Door latch for vehicle without outside door handle

Abstract

The present disclosure relates to a door latch for vehicle without outside door handle combining a front door latch, that can manually open a front door allowing the pulling of a front open block at all times, with a rear door latch strengthening a safety structure that prevents a rear door from manually opening by blocking the pulling of a rear open block when a rear safety block is in a locked position by improving technology that may cause safety problems such as malfunctions in accordance with the trend toward electrical components of the vehicle.

Description

DOOR LATCH FOR VEHICLE WITHOUT OUTSIDE DOOR HANDLE

[0001] The present disclosure relates to a door latch for vehicle without outside door handle combining a front door latch, that can manually open a front door allowing the pulling of a front open block at all times, with a rear door latch strengthening a safety structure that prevents a rear door from manually opening by blocking the pulling of a rear open block when a rear safety block is in a locked position by improving technology that may cause safety problems such as malfunctions in accordance with the trend toward electrical components of the vehicle.

[0002] A door latch is provided inside a vehicle door to perform lock and unlock operations of the door and open and close operations of the door.

[0003] A door latch for mechanical vehicle is provided outside the vehicle door. When a user inserts a vehicle key into a key cylinder mechanically connected to the vehicle door latch and rotates the key, the lock and unlock operations of the door latch can be performed.

[0004] In an unlocked state of the door latch for mechanical vehicle, the user can open the vehicle door by operating an outside door handle or an inner door handle provided on the vehicle door.

[0005] In contrast, a door latch for electric vehicle can perform the lock and unlock operations of the vehicle door latch by operating a door button inside the vehicle or controlling a vehicle system without using various mechanical devices required for the door latch for mechanical vehicle.

[0006] In addition, in an unlocked state of the door latch for electric vehicle, the user can open the vehicle door by pressing an electronic button provided outside or inside the vehicle.

[0007] A conventional door latch for mechanical vehicle is disclosed in Korean Patent No. 10-2363862. In a vehicle door latch with a safety device disclosed in Korean Patent No. 10-2363862, a safety plate is always connected only to an emergency cable, and thus an open plate can be pulled by an inner door handle even in a locked state. If the door latch, in which the open plate is always pulled, is applied to a rear seat door, the door may be opened due to the carelessness of a child or elderly person.

[0008] [Prior Art Document]

[0009] [Patent Document]

[0010] (Patent Document 1) Korean Patent No. 10-2363862

[0011] An object of the present disclosure is to address the above-described and other problems.

[0012] Another object of the present disclosure is to provide a door latch for vehicle without outside door handle combining a front door latch, in which an open block is always pulled, with a rear door latch strengthening a safety structure that blocks the pulling of an open block in a locked position of a safety block by improving technology that may cause safety problems such as malfunctions in accordance with the trend toward electrical components of the vehicle.

[0013] Another object of the present disclosure is to provide a door latch for vehicle without outside door handle capable of improving assembly ability by temporarily assembling and modularizing respective components to a main cover and an insert cover.

[0014] In order to achieve the above-described and other objects, in one aspect of the present disclosure, there may be provided a door latch for vehicle without outside door handle comprising a front door latch installed on a front door and a rear door latch installed on a rear door, wherein the rear door latch includes a rear latch part including a rear ratchet and a rear pawl; a rear safety block; a rear safety actuator configured to slide the rear safety block; a rear open block that is pulled by a rear inside door lever connector connected to a rear inside door lever of the rear door; a rear open lever configured to pivot the rear pawl by a pulling of the rear open block and open a closing of the rear ratchet; and a rear open block pull blocking part configured to block the pulling of the rear open block based on a position of the rear safety block, wherein the front door latch includes a front latch part including a front ratchet and a front pawl; a front safety block; a front safety actuator configured to slide the front safety block; a front open block that is always pulled by a front inside door lever connector connected to a front inside door lever of the front door; and a front open lever configured to pivot the front pawl by a pulling of the front open block and open a closing of the front ratchet.

[0015] Effects of a door latch for vehicle according to the present disclosure are described as follows.

[0016] According to at least one embodiment of the present disclosure, except in special cases of emergency, a rear open block is not pulled when a rear safety block is in a locked state, thereby preventing a door from opening.

[0017] According to at least one embodiment of the present disclosure, assembly through modularization can be simple and a space can be easily secured by temporarily assembling respective components to an insert cover and mounting them on a main cover and a rear cover.

[0018] Additional scope of applicability of the present disclosure will become apparent from the detailed description given blow. However, it should be understood that the detailed description and specific examples such as embodiments of the present disclosure are given merely by way of example, since various changes and modifications within the spirit and scope of the present disclosure will become apparent to those skilled in the art from the detailed description.

[0019] FIG. 1 is a side view of a vehicle on which a door latch for vehicle without outside door handle according to a preferable embodiment of the present disclosure is mounted.

[0020] FIG. 2a is a plan view schematically illustrating configuration of various door open operating units connected to the door latch for vehicle without outside door handle of FIG. 1.

[0021] FIG. 2b is a block diagram schematically illustrating an operation mechanism of a front door latch part and a rear door latch part.

[0022] FIGS. 3 and 4 are front and rear perspective views illustrating a rear door latch without outside door handle.

