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CN-122025460-A - Film keyboard key and film keyboard

CN122025460ACN 122025460 ACN122025460 ACN 122025460ACN-122025460-A

Abstract

The invention discloses a film keyboard key, which comprises a key cap, a shaft core, a shaft seat and a silica gel body, wherein the key cap is connected to the upper end of the shaft core, through holes penetrating up and down are formed in the shaft seat, limiting protrusions are formed on two opposite side surfaces of the shaft core, sliding grooves are correspondingly formed in the inner walls of the through holes, the shaft core is inserted into the through holes from the upper side to the lower side of the shaft seat and can axially reciprocate along the through holes, the limiting protrusions are adapted to slide in the sliding grooves, downward limiting is formed by a limiting table at the bottom of the sliding grooves so as to prevent the shaft core from falling out, a silica gel body groove communicated with the through holes is formed in the shaft seat, the silica gel body is contained in the silica gel body groove, when the shaft core is stressed to move downwards, the silica gel body is extruded to generate elastic deformation, and when the shaft core is subjected to external force removal, the silica gel body is elastically reset and drives the shaft core to return to an initial position.

Inventors

  • HU SHIJIN
  • XU BING

Assignees

  • 广东欧希德精密智造科技有限公司

Dates

Publication Date
20260512
Application Date
20260209

Claims (7)

  1. 1. A film keyboard key comprises a key cap, a shaft core, a shaft seat and a silica gel body, wherein the key cap is connected to the upper end of the shaft core, through holes penetrating up and down are formed in the shaft seat, the film keyboard key is characterized in that limiting protrusions are arranged on two opposite side surfaces of the shaft core, sliding grooves are correspondingly formed in the inner walls of the through holes, the shaft core is inserted into the through holes from the upper side of the shaft seat downwards and can axially reciprocate along the through holes, the limiting protrusions are adapted to slide in the sliding grooves, downward limiting is formed by a limiting table at the bottom of the sliding grooves so as to prevent the shaft core from falling out downwards, a silica gel body groove communicated with the through holes is formed in the shaft seat, the silica gel body is contained in the silica gel body groove, when the shaft core is stressed downwards, the silica gel body is extruded to elastically deform, and when external force is removed, the silica gel body elastically resets and drives the shaft core to return to an initial position upwards.
  2. 2. The thin-film keyboard key of claim 1, wherein elastic clamping hooks are further arranged on two opposite side surfaces of the shaft core, clamping tables are arranged on the two opposite side surfaces of the shaft seat, when the shaft core is inserted into the shaft seat through hole, the elastic clamping hooks are extruded by the inner wall of the through hole to deform, when the shaft core moves downwards to the clamping table, the elastic clamping hooks are elastically reset and clamped on the clamping tables, and the clamping tables limit the elastic clamping hooks in the vertical upwards direction.
  3. 3. The thin film keyboard key of claim 2, wherein the upper end of the shaft seat is provided with an avoidance position matched with the elastic clamping hook, and a guide inclined plane inclined towards the inner side direction of the through hole is arranged below the avoidance position.
  4. 4. The membrane keyboard key of claim 3 wherein the outer wall of the shaft core is provided with a plurality of guide ribs, and the guide ribs extend along the axial direction of the through hole.
  5. 5. The thin film keyboard key of claim 4, wherein the top end of the shaft core is provided with a cross core convex part, the bottom end of the key cap is provided with a cross core concave part, and the key cap is fixedly connected with the shaft core through the plug-in fit of the cross core concave part and the cross core convex part.
  6. 6. The thin film keyboard is characterized by further comprising a bottom shell, a PCB (printed circuit board) and a middle plate which are arranged in the bottom shell, and a surface cover which is covered on the surface of the bottom shell, wherein the shaft seat penetrates through the middle plate, the PCB is arranged on the bottom surface of the middle plate, a plurality of conducting contacts which are in one-to-one correspondence with the keys are arranged on the surface of the PCB, the silica gel covers the conducting contacts, and when the key cap is pressed, the shaft core is stressed to downwards squeeze the silica gel, and the conducting contacts are triggered by the silica gel to realize signal conduction.
  7. 7. The membrane keyboard of claim 6, wherein the bottom shell is further provided with a fixing plate, the fixing plate is arranged on the lower surface of the PCB, the fixing plate, the PCB and the middle plate are provided with a plurality of coaxially arranged connecting holes, and the fixing connection of the fixing plate, the PCB and the middle plate is realized by sequentially penetrating through the connecting holes through the connecting piece.

