Drawing combination button switch with novel pre-pressing stroke locking mechanism

Abstract

The invention provides a drawing combination button switch with a novel pre-pressing stroke locking mechanism. The drawing combination button switch comprises a drawing mechanism, a locking mechanism, a pre-pressing stroke mechanism and a contact mechanism. The locking mechanism, the pre-pressing stroke mechanism and the contact mechanism are sequentially fixed to the lower portion of the interior of the drawing mechanism from top to bottom. The locking mechanism comprises a positioning sleeve and steel balls, an upper locking groove and a lower locking groove are symmetrically formed in the positioning sleeve, and a groove is formed at the position, corresponding to the upper locking groove in the positioning sleeve, in a pressing handle of the drawing mechanism. According to the invention, the locking mechanism and the pre-pressing stroke mechanism are structurally arranged, so the defects of easiness in abrasion, poor reliability, short service life and the like can be effectively overcome. The switch is simple in structural design, reliable in locking and long in service life, and the pre-pressing stroke of the switch can be effectively increased. Not only self-adjustment of the switch contact mechanism can be achieved, but also the possibility of misoperation of the switch caused by the fact that external force mistakenly collides with the switch can be effectively prevented, thereby guaranteeing the reliability of the switch action.

Description

technical field [0001] The invention relates to a pull-out combination button switch with a novel locking mechanism of a pre-pressing stroke, which belongs to the technical field of button switches. Background technique [0002] The push button switch is a switch that drives the internal contact conversion by the driving force on the same line as the push button stroke. It is an important component in the console and panel control system or power supply system of various instruments, meters, electromechanical equipment; its characteristic is that the instrument or control system often needs to work continuously, so the switch must have a locking function to achieve this requirement. And the requirements for switch locking reliability and locking life times are very high. [0003] At present, two kinds of self-locking mechanisms, lock plate and cam sleeve, are generally used. These two kinds of self-locking mechanisms are owing to complex structure, mold forming difficulty,...

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