[0023] FIGS. 5 and 6 are front and rear perspective views illustrating that the rear door latch of FIG. 3 is separated from a rear main cover, a rear insert cover, and a rear back cover.

[0024] FIG. 7 is a front view illustrating that a front plate is removed from the rear main cover of FIG. 3.

[0025] FIGS. 8 and 9 are front and rear perspective views separately illustrating a rear insert cover, a rear safety actuator, and a rear open actuator.

[0026] FIGS. 10 and 11 are left and right perspective views separately illustrating a rear safety block and a rear open block.

[0027] FIG. 12 is a plan view illustrating that a safety motor and an open motor are installed in a rear insert cover.

[0028] FIGS. 13 and 14 are plan views illustrating that a rear safety block and a rear open block are installed in a rear insert cover.

[0029] FIG. 15 is a plan view illustrating a rear safety actuator and a rear open actuator and a rear perspective view of a disk.

[0030] FIGS. 16 to 18 illustrate a lock of a rear safety block and a close of a rear door.

[0031] FIGS. 19 and 20 illustrate a unlock of a rear safety block and a close of a rear door.

[0032] FIGS. 21 and 22 illustrate an open state of a rear door due to an operation of a rear open actuator in a state of FIGS. 19 and 20.

[0033] FIGS. 23 and 24 illustrate that a rear pole returns in a state of FIGS. 21 and 22.

[0034] FIGS. 25 and 26 illustrate an open state of a rear door due to the pulling of a rear inside door lever connector in a state of FIGS. 19 and 20.

[0035] FIG. 27a is a plan view schematically illustrating various door open operating units of FIG. 2a to which a lock / unlock knob is added.

[0036] FIG. 27b is a block diagram schematically illustrating an operation mechanism in which an inside door knob connector is added to a rear latch part of FIG. 2b.

[0037] FIG. 28 is a perspective view illustrating a door latch for vehicle without inside door handle in which an inside door knob connector is added to a rear safety block of FIG. 3.

[0038] FIG. 29 is a left side view illustrating that a rear back cover is removed from FIG. 28.

[0039] FIG. 30 is a perspective view illustrating a front door latch without outside door handle.

[0040] FIGS. 31 and 32 are left and right perspective views illustrating that a housing and an insert cover are removed from FIG. 30.

[0041] Reference will now be made in detail to embodiments of the disclosure, examples of which are illustrated in the accompanying drawings. Wherever possible, the same reference numbers will be used throughout the drawings to refer to the same or like parts. In general, a suffix such as "module" and "unit" may be used to refer to elements or components. Use of such a suffix herein is merely intended to facilitate description of the present disclosure, and the suffix itself is not intended to give any special meaning or function. It will be noted that a detailed description of known arts will be omitted if it is determined that the detailed description of the known arts can obscure the embodiments of the disclosure. The accompanying drawings are used to help easily understand various technical features and it should be understood that embodiments presented herein are not limited by the accompanying drawings. As such, the present disclosure should be construed to extend to any alterations, equivalents and substitutes in addition to those which are particularly set out in the accompanying drawings.

[0042] The terms including an ordinal number such as first, second, etc. may be used to describe various components, but the components are not limited by such terms. The terms are used only for the purpose of distinguishing one component from other components.

[0043] When any component is described as "being connected" or "being coupled" to other component, this should be understood to mean that another component may exist between them, although any component may be directly connected or coupled to the other component. In contrast, when any component is described as "being directly connected" or "being directly coupled" to other component, this should be understood to mean that no component exists between them.

[0044] A singular expression can include a plural expression as long as it does not have an apparently different meaning in context.

[0045] In the present disclosure, terms "include" and "have" should be understood to be intended to designate that illustrated features, numbers, steps, operations, components, parts or combinations thereof are present and not to preclude the existence of one or more different features, numbers, steps, operations, components, parts or combinations thereof, or the possibility of the addition thereof.

[0046] In the drawings, sizes of the components may be exaggerated or reduced for convenience of explanation. For example, the size and the thickness of each component illustrated in the drawings are arbitrarily illustrated for convenience of explanation, and thus the present disclosure is not limited thereto unless specified as such.

[0047] If any embodiment is implementable differently, a specific order of processes may be performed differently from the order described. For example, two consecutively described processes may be performed substantially at the same time, or performed in the order opposite to the described order.

[0048] In the following embodiments, when layers, areas, components, etc. are connected, the following embodiments include both the case where layers, areas, and components are directly connected, and the case where layers, areas, and components are indirectly connected with other layers, areas, and components intervening between them. For example, when layers, areas, components, etc. are electrically connected, the present disclosure includes both the case where layers, areas, and components are directly electrically connected, and the case where layers, areas, and components are indirectly electrically connected with other layers, areas, and components intervening between them.

[0049] In a preferred embodiment of the present disclosure, a front-rear direction refers to a longitudinal direction of a vehicle, an up-down direction refers to a height direction of the vehicle, and a left-right direction refer to a width direction of the vehicle.

[0050] = Door latch 10 for vehicle without outside door handle =

[0051] FIG. 1 is a side view of a vehicle on which a door latch for vehicle without outside door handle according to a preferable embodiment of the present disclosure is mounted. FIG. 2a is a plan view schematically illustrating various door open operating units connected to the door latch for vehicle without outside door handle of FIG. 1. FIG. 2b is a block diagram schematically illustrating an operation mechanism of a front door latch part and a rear door latch part.

