Patent Application
20090188283
The present invention relates to locks, and in particular to a safety and burglarproof lock. A teethed wheel of the handle seat of the lock has a teethed protrusion and a rectangular hole for combining with a lock core, a head or a handle so as to have the function of opening or closing a door,
The general lock has a complicate structure so that the cost is high and the assembly work is tedious. Furthermore the precision in assembly is high. This further increases the cost in labor and cost. Furthermore too many parts are used and are easy to wear. Moreover, the destroy of any part will make the whole lock being malfunction so as to lose the function of burglarproof.
Therefore, there is an eager demand for a novel one to improve the defect in the prior art.
Accordingly, the primary object of the present invention is to provide a safety and burglarproof lock comprising a handle seat which is installed with a teethed wheel and a latched. With the installing of a lock core and a head, the cost can be reduced and the assembled speed is increased with less faults.
To achieve above objects, the present invention provides a safety and burglarproof lock comprising a handle seat having a front sheet, a rear sheet, two lateral sheets; each of the front sheet and rear sheet having at least one lock hole; each of the two lateral sheets having a slot, each of the front, rear and lateral sheets having a plurality of through holes; a teethed wheel having a teethed protrusion, a protrusion cylinder protruded from a front end of the teethed protrusion and a post protruded from the front end of the teethed protrusion and aside the protrusion cylinder; the teethed wheel having a rectangular hole; the protrusion cylinder being engaged to the through hole of the front sheet; a latch having a guide groove and a stud; an elastic unit for connecting the stud and the post; a lock core having a keyhole and outer threads; the keyhole serving for receiving a key; one side of the lock core having an actuating block; the lock core having a locking hole; the actuating block being locked into the locking hole of the lock core; a horizontal handle having a spindle which is engaged to the rectangular hole of the teethed wheel; wherein when the horizontal handle is driven, the post of the teethed wheel will move in the guide groove of the latch so that the latch moves to protrude out or reduced into the handle seat to have the effect of latching or opening the door.
The various objects and advantages of the present invention will be more readily understood from the following detailed description when read in conjunction with the appended drawing.
In order that those skilled in the art can further understand the present invention, a description will be provided in the following in details. However, these descriptions and the appended drawings are only used to cause those skilled in the art to understand the objects, features, and characteristics of the present invention, but not to be used to confine the scope and spirit of the present invention defined in the appended claims.
Referring to
A handle seat 1 has a front sheet, a rear sheet, two lateral sheets. Each of the front sheet and rear sheet has at least one lock hole 11. Each of the two lateral sheets has a slot 12, Each of the front, rear and lateral sheets has a plurality of through holes 13 and the rear sheet has a plurality of rivets 14.
A teethed wheel 2 has a teethed protrusion 22, a protrusion cylinder 21 protruded from a front end of the teethed protrusion 22 and a post 23 protruded from the front end of the teethed protrusion 22 and aside the protrusion cylinder 21. The teethed wheel 2 has a rectangular hole 24 The protrusion cylinder 21 is engaged to the through hole 13 of the front sheet.
A latch 3 has a guide groove 31 and a stud 32. The rivets 14 of the handle seat 1 serve to lock the latch 3 to the handle seat 1.
An elastic unit 4 serves to connect the stud 32 and the post 23.
A lock core 5 has a keyhole and outer threads. The keyhole serves for receiving a key 51. One side of the lock core 5 has an actuating block 52. The lock core 5 has a locking hole. The actuating block 52 is locked into the locking hole of the lock core 5.
A horizontal handle 6 has a spindle 61 which is engaged to the rectangular hole 24 of the teethed wheel 2. Referring to
Referring to
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Advantages of the present invention will be described herein. The structure of the present invention is easy. The assembly is simple and it can be produced massively. The lock core and lock head is replaceable. Furthermore the cost is low.
The present invention is thus described, it will be obvious that the same may be varied in many ways. Such variations are not to be regarded as a departure from the spirit and scope of the present invention, and all such modifications as would be obvious to one skilled in the art are intended to be included within the scope of the following claims.
