Shading structure of power button fingerprint light-emitting module

Abstract

The utility model discloses a shading structure of a power key fingerprint light-emitting module, belongs to the technical field of power keys, and aims to solve the problems that the local light leakage phenomenon of a product is caused due to the fact that a locating notch is formed in the structural design, and the sheet-shaped light leakage phenomenon of the product is caused due to the fact that a shading glue position shrinks after injection molding. Comprising a light guide lens, an LED lamp, a first key, a second key, a fingerprint module, a flexible circuit board, a bottom plate, an elastomer material layer and an insulating material layer, the LED lamp is arranged on one side in the light guide lens, a containing through groove is formed in the light guide lens, the bottom plate is arranged on the bottom face of the containing through groove of the light guide lens, and the flexible circuit board is arranged above the bottom plate; according to the utility model, through the arrangement of the light guide lens and the first key, a positioning notch in the original light guide lens is removed, the structural position of light leakage is effectively reduced, the original positioning effect is independently changed into the first key, and the first key is designed into a connected whole, so that the first key has a positioning effect.

Description

TECHNICAL FIELD

[0001] The utility model belongs to power button technical field, concretely relates to power button fingerprint light emitting module light shielding structure. BACKGROUND

[0002] The power button light emitting module structural member is divided into light guide lens, plastic key, PCBA and fingerprint module, and the plastic key is pressed to trigger the circuit to work, and the function of starting the machine is generated, and the fingerprint module has the function of reading and confirming whether the fingerprint of the user is consistent with the pre-stored fingerprint, and the output start command is confirmed after the consistency is determined. The light emitted by the LED on the PCBA is refracted to the outer surface of the product through the light guide lens, and there are usually R, G, B and W four colors, which have the effects of machine working state display and appearance beautification. Since the light guide lens is produced by transparent PC plastic material, the whole body is transparent, but the light on the module needs to be transparent in the specific light emitting circle, so the most important thing in the structure design and production process of the light guide lens is to ensure that no light leakage occurs at other positions around the light emitting circle, otherwise the appearance light emitting effect of the module will be affected, thereby affecting the unqualified appearance of the whole notebook computer.

[0003] In the power button light emitting module structural member in the prior art, the light guide lens uses the same outer circle black paint spraying, but the structure design of the middle position of the lens has positioning notches and shrinkage after injection molding, which causes the black paint spraying to be not in place and the structure gap to be too large, and light leakage phenomenon is very easy to occur, and the production defect rate is very high. Starting from the actual situation, the prior art has two problems: 1. The structure design of the middle position of the light guide lens has positioning notches, and the periphery of the notches is a 90-degree right angle, so that the black paint spraying cannot cover the whole, and the light leaks from the periphery of the notches and then leaks from the periphery of the fingerprint module to the appearance, causing the product to have local light leakage phenomenon; 2. A circle of light shielding glue position in the middle position of the light guide lens will shrink after injection molding, causing a gap between the surface and the PCBA, and light can leak, and then leak from the periphery of the fingerprint module to the appearance, causing the product to have sheet-shaped light leakage phenomenon.

[0004] Therefore, the power button fingerprint light emitting module light shielding structure is needed to solve the problems of the structure design having positioning notches, causing the product to have local light leakage phenomenon, and the light shielding glue position shrinking after injection molding, causing the product to have sheet-shaped light leakage phenomenon. INVENTION CONTENTS

[0005] The utility model aims at providing the power button fingerprint light emitting module light shielding structure to solve the problems in the background art.

[0006] In order to achieve the above object, the utility model provides the following technical scheme: Power button fingerprint light emitting module light shielding structure, including light guide lens, LED lamp, first button, second button, fingerprint module, flexible circuit board, bottom plate, elastomer material layer and insulating material layer, the LED lamp sets up in the inside one side of light guide lens, the inside of light guide lens is equipped with accommodating through groove, the bottom plate sets up in the bottom surface of the accommodating through groove of light guide lens, the flexible circuit board sets up in the top of bottom plate, the second button sets up in the top of flexible circuit board, the fingerprint module is set up in the top of second button through adhesive, and the top surface of fingerprint module is flush with light guide lens, the first button sets up in one side of second button, the elastomer material layer sets up between flexible circuit board and light guide lens.

[0007] It should be noted that the light guide lens is made of transparent PC material, which is sprayed with black paint, and the top surface of the light guide lens is provided with a light transmission area 101.

