Vehicle door latch

Abstract

The present invention relates to a vehicle door latch that improves upon technology that can cause safety problems such as malfunctions due to the trend toward electronic installation of vehicle parts, and has an enhanced safety structure that prevents the door from being opened by blocking the open block from being pulled when the safety block is in the locked position.

Description

[Technical Field]

[0001] The present invention relates to a vehicle door latch that improves upon technology that can cause safety problems such as malfunctions due to the trend toward electronic installation of vehicle parts, and has an enhanced safety structure that prevents the door from being opened by blocking the open block from being pulled when the safety block is in the locked position. [Background technology]

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

[0003] In the case of a mechanical vehicle door latch, the door latch can be locked and unlocked by inserting a vehicle key into a key cylinder provided on the outside of the vehicle door and turning the key, which is mechanically connected to the vehicle door latch.

[0004] With the mechanical vehicle door latch in an unlocked state, the user can open the vehicle door by operating an outside handle or an inside handle provided on the vehicle door.

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

[0006] In addition, when the electronic vehicle door latch is unlocked, the user can open the vehicle door by pressing an electronic button provided on the outside or inside of the vehicle.

[0007] A conventional electric vehicle door latch is described in Patent Document 1. In the vehicle door latch system with a safety device in Patent Document 1, the safety plate is always connected only to the emergency cable, and the open plate can be pulled even in the locked state. [Prior art documents] [Patent documents]

[0008] [Patent Document 1] Korean Patent Registration No. 10-2363862 Summary of the Invention [Problem to be solved by the invention]

[0009] The present invention is directed to solving the above-mentioned problems and other problems.

[0010] Another object of the present invention is to improve technology that can cause safety problems such as malfunctions due to the trend toward electronic installation of vehicle parts, and to provide a vehicle door latch with an enhanced safety structure that prevents the open block from being pulled when the safety block is locked.

[0011] Another object of the present invention is to provide a vehicle door latch that can improve assembly efficiency by modularizing each component into a main cover and an insert cover.

[0012] Another object of the present invention is to provide a vehicle door latch that can reduce the number of parts and costs by changing the pull cable of the door handle to a rod structure. [Means for solving the problem]

[0013] To achieve the above and other objects, according to one aspect of the present invention, there is provided a vehicle door latch including: a latch portion including a ratchet and a pawl; a safety block; a safety actuator for sliding the safety block; an open block that is pulled by an open connection portion connected to a door handle; an open lever that rotates the pawl as the open block is pulled, thereby opening the closure of the ratchet; and an open block pull interruption portion that interrupts the pulling of the open block depending on the position of the safety block. [Effects of the Invention]

[0014] The effects of the vehicle door latch according to the present invention will be explained below.

[0015] According to at least one of the embodiments of the present invention, except for special emergency situations, if the safety block is in the locked state, the open block cannot be pulled, so the door cannot be opened.

[0016] According to at least one embodiment of the present invention, each component is pre-assembled in the insert cover and then mounted on the main cover and rear cover, thereby simplifying modular assembly and making it easy to secure space.

[0017] According to at least one embodiment of the present invention, the tension cable is changed to a rod structure, and the handle and latch are directly connected, thereby reducing parts and costs.

[0018] Further scope of applicability of the present invention will become apparent from the following detailed description. However, it should be understood that the detailed description and specific examples, such as preferred embodiments of the invention, are given by way of example only, since various changes and modifications within the spirit and scope of the invention will be apparent to those skilled in the art. [Brief explanation of the drawings]

