Waterproof lamp ring fingerprint module

Abstract

The utility model discloses a waterproof lamp ring fingerprint module, which belongs to the technical field of fingerprint modules and comprises a metal shell, a flexible circuit board is arranged at the bottom of the metal shell and comprises a first section, a second section, a third section and a fourth section, a first section, a second section, a third section and a fourth section of the circuit board are sequentially and flexibly connected, the back of the first section and the back of the second section are mutually attached to form an upper board, the back of the third section and the back of the fourth section are mutually attached to form a lower board, and the front face of the first section is connected with a fingerprint sensor. The front face of the second section is connected with an indicating lamp, the front face of the third section is connected with a plurality of supporting pieces, the other ends of the supporting pieces make contact with the front face of the second section, the fourth section is connected with a connecting base, the upper plate is located in the metal shell, the metal shell is installed on the upper end face of the lower plate, and the space between the lower plate and the metal shell is filled with waterproof glue. And the overall waterproofness and light transmission can be ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of fingerprint modules, and more specifically, to a waterproof lamp ring fingerprint module. Background Art

[0002] With the increasing development of the market, after users use fingerprint-related products and gradually have a better understanding of fingerprint modules, more and more requirements are put forward. For example, the protection ability against daily rainwater droplets when the actual product is installed outdoors, and the luminous function required for indication by the fingerprint module itself have gradually become important indicators concerned by customers.

[0003] In the prior art, the common structure of an inner-light-emitting fingerprint module mainly consists of a metal shell, a light homogenizing ring, a fingerprint sensor, lamp beads, a spacer plate, and a circuit board, etc. The fingerprint sensor is fixed on the upper surface of the spacer plate, the lamp beads are fixed on the upper surface of the circuit board, and the light homogenizing ring surrounds the outer circle of the fingerprint sensor and is fixed on the upper surface of the circuit board; by setting the height of the light homogenizing ring, an annular cavity is formed between the upper surface of the circuit board, the inner side surface of the metal shell, and the outer side surface of the spacer plate, and the lamp beads emit light in the cavity.

[0004] Due to the design requirements of the overall dimensions, special control is carried out on the tolerances of components. After mass production, processing, and assembly, there are certain assembly gaps in the products; the assembly gaps on the front side include the side gap between the light homogenizing ring and the fingerprint sensor, the gap at the position where the light homogenizing ring presses the spacer plate, the gap where the metal shell presses the light homogenizing ring, and the patch gap between the fingerprint sensor and the spacer plate, etc. If the existing structure of the actual product meets the requirements of the waterproof process, waterproof glue needs to be filled at all the assembly gaps of the product. These problems such as small glue injection gaps, many positions, and great difficulty not only increase the difficulty of production and assembly, require more precise and expensive glue injection equipment, but also reduce the production efficiency and the qualified rate of finished products. A solution is proposed for the above problems. Summary of the Utility Model

[0005] Aiming at the problems existing in the prior art, the purpose of the utility model is to provide a waterproof lamp ring fingerprint module, which can ensure the overall waterproofness and light transmittance.

[0006] To solve the above problems, the utility model adopts the following technical solutions.

[0007] A waterproof lamp ring fingerprint module, comprising a metal housing, a flexible circuit board is arranged at the bottom of the metal housing, the flexible circuit board includes a first section, a second section, a third section and a fourth section, the first section, the second section, the third section and the fourth section of the circuit board are flexibly connected in sequence, the back of the first section and the back of the second section are mutually attached to form an upper plate, the back of the third section and the back of the fourth section are mutually attached to form a lower plate, the upper plate and the lower plate are parallel to each other, a fingerprint sensor is connected to the front of the first section, an indicator light is connected to the front of the second section, a plurality of support members are connected to the front of the third section, the other ends of the plurality of support members are in contact with the front of the second section, a connecting seat is connected to the fourth section, the upper plate is located inside the metal housing, an annular gap is formed between the upper plate and the metal housing, the metal housing is installed on the upper end surface of the lower plate, and waterproof glue is filled between the lower plate and the metal housing.

[0008] Preferably, reinforcing steel sheets are respectively bonded to the bottoms of the first section, the second section, the third section and the fourth section.

[0009] Preferably, the cross-sections of the first section and the second section are the same, the cross-sections of the third section and the fourth section are the same, and the cross-sectional area of the upper plate is smaller than that of the lower plate.

[0010] Preferably, the upper end surface of the waterproof glue is at the same height as the fingerprint sensor.

[0011] Compared with the prior art, the advantages of the present utility model are as follows:

[0012] First, the traditional design of the uniform light ring is cancelled in this solution. By directly injecting waterproof glue into the gap, the overall waterproof requirement can be achieved, and at the same time, the waterproof glue can be used as a light homogenizing medium to achieve the effect of a circular indication area around the fingerprint sensor. This not only simplifies the production and assembly process, but also reduces the difficulty of applying glue. There is no need to consider the glue application position, just fill the space between the metal housing and the lower plate, which effectively improves the processing efficiency and the yield rate.

[0013] Second, the reinforcing steel sheet is used to increase the strength of the overall flexible circuit board and extend the service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 is a three-dimensional structural schematic diagram of the present utility model;

[0015] Figure 2 is a cross-sectional structural schematic diagram of the present utility model;

[0016] Figure 3 is an unfolded structural schematic diagram of the flexible circuit board of the present utility model;

[0017] Figure 4 Schematic diagram of the folding structure of the flexible circuit board of the present utility model.

