Focusing structure and focusing method
By engaging the rubber block in the focusing structure with the focus adjustment ring, the problem of increased production costs caused by the diverse shapes of the focus adjustment ring in the existing technology is solved, and the focus adjustment is made more efficient and simplified.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- RECO TECH CHENGDU CO LTD
- Filing Date
- 2023-09-20
- Publication Date
- 2026-05-12
AI Technical Summary
In existing technologies, the lens focal length adjustment ring of optical fingerprint recognition modules has various shapes, which leads to the need for customized design of the ring-shaped buckle, increasing the time and money costs of product production.
The system employs a focusing structure, which includes a focusing ring and a rubber block. The rubber block engages with the focus adjustment ring and forms a protruding part. The focus is adjusted by the deformation of the rubber block, which in turn engages with the focus adjustment ring.
The simplified design of the focus adjustment ring reduces the time and money costs of production and improves production efficiency.
Smart Images
Figure CN117292410B_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of focal length adjustment, and in particular to a device structure and a method for adjusting the focal length of an optical fingerprint recognition module. Background Technology
[0002] The current method for adjusting the focal length of the lens in an optical fingerprint recognition module generally involves first fabricating a ring-shaped latch using industrial plastic polyetheretherketone (PEEK). The shape of the ring-shaped latch is designed according to the shape of the focal length adjustment ring on the lens of the optical fingerprint recognition module. For example, when the focal length adjustment ring has four focal length adjustment petals, there are four grooves between the four petals. The ring-shaped latch includes corresponding notches to accommodate each focal length adjustment petal, and protrusions are designed at each groove between the focal length adjustment petals, allowing each protrusion to insert into its corresponding groove. Therefore, after placing the ring-shaped latch below the focusing ring, the focusing ring can be moved to engage the ring-shaped latch below the focusing ring with the focal length adjustment ring. Subsequently, when the focusing ring is rotated, the ring-shaped latch will drive the focal length adjustment ring to rotate, thereby adjusting the focal length of the lens of the optical fingerprint recognition module.
[0003] However, since there are many different shapes of focal length adjustment rings for current lenses, and the number of focal length adjustment petals also varies, the ring clip needs to be customized to match the focal length adjustment ring shape of different lenses. This increases the time and money costs of designing and manufacturing the ring clip, which in turn increases the time and money costs of the final product. Summary of the Invention
[0004] One objective of this application is to solve the problem in the prior art that the need to customize the design of the corresponding ring buckle according to the shape of the focal length adjustment ring leads to an increase in the time and money costs of product production.
[0005] Based on the purpose of this application, a focusing structure is proposed, including a focusing ring and a rubber block, the rubber block being disposed at the bottom of the focusing ring. The rubber block is used to mate with the focus adjustment ring of the lens of an optical fingerprint recognition module, and forms at least one protrusion that engages with the focus adjustment ring. A through hole is provided on the rubber block, allowing light to pass through and enter the lens of the optical fingerprint recognition module.
[0006] In one embodiment of this application, the focus adjustment ring includes at least one groove, a portion or all of which is located within the orthographic projection range of the rubber block, and the at least one protrusion is located in the at least one groove.
[0007] In one embodiment of this application, the focal length adjustment ring of the optical fingerprint recognition module includes at least one focal length adjustment petal, and the at least one groove is located between the at least one focal length adjustment petal.
[0008] In one embodiment of this application, the focusing ring includes a first ring body, a conical cover, and a second ring body. The first ring body is disposed at the edge of the bottom opening of the conical cover, while the second ring body is disposed at the edge of the top opening of the conical cover. The area of the top opening of the conical cover is larger than the area of the bottom opening. A rubber block is disposed below the first ring body.
[0009] In one embodiment of this application, the first ring body includes a first hollow region, and the second ring body includes a second hollow region. The first hollow region and the second hollow region are correspondingly arranged, and both the first hollow region and the second hollow region are used to allow light to pass through and enter the lens.
[0010] In one embodiment of this application, the through hole of the rubber block is provided corresponding to the first hollow region and the second hollow region.