Description

Film keyboard key and film keyboard Technical Field The invention relates to the technical field of keyboards, in particular to a thin film keyboard key and a thin film keyboard. Background Among the many types of keyboards, thin film keyboards, which take up a major share of the market by virtue of low cost, are the dominant choice for mass consumption and industrial applications. The key structure comprises a key and a flexible PCB, wherein the flexible PCB comprises an upper circuit film, an isolation layer and a lower circuit film, conductive circuits and corresponding contacts are printed on opposite surfaces of the upper circuit film and the lower circuit film, and a plurality of silica gel bodies corresponding to the positions of the contacts are arranged on the surface of the upper circuit film. The key transmission and the conductive triggering of the film keyboard are realized completely by the elastic deformation of the upper circuit film of the flexible PCB and the silica gel bowl. The key structure lacks a rigid sectional transmission member of the mechanical keyboard shaft body, so that point contact rigid triggering and paragraph feedback similar to the mechanical shaft cannot be formed, and the overall key hand feeling and operation experience are relatively weak. Therefore, how to optimize the key structure of the thin film keyboard, so as to give consideration to the touch granularity and paragraph feedback of the mechanical keyboard on the basis of keeping the original advantages of the thin film keyboard, has become a technical problem to be solved in the art. In the prior art, the inventor combines the advantages of a mechanical keyboard and a thin film keyboard, and proposes a thin film keyboard key structure with a mechanical key typing hand feel, for example, a publication CN209328755U. The keyboard comprises a keyboard main body and a plurality of keys arranged on the keyboard main body, wherein the keyboard main body comprises a conductive film at the bottom and a supporting plate at the upper part, each key sequentially comprises a silica gel body, a shaft core and a key cap from bottom to top, clamping holes matched with the shaft core are formed in the supporting plate, a telescopic shaft is arranged in the shaft core, and the bottom and the top of the telescopic shaft are correspondingly clamped with the silica gel body and the key cap respectively. In the technical scheme, the shaft core is required to be penetrated from the lower part of the supporting plate to the upper part of the supporting plate and clamped into the clamping hole of the supporting plate, the assembly path is complex, the operation space is limited, the automatic assembly process is difficult to adapt, and the industrial batch production is not facilitated. Disclosure of Invention In order to solve the problems, the technical scheme provided by the invention is that the thin film keyboard keys and the thin film keyboard can keep the advantages of portability, low noise and low cost of the traditional thin film keyboard, can also give consideration to the good and good hand feeling of the mechanical keyboard, and is convenient for batch production. The technical scheme includes that the film keyboard key comprises a key cap, a shaft core, a shaft seat and silica gel, wherein the key cap is connected to the upper end of the shaft core, through holes penetrating up and down are formed in the shaft seat, limiting protrusions are formed in two opposite side surfaces of the shaft core, sliding grooves are correspondingly formed in the inner walls of the through holes, the shaft core is inserted into the through holes from the upper side of the shaft seat downwards and can axially reciprocate along the through holes, the limiting protrusions are adaptively slid in the sliding grooves, downward limiting is formed by a limiting table at the bottom of the sliding grooves to prevent the shaft core from falling downwards, the silica gel groove communicated with the through holes is formed in the shaft seat, the silica gel is contained in the silica gel groove, the silica gel is extruded to elastically deform when the shaft core moves downwards due to force, and the silica gel is elastically reset and drives the shaft core to return to an initial position upwards when the shaft core is subjected to external force. Specifically, the opposite two side surfaces of the shaft core are also provided with elastic clamping hooks, clamping tables are arranged on the opposite side surfaces of the shaft base, when the shaft core is inserted into the shaft base through hole, the inner wall of the through hole extrudes the elastic clamping hooks to deform, when the shaft core moves downwards to the clamping table position, the elastic clamping hooks are elastically reset and clamped on the clamping tables, and the clamping tables limit the elastic clamping hooks in the vertical upward direction. Specifically, the upper end of the s