[0018] Description of the reference numerals in the figure:

[0019] 1. Metal housing; 2. Flexible circuit board; 3. First interval; 4. Second interval; 5. Third interval; 6. Fourth interval; 7. Upper plate; 8. Lower plate; 9. Fingerprint sensor; 10. Indicator light; 11. Support member; 12. Connection seat; 13. Waterproof glue; 14. Reinforcing steel sheet. Specific implementation manner

[0020] Embodiment 1:

[0021] Please refer to Figures 1-4 , a waterproof lamp ring fingerprint module, including a flexible circuit board 2, the flexible circuit board 2 includes a first interval 3, a second interval 4, a third interval 5 and a fourth interval 6, the first interval 3, the second interval 4, the third interval 5 and the fourth interval 6 of the circuit board are sequentially flexibly connected, and reinforcing steel plates for strengthening are respectively bonded to the back surfaces of the first interval 3, the second interval 4, the third interval 5 and the fourth interval 6 of the circuit board, and each reinforcing steel plate is adapted to the corresponding flexible circuit. The front surface of the first interval 3 is electrically connected to a fingerprint sensor 9, the front surface of the second interval 4 is electrically connected to an indicator light 10, a plurality of support members 11 are fixedly connected to the front surface of the third interval 5, and the front surface of the fourth interval 6 is connected to a connection seat 12 for connecting to an external device.

[0022] The reinforcing steel plates on the back of the first interval 3 and the reinforcing steel plates on the back of the second interval 4 are mutually attached to form an upper plate 7, and the cross-sections of the first interval 3 and the second interval 4 are the same. The reinforcing steel plates on the back of the third interval 5 and the reinforcing steel plates on the back of the fourth interval 6 are mutually attached to form a lower plate 8, and the cross-sections of the third interval 5 and the fourth interval 6 are the same. The two mutually attached reinforcing steel plates are bonded by glue. At the same time, the front surface of the second interval 4 corresponds to the front surface of the third interval 5, and the other ends of the plurality of support members 11 are fixedly connected to the front surface of the second interval 4. The support members 11 play a supporting role between the upper plate 7 and the lower plate 8, so as to ensure that the upper plate 7 and the lower plate 8 are parallel to each other.

[0023] A metal housing 1 is sleeved outside the upper plate 7. The metal housing 1 is annular. The upper plate 7 and the metal housing 1 are concentric and there is an annular gap. The annular gap is used for the light of the indicator light 10 to penetrate. The cross-section of the upper plate 7 is smaller than the cross-section of the lower plate 8. Thus, the metal housing 1 is fixed on the upper end surface of the lower plate 8, and waterproof glue 13 is filled between the lower plate 8 and the metal housing 1. The upper end surface of the waterproof glue 13 is at the same height as the fingerprint sensor 9.

[0024] Working principle:

[0025] The traditional design of the uniform light ring is cancelled. By directly injecting waterproof glue 13 into the gap, the overall waterproof requirement can be achieved. At the same time, the waterproof glue 13 can act as a light homogenizing medium to achieve the effect of a circular indication area around the fingerprint sensor 9. Meanwhile, the overall work process is simplified, and the difficulty of applying glue is reduced. There is no need to consider the glue application position, and it only needs to fill the space between the metal housing 1 and the lower plate 8, effectively improving the processing efficiency and the finished product rate.

Claims

1. A waterproof light ring fingerprint module, characterized in that: The invention comprises a metal shell (1), wherein a flexible circuit board (2) is arranged at the bottom of the metal shell (1), wherein the flexible circuit board (2) comprises a first section (3), a second section (4), a third section (5) and a fourth section (6), wherein the first section (3), the second section (4), the third section (5) and the fourth section (6) of the circuit board are flexibly connected in sequence, wherein the back of the first section (3) and the back of the second section (4) are bonded to each other to form an upper plate (7), wherein the back of the third section (5) and the back of the fourth section (6) are bonded to each other to form a lower plate (8), wherein the upper plate (7) and the lower plate (8) are parallel to each other, and wherein the first section (3) and the second section (4) are bonded to each other to form an upper plate (7), wherein the back of the third section (5) and the back of the fourth section (6) are bonded to each other to form a lower plate (8), wherein the upper plate (7) and the lower plate (8) are parallel to each other, and wherein the first section (3) and the second section (4) are bonded to each other to form an upper plate (7), wherein the back of the third section (5) and the back of the fourth section (6) are bonded to each other to form a lower plate (8), wherein the first section (3) and the second section (4) are bonded to each other to form an upper plate (7 ... The front of the section (3) is connected to a fingerprint sensor (9), the front of the second section (4) is connected to an indicator light (10), the front of the third section (5) is connected to a plurality of support members (11), the other ends of the plurality of support members (11) are in contact with the front of the second section (4), the fourth section (6) is connected to a connection seat (12), the upper plate (7) is located inside the metal shell (1), and an annular gap is formed between the upper plate (7) and the metal shell (1), the metal shell (1) is mounted on the upper end surface of the lower plate (8), and a waterproof glue (13) is filled between the lower plate (8) and the metal shell (1).

2. The waterproof light ring fingerprint module according to claim 1, characterized in that: The bottoms of the first section (3), the second section (4), the third section (5) and the fourth section (6) are respectively bonded with matching reinforcing steel sheets (14).

3. The waterproof light ring fingerprint module according to claim 1, characterized in that: The cross-sections of the first section (3) and the second section (4) are the same, the cross-sections of the third section (5) and the fourth section (6) are the same, and the cross-section area of ​​the upper plate (7) is smaller than the cross-section area of ​​the lower plate (8).

4. The waterproof light ring fingerprint module according to claim 1, characterized in that: The upper end surface of the waterproof glue (13) is at the same height as the fingerprint sensor (9).

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