CN209861257U

CN209861257U - Ultrathin keyboard film circuit board

Info

Publication number: CN209861257U
Application number: CN201920239124.3U
Authority: CN
Inventors: 邹伟民
Original assignee: Chongqing Yingzhi Electronics Co Ltd
Current assignee: Chongqing Yingzhi Electronics Co Ltd
Priority date: 2019-02-25
Filing date: 2019-02-25
Publication date: 2019-12-27
Anticipated expiration: 2029-02-25

Abstract

The utility model discloses an ultra-thin keyboard film circuit board, which comprises a keyboard bottom plate, a circuit board layer, a lead, a gasket insulating layer and a pressing film layer are sequentially arranged on the keyboard bottom plate from bottom to top, the top of the pressing film layer is provided with a plurality of key marks, a pressing cavity is arranged at the position of the gasket insulating layer corresponding to the key marks, an elastic body is also arranged in the pressing cavity, the elastic body is clamped between the lead and the pressing film layer, an adhesive pad is arranged at the position of the bottom of the pressing film layer, which is positioned in the pressing cavity, a conductive block is arranged on the adhesive pad, the lead is divided into a first circuit and a second circuit which are not communicated with each other, the first circuit and the second circuit are in an off state in a natural state, the first circuit and the second circuit are communicated with each other through the conductive block in a conductive manner in the pressing state, the total thickness of the keyboard, the volume of whole keyboard has been reduced, simple structure, low in production cost, and the elastic body has also increased the resilience force of keyboard, increase of service life.

Description

Ultrathin keyboard film circuit board

Technical Field

The utility model relates to a film keyboard design technical field, especially a film circuit board that save material, with low costs and resilience are good.

Background

With the development of ultrathin notebook keyboards, the requirements on the height and the stroke of the keyboard are lower and lower, the existing common circuit board structure is mostly an independent structure, the thickness of the circuit board is limited, and the thickness cannot be further reduced. The existing circuit board is generally formed by 3 layers of PET plastics and glue, circuits are respectively printed on the upper layer of PET plastics and the lower layer of PET plastics and are separated by a middle layer spacer, and a conducting block (PAD) of the upper layer and the lower layer are touched under stress to complete the action of a key switch; however, the conventional circuit board structure is limited by the thickness of single-layer PET plastic, the total thickness cannot be further reduced, otherwise, the thickness of the PET plastic is forcibly reduced, the production yield is extremely low, the product quality is not guaranteed, and batch production cannot be realized; in addition, after the PET plastic is touched and pressed for many times, the elasticity of the PET plastic is reduced, the resilience force is insufficient, and the PET plastic is easy to touch by mistake.

SUMMERY OF THE UTILITY MODEL

In view of the above-mentioned defects of the prior art, the utility model provides an ultra-thin keyboard film circuit board that save material, with low costs and resilience are good.

In order to achieve the above purpose, the utility model provides an ultra-thin keyboard film 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 a pressing film layer from bottom to top, the top of the pressing film layer is provided with a plurality of key marks, a pressing cavity is arranged at the position of the gasket insulating layer corresponding to the key mark, an elastic body is also arranged in the pressing cavity and is clamped between the lead and the pressing film layer, the bottom of the pressing film layer is provided with a viscose pad at the position of the pressing cavity, the viscose pad is provided with a conductive block, the lead is divided into a first line and a second line which are not communicated with each other, in a natural state, the first line and the second line are in an open state, and in a pressed state, the first line and the second line are conducted through the conductive block.

Further, the elastic body is annular and surrounds the adhesive pad.

Furthermore, the first line and the second line which are positioned below the key mark are single and are arranged oppositely in the axial direction.

Furthermore, the rear end of the first circuit is provided with a plurality of first electric connection ends connected in parallel, the rear end of the second circuit is provided with a plurality of second electric connection ends connected in parallel, and the first electric connection ends and the second electric connection ends are arranged in a staggered mode.

The utility model has the advantages that: the utility model discloses an ultra-thin keyboard film circuit board has reduced the gross thickness of keyboard circuit board through the laminated structure design, has reduced the volume of whole keyboard, simple structure, low in production cost, especially the addition of elastic body has also increased the resilience force of keyboard, increase of service life.

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, an ultrathin keyboard film circuit board comprises a keyboard base plate 1, wherein a circuit board layer 2, a lead, a gasket insulating layer 3 and a pressing film layer 4 are sequentially arranged on the keyboard base plate 1 from bottom to top, the top of the pressing film layer 4 is provided with a plurality of key marks, a pressing cavity 5 is arranged at the position of the gasket insulating layer 3 corresponding to the key mark, and in the embodiment, an elastic body 12 is also arranged in the pressing cavity 5, the elastic body 12 is clamped between the lead and the pressing film layer 4, the elastic body 12 is annular and surrounds the adhesive pad 6, the section of the elastic body 12 can be round, triangular or square and the like, the elastic body 12 is added to increase the resilience of the keyboard, prolong the service life of the keyboard and improve the pressing hand feeling; the bottom of pressing thin layer 4 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 the second circuit 9 that each other does not communicate, under natural state, first circuit 8 and second circuit 9 are the off-state, are pressing down under the state, first circuit 8 and second circuit 9 pass through conducting block 7 switches on, the utility model discloses a laminated structure design has reduced keyboard circuit board's gross thickness, has reduced the volume of whole keyboard, simple structure, low in production cost.

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, first circuit 8 and second circuit 9 are through printing, etching or thunder carving on circuit board layer 2, conducting block 7 with it is fixed that the adhesive pad 6 pastes through glue, keyboard floor 1, circuit board layer 2, gasket insulating layer 3 and press the thin layer 4 to paste fixedly through glue, simple structure, low in production cost.

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

1. The ultrathin keyboard film circuit board is characterized by comprising a keyboard base plate (1), wherein a circuit board layer (2), a wire, a gasket insulating layer (3) and a pressing film 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 pressing film layer (4), a pressing cavity (5) is arranged at the position, corresponding to the key marks, of the gasket insulating layer (3), an elastic body (12) is further arranged in the pressing cavity (5), the elastic body (12) is clamped between the wire and the pressing film layer (4), an adhesive pad (6) is arranged at the position, located in the pressing cavity (5), of the bottom of the pressing film layer (4), a block (7) is arranged on the adhesive pad (6), and the wire is divided into a first line (8) and a second line (9) which are not communicated with each other, in a natural state, the first line (8) and the second line (9) are in an open state, and in a pressed state, the first line (8) and the second line (9) are conducted through the conductive block (7).

2. The ultra-thin keyboard film circuit board of claim 1, characterized in that the elastic body (12) is ring-shaped and surrounds the adhesive pad (6).

3. The ultrathin keyboard film circuit board of claim 1, characterized in that the first circuit (8) and the second circuit (9) under the key identification are both single and axially opposite.

4. The ultrathin keyboard film circuit board of claim 1, characterized in that the back end of the first line (8) is provided with a plurality of parallel first electrical connection ends (10), the back end of the second line (9) is provided with a plurality of parallel second electrical connection ends (11), and the first electrical connection ends (10) and the second electrical connection ends (11) are arranged in a staggered manner.