CN217307944U - Keyboard film circuit board capable of prolonging waterproof time - Google Patents

Abstract

The utility model relates to the field of printed circuits, in particular to a keyboard film circuit board capable of prolonging waterproof time, which comprises a circuit board, an operating panel and a keyboard bottom box, wherein the operating panel and the keyboard bottom box are respectively arranged on the upper part and the lower part of the circuit board; the upper surface cover of the circuit board is provided with a silica gel film cover matched with the shape of the circuit board; the keyboard end box is equipped with the storage tank and puts into in order to supply the circuit board, is equipped with dry board between storage tank and the circuit board, and dry board periphery is equipped with the guiding gutter that the round is annular and vertical setting along the storage tank inner wall, and the guiding gutter bottom is equipped with a plurality of wash ports, the outline of guiding gutter and the wall coplane all around of circuit board, the utility model discloses waterproof performance is good and can effectively avoid ponding, and then extension waterproofing time.

Description

Keyboard film circuit board capable of prolonging waterproof time

Technical Field

The utility model relates to a printed circuit field especially relates to a keyboard film circuit board that can prolong waterproof time.

Background

The keyboard is the most common computer input device, and is widely applied to microcomputers and various terminal devices, and computer operators input various instructions and data to the computers through the keyboard to command the work of the computers. The current membrane keyboard is a membrane circuit board, which prints a circuit on a flexible membrane, and contacts on the membrane form contact response by pressing keys; current thin film circuit boards are typically of a three-layer structure comprising an upper wiring film, a lower wiring film, and a spacer layer therebetween. The upper layer circuit film and the lower layer circuit film are respectively printed with corresponding printed circuits, and the upper layer circuit film and the lower layer circuit film are isolated through the middle layer to prevent short circuit.

When the keyboard is used in daily office or study, if liquid such as water on a desktop is carelessly sprayed into the keyboard, a circuit board in the keyboard is short-circuited, so that the keyboard cannot work normally, and after the keyboard enters water, the keyboard is slightly out of order, and a certain part of a host machine can be burnt out.

Therefore, chinese patent CN201920238160.8 discloses a waterproof keyboard circuit board, including the keyboard bottom plate, last supreme circuit board layer that has set gradually by lower on the keyboard bottom plate, the wire, gasket insulating layer and elasticity press the layer, the keyboard bottom plate, circuit board layer, the wire, the outer cladding of gasket insulating layer and elasticity press the layer has transparent waterproof coating film, the whole keyboard circuit board of transparent waterproof coating film cladding plays waterproof effect, even transparent waterproof coating film damage still have elasticity press the layer to carry out the secondary waterproof, first waterproof circle, second waterproof circle and third waterproof circle carry out waterproof alone to every button, it is dustproof. The waterproof keyboard circuit board designed by the scheme has the advantages of simple structure, good waterproof and dustproof effects and capability of improving the waterproof grade.

Although above-mentioned scheme has simple structure, and is waterproof, dustproof effectual, improves the advantage of waterproof grade, the keyboard is intake the back sometimes, and ponding can appear in certain position on the keyboard, and this will cause to exist to neglect the ponding problem to the interim processing that the keyboard intake, and then can appear the short circuit when leading to inserting the keyboard into the circuit once more, leads to the keyboard to damage, leads to bigger economic loss even when serious.

Therefore, those skilled in the art are devoted to develop a keyboard thin film circuit board which has good waterproof performance and can effectively avoid water accumulation and prolong the waterproof time.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a can prolong keyboard film circuit board of waterproof time, waterproof performance is good and can effectively avoid ponding.

