GB2515054A

GB2515054A - Safety lock core assembly

Info

Publication number: GB2515054A
Application number: GB1310448.4A
Authority: GB
Inventors: Tien-Kao Liu
Original assignee: Federal Lock Co Ltd
Current assignee: Federal Lock Co Ltd
Priority date: 2013-06-12
Filing date: 2013-06-12
Publication date: 2014-12-17
Also published as: GB201310448D0

Abstract

A cylinder lock assembly includes a lock base 1 having a housing 11 which has two rings 12 and two axial rods 5 on which is mounted a sleeve 16 and rotatable lock cores 2 coaxial with the rings. The housing has two passages 17 opening within the rings. Each passage has a biased anti-tamper stop pin received therein. Connected to each ring is a collar 3a, 3b, the first collar has a radially extending flange 31a protruding beyond the ring. Each collar has a hole aligned with the passage within which is mounted a blocking piece retained in place by the lock core. Fraudulent removal of the lock core and sleeve by breaking releases the stop pin which is biased into the hole in the collar preventing removal and rotation of the collar and also preventing rotation of a cam 14 driving member 5a if present. The radial flange 31a abuts the face of a mortice lock casing eliminating any gap and preventing insertion of a tool into the lock casing.

Description

SAFETY LOCK CORE ASSEMBLY

FIELD OF THE INVENTION

The present invention relates to a safety lock core assembly, and more particularly, to a safety lock core which has a flange to cover the outside of the hole of the escutcheon so as to prevent the lock from being damaged.

BACKGROUND OF THE INVENTION

The conventional lock is disclosed in Figs. 1 and 2, and generally comprises a lock base 10 with a locking hole 101. The lock base 10 has two rods 102 extending axially therefrom and the two rods 102 each have a io recess 1021 which is located close to the lock base 10. Two sleeves 103 are respectively mounted to the two rods 102 and two rings 104 and two spaces are formed radially to the lock base 10. A recessed area 1041 is defined between the two rings 104 and each ring 104 is mounted to a driving member 106 which has a notch 1061 located corresponding to the space 105.

A block 20 is located in each notch 1061. The spaces 105 communicate with the rings 104. Each space 105 has a stop unit 30 located therein. Two through holes 107 respectively communicate with the two spaces 105 arid each through hole 107 has an engaging unit 40 received therein which is resiliently in contact with the stop unit 30. A cam 50 is located in the recessed area 1041 and two ends of the cam 50 are respectively connected with two cores 60. The cores 60 extend through the sleeve 103.

When in use, the lock is cooperated with an escutcheon 70 which has a hole 701. A dead bolt 702 and a control unit (not shown) for controlling the dead bolt 702 are located in the escutcheon 70. The dead bolt 702 is protruded and retracted by the control unit. The core base 10 is connected to the hole 701 and secured to the escutcheon 70. The user uses the correct key to rotate the cam 50 to drive the control unit to operate the dead bolt 702 to lock or unlock the door. When an unauthorized person hits the core 60 to break one of the rods 102 at the recess 1021, and the sleeve 103 and the core can be pulled out. The block 20 is removed from the notch 1061, the stop unit 30 is inserted into the notch 1061 and stopped by the engaging unit 40, so that the driving member 106 cannot be rotated and the unauthorized jo person cannot rotated the cam 50 to unlock the lock. However, because one of the rods 102 is broken, the person can keep on hitting the escutcheon 70 and core 60 to cause a gap between the lock base 10 and the escutcheon 70.

A tool such as an L-shaped wrench is inserted into the gap to push the control unit directly to shift the dead bolt 702 to unlock the lock.

The present invention intends to provide a safety lock core which improves the shortcomings mentioned above.

SUMMARY OF THE INVENTION

The present invention relates to a lock core assembly and comprises a lock base having a housing and a locking hole is defined through the housing.

Two rings are formed radially on the housing and a recessed area is defined between the two rings. A cam is located in the recessed area. Two rods extend axially from the housing and two sleeves are respectively connected to the two rods. Two cores are respectively mounted by the two sleeves. The two rings are respectively mounted to the two cores. Each of the rings is mounted to a first member and a second member, and the cam is connected between the first and second members. The first member has a first flange extending radially therefrom which protrudes beyond the ring. Two passages are defined in the housing and located corresponding to cach other. Each of the first and second members has a hole which is smaller than the passage.

