dimension of the second segment 102 and the radial dimension of the third segment 103, so that the lens module 20 can pass through the third segment 103 and enter the second segment 102. The radial dimension of the first segment 101 is less than the outer diameter of the lens module 20, so as to play an axial limiting role and prevent the lens module 20 from entering the first segment 101.

[0035] In this embodiment, as Figure 1 and Figure 2 As shown, the optical engine housing 10 has a first outer wall 11 and a second outer wall 12 that are connected to each other and arranged at an angle, that is, the first outer wall 11 and the second outer wall 12 are not arranged on opposite sides of the optical engine housing 10. A mounting channel 100 is formed in the first outer wall 11, and a fixing hole 13 is formed in the second outer wall 12, such that the extending direction of the mounting channel 100 is not parallel to the depth direction of the fixing hole 13, thereby facilitating the observation or adjustment of the position of the lens module 20 in the mounting channel 100 through the fixing hole 13.

[0036] Preferably, the extension direction of the mounting channel 100 is perpendicular to the depth direction of the fixing hole 13.

[0037] Furthermore, in this embodiment, as Figure 1 and Figure 2 As shown, the circumferential edge of the press-fitting component 30 has the same shape as the fixing hole 13, so that the circumferential edge of the press-fitting component 30 is adapted to the hole wall of the fixing hole 13, thereby enabling the hole wall of the fixing hole 13 to limit the press-fitting component 30 and improve the reliability of the press-fitting component 30 in fixing the lens module 20.

[0038] Furthermore, in this embodiment, as Figure 2 and Figure 3 As shown, a clamping position 31 is formed on the side of the press-fit component 30 facing the mounting channel 100. The number of clamping positions 31 in the lens module 20 is the same as the number of lens components and they are set one by one. Specifically, the clamping position 31 is formed as a groove structure on the side of the press-fit component 30 facing the mounting channel 100. It includes two inclined surfaces 311 that are arranged opposite to each other. Both inclined surfaces 311 can abut against the outer wall of the lens module 20, increasing the contact area between the press-fit component 30 and the lens module 20 so that the press-fit component 30 is held on the outer wall of the lens module 20, thereby improving the reliability of the press-fit component 30 in restricting the lens module 20 from circumferential rotation.

[0039] It should be noted that the two inclined surfaces 311 are inclined in opposite directions, and the opening side of the clamping position 31 is formed into a flared structure to ensure that both inclined surfaces 311 can abut against the outer wall of the lens module 20.

[0040] More specifically, the clamping position 31 can be V-shaped or trapezoidal with its upper base at the bottom of the groove and its lower base at the opening side in the cross-section along the depth direction of the fixing hole 13. It should be noted that the length of the upper base of the trapezoid is less than the length of the lower base.

[0041] Furthermore, in this embodiment, the press-fit component 30 has a through hole 32, and the optical engine housing 10 has a threaded hole communicating with the through hole 32, so that after the press-fit component 30 is installed on the fixing hole 13, the through hole 32 and the threaded hole are coaxially arranged; it should be noted that... Figure 1 and Figure 2 The diagram shows a structure with two lens components, and correspondingly, two mounting channels 100 are also provided. Threaded holes can be opened on the optical engine housing 10 at a position between the two mounting channels 100.

[0042] like Figure 1 and Figure 2As shown, the lens fixing structure also includes a fastener 40, which can be a screw or a bolt. Specifically, the fastener 40 includes a rod 41 with threads on its outer wall and a head 42 with its circumferential sidewall protruding from the rod 41. The rod 41 passes through the through hole 32 and connects to the threaded hole, so that the head 42 can abut against the side of the press-fit member 30 facing away from the mounting channel 100. This improves the reliability of the press-fit member 30 in pressing and fixing the lens module 20 onto the mounting channel 100 and prevents the press-fit assembly from falling out of the fixing hole 13.

[0043] Preferably, such as Figure 1 and Figure 2 As shown, the circumferential sidewall of the head 42 is formed as a friction part 421 with a concave-convex structure to facilitate hand-tightening and easy assembly / disassembly. Specifically, the concave-convex structure can be formed by multiple strip-shaped protrusions and multiple strip-shaped grooves alternatingly surrounding the circumferential sidewall of the head 42; in other alternative embodiments, the concave-convex structure can also be formed by an array of multiple protrusions or pits. In a preferred embodiment, such as Figure 1 , Figure 2 and Figure 4 As shown, the optical engine housing 10 is also provided with an adjustment hole 14 that connects to the mounting channel 100; the lens module 20 has an adjustment position 21 corresponding to the adjustment hole 14. An adjustment mechanism can be used to extend from the outside of the optical engine housing 10 into the adjustment hole 14 to operate the adjustment position 21, thereby achieving fine-tuning of the lens module 20. Once the preset parameters are reached, the lens module 20 is then locked in place by the pressure fitting 30. It should be noted that before fine-tuning, the pressure fitting 30 can be loosened to allow the lens module 20 to move or rotate within the mounting channel 100. The adjustment mechanism can be formed as a rod-shaped or needle-shaped structure that can extend into the adjustment hole 14.

