CN211718905U - Fingerprint side key - Google Patents
Fingerprint side key Download PDFInfo
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- CN211718905U CN211718905U CN202020384559.XU CN202020384559U CN211718905U CN 211718905 U CN211718905 U CN 211718905U CN 202020384559 U CN202020384559 U CN 202020384559U CN 211718905 U CN211718905 U CN 211718905U
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- circuit board
- fingerprint
- side key
- hard circuit
- sealing
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Abstract
The utility model discloses a fingerprint side key, which comprises a flexible circuit board, wherein the upper surface and the lower surface of the flexible circuit board are respectively provided with a first hard circuit board and a second hard circuit board, the upper surface of the first hard circuit board is provided with a fingerprint identification chip, the upper surface of the fingerprint identification chip is provided with a decorative layer, the upper side of the first hard circuit board is provided with a first hard circuit board step, the outer side of the first hard circuit board step is provided with a sealing ring, and the lower surface of the second hard circuit board is provided with a light touch switch; through setting up the sealing washer in groove, set up the gluey groove of sealing and sealed glue at sealing washer upper surface and lower surface, the outside overflow of bottom filling glue in welding clearance and the encapsulating hole has been restricted in the fingerprint side key, obtains dual sealed effect, has further promoted waterproof dustproof function, sets up the sealed limit on the sealing washer and can make the fingerprint side key inseparable, install in the complete machine casing steadily, is one kind and collects fingerprint identification, dabs switch in an organic whole, and the excellent fingerprint side key of waterproof dustproof function.
Description
Technical Field
The utility model belongs to the technical field of the touch-control technique and specifically relates to a fingerprint side key is related to.
Background
Fingerprint identification module is more and more applied to in the cell-phone at present. Under the general condition, the fingerprint module includes fingerprint chip and the circuit board of electricity connection fingerprint chip. However, most circuit boards and fingerprint chips cannot be completely combined, so that the sealing performance between the circuit boards and the fingerprint chips is poor. Thereby make easily corroded, pollute between fingerprint chip and the circuit board, or sneak into impurity, cause the fingerprint module impaired to reduce the security of fingerprint module.
In the prior art, a patent with application number 201610771828.6 discloses a fingerprint module, a fingerprint module manufacturing method and a mobile terminal, and a method of edge dispensing is adopted, so that the outline of a chip needs to be extended for a certain distance on the outline of a circuit board, and a space is provided for dispensing; in addition, the chip shape needs to be expanded on the basis of the expanding distance to provide space for the waterproof adhesive, so that the chip has larger shape and size, cannot meet the application requirement of the side keys of the mobile phone, and is generally applied to the front keys; moreover, because the circuit board is required to be sealed with glue, the appearance of the circuit board is required to be smaller than that of the chip, so that the circuit board can be fixed on other parts of the whole machine only through an adhesive and cannot move when the whole machine is assembled, a light touch switch cannot be used as a key, and a vibration motor is required to be added to realize press feedback.
SUMMERY OF THE UTILITY MODEL
The utility model discloses a solve the weak point that above-mentioned prior art exists, provide collect fingerprint identification, dab switch and waterproof dustproof function in a fingerprint side key of an organic whole.
The technical solution of the utility model is realized through following mode: the utility model provides a fingerprint side key, includes the flexible circuit board, and wherein, flexible circuit board upper surface and lower surface are equipped with first stereoplasm circuit board and second stereoplasm circuit board respectively, and first stereoplasm circuit board upper surface is equipped with the fingerprint identification chip, and the fingerprint identification chip upper surface is equipped with the decorative layer, and first stereoplasm circuit board upside is equipped with first stereoplasm circuit board step, and this first stereoplasm circuit board step outside is equipped with the sealing washer, and second stereoplasm circuit board lower surface is equipped with dabs the switch.
The utility model discloses a fingerprint side key sets up the fingerprint identification chip on first stereoplasm circuit board upper surface and on second stereoplasm circuit board lower surface respectively with dabbing the switch to through setting up first stereoplasm circuit board step at first stereoplasm circuit board upside, set up the sealing washer in the first stereoplasm circuit board step outside again, can make fingerprint side key realize collecting fingerprint identification, dabbing switch and waterproof dustproof function in an organic whole, fingerprint side key appearance is less, can be applied to cell-phone side fingerprint button.