[0019] [Figure 1]1 is a perspective view of a vehicle door latch according to an embodiment of the present invention connected to a door flush handle, as seen from outside the vehicle. [Figure 2] 1 is a perspective view of a vehicle door latch according to an embodiment of the present invention connected to a door flush handle, as viewed from inside the vehicle. [Figure 3] FIG. 3 is a front perspective view showing the vehicle door latch of FIGS. 1 and 2. [Figure 4] FIG. 3 is a rear perspective view showing the vehicle door latch of FIGS. 1 and 2. [Figure 5] 4 is a front perspective view showing the vehicle door latch of FIG. 3 separated into a main cover, an insert cover, and a rear cover. FIG. [Figure 6] 4 is a rear perspective view showing the vehicle door latch of FIG. 3 separated into a main cover, an insert cover, and a rear cover. FIG. [Figure 7] FIG. 4 is a front view of the main cover of FIG. 3 with the front panel removed. [Figure 8] FIG. 10 is a left perspective view showing the insert cover, the safety actuator, and the open actuator separated from each other. [Figure 9] FIG. 10 is a right perspective view showing the insert cover, the safety actuator, and the open actuator separated from each other. [Figure 10] FIG. 10 is a top perspective view showing the safety block and the open block separated from each other. [Figure 11] FIG. 10 is a bottom perspective view showing the safety block and the open block separated from each other. [Figure 12] This is a plan view of the insert cover with a safety motor and an open motor installed. [Figure 13] FIG. 10 is a plan view showing a safety block installed on the insert cover. [Figure 14] FIG. 10 is a plan view showing an open block installed on an insert cover. [Figure 15] FIG. 10 is a plan view showing the safety actuator and the open actuator, and a rear perspective view of the disk. [Figure 16] FIG. 10 shows the safety block lock and door close. [Figure 17] FIG. 10 shows the safety block lock and door close. [Figure 18] FIG. 10 shows the safety block lock and door close. [Figure 19] 10A and 10B are diagrams showing the unlocked state of the safety block and the door closed state. [Figure 20] FIG. 10 is a diagram showing the unlocked state of the safety block and the door closed state. [Figure 21] 21 is a diagram showing the door in the open state as a result of the operation of the open actuator in the state shown in FIGS. 19 and 20. FIG. [Figure 22] 21 is a diagram showing the door in the open state as a result of the operation of the open actuator in the state shown in FIGS. 19 and 20. FIG. [Figure 23] 23 is a diagram showing the pole being returned to its original position in the state shown in FIGS. 21 and 22. FIG. [Figure 24] 23 is a diagram showing the pole being returned to its original position in the state shown in FIGS. 21 and 22. FIG. [Figure 25] 21 is a diagram showing the door being opened when the outside rod is pulled in the state shown in FIGS. 19 and 20. FIG. [Figure 26] 21 is a diagram showing the door being opened when the outside rod is pulled in the state shown in FIGS. 19 and 20. FIG. [Figure 27] 21 is a diagram showing the state in which the door is opened when the inner cable is pulled in the state shown in FIGS. 19 and 20. FIG. [Figure 28] 21 is a diagram showing the state in which the door is opened when the inner cable is pulled in the state shown in FIGS. 19 and 20. FIG. DETAILED DESCRIPTION OF THE INVENTION

[0020] Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. Regardless of the drawing numbers, identical or similar components are given the same reference numerals, and redundant descriptions thereof will be omitted. The suffixes "module" and "unit" used in the following description are used solely for ease of description and do not have any distinct meanings or functions. Furthermore, when describing embodiments disclosed herein, if a detailed description of related prior art is deemed to obscure the gist of the embodiments disclosed herein, such detailed description will be omitted. Furthermore, the accompanying drawings are provided solely to facilitate understanding of the embodiments disclosed herein, and the technical concepts disclosed herein should not be limited by the accompanying drawings. It should be understood that the accompanying drawings include all modifications, equivalents, and alternatives within the concept and technical scope of the present invention.

[0021] Terms including ordinal numbers such as "first," "second," etc. are used to describe various components, but the components are not limited to these terms. The terms are used only to distinguish one component from another.

[0022] When a component is referred to as being "coupled" or "connected" to another component, it should be understood that it may be directly coupled or connected to the other component, but that there may be other components in between. Conversely, when a component is referred to as being "directly coupled" or "directly connected" to another component, it should be understood that there are no other components in between.

[0023] The singular expression includes the plural expression unless the context clearly indicates otherwise.

[0024] In this application, the terms "comprise" or "have" and the like are intended to specify the presence of any feature, number, step, operation, component, part, or combination thereof described above in the specification, but are to be understood as not precluding the possible presence or addition of one or more other features, numbers, steps, operations, components, parts, or combinations thereof.

[0025] For convenience of explanation, the size of components in the drawings may be exaggerated or reduced. For example, the size and thickness of each component shown in the drawings are arbitrarily shown for convenience of explanation, and the present invention is not necessarily limited thereto.

[0026] It is understood that certain embodiments may be implemented differently, and that the order of certain steps may be different from that illustrated. For example, two steps illustrated as successive may be performed substantially simultaneously, or may be performed in the reverse order from that illustrated.

[0027] In the following examples, when a membrane, region, component, etc. is referred to as being connected, it includes not only the case where the membrane, region, or component is directly connected, but also the case where the membrane, region, or component is indirectly connected via another membrane, region, or component interposed therebetween. For example, in this specification, when a membrane, region, component, etc. is electrically connected, it includes not only the case where the membrane, region, or component is directly electrically connected, but also the case where another membrane, region, component, etc. is indirectly electrically connected therebetween.

