Optical positioning instrument
By dividing the filter unit into a large filter ring and a small filter in an optical positioner, and using the sealing structure of the opaque isolation ring piece, the LED light source light on the lamp board is directly refracted into the lens. Problem, improving positioning accuracy.
Patent Information
- Application Number
- CN202420725134.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-09
- Publication Date
- 2024-12-27
- Estimated Expiration
- 2034-04-09
AI Technical Summary
In existing optical positioners, the light emitted by the LED light source on the lamp plate is directly refracted into the lens through the filter unit, affecting the positioning accuracy.
An optical positioner including a lamp plate, a lens, a lampshade and an opaque isolation ring piece is designed. The filter unit is divided into a large filter ring and a small filter. The isolation ring piece is sealed outside the lens mounting hole. The LED light source is located on the periphery of the isolation ring, and the large filter ring and the small filter are isolated by an annular projection to prevent the light emitted by the light source from being directly refracted into the lens.
It effectively prevents the light emitted by the LED light source on the lamp board from being refracted directly through the filter unit to the lens, thereby improving the tracking and positioning accuracy of the optical positioner.
Smart Images
Figure CN222237807U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of optical positioning, in particular to an optical positioning instrument. Background Art
[0002] As one of the core components of the surgical robot, the optical locator is the eye of the surgical robot. As an optical device, it has very high requirements for light. Its working principle is: the near-infrared light emitted by its own LED light source is irradiated on the marker, and then the lens receives the light returned by the marker, so as to achieve the purpose of tracking the position of the marker and realize the surgical positioning function. The optical locator can be applied not only to the medical field, but also to the industrial field, such as robot welding, aerospace docking and other fields.
[0003] At present, in order to prevent interference from light sources other than near-infrared light, a filter unit is usually added to the front end of the lens in order to filter out light sources other than near-infrared light. However, the existing filter unit is usually a whole filter, and the light board of the optical locator is connected to the LED light source and the lens arranged in a ring shape, the lens is arranged in the inner ring of the LED light source, and the filter is connected to the end of the lampshade facing away from the light board. In this way, when the existing optical locator is working, part of the light emitted by the LED light source on the light board will be emitted through the filter to the marker outside the filter, and the other part will be directly refracted by the filter itself to the inside of the lens, resulting in that the light received by the lens may be the light returned by the marker, or it may be the light emitted by the LED light source on the light board directly refracted through the filter itself to the inside of the lens, thereby affecting the tracking and positioning accuracy of the optical locator.
[0004] Therefore, how to prevent the light emitted by the LED light source on the light board of the optical locator from being directly refracted by the filter unit itself into the lens is a technical problem that urgently needs to be solved. Utility Model Content
[0005] One of the purposes of the utility model is to provide an optical aligner, aiming to solve the problem that the light emitted by the LED light source on the light board of the existing optical aligner is directly refracted by the filter unit itself into the interior of the lens.
[0006] In order to achieve the above-mentioned utility model object, the utility model provides an optical locator, comprising:
[0007] A light board, wherein a lens mounting hole is formed on the light board, and a ring-shaped LED light source is formed on one surface of the light board, and the LED light source is located at the periphery of the lens mounting hole;
[0008] A lens, disposed in the lens mounting hole;
[0009] A lampshade, a first end of which is connected to the lamp board and the lampshade is arranged around the outer ring of the annular LED light source;
[0010] An opaque isolation ring, a first end of which is sealed and connected to the light board, and the isolation ring is arranged outside the lens mounting hole and inside the inner ring of the annular LED light source;
[0011] A light filtering unit is sealed and connected to the second end of the isolation ring, and is fixedly connected to the second end of the lampshade.
[0012] Furthermore, the isolation ring component includes an isolation ring and an annular protrusion, the first end of the isolation ring is sealed and connected to the lamp board, the isolation ring is arranged outside the lens mounting hole and is located within the inner ring of the annular LED light source, the annular protrusion is arranged at the second end of the isolation ring, and the annular protrusion is located between the outer ring and the inner ring of the isolation ring; the large filter ring is connected to the second end of the lampshade, and the inner ring of the large filter ring is tightly connected to the outer ring of the annular protrusion.
[0013] Furthermore, the filter unit comprises a small filter, the small filter is arranged in the inner ring of the large filter ring, and the small filter is tightly connected to the inner ring of the annular protrusion.
[0014] The light-proof isolation ring further comprises an inner ring wall of the large filter ring that is tightly fitted with an outer ring wall of the annular protrusion.
[0015] Furthermore, the outer peripheral wall of the small filter is tightly fitted with the inner ring wall of the annular protrusion; the inner ring wall of the large filter ring is tightly fitted with the outer ring wall of the annular protrusion.
