Processing

Please wait...

Settings

Settings

Goto Application

1. WO2020115687 - FIRE-SAFETY LOCK

Note: Text based on automatic Optical Character Recognition processes. Please use the PDF version for legal matters

[ EN ]

WHAT IS CLAIMED IS:

1. A fire-safety lock comprising:

a main body;

a slide seat slidably mounted within said main body;

a fusible control member made of a low melting point metal, disposed within said main body, and connected to said main body and said slide seat, said fusible control member being melted when an ambient temperature is higher than a melting temperature of said fusible control member;

a latch unit slidably disposed inside said main body and connecting said main body and said slide seat, said latch unit being movable between a locking position and an unlocking position;

a first resilient member disposed within said main body and urging said latch unit to move to the locking position; and

a second resilient member disposed within said main body and connected to said main body and said slide seat;

wherein, when said fusible control member is unmelted, said second resilient member is pre-loaded by said fusible control member to store a restoring force, and

wherein, when said fusible control member is melted, the restoring force of said second resilient member drives said slide seat to move said latch unit to the unlocking position.

2. The fire-safety lock as claimed in Claim 1, wherein said main body has a first side wall and a second side wall opposite to said first side wall, said slide seat being disposed between said first and second side walls, said fusible control member connecting said second side wall and said slide seat .

3. The fire-safety lock as claimed in Claim 2, wherein:

said first side wall has a tongue hole; said slide seat has a first seat lateral plate facing said first side wall, a second seat lateral plate opposite to said first seat lateral plate and disposed proximate to said second side wall, and a seat base plate interconnecting said first and second seat lateral plates, said first seat lateral plate having a mounting hole; and

said latch unit includes a latch rod slidably extending through said mounting hole, a latch tongue connected to one end of said latch rod and slidably extending through said tongue hole, and a latch head connected to the other end of said latch rod oppositely of said latch tongue and disposed between said first and second seat lateral plates.

4. The fire-safety lock as claimed in Claim 3, wherein said first resilient member is a compression spring that is sleeved on said latch rod and that has two opposite ends respectively abutting said latch tongue and said first seat lateral plate.

5. The fire-safety lock as claimed in Claim 4, wherein said second resilient member is an extension spring that connects said second seat lateral plate and said second side wall in a pre-tensioned manner.

6. The fire-safety lock as claimed in Claim 3, wherein said main body has an elongate slot, said latch unit further including a manually operated push rod connected to said latch rod and extending outwardly of said main body through said elongate slot.

7. The fire-safety lock as claimed in Claim 1, wherein said melting temperature of said fusible control member ranges between 70°C and 150°C.

8. The fire-safety lock as claimed in Claim 7, wherein said fusible control member is made of a low melting point alloy containing 50 wt% of Bi, 26.7 wt% of Pb, 13.3 wt% of Sn, and 10 wt% of Cd, said melting temperature of said fusible control member being 70 ° C .

9. The fire-safety lock as claimed in Claim 7, wherein said fusible control member is made of a low melting point alloy containing 52.5 wt% of Bi, 32 wt% of Pb, and 15.5 wt% of Sn, said melting temperature of said fusible control member being 95°C.