In order to achieve the purpose, the utility model provides a keyboard film circuit board capable of prolonging the waterproof time, which comprises a circuit board, an operation panel and a keyboard bottom box, wherein the operation panel and the keyboard bottom box are respectively arranged on the upper part and the lower part of the circuit board; the upper surface cover of the circuit board is provided with a silica gel film cover matched with the shape of the circuit board; the keyboard bottom box is provided with a containing groove for placing a circuit board, a drying plate is arranged between the containing groove and the circuit board, a circle of guide grooves which are annular and vertically arranged along the inner wall of the containing groove are arranged on the periphery of the drying plate, a plurality of drain holes are arranged at the bottom of the guide grooves, and the outline of the guide grooves is coplanar with the peripheral wall of the circuit board.

Wherein, the periphery of silica gel film cover extends downwards and forms the annular turn-ups of round for wrap up around the circuit board.

By adopting the technical scheme, the periphery of the circuit board is wrapped by the annular flanging, so that the waterproof effect is better, and the waterproof time is prolonged.

Wherein, the lower end of the flanging is arranged in the diversion trench.

By adopting the technical scheme, the lower end of the flanging is arranged in the flow guide groove, and when the keyboard is fed with water, the water flows into the flow guide groove along the flanging at the lower end of the silica gel film cover, so that the water can be effectively prevented from directly entering the circuit board.

The drying plate is internally of a cavity structure, the upper end face and the peripheral wall of the drying plate are provided with a plurality of through holes, and an active carbon drying block is arranged in the cavity structure of the drying plate.

Adopt above-mentioned technical scheme, play the drying action through setting up the dry piece of active carbon and a plurality of through-hole, simple structure and cost are lower, can effectual problem and the dampproofing of handling ponding, and then prolong waterproof time.

Wherein, the lower terminal surface of drying plate is equipped with the bottom of dismantling the connection.

By adopting the technical scheme, the active carbon drying block can be replaced through the detachably connected bottom cover.

Wherein, four corners of the lower end face of the keyboard bottom box are respectively provided with a support.

By adopting the technical scheme, the support is favorable for quick drainage of the drainage holes.

The top of the keyboard bottom box is provided with a clamping groove for detachably connecting the operation panel with the keyboard bottom box.

By adopting the technical scheme, if the keyboard is short-circuited after water enters the keyboard, the keyboard is easy to disassemble, assemble and maintain through the structure.

Wherein, the outer wall around the circuit board is bonded with a waterproof edge through printed waterproof glue.

By adopting the technical scheme, the circuit board is waterproof again, so that the waterproof time is prolonged.

Wherein, be equipped with four mounts that set up by the vertical upwards of storage tank bottom surface between guiding gutter and the drying board for four corner settings of the fixed circuit board of installation and mount pad corresponding circuit board.

By adopting the technical scheme, the circuit board is installed by utilizing the four installation bases, the structure is simple, and the installation is stable.

The utility model provides a keyboard film circuit board that can prolong waterproof time, in the keyboard film circuit board process that uses this can prolong waterproof time, when water turns over to spill to the keyboard, water flows down through operating panel and passes through the silica gel film cover that the circuit board upper surface was covered and is established earlier, and silica gel film cover plays waterproof effect, can effectively avoid water to flow into in the circuit board directly; secondly, the water flowing through the silica gel film cover can be guided downwards by the guide groove in the accommodating groove and is discharged out of the keyboard through the water discharge hole; the drying plate arranged on the bottom surface of the accommodating groove dries a small amount of residual water in the keyboard, so that water accumulation in the keyboard is avoided, and the effect of prolonging the waterproof time can be effectively achieved; the upper layer circuit film, the spacer layer and the lower layer circuit film of the circuit board are bonded in a full-covering manner through a waterproof adhesive layer, so that a secondary waterproof effect is achieved; the utility model discloses waterproof performance is good and can effectively avoid ponding.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Fig. 2 is an enlarged schematic view of a portion a in fig. 1 according to the present invention.

Fig. 3 is a schematic structural diagram of the keyboard bottom case of the present invention.

