Safe rotary knob mechanism

Abstract

The invention discloses a safe rotary knob mechanism. In the safe rotary knob mechanism, the swing phase stroke of a limiting swing arm of a rotary knob mounting barrel can be restrained to be stablystagnated at one of a first extreme phase position and a second extreme phase position. According to a rotary knob push disc, the screwing phase stroke of a safe rotary knob and the swing phase strokeof the limiting swing arm are correlated with each other, and therefore the extreme position of a screwing phase position or a second screwing phase position is restrained through any one of the first extreme phase position and the second extreme phase position, and then the safe rotary knob can be prevented from rotating too much and stagnating at the transition position. When the safe rotary knob is mounted, the phase position of the rotary knob push disc and the phase position of a rotary knob mounting barrel are in switchable fit, the extreme position restraining relation can be adjustedso that the rotary knob push disc and the rotary knob mounting barrel can adapt to door leaves with different opening and closing side orientations and different lock hole orientations; and when the safe rotary knob mechanism is used and mounted, the phase position of the rotary knob push disc and the phase position of a rotary knob mounting barrel are in switchable fit, and screwing in a safe locking manner can be achieved.

Description

technical field [0001] The invention relates to the security field, in particular to a safety knob mechanism suitable for door locks. Background technique [0002] The door lock can be equipped with a safety knob mechanism for safety locking of the main bolt in the locked state. [0003] However, the safety knob mechanism of the transmission lacks constraints on the two screwing limit positions of safety activation and safety release. [0004] On the one hand, such a lack of restraint tends to cause over-rotation of the knob, which distorts the transmission member connected between the knob and the safety lock hole; on the other hand, such a lack of restraint tends to cause the knob to stagnate at two extreme positions of rotation The transition position between, when being hit by external force, the knob in the transition position may be uncontrollably and randomly shifted to the screw limit position of the safety activation, which is prone to accidental safety activation....

AI Technical Summary

Problems solved by technology

[0003] However, the safety knob mechanism of the transmission lacks the constraints on the two screw limit positions of safety activation and safety release

[0004] On the one hand, such a lack of restraint tends to cause over-rotation of the knob, which distorts the transmission member connected between the knob and the safety lock hole; on the other hand, such a lack of restraint tends to cause the knob to stagnate at two extreme positions of rotation The transition position between them, when subjected to external impact, the knob in the transition position may be uncontrolled and randomly changed to the screw limit position of the insurance activation, which is prone to accidental activation of the insurance

[0005] In addition, the traditional safety knob mechanism often only supports a single door opening and closing direction and the direction of the safety tongue lock hole, which is not universal

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