WO2008147118A2

WO2008147118A2 - Door lock device

Info

Publication number: WO2008147118A2
Application number: PCT/KR2008/003012
Authority: WO
Inventors: Hong-Sik Koo
Original assignee: Techsumer Co., Ltd.
Priority date: 2007-05-31
Filing date: 2008-05-29
Publication date: 2008-12-04
Also published as: KR20080065515A; WO2008147118A3

Abstract

Provided is a door lock device capable of readily unlocking a door from the inside in an emergency and readily locking the door from the inside. The door lock device includes a housing installed at a door, a deadbolt installed in the housing and linearly movable in a direction projecting from and inserting into the housing to lock and unlock the door, a first rotary member rotatably coupled to the housing and connected to the deadbolt such that the deadbolt moves linearly in a direction inserting the housing depending on rotation thereof and a second rotary member rotatably coupled to the housing, relatively rotatable with respect to the first rotary member, and connected to the deadbolt such that the deadbolt moves linearly in a direction projecting from the housing depending on rotation thereof.

Description

Description DOOR LOCK DEVICE

Technical Field

[1] The present invention relates to a door lock device, and more particularly, to a door lock device for locking and unlocking a door. Background Art

[2] In general, door lock devices are widely used in general houses or public buildings.

Typically, the door lock devices are used in front doors, safes in banks, and access control systems for restricting access to specified places.

[3] Such a door lock device generally includes a housing installed at a door, a latchbolt projecting from and inserting into the housing, and a deadbolt projecting from and inserting into the housing to lock and unlock the door. In addition, the deadbolt is driven by rotation of a motor to lock and unlock the door. Further, a button for operating the motor, a knob for locking the door, and a rotatable handle are coupled to an inner part of the door.

[4] When a user wants to open the door and go out, the user can push the button to operate the motor and rotate the handle to open the door. That is, the user performs a primary operation for moving the deadbolt to open the door, for example, an operation for pushing the button, and then, performs a secondary operation for rotating the handle or grip.

[5] In addition, the user rotates the knob to drive the motor and the deadbolt linked to the motor to lock the door from the inside.

[6] However, in an emergency, for example, when a fire or earthquake occurs, a person who is inside may panic. As a result, the user performs only a secondary operation of rotating the handle, and does not perform the primary operation of pushing the button to unlock the door. Therefore, the door cannot be opened and the person inside may suffer harm.

[7] Further, since the door lock device is configured such that a rotational force of the knob is transmitted to the deadbolt through a gear and the motor, in order to lock the door, the gear and the motor should be rotated with the knob. Therefore, it takes a considerable amount of force to lock the door and the motor may be damaged. Disclosure of Invention

Technical Problem

[8] An aspect of the present invention is to provide a door lock device capable of readily unlocking a door from the inside in an emergency and readily locking the door from the inside. Technical Solution

[9] An embodiment of the invention provides a door lock device including: a housing installed at a door; a deadbolt installed in the housing and linearly movable in a direction projecting from and inserting into the housing to lock and unlock the door; a first rotary member rotatably coupled to the housing and connected to the deadbolt such that the deadbolt moves linearly in a direction inserting the housing depending on rotation thereof; and a second rotary member rotatably coupled to the housing, relatively rotatable with respect to the first rotary member, and connected to the deadbolt such that the deadbolt moves linearly in a direction projecting from the housing depending on rotation thereof.

Advantageous Effects

[10] According to the present invention, since a door can be locked and unlocked by only rotating an inside handle, it is possible for a person inside in an emergency to readily unlock the door to escape to outside and to readily lock the door. [11] In addition, when the door is locked and unlocked using the inside handle, since the inside handle is independently operated, not linked to a motor, the inside handle can be readily rotated and damage to the motor can be prevented.