Specifically, a first connecting pad is arranged on the upper surface of the first hard circuit board, the fingerprint identification chip is welded on the upper surface of the first hard circuit board through the first connecting pad, and a welding gap is formed between the fingerprint identification chip and the upper surface of the first hard circuit board. The first connecting bonding pad is formed by adopting the processes of exposure, development and etching, and the structure can ensure that the fingerprint identification chip and the first connecting bonding pad have extremely high position precision.
Specifically, the fingerprint side key is further provided with a glue filling hole penetrating through the first hard circuit board, the flexible circuit board and the second hard circuit board, the glue filling hole is communicated with the welding gap, and underfill is arranged in the glue filling hole and the welding gap.
Specifically, the outline of the fingerprint identification chip and the outline of the first hard circuit board are larger than those of the first hard circuit board step, a groove is formed in the outer side of the first hard circuit board step and the outer side of the welding gap, and a sealing ring is arranged at the groove. The sealing ring can seal the groove formed on the outer side of the step of the first hard circuit board and the outer side of the welding gap, and limits the outward overflow of the underfill.
Furthermore, the whole machine shell is provided with an assembly hole which has the same shape with the fingerprint identification chip and is slightly larger than the fingerprint identification chip, the fingerprint identification chip penetrates through the assembly hole from the inside to the outside of the whole machine shell, and the sealing ring is contacted with the inner surface of the whole machine shell. In addition, the outline of the first hard circuit board is larger than that of the fingerprint identification chip, and the first hard circuit board can be used as a hanging table for assembling the whole machine and limits the fingerprint side key in the shell of the whole machine.
Still further, the fingerprint side key can be along the activity of pilot hole direction in the complete machine casing.
Further, the upper surface of the sealing ring is provided with a first sealing glue groove, a first sealing glue is arranged in the first sealing glue groove, the contact surface of the fingerprint identification chip and the sealing ring is sealed, and the first sealing glue climbs to the appearance edge of the fingerprint identification chip by means of tension.
Furthermore, a second glue sealing groove is formed in the lower surface of the sealing ring, second glue sealing glue is arranged in the second glue sealing groove, the contact surface of the sealing ring and the first hard circuit board is sealed, and the second glue sealing glue climbs to the appearance edge of the first hard circuit board by means of tension.
And meanwhile, the sealing edge is pressed to enable the sealing ring to be sunk into the groove of the step of the first hard circuit board, so that sealing is realized, and the waterproof and dustproof effects are achieved. The sealing ring can also be used as a stabilizing component to keep the fingerprint side key balanced during working and maintain stable form.
Preferably, the material of sealing washer is silica gel.
Preferably, the edge of the decorative layer can be arranged into an arc shape, so that the skin is prevented from being cut when the decorative layer is used, and the decorative layer has better hand feeling.
Compared with the prior art, the utility model discloses a set up the sealing washer in the recess, set up first glue sealing groove and second glue sealing groove on sealing washer upper surface and lower surface, set up first sealant and second sealant in first glue sealing groove and second glue sealing groove again, limited the inside welding clearance of fingerprint side key and the outside overflow of bottom filling glue in the encapsulating hole, obtained dual sealed effect, further promoted waterproof dustproof function; meanwhile, the sealing edge arranged on the sealing ring can enable the fingerprint side key to be tightly and stably installed in the whole machine shell, and the fingerprint side key integrates fingerprint identification and light touch switch and has excellent waterproof and dustproof functions.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below.
FIG. 1 is an overall right side view of one embodiment of the fingerprint side key of the present application;
FIG. 2 is an overall elevation view of one embodiment of a fingerprint side key of the present application;
FIG. 3 is an overall rear view of one embodiment of the fingerprint side key of the present application;
FIG. 4 is a front view (a) and a right side view (b) of a first rigid circuit board in one embodiment of a fingerprint side key of the present application;
FIG. 5 is a front view (a) and a right side view (b) of a FPC according to an embodiment of the present application;
FIG. 6 is a front view (a) and a right side view (b) of a second rigid circuit board in one embodiment of a fingerprint side key of the present application;
fig. 7 is a front view (a) and a right side view (b) of a first rigid circuit board, a flexible circuit board and a second rigid circuit board in an embodiment of a fingerprint side key of the present application;
FIG. 8 is a front view (a) and a right side view (b) of a seal ring in a fingerprint side key embodiment of the present application;
FIG. 9 is a schematic view of the assembly of the fingerprint side key embodiment of the present application;
the touch type fingerprint identification device comprises a decorative layer 1, a decorative layer 2, a fingerprint identification chip 3, a first hard circuit board 31, a first hard circuit board step 32, a first hard circuit board outline edge 33, a first connecting pad 331, a welding gap 4, a flexible circuit board 5, a second hard circuit board 6, a touch switch 7, a sealing ring 71, a first glue sealing groove 72, a second glue sealing groove 73, a sealing edge 8, a groove 101, bottom filling glue 102, first sealing glue 103, second sealing glue 200, a glue filling hole 300, a whole shell 301, an assembling hole 302, the inner surface of the whole shell 400 and a pressing strip.