[0008] Further, the light transmission area is engraved white, with a width of 2.0 mm, and the width of the light transmission area is designed to be 2.0 mm to ensure that the light can be evenly and effectively transmitted to the required area.

[0009] Further, the first button and the second button are made of PC+ABS material and are black in color.

[0010] As a preferred embodiment, the elastomer material layer is made of light shielding EVA with a thickness of 0.15 mm, and the material is black EVA and single-sided double-sided adhesive.

[0011] As a preferred embodiment, the fingerprint module is set on the top of the second button through the adhesive, and the model of the adhesive is 3M55261 with a thickness of 0.1 mm.

[0012] As a preferred embodiment, the insulating material layer is set on the back of the bottom plate with a thickness of 0.05 mm.

[0013] Compared with the prior art, the power button fingerprint light emitting module light shielding structure provided by the utility model has at least the following beneficial effects:

[0014] (1) By setting the light guide lens and the first button, the positioning notch in the original light guide lens is removed, effectively reducing the structure position of light leakage, and the original positioning effect is changed to the first button, and the first button is designed as a connected whole, so that it has a positioning function.

[0015] (2) By setting the middle light shielding glue position of the light guide lens increases a layer of black elastomer material layer, fills the gap between it and the PCB, blocks the gap of light leakage, improves the light shielding effect of the structure. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is the back structure schematic view of the utility model;

[0017] Figure 2 It is the left view structure schematic view of the utility model;

[0018] Figure 3 It is the Figure 1 A-A section structure schematic view of the utility model;

[0019] Figure 4 It is the front structure schematic view of the utility model;

[0020] Figure 5 It is the Figure 4 B-B section structure schematic view of the utility model.

[0021] In the drawing: 1, light guide lens;2, LED lamp;3, first button;4, second button;5, fingerprint module;6, flexible circuit board;7, bottom plate;8, elastomer material layer;9, insulating material layer;101, light transmission area. DETAILED DESCRIPTION

[0022] The utility model is further described below in combination with examples.

[0023] Please refer to Figures 1-5 , the utility model provides power button fingerprint light emitting module light shielding structure, including light guide lens 1, LED lamp 2, first button 3, second button 4, fingerprint module 5, flexible circuit board 6, bottom plate 7, elastomer material layer 8 and insulating material layer 9, LED lamp 2 is set up in the inside one side of light guide lens 1, and the inside of light guide lens 1 is set up with accommodating through groove, and bottom plate 7 is set up in the bottom surface of the accommodating through groove of light guide lens 1, and flexible circuit board 6 is set up in the top of bottom plate 7, and second button 4 is set up in the top of flexible circuit board 6, and fingerprint module 5 is set up in the top of second button 4 through adhesive, and fingerprint module 5 is flush with the top surface of light guide lens 1, and first button 3 is set up in one side of second button 4, and elastomer material layer 8 is set up between flexible circuit board 6 and light guide lens 1.

[0024] Further as Figure 3 , Figure 4 And Figure 5 It is shown that it is worth specifically explained that light guide lens 1 adopts transparent PC material, and is sprayed with black paint, and the top surface of light guide lens 1 is provided with light transmission area 101.

[0025] Further as shown in Figure 3 , Figure 4 and Figure 5 , it is worth noting that the light transmission area 101 is white by laser engraving, and the width is 2.0mm;

[0026] The width of the light transmission area 101 is designed to be 2.0mm to ensure that light can be evenly and effectively transmitted to the desired area.

[0027] Further as shown in Figure 3 , Figure 4 and Figure 5 , it is worth noting that the first button 3 and the second button 4 are made of PC+ABS material, and the whole is black.

[0028] According to the above working process, it can be known that by setting the light guide lens 1 and the first button 3, the positioning notch in the original light guide lens is removed, the structure position of light leakage is effectively reduced, the original positioning effect is changed to the first button 3, and the first button 3 is designed as a connected whole, so that it has a positioning effect.

[0029] Further as shown in Figure 3 , Figure 4 and Figure 5 , it is worth noting that the elastomer material layer 8 adopts light shielding EVA, the thickness is 0.15mm, and the material adopts black EVA and single-sided double-sided adhesive;

[0030] The elastomer material layer 8 adopts light shielding EVA, which not only provides certain elasticity and buffering effect, but also prevents light from leaking from the gap between the button and the light guide lens.