[0052] The door latch 10 for vehicle according to the present embodiment can be applied to a vehicle without outside door handle.

[0053] Referring to FIGS. 1 and 2a, the door latch 10 for vehicle may open a closed front door FD by a user's touch of front inside and outside open switches 1a and 1b installed on inner and outer sides of the front door FD. Further, the door latch 10 for vehicle may open a closed rear door RD by a user's touch of rear inside and outside open switches 2a and 2b installed on inner and outer sides of the rear door RD. Referring to FIG. 2a, a door lock / unlock switch 7 may be installed on the inside of the front door FD and the rear door RD to individually control the front and rear doors. Further, referring to FIG. 2a, a child lock switch 8 may be installed inside a driver's seat at the front door FD to lock and unlock the rear door RD.

[0054] Referring to FIGS. 1 and 2a, the door latch 10 for vehicle may open the closed front door FD by a user's key manipulation of a front key cylinder 3 installed on the outside of the front door FD.

[0055] Referring to FIG. 2a, the door latch 10 for vehicle may open the front door FD by a user's pulling of a front inside door lever 4 installed on the inside of the front door FD. Further, the door latch 10 for vehicle may open the rear door RD by a user's pulling of a rear inside door lever 5 installed on the inside of the rear door RD.

[0056] Referring to FIG. 2b, the door latch 10 for vehicle without outside door handle may include a front door latch 10F installed on the front door FD and a rear door latch 10R installed on the rear door RD.

[0057] The front open switches 1a and 1b or the rear open switches 2a and 2b may drive an open motor 910 of the front door latch 10F or an open motor 910 of the rear door latch 10R.

[0058] The front key cylinder 3 may always open a front open block 600 by pulling a front door key connector 60.

[0059] The front inside door lever 4 may always open the front open block 600 by pulling a front inside door lever connector 70. Further, the rear inside door lever 5 may always open a rear open block 600 by pulling a rear inside door lever connector 40.

[0060] For reference, FIG. 2b illustrates that a safety motor 510 and the open motor 910 are arranged side by side front and rear, but they may be arranged in any direction, such as a diagonal or vertical direction, as long as there are no functional and structural problems.

[0061] = Rear door latch 10R =

[0062] <Rear inside door lever connector 40>

[0063] Referring to FIGS. 2b, 3 and 16, a rear inside door lever connector 40 may connect between the rear inside door lever 5 and the rear open block 600. The rear inside door lever connector 40 may include an open cable that is pulled by pulling the rear inside door lever 5. A return spring 45 which is a compression coil spring may be fitted and installed on an outer peripheral surface of a rear open cable. Therefore, as illustrated in FIG. 16, the return spring 45 is installed between a rear insert cover 200 and the rear open block 600 and can elastically return the pulled open block 600.

[0064] <Rear housing 100>

[0065] Referring to FIGS. 3 and 7, the rear door latch 10R according to the present embodiment may include a rear housing 100 forming an external appearance. The rear housing 100 may include a rear main cover 110 which is a first housing.

[0066] A first striker insertion groove 111 into which a striker (not shown) is inserted may be formed on a front surface of the rear main cover 110. The first striker insertion groove 111 may be formed as a deep groove in which a front side and a left side are open.

[0067] A ratchet installation groove 112 and a pawl installation groove 113, in which a rear ratchet 310 and a rear pawl 330 are pivotably installed, may be formed on the front surface of the rear main cover 110. The ratchet installation groove 112 and the pawl installation groove 113 may be formed to have a shallower depth than the first striker insertion groove 111.

[0068] Referring to FIG. 16, a ratchet return spring 115 may be installed on the front surface of the rear main cover 110. The ratchet return spring 115 may be a torsion spring. One end of the ratchet return spring 115 may be caught on the rear ratchet 310, and other end of the ratchet return spring 115 may be caught on the rear main cover 110. In the same manner, a rear pawl return spring 117 which is a torsion spring may be installed on the front surface of the rear main cover 110. One end of the rear pawl return spring 117 may be caught on the rear pawl 330, and other end of the rear pawl return spring 117 may be caught on the rear main cover 110.

[0069] Referring to FIG. 6, a rear open lever 700 may be rotatably installed on a rear surface of the rear main cover 110. Further, a rear cinching lever 2530 may be pivotably installed on the rear surface of the rear main cover 110. A rear cinching actuator connection cable 2520 may be installed on the rear cinching lever 2530. The rear cinching lever 2530 may serve to rotate the rear ratchet 310. The structure and function of the rear cinching lever 2530 refer to the related art, and a detailed description thereof is omitted.

[0070] Referring to FIG. 3, the rear housing 100 may include a rear front plate 120 which is a second housing. The rear front plate 120 may cover a front surface of a rear latch part 300 of the rear main cover 110. A second striker insertion groove 121 may also be formed on the rear front plate 120. Front and rear sides and a left side of the second striker insertion groove 121 may be open to correspond to the first striker insertion groove 111. The rear front plate 120 may be supported on the rear main cover 110 by a pivot axis 311 of the rear ratchet 310 and a pivot axis 331 of the rear pawl 330.

