CN211238054U - Keyboard circuit board - Google Patents
Keyboard circuit board Download PDFInfo
- Publication number
- CN211238054U CN211238054U CN201922208913.3U CN201922208913U CN211238054U CN 211238054 U CN211238054 U CN 211238054U CN 201922208913 U CN201922208913 U CN 201922208913U CN 211238054 U CN211238054 U CN 211238054U
- Authority
- CN
- China
- Prior art keywords
- circuit board
- layer
- substrate layer
- keyboard
- adhesive
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Abstract
The utility model discloses a keyboard circuit board, the circuit board includes upper substrate layer, middle level substrate layer and lower floor's substrate layer, all is equipped with upper adhesive layer and lower floor's adhesive layer between each substrate layer. The circuit board further comprises a back glue area, and the back glue area is located in the middle of the edge of the back of the circuit board. The back glue area is a groove which is inwards concave, a double-sided adhesive tape is arranged in the groove, and the double-sided adhesive tape is used for adhering the circuit board to the keyboard bottom plate. The utility model can reduce the thickness of the keyboard circuit board and improve the function and hand feeling of the character keys; after the tail end of the flexible circuit board is reversely folded, the lower layer and the spacer layer cannot be spread; be equipped with the protection film between double faced adhesive tape and the circuit layer, can protect the keyboard circuit.
Description
Technical Field
The utility model relates to a keyboard circuit board.
Background
With the progress of the technology level, the current keyboards are all developed towards light and thin, and the light and thin keyboards have thinner thickness and lighter weight, so that better user experience can be provided. The lower edge of the back of the conventional keyboard circuit board is provided with a back adhesive area for adhering the circuit board and the bottom plate. And the keyboard line needs 180 anti-book, then fixes the keyboard bottom with the double faced adhesive tape with the gum district, and this kind of design makes the thickness of keyboard lower limb great, and the influence is used and is felt, and the regional stress concentration of anti-book simultaneously, and the double faced adhesive tape stickness is stronger, can produce the serious problems such as substrate layer fracture of circuit board.
SUMMERY OF THE UTILITY MODEL
Utility model purpose: the utility model aims at providing a keyboard circuit board that thickness is thin, structural strength is high to solve above-mentioned problem.
The technical scheme is as follows: the utility model discloses a keyboard circuit board, the circuit board includes upper substrate layer, middle level substrate layer and lower floor's substrate layer, all is equipped with upper adhesive layer and lower floor's adhesive layer between each substrate layer.
The circuit board further comprises a back glue area, and the back glue area is located in the middle of the edge of the back of the circuit board; the back glue area is a groove which is inwards concave, a double-sided adhesive tape is arranged in the groove, and the double-sided adhesive tape is used for adhering the circuit board to the keyboard bottom plate.
When the lower edge of the back adhesive area is overlapped with the lower edge of the circuit board, the groove of the back adhesive area is opened towards the lower edge of the circuit board.
The depth of the gum area is equal to the sum of the thicknesses of the lower-layer base material layer and the lower-layer adhesive layer.
The depth of the gum area is equal to the sum of the thickness of the lower substrate layer, the lower adhesive layer, the middle substrate layer and the upper adhesive.
And a protective film is arranged between the back glue area and the upper base material layer.
The thickness of the double-sided adhesive tape is not less than the depth of the back adhesive area.
Has the advantages that: compared with the prior art, the utility model has the advantages of it is as follows showing: the double faced adhesive tape of the utility model is directly pasted in the groove of the back adhesive area, which can reduce the thickness of the area and improve the function and hand feeling of the character key in the area; after the tail end of the flexible circuit board is reversely folded, the lower layer and the spacer layer cannot be spread; be equipped with the protection film between double faced adhesive tape and the circuit layer, can protect the keyboard circuit.
Drawings
FIG. 1 is a schematic structural diagram of a keyboard circuit board;
FIG. 2 is a cross-sectional view of a conventional keyboard circuit board back glue area;
FIG. 3 is a schematic view of the structure of the section No. 1 of the back glue area of the present invention;
FIG. 4 is a schematic view of the structure of the No. 2 section of the back glue area of the present invention;
Detailed Description
The technical solution of the present invention will be further explained with reference to the accompanying drawings.
As shown in fig. 2, the conventional circuit board includes an upper substrate layer 3, a middle substrate layer 5, and a lower substrate layer 7 from top to bottom, an upper adhesive layer 4 and a lower adhesive layer 6 are disposed between the substrate layers, and a double-sided adhesive tape is disposed at the bottom (i.e., the back of the keyboard circuit board). The substrate layer can be made of PET material. The keyboard circuit is arranged on the lower surface of the upper substrate layer 3. The thickness of this kind of design messenger keyboard lower limb is great, influences and uses and feels, and reverse regional stress concentration of rolling over simultaneously, and the double faced adhesive tape stickness is stronger, can produce the substrate layer fracture scheduling serious problem of circuit board.