Reference numerals in the drawings of the specification include: the keyboard comprises an operation panel 1, a silica gel film cover 2, a flanging 21, a circuit board 3, an upper layer circuit film 31, a lower layer circuit film 32, a separator layer 33, a waterproof adhesive layer 34, a waterproof edge 35, a keyboard bottom box 4, a containing groove 41, a flow guide groove 42, a water discharge hole 43, a support 44, a clamping groove 45, a mounting seat 46, a drying plate 5 and a through hole 51.

Detailed Description

The present invention will be further described with reference to the accompanying drawings and examples, wherein it is noted that, in the description of the invention, the terms "upper", "lower", "left", "right", "inner", "outer", etc. indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular manner, and therefore should not be construed as limiting the present invention. The terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

As shown in fig. 1 to 3, a keyboard film circuit board capable of prolonging waterproof time comprises a circuit board 3, and an operation panel 1 and a keyboard bottom case 4 respectively arranged on the upper and lower sides of the circuit board 3, wherein the circuit board 3 comprises an upper layer circuit film 31, a spacer layer 33 and a lower layer circuit film 32 which are sequentially and completely covered and bonded by a waterproof adhesive layer 34 from top to bottom; the upper surface cover of the circuit board 3 is provided with a silica gel film cover 2 matched with the circuit board 3 in shape; the keyboard bottom case 4 is provided with a containing groove 41 for placing the circuit board 3, a drying plate 5 is arranged between the containing groove 41 and the circuit board 3, a circle of guide grooves 42 which are annular and vertically arranged along the inner wall of the containing groove 41 are arranged on the periphery of the drying plate 5, a plurality of drain holes 43 are arranged at the bottom of the guide grooves 42, and the outline of the guide grooves 42 is coplanar with the peripheral wall of the circuit board 3.

In this embodiment, the utility model provides a keyboard film circuit board that can prolong waterproof time, in the keyboard film circuit board in-process that uses this can prolong waterproof time, when water turns over to be splashed to the keyboard, water flows down through operating panel and covers the silica gel film cover that establishes through the circuit board upper surface earlier, silica gel film cover plays waterproof effect, can effectively avoid water to flow directly into the circuit board, specifically, the silica gel film covers and is equipped with the hole structure of stepping down in order to supply the contact potential contact of ware component; secondly, the water flowing through the silica gel film cover can be guided downwards by the guide groove in the accommodating groove and is discharged out of the keyboard through the water discharge hole; the drying plate arranged on the bottom surface of the accommodating groove dries a small amount of residual water in the keyboard, so that water accumulation in the keyboard is avoided, and the effect of prolonging the waterproof time can be effectively achieved; the upper layer circuit film, the spacer layer and the lower layer circuit film of the circuit board are bonded in a full-covering manner through a waterproof adhesive layer, so that a secondary waterproof effect is achieved; the utility model discloses waterproof performance is good and can effectively avoid ponding.

Furthermore, the periphery of the silica gel film cover 2 extends downwards to form a ring-shaped flanging 21 for wrapping the periphery of the circuit board 3.

The lower end of the flanging 21 is arranged in the flow guide groove 42.

In the embodiment, the periphery of the circuit board is wrapped by the annular flanging, so that the waterproof effect is better, and the waterproof time is prolonged; the lower end of the flanging is arranged in the flow guide groove, and when water enters the keyboard, the water flows into the flow guide groove along the flanging at the lower end of the silica gel film cover, so that the water can be effectively prevented from directly entering the circuit board.

Further, the inside cavity structure that is of drying plate 5, the up end of drying plate 5 and wall all around are equipped with a plurality of through-holes 51, are provided with the dry piece of active carbon in the cavity structure of drying plate 5.

The lower end face of the drying plate 5 is provided with a detachably connected bottom cover.

In the embodiment, the active carbon drying block and the through holes are arranged to play a drying role, so that the structure is simple, the cost is low, the problem of water accumulation can be effectively solved, moisture can be prevented, and the waterproof time can be prolonged; the active carbon drying block can be replaced through the detachably connected bottom cover.