[0016] Furthermore, the step surface formed between the outer ring of the annular protrusion and the outer ring of the isolation ring is a first step surface, and the position of the large filter ring on the surface facing the light board corresponding to the first step surface is placed on the first step surface.
[0017] Furthermore, the step surface formed between the inner ring of the annular protrusion and the inner ring of the isolation ring is a second step surface, and the small filter is placed on the second step surface at a position corresponding to the second step surface on the surface of the light board facing the light board.
[0018] Furthermore, the first step surface is lower than the second step surface.
[0019] Furthermore, the optical locator of the utility model also includes a sealing ring arranged between the large filter ring and the lampshade, which is used to seal the gap between the large filter ring and the lampshade.
[0020] Furthermore, a sealing ring installation groove for installing the sealing ring is provided along the circumference of the end surface of the lampshade facing away from the lamp board.
[0021] Furthermore, a plurality of undercut structures are provided on the outer wall of the lampshade along its circumference, so as to enable the lampshade to be buckled to the lamp board.
[0022] Furthermore, a plurality of positioning posts are arranged along the circumference of the surface of the isolation ring facing the light board, a plurality of positioning holes are opened on the light board and are located outside the lens mounting hole, and the plurality of positioning holes are matched with the plurality of positioning posts in a one-to-one correspondence.
[0023] Compared with the prior art, the optical locator of the utility model has the following beneficial effects:
[0024] The optical locator of the utility model divides the filter unit into a large filter ring and a small filter. Since the opaque isolation ring is sealed and surrounded at the periphery of the lens mounting hole, and the lens is fixed in the lens mounting hole, the LED light source is located at the periphery of the isolation ring, and the large filter ring and the small filter are isolated by the opaque annular protrusion of the isolation ring, the light emitted by the LED light source on the lamp board cannot be directly refracted to the inside of the lens through the large filter ring, thereby solving the problem of the existing optical locator that the light emitted by the LED light source on the lamp board is refracted to the inside of the lens through the direct filter unit, which affects the tracking and positioning accuracy of the optical locator. BRIEF DESCRIPTION OF THE DRAWINGS
[0025] Figure 1 This is an exploded view of the optical locator of the utility model;
[0026] Figure 2 This is a schematic diagram of the structure of the optical locator of the utility model;
[0027] Figure 3 This is a schematic diagram of the structure of the optical locator of the utility model from another angle;
[0028] Figure 4 for Figure 3 Sectional view at AA in the middle;
[0029] Figure 5 It is a schematic structural diagram of an isolation ring member according to an embodiment of the utility model.
[0030] Numbers in the attached drawings:
[0031] 1. Light board; 10. LED light source; 11. Lens mounting hole; 12. Positioning hole; 2. Lens; 3. Lampshade; 30. Inverted structure; 31. Sealing ring mounting groove; 4. Isolation ring; 40. Isolation ring; 401. First step surface; 402. Second step surface; 403. Positioning column; 41. Annular protrusion; 5. Large filter ring; 50. Small filter; 6. Sealing ring. DETAILED DESCRIPTION
[0032] It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.
[0033] In the description of the present invention, it should be understood that the terms "length", "up", "down", "front", "back", "top", "bottom", etc. indicating the orientation or position relationship are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.
[0034] In the description of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", and "set" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.
[0035] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.
[0036] Please refer to Figure 1-Figure 5The utility model proposes an optical positioning instrument, comprising a light board 1, a lens 2, a lampshade 3, a filter unit and an opaque isolation ring 4. A lens mounting hole 11 is provided at the center of the light board 1, a ring-shaped LED light source 10 is provided on one surface of the light board 1, and the ring-shaped LED light source 10 is located at the periphery of the lens mounting hole 11; the lens 2 is arranged in the lens mounting hole 11, and the lens 2 and the lens mounting hole 11 are coaxially arranged; the first end of the lampshade 3 is connected to the light board 1, and the lampshade 3 is arranged around the outer ring of the ring-shaped LED light source 10; the first end of the isolation ring 4 is sealed and connected to the light board 1, and the isolation ring 4 is arranged outside the lens mounting hole 11 and is located in the inner ring of the ring-shaped LED light source 10; the filter unit is sealed and connected to the second end of the isolation ring 4, and the filter unit is connected and fixed to the second end of the lampshade 3. It can be seen from this that under the light isolation effect of the opaque isolation ring 4, the light emitted by the LED light source 10 on the light board 1 cannot be directly refracted through the filter unit to the inside of the lens 2, thereby solving the problem of the existing optical locator affecting the tracking and positioning accuracy of the optical locator due to the light emitted by the LED light source 10 on the light board 1 being refracted directly through the filter unit to the inside of the lens 2.