Detailed Description
In the present invention, the terms "upper side", "upper surface", "lower side", "lower surface", "outer side", "inner side" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in fig. 1 to 9, and are used only for explaining the relative positional relationship between the respective members or components, and the specific mounting orientation of the respective members or components is not particularly limited. Wherein, the left side direction of right side view in the drawing is the upper direction, contains description such as upper surface, upside, and the like, and similarly, the right side direction of right side view in the drawing is the lower direction, contains description such as lower surface, downside.
Also, some of the above terms may be used to indicate other meanings in addition to the orientation or positional relationship. The specific meaning of these terms in the present invention can be understood by those of ordinary skill in the art as appropriate.
Furthermore, the terms "mounted," "disposed," "provided," "connected," and "connected" are to be construed broadly. For example, it may be a fixed connection, a removable connection, or a unitary construction; may be a mechanical connection; may be directly connected, or indirectly connected through intervening media, or may be in communication between two devices, elements or components. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.
Furthermore, the terms "first" and "second" are used primarily to distinguish between different components or elements and are not used to indicate or imply the relative importance or number of the indicated components or elements. "plurality" means two or more unless otherwise specified.
The utility model provides a fingerprint side key, includes flexible circuit board 4, wherein, flexible circuit board 4 upper surface and lower surface are equipped with first stereoplasm circuit board 3 and second stereoplasm circuit board 5 respectively, and 3 upper surfaces of first stereoplasm circuit board are equipped with fingerprint identification chip 2, and 2 upper surfaces of fingerprint identification chip are equipped with decorative layer 1 of silica gel material, and 3 upsides of first stereoplasm circuit board are equipped with first stereoplasm circuit board step 31, and this first stereoplasm circuit board step 31 outside is equipped with sealing washer 7, and 5 lower surfaces of second stereoplasm circuit board are equipped with dabs switch 6.
The utility model discloses a fingerprint side key sets up fingerprint identification chip 2 and dabs switch 6 respectively on first stereoplasm circuit board 3 upper surface and on 5 lower surfaces of second stereoplasm circuit board to through setting up first stereoplasm circuit board step 31 at 3 upsides of first stereoplasm circuit board, set up sealing washer 7 in the 31 outside of first stereoplasm circuit board step, can make fingerprint side key realize collecting fingerprint identification, dabs switch 6 and waterproof dustproof function in an organic whole, fingerprint side key appearance is less, can be applied to cell-phone side fingerprint button.
The upper surface of the first hard circuit board 3 is provided with a first connection pad 33, the fingerprint identification chip 2 is welded on the upper surface of the first hard circuit board 3 through the first connection pad 33, and a welding gap 331 is formed between the fingerprint identification chip 2 and the upper surface of the first hard circuit board 3. The first connection pads 33 are formed by exposure, development and etching processes, and this structure provides a high positional accuracy between the fingerprint recognition chip 2 and the first connection pads 33.
The fingerprint side key is further provided with a glue filling hole 200 penetrating through the first hard circuit board 3, the flexible circuit board 4 and the second hard circuit board 5, the glue filling hole 200 is communicated with the welding gap 331, and underfill 101 is arranged in the glue filling hole 200 and the welding gap 331.
The outline of the fingerprint identification chip 2 and the outline of the first hard circuit board 3 are larger than the outline of the first hard circuit board step 31, a groove 8 is formed between the outer side of the first hard circuit board step 31 and the outer side of the welding gap 331, and a sealing ring 7 is arranged at the position of the groove 8. The seal ring 7 seals the groove 8 formed outside the first hard circuit board step 31 and outside the solder gap 331, and restricts the underfill 101 from overflowing outward.