The utility model discloses a keyboard circuit board 1 still includes gum district 2, and this gum district is located circuit board back edge middle part, as shown in fig. 1. The back glue area 2 is an inward concave groove, and when the lower edge of the back glue area 2 is overlapped with the lower edge of the circuit board, the groove of the back glue area is opened towards the lower edge of the circuit board. Be equipped with double faced adhesive tape 8 in the gum district 2, this double faced adhesive tape is used for pasting the circuit board to the keyboard bottom plate, and double faced adhesive tape thickness is not less than the gum district degree of depth.
The depth of the adhesive backed zone 2 is equal to the sum of the thicknesses of the lower substrate layer 7 and the lower adhesive layer 6, as shown in fig. 3. The double-sided adhesive tape 8 is arranged in the back adhesive area, and the lower edge of the double-sided adhesive tape does not exceed the lower edge of the circuit board 1.
The depth of the adhesive backed area 2 can also be equal to the sum of the thickness of the lower substrate layer 7, the lower adhesive layer 6, the middle substrate layer 5 and the upper adhesive 4, as shown in fig. 4. Be equipped with protection 9 between gum district 2 and upper substrate layer 3, can protect the circuit layer that is located upper substrate layer 3 lower surface. The double-sided adhesive tape 8 is arranged in the back adhesive area, and the lower edge of the double-sided adhesive tape does not exceed the lower edge of the circuit board 1.
The double faced adhesive tape of the utility model is directly pasted in the groove of the back adhesive area, which can reduce the thickness of the area and improve the function and hand feeling of the character key in the area; after the tail end of the flexible circuit board is reversely folded, the lower layer and the spacer layer cannot be spread; be equipped with the protection film between double faced adhesive tape and the circuit layer, can protect the keyboard circuit.
Claims (6)
1. A keyboard circuit board comprises an upper substrate layer, a middle substrate layer and a lower substrate layer, wherein an upper adhesive layer and a lower adhesive layer are arranged between the substrate layers; the back glue area is a groove which is inwards concave, a double-sided adhesive tape is arranged in the groove, and the double-sided adhesive tape is used for adhering the circuit board to the keyboard bottom plate.
2. The keyboard circuit board of claim 1, wherein the adhesive backed area recess opens toward the lower edge of the circuit board when the lower edge of the adhesive backed area coincides with the lower edge of the circuit board.
3. The keyboard wiring board of claim 1, wherein the depth of the adhesive backed area is equal to the sum of the thicknesses of the lower substrate layer and the lower adhesive layer.
4. The keyboard wiring board of claim 1, wherein the depth of the adhesive backed region is equal to the sum of the thickness of the lower substrate layer, the lower adhesive layer, the middle substrate layer and the upper adhesive.
5. The keyboard circuit board of claim 4, wherein a protective film is disposed between the adhesive backed area and the upper substrate layer.
6. The keyboard circuit board of claim 1, wherein the double-sided adhesive thickness is not less than the adhesive area depth.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922208913.3U CN211238054U (en) | 2019-12-11 | 2019-12-11 | Keyboard circuit board |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922208913.3U CN211238054U (en) | 2019-12-11 | 2019-12-11 | Keyboard circuit board |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211238054U true CN211238054U (en) | 2020-08-11 |
Family
ID=71941125
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922208913.3U Active CN211238054U (en) | 2019-12-11 | 2019-12-11 | Keyboard circuit board |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211238054U (en) |
-
2019
- 2019-12-11 CN CN201922208913.3U patent/CN211238054U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| KR860003571A (en) | Reattachment prevention attachment | |
| TW200745923A (en) | Transparent conductive laminate body and touch panel equipped with above | |
| WO2001008033A3 (en) | Computer generation of documents using layout elements and content elements | |
| ATE367265T1 (en) | DIRECT LAMINATED BOARD | |
| AU2003218043A1 (en) | Dual density foam core sports board | |
| WO2001096488A3 (en) | Adhesive compositions and constructions with improved cutting performance | |
| CN113643614A (en) | Flexible display cover plate assembly, manufacturing method thereof, display panel and display device | |
| CN210040338U (en) | Battery fixing structure and mobile terminal | |
| CN211238054U (en) | Keyboard circuit board | |
| CN207028416U (en) | A kind of explosion-proof lucite safeguard film for cellular phone of hot bending | |
| CN213752192U (en) | Broken magnetic protection structure of nanocrystalline magnetic conduction sheet and multilayer nanocrystalline magnetic conduction sheet | |
| CN113345331A (en) | Display module | |
| CN208038370U (en) | A kind of Antiradiation mobile phone film | |
| CN207772553U (en) | A kind of Mobile phone film easy to operation | |
| JP4417425B1 (en) | Slip sheet | |
| JP4494993B2 (en) | Double-sided concealment label | |
| CN213878078U (en) | Wireless signal enhancement chip pastes | |
| CN216837771U (en) | Antistatic protective film | |
| CN210259524U (en) | Display screen protection film and mobile terminal | |
| CN215712763U (en) | Curved surface screen cell-phone protection film | |
| CN218122872U (en) | Waterproof and anti-abrasion sticker | |
| CN212519559U (en) | Flexible circuit board protection film | |
| CN209854043U (en) | Foam rubber component | |
| CN212387992U (en) | Detachable tempering film | |
| CN213798608U (en) | Glue running structure of AB glue in curved surface tempering film |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |