KR200473840Y1 - Door lock apparatus having a handle return device - Google Patents

Abstract

The present invention relates to a door lock apparatus having a handle return mechanism, and in particular, a handle shaft (13) extending through a door along a central axis direction at an outer handle (12) and coupled to an inner handle (32) And the rotor 24 of the lock assembly 20 engaging with the handle shaft 13 has a square cross section of the handle shaft 13 so as to cooperate with the outer circumferential surface of the handle shaft 13, And a return spring 40 for rotating and returning the handle shaft 13 to the lock position is inserted into the outer circumferential surface of the handle shaft 13 so that both ends thereof are engaged with the engaging rods 14a and 14b And is formed in a rectangular shape so that the coil part (41) cooperates with the outer circumferential surface of the handle shaft (13).

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a door lock device having a handle return mechanism,

The present invention relates to a door lock device, and in particular, to a door lock device having a handle return mechanism that interlocks with a simple engagement structure of a handle shaft and lock assemblies and resiliently returns the handle from a door lock position to a door lock position To a door lock device.

The door or front door is provided with a door locking device for locking and unlocking these doors. Such a door lock device includes a lock assembly inserted into a door including a latch bolt and a latch bolt operating mechanism for actuating the latch bolt, and a locking and unlocking operation of the lock assembly outside the door And an inner handle portion which is assembled to the inner side surface of the door so as to be able to operate the locking and unlocking operation of the lock assembly on the inner side of the door.

In the conventional door locking device, the handle provided on the inner side or the outer side of the door is rotated to the unlocking position, and when the handle is released, the handle is returned to the locking position by the elastic restoring force of the latch bolt return spring. That is, the rotational return operation of the handle is made only by the elastic restoring force in the linear direction of the latch bolt spring acting along the linear moving direction of the latch bolt.

Due to this structure, when the force of the latch bolt return spring is too weak or the spring force of the latch bolt return spring is relatively weak compared to the total weight of the latch bolt and the handle, the handle can not completely return to the predetermined lock position, The latch bolt interlocked with the handle also fails to return to the fully locked position, thereby causing the lock state of the door to become unstable. On the other hand, if the spring force of the latch bolt return spring is increased to accurately and steadily return the lock position of the handle, the tip inclined surface of the latch bolt is pressed against the door frame and is not smoothly pushed in. Cause.

In order to solve such a problem, in addition to the return spring of the latch bolt, a return spring for returning the rotation of the handle is mounted in Patent Document 1 filed and filed by the present applicant. However, according to the method disclosed in Patent Document 1, since a separate structure (reference numeral 48 in FIG. 8) for providing a handle return return spring (reference numeral 49 in FIG. 8) .

Further, in the case of the door lock apparatus of Patent Document 1, an arcuate groove 51b is formed in the operating piece (51 in Fig. 8) and an operating piece in order to switch the rotation of the handle to the operation for locking / unlocking the latch bolt. There is a drawback in that it requires a complicated structure.

KR 10-0932547 B1

In order to solve the above-mentioned problems of the conventional door locking device, the present invention has a simple structure that can interlock the rotation of the handle and the operation of the latch bolt, And a handle return mechanism capable of returning the door lock mechanism.

According to an aspect of the present invention, there is provided a door device comprising: an outer handle seat fixed to an outer side outer side of a door; an outer handle rotatably coupled to the outer handle seat; A handle shaft extending through the door along a central axis direction; an outer handle portion having a pair of engagement rods protruding from left and right sides of the handle shaft;

A latch bolt supported in the front sleeve by a resilient force of an elastic compression spring in an inside of the front sleeve, a latch bolt supported in a rear case so as to be rotatable about an axis in a rear case and rotated in association with a rotation operation of the handle shaft, A lock assembly including a rotor for sliding movement of the lock assembly;

An inner handle secured to the inner side outer side surface of the door; an inner handle rotatably coupled to the inner handle seat; and an end portion of the handle shaft extending through the lock assembly to interlock with the rotation of the handle shaft And an inner handle portion having a handle shaft engaging portion engaging with the engaging portion,

Wherein the handle shaft comprises a square bar having a rectangular cross-sectional shape,

Wherein the rotor and the inner and outer handle of the lock assembly have a square hole corresponding to a rectangular cross-sectional shape of the handle shaft to mate with an outer circumferential surface of the handle shaft,

And a return spring for rotating and returning the handle shaft to a lock position is fitted to the outer circumferential surface of the handle shaft. The return spring is wound in a quadrilateral shape so that the return spring is fitted and supported on a quadrangular outer circumferential surface of the handle shaft, And is supported by being hung on two connecting rods disposed on the side piece of the housing.

