Locking apparatus for furniture door

Abstract

The locking device for a furniture door according to the present invention comprises: a board formed in the shape of a plate; a driving unit installed on the board; a driving cam that receives power from the driving unit and rotates around a driving shaft; a driving link formed in the shape of a bar, one end of which is connected to the driving cam and moves by the rotation of the driving cam; and a locking unit including a first locking bar connected to the other end of the driving link and rotating around the rotating shaft, and a second locking bar that rotates around the rotating shaft and is equipped with a latch on the other end, wherein the first locking bar and the second locking bar rotate integrally around the rotating shaft, and when the first locking bar rotates around the rotating shaft due to the movement of the driving link, the latch of the second locking bar can rotate.

Description

Technology Field

[0001] The present invention relates to a locking device for a furniture door, and more specifically, to a locking device for a furniture door that can open or lock the furniture door by rotating a driving cam through a driving unit to move a driving link, and rotating a locking part equipped with a latch as the driving link moves. Background Technology

[0002] General furniture may be equipped with a storage space for storing items and a door capable of opening and closing the storage space. The door of the furniture may open and close the storage space by a hinged mechanism that rotates around a hinge, or by a sliding mechanism that slides the door.

[0003] The door of such furniture may be equipped with a locking device capable of opening or locking the door. The door locking device may be equipped with a latch, and the door can be opened or locked by rotating the latch.

[0004] However, conventional locking devices have the following problems. When opening or locking a door by rotating a latch provided in the locking device, the door can be opened or locked by rotating the latch in opposite directions. Specifically, the latch can be rotated clockwise to lock the door, and the latch can be rotated counterclockwise to open the door again.

[0005] However, there is a problem in that the configuration of the drive unit that rotates the latch becomes complex as the latch rotates in opposite directions when opening or locking the door. Specifically, there is a problem in that two motors must be used to rotate the latch in opposite directions when opening or locking the door.

[0006] Although it is possible to rotate the latches using a single motor, this presents a problem in that a separate component is required to rotate the latches in opposite directions using that single motor. The problem to be solved

[0007] The present invention is intended to solve the aforementioned problems, and more specifically, it relates to a locking device for a furniture door that can open or lock the furniture door by rotating a driving cam through a driving unit to move a driving link, and rotating a locking part equipped with a latch as the driving link moves. means of solving the problem

[0008] A locking device for a furniture door according to one embodiment comprises: a board formed in the shape of a plate; a driving unit installed on the board; a driving cam that receives power from the driving unit and rotates around a driving shaft; a driving link formed in the shape of a bar, one end of which is connected to the driving cam and moves by the rotation of the driving cam; and a locking unit including a first locking bar connected to the other end of the driving link and rotating around the rotating shaft, and a second locking bar that rotates around the rotating shaft and has a latch on the other end, wherein the first locking bar and the second locking bar rotate integrally around the rotating shaft, and when the first locking bar rotates around the rotating shaft due to the movement of the driving link, the latch of the second locking bar can rotate.

[0009] In the interior of the drive cam of a furniture door locking device according to one embodiment, a guide groove extending along a designated path is provided, and on one side of the drive link, a guide projection inserted into the guide groove is provided, and when the drive cam rotates around the drive shaft, the drive link can move as the guide projection moves along the guide groove.

[0010] The guide groove of the locking device for a furniture door according to one embodiment may be formed as a closed curve.

[0011] The center of the closed curve formed by the guide groove of the furniture door locking device according to one embodiment may be eccentric from the drive shaft.

[0012] In one embodiment, the length of the second locking bar and the length of the first locking bar of the furniture door locking device may be formed with different lengths.

[0013] The first locking bar and the second locking bar of the furniture door locking device according to one embodiment can be extended in a 'v' shape.

[0014] In one embodiment, a coupling projection is provided on one side of the first locking bar of the furniture door locking device, and a coupling groove is provided on the other side of the driving link, and the coupling groove may be formed as an elongated hole.

[0015] A locking device for a furniture door according to one embodiment may include a position sensing sensor capable of recognizing the rotational position of the drive cam rotating around the drive shaft.

[0016] The position detection sensor of the furniture door locking device according to one embodiment may include an open position detection sensor and a lock position detection sensor.

