Claims
- 1. A push button for a value input inductive keyboard, comprising: a one-piece keyboard base to which a longitudinal guidance sleeve is molded on one side thereof and snap-in means are provided on another side thereof for fastening the keyboard base to a printed circuit board, the snap-in means including snap-in hooks arranged so as to engage the circuit board through a hole therein so that the keyboard base lies essentially flat on one side of the circuit board and the hooks project beyond the other side of the circuit board a very small distance in comparison to the guidance sleeve length; a one-piece push-button head having a lower side and a shaft integrally molded on the lower side so as to be engagable with the guidance sleeve; a pressure spring effective between the keyboard base and the push-button head; a ferrite core attached to the lower side of the push-button head so as to engage in respective holes in the keyboard base and the printed circuit board; and stop means for limiting the stroke of the push button in a non-actuated state thereof, the guidance sleeve having a pass-through aperture formed therethrough for receiving said shaft, the snap-in means being centrally located about said aperture, and a lug integrally molded on the same side of said keyboard base as said snap-in means, said lug being formed with a guidance aperture therethrough, said shaft on said push-button head having an axial slot forming resilient shaft segments, and a dog radially molded on at least one of the resilient shaft segments so as to cooperate with a stop face formed in said keyboard base, said push-button head further having a finger molded integrally therewith on the lower side so as to be substantially parallel to said shaft and engagable with said guidance aperture formed in said lug with a close tolerance so as to prevent relative turning of said head and said base.
Priority Claims (1)
Number |
Date |
Country |
Kind |
8705193[U] |
Apr 1987 |
DEX |
|
Parent Case Info
This is a continuation application of Ser. No. 07/178,468, filed Apr. 4, 1989, now abandoned.
US Referenced Citations (3)
Continuations (1)
|
Number |
Date |
Country |
Parent |
178468 |
Apr 1988 |
|