Brief Description of the Drawings [12] The above and other objects, features and advantages of the present invention will be more apparent from the following detailed description taken in conjunction with the accompanying drawings, in which: [13] FIG. 1 is an exploded perspective view of a door lock device in accordance with an exemplary embodiment of the present invention;

[14] FIG. 2 is an exploded perspective view of a mortise part shown in FIG. 1;

[15] FIG. 3 is a partial cross-sectional view of an inner structure of the mortise part of

FIG. 1; [16] FIG. 4 is a partial cross-sectional view of the mortise part of FIG. 3, showing a door being unlocked by a first rotary member; [17] FIG. 5 is a partial cross-sectional view of the mortise part of FIG. 3, showing the door being locked by a second rotary member; and [18] FIGS. 6 and 7 are cross-sectional views taken along line VI-VI of FIG. 3, showing a process of unlocking the door using the first rotary member. [19]

Mode for the Invention [20] Hereinafter, exemplary embodiments of the present invention will be described with reference to the accompanying drawings. [21] Referring to FIGS. 1 to 7, a door lock device 1 in accordance with an exemplary embodiment of the present invention includes an indoor unit 100, an outdoor unit 200, and a mortise unit 300.

[22] The indoor unit 100 includes an indoor housing 110 coupled to an indoor part of a door 2, and an inside handle 120 pivotally coupled to the indoor housing 110. The inside handle 120 has a handle pin 130 fixed thereto. The handle pin 130 is rotated about a rotational center shaft Cl of the inside handle 120. In addition, the inside handle 120 is resiliently biased by a torsion spring (not shown) to return to its original state when the inside handle 120 is rotated and then released.

[23] The outdoor unit 200 includes an outdoor housing 210 coupled to an outdoor part of a door 2, an outside handle 220 pivotally coupled to the outdoor housing 210, and a keypad 211. The outside handle 220 has a rotary pin 320 fixed thereto, and the rotary pin 230 is rotated with the outside handle 220 upon rotation of the outside handle 220.

[24] The mortise unit 300 is installed in the door 2. The mortise part 300 includes a housing 310, a deadbolt 320, an intermediate member 330, a main rotary member 340, a first rotary member 350, and a second rotary member 360.

[25] The housing 310 is inserted into the door 2 not to project from or enter a side surface of the door 2 shown by an imaginary line in FIG. 1. The housing 310 includes a case 311, a front plate 312, and a cover 313, which are coupled to each other. The front plate 312 has a deadbolt through-hole 312a. In addition, the case 311 has a first stopper 31 Ia, a second stopper 31 Ib, and a post 31 Ic. A motor 314 and a gear 316 installed at an output shaft 315 of the motor 314 are installed in the case 311.

[26] The deadbolt 320 is installed in the housing 310 to be linearly movable in a direction projecting from and inserting into the housing 310. As shown in FIG. 3, the deadbolt 320 is inserted into a deadbolt receiving hole 3a formed in a doorpost 3 through the deadbolt through-hole 312a to lock the door 2, and as shown in FIG. 4, the deadbolt 320 is separated form the deadbolt receiving hole 3a to unlock the door 2. A fixing member 321 is coupled to the deadbolt 320 by a bolt. The fixing member 321 has a cylindrical coupling hole 322.

[27] The deadbolt 320 is resiliently biased by a torsion spring 323 in a direction projecting from and inserting into the housing 310 when the door is locked and unlocked. One end of the torsion spring 323 is fixed to the post 31 Ic, and the other end of the torsion spring 323 is fixed to a post 336 projecting from the intermediate member 330, which will be described.

[28] The intermediate member 330 is coupled to the deadbolt 320 to linearly move with the deadbolt 320 with respect to the housing 310. The intermediate member 330 includes a hinge part 331 having a shape corresponding to the coupling hole 322 of the fixing member 321 to be inserted into the coupling hole 322, a plate part 332 extending from an end of the hinge part 331 in a movement direction of the deadbolt 320, and a pressure-receiving projection 333 extending from one side of the plate part 332 in a thickness direction of the door 2. In addition, the pressure-receiving projection 333 has a first slope part 334 and a second slope part 335 extending from both sides thereof, which are sloped with respect to the movement direction of the deadbolt 320.

[29] As described above, since the hinge part 331 of the intermediate member 330 is inserted into the coupling hole 322 of the fixing member 321, the hinge part 331 can be rotated in the coupling hole 322 within a certain angle, and thus, the intermediate member 330 can be rotated between a first position shown in FIG. 6 and a second position shown in FIG. 7. At the first position and the second position, the plate part 332 is stopped by the fixing member 321 such that the intermediate member 330 cannot be rotated any more. In addition, the intermediate member 330 is resiliently biased by a torsion spring 337 in a direction approaching the main rotary member, which will be described. One side of the torsion spring 337 is welded to the fixing member 321, and the other side of the torsion spring 337 is in contact with the plate part 332 to press the plate part 332 against the main rotary member.

