Patent Application
20050127691
1. Field of the Invention
The present invention relates to an inside rose liner for a lock. In particular, the present invention relates to a lock with improved torque-resistant capacity.
2. Description of the Related Art
A typical door lock includes a main body having an inside seat and an outside seat, an inside rose liner securely mounted to the inside seat, an outside rose liner securely mounted to the outside seat, an inside rose, an outside rose, an inside handle, and an outside handle. The inside handle and the outside handle of lever type are convenient to the disabled. The inside seat includes two diametrically disposed grooves, and the inside rose liner includes two diametrically disposed protrusions respectively engaged in the grooves of the inside seat. Similar design is adopted in the outside seat and the outside rose liner. The door lock of such a structure is simple and has a low manufacture cost. Nevertheless, the torque resulting from the force applied to the lever type handle for opening the door is relatively greater than that of a knob type handle. The simple engagement of the grooves and protrusions between the respective rose liner and the respective seat is insufficient to resist the torque if lever type handles are used. As a result, the inner parts of the door lock using lever type handles are apt to be damaged.
U.S. Pat. No. 6,364,383 discloses an easy-to-install door lock with burglar-proof effect for the outside rose assembly, wherein each of the inside seat and the outside seat of the main body of the door lock includes two diametrically disposed flat surfaces. Further, the inside rose liner includes a threaded inner periphery for threadedly engaging with an outer threading of the inside seat. An anti-torque ring is engaged on the outside seat for improving the torque-bearing capacity. The anti-torque ring includes a central hole having two diametrically disposed flat sections, allowing the anti-torque ring to be mounted around the outside seat without the risk of relative rotation and providing improved burglar-proof effect. An adjusting sleeve is threadedly engaged with the outside seat, with an end of the adjusting sleeve being securely engaged with a central stepped portion of the outside rose, and with the other end of the adjusting sleeve abutting against the anti-torque ring to thereby retain the anti-torque ring in place.
However, the adjusting sleeve of the door lock disclosed in U.S. Pat. No. 6,364,383 has to be cylindrical, and the outside rose must be processed to form the central stepped portion for receiving the end of the cylindrical adjusting sleeve. The design flexibility of the outside rose is limited. Further, it is difficult to provide the cylindrical adjusting sleeve with high strength. Thus, the strength of the whole lock structure is limited.
An object of the present invention is to provide a lock with increased torque-resistant capacity while allowing design flexibility of an outside rose of the lock.
In accordance with an aspect of the present invention, a lock includes a main body having an inside seat and an outside seat. An inside rose liner is mounted around the inside seat and includes a central hole. A peripheral wall delimiting the central hole of the inside rose liner includes at least one pair of notches. A reinforcing ring is mounted round the inside seat and inside the inside rose liner. The reinforcing ring includes two tabs each having a distal end received in a respective groove of the inside seat, preventing relative rotation between the reinforcing ring and the main body. An outside rose liner is mounted around the outside seat. Two positioning posts extend from an inner side of the outside rose liner, with each positioning post having a screw hole. Two fasteners extend through the reinforcing ring and the inside rose liner into the screw holes of the positioning posts, thereby securing the reinforcing ring, the inside rose liner, and the outside rose liner together. The torque-resisting capacity is thus improved.
Other objects, advantages, and novel features of the invention will become more apparent from the following detailed description when taken in conjunction with the accompanying drawings.
Referring to
The main body 5 includes an inside seat 511 and an outside seat 512. The inside seat 511 includes a threaded section 513 having an outer threading 514. The outside seat 512 includes a threaded section 517 having an outer threading 518. A transmission assembly 52 is mounted inside the main body 5 and includes a spindle 521 and a retractor 522 operably connected to the spindle 521. Two ends of the spindle 521 are respectively connected to the inside handle 31 and the outside handle 41. Turning of either handle 31, 41 causes movement of the retractor 522, which, in turn, causes retraction of a latch bolt 21 of a latch assembly 2, which is conventional. Of course, the spindle 521 may consist of two sections respectively attached to the inside handle 31 and the outside handle 41.
The inside seat 511 includes two diametrically disposed screw holes (not shown), with two screws 515 extending through the screw holes of the inside seat 511 into screw holes (not shown) in the outside seat 512, thereby securely connecting the inside seat 511 and the outside seat 512 together. Further, the threaded section 513 of the inside seat 511 includes two diametrically disposed groove 516 respectively aligned with the screw holes of the inside seat 511, allowing easy mounting of the screws 515.
An outside rose liner 6 is mounted inside the outside rose 42 and around the outside seat 512. The outside rose liner 6 includes a central hole 61 having an inner threading 610 for threadedly engaging with the outer threading 518 of the outside seat 512. Two positioning posts 62 extend from an inner side of the outside rose liner 6 and extend through two positioning holes 92 in the door 9.
The inner rose liner 7 is mounted inside the inside rose 32 and around the inside seat 511. The inside rose liner 7 includes a central hole 71 threadedly engaged with the outer threading 514 of the inside seat 511. A peripheral wall 70 delimiting the central hole 71 includes a plurality of pairs of notches 711. One of the pairs of notches 711 is selectively aligned with the grooves 516 of the threaded section 513. Further, the inside rose liner 7 includes a plurality of pairs of through-holes 712, with one of the plurality of pairs of through-holes 712 being selectively aligned with the screw holes 621 of the positioning posts 62.
A reinforcing ring 8 is mounted inside the inside rose liner 7. As illustrated in
In assembly, as illustrated in
The inside rose liner 7 and the outside rose liner 6 are adjustably mounted on the inside seat 511 and the outside seat 512, respectively, allowing the lock in accordance with the present invention to be used with doors of different thicknesses. The reinforcing ring 8 cannot be turned relative to the main body 5, as the end piece 821 of the respective tab 82 of the reinforcing ring 8 is received in the respective groove 516 of the threaded section 513. The torque-resisting capacity is increased. Further, since the inside rose liner 7, the outside rose liner 6, and the reinforcing ring 8 are fixed together to securely fix the main body 5 to the door 9, the overall strength of the lock in accordance with the present invention is improved, and the engagement between the main body 5 and the door is more reliable. Further, the inside rose 32 and the outside rose 42 require no processing, providing design flexibility for the inside rose 32 and the outside rose 42; namely, the inside rose 32 and he outside rose 42 can be of any desired shapes, while the inside rose liner 7 and the reinforcing ring 8 provide the lock with improved strength and increased torque-resisting capacity.
Although the invention has been explained in relation to its preferred embodiment, it is to be understood that many other possible modifications and variations can be made without departing from the scope of the invention as hereinafter claimed.
