EP2345783A1

EP2345783A1 - Burglarproof lock assembly

Info

Publication number: EP2345783A1
Application number: EP10150806A
Authority: EP
Inventors: Hsiu-Chuan Wu; I-Chien Hsin
Original assignee: Individual
Current assignee: Individual
Priority date: 2010-01-14
Filing date: 2010-01-14
Publication date: 2011-07-20

Abstract

A burglarproof lock assembly has a casing (1), a lock core (2), multiple locking pin assemblies (3), a supplementary locking assembly (4) and a key (5). The casing (1) has multiple outer chambers (12). The lock core (2) is mounted rotatably in the casing (1) and has multiple inner chambers (21) and a keyhole (22). The supplementary locking assembly (4) is mounted slidably in corresponding outer chamber (12) and the inner chamber (21) and has a first block (41) and a second block (42). The second block (42) has a locking pin (422) selectively engaging a locking recess (411) in the first block (41). The key (5) has a magnetic element (52) corresponding to the locking pin (422). The locking pin (422) is kept in the locking recess (411) if a key without the magnetic element (52) is inserted into the keyhole (22).

Description

BACKGROUND OF THE INVENTION

1. Field of the Invention

The present invention relates to a lock, and more particularly to a burglarproof lock assembly.

2. Description of Related Art

With reference to Figs. 7 and 8, a conventional lock assembly comprises a casing (6), a lock core (7) and multiple locking pin assemblies (8).
The casing (6) is mounted in a door panel or any object that needs to be locked and has a core hole (61) and multiple outer chambers (62). The core hole (61) is circular and is formed longitudinally in the casing (6). The outer chambers (62) are formed radially in the casing (6) and arranged side by side on the casing (6) and communicate with the core hole (61).
The lock core (7) is mounted rotatably in the core hole (61) and has a front end, an outer surface, a keyhole (71) and multiple inner chambers (72). The keyhole (71) is formed axially in the front end of the lock core (7). The inner chambers (72) are formed radially in the outer surface of the lock core (7), align respectively with the outer chambers (62) and communicate with the keyhole (71).
The locking pin assemblies (8) are mounted respectively in the corresponding outer chambers (62) and inner chambers (72), and each locking pin assembly (8) has an outer block (81), an inner block (82) and an outer spring (83).
Each outer block (81) is mounted slidably in corresponding outer and inner chambers (62, 72), and each outer block (81) may have a recess (811), a through hole (812), an outer pin (813) and an inner spring (814). The outer pin (813) is mounted slidably in the recess (811) and the through hole (812) of the outer block (81). The inner spring (814) is mounted between the outer pin (813) and the outer block (81).
Each inner block (82) is mounted slidably in the inner chamber (72) and selectively extends into the keyhole (71). Each inner block (82) may have a recess (821), a through hole (822) and an inner pin (823). The inner pin (823) is mounted slidably in the recess (821) and the through hole (822) and abuts with the outer pin (813).
Each outer spring (83) is mounted in the outer chamber (62) and abuts against and provides a resilient force to the outer block (81) to push the outer block (81) into the inner chamber (72), such that the lock core (7) can not be rotated and is locked.
Additionally, each locking pin assembly (8) may further have a block (84) mounted between the outer spring (83) and the outer block (81).
With further reference to Fig. 9, when a corresponding key is inserted into the keyhole (71), the outer blocks (81) and outer pins (813) are pushed out from the inner chambers (72) by the corresponding inner blocks (82) and inner pins (823), and the conventional lock assembly is unlocked. However, the outer blocks (81) may be pushed out from the inner chambers (72) by a vibrating tool inserting into the keyhole without a corresponding key, so the burglarproof effect of the conventional lock assembly is not good enough.
Therefore, the present invention provides a burglarproof lock assembly to overcome the aforementioned problems.

SUMMARY OF THE INVENTION

An objective of the invention is to provide a burglarproof lock assembly.
A burglarproof lock assembly has a casing, a lock core, multiple locking pin assemblies, a supplementary locking assembly and a key. The casing has a core hole and multiple outer chambers. The core hole is formed longitudinally in the casing. The outer chambers are formed radially in the casing and communicate with the core hole. The lock core is mounted rotatably in the core hole of the casing and has a front end, an outer surface, multiple inner chambers and a keyhole. The inner chambers are formed radially in the outer surface of the lock core and align respectively with the outer chambers. The keyhole is formed axially in the front end of the lock core and communicates with the inner chambers. Each locking pin assembly is mounted in one of the outer chambers and a corresponding one of the inner chambers and has an outer block, an inner block and an outer spring. The outer block is mounted slidably in a corresponding outer chamber and a corresponding inner chamber. The inner block is mounted slidably in the corresponding inner chamber and selectively extends into the keyhole. The outer spring is mounted in the corresponding outer chamber and abuts with the outer block. The supplementary locking assembly is mounted in one of the outer chambers and a corresponding inner chamber and has a first block, an outer spring and a second block. The first block is mounted slidably in the corresponding outer chamber and the corresponding inner chamber and has an inner end and a locking recess formed in the inner end of the first block. The outer spring is mounted in the corresponding outer chamber and abuts with the first block. The second block is mounted slidably in the corresponding inner chamber, selectively extends into the keyhole and has a holding recess, a locking pin and a locking spring. The holding recess is formed through the second block. The locking pin is mounted slidably in the holding recess and selectively extends into the locking recess of the first block. The locking spring is mounted in the holding recess and abuts with and provides a force to the locking pin to make the locking pin engage the locking recess. The key has a contact surface, a cavity and a magnetic element. The cavity is formed in the contact surface of the key and corresponds to the locking pin when the key is inserted into the keyhole. The magnetic element is mounted in the cavity.
Other objectives, advantages and novel features of the invention will become more apparent from the following detailed description when taken in conjunction with the accompanying drawings.