[0011] Based on one objective of this application, a focusing method is proposed, comprising steps 1, 2, 3, and 4. Step 1 involves providing the focusing structure as described above. Step 2 involves aligning the focal length adjustment ring of the optical fingerprint recognition module's lens towards the rubber block of the focusing structure. Step 3 involves pressing the focusing structure towards the lens, causing the rubber block of the focusing structure to deform during the compression process, forming at least one protrusion that engages with the focal length adjustment ring. Step 4 involves rotating the focusing ring of the focusing structure, causing the rubber block to rotate accordingly, which in turn drives the focal length adjustment ring to rotate, thereby adjusting the focal length of the optical fingerprint recognition module's lens.
[0012] In one embodiment of this application, the focus adjustment ring includes at least one groove, a portion or all of which is located within the orthographic projection range of the rubber block, and the at least one protrusion in step 3 is located in the at least one groove.
[0013] In one embodiment of this application, the focal length adjustment ring in the focal length adjustment method includes at least one focal length adjustment petal, and the at least one groove is located between the at least one focal length adjustment petal.
[0014] In one embodiment of this application, the rubber block of the focusing structure in step 3 deforms during the compression of the lens, and forms at least one protrusion in the at least one groove between the at least one focus adjustment petal, the at least one protrusion engaging with the at least one focus adjustment petal.
[0015] In one embodiment of this application, when the rubber block rotates in step 4, the at least one protrusion of the rubber block drives the at least one focal length adjustment petal to rotate, thereby rotating the focal length adjustment ring to adjust the focal length of the lens.
[0016] In summary, this application can solve the problem in related technologies that require customized design of corresponding ring buckles based on the shape of the focal length adjustment ring, which leads to increased time and money costs in product manufacturing. Attached Figure Description
[0017] Figure 1 This is a schematic diagram of the rubber block of the focusing structure corresponding to the lens of the optical fingerprint recognition module. The focusing structure is represented by a cross-sectional view, while the optical fingerprint recognition module is represented by a side view.
[0018] Figure 2 This is a schematic diagram of the rubber block of the focusing structure squeezing the lens of the optical fingerprint recognition module.
[0019] Figure 3 This is a schematic diagram showing how the rubber block of the focusing structure squeezes the lens of the optical fingerprint recognition module to form a protrusion.
[0020] Figure 4 This is a flowchart illustrating the focusing method of this application.
[0021] Explanation of reference numerals in the attached figures:
[0022] 10: Focusing ring
[0023] 20: Rubber Blocks
[0024] 30: Optical fingerprint recognition module
[0025] 40: Focus adjustment ring
[0026] 50: Platform
[0027] 100: First Ring Body
[0028] 102: Conical Shield
[0029] 104: Second Ring Body
[0030] 200: Protrusion
[0031] 300: Lens
[0032] 400: Focus adjustment petals
[0033] 1000: First hollow area
[0034] 1020: Interior Space
[0035] 1040: Second hollow region
[0036] H: Through hole
[0037] S1~S4: Steps Detailed Implementation
[0038] To enable those skilled in the art to easily understand the contents of this application, the following description, in conjunction with embodiments and accompanying drawings, further illustrates the application. The embodiments are merely illustrative of the technical features of this application, and the content mentioned is not intended to limit the application.
[0039] In the description of this application, it should be noted that the terms "upper" and "lower," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application 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. Therefore, they should not be construed as limitations on this application. In addition, "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.
[0040] Throughout this specification, "an embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment is included in at least one embodiment. Therefore, "an embodiment" as used in various places throughout this specification does not necessarily refer to the same embodiment. Furthermore, a particular feature, structure, or characteristic may be combined in any way in one or more embodiments.
[0041] Please see Figure 1 , Figure 2 , Figure 3 and Figure 4 This application provides a focusing structure, including a focusing ring 10 and a rubber block 20, with the rubber block 20 disposed at the bottom of the focusing ring 10. The rubber block 20 is used to mate with the focal length adjustment ring 40 of the lens 300 of the optical fingerprint recognition module 30, and forms at least one protrusion 200 that engages with the focal length adjustment ring 40. The lens 300 of the optical fingerprint recognition module 30 includes the focal length adjustment ring 40, which can adjust the focal length of the lens 300 of the optical fingerprint recognition module 30 when rotated.
[0042] Please see Figure 1 , Figure 2 and Figure 3 The focal length adjustment ring 40 of the optical fingerprint recognition module 30 includes at least one focal length adjustment petal 400, which engages with at least one protrusion 200.