[0071] The rear housing 100 may include a rear back cover 130 which is a third housing. The rear back cover 130 may be fastened to the rear surface of the rear main cover 110. A rear connector 131 may be formed on a rear side of the rear back cover 130.

[0072] <Rear insert cover 200>

[0073] Referring to FIGS. 5 and 6, the rear door latch 10R for vehicle according to the present embodiment may include a rear insert cover 200. The rear insert cover 200 may be assembled inside the rear main cover 110 and the rear back cover 130. The rear insert cover 200 may temporarily assemble and modularize the respective components.

[0074] Referring to FIGS. 8 and 9, the rear insert cover 200 may include a plate-shaped base 210. A first accommodation portion 211 and a third accommodation portion 213 may be disposed in parallel at the rear and the front of the base 210. As illustrated in FIG. 13, a rear safety block 400 may be assembled to the first accommodation portion 211 to be slidable up and down. As illustrated in FIG. 14, the rear open block 600 may be assembled to the third accommodation portion 213 to be slidable up and down. As illustrated in FIG. 15, a second accommodation portion 212 to which a rear safety actuator 500 is assembled may be formed on an upper side of the first accommodation portion 211. A fourth accommodation portion 214 to which the open motor 910 is assembled may be formed on an upper side of the third accommodation portion 213. A fifth accommodation portion 215 may be formed between the second accommodation portion 212 and the fourth accommodation portion 214. An upper side 401 of the rear safety block 400 may be inserted into the fifth accommodation portion 215. Therefore, the rear safety block 400 may be guided to be slidable along an up-down longitudinal direction.

[0075] A support shaft 218 may be formed on the base 210. As illustrated in FIG. 12, the support shaft 218 may be inserted so that a worm wheel 930 and a disk 940 can rotate.

[0076] A front side of the base 210 may be inserted into the inside of the rear main cover 110, and a rear side of the base 210 may be inserted into the inside of the rear back cover 130.

[0077] A leg bracket 217 may be formed on a front lower side of the base 210. The leg bracket 217 may be fastened and supported to the rear main cover 110 and may detect the rear ratchet 310.

[0078] <Rear latch part 300>

[0079] Referring to FIG. 7, the rear door latch 10R for vehicle according to the present embodiment may include the rear latch part 300. The rear latch part 300 may include the rear ratchet 310 and the rear pawl 330. The rear ratchet 310 may serve to restrain or release the inserted striker. The rear pawl 330 may maintain the open of the rear ratchet 310 and the closing of the rear ratchet 310. The structure and function of the rear ratchet 310 and the rear pawl 330 refer to the related art and a detailed description thereof is omitted.

[0080] <Rear safety block 400>

[0081] Referring to FIGS. 8 to 11, the rear door latch 10R for vehicle according to the present embodiment may include the rod-shaped rear safety block 400. The rear safety block 400 may be accommodated in the first accommodation portion 211 and the fifth accommodation portion 215. A first stepped portion 402 pressing a safety block position sensor 430 may be formed on the rear safety block 400. The first stepped portion 402 may be formed on the right side of the rear safety block 400. Therefore, if a concave portion 402a of the first stepped portion 402 is positioned on the safety block position sensor 430, the rear safety block 400 may be in a locked state (see FIG. 18), and if a convex portion 402b of the first stepped portion 402 is positioned on the safety block position sensor 430, the rear safety block 400 may be in an unlocked state (see FIG. 20).

[0082] Further, a second stepped portion 403 may be formed on the rear safety block 400. The second stepped portion 403 may turn on / off a power switch 450 of the open motor 910. That is, when the rear safety block 400 is in the locked state, the power switch 450 may be positioned on a concave portion 403a of the second stepped portion 403 to cut off the power (see FIG. 18). When the rear safety block 400 is in the unlocked state, a convex portion 403b of the second stepped portion 403 may press the power switch 450 to apply the power to the open motor 910 (see FIG. 20). Therefore, by notifying malfunction conditions of the open motor 910 in advance, it is possible to safely implement a state in which it cannot operate or a state in which it can operate.

[0083] <Rear safety actuator 500>

[0084] Referring to FIG. 15, the rear door latch 10R for vehicle according to the present embodiment may include the rear safety actuator 500. The rear safety actuator 500 may slide the rear safety block 400 to a locked position (see FIG. 16) or an unlocked position (see FIG. 19).

[0085] The rear safety actuator 500 may include a safety motor 510.

[0086] The rear safety actuator 500 may include a male threaded rod 520. The male threaded rod 520 may have a worm shape. The male threaded rod 520 may be installed or formed on a rotation axis 511 of the safety motor 510.

[0087] The rear safety actuator 500 may include a female thread 530. The female thread 530 may be formed on one side of the rear safety block 400. The female thread 530 may be fastened to the male threaded rod 520. The female thread 530 may be transferred and slide up and down based on a rotation of the male threaded rod 520.

[0088] <Rear open block 600>

[0089] Referring to FIGS. 8 to 11 and FIGS. 14, 25 and 27, the rear door latch 10R for vehicle according to the present embodiment may include the rod-shaped rear open block 600 in the same manner as the rear safety block 400. The rear open block 600 may be pulled by the rear inside door lever connector 40 connected to the rear inside door lever 5. As illustrated in FIG. 25, the rear open block 600 may be pulled by the rear inside door lever connector 40 only when the rear safety block 400 is in the unlocked position.

