Blind hole type optical fingerprint module with threaded lens

Abstract

The utility model discloses a blind hole type optical fingerprint module with a threaded lens, which relates to the technical field of optical fingerprint modules, and comprises a lens seat and a lens, and the front surface of the lens seat is provided with a mounting groove; the whole lens is cylindrical and is in threaded connection with the lens seat, a plurality of blind holes are formed in the front face of the lens, a focusing jig is used for clamping the blind holes in the front face of the lens to rotate the lens clockwise or anticlockwise, the lens is installed on the lens seat, and the distance between the lens and a chip is changed through rotation to achieve focus position focusing. According to the utility model, the front surface of the lens is provided with the blind hole, so that the lens can be conveniently rotated clockwise or anticlockwise by clamping the blind hole on the lens through a focusing jig, the distance between the lens and the chip is changed to realize focus position focusing, and focusing at different distances is satisfied; and the phenomenon that the appearance of the end face of the lens is poor due to the fact that an existing petal-type clamping structure is easy to slip and cannot be clamped when being in butt joint with the focusing jig is avoided.

Description

Technical Field

[0001] This utility model belongs to the field of optical fingerprint module technology, specifically relating to a blind-hole type optical fingerprint module with a threaded lens. Background Technology

[0002] As optical fingerprint unlocking software technology matures and its applications expand, its security requirements are also increasing. Conventional optical fingerprint unlocking modules may no longer be able to meet the performance requirements, such as the unlocking distance, unlocking brightness, and unlocking security level.

[0003] A search revealed a Chinese patent (CN209562659U) disclosing a lens, specifically a dustproof lens for electronic terminal products. The dustproof lens includes a camera module comprising a lens and a focusing ring. The outer wall of the lens has a plurality of locking petals spaced apart, with a locking gap between adjacent locking petals. The lower surface of the focusing ring has a limiting protrusion that mates with the locking gap. A receiving groove for collecting impurities is provided at the locking gap, and the receiving groove is recessed towards the lens axis. This invention effectively prevents small impurities from entering the camera module during assembly, improves lens manufacturing quality, and extends the lifespan of the camera module.

[0004] This patent features several locking petals spaced apart on the outer wall of the lens, with a locking gap between adjacent locking petals. In use, a focusing fixture is inserted into the locking gap to rotate the lens for focusing. However, the petal-type locking structure is prone to slippage and misalignment under extreme conditions, resulting in poor appearance of the lens end face.

[0005] Based on this, we designed a blind-hole optical fingerprint module with a threaded lens. Utility Model Content

[0006] The purpose of this invention is to address the problem of slippage in existing lens petal-shaped locking structures by providing a blind-hole type optical fingerprint module with a threaded lens.

[0007] This utility model is achieved through the following technical solution:

[0008] A blind-hole type optical fingerprint module with a threaded lens includes a lens mount and a lens. The front of the lens mount is provided with a mounting groove for mounting and fixing the lens and providing it with load-bearing capacity.

[0009] The lens is cylindrical in shape and threaded onto the lens mount. The front of the lens has multiple blind holes for the focusing fixture to hold the lens in place and rotate the lens clockwise or counterclockwise to mount it onto the lens mount. The focus position is adjusted by changing the distance between the lens and the chip through rotation.

[0010] As a preferred embodiment of the blind-hole type threaded lens optical fingerprint module provided by this utility model, the inner wall of the mounting groove of the lens mount is provided with a threaded groove.

[0011] As a preferred embodiment of the optical fingerprint module with a blind hole type threaded lens provided by this utility model, the outer wall of the back of the lens is provided with a threaded protrusion that matches the threaded groove.

[0012] As a preferred embodiment of the optical fingerprint module with a blind hole type threaded lens provided by this utility model, the number of blind holes on the lens is at least four, and the blind holes are distributed in a ring array.

[0013] As a preferred embodiment of the blind-hole type optical fingerprint module with threaded lens provided by this utility model, the blind hole is an arc-shaped groove, a circular groove, an elliptical groove, or a fan-shaped groove.