[0044] Preferably, the adjustment hole 14 is formed as an elongated hole, and the length direction of the elongated hole is the same as the extension direction of the mounting channel 100.

[0045] Furthermore, in an alternative implementation, such as Figure 4 As shown, the adjustment position 21 is formed as a structure that is recessed inward from the outer wall of the lens module 20. Specifically, the adjustment position 21 can be a groove-shaped or hole-shaped structure, and the adjustment mechanism extends into the groove-shaped or hole-shaped adjustment position 21 through the adjustment hole 14.

[0046] In another alternative embodiment, the adjustment position 21 is formed as a structure that protrudes outward from the outer wall of the lens module 20, such as a bump or protrusion structure. There is a gap between the circumferential sidewall of the adjustment position 21 and the hole wall of the adjustment hole 14 so that the adjustment mechanism can operate the adjustment position 21.

[0047] The intraoral scanning lens fixing structure of this utility model includes an optomechanical housing with an installation channel and a fixing hole, the fixing hole communicating with the installation channel; a lens module is installed in the installation channel; the projections of the lens module installed in the installation channel and the fixing hole on a plane perpendicular to the depth direction of the fixing hole at least partially overlap; a press-fitting component is installed in the fixing hole, and the side of the press-fitting component facing the installation channel can abut against the outer wall of the lens module, thus fixing the lens module in the installation channel. During installation, the position of the lens module in the installation channel can be adjusted to adjust parameters such as focal length, reducing errors. This eliminates the need for a high-precision housing for limiting and compensates for errors during lens module manufacturing, improving imaging accuracy and thus meeting the usage requirements of intraoral scanning equipment.

[0048] The intraoral scanning device provided by this utility model includes the above-mentioned intraoral scanning lens fixing structure, and thus has all the beneficial effects of the intraoral scanning lens fixing structure, which will not be repeated here.

[0049] Finally, it should be noted that the above-described embodiments are merely specific implementations of this application, used to illustrate the technical solutions of this application, and not to limit them. The protection scope of this application is not limited thereto. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that any person skilled in the art can still modify or easily conceive of changes to the technical solutions described in the foregoing embodiments, or make equivalent substitutions for some of the technical features, within the technical scope disclosed in this application. Such modifications, changes, or substitutions 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 this application, and should all be covered within the protection scope of this application. Therefore, the protection scope of this application should be determined by the protection scope of the claims.

Claims

1. A lens fixing structure, characterized in that, include: The optical engine housing has a mounting channel and a fixing hole communicating with the mounting channel; The lens module is installed in the mounting channel; The projections of the lens module and the mounting hole installed in the mounting channel onto a plane perpendicular to the depth direction of the mounting hole at least partially overlap; A press-fit component is installed in the fixing hole, and the side of the press-fit component facing the mounting channel can abut against the outer wall of the lens module.

2. The lens fixing structure according to claim 1, characterized in that, The optical engine housing has a first outer wall and a second outer wall that are connected to each other and set at an angle. The mounting channel is opened on the first outer wall, and the fixing hole is opened on the second outer wall.

3. The lens fixing structure according to claim 1, characterized in that, The circumferential edge of the press-fit component has the same shape as the fixing hole; And / or, the pressing component has a clamping position on the side facing the mounting channel, the clamping position including two inclined surfaces arranged opposite each other, both of which can abut against the outer wall of the lens module.

4. The lens fixing structure according to claim 1, characterized in that, The optical engine housing is also provided with an adjustment hole that connects to the mounting channel; the lens module is provided with an adjustment position that corresponds to the adjustment hole.

5. The lens fixing structure according to claim 4, characterized in that, The adjustment position is formed as a structure that is recessed inward from the outer wall of the lens module; Alternatively, the adjustment position may be formed as a structure that protrudes outward from the outer wall of the lens module.

6. The lens fixing structure according to claim 1, characterized in that, The press-fit component has a through hole, and the optical engine housing has a threaded hole that communicates with the through hole; The scanning lens fixing structure also includes: The fastener includes a shank with threads on its outer wall and a head with circumferential sidewalls protruding from the shank, the shank passing through the through hole and connected to the threaded hole, and the head abutting against the side of the press-fit member opposite to the mounting channel.

7. The lens fixing structure according to claim 6, characterized in that, The circumferential sidewall of the head is formed as a friction part with an uneven structure.

8. The lens fixing structure according to claim 1, characterized in that, The lens module includes multiple lens components, and the mounting channel is provided in a one-to-one correspondence with each lens component and is connected to the fixing hole; The press-fit component is formed into a strip structure, which allows the press-fit component to abut against the outer wall of each lens component.

9. The lens fixing structure according to claim 1, characterized in that, The mounting channel includes a first section, a second section, and a third section arranged sequentially along its depth direction. The radial dimension of the first section is less than the radial dimension of the second section, which is less than the radial dimension of the third section. The lens module extends from the outside of the optical engine housing into the second section via the third section. The radial dimension of the first section is less than the outer diameter of the lens module.

10. An intraoral scanning device, characterized in that, The lens fixing structure includes any one of claims 1 to 9.

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