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Address: No.1 Dongsan RD, Xinlian Industrial Area, Lishui Town, Nanhai District, Foshan City, Guangdong Province, China
Mob: +86-13826111091
Tel: +86-757-85619957
Fax: +86-757-85619955

Email: hyh5@china-hyh.com


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Entry Door Lock
Aug 24, 2018

Entry Door Lock

I . The lock tongue determines whether the security door lock performance is good or bad

There are many kinds of lock tongues for anti-theft door locks, such as oblique tongue, square 

tongue, anti-saw lock tongue, double hook lock tongue, etc. The earliest we common is the 

oblique tongue. The inclined surface design of the oblique tongue and the internal spring parts are 

completely closed for convenience. . The structure of the slanted tongue is too easy to be cracked, 

so people invented the square tongue.


The slanting tongue features a three-pronged silent design that provides very low noise when 

opening or closing the door. This effectively prevents the user from disturbing the person who is 

resting when opening or closing the door.


The square tongue differs from the oblique tongue in that it does not contain a spring member 

and therefore cannot be automatically ejected and does not indent due to external forces. The 

square tongue is controlled by the action of opening the door to lock the door, and its fixation is 

strong. Because of this characteristic, we must make the square tongue work by operation. This is 

why most of the external door locks in China use the combination of the oblique tongue and the 

square tongue.


When purchasing the anti-theft door lock, it is also necessary to pay special attention to the lock 

tongue. The outer door lock must select the lock core of the multi-point lock tongue to strengthen 

the safety factor.


II. Our professional service

1: Timely shipment time. 

2: Focus on door handle and hardware field ,varied items can be supply. 

3: Competitive price, company prefer long term business with customers.

4: Die-casting, drilling, punch and polish can be strictly controlled.

5: Before shipment we will check the goods again by sales team. Double guarantee.






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    Address: No.1 Dongsan RD, Xinlian Industrial Area, Lishui Town, Nanhai District, Foshan City, Guangdong Province, China
    Mob: +86-13826111091
    Tel: +86-757-85619957
    Fax: +86-757-85619955

    Email: hyh5@china-hyh.com


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