[0043] Please see Figure 1The focusing ring 10 includes a first ring body 100, a conical cover 102, and a second ring body 104. The first ring body 100 is located at the edge of the bottom opening of the conical cover 102, while the second ring body 104 is located at the edge of the top opening of the conical cover 102. The conical cover 102 is wider at the top and narrower at the bottom, with the area of the top opening being larger than the area of the bottom opening. This structure provides a wider field of view for the lens 300 of the optical fingerprint recognition module 30 compared to a cylindrical structure. The first ring body 100 includes a first hollow region 1000, which refers to the hollow region in the center of the first ring body 100. The second ring body 104 includes a second hollow region 1040, which refers to the hollow region in the center of the second ring body 104. The first hollow region 1000 and the second hollow region 1040 are set accordingly. Both the first hollow region 1000 and the second hollow region 1040 are used to allow light to pass through and enter the lens 300.
[0044] Please see Figure 1 , Figure 2 and Figure 3 The rubber block 20 is positioned below the first ring body 100, thus fixing the rubber block 20 to the first ring body 100. Therefore, when the second ring body 104 rotates, the conical cover 102 fixedly connected to the second ring body 104 will rotate accordingly, the first ring body 100 fixedly connected to the conical cover 102 will also rotate accordingly, and the rubber block 20 fixedly connected to the first ring body 100 will also rotate together. The rubber block 20 can be positioned below the first ring body 100 in different ways, such as by adhesive, snap-on, or interlocking, and this application is not particularly limited. The rubber block 20 is provided with a through hole H, which is used to allow light to pass through and enter the lens 300 of the optical fingerprint recognition module 30.
[0045] Please see Figure 4 This application provides a focusing method, which includes steps S1, S2, S3 and S4, each of which is shown in the following paragraphs.
[0046] Step S1 is to provide the focusing structure as described above in this application.
[0047] Step S2 involves aligning the focal length adjustment ring 40 of the lens 300 of the optical fingerprint recognition module 30 with the rubber block 20 of the focusing structure.
[0048] Step S3 involves pressing the focusing structure toward the lens 300, causing the rubber block 20 of the focusing structure to deform during the pressing of the lens 300, thereby forming at least one protrusion 200 that engages with the focus adjustment ring 40.
[0049] Step S4 involves rotating the focusing ring 10 of the focusing structure, causing the rubber block 20 of the focusing structure to rotate as well. The rubber block 20 then drives the focus adjustment ring 40 to rotate, thereby adjusting the focus of the lens 300 of the optical fingerprint recognition module 30.
[0050] The following provides detailed explanations of each step in the focusing method; please also refer to [the relevant documentation / reference]. Figure 1 , Figure 2 , Figure 3 and Figure 4 .
[0051] In this embodiment, the focusing structure described in step S1 is described. In this embodiment, the focusing ring 10 of the focusing structure includes a first ring 100, a conical cover 102, and a second ring 104. Both the first ring 100 and the second ring 104 are cylindrical rings, therefore the first hollow region 1000 and the second hollow region 1040 are both disc-shaped hollow regions. The axes of the first ring 100 and the second ring 104 are located on the same straight line. The conical cover 102 is hollow, therefore it includes an internal space 1020. The internal space 1020 communicates with the first hollow region 1000 and also communicates with the second hollow region 1040. The above is one possible structural form of the focusing ring 10, but in actual implementation, it is not limited to this. The structural form of the focusing ring 10 can be adjusted according to practical needs, and this application does not impose any particular limitation. In this embodiment, the rubber block 20 of the focusing structure is a cylindrical rubber block 20. The material of the rubber block 20 is ethylene propylene diene monomer (EPDM), but it is not limited to this in actual implementation. It can also be a rubber material such as chloroprene rubber (CR) or polyisoprene rubber. The through hole H of the rubber block 20 is cylindrical. The through hole H of the rubber block 20 is set in the first hollow region 1000 and the second hollow region 1040. Specifically, the axis of the through hole H of the rubber block 20, the axis of the first hollow region 1000, and the axis of the second hollow region 1040 are all located on the same straight line. Therefore, the first hollow region 1000 of the first ring body 100, the internal space 1020 of the cone cover 102, the second hollow region 1040 of the second ring body 104, and the through hole H of the rubber block 20 can form a channel for light to pass through. Thus, the light can pass through the first hollow region 1000 of the first ring body 100, the internal space 1020 of the cone cover 102, the second hollow region 1040 of the second ring body 104, and the through hole H of the rubber block 20 and be directed toward the lens 300, so that the lens 300 of the optical fingerprint recognition module 30 can receive the light and convert it into an electrical signal. The foregoing is merely an example. In actual implementation, the shape of the rubber block 20 and the through hole H on the rubber block 20 can be adjusted according to practical needs. This application does not impose any particular restrictions.