[0017] A locking device for a furniture door according to one embodiment is connected to the driving cam through the driving shaft and includes a rotating plate that rotates integrally with the driving cam around the driving shaft, and the rotating plate may be provided with one or more position recognition holes.

[0018] The position sensing sensor of the furniture door locking device according to one embodiment is composed of a Hall sensor capable of recognizing the position recognition hole, and the position sensing sensor can recognize the rotational position of the drive cam rotating around the drive shaft through the position recognition hole.

[0019] According to one embodiment, a gear is provided on the outer side of the drive cam of a furniture door locking device, a drive gear is provided in the drive part, and an auxiliary gear connecting the drive gear and the gear of the drive cam may be included.

[0020] The driving link of the furniture door locking device according to one embodiment includes a first driving link connected to the driving cam and a second driving link connected to the driving cam, and the locking part may be connected to each of the first driving link and the second driving link.

[0021] In the interior of the drive cam of a furniture door locking device according to one embodiment, a guide groove extending along a designated path is provided, and on one side of the first drive link, a guide projection inserted into the guide groove is provided, and on one side of the second drive link, a connecting groove into which the guide projection is inserted is provided, and the guide projection is inserted into the guide groove after being inserted into the connecting groove, and when the drive cam rotates around the drive shaft, the guide projection moves along the guide groove, and the first drive link and the second drive link can be moved. Effects of the invention

[0022] The present invention provides a guide groove formed by a closed curve inside a drive cam, and allows a furniture door to be opened or locked by moving a guide projection of a drive link along the guide groove formed by the closed curve. Through this, the present invention has the advantage of being able to open or lock a furniture door even if the drive cam is rotated in only one direction by the drive unit.

[0023] In addition, the present invention has the advantage of simplifying the configuration of the drive unit by forming the drive cam to open or lock the furniture door even when rotated in only one direction.

[0024] In addition, the present invention has the advantage of being able to detect the open state and the locked state of the door through a rotating plate equipped with a position recognition hole and a position detection sensor that recognizes the position recognition hole.

[0025] In addition, the present invention has the advantage of being able to position the latch in various positions in a locking device by rotating the latch through a driving link and a first locking part and a second locking part having different radii. Brief explanation of the drawing

[0026] FIG. 1 is a drawing showing a door frame equipped with a locking device according to an embodiment of the present invention. FIG. 2 is a drawing showing the open state and the locked state of a locking device according to an embodiment of the present invention. FIG. 3 is a drawing showing the state in which the second board is removed from a locking device according to an embodiment of the present invention. FIG. 4 is a drawing showing a first board and a second board according to an embodiment of the present invention. FIG. 5 is a drawing showing a driving cam and a driving link according to an embodiment of the present invention. FIG. 6 is a drawing showing a driving link and a locking part according to an embodiment of the present invention. FIG. 7 is a drawing showing a driving unit equipped with a driving gear, an auxiliary gear, and a driving cam equipped with teeth on the outside, according to an embodiment of the present invention. FIG. 8 is a drawing showing a driving cam, a rotating plate, and a position sensing sensor according to an embodiment of the present invention. FIG. 9 is a drawing showing a driving cam and a rotating plate according to an embodiment of the present invention. FIG. 10 is a drawing showing a rotating plate and a position detection sensor according to an embodiment of the present invention. FIG. 11 is a drawing showing a first drive link and a second drive link connected to a drive cam according to an embodiment of the present invention. FIG. 12 is a drawing showing a driving cam, a first driving link, and a second driving link according to an embodiment of the present invention. Specific details for implementing the invention

[0027] This specification clarifies the scope of the present invention and explains the principles of the present invention and discloses embodiments so that those skilled in the art can practice the present invention. The disclosed embodiments may be implemented in various forms.

[0028] Expressions such as "comprising" or "may comprise" that may be used in various embodiments of the present invention indicate the existence of the disclosed corresponding function, operation, or component, and do not limit one or more additional functions, operations, or components. Furthermore, in various embodiments of the present invention, terms such as "comprising" or "having" are intended to specify the existence of the features, numbers, steps, operations, components, parts, or combinations thereof described in the specification, and should be understood as not precluding the existence or addition of one or more other features, numbers, steps, operations, components, parts, or combinations thereof.

[0029] When it is stated that a component is "connected or coupled" to another component, it should be understood that the component may be directly connected or coupled to the other component, but that a new component may also exist between the component and the other component. On the other hand, when it is stated that a component is "directly connected" or "directly coupled" to another component, it should be understood that no new component exists between the component and the other component.

[0030] The terms "first," "second," etc., as used in this specification may be used to describe various components, but the components should not be limited by these terms. The terms are used solely for the purpose of distinguishing one component from another.

[0031] The present invention relates to a locking device for a furniture door, wherein a driving cam is rotated through a driving unit to move a driving link, and as the driving link moves, a locking part equipped with a latch rotates to open or lock the furniture door. Hereinafter, a preferred embodiment of the present invention will be described in detail with reference to the attached drawings.

[0032] Referring to FIG. 1, a locking device (100) for a furniture door according to an embodiment of the present invention may be installed on the door. Specifically, the locking device (100) may be installed on a door frame (10) and may be installed on the door frame (10) through a connecting plate (11). However, it is not limited thereto, and the locking device (100) may be installed at various points on the door.

[0033] A locking device (100) for a furniture door according to an embodiment of the present invention can open or lock the door by rotating a latch (171). Referring to FIG. 2, when the latch (171) protrudes outward from the locking device (100), the door can be locked. Additionally, when the latch (171) is retracted inward from the locking device (100), the door can be opened.

[0034] Referring to FIG. 3, a locking device (100) for a furniture door according to an embodiment of the present invention includes a board (110), a driving unit (120), a driving cam (130), a driving link (140), and a locking unit (150).

[0035] The above board (110) is formed in the shape of a plate. The above board (110) may be a housing in which parts of a locking device (100) for a furniture door according to an embodiment of the present invention can be installed.

[0036] Referring to FIG. 4, the board (110) according to an embodiment of the present invention may include a first board (111) and a second board (112). The first board (111) and the second board (112) may be joined facing each other, and various components may be installed inside the first board (111) and the second board (112).

[0037] Referring to FIG. 3, the driving unit (120) may be installed on the board (110). The driving unit (120) provides power capable of rotating the driving cam (130), and the driving unit (120) may be made of a motor. However, it is not limited thereto, and the driving unit (120) may be made of various configurations as long as it can provide power capable of rotating the driving cam (130).

[0038] The above drive cam (130) can receive power from the drive unit (120) and rotate around the drive shaft (131). Referring to FIGS. 3 and FIGS. 5, the drive cam (130) is formed in the shape of a disc, and the drive shaft (131) can be formed at the center of the drive cam (130).

[0039] According to an embodiment of the present invention, the drive shaft (131) can be coupled to the board (110). When power is transmitted from the drive unit (120) to the drive cam (130), the drive cam (130) rotates around the drive shaft (131).

[0040] Referring to FIGS. 3 and FIGS. 5, the drive link (140) is formed in a bar shape and one side is connected to the drive cam (130). The drive link (140) is formed in a bar shape that extends in the longitudinal direction and is connected to the drive cam (130), and the drive link (140) can be moved by the rotation of the drive cam (130).

[0041] Referring to FIGS. 3 and FIGS. 6, the locking part (150) includes a rotation axis (151), a first locking bar (160), and a second locking bar (170). The rotation axis (151) can be fixed to the board (110), and the locking part (150) can rotate around the rotation axis (151).

[0042] The first locking bar (160) is connected to the other side of the drive link (140) and can rotate around the rotation axis (151). The first locking bar (160) is formed in a bar shape, and one side of the first locking bar (160) can be connected to the other side of the drive link (140). Additionally, the rotation axis (151) can be connected to the other side of the first locking bar (160), and the first locking bar (160) can rotate around the rotation axis (151).

[0043] The second locking bar (170) rotates around the rotation axis (151) and is equipped with a latch (171) on the other side. The second locking bar (170) is formed in a bar shape, and the latch (171) may be provided on the other side of the second locking bar (170).

[0044] The above latch (171) may be formed in a hook shape, and the above latch (171) may be formed in a shape that is bent at the other side of the second locking bar (170). The rotation axis (151) may be connected to one side of the second locking bar (170), and the second locking bar (170) may rotate around the rotation axis (151).

[0045] According to an embodiment of the present invention, the first locking bar (160) and the second locking bar (170) may be formed integrally. The first locking bar (160) and the second locking bar (170) are formed integrally and rotate together, and the rotation axis (151) may be provided between the first locking bar (160) and the second locking bar (170). The first locking bar (160) and the second locking bar (170) rotate integrally around the rotation axis (151).

[0046] When the first locking bar (160) rotates around the rotation axis (151) due to the movement of the driving link (140) according to an embodiment of the present invention, the latch (171) of the second locking bar (170) rotates.

[0047] Specifically, when the drive cam (130) is rotated by the drive unit (120), the drive link (140) moves due to the rotation of the drive cam (130). When the drive link (140) moves, the first locking bar (160) rotates around the rotation axis (151).

[0048] Since the second lock bar (170) rotates integrally with the first lock bar (160) and the rotation axis (151), when the first lock bar (160) rotates, the second lock bar (170) also rotates. When the second lock bar (170) rotates, the latch (171) provided on the second lock bar (170) rotates, and the door can be opened or locked.

[0049] Referring to FIG. 5, the interior of the driving cam (130) according to an embodiment of the present invention is provided with a guide groove (132) that extends along a designated path, and one side of the driving link (140) may be provided with a guide projection (141) that is inserted into the guide groove (132).

[0050] When the drive cam (130) rotates around the drive shaft (131), the drive link (140) can be moved as the guide projection (141) moves along the guide groove (132).

[0051] According to an embodiment of the present invention, the driving link (140) may include a fixed shaft (143). The fixed shaft (143) may be provided in the middle portion of the driving link (140), and the fixed shaft (143) may be fixed to the board (110).

[0052] Specifically, the fixed shaft (143) provided in the drive link (140) can be fixed to the second board (112), and the drive shaft (131) provided in the drive cam (130) can be fixed to the first board (111).

[0053] According to an embodiment of the present invention, when the drive cam (130) rotates around the drive shaft (131), the drive link (140) moves as the guide projection (141) moves along the guide groove (132). At this time, as the fixed shaft (143) of the drive link (140) is fixed to the second board (112), the drive link (140) can move while rotating in the left and right directions around the fixed shaft (143).

[0054] According to an embodiment of the present invention, the length of the second locking bar (170) and the length of the first locking bar (160) may be formed differently from each other. Specifically, the length of the second locking bar (170) may be formed to be longer than the length of the first locking bar (160). In addition, according to an embodiment of the present invention, the first locking bar (160) and the second locking bar (170) may be extended in a 'v' shape.

[0055] In this way, the length of the second locking bar (170) and the length of the first locking bar (160) are formed differently from each other, and by extending the first locking bar (160) and the second locking bar (170) into a 'v' shape, the latch (171) can be placed in various positions.

[0056] Specifically, the lengths of the first locking bar (160) and the second locking bar (170) can be adjusted according to the position where the latch (171) is placed in the locking device (100). Additionally, the latch (171) can be placed in various positions in the locking device (100) by adjusting the bending angle of the first locking bar (160) and the second locking bar (170), which extend in a 'V' shape.

[0057] In addition, the rotation radius of the latch (171) can be adjusted by forming the length of the second locking bar (170) and the length of the first locking bar (160) differently. Specifically, by forming the length of the second locking bar (170) longer than the length of the first locking bar (160), the rotation radius of the second locking bar (170) and the latch (171) can be formed larger relative to the rotation radius of the first locking bar (160).

[0058] Referring to FIG. 6, a coupling projection (161) is provided on one side of the first locking bar (160), and a coupling groove (142) may be provided on the driving link (140). The first locking bar (160) and the driving link (140) can be connected through the coupling projection (161) and the coupling groove (142).

[0059] When the driving cam (130) is rotated by the driving unit (120) according to an embodiment of the present invention, the guide projection (141) moves along the guide groove (132). When the guide projection (141) moves along the guide groove (132), the driving link (140) moves. At this time, the driving link (140) rotates in the left and right directions around the fixed axis (143).

[0060] When the drive link (140) moves, the first lock bar (160) rotates around the rotation axis (151). Since the second lock bar (170) rotates integrally with the first lock bar (160) around the rotation axis (151), when the first lock bar (160) rotates, the second lock bar (170) also rotates. When the second lock bar (170) rotates, the latch (171) provided on the second lock bar (170) rotates, and the door can be opened or locked.

[0061] According to an embodiment of the present invention, the guide groove (132) may be formed as a closed curve. Additionally, the center of the closed curve formed by the guide groove (132) may be eccentric from the drive shaft (131).

[0062] As the above guide groove (132) is formed as a closed curve, the door can be changed to an open or locked state even if the drive cam (130) is rotated in only one direction by the drive unit (120).

[0063] Specifically, when changing the door from an open state to a locked state, the guide projection (141) can move from the position of the guide groove (132) corresponding to the open state of the door to the position of the guide groove (132) corresponding to the locked state of the door.

[0064] At this time, as the guide groove (132) is formed as a closed curve, even if the drive cam (130) is rotated in only one direction by the drive unit (120), the guide projection (141) can return to the position of the guide groove (132) corresponding to the open state of the door.

[0065] That is, the locking device (100) of a furniture door according to an embodiment of the present invention can change the door's open state-locked state-open state-locked state by rotating the driving cam (130) in only one direction with the driving unit (120) as the guide groove (132) is formed as a closed curve. Through this, the locking device (100) of a furniture door according to an embodiment of the present invention can simplify the configuration of the driving unit (120).

[0066] However, it is not limited to this, and as needed, the drive unit (120) may change the open and locked states of the door by rotating the drive cam (130) in one direction or the other.

[0067] Specifically, the driving unit (120) can change the door's open state to a locked state by rotating the driving cam (130) in a clockwise direction (or counterclockwise direction), and the driving unit (120) can change the door's locked state to an open state by rotating the driving cam (130) in a counterclockwise direction (or clockwise direction).

[0068] The coupling groove (142) provided in the driving link (140) according to an embodiment of the present invention may be formed as an elongated hole. Specifically, the coupling groove (142) may be formed as an elongated hole extending in the longitudinal direction while having the same width as the coupling projection (161).

[0069] When the guide groove (132) is formed as a closed curve and the guide projection (141) moves in one direction along the guide groove (132), interference may occur between the drive link (140) and the first locking bar (160) as the rotation radius of the drive link (140) and the rotation radius of the first locking bar (160) are different from each other.

[0070] Specifically, as the rotation radius of the drive link (140) and the rotation radius of the first locking bar (160) are different from each other, the drive link (140) may be caught on the first locking bar (160).

[0071] To prevent this, the coupling groove (142) connecting the drive link (140) and the first locking bar (160) may be formed as an elongated hole. Since the coupling groove (142) is formed as an elongated hole, interference between the drive link (140) and the first locking bar (160) can be prevented.

[0072] Referring to FIG. 7, a gear (133) is provided on the outer side of the driving cam (130) according to an embodiment of the present invention, and a driving gear (121) may be provided in the driving unit (120). In addition, the locking device of a furniture door according to an embodiment of the present invention may include an auxiliary gear (134) connecting the driving gear (121) and the gear (133) of the driving cam (130).

[0073] Referring to FIG. 7, the driving gear (121) can be engaged with the auxiliary gear (134), and the auxiliary gear (134) can be engaged with the gear tooth (133) of the driving cam (130).

[0074] The power of the above drive unit (120) can be transmitted to the drive gear (121), and the power transmitted to the drive gear (121) can be transmitted to the auxiliary gear (134). The power transmitted to the auxiliary gear (134) can be transmitted to the gear (133), thereby causing the drive cam (130) to rotate around the drive shaft (131).

[0075] Referring to FIGS. 3 and FIGS. 8, a locking device for a furniture door according to an embodiment of the present invention may include a position sensing sensor (180) capable of recognizing the rotational position of the driving cam (130) rotating around the driving shaft (131).

[0076] The position sensing sensor (180) can recognize the rotational position of the drive cam (130), thereby recognizing the position where the guide projection (141) moves along the guide groove (132).

[0077] By recognizing the position where the guide projection (141) moves along the guide groove (132) through the position detection sensor (180), it is possible to detect whether the door is in an open or locked state.

[0078] According to an embodiment of the present invention, the position sensing sensor (180) may include an open position sensing sensor (181) and a lock position sensing sensor (182). The open position sensing sensor (181) can recognize the position of the guide projection (141) corresponding to the open state of the door through the rotational position of the drive cam (130).

[0079] According to an embodiment of the present invention, when the door is changed from a locked state to an open state by rotating the drive cam (130), the open state position of the door can be recognized through the open position detection sensor (181). When the open state position of the door is recognized through the open position detection sensor (181), the rotation of the drive cam (130) stops, and the door can be maintained in an open state.

[0080] The above lock position detection sensor (182) can recognize the position of the guide projection (141) corresponding to the locked state of the door through the rotational position of the drive cam (130).

[0081] According to an embodiment of the present invention, when the door is changed from an open state to a locked state by rotating the drive cam (130), the locked state position of the door can be recognized through the lock position detection sensor (182). When the locked state position of the door is recognized through the lock position detection sensor (182), the rotation of the drive cam (130) stops, and the door can be maintained in a locked state.

[0082] Referring to FIGS. 8 and 9, a locking device (100) for a furniture door according to an embodiment of the present invention may include a rotating plate (190) that is connected to the driving cam (130) through the driving shaft (131) and rotates integrally with the driving cam (130) around the driving shaft (131).

[0083] Since the above-mentioned rotating plate (190) rotates integrally with the above-mentioned driving cam (130), the rotational position of the above-mentioned rotating plate (190) can be recognized, thereby enabling the recognition of the rotational position of the above-mentioned driving cam (130).

[0084] According to an embodiment of the present invention, the position sensing sensor (180) can recognize the rotational position of the rotating plate (190) and the rotational position of the driving cam (130). Referring to FIG. 10, the rotating plate (190) may be provided with one or more position recognition holes (191). The position recognition holes (191) may be holes that penetrate the rotating plate (190).

[0085] According to an embodiment of the present invention, the position sensing sensor (180) may be composed of a Hall sensor capable of recognizing the position recognition hole (191). Referring to FIG. 10, when the position recognition hole (191) of the rotating plate (190) passes through the position sensing sensor (180), the position sensing sensor (180), which is composed of a Hall sensor, becomes capable of recognizing it.

[0086] Through this, the position sensing sensor (180) can recognize the rotational position of the rotating plate (190). Since the rotating plate (190) rotates integrally with the driving cam (130), recognizing the rotational position of the rotating plate (190) allows the rotational position of the driving cam (130) to be recognized. Therefore, the position sensing sensor (180) can recognize the rotational position of the driving cam (130) rotating around the driving shaft (131) through the position recognition hole (191).

[0087] According to an embodiment of the present invention, the rotating plate (190) may be provided with one or more position recognition holes (191). When the position recognition hole (191) of the rotating plate (190) passes through the open position detection sensor (181), the open state of the door can be recognized. Additionally, when the position recognition hole (191) of the rotating plate (190) passes through the lock position detection sensor (182), the locked state of the door can be recognized.

[0088] According to an embodiment of the present invention, when the driving cam (130) is rotated to change the door from a locked state to an open state, if the position recognition hole (191) passes through the open position detection sensor (181), the rotation of the driving cam (130) stops, and the door can be maintained in an open state.

[0089] In addition, according to an embodiment of the present invention, when the driving cam (130) is rotated to change the door from an open state to a locked state, if the position recognition hole (191) passes through the lock position detection sensor (182), the rotation of the driving cam (130) stops, and the door can be maintained in a locked state.

[0090] However, it is not limited thereto, and the rotating plate (190) according to an embodiment of the present invention may be provided with two position recognition holes (191). The two position recognition holes (191) may each be positioned at locations corresponding to the open state of the door and the locked state of the door. The position detection sensor (180) may recognize the open state of the door and the locked state of the door through the two position recognition holes (191).

[0091] Referring to FIG. 11, the driving link (140) according to an embodiment of the present invention may include a first driving link (140a) connected to the driving cam (130) and a second driving link (140b) connected to the driving cam (130). The locking part (150) may be connected to each of the first driving link (140a) and the second driving link (140b).

[0092] A furniture door locking device according to an embodiment of the present invention can maintain the door in an open and locked state through two of the latches (171). Additionally, a furniture door locking device according to an embodiment of the present invention can maintain two doors in an open and locked state through two of the latches (171).

[0093] To this end, the locking device of a furniture door according to an embodiment of the present invention may include the first driving link (140a) and the second driving link (140b) to which the locking part (150) is connected.