[30] The main rotary member 340 is rotatably installed in the housing 310. The main rotary member 340 includes a groove 341, a first pressing part 342, a second pressing part 343, and a gear part 344.

[31] The groove 341 is formed in an outer surface of the main rotary member 340. The pressure-receiving projection 333 is inserted into the groove 341.

[32] The first pressing part 342 and the second pressing part 343 are formed at both sides of the groove 341 to oppose each other. The pressure-receiving projection 333 is disposed between the first pressing part 342 and the second pressing part 343. The first pressing part 342 and the second pressing part 343 press the pressure-receiving projection 333 of the intermediate member 333 upon rotation of the main rotary member 340 to linearly move the deadbolt 320 in a direction projecting from or inserting into the housing 310. That is, in a state shown in FIG. 3, when the main rotary member 340 is rotated in one direction, i.e., clockwise, the first pressing part 342 presses the pressure-receiving projection 333 of the intermediate member 330 to linearly move the intermediate member 300 and the deadbolt 320 to the right such that the deadbolt 320 enters the housing 310 and unlocks the door 2. At this time, the first pressing part 342 directly presses the pressure-receiving projection 333 projecting in a direction perpendicular to the movement direction of the intermediate member 330. Therefore, no rotational force is generated required to rotate the intermediate member 330 about the hinge part 331 and thus, the intermediate member 330 cannot be rotated. In addition, in a state in which the door 2 is locked, when the main rotary member 340 is rotated in a direction opposite to the one direction, i.e., counterclockwise, the second pressing part 343 presses the pressure-receiving projection 333 of the intermediate member 330 to linearly move the intermediate member 330 and the deadbolt 320 to the left such that the deadbolt 320 projects from the housing 310 and locks the door 2.

[33] The gear part 344 is formed at an outer surface of the main rotary member 340, and includes a plurality of teeth. Here, the plurality of teeth form an arc shape. The gear part 344 is meshed with a gear 316 coupled to the output shaft 315 of the motor 314. Therefore, upon driving the motor 314, the main rotary member 340 is rotated clockwise or counterclockwise.

[34] In addition, the main rotary member 340 has insertion holes 345 and 346, into which the handle pin 130 and the rotary pin 230 are inserted, respectively. The insertion holes 345 and 346 have an arc shape. Inner walls of the insertion holes 345 and 346 are not in contact with the handle pin 130 and the rotary pin 230 upon rotation of the handle pin 130 and the rotary pin 230.

[35] The first rotary member 350 is disposed to oppose the main rotary member 340 in a thickness direction of the door 2. The first rotary member 350 is coupled to the housing 310 to be rotatable with respect to the housing 310. The first rotary member 350 is coaxially aligned with the main rotary member 340 and the inside handle 120. The first rotary member 350 includes a first body 351 and a first push part 355.

[36] The first body 351 has a plate shape. The first body 351 has a first insertion groove

352, and first insertion projections 353. The first insertion groove 352 has an arc shape. The first insertion projections 353 project from both surfaces of the first body 351 in the thickness direction of the door 2. In addition, the first body 351 has a coupling hole

354 into which a rotary body is inserted, which will be described.

[37] The first push part 355 extends from one side of the first body 351 in a direction perpendicular to the thickness direction of the door 2. The first push part 355 is disposed to oppose the first slope part 334 of the intermediate member 330. The first push part

355 presses the first slope part 334 of the intermediate member 330 to rotate the intermediate member 330 to the second position upon rotation in one direction of the first rotary member 350, i.e., clockwise rotation. In addition, when the first rotary member 350 is continuously rotated in a state in which the intermediate member 330 is rotated, the first push part 355 presses the pressure-receiving projection 333 to linearly move the intermediate member 330 in the inserting direction of the deadbolt 320. Since the first push part 355 is in contact with the first stopper 311a, counterclockwise rotation of the first rotary member 350 is limited.

[38] The second rotary member 360 is disposed to oppose the main rotary member 340 in the thickness direction of the door 2. The second rotary member 360 is rotatably installed in the housing 310. The second member 360 includes a second body 361, and a second push part 365.