[0014] In a preferred embodiment of the optical fingerprint module with a blind hole and threaded lens provided by this utility model, the blind hole is disposed on the front side of the lens near the edge.

[0015] As a preferred embodiment of the blind-hole type optical fingerprint module with threaded lens provided by this utility model, a rubber layer is provided on the inner wall of the blind hole, and the surface of the rubber layer is provided with anti-slip teeth.

[0016] As a preferred embodiment of the optical fingerprint module with a blind-hole threaded lens provided by this utility model, after the lens mount and lens complete the focusing action, UV glue is applied in the thread gap to fix the position of the lens relative to the lens mount, so as to avoid focus drift.

[0017] This invention has the following advantages over the prior art:

[0018] This invention features a blind hole on the front of the lens, allowing for clockwise or counterclockwise rotation of the lens by using a focusing fixture to adjust the distance between the lens and the chip, thus achieving focus adjustment at different distances. This also avoids the problem of slippage and misalignment of existing petal-shaped locking structures when docking with focusing fixtures, which can result in poor lens appearance.

[0019] This invention features a rubber layer on the inner wall of a blind hole, with anti-slip teeth on the surface of the rubber layer. When the focusing fixture is inserted into the blind hole, the rubber layer increases the friction between the fixture and the focusing fixture, further preventing slippage. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of a blind-hole optical fingerprint module with a threaded lens;

[0021] Figure 2 This is a schematic diagram of the lens mount in a blind-hole type optical fingerprint module with a threaded lens;

[0022] Figure 3 This is a schematic diagram of the lens structure in a blind-hole type optical fingerprint module with a threaded lens;

[0023] Figure 4 A top view of a blind-hole optical fingerprint module with a threaded lens;

[0024] Figure 5 for Figure 4 A magnified structural diagram of A in the middle;

[0025] Figure 6 This is a right view of a blind-hole optical fingerprint module with a threaded lens.

[0026] The following are the labels in the diagram: 1. Lens mount; 2. Lens; 11. Mounting slot; 12. Threaded groove; 13. Chip mounting position; 21. Threaded protrusion; 22. Blind hole; 23. Rubber layer. Detailed Implementation

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0028] As described in the background section, existing lenses with a petal-shaped locking structure are prone to slippage and misalignment under extreme conditions, resulting in poor appearance of the lens end face.

[0029] To solve this technical problem, this utility model provides a blind-hole type optical fingerprint module with a threaded lens, which is applied in the field of optical fingerprint modules.

[0030] For details, please refer to Figures 1-6The blind-hole type optical fingerprint module with threaded lens specifically includes: a lens mount 1 and a lens 2. The front of the lens mount 1 is provided with a mounting groove 11 for mounting and fixing the lens 2 and providing it with load-bearing capacity.

[0031] The lens 2 is cylindrical in shape and is threaded onto the lens mount 1. The front of the lens 2 has multiple blind holes 22, which are used by the focusing fixture to hold the lens 2 in the blind holes 22 on the front of the lens 2 and rotate the lens 2 clockwise or counterclockwise so that the lens 2 is installed on the lens mount 1. The focus position is adjusted by changing the distance between the lens 2 and the chip through rotation.

[0032] Example 1

[0033] Please see Figures 1-6 A blind-hole type optical fingerprint module with a threaded lens includes a lens mount 1 and a lens 2. The front of the lens mount 1 is provided with a mounting groove 11 for mounting and fixing the lens 2 and providing it with load-bearing capacity. The lens 2 is cylindrical in shape and is threadedly connected to the lens mount 1.

[0034] Specifically, the inner wall of the mounting groove 11 of the lens mount 1 is provided with a threaded groove 12, and the bottom of the mounting groove 11 of the lens mount 1 is provided with a chip mounting position 13 for mounting a chip; the outer wall of the back of the lens 2 is provided with a threaded protrusion 21 that matches the threaded groove 12.