Further, the handle shaft is formed of a square bar having a square cross-sectional shape, and the coil portion of the return spring is formed in a square shape to match the square cross-sectional shape of the handle shaft.

On the other hand, the handle shaft may be formed of a square bar having a rectangular cross section, in which case the coil portion of the return spring is formed into a rectangular shape to coincide with the rectangular cross-sectional shape of the handle shaft.

Both ends of the return spring may extend in the same direction so as to be caught by one of the two connecting rods or both ends of the return spring may extend in opposite directions to each other, have.

As described above, according to the door lock apparatus provided with the handle return mechanism of the present invention, the rotation of the handle and the operation of the latch bolt can be performed without additional components or other coupling structures merely by the shape coupling of the handle shaft and the lock assembly. The structure can be simplified, and accurate locking and unlocking operations can be realized.

In addition, since the latch bolt and the handle can be accurately and completely returned to the locked position only by the rectangular torsion spring fitted to the outer periphery of the handle shaft, a separate spring end support structure It is possible to simplify the structure compared to the conventional structure to be provided, thereby improving the productivity of assembly and reducing the probability of occurrence of a failure.

1 is an exploded perspective view of a door lock apparatus provided with a handle return mechanism according to the present invention.
2 is a perspective view showing a state in which the handle return mechanism is assembled to the outer handle.
Fig. 3 is a view showing the operation state of the handle return mechanism according to the present invention step by step,
(a) shows the state of the return spring when the latch bolt is located at the lock position, and
(b) is a diagram showing a return-free operation state when the handle bolt is positioned at the unlock position by rotating the handle in the unlocking direction, and
(c) is a view showing the operating state of the return spring when the force acting on the handle is removed in the state (b).
4 is an exploded perspective view of a door lock device having another embodiment of a handle return mechanism according to the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an embodiment of a door lock apparatus having a handle return mechanism according to the present invention will be described in detail with reference to the accompanying drawings.

As shown in Figs. 1 and 2, a door locking device provided with a handle return mechanism according to the present invention includes an outer handle portion 10 provided on an outer side outer side surface of a door (not shown) A lock assembly 20 installed inside the door, and an inner handle 30 mounted on the inner side of the door.

The outer handle portion 10 includes an outer handle sheet 11 fixed to the outer side outer side of the door, an outer handle 12 rotatably installed in the center mounting hole of the outer handle sheet 11, And extends along the central axis direction at the outer handle 12 so as to rotate together with the rotation of the outer handle 12 and is formed to penetrate through the engagement hole 24a of the rotor 24, And a handle shaft 13 extending from the left and right sides of the handle shaft 13 and protruding from the through holes 23a and 23b of the rear case 23, And a pair of coupling rods 14a and 14b passing therethrough.

The coupling rods 14a and 14b are fastened to the inner handle sheet 31 with fastening screws 36a and 36b to fix the inner and outer handle sheets 11 and 31 to each other.

The lock assembly 20 includes a latch bolt 22 resiliently supported by a latch bolt spring (not shown) inside the sleeve-type front case 21, a rear case 23 formed of a rectangular shape, And a rotor (24) for slidingly moving the latch bolt (22) in the locking or unlocking direction while rotating in conjunction with the rotating operation of the handle shaft (13). A cover 25 is disposed at the tip of the latch bolt 22 of the lock assembly 20 and is coupled to the side surface of the door where the latch bolt 22 is exposed.

The inner handle portion 30 includes an inner handle seat 31 fixed to the inner side outer side surface of the door, an inner handle 32 rotatably coupled to the inner handle seat 31, And an inner handle portion (30) having a handle shaft engaging portion (33) that engages with the tip end of the handle shaft (13) extending through the lock assembly (20) .

According to a preferred embodiment of the present invention, the handle shaft 13 is formed of a rectangular rod having a square cross-sectional shape as shown in Figs. 1 and 2, and the engaging hole 24 of the rotor 24, Is formed into a square hole like the handle shaft 13 so as to cooperate with the handle shaft 13. Meanwhile, the handle shaft 13 may be formed of a square bar having a rectangular sectional shape as shown in FIG. In this case, the engaging hole 24 of the rotor 24 is formed as a rectangular hole like the handle shaft 13 so as to cooperate with the handle shaft 13 having the rectangular cross section.

With this simple structure, the rotation operation of the inner and outer handles 12 and 32 and the rotation operation of the rotor 24 of the lock assembly 20 are interlocked.