[0037] In one embodiment, the isolation ring component 4 includes an isolation ring 40 and an annular protrusion 41. The isolation ring 40 is located between the inner ring of the annular LED light source 10 and the lens mounting hole 11. That is, the isolation ring 40 is arranged around the periphery of the lens mounting hole 11, and the LED light source 10 is located around the periphery of the isolation ring 40. The first end of the isolation ring 40 is sealed and connected to the lamp board 1, and the second end of the isolation ring 40 is provided with an annular protrusion 41 located between the outer ring and the inner ring of the isolation ring 40, and the annular protrusion 41 is integrally connected to the isolation ring 40; the lens 2 is coaxially installed and fixed in the lens mounting hole 11, one end of the lens 2 is located in the lens mounting hole 11, the other end of the lens 2 passes through the lens mounting hole 11, and the end of the lens 2 in the lens mounting hole 11 is located in the inner ring of the isolation ring 40; the lampshade 3 is surrounded by the isolation ring 40 and the annular LED light source 10; the filter unit includes a large filter ring 5 and a small filter 50, the outer ring of the large filter ring 5 is connected to the end of the lampshade 3 facing away from the lamp board 1, the inner ring of the large filter ring 5 is tightly connected to the outer ring of the annular protrusion 41, and the small filter 50 is tightly connected to the inner ring of the annular protrusion 41.
[0038] As can be seen from the above, the optical locator of the present application divides the filter unit into a large filter ring 5 and a small filter 50. Since the opaque isolation ring 40 is sealed around the periphery of the lens mounting hole 11, and the lens 2 is installed and fixed in the lens mounting hole 11, and the LED light source 10 is located at the periphery of the isolation ring 40, the large filter ring 5 and the small filter 50 are isolated by the opaque annular protrusion 41 of the isolation ring 40. Therefore, the light emitted by the LED light source 10 on the light board 1 cannot be directly refracted through the large filter ring 5 to the inside of the lens 2, thereby solving the problem of the existing optical locator that the light emitted by the LED light source 10 on the light board 1 is refracted into the inside of the lens 2 through the direct filter unit, which affects the tracking and positioning accuracy of the optical locator. Those skilled in the art can therefore appreciate that the present embodiment makes it possible for the isolation ring 4 to have a better light-isolating effect by dividing the filter unit into a large filter ring 5 and a small filter 50, and making the large filter ring 5 and the small filter 50 tightly connected to the outer ring and the inner ring of the annular protrusion 41 of the isolation ring 4, respectively.
[0039] It should be noted that the opaque isolation ring 4 is a black opaque plastic part, and the black opaque isolation ring 4 has the function of absorbing light. In one embodiment, the inner ring wall of the large filter ring 5 is tightly fitted with the outer ring wall of the annular protrusion 41, so that the inner ring of the large filter ring 5 is tightly connected with the outer ring of the annular protrusion 41, and the light emitted by the LED light source 10 is prevented from entering the inner ring of the isolation ring 40 through the gap between the inner ring wall of the large filter ring 5 and the outer ring wall of the annular protrusion 41. Similarly, the outer peripheral wall of the small filter 50 is tightly fitted with the inner ring wall of the annular protrusion 41, so that the small filter 50 is tightly connected with the inner ring of the annular protrusion 41, and the light emitted by the LED light source 10 is prevented from entering the inner ring of the isolation ring 40 through the gap between the small filter 50 and the inner ring wall of the annular protrusion 41.
[0040] It should be noted that sealant may be applied between the inner ring wall of the large filter ring 5 and the outer ring wall of the annular protrusion 41 ; sealant may also be applied between the small filter 50 and the inner ring of the annular protrusion 41 .
[0041] In one embodiment, the step surface formed between the outer ring of the annular protrusion 41 and the outer ring of the isolation ring 40 is the first step surface 401, and the position corresponding to the first step surface 401 on the surface of the large filter ring 5 facing the light board 1 is placed on the first step surface 401. It can be seen that the first step surface 401 supports the large filter ring 5, which is conducive to the connection and fixation of the large filter ring 5 and the outer ring of the annular protrusion 41.
[0042] In one embodiment, the step surface formed between the inner ring of the annular protrusion 41 and the inner ring of the isolation ring 40 is the second step surface 402, and the position corresponding to the second step surface 402 on the surface of the small filter 50 facing the light board 1 is placed on the second step surface 402. It can be seen that the second step surface 402 supports the small filter 50, which is conducive to the connection and fixation of the small filter 50 and the inner ring of the annular protrusion 41.
[0043] In one embodiment, the first step surface 401 is lower than the second step surface 402 , which can further prevent the light emitted by the LED light source 10 from directly entering the inner ring of the isolation ring 40 through the gap between the inner ring of the large filter ring 5 and the outer ring of the annular protrusion 41 from the position of the large filter ring 5.