Further, four corners of the lower end surface of the keyboard bottom case 4 are respectively provided with a support 44.

In the embodiment, the support seat is arranged to facilitate quick drainage of the drainage hole.

Furthermore, a clamping groove 45 is arranged on the top of the keyboard bottom box 4, so that the operation panel 1 can be detachably connected with the keyboard bottom box 4.

In the embodiment, if the keyboard is short-circuited after water enters the keyboard, the keyboard is easy to disassemble, assemble and maintain through the structure.

Furthermore, the outer wall around the circuit board 3 is bonded with a waterproof edge 35 through printed waterproof glue.

In this embodiment, the wiring board is waterproofed again, and the waterproofing time is further prolonged.

Further, four installation bases 46 which are vertically and upwardly arranged from the bottom surface of the accommodating groove 41 are arranged between the diversion groove 42 and the drying plate 5 and used for installing and fixing the circuit board 3, and the installation bases are arranged corresponding to four corners of the circuit board 3.

In the embodiment, the circuit board is installed by using four installation bases, so that the structure is simple, and the installation is stable.

The foregoing has described in detail preferred embodiments of the present invention. It should be understood that numerous modifications and variations can be devised by those skilled in the art in light of the teachings of the present invention without undue experimentation. Therefore, the technical solutions that can be obtained by a person skilled in the art through logic analysis, reasoning or limited experiments based on the prior art according to the concepts of the present invention should be within the scope of protection defined by the claims.

Claims (9)

1. A keyboard film circuit board capable of prolonging waterproof time comprises a circuit board, an operation panel and a keyboard bottom box, wherein the operation panel and the keyboard bottom box are respectively arranged on the upper side and the lower side of the circuit board; the circuit board is characterized in that the upper surface cover of the circuit board is provided with a silica gel film cover matched with the shape of the circuit board; the keyboard bottom box is provided with a containing groove for placing a circuit board, a drying plate is arranged between the containing groove and the circuit board, a circle of guide grooves which are annular and vertically arranged along the inner wall of the containing groove are arranged on the periphery of the drying plate, a plurality of drain holes are arranged at the bottom of the guide grooves, and the outline of the guide grooves is coplanar with the peripheral wall of the circuit board.

2. The keyboard film circuit board capable of prolonging waterproof time of claim 1, wherein the periphery of the silica gel film cover extends downwards to form a ring-shaped flanging for wrapping the periphery of the circuit board.

3. The keyboard film circuit board capable of prolonging the waterproof time according to claim 2, wherein the lower end of the flange is disposed in the guiding groove.

4. The film circuit board for keyboard capable of extending waterproof time of claim 1, wherein the drying board has a cavity structure inside, the upper end face and the peripheral wall of the drying board are provided with a plurality of through holes, and the cavity structure of the drying board is provided with an active carbon drying block.

5. The keyboard film circuit board capable of prolonging waterproof time according to claim 4, wherein the lower end face of the drying plate is provided with a detachably connected bottom cover.

6. The keyboard film circuit board capable of prolonging waterproof time according to claim 1, wherein four corners of the lower end face of the keyboard bottom case are respectively provided with a support.

7. The keyboard film circuit board capable of prolonging waterproof time according to claim 1, wherein a slot is provided on the top of the keyboard bottom case for detachably connecting the operation panel with the keyboard bottom case.

8. The film keyboard circuit board capable of extending waterproof time according to claim 1, wherein the peripheral outer wall of the circuit board is bonded with a waterproof edge cover by printing waterproof glue.

9. The keyboard film circuit board capable of prolonging waterproof time according to claim 1, wherein four mounting seats are arranged between the diversion trench and the drying plate, the four mounting seats are vertically arranged upwards from the bottom surface of the accommodating trench, and are used for mounting and fixing the circuit board and the mounting seats are arranged corresponding to four corners of the circuit board.

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