Focus-adjustable optical fingerprint module

Abstract

The utility model discloses a focusable optical fingerprint module, which comprises a flexible circuit board, one end of the flexible circuit board is provided with a carrying area, the flexible circuit board is in lap joint with a lens seat through the carrying area, the top of the lens seat is provided with an opening groove, an internal thread groove is arranged in the opening groove, and the lens seat is provided with a lens. A lens is assembled in the opening groove, an external thread matched with the internal thread groove is formed on the surface of the lens, and the external thread can be in threaded fit with the internal thread groove by rotating the lens. According to the focus-adjustable optical fingerprint module provided by the utility model, the external threads are designed on the surface of the conventional lens, and the internal threads are matched in the corresponding lens mount, so that the lens can be rotated in the lens mount, and the gap distance between the inner end face of the lens and the optical fingerprint identification chip is adjusted; in this way, the focusing effect of the fingerprint module is achieved, and adaptive adjustment and application can be conveniently carried out on different users in different scenes before leaving a factory.

Description

TECHNICAL FIELD

[0001] The utility model relates to optical fingerprint module technical field, especially, a kind of optical fingerprint module of focusing adjustable. BACKGROUND

[0002] Fingerprint module is the core component of fingerprint lock, installed on devices such as fingerprint access control or hard disk, to complete the acquisition and identification of fingerprint module. Fingerprint module is mainly composed of fingerprint acquisition module, fingerprint identification module and expansion function module (such as lock driving module).

[0003] With the optical fingerprint unlocking software technology more and more mature, application field is more and more wide, the performance of the optical fingerprint unlocking module of conventional configuration can not be met, such as the structure of the conventional optical fingerprint unlocking module is mostly fixed, so the optical fingerprint unlocking module of corresponding type can only be applied in corresponding field, and cannot be adjusted according to the actual application scene, which leads to the fact that it cannot meet the needs of different users in different scenes, therefore, a kind of optical fingerprint module of focusing adjustable is proposed. UTILITY MODEL CONTENT

[0004] Therefore, it is necessary to provide an optical fingerprint module of focusing adjustable, which is designed with external threads on the outer surface of a conventional lens, and is designed with internal thread grooves in the corresponding lens seat, so that the lens can rotate in the lens group to realize the movement of the lens.

[0005] In order to solve the above technical problems, the utility model adopts the following technical solutions:

[0006] An optical fingerprint module of focusing adjustable, comprising a flexible circuit board, one end of the flexible circuit board has a mounting area, the flexible circuit board is connected to the lens seat through the mounting area, the top of the lens seat has an open slot, an internal thread groove is provided in the open slot, and a lens is assembled in the open slot, the surface of the lens is formed with external threads matched with the internal thread groove, and rotating the lens can make the external threads threadedly engage with the internal thread groove.

[0007] Wherein, an optical fingerprint identification chip is further provided in the middle of the mounting area, and rotating the lens can make the inner end of the lens away from or close to the optical fingerprint identification chip.

[0008] Further, the bottom of the lens seat has a receiving cavity, and the receiving cavity is in communication with the internal thread groove.

[0009] Further, the optical fingerprint identification chip on the mounting area is accommodated in the receiving cavity and corresponds to the lens above.

[0010] Further, the top of the lens extends upwardly with a connecting column, and the outer diameter of the connecting column is smaller than the outer diameter of the lens.

[0011] Further, the edge of the top of the opening slot is glued with a UV glue block, and the UV glue block has a plurality of.

[0012] Further, the edge of the top of the connecting column is also fixed with a handle, and the outer diameter of the handle is greater than the outer diameter of the lens.

[0013] Further, the adjacent handles form a focusing gap.

[0014] Further, the UV glue block is located in the corresponding focusing gap, and the UV glue block extends towards the direction of the inner threaded groove and is connected with the outer thread, for fixing the lens after focusing relative to the lens seat.

[0015] Further, the focusing gap is clamped with a locking block, and the locking blocks are collectively fixed with an adjusting seat.

[0016] Further, the bottom of the flexible circuit board is fixed with a reinforcing plate at the position corresponding to the mounting area.

[0017] Compared with the prior art, the utility model has the following beneficial effects:

[0018] The optical fingerprint module with adjustable focusing provided by the utility model is designed with external threads on the surface of the conventional lens, and is matched with internal threads in the corresponding lens seat, so that the lens can be rotated in the lens seat, thereby adjusting the gap distance between the inner end face of the lens and the optical fingerprint recognition chip, and the focusing effect of the fingerprint module is realized, and adaptive adjustment and application of different users in different scenes before leaving the factory are facilitated.