Each of the holes has a block received therein. The passages are located at one end of the housing. Each passage has a resilient member and a stop pin received therein. The stop pin contacts the resilient member. An engaging io face and a restriction face are formed on two ends of the stop pin. The engaging face faces the resilient member and the restriction face faces the hole. A contact portion extends from the restriction face. The housing has two rooms which communicate with the two passages respectively. Each room has a resilient piece and an engaging member received therein. The engaging member is located corresponding to the engaging face of the stop pin and biased by the resilient piece to contact the stop pin. The contact portion contacts the block.

When the block is removed from the hole, the stop pin is pushed by the resilient member to insert the contact portion into the hole. The stop pin is separated from the room and the engaging member is pushed by the resilient piece to extend through a connection portion between the room and the passage to stop the engaging face of the stop pin from being moved back by the engaging member.

Preferably, an escutcheon has a hole defined therethrough arid the core base is located in the hole of the escutcheon. The first flange covers up the hole of the escutcheon.

Preferably, the second member has a second flange extending radially therefrom. The first flange is larger than the second flange. The first and second flanges are respectively located on two sides of the hole of the escutcheon. The first flange is located on outside of the escutcheon.

Preferably, a positioning member is located between the cam and the rings. The first member has a connection portion to which one of the io positioning members is connected.

Preferably, two respective positioning members are located between the cam and the rings. The second member has a connection member to which one of the positioning members is connected.

Preferably, the blocks are pushed by the contact portions to contact the cores. The first member and the second member each have a stepped surface and at least one recess is formed axially thereto. Each of the first and second members has a driving member located therein which is located corresponding to a protrusion of the recess. The cam has two engaging portions which are located corresponding to the stepped surfaces so as to connect the first member, the second member and the cam. The cam has two slots which are located corresponding to the protrusions.

Preferably, the driving members are located corresponding to each other and each have a through hole. A link extends through the two through holes to drive the driving members.

Preferably, the positioning members are C-clips.

Preferably, the rods each have a groove and at least one pin hole. Each of the sleeves has a connection hole which is located corresponding to the pin hole. A positioning pin extends through the corresponding connection hole and the pin hole.

The primary object of the present invention is to provide a lock core assembly wherein the area of the first flange is larger than that of the second flange, so that when the lock base is damaged and the core is pulled out from the lock base, the stop pin is inserted into the hole and the first flange covers up the hole in the escutcheon to prevent the unauthorized person to damage the core and the escutcheon via the hole.

Besides, the positioning members are engaged with the first and second members to avoid the first and second members from being shifted.

Because first and second members are positioned by the positioning members, the holes and the passages are located corresponding to each other, so that the stop pins are inserted into the holes, to prevent the cam from being rotated from the damaged end of the lock base to unlock the lock. The present invention can be used in wide range of applications and has high safety feature.

The present invention will become more obvious from the following description when taken in connection with the accompanying drawings which show, for purposes of illustration only, a preferred embodiment in accordance with the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS

Fig. I is a partial cross sectional view to show that the rod of the conventional lock is broken; Fig. 2 shows that an L-shaped wrench is used to damage the conventional lock; Fig. 3 is an exploded view to show a lock core assembly of the present invention; Fig. 4 is a perspective view to show the lock core assembly of the io present invention; Fig. 5 is a perspective view to show that the lock core assembly of the present invention is installed to the escutcheon; Fig. 6 shows the cross sectional view, taken along line A-A in Fig. 5; Fig. 7 shows the cross sectional view, taken along line B-B in Fig. 5; Fig. 8 shows that the rod of the lock core assembly of the present invention is broken, and Fig. 9 shows that the stop pin is in locked status in the B-B direction.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT

Referring to Figs. 3 to 7, the lock core assembly of the present invention comprises a lock base 1 having a housing 11 and a locking hole ill is defined therethrough. Two rings 12 are formed radially on the housing 11 and a recessed area 13 is defined between the two rings 12. A cam 14 is located in the recessed area 13. Two rods 15 extend axially from the housing 11. The rods 15 each have a groove 151 and at least one pin hole 152. Two sleeves 16 are respectively connected to the two rods 15. Each of the sleeves 16 has a connection hole 161 which is located corresponding to the pin hole 152. A positioning pin 162 extends through the corresponding connection hole 161 and the pin hole 152. The two rings 12 are respectively mountcd to the two cores 2 and two cores 2 are respectively mounted by the two sleeves 16. Each of the rings 12 is mounted to a first member 3a and a second member 3b. The cam 14 is connected between the first and second members 3a, 3b. The first member 3a has a first flange 3 la extending radially io therefrom which protrudes beyond the ring 12. The second member 3b has a second flange 31 b extending radially therefrom, the first flange 31 a is larger than the second flange 3 lb. Two respective positioning members 4a, 4b are located between the cam 14 and the rings 12, the first member 3a has a connection portion 32a to which the positioning member 4a is connected, and the second member 3b has a connection member 32b to which the positioning member 4b is connected. The positioning members 4a, 4b are C-clips.

Two passages 17 are defined in the housing 11 and located corresponding to each other. Each of the first and second members 3a, 3b having a hole 33a133b which is smaller than the passage 17. Each of the holes 33a, 33b has a block 34a134b received therein. The passages 17 are located at one end of the housing 11, and each passage 17 has a resilient member 171 and a stop pin 172 received therein. The stop pin 172 contacts the resilient member 171, an engaging face 1721 and a restriction face 1722 formed on two ends of the stop pin 172. The engaging face 1721 faces the resilient member 171 and the restriction face 1722 faces the holes 33a, 33b.

A contact portion 1723 extends from the restriction face 1722 and located s corresponding to the hole 33a, 33b. The housing 11 has two rooms 18 which communicate with the two passages 17 respectively, each room 18 has a resilient piece 181 and an engaging member 182 received therein. The engaging member 182 is located corresponding to the engaging face 1721 of the stop pin 172 and biased by the resilient piece 181 to contact the stop pin 172. The contact portions 1723 push the blocks 34a, 34b which are respectively in contact with the cores 2.

The first member 3a and the second member 3b each have a stepped surface 35a135b and at least one recess 36a136b formed axially thereto. Each of the first and second members 3a, 3b has a driving member 5a15b located therein which has a protrusion 51 a15 lb located corresponding to the recess 36a136b. The driving members 5a, 5b are located corresponding to each other and each have a through hole 52a!52b. A link 6 extends through the two through holes 52a, 52b to drive the driving members 5a, Sb. The cam 14 has two engaging portions 141 which are located corresponding to the stepped surfaces 35a, 35b so as to connect the first member 3a, the second member 3b and the cam 14. The cam 14 has two slots 142 which are located corresponding to the protrusions 51 a, 5 lb. An escutcheon 7 has a hole 71 defined therethrough which is

S

perpendicularto the locking hole Ill. The core base 1 is located in the hole 71 of the escutcheon 7. The first flange 31 a and the second flange 31 b are respectively located on two sides of the hole 71 of the escutcheon 7. The first flange 31 a covers up the hole 71 of the escutcheon 7 from outside.

As shown in Figs. 8 and 9, when the lock base 1 is hit maliciously, the rod 15 is broken at position where the groove 151 is located and the sleeve 16 is removed from the rod 15. The core 2 is able to be pulled out. The block 34a is removed from the hole 33a, and the stop pin 172 is pushed by the resilient member 171 to insert the contact portion 1723 into the hole 33a. The io stop pin 172 is separated from the room 18 and the engaging member 182 is pushed by the resilient piece 181 to extend through the connection portion between the room 18 and the passage 17 to stop the engaging face 1721 of the stop pin 172 from being moved back by the engaging member 182. The first flange 31 a covers up the hole 71 of the escutcheon 7 from outside, so that the unauthorized person cannot use any tool such as the L-shaped wrench to damage the escutcheon 7 via the hole 71 so as to protect the core 2 and the escutcheon 7.