[0090] The rear open block 600 may be slidably accommodated in the third accommodation portion 213. A guide protrusion 601 may be formed at a rear end of the rear open block 600. The guide protrusion 601 may be accommodated in a sixth accommodation portion 216. Therefore, the rear open block 600 may be guided to be stably slidable along a front-rear longitudinal direction.

[0091] <Rear open lever 700>

[0092] The rear door latch 10R for vehicle according to the present embodiment may include the rear open lever 700. The rear open lever 700 may pivot the rear pawl 330 by the pulling of the rear open block 600 to open the closing of the rear ratchet 310.

[0093] Referring to FIGS. 6, 7, 11, 18 and 21, the rear open lever 700 may include a rear open lever plate 710. The center of the rear open lever plate 710 may be rotatably installed on an axis formed on the rear surface of the rear main cover 110. The rear open lever 700 may include a first catching pin 720 formed on one side of the rear open lever plate 710. The first catching pin 720 may protrude toward the rear. The first catching pin 720 may be caught on a catching jaw 725 of the rear open block 600 and a catching protrusion 950 of a rear open actuator 900. The rear open lever 700 may include a second catching pin 730. The second catching pin 730 may protrude toward the front. As illustrated in FIG. 7, the second catching pin 730 may disposed in a front-rear through arc groove 735 formed on the rear main cover 110.

[0094] <Rear open block pull blocking part 800>

[0095] Referring to FIGS. 10 and 11, the rear door latch 10R for vehicle according to the present embodiment may include a rear open block pull blocking part 800. The rear open block pull blocking part 800 may block or allow the pulling of the rear open block 600 depending on the locked position (see FIG. 16) or the unlocked position (see FIG. 19) of the rear safety block 400. That is, the rear open block pull blocking part 800 may be an additional safety structure that prevents the rear door from opening when the rear safety block 400 is in the locked state.

[0096] The rear open block pull blocking part 800 may include a cam groove 810 formed on the rear safety block 400. The cam groove 810 may include a horizontal long hole 811 and an inclined long hole 813. The cam groove 810 may be close to an L-shape forming an obtuse angle.

[0097] The rear open block pull blocking part 800 may include a movable link part 830 connecting the cam groove 810 and the rear open block 600. The movable link part 830 may include a lifting link 840, which moves up and down along the cam groove 810, and a fixed link 850 formed on the rear open block 600.

[0098] The lifting link 840 may include a lifting link plate 841. An open block pull blocking groove 820 and a stopper 842 that are caught on the outside of the rear safety block 400 may be formed on the lifting link plate 841. The stopper 842 may limit a highest position of the inclined long hole 813 when the lifting link 840 moves in a locking direction. The open block pull blocking groove 820 may be formed on the lifting link plate 841. The open block pull blocking groove 820 has an inverted U-shape and may be linked to the rear inside door lever connector 40. For example, as illustrated in FIG. 18, when the lifting link 840 is disposed in the inclined long hole 813, the open block pull blocking groove 820 is in a locked position at which it is not caught on a ball 44 installed in a cable of the rear inside door lever connector 40. Therefore, even if the rear inside door lever connector 40 is pulled, the rear open block 600 is not pulled. On the contrary, as illustrated in FIG. 20, when the lifting link 840 is disposed at an initial position of the horizontal long hole 811, the open block pull blocking groove 820 is in an unlocked position at which it is caught on the ball 44 installed in the cable of the rear inside door lever connector 40. Therefore, if the rear inside door lever connector 40 is pulled, the rear open block 600 may be pulled as illustrated in FIG. 26.

[0099] The lifting link 840 may include a first pin 843. The first pin 843 may protrude from one side of the lifting link plate 841 and move along the cam groove 810.

[0100] The lifting link 840 may include a second pin 845. The second pin 845 may be formed to protrude from other side of the lifting link plate 841.

[0101] The movable link part 830 may include the fixed link 850. The fixed link 850 may guide the lifting link 840.

[0102] The fixed link 850 may include a fixed link plate 851 formed on the rear open block 600. The fixed link plate 851 may protrude outward from one side of the rear open block 600. That is, the fixed link plate 851 may overlap the cam groove 810 with the lifting link 840 interposed therebetween.

[0103] The fixed link 850 may include an long hole 853 that is formed in the front-rear direction. The long hole 853 may be formed in the fixed link plate 851. The long hole 853 may guide the up-down movement of the second pin 845.

[0104] Referring to FIG. 11, a lifting guide groove 860 guiding the up-down movement of the lifting link plate 841 may be formed on the rear open block 600. Thus, the lifting link 840 can be stably move up and down by the lifting guide groove 860.

[0105] <Rear open actuator 900>

[0106] Referring to FIGS. 8, 12, 15, 16, 18 and 20, the rear door latch 10R for vehicle according to the present embodiment may include the rear open actuator 900. The rear open actuator 900 may pivot the rear pawl 330 to open the closing of the rear ratchet 310.

[0107] The rear open actuator 900 may include the open motor 910 assembled to the fourth accommodation portion 214.

[0108] The rear open actuator 900 may include a worm 920. The worm 920 may be formed on a rotation axis of the open motor 910.

[0109] The rear open actuator 900 may include the worm wheel 930. The worm wheel 930 may be engaged with the worm 920.

