Switch for inputting signal

Abstract

There is provided a switch which is excellent in stability in electric contact between an edge part of a contact spring and a fixed contact part, ensures a stroke required for an eccentric load which is imposed on the contact spring and reduces variations in clicking feeling without shortening a life of the dome-shaped contact spring which can be clicked. A depression is formed on an inner central part of the contact spring, namely, on a movable contact part and the edge part formed on the periphery of the depression is allowed to contact the surface of the fixed contact part by a line contact, thereby ensuring electric stability of contact between the edge part and the fixed contact part. Since the movable contact part has no hole, no dust enters the switch, thereby preventing a life of the contact spring from being shortened. Further, since the central part of the contact spring is formed in a dome part by a spherical surface and a skirt part is formed of a conical surface on the outer peripheral edge part of the dome part, a required stroke is ensured and variations in clicking feeling are reduced.

Description

technical field [0001] The present invention relates to a signal input switch, especially a signal input switch suitable for audio reproduction equipment, closed-circuit equipment, mobile phones and other communication equipment, as well as electrical and electronic equipment such as measuring equipment, especially an improved pronunciation-able switch. Hemispherical movable contact spring. Background technique [0002] A conventional switch for signal input used in electrical and electronic equipment has a hemispherical contact spring capable of sounding, and a fixed contact part corresponding to the movable contact part inside the contact spring. [0003] Pronounceable hemispherical contact springs can be used in mobile phones etc., for use with printed substrates. The switch conductive pattern of the printed circuit board usually forms a contact piece corresponding to the outer peripheral portion of the contact spring and a fixed contact portion corresponding to the mova...

AI Technical Summary

Problems solved by technology

[0005] Due to the existence of the skirt part, the way the skirt part is formed, the movement distance of the contact spring increases or decreases, or the pressing position deviates from the center position of the hemispherical contact spring, so that the reverse load increases and the return load increases at the same time, Therefore, at a position deviated from the center of the contact spring, the tactile feel of the sound-pronunciation action will be degraded

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