BRIEF DESCRIPTION OF THE DRAWINGS

Fig. 1 is a front view in partial section of a preferred embodiment of a burglarproof lock assembly in accordance with the present invention;
Fig. 2 is a side view in partial section of the burglarproof lock assembly in Fig. 1;
Fig. 3 is a front view in partial section of the burglarproof lock assembly in Fig. 1 with a corresponding key inserted into a keyhole;
Fig. 4 is a side view in partial section of the burglarproof lock assembly in Fig. 3;
Fig. 5 is an operational front view in partial section of the burglarproof lock assembly in Fig. 3 showing the lock core being rotated;
Fig. 6 is a front view in partial section of the burglarproof lock assembly in Fig. 1 showing a key without a magnetic element inserted into the keyhole;
Fig. 7 is a front view in partial section of a conventional lock assembly in accordance with the prior art;
Fig. 8 is a side view in partial section of the conventional lock assembly in Fig. 7; and
Fig. 9 is a side view in partial section of the conventional lock assembly in Fig. 7 with a key inserted into a keyhole.

DETAILED DESCRIPTION OF PREFERRED EMBODIMENT

With reference to Figs. 1 and 2, a burglarproof lock assembly in accordance with the present invention comprises a casing (1), a lock core (2), multiple locking pin assemblies (3), a supplementary locking assembly (4) and a key (5).
The casing (1) has a core hole (11) and multiple outer chambers (12). The core hole (11) is formed longitudinally in the casing (1). The outer chambers (12) are formed radially in the casing (1), are arranged side by side and communicate with the core hole (11).
The lock core (2) is mounted rotatably in the core hole (11) of the casing (1) and has a front end, an outer surface, multiple inner chambers (21) and a keyhole (22). The inner chambers (21) are formed radially in the outer surface of the lock core (2) and align respectively with the outer chambers (12). The keyhole (22) is formed axially in the front end of the lock core (2) and communicates with the inner chambers (21).
The multiple locking pin assemblies (3) are mounted respectively in corresponding outer chambers (12) and inner chambers (21), and each locking pin assembly (3) has an outer block (31), an inner block (32), an outer spring (33) and a pressing block (34).
The outer block (31) is mounted slidably in corresponding outer chamber (12) and inner chamber (21), and each outer block (31) has an inner end, an outer end opposite to the inner end, a through hole (311), a recess (312), an outer pin (313) and an inner spring (314). The through hole (311) is formed in the outer end of the outer block (31). The recess (312) is formed in the inner end of the outer block (31) and communicates with the through hole (311). The outer pin (313) is mounted slidably in the recess (312) and the through hole (311) of the outer block (31) and protrudes out of the outer end via the through hole (311). The inner spring (314) is mounted in the recess (312) of the outer block (31) and abuts with and provides a force to the outer pin (313).
The inner block (32) is mounted slidably in the corresponding inner chamber (21) and selectively extends into the keyhole (22). The inner block (32) has an outer end, an inner end opposite to the outer end, a through hole (321), a recess (322) and an inner pin (323). The through hole (321) is mounted in the inner end of the inner block (32). The recess (322) is mounted in the outer end of the inner block (32) and communicates with the through hole (321). The inner pin (323) is mounted slidably in the recess (322) and the through hole (321) of the inner block (32) and selectively extends into the recess (312) of the outer block (31).
The outer spring (33) is mounted in the corresponding outer chamber (12) and abuts with and provides a fore to the outer block (31).
The pressing block (34) is mounted between the outer block (31) and the outer spring (33).
The supplementary locking assembly (4) is mounted in one of the outer chambers (12) and a corresponding inner chamber (22) and has a first block (41), an outer spring (43) and a second block (42).
The first block (41) is mounted slidably in the corresponding outer chamber (12) and inner chamber (21), and the first block (41) has an inner end and a locking recess (411) formed in the inner end of the first block (41). The outer spring (43) is mounted in the outer chamber (12) and abuts with and provide a pressing force to the first block (41).
The second block (42) is mounted slidably in the corresponding inner chamber (21), selectively extends into the keyhole (22), and has a holding recess (421), a locking pin (422) and a locking spring (423). The holding recess (421) is formed through the second block (42). The locking pin (422) is mounted slidably in the holding recess (421) and selectively extends into the locking recess (411) of the first block (41). The locking spring (423) is mounted in the holding recess (421) and abuts with and provides a force to the locking pin (422) to make the locking pin (422) engage the locking recess (411).
The key (5) has a contact surface, a cavity (51) and a magnetic element (52). The cavity (51) is formed in the contact surface of the key (5) and corresponds to the locking pin (422) when the key (5) is inserted into the keyhole (22). The magnetic element (52) is mounted in the cavity (51) of the key (5).
With reference to Figs. 3 to 5, when the key (5) is inserted into the keyhole (22), the outer blocks (31) and outer pins (313) are pushed out from the inner chambers (21) by the inner blocks (32) and inner pins (323). The first block (41) is also pushed out from the inner chamber (21) by the second block (42), but the locking pin (422) of the supplementary locking assembly (4) will be attracted by the magnetic element (52) on the key (5) to escape from the locking recess (411) in the first block (41). Consequently, the burglarproof lock assembly is unlocked.
With reference to Fig. 6, if a key (5A) without the magnetic element (52) is inserted into the keyhole (22), the locking pin (422) will be kept in the locking recess (411) of the first block (41) by the locking spring (423) so the burglarproof lock assembly is still at the locked condition. Accordingly, the burglarproof effect provided by the lock assembly is increased.