[0028] In a preferred embodiment of the present invention, the front and rear refer to the length direction of the vehicle, the up and down direction refers to the height direction of the vehicle, and the left and right direction refers to the width direction of the vehicle.

[0029] 1 and 2, a vehicle door latch 10 according to this embodiment can be connected to a vehicle door flush handle 1. In addition, the vehicle door latch 10 does not have a vehicle door flush handle 1 as in the conventional case, and can open the vehicle door using a touch sensor, a switch, or the like. Therefore, the vehicle door latch 10 can be applied regardless of whether a door handle is provided or not.

[0030] <Open connection part 30> 1, 2, and 25, the open connection portion 30 may include an outside door connection portion 40. The outside door connection portion 40 may include an outside rod 41 that is pulled when the outside handle 3 is pulled. That is, one end of the outside rod 41 may be connected to an outside open rod 43 connected to the open block 600, and the other end of the outside rod 41 may be connected to the vehicle door flush handle 1. The outside rod 41 directly connects the handle and the rod, which may be advantageous for reducing the number of parts and reducing costs. A return spring 45, which is a compression coil spring, may be inserted around the outer periphery of the outside open rod 43. Thus, the return spring 45 is installed between the insert cover 200 and the open block 600 and may elastically return the open block 600 when pulled.

[0031] The open connection part 30 may include an inner door connection part 50. The inner door connection part 50 may include an emergency lever cable that is pulled when the lever inside the vehicle's inside door is pulled. The emergency lever cable may also have a return spring 55, which is a compression coil spring, inserted into its outer periphery. Therefore, the return spring 55 is installed between the insert cover 200 and the open block 600 and can elastically return the pulled open block 600.

[0032] <Enclosure 100> 3 to 7, the vehicle door latch 10 according to this embodiment may include an outer housing 100. The housing 100 may include a main cover 110, which is a first housing.

[0033] A first striker insertion hole 111 into which a striker (not shown) is inserted may be formed on the front surface of the main cover 110. The first striker insertion hole 111 may be a deep groove that is open on the front and left sides.

[0034] A ratchet installation groove 112 and a pole installation groove 113 in which the ratchet 310 and the pole 330 are rotatably installed may be formed on the front surface of the main cover 110. The ratchet installation groove 112 and the pole installation groove 113 may be formed to be shallower than the first striker insertion hole 111.

[0035] 16, a ratchet return spring 115 may be installed on the front surface of the main cover 110. The ratchet return spring 115 may be a torsion spring. One end of the ratchet return spring 115 may be attached to the ratchet 310, and the other end may be attached to the main cover 110. Similarly, a pole return spring 117, which is a torsion spring, may be installed on the front surface of the main cover 110. One end of the pole return spring 117 may be attached to the pole 330, and the other end may be attached to the main cover 110.

[0036] 6, an open lever 700 may be rotatably installed on the rear surface of the main cover 110. In addition, a cinching lever 2530 may be movably installed on the rear surface of the main cover 110. A cinching actuator connecting cable 2520 may be installed on the cinching lever 2530. The cinching lever 2530 rotates the ratchet 310, and its structure and function may be referred to in the prior art, and a detailed description thereof will be omitted.

[0037] 3, the housing 100 may include a front plate 120, which is a second housing. The front plate 120 may cover the front of the latch portion 300 of the main cover 110. A second striker insertion hole 121 may also be formed in the front plate 120. The second striker insertion hole 121 may be open on the front, rear, and left sides to correspond to the first striker insertion hole 111. The front plate 120 may be supported on the main cover 110 by a pivot shaft 311 of the ratchet 310 and a pivot shaft 331 of the pole 330.

[0038] The housing 100 may include a rear cover 130, which is a third housing. The rear cover 130 may be fastened to the rear surface of the main cover 110. A connector 131 may be formed on the rear side of the rear cover 130.

[0039] <Insert Cover 200> 5 and 6, the vehicle door latch 10 according to this embodiment may include an insert cover 200. The insert cover 200 may be assembled inside the main cover 110 and the rear cover 130. The insert cover 200 may be modularized by pre-assembling each component.