[0094] The first drive link (140a) and the second drive link (140b) may have the same configuration as the drive link (140), and all the features of the drive link (140) may be applied. Specifically, the first drive link (140a) may be provided with a coupling groove (142a) for connecting the first locking bar (160), and the first drive link (140a) may be fixed to the second board (112) through a fixed shaft (143a).

[0095] Additionally, the second drive link (140b) may be provided with a coupling groove (142b) for connecting the first locking bar (160), and the second drive link (140b) may be fixed to the second board (112) through a fixed shaft (143b).

[0096] Additionally, the first drive link (140a) and the second drive link (140b) can be connected to one of the drive cams (130), and the first drive link (140a) and the second drive link (140b) can be moved through one of the drive cams (130).

[0097] Referring to FIG. 12, the drive cam (130) may be provided with a guide groove (132) that extends along a designated path. In order to move the first drive link (140a) and the second drive link (140b) through one of the drive cams (130), a guide projection (141a) that is inserted into the guide groove (132) may be provided on one side of the first drive link (140a).

[0098] According to an embodiment of the present invention, the first driving link (140a) and the second driving link (140b) can be connected to each other and move. To this end, the second driving link (140b) may be provided with a connecting groove (141b) instead of a guide projection. Specifically, a connecting groove (141b) into which the guide projection (141a) is inserted may be provided on one side of the second driving link (140b).

[0099] Referring to FIG. 12, the guide projection (141a) can be inserted into the guide groove (132) after being inserted into the connecting groove (141b). As the guide projection (141a) is inserted into the guide groove (132) after being inserted into the connecting groove (141b), the first driving link (140a) and the second driving link (140b) can move together.

[0100] When the drive cam (130) is rotated around the drive shaft (131) according to an embodiment of the present invention, the guide projection (141a) moves along the guide groove (132), and the first drive link (140a) and the second drive link (140b) can move together.

[0101] Since the guide projection (141a) is provided on the first drive link (140a), when the guide projection (141a) moves along the guide groove (132), the first drive link (140a) moves. Additionally, since the second drive link (140b) is connected to the guide projection (141a) through the connecting groove (141b), when the guide projection (141a) moves along the guide groove (132), the second drive link (140b) also moves together.

[0102] The method of rotating the latch (171) of the two locking parts (150) according to the movement of the first driving link (140a) and the second driving link (140b) may be the same as the method of rotating the latch (171) of the locking part (150) through the driving link (140) described above.

[0103] As such, the locking device for a furniture door according to an embodiment of the present invention can maintain the door in an open and locked state through two driving links and two latches. Additionally, if necessary, the locking device for a furniture door according to an embodiment of the present invention can maintain two or more doors in an open and locked state through two or more driving links and two or more latches.

[0104] The locking device for a furniture door according to the embodiment of the present invention described above has the following effects.

[0105] A furniture door locking device according to an embodiment of the present invention is provided with a guide groove formed by a closed curve inside a driving cam, and can open or lock the furniture door by moving a guide projection of a driving link along the guide groove formed by a closed curve. Through this, the furniture door locking device according to an embodiment of the present invention has the advantage of being able to open or lock the furniture door even if the driving cam is rotated in only one direction by the driving unit.

[0106] In addition, the locking device for a furniture door according to an embodiment of the present invention has the advantage of simplifying the configuration of the driving unit by forming the furniture door to open or lock even when the driving cam is rotated in only one direction.

[0107] In addition, the locking device for a furniture door according to an embodiment of the present invention has the advantage of being able to detect the open state and the locked state of the door through a rotating plate equipped with a position recognition hole and a position sensing sensor that recognizes the position recognition hole.

[0108] In addition, the locking device for a furniture door according to an embodiment of the present invention has the advantage of being able to position the latch in various positions within the locking device by rotating the latch through a driving link, and has a first locking part and a second locking part having different radii.

[0109] As such, the present invention has been described with reference to an embodiment illustrated in the drawings; however, this is merely illustrative, and those skilled in the art will understand that various modifications and variations of the embodiments are possible therefrom. Accordingly, the true scope of technical protection of the present invention should be determined by the technical spirit of the appended claims. Explanation of the symbols

[0110] 10...Door frame 11...Connecting plate 100...lock 110...board 111...1st board 112...2nd board 120...Drive unit 121...Drive gear 130...Drive cam 131...Drive shaft 132...Guide Home 133...Gieotni 134...Auxiliary gear 140...Drive link 141...Guide projection 142...Coupling groove 143...Fixed shaft 140a...First driving link 141a...Guide projection 142a...Coupling groove 143a...Fixed shaft 140b...Second drive link 141b...connecting groove 142b...joining groove 143b...Fixed shaft 150...Locking part 151...Rotation axis 160...First locking bar 161...Connecting projection 170...Second locking bar 171...Latch 180...Position detection sensor 181...Open position detection sensor 182...Lock position detection sensor 190...Rotating plate 191...Position recognition hole

Claims

Claim 1 A locking device for a furniture door comprises: a board formed in the shape of a plate, installed on the door frame of the door; a driving unit installed on the board; a driving cam that receives power from the driving unit and rotates around a driving shaft coupled to the board; and a driving link formed in the shape of a bar, one end of which is connected to the driving cam, and which moves by the rotation of the driving cam. A locking part comprising: a rotating shaft fixed to the board; a first locking bar formed in a bar shape, with one end connected to the other end of the driving link and the other end connected to the rotating shaft and rotating around the rotating shaft; and a second locking bar formed in a bar shape, with one end connected to the rotating shaft and rotating around the rotating shaft, and a latch provided on the other end; wherein the first locking bar and the second locking bar are integrally formed, the rotating shaft is provided between the first locking bar and the second locking bar, and the first locking bar and the second locking bar rotate around the rotating shaft; when the first locking bar rotates around the rotating shaft due to the movement of the driving link, the latch of the second locking bar rotates, and a guide groove extending along a designated path is provided inside the driving cam, and a guide projection inserted into the guide groove is provided on one side of the driving link, and when the driving cam rotates around the driving shaft, the guide projection... A locking device for a furniture door characterized by the above-mentioned driving link moving as it moves along. Claim 2 delete Claim 3 A locking device for a furniture door according to paragraph 2, characterized in that the guide groove is formed as a closed curve. Claim 4 A locking device for a furniture door according to paragraph 3, characterized in that the center of the closed curve formed by the guide groove is eccentric from the drive shaft. Claim 5 A locking device for a furniture door according to claim 1, characterized in that the length of the second locking bar and the length of the first locking bar are formed to be different lengths. Claim 6 A locking device for a furniture door according to claim 1, wherein the first locking bar and the second locking bar are extended in a 'v' shape. Claim 7 A locking device for a furniture door according to claim 1, wherein one side of the first locking bar is provided with a coupling projection, and the other side of the driving link is provided with a coupling groove, and the coupling groove is formed as an elongated hole. Claim 8 A locking device for a furniture door according to claim 1, characterized by including a position sensing sensor capable of recognizing the rotational position of the drive cam rotating around the drive shaft. Claim 9 A locking device for a furniture door according to claim 8, characterized in that the position sensing sensor includes an open position sensing sensor and a lock position sensing sensor. Claim 10 A locking device for a furniture door according to claim 8, comprising a rotating plate connected to the driving cam through the driving shaft and rotating integrally with the driving cam around the driving shaft, wherein the rotating plate is provided with one or more position recognition holes. Claim 11 A locking device for a furniture door according to claim 10, wherein the position sensing sensor is composed of a Hall sensor capable of recognizing the position recognition hole, and the position sensing sensor recognizes the rotational position of the drive cam rotating around the drive shaft through the position recognition hole. Claim 12 A locking device for a furniture door according to claim 1, characterized in that a gear is provided on the outer side of the driving cam, a driving gear is provided on the driving part, and an auxiliary gear is included to connect the driving gear and the gear of the driving cam. Claim 13 A locking device for a furniture door according to claim 1, wherein the driving link comprises a first driving link connected to the driving cam and a second driving link connected to the driving cam, and wherein the locking part is connected to each of the first driving link and the second driving link. Claim 14 A locking device for a furniture door according to claim 13, wherein the interior of the drive cam is provided with a guide groove extending along a designated path, one side of the first drive link is provided with a guide projection inserted into the guide groove, and one side of the second drive link is provided with a connecting groove into which the guide projection is inserted, and the guide projection is inserted into the guide groove after being inserted into the connecting groove, and when the drive cam rotates around the drive shaft, the guide projection moves along the guide groove, thereby moving the first drive link and the second drive link.

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