The whole machine shell 300 is provided with an assembly hole 301 which has the same shape with the fingerprint identification chip 2 and is slightly larger than the fingerprint identification chip 2, the fingerprint identification chip 2 penetrates through the assembly hole 301 from the inside to the outside of the whole machine shell 300, and the sealing ring 7 is contacted with the inner surface 302 of the whole machine shell. In addition, the outline of the first hard circuit board 3 is larger than the outline of the fingerprint identification chip 2, and the first hard circuit board 3 can be used as a hanging table for assembling the whole machine and limits the fingerprint side key in the whole machine shell 300. The fingerprint side key can move in the direction of the assembly hole 301 in the whole machine shell 300.
The lower surface of the sealing ring 7 is provided with a second glue sealing groove 72, a second sealant 103 is arranged in the second glue sealing groove 72 to seal the contact surface of the sealing ring 7 and the first hard circuit board 3, and the second sealant 103 climbs to the outline edge 32 of the first hard circuit board by means of tension.
The upper surface of the outer side of the sealing ring 7 is provided with a sealing edge 73, when the fingerprint side key is assembled, the sealing edge 73 of the sealing ring 7 is pressed by the pressing strip 400, so that the sealing edge 73 is in close contact with the whole shell 300, and meanwhile, the sealing ring 7 is sunk into the groove 8 of the first hard circuit board step 31 by pressing the sealing edge 73, so that sealing is realized, and the waterproof and dustproof effects are achieved. The seal ring 7 can also be used as a stabilizing component to keep the fingerprint side key balanced during work and maintain stable form.
This embodiment is only for easy understanding the utility model discloses a technical scheme does not constitute the restriction to the protection scope of the utility model, all do not break away from the utility model discloses technical scheme's content or basis the utility model discloses a technical entity all still belongs to the utility model discloses within the protection scope to any simple modification, the equivalent change and the decoration of doing to above scheme.
Claims (8)
1. The utility model provides a fingerprint side key, includes the flexible circuit board, its characterized in that, flexible circuit board upper surface and lower surface are equipped with first stereoplasm circuit board and second stereoplasm circuit board respectively, first stereoplasm circuit board upper surface is equipped with the fingerprint identification chip, and the fingerprint identification chip upper surface is equipped with the decorative layer, and first stereoplasm circuit board upside is equipped with first stereoplasm circuit board step, and this first stereoplasm circuit board step outside is equipped with the sealing washer, second stereoplasm circuit board lower surface is equipped with dabs the switch.
2. The fingerprint side key of claim 1, wherein the first hard circuit board has a first connection pad on an upper surface thereof, the fingerprint identification chip is soldered to the first hard circuit board via the first connection pad, and a solder gap is formed between the fingerprint identification chip and the first hard circuit board.
3. The fingerprint side key according to claim 2, wherein the fingerprint side key further comprises a glue filling hole penetrating through the first hard circuit board, the flexible circuit board and the second hard circuit board, the glue filling hole is communicated with the welding gap, and underfill is disposed in the glue filling hole and the welding gap.
4. The fingerprint side key according to claim 3, wherein the outline of the fingerprint identification chip and the outline of the first hard circuit board are larger than the outline of the first hard circuit board step, a groove is formed on the outer side of the first hard circuit board step and the outer side of the welding gap, and the sealing ring is arranged at the groove.
5. The side key of claim 1, wherein the upper surface of the sealing ring is provided with a first sealant groove, and the first sealant groove is provided with a first sealant for sealing the contact surface between the fingerprint identification chip and the sealing ring.
6. The side key of claim 1, wherein the lower surface of the sealing ring is provided with a second sealant groove, and a second sealant is provided in the second sealant groove for sealing the contact surface between the sealing ring and the first rigid circuit board.
7. The side key of a fingerprint according to claim 1, wherein said seal ring has a sealing edge on the upper surface of the outer side.
8. The side key of claim 1, wherein the sealing ring is made of silicone.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020384559.XU CN211718905U (en) | 2020-03-24 | 2020-03-24 | Fingerprint side key |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020384559.XU CN211718905U (en) | 2020-03-24 | 2020-03-24 | Fingerprint side key |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211718905U true CN211718905U (en) | 2020-10-20 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020384559.XU Active CN211718905U (en) | 2020-03-24 | 2020-03-24 | Fingerprint side key |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211718905U (en) |
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2020
- 2020-03-24 CN CN202020384559.XU patent/CN211718905U/en active Active
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