[0019] Through the design of the UV glue block, after rotating the lens for focusing, the UV glue is glued at the junction of the internal thread and the external thread, and is cured by light to form the fixing of the adjusted lens, so that the distance between the lens and the optical fingerprint recognition chip is fixed, the out-of-focus situation is avoided, and in the subsequent application process, the UV glue can be removed again to rotate the lens for focusing, and the practicality is higher.

[0020] Through the design of the locking block and the adjusting seat, the locking block is placed in the corresponding focusing gap, the adjusting seat is rotated, the locking block is pushed to rotate the handle, and the synchronous rotation adjustment of the lens is realized. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 The structure diagram of the optical fingerprint module with adjustable focusing provided by the utility model is shown.

[0022] Figure 2 The disassembly structure schematic diagram of the optical fingerprint module with adjustable focus provided by the utility model;

[0023] Figure 3 The limiting rib structure schematic diagram of the optical fingerprint module with adjustable focus provided by the utility model;

[0024] Figure 4 The internal structure schematic diagram of the accommodating cavity of the optical fingerprint module with adjustable focus provided by the utility model;

[0025] Figure 5 The sectional structure schematic diagram of the optical fingerprint module with adjustable focus provided by the utility model;

[0026] Figure 6 The locking block structure schematic diagram of the optical fingerprint module with adjustable focus provided by the utility model;

[0027] Figure 7 The limiting space structure schematic diagram of the optical fingerprint module with adjustable focus provided by the utility model.

[0028] The mark in the drawing is explained as follows:

[0029] Flexible circuit board 1, mounting area 11, reinforcing plate 12;

[0030] Lens seat 2, opening groove 21, internal thread groove 22, accommodating cavity 23;

[0031] UV glue block 210;

[0032] Lens 3, external thread 31, handle 32, connecting column 33;

[0033] Focusing gap 320;

[0034] Optical fingerprint recognition chip 4;

[0035] Locking block 5;

[0036] Adjusting seat 6. Specific implementation

[0037] In order for the personnel in the technical field to better understand the utility model scheme, the technical scheme in the utility model embodiments will be described clearly and completely in combination with the drawings in the utility model embodiments below, obviously, the described embodiments are only a part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the person skilled in the art without creative labor should belong to the scope of protection of the utility model.

[0038] As described in the background, the distance of conventional optical fingerprint unlocking is mostly fixedly set, and after leaving factory, the fingerprint focusing cannot be adjusted according to the actual application scene, which causes that it cannot meet the needs of different users in different scenes.

[0039] In order to solve the technical problem, the utility model provides a kind of optical fingerprint module of focusing, it is applied to optical fingerprint module.

[0040] Specifically, please refer to Figures 1-7 The optical fingerprint module of focusing specifically includes flexible circuit board 1, and one end of the flexible circuit board 1 has a mounting area 11, the flexible circuit board 1 is connected by mounting area 11 with lens seat 2, the top of the lens seat 2 has opening slot 21, and the inside of the opening slot 21 is provided with internal thread groove 22, and the opening slot 21 is equipped with lens 3, the surface of the lens 3 is formed with external thread 31 matched with internal thread groove 22, and rotating lens 3 can make external thread 31 and internal thread groove 22 threadedly cooperate.

[0041] Wherein, optical fingerprint identification chip 4 is further arranged in the middle of the mounting area 11, and rotating lens 3 can make the inner end of lens 3 away from or close to the optical fingerprint identification chip 4.

[0042] The optical fingerprint module of focusing provided by the utility model designs external thread 31 on the surface of conventional lens 3, and cooperates internal thread groove 22 in the corresponding lens seat 2, so that the rotation of lens 3 can be carried out in the lens seat 2, so as to adjust the gap distance between the inner end face of lens 3 and optical fingerprint identification chip 4, and then the focusing effect of the fingerprint module is realized, which is convenient for adaptive adjustment and application of different users in different scenes before leaving factory.

[0043] In order to make the personnel in the technical field better understand the utility model scheme, the technical scheme in the embodiment of the utility model will be clearly and completely described in combination with the drawings.