[0110] The rear open actuator 900 may include the disk 940. The disk 940 may have the same rotation axis as the worm wheel 930. The disk 940 and the worm wheel 930 may be formed as one body. The disk 940 and the worm wheel 930 may have the same rotation axis as the support shaft 218.

[0111] As illustrated in FIG. 20, the rear open actuator 900 may include the catching protrusion 950. The catching protrusion 950 may be formed to protrude at a right angle from a portion of a circumference of the disk 940. The catching protrusion 950 may be exposed through a concave groove 219 formed on one side of the base 210. The catching protrusion 950 may be caught on the first catching pin 720 of the rear open lever 700. That is, the first catching pin 720 may be pushed by the catching protrusion 950 if the first catching pin 720 electrically operates, and may be pushed by the catching jaw 725 if the first catching pin 720 mechanically operates.

[0112] <Rear open drive blocking part 1000>

[0113] Referring to FIGS. 11 and 21, the rear door latch 10R for vehicle according to the present embodiment may include a rear open drive blocking part 1000.

[0114] The rear open drive blocking part 1000 may block or allow a drive of the rear open actuator 900 depending on the locked position or the unlocked position of the rear safety block 400.

[0115] As illustrated in FIGS. 20 and 21, the rear open drive blocking part 1000 may include a cutting line 1001 that cuts a portion of the circumference of the disk 940.

[0116] The rear open drive blocking part 1000 may include a safety plate 1003. The safety plate 1003 may be formed to protrude from one side of the rear safety block 400. The safety plate 1003 may be disposed above the cutting line 1001 or within a rotation radius that can block the disk 940. Therefore, a rotation space of the disk 940 may be blocked or allowed based on a relative position of the safety plate 1003 and the cutting line 1001.

[0117] Below, an operational relationship between the components of the rear door latch 10R described above is described.

[0118] FIGS. 16 to 18 illustrate that it is impossible to open the rear door of the vehicle in the locked state of the rear safety block 400. That is, the lifting link 840 may be positioned at a high point of the inclined long hole 813 of the cam groove 810 (see FIG. 16), the rear ratchet 310 may be locked by the rear pawl 330 (see FIG. 17), and the safety plate 1003 may be disposed above the cutting line 1001 that blocks the rotation space of the disk 940 (see FIG. 18).

[0119] In order for the rear safety block 400 to change from the locked state to the unlocked state, when a signal, such as the approach of a smart key or the pressing of the smart key, is input to apply power to the safety motor 510 and the female thread 530 is pulled by rotating the male threaded rod 520, the lifting link 840 may be positioned at an initial low point of the horizontal long hole 811 of the cam groove 810 while the rear safety block 400 and the safety plate 1003 are pulled together (see FIG. 19), and the safety plate 1003 may be disposed above the cutting line 1001 that allows the rotation of the disk 940 (see FIG. 20).

[0120] When the rear safety block 400 presses the power switch 450 and electricity is connected to apply power to the open motor 910 as illustrated in FIGS. 19 and 20, the worm wheel 930 and the disk 940 may rotate through the worm 920 and the catching protrusion 950 may rotate the rear open lever 700 as illustrated in FIG. 21. When the rear open lever 700 rotates, the rear pawl 330 may open the closed rear ratchet 310 while pivoting, thereby achieving the open state of the rear door (see FIGS. 20 to 22).

[0121] When the closing of the rear ratchet 310 is opened as illustrated in FIGS. 21 and 22, the rear ratchet 310, the rear pawl 330, the rear open lever 700, and the disk 940 may be returned by the return springs 115 and 117 as illustrated in FIG. 23, and the opening of the rear door may be possible because the rear ratchet 310 is in the open position.

[0122] FIGS. 25 and 26 illustrate the open of the rear door using the rear inside door lever connector 40.

[0123] Referring to FIGS. 19 and 20, when the rear inside door lever connector 40 is pulled at a starting position of the unlock of the rear safety block 400, the lifting link 840 may move along the horizontal long hole 811 of the cam groove 810 while the rear open block 600 is pulled (see FIG. 25). Then, the catching jaw 725 of the rear open block 600 may rotate the rear open lever 700 to open the closing of the rear latch part 300 (see FIG. 26).

[0124] <Rear door knob connector 50>

[0125] In the rear door latch 10R described above, the rear open block 600 cannot be pulled when the rear safety block 400 is in the locked state, and the rear open block 600 can be pulled when the rear safety block 400 is in the unlocked state. Therefore, in the event of an emergency such as discharge or malfunction, the rear door RD cannot be manually opened.

[0126] To resolve the emergency, as illustrated in FIGS. 27a and 27b, a rear door knob connector 50 may be connected between a rear door knob 6 and the rear safety block 400. That is, when the rear door knob 6 is pressed, a cable 53 of the rear door knob connector 50 may push the rear safety block 400 and thus the manual opening which is in the lock state may not be possible (see dotted line of FIG. 29). When the rear door knob 6 is pulled, the cable 53 of the rear door knob connector 50 may pull the rear safety block 400 and thus the manual opening which is in the unlock state (see dotted line of FIG. 29) may be possible (see solid line of FIG. 29).

[0127] FIG. 28 is a perspective view illustrating the door latch for vehicle without inside door handle in which an inside door knob connector is added to the rear safety block of FIG. 3. FIG. 29 is a left side view illustrating that a rear back cover is removed from FIG. 28.