[39] The second body 361 has a plate shape. The second body 361 has a second insertion groove 362, and second insertion projections 363. The second insertion groove 362 has an arc shape. The second insertion projections 363 project from both surfaces of the second body 361 in the thickness direction of the door 2. In addition, the second body 361 has a coupling hole 364 into which a rotary body is inserted, which will be described.

[40] The second push part 365 extends from one side of the second body 361 in a direction perpendicular to the thickness direction of the door 2. The second push part 365 is disposed to oppose the second slope part 335 of the intermediate member 330. The second push part 365 presses the second slope part 335 of the intermediate member 330 to rotate the intermediate member 330 to the second position upon rotation in a direction opposite to one direction of the second rotary member 360, i.e., counterclockwise rotation. In addition, when the second rotary member 360 is continuously rotated in a state in which the intermediate member 330 is rotated, the second push part 365 presses the pressure-receiving projection 333 to linearly move the intermediate member 330 in the projecting direction of the deadbolt 320. Since the second push part 365 is in contact with the second stopper 31 Ib, clockwise rotation of the second rotary member 360 is limited.

[41] In addition, the second rotary member 360 is relatively rotatably disposed with respect to the first rotary member 350. Since the first insertion projection 353 is inserted into the second insertion groove 362 and the second insertion groove 362 is configured to include a rotation path of the first insertion projection 353, the first insertion projection 353 is not locked by the second insertion groove 362 upon rotation of the first insertion projection 353. Since the second insertion projection 363 is inserted into the first insertion groove 352 and the first insertion groove 352 is configured to include a rotation path of the second insertion projection 363, the second insertion projection 363 is not locked by the first insertion groove 352 upon rotation of the second insertion projection 363. The second body 361 is in contact with the first body 351, and the first push part 355 and the second push part 365 are disposed on the same plane. Further, the first rotary member 350 is coaxially aligned with the second rotary member 360.

[42] Furthermore, the handle pin 130 is disposed between the first insertion projection

353 and the second insertion projection 363. Therefore, since the handle pin 130 is rotated clockwise to press the first insertion projection 353 upon clockwise rotation of the inside handle 120, the first rotary member 350 is rotated clockwise. In addition, since the handle pin 130 is rotated counterclockwise upon counterclockwise rotation of the inside handle 120 to press the second insertion projection 363, the second rotary member 360 is rotated counterclockwise.

[43] Further, a resilient member is coupled to the first rotary member 350 and the second rotary member 360 to resiliently bias the first rotary member 350 and the second rotary member 360 such that the first push part 355 and the second push art 365 are spaced apart from each other. In particular, in this embodiment, the resilient member is a torsion spring 370. The torsion spring 370 is inserted into a rotary body 380, which will be described. One end of the torsion spring 370 is in contact with and supported by the first insertion projection 353, and the other end of the torsion spring 370 is in contact with and supported by the second insertion projection 363. Therefore, the first rotary member 350 is resiliently biased to be rotated counterclockwise and the second rotary member 360 is resiliently biased to be rotated clockwise, by the torsion spring 370.

[44] The rotary body 380 is rotatably installed at the housing 310. That is, both ends of the rotary body 380 are inserted into the case 311 and the cover 313. The main rotary member 340, the first rotary member 350 and the second rotary member 360 are inserted into the rotary member 380.

[45] In the door lock device 1 as constituted above, in a state in which the door 2 is locked as shown in FIG. 3, when a user inputs predetermined identification numbers into the keypad 211 installed at the outdoor housing 210 to drive the motor 314, the main rotary member 340 is rotated. In addition, since the first pressing part 342 of the main rotary member 340 presses the pressure-receiving projection 333 during rotation of the main rotary member 340, the deadbolt 320 moves in a direction inserting into the housing 310 to unlock the door 2. Further, since the main rotary member 340, the first rotary member 350 and the second rotary member 360 are spaced apart from each other in the thickness direction of the door 2, the first pressing part 342 is not locked by the first push part 355 and the second push part 365 during rotation of the main rotary member 340. Therefore, the first rotary member 350 and the second rotary member 360 are not rotated during rotation of the main rotary member 340.