Because the positioning members 4a, 4b are respectively engaged with the first and second members 3a, 3b, as shown in Fig. 6, the connection portion 32a of the first member 3a is engaged with the positioning member 4a, and the connection member 32b of the second member 3b is engaged with the positioning member 4b, so that the first and second members 3a, 3b are well positioned and do not shift by impact from outside to ensure that the stop pins 172 are thserted into the holes 33a, 33b when the lock base 1 is damaged, and to prevent the cam 14 from being rotated, The lock core assembly of the present invention has better safety feature by providing the first and second members 3a, 3b, wherein the first flange 31a is larger than the second flange 31b. The first and second members 3a, 3b are respectively located on two sides of the hole 71 of the escutcheon 7 and the first flange 31 a covers up the hole 71 from outside so that even if the unauthorized person damages the rod(s) 15, the stop pin 172 at the damaged side is inserted into the hole 33a to prevent the first member 3a and the cam 14 from being rotated. The lock base I and the escutcheon 7 are protected.

The first member 3a has the first flange 3 la which covers up the hole 71 of the escutcheon 7. The lock base 1 can be cooperated with different types of escutcheons 7 without worry the size of the hole 71. The present invention provides higher safety feature and can be used in wide range of applications.

While we have shown and described the embodiment in accordance with the present invention, it should be clear to those skilled in the art that further embodiments may be made without departing from the scope of the present invention.

Claims

WHAT IS CLAIMED IS: 1. A lock core assembly comprising: a lock base having a housing with a locking hole defined therethrough, two rings formed radially on the housing and a recessed area defined between the two rings; a cam located in the recessed area, two rods extending axially from the housing, two sleeves respectively connected to the two rods and two cores respectively mounted by the two sleeves, the two rings respectively mounted to the two cores, each of the rings mounted to a first member and a second member, the cam connected between the first and second members, the first member having a first flange extending radially therefrom which protrudes beyond the ring, and two passages defined in the housing and located corresponding to each other, each of the first and second members having a hole which is smaller than the passage, each of the holes having a block received therein, the passages located at one end of the housing, each passage having a resilient member and a stop pin received therein, the stop pin contacting the resilient member, an engaging face and a restriction face formed on two ends of the stop pin, the engaging face facing the resilient member and the restriction face facing the hole, a contact portion extending from the restriction face and located corresponding to the hole, the housing having two rooms which communicate with the two passages respectively, each room having a resilient piece and an engaging member received therein, the engaging member located corresponding to the engaging face of the stop pin and biased by the resilient piece to contact the stop pin, the contact portion contacting the block, when the block is removed from the hole, the stop pin is pushed by the resilient member to insert the contact portion into the hole, the stop pin is separated from the room and the engaging member is pushed by the resilient piece to extend through a connection portion between the room and the passage to stop the engaging face of the stop pin from being moved back by the engaging member.
2. The lock core assembly as claimed in claim 1, wherein an escutcheon has a hole defined therethrough and the core base is located in the hole of the escutcheon, the first flange covers up the hole of the escutcheon.
3. The lock core assembly as claimed in claim 2, wherein the second member has a second flange extending radially therefrom, the first flange is larger than the second flange, the first flange and the second flange are respectively located on two sides of the hole of the escutcheon, the first flange is located on outside of the escutcheon.
4. The lock core assembly as claimed in claim 1, wherein a positioning member is located between the cam and the rings, the first member has a connection portion to which one of the positioning members is connected.
5. The lock core assembly as claimed in claim 1, wherein two respective positioning members are located between the cam and the rings, the second member has a connection member to which one of the positioning members is connected.
6. The lock core assembly as claimed in claim 1, wherein the blocks are pushed by the contact portions to contact the cores, the first member and the second member each have a stepped surface and at least one recess formed ic axially thereto, each of the first and second members has a driving member located therein which is located corresponding to a protrusion of the recess, the cam has two engaging portions which are located corresponding to the stepped surfaces so as to connect the first member, the second member and the cam, the cam has two slots which are located corresponding to the protrusions.
7. The lock core assembly as claimed in claim 6, wherein the driving members are located corresponding to each other and each have a through hole, a link extends through the two through holes to drive the driving members.
8. The lock core assembly as claimed in claim 4, wherein the positioning members are C-clips.
9. The lock core assembly as claimed in claim 1, wherein the rods each have a groove and at least one pin hole, each of the sleeves has a connection hole which is located corresponding to the pin hole, a positioning pin extends through the corresponding connection hole and the pin hole.