Patent Application
20230178309
The present disclosure relates to the technical field of keyboards, in particular to a composite rubber dome and a molding method.
A thin film keyboard mainly includes keycaps, scissored feet (X-shaped supports) arranged below the keycaps, and rubber domes, wherein the X-shaped supports are used to fix and stabilize the keycaps and are matched with a thin film circuit layer (i.e. a flexible circuit board) disposed on the bottom. With reference to
Since the rubber dome in the prior art is molded by integral injection of a silicon rubber material, with reference to
In order to solve the above-mentioned technical problems, the present disclosure provides a composite rubber dome including a supporting part, an elastic connecting part, a pressing part and an exhaust ditch arranged on the supporting part and connected inside and outside, wherein the pressing part is further compounded with a composite part made of a non-silicon rubber material having higher hardness than the silicon rubber material, and the composite part and the pressing part are coaxially and correspondingly disposed in a pressing direction.
The composite part is disposed on a side, in contact with a keycap, of an axial outer end of the pressing part; or the composite part is disposed on a side, corresponding to the thin film circuit layer, of an axial inner end of the pressing part.
The present disclosure further provides a molding method for the above-mentioned composite rubber dome. When the rubber dome is molded by integral injection, the composite part is compositely molded with a rubber dome body by adopting an embedding or injection molding method.
According to the above-mentioned technical solutions, the composite part made of the non-silicon rubber material having higher hardness than the silicon rubber material is compounded on a side, in contact with the keycap or corresponding to the shaft core, of the pressing part of the rubber dome; and due to the existence of the composite part, a return force of the pressing part is more excellent, so that the Click action tactile sense of the key is improved and the service life of the key is effectively prolonged.
In order to describe the technical solutions in the embodiments of the present disclosure or the prior art more clearly, the accompanying drawings required for describing the embodiments or the prior art will be briefly introduced below.
In the drawings: 11, supporting part; 12, elastic connecting part; 13, pressing part; 14, exhaust ditch; and 15, composite part.
The technical solutions in the embodiments of the present disclosure will be clearly and completely described below with conjunction with the accompanying drawings in the embodiments of the present disclosure.
With reference to
Specifically, the composite part 15 is disposed on an end, in contact with the keycap, of the axial outer end of the pressing part 13, and is compounded with the pressing part 13 in an embedding way as shown in
Specifically, the composite part 15 is disposed on an end, in contact with the keycap, of the axial outer end of the pressing part 13, and is compounded with the pressing part 13 in an equiradial cross-section fitting way as shown in
Specifically, as shown in
Based on the above embodiments 1-3, when the rubber dome is molded by integral injection, the composite part 15 is compositely molded with a rubber dome body by adopting an embedding method. For the embedding method, generally, the composite part 15 made of the hard non-silicon rubber material is directly embedded into a mold before being molded by injection, and next, the rubber dome body is molded by integral injection, and then is compositely molded with the composite part 15.
Based on the above embodiments 1-3, when the rubber dome is molded by integral injection, the composite part 15 is compositely molded with a rubber dome body by adopting an injection molding method. For the injection molding method, generally, after the rubber dome body is molded by integral injection, and then, the composite part 15 is compositely molded by injection based on the molded rubber dome body.
According to the present disclosure, the composite part 15 made of the non-silicon rubber material having higher hardness than the silicon rubber material is compounded on a side, in contact with the keycap, of the axial outer end of the pressing part of the rubber dome, or a side, corresponding to the thin film circuit layer, of the axial inner end of the pressing part of the rubber dome; and due to the existence of the composite part 15 having the higher hardness than the silicon rubber material, an inward deformation pressure of the pressing part 13 is increased when the pressing part 13 is pressed downwards to elastically deform, so that a return force of the pressing part 13 is more excellent, and then, the Click action tactile sense of the key is improved and the service life of the key is effectively prolonged.
For the above-mentioned description for the embodiments of the present disclosure, the present disclosure can be implemented or used by the skilled in the art. Various modifications for the above-mentioned embodiments will become apparent to the skilled in the art, and the general principle defined herein can be implemented in other embodiments without departing from the spirit or scope of the present disclosure. Therefore, the present disclosure will not be limited to these embodiments described herein, but should conform to the widest scope consistent to the principle and novel characteristics disclosed herein.