[46] In addition, in a state in which the door 2 is locked as shown in FIG. 3, when a user turns clockwise the inside handle 120 to open the door 2, the handle pin 130 coupled to the inside handle 120 is rotated clockwise with the inside handle 120 to press the first insertion projection 353, thereby rotating the first rotary member 350 clockwise. During rotation of the first rotary member 350, the first push part 355 presses the first slope part 334 of the intermediate member 330. At this time, a rotational force is generated to rotate the intermediate member 330 about the hinge part 331 to the second position. Then, when the first rotary member 350 is continuously rotated in a state in which the intermediate member 330 is rotated, the first push part 355 presses the pressure-receiving projection 333 of the intermediate member 330 to linearly move the intermediate member 330 in the direction inserting into the deadbolt 320, thereby unlocking the door as shown in FIG. 5. [47] Further, since the intermediate member 330 linearly moves in the rotated state, as shown in FIGS. 6 and 7, during straight movement of the intermediate member 330, the pressure-receiving projection 333 of the intermediate member 330 is not locked by the second pressing part 343 of the main rotary member 340 so that the main rotary member 340 is not rotated. Therefore, it is possible to prevent problems caused when the main rotary member 340 and the motor 314 coupled thereto are rotated with the first rotary member 350. For example, it is possible to prevent the problem of it taking considerable force to rotate the inside handle 120, which risks causing damage to the motor 314 due to manual rotation of the motor 314 by an external force.

[48] In addition, a user can rotate the inside handle 120 to lock the door 2 from inside.

That is, when the user pivots the inside handle 120 counterclockwise in a state in which the door 2 is unlocked as shown in FIG. 4, the handle pin 130 coupled to the inside handle 120 is rotated with the inside handle 120 counterclockwise to press the second insertion projection 363, thereby rotating the second rotary member 360 counterclockwise. During rotation of the second rotary member 360, the second push part 365 presses the second slope part 335 of the intermediate member 330. At this time, a rotational force is generated to rotate the intermediate member 330 to the second position. Further, when the second rotary member 360 is continuously rotated in a state in which the intermediate member 330 is rotated, the second push part 365 presses the pressure-receiving projection 333 of the intermediate member 330 to linearly move the intermediate member 330 in the projecting direction of the deadbolt 320, thereby locking the door 2 as shown in FIG. 5.

[49] As described above, in the embodiment, the door 2 can be unlocked by only rotating the inside handle 120. Therefore, in an emergency, for example, when a fire or earthquake occurs, even though a person inside may panic, the person can readily escape to outside by only rotating the inside handle 120. As a result, it is possible to eliminate the danger of casualties. In addition, when the inside handle 120 is rotated in a direction opposite to the unlocking direction of the door 2, the door 2 can be locked.

[50] Moreover, while the inside handle 120 is rotated to lock and unlock the door 2 from inside, since the intermediate member 330 linearly moves in the rotated state, the pressure-receiving projection 333 is not in contact with the first pressing part 342 and the second pressing part 343. Therefore, the inside handle 120 can be readily rotated. Motor can not be drived upon rotation of the inside handle 120, so damage to the motor 314 can be prevented even though the inside handle 120 is rotated. In particular, when a user rotates the inside handle 120 in the unlocking rotation of the door 2 while the door 2 is locked by the motor 314, i.e., when the main rotary member 340 and the first rotary member 350 are rotated in opposite directions, since rotation of the intermediate member 330 separates a rotational path of the pressure-receiving projection 333 from a rotational path of the second pressing part 343, a rotational force in a direction opposite to the driving direction of the motor 314 is applied through the pressure-receiving projection 333 to prevent damage to the motor 314.

[51] In addition, in order to lock and unlock the door 2 from inside using the inside handle

120, two rotary members, i.e., the first rotary member 350 and the second rotary member 360, are configured to rotate relative to each other, thereby reducing a rotational range of the rotary members. Therefore, it is possible to reduce a space required for operating the first rotary member 350 and the second rotary member 360 and effectively use an inner space of the housing 310.

[52] In this embodiment, while the intermediate member has been described to include the first and second slope parts, the first rotary member and the second rotary member may include the first and second slope parts, respectively.

[53] While this invention has been described with reference to exemplary embodiments thereof, it will be clear to those of ordinary skill in the art to which the invention pertains that various modifications may be made to the described embodiments without departing from the spirit and scope of the invention as defined in the appended claims and their equivalents.