[0128] Referring to FIG. 28, the rear door knob connector 50 may include a sliding groove 51. The sliding groove 51 may be a long hole that passes through the rear back cover 130 forward and backward.

[0129] Referring to FIGS. 28 and 29, the rear door knob connector 50 may include an operating piece 52. The operating piece 52 may move up and down along the sliding groove 51. The operating piece 52 may protrude at a right angle with respect to a sliding direction of the rear safety block 400. The operating piece 52 may be exposed to the outside of the rear housing 100 through the sliding groove 51.

[0130] The rear door knob connector 50 may include a rear door knob cable 53. One end of the rear door knob cable 53 may be installed on the operating piece 52 by a ball 53a, and other end may be connected to the rear door knob 6. A portion of the rear door knob cable 53 may be disposed inside a direction changing elbow 54 to be able to be pulled and pushed. The direction changing elbow 54 may be installed on a support bracket 55 of the rear back cover 130.

[0131] In the present embodiment, although the cable is vertically disposed using the direction changing elbow 54, the rear door knob connector 50 may be disposed in the same direction as the rear inside door lever connector 40 as illustrated in FIG. 27b.

[0132] = Front door latch 10F =

[0133] FIG. 30 is a perspective view illustrating a front door latch without outside door handle. FIGS. 31 and 32 are left and right perspective views illustrating that a housing and an insert cover are removed from FIG. 30.

[0134] Referring to FIGS. 1, 2a, 2b, 27a, 27b, and 30 to 32, the front door latch 10F is almost similar in structure and function to the rear door latch 10R, but is different from the rear door latch 10R in that there is no rear open block pull blocking part 800.

[0135] Due to such a difference, the front door latch 10F may include the front door key connector 60 and the front inside door lever connector 70 that can always open the front open block 600.

[0136] Therefore, the same components of the front door latch 10F as those of the rear door latch 10R are given the same reference numerals, and detailed descriptions are omitted.

[0137] The front door latch 10F may include a front latch part 300 including a front ratchet 310 and a front pawl 330, a front safety block 400, a front safety actuator 500 that slides the front safety block 400, the front open block 600 that is always pulled by the front door key connector 60 or the front inside door lever connector 70 connected to the front key cylinder 3 or the front inside door lever 4 of the front door FD, and a front open lever 700 that pivots the front pawl 330 by the pulling of the front open block 600 to open the closing of the front ratchet 310.

[0138] The front door latch 10F may further include a front open actuator 900 that pivots the front pawl 330 to open the closing of the front ratchet 310.

[0139] The front door latch 10F may further include a front open drive blocking part 1000 that blocks a drive of the front open actuator 900 based on a position of the front safety block 400.

[0140] Therefore, in normal times, a signal, such as the approach of a smart key or the pressing of the smart key, can be input to release the front open drive blocking part 1000 by the operation of the front safety actuator 500, and then an input of the front outside open switch 1b can be received to rotate the front open lever 700 by the operation of the front safety actuator 500 and to open the closing of the front latch part 300. When the closing of the front latch part 300 is opened, the user can insert his or her hand into a gap generated by the elasticity of the packing against the door body and pull the front door FD or pull a separate knob fixed to the door to open the front door and get into the vehicle.

[0141] On the other hand, in the event of an emergency such as discharge or breakdown, when the user pulls the front door key connector 60 or the front inside door lever connector 70 by operating the front key cylinder 3 from outside the vehicle or operating the front inside door lever 4 from inside the vehicle, the closing of the front latch part 300 can be manually opened due to a rotation of the front open lever 700 while the front open block 600 is pulled.

[0142] Some embodiments or other embodiments of the present disclosure described above are not mutually exclusive or distinct from each other. Configurations or functions of some embodiments or other embodiments of the present disclosure described above can be used together or combined with each other.

[0143] It is apparent to those skilled in the art that the present disclosure can be embodied in other specific forms without departing from the spirit and essential features of the present disclosure. Accordingly, the above detailed description should not be construed as limiting in all aspects and should be considered as illustrative. The scope of the present disclosure should be determined by rational interpretation of the appended claims, and all modifications within an equivalent scope of the present disclosure are included in the scope of the present disclosure.

[0144] [Description of Reference Numerals]