[0035] The front of the lens 2 is provided with multiple blind holes 22, which are used to lock the focusing fixture in place. The lens 2 is rotated clockwise or counterclockwise so that it is mounted on the lens mount 1. The focus position is adjusted by changing the distance between the lens 2 and the chip.

[0036] The lens 2 has at least four blind holes 22 (four in this embodiment, but six or more in other embodiments), and all blind holes 22 are arranged in a ring array near the edge of the front of the lens 2. The blind holes 22 are arc-shaped grooves, circular grooves, elliptical grooves or fan-shaped grooves (arc-shaped grooves are selected in this embodiment).

[0037] Example 2

[0038] The blind-hole optical fingerprint module with a threaded lens provided in Embodiment 1 is further optimized, specifically, as follows: Figure 4 , Figure 5 As shown, a rubber layer 23 is provided on the inner wall of the blind hole 22, and the surface of the rubber layer 23 is provided with anti-slip teeth. When the focusing fixture is stuck in the blind hole on the lens and the lens is rotated clockwise or counterclockwise, there will be no slippage.

[0039] Example 3

[0040] The blind-hole type optical fingerprint module with threaded lens provided in Embodiment 1 or 2 is further optimized, specifically, as follows: Figure 1 , Figure 4 As shown, after the lens mount 1 and lens 2 complete the focusing action, UV glue is applied in the thread gap to fix the position of lens 2 relative to lens mount 1 to avoid focus drift.

[0041] The usage process of the blind-hole type optical fingerprint module with threaded lens provided by this utility model is as follows:

[0042] In use, the lens 2 is installed on the mounting slot 11 of the lens mount 1 by means of threaded connection, and the lens 2 is rotated clockwise or counterclockwise by using the focusing fixture to hold the blind hole 22 on the lens 2 to change the distance between the lens 2 and the chip to achieve focus position adjustment, satisfying focusing at different distances. After the focusing action is completed, UV glue is applied in the thread gap to fix the position of the lens 2 relative to the lens mount 1 to avoid focus drift.

[0043] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, the phrase "comprising an element defined as..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0044] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A blind-hole type optical fingerprint module with a threaded lens, characterized in that: It includes a lens mount (1) and a lens (2). The front of the lens mount (1) is provided with a mounting groove (11) for mounting and fixing the lens (2) and providing it with load-bearing capacity. The lens (2) is cylindrical in shape and threaded onto the lens mount (1). The front of the lens (2) has multiple blind holes (22) for the focusing fixture to hold the blind holes (22) on the front of the lens (2) and rotate the lens (2) clockwise or counterclockwise so that the lens (2) is installed on the lens mount (1). The focus position is adjusted by changing the distance between the lens (2) and the chip.

2. The blind-hole type optical fingerprint module with a threaded lens according to claim 1, characterized in that, The mounting groove (11) of the lens mount (1) has a threaded groove (12) on its inner wall.

3. The blind-hole type optical fingerprint module with a threaded lens according to claim 2, characterized in that, The lens (2) has a threaded protrusion (21) on the back outer wall that matches the threaded groove (12).

4. The blind-hole type optical fingerprint module with a threaded lens according to claim 1, characterized in that, The lens (2) has at least four blind holes (22), and the blind holes (22) are distributed in a ring array.

5. The blind-hole type optical fingerprint module with a threaded lens according to claim 4, characterized in that, The blind hole (22) is an arc-shaped groove, a circular groove, an elliptical groove, or a fan-shaped groove.

6. The blind-hole type optical fingerprint module with a threaded lens according to claim 5, characterized in that, The blind hole (22) is located on the front of the lens (2) near the edge.

7. The blind-hole type optical fingerprint module with a threaded lens according to claim 1, characterized in that, The inner wall of the blind hole (22) is provided with a rubber layer (23), and the surface of the rubber layer (23) is provided with anti-slip teeth.

8. A blind-hole type optical fingerprint module with a threaded lens according to any one of claims 1-7, characterized in that, After the lens mount (1) and lens (2) complete the focusing action, UV glue is applied in the thread gap to fix the position of the lens (2) relative to the lens mount (1).

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