Concealed anti-theft chain

Abstract

The invention discloses a concealed door chain which is suitable for both inward-opening doors and outward-opening doors and does not damage the formats of door pockets. The concealed door chain comprises a fastener seat, a sliding chain and a fixing sleeve, wherein an inner cylinder body is arranged in the fixing sleeve; a driving device is arranged on the inner cylinder body and used for driving the concealed door chain to be locked or unlocked; the inner cylinder body is located in a door panel, so that the driving device can be arranged on the inner side of the door panel; without a burglar-proof switch, the fastener seat can be optionally arranged on the inner side and the outer side of a door pocket, so that no matter the concealed door chain is applied to an inward-opening door or an outward-opening door, the driving device is always located on the inner side of the door; meanwhile, the fastener seat dispensing with a fixed switch is simpler in structure, so that the size of the fastener seat can be greatly reduced, a wired gate of the door pocket cannot be damaged, the exposed surface area of the fastener seat is reduced correspondingly, and the structure of the whole door is more attractive; the concealed door chain is suitable for being popularized in the door control hardware field.

Description

technical field [0001] The invention relates to the field of door control hardware, in particular to a concealed anti-theft chain. Background technique [0002] In the door control hardware industry, the anti-theft door chain, also known as anti-theft chain or anti-theft chain, is a metal chain with a lock installed on the inside of the entrance door. The anti-theft chain is clearly installed and the anti-theft chain is concealed. Because the exposed parts of the anti-theft chain are more exposed and not very beautiful, it has basically withdrawn from the market now. The concealed anti-theft chain includes buckles, sliding chains, and fixed sleeves. The sliding chain includes a chain and a chain buckle. The fixing sleeve is installed on the side of the door leaf, and the buckle seat is installed on the door cover. One end of the sliding chain is fixed in the fixing sleeve, and the other end is movable and can be inserted into the buckle seat. There is an anti-theft switch f...

AI Technical Summary

Problems solved by technology

At present, the concealed anti-theft chains used have the following problems during use: First, the existing concealed anti-theft chains are all equipped with anti-theft switches on the buckles for fixing the sliding chain. In order to ensure safety, the anti-theft switches must be located at In the house, so that the buckle can only be installed on the side of the door facing the house, and then it can only be applied to the inner door. For the outer door, if the existing concealed anti-theft chain switch is installed, it will appear on the outside of the door, so One concealed anti-theft chain is useless and useless; secondly, the anti-theft switches of the existing anti-theft chains for fixing the sliding chain are all mounted on the buckle seat, which makes the buckle seat larger, and then requires Opening a large slot on the door cover will destroy the shape of the door cover, and the exposed surface area of ​​the buckle seat is large, making the entire door structure unsightly and inconvenient to use

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