[54]

Claims

[1] A door lock device comprising: a housing installed at a door; a deadbolt installed in the housing and linearly movable in a direction projecting from and inserting into the housing to lock and unlock the door; a first rotary member rotatably coupled to the housing and connected to the deadbolt such that the deadbolt moves linearly in a direction inserting the housing depending on rotation thereof; and a second rotary member rotatably coupled to the housing, relatively rotatable with respect to the first rotary member, and connected to the deadbolt such that the deadbolt moves linearly in a direction projecting from the housing depending on rotation thereof.

[2] The door lock device according to claim 1, wherein the first rotary member has a first insertion groove, a first insertion projection, and a second rotary member has a second insertion groove and a second insertion projection, the first insertion projection is inserted into the second insertion groove, the second insertion projection being inserted into the first insertion groove, the first insertion groove is configured to include a rotational path of the second insertion projection, and the second insertion groove is configured to include a rotational path of the first insertion projection.

[3] The door lock device according to claim 2, further comprising: an inside handle rotatably installed to an inner side of the door; and a handle pin rotatable depending on rotation of the inside handle, disposed between the first insertion projection and the second insertion projection, pressing the first insertion projection to rotate the first rotary member in one direction upon rotation thereof in the one direction, and pressing the second insertion projection to rotate the second rotary member in a direction opposite to the one direction upon rotation thereof in the oppfositfe direction.

[4] The door lock device according to claim 3, wherein the deadbolt has a pressure- receiving projection, the first rotary member has a first push part for pressing the pressure-receiving projection upon rotation of the first rotary member, and the second rotary member has a second push part for pressing the pressure- receiving projection upon rotation of the second rotary member, the pressure- receiving projection being disposed between the first push part and the second push part.

[5] The door lock device according to any one of claims 1 to 3, further comprising: an intermediate member rotatably coupled to the deadbolt to be linearly movable with the deadbolt and having the pressure-receiving projection, wherein the first rotary member has a first push part for pressing the pressure- receiving projection to linearly move the intermediate member upon rotation of the first rotary member, the second rotary member has a second push part for pressing the pressure- receiving projection to linearly move the intermediate member upon rotation of the second rotary member, the pressure-receiving projection being disposed between the first push part and the second push part, at least one of the intermediate member and the first rotary member has a first slope part sloped with respect to the moving direction of the deadbolt such that the intermediate member is pressed and rotated by the first push part upon rotation of the first rotary member, and at least one of the intermediate member and the second rotary member has a second slope part sloped with respect to the moving direction of the deadbolt such that the intermediate member is pressed and rotated by the second push part upon rotation of the second rotary member.

[6] The door lock device according to claim 5, further comprising a resilient member for resiliently biasing the first rotary member and the second rotary member in opposite directions to be spaced apart from each other.

[7] The door lock device according to claim 6, wherein the resilient member is a torsion spring having one end in contact with and supported by the first insertion projection and the other end in contact with and supported by the second insertion projection.

[8] The door lock device according to claim 1, further comprising: an intermediate member rotatably coupled to the deadbolt, linearly movable with the deadbolt and having a pressure-receiving projection; and a main rotary member installed in the housing to be rotated depending on rotation of a motor installed in the housing, and having a first pressing part and a second pressing part disposed to oppose each other with the pressure-receiving projection interposed therebetween to press the pressure-receiving projection in opposite directions upon rotation thereof, wherein the first rotary member and the second rotary member have a first push part and a second push part for pressing the pressure-receiving projection in opposite directions upon rotation of the first rotary member and the second rotary member, respectively, the pressure-receiving projection is disposed between the first push part and the second push part, and the intermediate member is pressed by at least one of the main rotary member, the first rotary member, and the second rotary member, upon rotation of the at least one of the main rotary member, the first rotary member, and the second rotary member, to be rotated to a predetermined angle and then linearly move. [9] The door lock device according to claim 8, wherein at least one of the intermediate member and the first rotary member has a first slope part that is sloped with respect to the moving direction of the deadbolt such that the intermediate member is pressed and rotated by the first push part upon rotation of the first rotary member, and at least one of the intermediate member and the second rotary member has a second slope part that is sloped with respect to the moving direction of the deadbolt such that the intermediate member is pressed and rotated by the second push part upon rotation of the second rotary member.