CN209861256U - Waterproof keyboard circuit board - Google Patents

Abstract

The utility model discloses a waterproof keyboard circuit board, including the keyboard floor, keyboard floor is last by supreme circuit board layer that has set gradually down, the wire, gasket insulating layer and elasticity are according to the layer, the keyboard floor, circuit board layer, the wire, the outer cladding of gasket insulating layer and elasticity are according to 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 also has elasticity to press the layer to carry out the secondary waterproof in addition, first waterproof circle, waterproof circle of second and third waterproof circle carry out water alone to every button, dustproof, moreover, the steam generator is simple in structure, and is waterproof, dustproof effectual, improve waterproof grade, and the service life of extension product is prolonged.

Description

Waterproof keyboard circuit board

Technical Field

The utility model relates to a waterproof keyboard technical field, especially a waterproof keyboard circuit board that waterproof performance is good.

Background

The membrane keyboard is a computer matched hardware device integrating decoration and functionality, which is popular internationally in recent years, and has beautiful and novel appearance, small volume, light weight and strong sealing performance. The coating has the characteristics of moisture resistance, dust resistance, oil stain resistance, acid and alkali resistance, shock resistance, long service life and the like, and is widely applied to the fields of medical instruments, computer control, digital machine tools and the like. The enhancement film keyboard among the prior art actuates the function and the accuracy is not high, operates inconveniently, and the damage probability of button is high, and inside water and dust got into the film keyboard easily, especially changed into water and damage after the film damage on its surface, in addition through touching many times and pressing back elasticity can descend, the resilience force is not enough, causes the mistake easily and touches, has shortened life.

SUMMERY OF THE UTILITY MODEL

In view of the above-mentioned defect of prior art, the utility model provides a waterproof keyboard circuit board that waterproof performance is good, save material, with low costs and the resilience is good.

In order to achieve the above purpose, the utility model provides a waterproof keyboard circuit board, which comprises a keyboard bottom plate, the keyboard bottom plate is sequentially provided with a circuit board layer, a lead, a gasket insulating layer and an elastic pressing layer from bottom to top, the top of the elastic pressing layer is provided with a plurality of key marks, the conducting wires are communicated after the key marks are pressed, the keyboard bottom plate, the circuit board layer, the lead, the gasket insulating layer and the elastic pressing layer are coated with a transparent waterproof coating film, a pressing cavity is arranged at the position of the gasket insulating layer corresponding to the key mark, a first waterproof ring is clamped between the keyboard bottom plate and the circuit board layer around the pressing cavity, a second waterproof ring is clamped between the circuit board layer and the gasket insulating layer and surrounds the pressing cavity, and a third waterproof ring is arranged between the elastic pressing layer and the gasket insulating layer and surrounds the pressing cavity.

Furthermore, a nano waterproof coating is coated on the surface of the circuit board layer.

Furthermore, the surface of the circuit board layer is coated with epoxy resin waterproof glue.

Furthermore, a viscose pad is arranged at the bottom of the elastic pressing layer and positioned in the pressing cavity, a conductive block is arranged on the viscose pad, the lead is divided into a first line and a second line which are not communicated with each other, the first line and the second line are in a disconnected state in a natural state, and the first line and the second line are communicated through the conductive block in a pressing state.

The utility model has the advantages that: the utility model discloses a waterproof keyboard circuit board, including the keyboard floor, by supreme circuit board layer that has set gradually down on the keyboard floor, the wire, gasket insulating layer and elasticity press the layer, the keyboard floor, 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 has elasticity in addition to press the layer to carry out the secondary waterproof, first waterproof circle, waterproof circle of second and third waterproof circle carry out water alone to every button, it is dustproof, moreover, the steam generator is simple in structure, and the water-proof effects is good, improve waterproof grade, and the service life of the product is prolonged.

Drawings

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

FIG. 2 is a schematic diagram of a first embodiment of the first circuit and the second circuit of the present invention;

fig. 3 is a schematic diagram of a second embodiment of the first circuit and the second circuit of the present invention.