[0044] It should be noted that, in the case of no conflict, the embodiments in the utility model and the features and technical solutions in the embodiments can be combined with each other.

[0045] It should be noted that: similar signs and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings.

[0046] Embodiment one

[0047] Please refer to Figures 1-7The application discloses a focusing optical fingerprint module, which comprises a flexible circuit board 1, a mounting area 11 is arranged at one end of the flexible circuit board 1, a lens seat 2 is connected to the mounting area 11, an open groove 21 is arranged at the top of the lens seat 2, an internal thread groove 22 is arranged in the open groove 21, and a lens 3 is arranged in the open groove 21, the surface of the lens 3 is provided with an external thread 31 matched with the internal thread groove 22, and the lens 3 is rotated to be screwed with the internal thread groove 22.

[0048] An optical fingerprint recognition chip 4 is further arranged in the middle of the mounting area 11, and the lens 3 is rotated to be away from or close to the optical fingerprint recognition chip 4.

[0049] The bottom of the lens seat 2 is provided with a containing cavity 23, and the containing cavity 23 is communicated with the internal thread groove 22.

[0050] The optical fingerprint recognition chip 4 arranged on the mounting area 11 is contained in the containing cavity 23 and corresponds to the lens 3 above.

[0051] In the embodiment, the external thread 31 is arranged on the outer surface of the conventional lens 3, and the internal thread groove 22 is arranged in the lens seat 2, so that the lens 3 is screwed with the lens seat 2, and the lens 3 is rotated to be screwed with the lens seat 2 in the subsequent application process, so as to adjust the gap between the inner end surface of the lens 3 and the optical fingerprint recognition chip 4, and the focusing of the fingerprint module is realized, so that the application of different users in different scenes can be adjusted before the product is delivered.

[0052] Embodiment two

[0053] The focusing optical fingerprint module provided in the embodiment is further optimized, and specifically, as shown in the figure, the top of the lens 3 is extended upwards with a connecting column 33, the outer diameter of the connecting column 33 is smaller than the outer diameter of the lens 3. Figure 4

[0054] The edge of the top of the open groove 21 is glued to form a UV glue block 210, and the UV glue block 210 has a plurality of

[0055] The UV glue block 210 in the embodiment is formed by gluing UV glue on the top of the open groove 21 after the lens 3 is screwed with the internal thread groove 22 through the external thread 31, and the UV glue block 210 is finally formed by lightening after gluing, so that the lens 3 is limited, and the out-of-focus situation in the subsequent application process is avoided.

[0056] As shown in the figure, Figure 4 ​As shown, the edge of the top of the connecting column 33 is also fixed with a rotating handle 32, through the design of multiple rotating handles 32, the external adjusting tool is left with a connecting position, and the specific adjusting method of the external tool is described in embodiment three.

[0057] The adjacent rotating handles 32 form a focusing gap 320 therebetween;

[0058] Multiple UV glue blocks 210 are located in the corresponding focusing gap 320, and the UV glue blocks 210 extend towards the direction of the inner threaded groove 22 and are connected with the external thread 31, for fixing the lens 3 after focusing relative to the lens seat 2;

[0059] After the distance between the lens 3 and the optical fingerprint recognition chip 4 is adjusted according to the actual application scene of the user before leaving the factory, the glue can be dispensed in the focusing gap 320 formed between the adjacent rotating handles 32, so that the glue contacts the connecting position of the external thread 31 and the inner threaded groove 22, and after the glue is cured, the lens 3 can be fixed. Similarly, in the subsequent application process, the cured UV glue can also be removed separately to release the limiting effect on the lens 3, and the focusing can be adjusted again according to the different application scenes, and finally fixed by the UV glue.

[0060] Embodiment three

[0061] The focusing optical fingerprint module provided in embodiment one or two is further optimized, as shown in Figure 6 The focusing gap 320 is clamped with a locking block 5, and multiple locking blocks 5 are fixed with an adjusting seat 6;

[0062] In the actual focusing process, the locking block 5 can be placed in the corresponding focusing gap 320, and then the adjusting seat 6 is rotated to drive the locking block 5 and the lens 3 to rotate, so that it is not necessary to manually touch the surface of the lens 3 for lens adjustment, and the problem of easily causing dirt on the surface of the lens 3 due to direct touching of the hand is avoided;

[0063] As a further optimization of this embodiment: the bottom of the flexible circuit board 1 is fixed with a reinforcing plate 12 at the position corresponding to the mounting area 11, through the design of the reinforcing plate 12, the strength support of the flexible circuit board 1 at the position corresponding to the mounting area 11 is realized, so that the installation stability of the lens seat 2 on the flexible circuit board 1 is ensured.