[0145] 10: door latch for vehicle without outside door handle

[0146] 10F: front door latch for vehicle

[0147] 10R: rear door latch for vehicle 40: rear inside door lever connector

[0148] 50: rear door knob connector 51: sliding groove

[0149] 52: operating piece 53: rear door knob cable

[0150] 54: direction changing elbow 55: support bracket

[0151] 60: front door key connector 70: front inside door lever connector

[0152] 100: housing 110: main cover

[0153] 120: front plate 130: rear cover

[0154] 200: insert cover 210: base

[0155] 211-215: first to fifth accommodation portions

[0156] 218: support shaft 300: latch part

[0157] 310: ratchet 330: pawl

[0158] 400: safety block 500: safety actuator

[0159] 510: safety motor 520: male threaded rod

[0160] 530: female thread 600: open block

[0161] 700: open lever 800: rear open block pull blocking part

[0162] 810: cam groove 811: horizontal long hole

[0163] 813: inclined long hole 820: open block pull blocking groove

[0164] 830: movable link part 900: open actuator

[0165] 910: open motor 920: worm

[0166] 930: worm wheel 940: disk

[0167] 950: catching protrusion 1000: open drive blocking part

[0168] 1001: cutting line 1003: safety plate

Claims

1.A door latch for vehicle without outside door handle comprising:a front door latch installed on a front door; anda rear door latch installed on a rear door,wherein the rear door latch includes:a rear latch part including a rear ratchet and a rear pawl;a rear safety block;a rear safety actuator configured to slide the rear safety block;a rear open block that is pulled by a rear inside door lever connector connected to a rear inside door lever of the rear door;a rear open lever configured to pivot the rear pawl by a pulling of the rear open block and open a closing of the rear ratchet; anda rear open block pull blocking part configured to block the pulling of the rear open block based on a position of the rear safety block,wherein the front door latch includes:a front latch part including a front ratchet and a front pawl;a front safety block;a front safety actuator configured to slide the front safety block;a front open block that is always pulled by a front inside door lever connector connected to a front inside door lever of the front door; anda front open lever configured to pivot the front pawl by a pulling of the front open block and open a closing of the front ratchet.2.The door latch for vehicle without outside door handle of claim 1, wherein the rear safety block and the rear open block are disposed at an interlocking position,wherein the rear open block pull blocking part includes:a cam groove including an inclined long hole and a horizontal long hole formed in the rear safety block; anda movable link part configured to connect the cam groove and the rear open block,wherein when the movable link part is disposed in the inclined long hole, the movable link part maintains a locked state in which the movable link part is not caught on the rear inside door lever connector, andwherein when the movable link part is disposed in the horizontal long hole, the movable link part maintains an unlocked state in which the movable link part is caught on the rear inside door lever connector.3.The door latch for vehicle without outside door handle of claim 2, wherein the movable link part includes:a lifting link configured to move up and down along the cam groove; anda fixed link installed on the rear open block and configured to guide the lifting link.4.The door latch for vehicle without outside door handle of claim 3, wherein the lifting link includes:a lifting link plate;a first pin configured to protrude from one side of the lifting link plate and move along the inclined long hole and the horizontal long hole;a second pin configured to protrude from other side of the lifting link plate; andan open block pull blocking groove formed on a lower side of the lifting link plate,wherein the fixed link includes:a fixed link plate formed on the rear open block; anda long hole formed in the fixed link plate and configured to guide an up-down movement of the second pin.5.The door latch for vehicle without outside door handle of claim 1, further comprising:a rear open actuator configured to pivot the rear pawl and open the closing of the rear ratchet; anda rear open drive blocking part configured to block a drive of the rear open actuator based on a position of the rear safety block.6.The door latch for vehicle without outside door handle of claim 5, wherein the rear safety actuator includes:a safety motor;a male threaded rod configured to receive a rotation power of the safety motor; anda female thread formed on the safety block and screw-fastened to the male threaded rod,wherein the rear open actuator includes:an open motor;a worm configured to receive a rotation power of the open motor;a worm wheel engaged with the worm;a disk configured to receive a rotation power of the worm wheel; anda catching protrusion formed on one side of the disk and configured to rotate the rear open lever,wherein the rear open drive blocking part includes:a cutting line configured to cut a portion of a circumference of the disk; anda safety plate formed on the rear safety block and disposed above the cutting line,wherein a rotation space of the disk is blocked or allowed based on positions of the safety plate and the cutting line.7.The door latch for vehicle without outside door handle of claim 6, further comprising:a rear main cover on which the rear latch part and the rear open lever are installed;a rear back cover configured to cover a rear surface of the rear main cover; anda rear insert cover inserted into the rear main cover and the rear back cover,wherein the rear insert cover includes:a base;a first accommodation portion accommodated in the base so that the rear safety block is slidable;a second accommodation portion formed on one side of the first accommodation portion and configured to accommodate the rear safety actuator;a third accommodation portion accommodated in the base so that the rear open block is slidable and is able to be interlocked with the first accommodation portion;a fourth accommodation portion formed on one side of the third accommodation portion and configured to accommodate the open motor; anda support shaft formed on the base and inserted so that the worm wheel and the disk are able to rotate.8.The door latch for vehicle without outside door handle of claim 4, further comprising:a rear door knob connector configured to slide the rear safety block by a manipulation of a rear door knob of the rear door and position the lifting link in the horizontal long hole or the inclined long hole.9.The door latch for vehicle without outside door handle of claim 8, wherein the rear door knob connector includes:a sliding groove formed to pass through the rear back cover for a knob connection to the rear back cover; anda rear door knob cable including one end installed on the rear safety block and other end connected to the rear door knob.10.The door latch for vehicle without outside door handle of claim 9, wherein a portion of the rear door knob cable is supported on the rear back cover and is able to freely apply a direction change and an arrangement.11.The door latch for vehicle without outside door handle of claim 6, wherein when the rear safety block is in a locked state, a power switch of the open motor cuts off a power of the open motor, andwherein when the rear safety block is in an unlocked state, the power switch of the open motor applies the power to the open motor.12.The door latch for vehicle without outside door handle of claim 1, wherein the front open block is connected to a front key cylinder of the front door and is always pulled by a front door key connector.

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