[0031] Further as shown in Figure 3 , Figure 4 and Figure 5 , it is worth noting that the fingerprint module 5 is arranged above the second button 4 by an adhesive, and the model of the adhesive is 3M55261, and the thickness is 0.1mm;

[0032] The fingerprint module 5 is firmly arranged above the second button 4 by the adhesive, and is flush with the top surface of the light guide lens 1, and this design enables the user to naturally contact the fingerprint module when touching the button, and when the user places the finger on the fingerprint module 5, the fingerprint module 5 captures the fingerprint information on the surface of the finger and converts it into an electrical signal for processing and identification.

[0033] Further as shown in Figure 3 , Figure 4 and Figure 5 Figure 3 Figure 4 Figure 5 , it is worth noting that the insulating material layer 9 is arranged on the back of the bottom plate 7, and the thickness is 0.05mm.

[0034] The light leakage prevention method of the light guide lens structure can be applied to products such as notebook computers, keyboards, and mice that need to emit light at a fixed position.

[0035] The scheme has the following working process: in use, when the LED light is activated, the light emitted by the LED light is conducted inside the light guide lens 1, the light guide lens 1 is made of transparent PC material and sprayed with black paint, but the top is provided with a light transmission area 101, the light transmission area 101 is made white by laser engraving, so that the light is more easily reflected and scattered at this position, thereby achieving the desired light emitting effect at a specific position; the positioning notch in the light guide lens 1 is removed and instead integrated into the first button 3, this design not only simplifies the manufacturing process of the light guide lens 1, but also effectively reduces the structure position that may cause light leakage, and the fixed position of the light guide lens 1 and the first button 3 is sprayed with black paint, the elastomer material layer 8 is attached to the periphery of the first button 3, the other surface of the elastomer material layer 8 is extruded and deformed with the flexible circuit board 6, ensuring that no gap is generated, and the gap that may cause light leakage is blocked.

[0036] In summary: by setting the light guide lens 1 and the first button 3, the positioning notch in the original light guide lens is removed, the structure position that may cause light leakage is effectively reduced, the original positioning effect is changed to the first button 3 alone, the first button 3 is designed as a connected whole, and has a positioning function; by setting a layer of black elastomer material layer 8 at the middle light blocking glue position of the light guide lens 1, the gap between the light guide lens 1 and the PCB is filled, the gap that may cause light leakage is blocked, and the light blocking effect of the structure is improved.

Claims

1. A light shielding structure of a power button fingerprint light-emitting module, comprising a light guide lens (1), an LED lamp (2), a first button (3), a second button (4), a fingerprint module (5), a flexible circuit board (6), a bottom plate (7), an elastomer material layer (8), and an insulating material layer (9), characterized in that: The LED lamp (2) is arranged on the inner side of the light guide lens (1), the inner side of the light guide lens (1) is provided with a containing groove, the bottom plate (7) is arranged on the bottom surface of the containing groove of the light guide lens (1), the flexible circuit board (6) is arranged above the bottom plate (7), the second button (4) is arranged above the flexible circuit board (6), the fingerprint module (5) is arranged above the second button (4) through an adhesive, and the fingerprint module (5) is flush with the top surface of the light guide lens (1), the first button (3) is arranged on one side of the second button (4), and the elastomer material layer (8) is arranged between the flexible circuit board (6) and the light guide lens (1).

2. The power button fingerprint light-emitting module light shielding structure according to claim 1, characterized in that: The light guide lens (1) is made of transparent PC material and is sprayed with black paint, and the top surface of the light guide lens (1) is provided with a light transmission area (101). 3.The power button fingerprint light-emitting module light shielding structure according to claim 2, characterized in that: The light transmission area (101) is engraved white by laser, and the width is 2.0 mm.

4. The power button fingerprint light-emitting module light shielding structure according to claim 3, characterized in that: The first button (3) and the second button (4) are made of PC+ABS material and are black as a whole.

5. The power button fingerprint light-emitting module light shielding structure according to claim 1, wherein: The model of the adhesive is 3M55261, and the thickness is 0.1 mm. 6.The power button fingerprint light-emitting module light shielding structure according to claim 5, characterized in that: The insulating material layer (9) is arranged on the back surface of the bottom plate (7), and the thickness is 0.05 mm.

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