[0044] In one embodiment, the optical locator of the utility model further includes a sealing ring 6 disposed between the large filter ring 5 and the lampshade 3, and the sealing ring 6 is used to seal the gap between the large filter ring 5 and the lampshade 3 to prevent dust outside the lampshade 3 from entering the interior of the optical locator through the gap between the large filter ring 5 and the lampshade 3. Of course, in order to facilitate the installation of the sealing ring 6, a sealing ring installation groove 31 for installing the sealing ring 6 is provided along its circumference on the end surface of the lampshade 3 facing away from the light board 1. That is, the sealing ring 6 and the sealing ring installation groove 31 are tightly matched, so that the sealing ring 6 is clamped in the sealing ring installation groove 31, and the large filter ring 5 and the end surface of the lampshade 3 facing away from the light board 1 are tightly fitted. The tight fit between the large filter ring 5 and the lampshade 3 can be connected and fixed by means of a sealant, which is not limited here.
[0045] In one embodiment, a plurality of positioning posts 403 are arranged along the circumference of the surface of the isolation ring 40 facing the light board 1, and a plurality of positioning holes 12 are opened on the light board 1 and are located outside the lens mounting hole 11. The plurality of positioning holes 12 are matched with the plurality of positioning posts 403 in a one-to-one correspondence, so that the connection between the isolation ring 40 and the light board 1 can be facilitated. Of course, sealant can also be applied at the connection position between the isolation ring 40 and the light board 1 to achieve sealing between the isolation ring 40 and the light board 1.
[0046] In one embodiment, a plurality of inverted structures 30 are disposed on the outer wall of the lampshade 3 along the circumference thereof, and the inverted structures 30 are used to buckle the lampshade 3 to the lamp board 1 , thereby facilitating the connection between the lampshade 3 and the lamp board 1 .
[0047] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.
Claims
1. An optical locator, characterized in that: include: A light board, wherein a lens mounting hole is formed on the light board, and a ring-shaped LED light source is provided on one surface of the light board, and the LED light source is located at the periphery of the lens mounting hole; A lens, disposed in the lens mounting hole; A lampshade, a first end of which is connected to the lamp board and the lampshade is arranged around the outer ring of the annular LED light source; An opaque isolation ring, a first end of which is sealed and connected to the light board, and the isolation ring is arranged outside the lens mounting hole and inside the inner ring of the annular LED light source; A light filtering unit is sealed and connected to the second end of the isolation ring, and is fixedly connected to the second end of the lampshade.
2. The optical locator according to claim 1, characterized in that: The isolation ring component includes an isolation ring and an annular protrusion, the first end of the isolation ring is sealed and connected to the lamp board, the isolation ring is arranged outside the lens mounting hole and is located inside the inner ring of the annular LED light source, the annular protrusion is arranged at the second end of the isolation ring, and the annular protrusion is located between the outer ring and the inner ring of the isolation ring; the filter unit includes a large filter ring, the large filter ring is connected to the second end of the lampshade, and the inner ring of the large filter ring is tightly connected to the outer ring of the annular protrusion.
3. The optical locator according to claim 2, characterized in that: The filter unit further comprises a small filter, which is arranged in the inner ring of the large filter ring, and the small filter is tightly connected to the inner ring of the annular protrusion.
4. The optical locator according to claim 3, characterized in that: The outer peripheral wall of the small filter is tightly fitted with the inner ring wall of the annular protrusion; the inner ring wall of the large filter ring is tightly fitted with the outer ring wall of the annular protrusion.
5. The optical locator according to claim 3, characterized in that: The step surface formed between the outer ring of the annular protrusion and the outer ring of the isolation ring is a first step surface, and the position corresponding to the first step surface on the surface of the large filter ring facing the light board is placed on the first step surface.
6. The optical locator according to claim 5, characterized in that: The step surface formed between the inner ring of the annular protrusion and the inner ring of the isolation ring is a second step surface, and the position of the small filter corresponding to the second step surface on the surface of the light board facing the light board is placed on the second step surface.
7. The optical locator according to claim 6, characterized in that: The first step surface is lower than the second step surface.
8. The optical locator according to claim 2, characterized in that: It also includes a sealing ring arranged between the large filter ring and the lampshade, which is used to seal the gap between the large filter ring and the lampshade.
9. The optical locator according to claim 8, characterized in that: A sealing ring installation groove for installing the sealing ring is provided along the circumference of the end surface of the lampshade facing away from the lamp board.
10. The optical locator according to claim 1, characterized in that: The outer wall of the lampshade is provided with a plurality of inverted buckle structures arranged along the circumference thereof, which are used to buckle the lampshade to the lamp board.