[0064] The use process of the optical fingerprint module with adjustable focus provided by the utility model is as follows: the lens with external thread 31 is screwed into the corresponding lens seat 2 through the internal thread groove 22, so that the lens and the lens seat 2 are threadedly matched, then the UV glue is dispensed in the focusing gap 320, the glue contacts the connecting part of the external thread 31 and the internal thread groove 22, curing forms the UV glue block 210, and the lens 3 of the optical fingerprint module is fixed;

[0065] Before leaving the factory, in different application scenarios and facing different user groups, the lens 3 can be rotated to form a thread matching with the lens seat 2, so as to adjust the gap between the inner end of the lens 3 and the optical fingerprint recognition chip 4, realize the focusing of the optical fingerprint module, the locking block 5 can also be placed inside the corresponding focusing gap 320, then the adjusting seat 6 is rotated to make the lens 3 rotate and focus, and finally the glue is fixed.

[0066] In the utility model, unless otherwise clearly defined and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrated; it can be mechanical connection, or electrical connection or communication with each other; it can be directly connected, or indirectly connected through an intermediate medium, it can be the communication or interaction relationship between two elements, unless otherwise clearly defined. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0067] Obviously, the above described embodiments are only part of the embodiments of the utility model, not all the embodiments, the preferred embodiments of the utility model are given in the drawings, but do not limit the patent range of the utility model. The utility model can be realized in many different forms, on the contrary, the purpose of providing these embodiments is to make the disclosure of the utility model more thorough and comprehensive. Although the utility model is described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions recorded in the foregoing specific embodiments, or make equivalent replacement to part of the technical features. Any equivalent structure made by using the contents of the utility model specification and drawings, directly or indirectly used in other related technical fields, is also within the patent protection range of the utility model.

Claims

1. An optical fingerprint module with adjustable focus, characterized in that, The utility model provides a flexible circuit board (1) is provided with a mounting area (11) on one end, and the mounting area (11) is connected with a lens seat (2), the top of the lens seat (2) is provided with an open slot (21), and the inside of the open slot (21) is provided with an internal thread groove (22), and the open slot (21) is provided with a lens (3), the surface of the lens (3) is provided with an external thread (31) matched with the internal thread groove (22), and the lens (3) is rotated to make the external thread (31) and the internal thread groove (22) threadedly matched. The lens (3) is rotated to make the lens (3) far away or close to the optical fingerprint identification chip (4).

2. The tunable optical fingerprint module according to claim 1, wherein, The bottom of the lens seat (2) is provided with a containing cavity (23) communicated with the internal thread groove (22).

3. The focus-tunable optical fingerprint module according to claim 2, wherein, The optical fingerprint identification chip (4) is contained in the containing cavity (23) and corresponds to the lens (3) above.

4. The tunable optical fingerprint module of claim 1, wherein, The top of the lens (3) is provided with a connecting column (33) with an outer diameter smaller than that of the lens (3).

5. The focus-tunable optical fingerprint module according to claim 4, characterized in that, The edge of the top of the open slot (21) is provided with a UV glue block (210) formed by glue dispensing, and the UV glue block (210) has a plurality of.

6. The focus-tunable optical fingerprint module according to claim 5, wherein, The edge of the top of the connecting column (33) is further provided with a handle (32) with an outer diameter larger than that of the lens (3).

7. The focus-tunable optical fingerprint module according to claim 6, characterized in that, The handle (32) between adjacent handle (32) is provided with a focusing gap (320).

8. The focus-tunable optical fingerprint module according to claim 7, characterized in that, The UV glue block (210) is located in the corresponding focusing gap (320), and the UV glue block (210) extends towards the internal thread groove (22) and is connected with the external thread (31), so as to fix the lens (3) after focusing relative to the lens seat (2).

9. The focus-tunable optical fingerprint module according to claim 8, wherein, The focusing gap (320) is provided with a locking block (5), and the locking block (5) is fixed with an adjusting seat (6).

10. The tunable optical fingerprint module of claim 1, wherein, The bottom of the flexible circuit board (1) is provided with a reinforcing plate (12) corresponding to the mounting area (11).

Images