[0052] Step S2 involves aligning the lens 300 of the optical fingerprint recognition module 30 with the through-hole H of the rubber block 20 in the focusing structure. In this embodiment, the lens 300 of the optical fingerprint recognition module 30 can be a charge-coupled device image (CCD) lens or a complementary metal oxide semiconductor (CMOS) lens, etc. In this embodiment, the focus adjustment ring 40 of the lens 300 of the optical fingerprint recognition module 30 includes four focus adjustment petals 400. All four focus adjustment petals 400 are fixedly connected to the focus adjustment ring 40, and each of the four focus adjustment petals 400 is a structure protruding outward from the focus adjustment ring 40. The four focus adjustment petals 400 have the same shape and are evenly distributed on the focus adjustment ring 40. Each focus adjustment petal 400 includes a groove. The above is merely an example; in actual implementation, the number, shape, and distribution of the focus adjustment petals 400 can be adjusted according to practical needs, and this application does not impose any particular limitations. In this embodiment, step S2 specifically involves placing the optical fingerprint recognition module 30 on a platform 50 and adjusting the relative position between the optical fingerprint recognition module 30 and the focusing structure by moving the platform 50 or the focusing structure, so that the lens 300 of the optical fingerprint recognition module 30 faces the rubber block 20 of the focusing structure. Therefore, the area on the lens 300 of the optical fingerprint recognition module 30 that receives light corresponds to the through hole H on the rubber block 20, and the focal length adjustment ring 40 on the lens 300 of the optical fingerprint recognition module 30 corresponds to the rubber block 20. Since each focal length adjustment petal 400 of the focal length adjustment ring 40 includes a groove, a portion of each groove is located within the orthographic projection range of the rubber block 20. However, in actual implementation, it is not limited to this. It can also be that the entire groove between each focal length adjustment petal 400 of the focal length adjustment ring 40 is located within the orthographic projection range of the rubber block 20, etc. In this embodiment, the length of the outermost edge of the focus adjustment petal 40 from the axis of the lens 30 is defined as equal to the length of the outermost edge of the groove perpendicular to the axis of the lens 30. Therefore, in this embodiment, the outermost edges of each focus adjustment petal can be connected to form a virtual circle, which includes the outermost edges of each groove.
[0053] Step S3 involves pressing the focusing structure towards the lens 300, causing the rubber block 20 of the focusing structure to deform during the compression of the lens 300, thus forming at least one protrusion 200 that engages with the focus adjustment ring 40. Based on the elasticity of the rubber block 20 and the fact that a portion of each groove is located within the orthographic projection range of the rubber block 20, during the compression of the lens 300 in step S3, a portion of the rubber block 20 will contact the focus adjustment ring 40, while another portion will deform, forming protrusions 200 along each groove. In this embodiment, since there are four focus adjustment petals 400, there are four grooves between the four focus adjustment petals 400, and the rubber block 20 forms protrusions 200 corresponding to each groove, thus forming a total of four protrusions 200. Because the four protrusions 200 are distributed in each groove, each protrusion 200 engages with the adjacent focus adjustment petal 400. The foregoing is an example of this embodiment. In addition, if the entirety of each groove is located within the orthographic projection range of the rubber block 20, then during the compression process, in addition to forming a protrusion 200 that engages with the focus adjustment ring 40, the rubber block 20 will also cover the outer edge of the focus adjustment ring 400. This is also one of the forms of this application.
[0054] Step S4 involves rotating the focusing ring 10 of the focusing structure, causing the rubber block 20 of the focusing structure to rotate as well. The rubber block 20 then drives the focus adjustment ring 40 to rotate, thereby adjusting the focus of the lens 300 of the optical fingerprint recognition module 30. In this embodiment, the focusing ring 10 can be rotated manually or by using a robotic arm to rotate the second ring 104. The rotation of the second ring 104 will cause the conical cover 102 and the first ring 100 to rotate together. The rubber block 20, which is fixedly connected to the first ring 100, will also rotate along with the rotation of the first ring 100. Since the rubber block 20 engages with the four focus adjustment petals 400 on the focus adjustment ring 40 through the four protrusions 200, when the rubber block 20 rotates, it can drive the four focus adjustment petals 400 to rotate through the four protrusions 200, thereby rotating the focus adjustment ring 40 and adjusting the focus of the lens 300.
