an automatic plug

Abstract

The invention discloses an automatic bolt. The automatic bolt comprises a bolt box and a bolt rod movably penetrating through the bolt box; a lock hook is hinged to the outer side of the bolt box by use of a rotating shaft; the axis of the rotating shaft is perpendicular to the longitudinal axis of the bolt rod; a clamping hook part is arranged on one end of the lock hook; a first return spring is mounted on one end, far away from the clamping hook part, of the lock hook; the rotating shaft is located between the clamping hook part and the first return spring; a guide groove is formed in the bolt box; the clamping hook part of the lock hook extends into the guide groove; the clamping hook part is provided with a first guide surface and a first limiting surface; a limiting block is arranged on the bolt rod and provided with a second limiting surface; the second limiting surface can be matched with the first limiting surface so that the limiting block can be hooked by the clamping hook part; a second return spring, which can be squeezed by the matched limiting block and bolt box when the bolt rod is pushed, sleeves the bolt rod. The automatic bolt is simple in structure and durable; when the automatic bolt is used, a self-locking and unlocking function can be realized just by pressing the bolt rod or the lock hook; as a result, the automatic bolt is very convenient to use.

Description

technical field [0001] The invention belongs to the field of latches, in particular to an automatic latch. Background technique [0002] Existing latch generally comprises plunger and manual lever, and plunger is generally cylindrical, and its front and rear ends are equally big. During use, the rear end of the inserting rod generally slides into the matching bracket. When the door needs to be opened, the manual lever is slid out of the bracket, which cannot automatically eject from the bracket, which is not convenient enough to use. In Chinese invention patent specification CN103806768A, a kind of safety latch is disclosed. When doors and windows are locked, the push handle is pressed, and the safety pin is inserted into the safety hole under the action of the positioning spring to limit the reset of the latch rod. When the doors and windows need to be opened, the safety pin is pulled open by hand, and the latch lever returns to the initial position under the action of the...

AI Technical Summary

Problems solved by technology

[0006] Aiming at the above defects or improvement needs of the prior art, the present invention provides an automatic latch, the purpose of which is to overcome the problems of inconvenient operation and complicated structure in the existing automatic latch

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