Claims

A burglarproof lock assembly comprising:
a casing (1) having
a core hole (11) formed longitudinally in the casing (1); and

multiple outer chambers (12) formed radially in the casing (1) and communicating with the core hole (11);

a lock core (2) mounted rotatably in the core hole (11) of the casing (1) and having
a front end;

an outer surface;

multiple inner chambers (21) formed radially in the outer surface of the lock core (2) and aligning respectively with the outer chambers (12); and

a keyhole (22) formed axially in the front end of the lock core (2) and communicating with the inner chambers (21); and

multiple locking pin assemblies (3), each locking pin assembly (3) mounted in one of the outer chambers (12) and a corresponding one of the inner chambers (21), and each locking pin assembly (3) having
an outer block (31) mounted slidably in a corresponding outer chamber (12) and a corresponding inner chamber (21);

an inner block (32) mounted slidably in the corresponding inner chamber (21) and selectively extending into the keyhole (22); and

an outer spring (33) mounted in the corresponding outer chamber (21) and abutting with the outer block (31), characterized in that the burglarproof lock assembly further comprises

a supplementary locking assembly (4) mounted in one of the outer chambers (12) and a corresponding inner chamber (22) and having
a first block (41) mounted slidably in the corresponding outer chamber (12) and the corresponding inner chamber (21) and having
an inner end; and

a locking recess (411) formed in the inner end of the first block (41);

an outer spring (43) mounted in the corresponding outer chamber (12) and abutting with the first block (41); and

a second block (42) mounted slidably in the corresponding inner chamber (21), selectively extending into the keyhole (22) and having
a holding recess (421) formed through the second block (42);

a locking pin (422) mounted slidably in the holding recess (421) and selectively extending into the locking recess (411) of the first block (41); and

a locking spring (423) mounted in the holding recess (421) and abutting with and providing a force to locking pin (422) to make the locking pin (422) engage the locking recess (411); and

a key (5) having
a contact surface;

a cavity (51) formed in the contact surface of the key (5) and corresponding to the locking pin (422) when the key (5) is inserted into the keyhole (22); and

a magnetic element (52) mounted in the cavity (51).
The lock assembly as claimed in claim 1, wherein
the outer block (31) of each locking pin assembly (3) has
an inner end;

an outer end opposite to the inner end;

a through hole (311) formed in the outer end of the outer block (31);

a recess (312) formed in the inner end of the outer block (31) and communicating with the through hole (311); and

an outer pin (313) mounted slidably in the recess (312) and the through hole (311) of the outer block (31); and

an inner spring (314) mounted in the recess (312) of the outer block (31) and abutting with the outer pin (313); and
each inner block (32) has
an outer end;

an inner end opposite to the outer end;

a through hole (321) formed in the inner end of the inner block (32);

a recess (322) formed in the outer end of the inner block (32) and communicating with the through hole (321); and

an inner pin (323) mounted slidably in the recess (322) and the through hole (321) of the inner block (32) and selectively extending into the recess (312) of the outer block (31).
The lock assembly as claimed in claim 1 or 2, wherein each locking pin assembly (3) further has a pressing block (34) mounted between the outer block (31) and the outer spring (33) of the locking pin assembly (3).