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 waterproof keyboard circuit board comprises a keyboard base plate 1, wherein a circuit board layer 2, a lead, a gasket insulating layer 3 and an elastic pressing layer 4 are sequentially arranged on the keyboard base plate 1 from bottom to top, a plurality of key marks are arranged at the top of the elastic pressing layer 4, the lead is communicated after the key marks are pressed, a transparent waterproof coating film 13 is coated outside the keyboard base plate 1, the circuit board layer 2, the lead, the gasket insulating layer 3 and the elastic pressing layer 4, a pressing cavity 5 is arranged at the position of the gasket insulating layer 3 corresponding to the key marks, a first waterproof ring 14 is clamped between the keyboard base plate 1 and the circuit board layer 2 around the pressing cavity 5, a second waterproof ring 15 is clamped between the circuit board layer 2 and the gasket insulating layer 3 around the pressing cavity 5, and a third waterproof ring 16 is clamped between the elastic pressing layer 4 and the gasket insulating layer 3 around the pressing cavity 5, keyboard floor 1, circuit board layer 2, gasket insulating layer 3 and elasticity are pressed layer 4 and are pasted fixedly through glue, and the whole keyboard line board of transparent waterproof coating film 13 cladding plays waterproof effect, even transparent waterproof coating film 13 damage still has elasticity to press layer 4 to carry out the secondary waterproof in addition, moreover, the steam generator is simple in structure, and is good in waterproof effect, and first waterproof circle 14, waterproof circle 15 of second and waterproof circle 16 of third are waterproof alone, dustproof to every button, improves waterproof grade, extension product life.

In order to further promote the waterproof effect, the surface of the circuit board layer 2 is coated with a nano waterproof coating, or the surface of the circuit board layer 2 is coated with an epoxy resin waterproof adhesive, so that the circuit cannot be damaged even if the circuit board layer is immersed in water, and the circuit board is convenient to repair.

Elasticity is pressed layer 4's bottom and is located the position of pressing chamber 5 is provided with viscose pad 6, be provided with conducting block 7 on the viscose pad 6, the wire divide into first circuit 8 and second circuit 9 that do not communicate each other, under natural state, first circuit 8 and second circuit 9 are the off-state, and under the state of pressing, first circuit 8 and second circuit 9 pass through conducting block 7 switches on, and whole keyboard passes through the overall thickness that the laminated structure design has reduced the keyboard circuit board, and low in production cost can make the product quality obtain the guarantee when producing.

In this embodiment, an elastic body 12 is further disposed in the pressing cavity 5, the elastic body 12 is sandwiched between the conductive wire and the elastic pressing layer 4, the elastic body 12 is annular and surrounds the adhesive pad 6, the cross section of the elastic body 12 can be in various shapes such as a circle, a triangle or a square, and the like, and is determined according to actual requirements, and the addition of the elastic body 12 increases the resilience of the keyboard, prolongs the service life of the keyboard, and improves the pressing hand feeling.

In this embodiment, there are two arrangement embodiments of the first line 8 and the second line 9, and the first embodiment is that the first line 8 and the second line 9 located below the key identifier are both single and are arranged opposite to each other in the axial direction, so that the structure is simple, and the production cost is low; the second kind of implementation does the rear end of first circuit 8 is provided with a plurality of parallelly connected first electricity federation end 10, the rear end of second circuit 9 is provided with a plurality of parallelly connected second electricity federation end 11, first electricity federation end 10 with second electricity federation end 11 is crisscross to be set up, and conducting block 7 has a plurality of contact conductive points with first circuit 8 and second circuit 9 when pressing the keyboard, and the contact is more accurate, sensitive, improves the degree of accuracy and the speed that the keyboard pressed.

In this embodiment, the first circuit 8 and the second circuit 9 are printed, etched or laser-engraved on the circuit board layer 2, and the conductive block 7 is adhered to the adhesive pad 6 through glue, so that the structure is simple and the production cost is low.

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 present teachings without departing from the inventive concepts. 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 (3)

1. The utility model provides a waterproof keyboard circuit board, includes keyboard floor (1), keyboard floor (1) is gone up by supreme circuit board layer (2), wire, gasket insulating layer (3) and the elasticity of having set gradually down and is pressed layer (4), the top that the elasticity pressed layer (4) is provided with a plurality of button sign, presses down behind the button sign wire intercommunication, its characterized in that keyboard floor (1), circuit board layer (2), wire, gasket insulating layer (3) and elasticity press layer (4) outer cladding have transparent waterproof coating film (13) gasket insulating layer (3) with the position that the button sign corresponds is provided with presses chamber (5), center on between keyboard floor (1) and circuit board layer (2) press chamber (5) still the centre gripping and be provided with first waterproof circle (14), center on between circuit board layer (2) and the gasket insulating layer (3) press chamber (5) still the centre gripping and be provided with second waterproof circle (15) And a third waterproof ring (16) is clamped between the elastic pressing layer (4) and the gasket insulating layer (3) and surrounds the pressing cavity (5).

2. The waterproof keyboard circuit board of claim 1, characterized in that the circuit board layer (2) surface is coated with a nano waterproof coating.

3. The waterproof keyboard circuit board of claim 1, characterized in that the surface of the circuit board layer (2) is coated with epoxy waterproof glue.