[0055] Furthermore, although the foregoing description of this application uses a focal length adjustment ring 40 including at least one focal length adjustment petal 400 as an example, the actual implementation is not limited to this. The focal length adjustment ring 40 may also be in the form of not having a focal length adjustment petal 400, and at least one groove may be directly provided on the focal length adjustment ring 40, with the opening of the groove facing the rubber block 20. Therefore, when the rubber block 20 is pressed towards the lens 300, the rubber block 20 will form a corresponding protrusion 200 in the groove of the focal length adjustment ring 40 and engage with the focal length adjustment ring 40. Therefore, when the rubber block 20 rotates, the focal length adjustment ring 40 will also rotate accordingly, achieving the purpose of adjusting the focal length adjustment ring 40.
[0056] In summary, this application can solve the problem in related technologies that require customized design of corresponding ring buckles based on the shape of the focal length adjustment ring, which leads to increased time and money costs in product manufacturing.
Claims
1. A focusing structure, characterized in that, The focusing structure includes a focusing ring and a rubber block, the rubber block being disposed at the bottom of the focusing ring; wherein the rubber block is used to mate with the focus adjustment ring of the lens of the optical fingerprint recognition module and to be pressed towards the lens, causing the rubber block to deform during the pressing of the lens, thereby forming at least one protrusion that engages with the focus adjustment ring; wherein the rubber block is provided with a through hole for allowing light to pass through and enter the lens of the optical fingerprint recognition module; the focus adjustment ring includes at least one groove, a portion or all of each groove being located within the orthographic projection range of the rubber block, and the at least one protrusion being located within the at least one groove.
2. The focusing structure according to claim 1, characterized in that, The focal length adjustment ring of the optical fingerprint recognition module includes at least one focal length adjustment petal, and the at least one groove is located between the at least one focal length adjustment petal.
3. The focusing structure according to claim 1, characterized in that, The focusing ring includes a first ring body, a conical cover, and a second ring body. The first ring body is disposed at the edge of the bottom opening of the conical cover, while the second ring body is disposed at the edge of the top opening of the conical cover. The area of the top opening of the conical cover is larger than the area of the bottom opening. The rubber block is disposed below the first ring body.
4. The focusing structure according to claim 3, characterized in that, The first ring body includes a first hollow region, and the second ring body includes a second hollow region. The first hollow region and the second hollow region are correspondingly arranged, and both the first hollow region and the second hollow region are used to allow light to pass through and enter the lens.
5. A focusing method, characterized in that, include: Step 1: Provide the focusing structure according to claim 1; Step 2: Orient the focal length adjustment ring of the lens of the optical fingerprint recognition module toward the rubber block of the focusing structure. The focal length adjustment ring includes at least one groove, and a portion or all of each groove is located within the orthogonal projection range of the rubber block. Step 3: Press the focusing structure toward the lens, causing the rubber block of the focusing structure to deform during the pressing of the lens, thereby forming at least one protrusion that engages with the focus adjustment ring, with the at least one protrusion located in the at least one groove; Step 4: Rotate the focusing ring of the focusing structure, causing the rubber block of the focusing structure to rotate, and the rubber block in turn drives the focal length adjustment ring to rotate, so as to adjust the focal length of the lens of the optical fingerprint recognition module.
6. The focusing method according to claim 5, characterized in that, The focal length adjustment ring includes at least one focal length adjustment petal, and the at least one groove is located between the at least one focal length adjustment petal.
7. The focusing method according to claim 6, characterized in that, In step 3, the rubber block of the focusing structure deforms during the compression of the lens, and forms at least one protrusion in the at least one groove between the at least one focal length adjustment petal, the at least one protrusion engaging with the at least one focal length adjustment petal.
8. The focusing method according to claim 7, characterized in that, When the rubber block rotates in step 4, the at least one protrusion of the rubber block drives the at least one focal length adjustment petal to rotate, thereby rotating the focal length adjustment ring to adjust the focal length of the lens.