The door lock device of the present invention is characterized by having a return spring (40) for rotating and returning the handle shaft (13) to the locked position. 1 and 2, the return spring 40 is fitted to the outer circumferential surface of the handle shaft 13 and is supported by the outer circumferential surface of the handle shaft 13 of the square cross section, And both ends 42a and 42b are installed so as to be caught and supported by the two coupling rods 14a and 14b disposed on the side of the return spring 40. In other words,

4, the return spring 40 is wound in a rectangular shape so that the return spring 40 is fitted and held on the outer circumferential surface of the handle shaft 13 of the rectangular cross section, and the both ends 42a And 42b are mounted to be supported by the two coupling rods 14a and 14b disposed on the side of the return spring 40. [ The remaining structures are the same as those of the embodiment shown in FIGS. 1 and 2, and a description thereof will be omitted.

Although not shown at both ends of the return spring 40, it is also possible to extend in opposite directions so that the respective ends of the return spring 40 are supported by the two connecting rods.

The operation of the present invention will be described with reference to FIG.

3 (a), when the latch bolt 22 is in the door lock state, the outer handle 11 or the inner handle 31 is in the locked position. 3 (b), the handle shaft 13 is rotated in the unlocking direction (the direction of the small black arrow) by rotating the outer handle 11 or the inner handle 31 in the unlocking direction (The coarse black arrow direction) while pulling the latch bolt 22 into the front case 21 to unlock the door.

Then, when the handle 11, 31 that has been rotated is released, the return spring 40 is elastically restored while rotating the handle shaft 13 supported inside the coil section 41 in the locking direction (the direction indicated by the thick solid line arrow) Thereby returning the latch bolt 22 to the locked position.

In this way, even when the force of the latch bolt spring for returning the latch bolt 22 is weak or the slide bolt is not smoothly moved by the foreign matter, the return spring 40 returns directly to the lock position by the elastic restoring force So that a stable return operation is performed.

In particular, since the latch bolt and the handle can be accurately and completely returned to the locked position only by the rectangular torsion springs inserted into the outer periphery of the handle shaft, a separate spring end supporting structure It is possible to simplify the structure as compared with the conventional structure in which the semiconductor device is required to be provided, thereby improving the productivity of assembly and reducing the probability of failure occurrence.

10: outer handle portion 11: outer handle sheet
12: outer handle 13: handle shaft
14a, 14b: Coupling rod 20: Lock assembly
21: front case 22: latch bolt
23: rear case 23a, 23b: through hole
24: rotor (24) 24a: engaging hole
25: cover 30: inner handle portion
31: inner handle seat 32: inner handle
33: handle shaft coupling portion 36a, 36b: fastening screw
40: return spring 41: coil part
42a, 42b:

Claims (4)

An outer handle sheet 11 fixed to the outer side outer side of the door, an outer handle 12 rotatably coupled to the outer handle seat 11, A handle shaft 13 extending through the door along the central axis direction in the handle 12 and a pair of coupling rods 14a and 14b projecting from the left and right sides of the handle shaft 13, An outer handle portion (10); A latch bolt 22 which is resiliently supported by a latch bolt spring inside the front case 21 and a latch bolt 22 which is rotatably supported by the rear case 23 so as to be rotatable about an axis, A lock assembly (20) including a rotor (24) slidably moving the lock assembly (22) in a locked or unlocked direction; An inner handle (31) fixed to the inner side outer side surface of the door, an inner handle (32) rotatably coupled to the inner handle seat (31) And an inner handle portion (30) having a handle shaft engaging portion (33) engaging with a distal end of the handle shaft (13) extending through the lock assembly (20), the door lock device
The handle shaft 13 is made of a square bar having a rectangular cross-sectional shape,
The rotor 24 of the lock assembly 20 has a rectangular hole 24a corresponding to the rectangular cross-sectional shape of the handle shaft 13 to cooperate with the outer circumferential surface of the handle shaft 13,
A return spring 40 for rotating and returning the handle shaft 13 to the locked position is fitted to the outer circumferential surface of the handle shaft 13 and the return spring 40 is fitted to the outer peripheral surface of the handle shaft 13 And the both ends 42a and 42b are hooked on and supported by the two coupling rods 14a and 14b disposed on the side of the return spring 40. [ A door lock device having a return mechanism. The method according to claim 1,
Characterized in that the handle shaft (13) is made of a square rod having a square cross-sectional shape and the coil part (41) of the return spring (40) is formed in a square shape so as to coincide with the square cross- A door lock device having a return mechanism. The method according to claim 1,
The handle shaft 13 is formed of a rectangular bar having a rectangular cross section and the coil part 41 of the return spring 40 is formed in a rectangular shape so as to cooperate with the rectangular cross- Wherein the door lock mechanism includes a handle return mechanism. The method according to claim 1,
Both ends 42a and 42b of the return spring 40 extend in the same direction and are supported on opposite sides of one of the coupling rods 14a and 14b of the two coupling rods 14a and 14b Wherein the door lock mechanism includes a handle return mechanism.

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