[0040] 8 and 9, the insert cover 200 may include a plate-shaped base 210. A first receiving portion 211 and a third receiving portion 213 may be arranged in parallel at the rear and front of the base 210. As shown in FIG. 13, a safety block 400 may be assembled in the first receiving portion 211 so as to be slidable up and down. As shown in FIG. 14, an open block 600 may be assembled in the third receiving portion 213 so as to be slidable up and down. As shown in FIG. 15, a second receiving portion 212 may be formed above the first receiving portion 211, in which a safety actuator 500 may be assembled. As shown in FIG. 16, a fourth receiving portion 214 may be formed above the third receiving portion 213, in which an open motor 910 may be assembled. A fifth receiving portion 215 may be formed between the second receiving portion 212 and the fourth receiving portion 214. The upper portion 401 of the safety block 400 may be inserted into the fifth receiving portion 215. Thus, the safety block 400 may be slidably guided along the vertical length direction.

[0041] A support shaft 218 may be formed on the base 210. A worm wheel 930 and a disk 940 may be rotatably inserted into the support shaft 218, as shown in FIG.

[0042] The front side of the base 210 can be inserted into the main cover 110 , and the rear side of the base 210 can be inserted into the rear cover 130 .

[0043] A leg bracket 217 may be formed at the front lower portion of the base 210, which is fastened to and supported by the main cover 110 and senses the ratchet 310.

[0044] <Latch section 300> 7, the vehicle door latch 10 according to this embodiment may include a latch portion 300. The latch portion 300 may include a ratchet 310 and a pawl 330. The ratchet 310 functions to lock or release an inserted striker. The pawl 330 functions to maintain or open the closed state of the ratchet 310. The structure and function of the ratchet 310 and the pawl 330 may be referred to in the prior art, and a detailed description thereof will be omitted.

[0045] <Safety Block 400> 8 to 11, the vehicle door latch 10 according to this embodiment may include a rod-shaped safety block 400. The safety block 400 may be accommodated in the first receiving portion 211 and the fifth receiving portion 215. A first step portion 402 that presses the safety block position sensor 430 may be formed in the safety block 400. The first step portion 402 may be formed on the right side of the safety block 400. Therefore, when the recessed portion 402a of the first step portion 402 is positioned on the safety block position sensor 430, the latch is in a locked state (see FIG. 18), and when the protruding portion 402b of the first step portion 402 is positioned on the safety block position sensor 430, the latch is in an unlocked state (see FIG. 20).

[0046] Further, a second step portion 403 may be formed on the safety block 400. The second step portion 403 may turn on / off a power switch 450 of the open motor 910. That is, when the safety block 400 is in a locked state, the power switch 450 may be located in a recessed portion 403a of the second step portion 403 to cut off power (see FIG. 18). When the safety block 400 is in an unlocked state, the protruding portion 403b of the second step portion 403 may press the power switch 450 to apply power to the open motor 910 (see FIG. 20). Thus, a malfunction condition of the open motor 910 may be notified in advance, and an inoperable or operable state may be safely implemented.

[0047] <Safety Actuator 500> 15, the vehicle door latch 10 according to this embodiment may include a safety actuator 500. The safety actuator 500 may slide the safety block 400 to a locked position (see FIG. 16) or an unlocked position (see FIG. 19).

[0048] The safety actuator 500 may include a safety motor 510 .

[0049] The safety actuator 500 may include an externally threaded rod 520. The externally threaded rod 520 may be worm-shaped. The externally threaded rod 520 may be attached to or formed on the rotating shaft 511 of the safety motor 510.

[0050] The safety actuator 500 may include an internal thread 530. The internal thread 530 may be formed on one side of the safety block 400. The internal thread 530 may be fastened to an external threaded rod 520. The internal thread 530 may be moved up and down by rotating the external threaded rod 520.

[0051] <Door handle key connection part 550> 18, the vehicle door latch 10 according to this embodiment may include a door handle key connector 550. The door handle key connector 550 may manually lock and unlock the vehicle when the safety actuator 500 is malfunctioning while the vehicle is closed.

[0052] The door handle key coupling part 550 may include a key cylinder 551, a key lever 553 that rotates by rotating the key cylinder 551, and an actuation groove 555 formed at the upper end of the key lever 553. The key cylinder 551 is connected to a set of keys of the flush handle 1 and can be turned with a vehicle key through a key insertion hole on the exterior of the door. The actuation groove 555 is a cylindrical groove in which a key cylinder pin 557 formed on the safety block 400 may be placed. Therefore, the safety block 400 slides by operating the key cylinder 551, and the lifting link 840 may be positioned in the horizontal elongated hole 811 or the inclined elongated hole 813.

[0053] <Emergency lever connection part 570> 3, 5, 8, and 11, the vehicle door latch 10 according to this embodiment may include an emergency lever connector 570. When the vehicle is open, the emergency lever connector 570 manually slides the safety block 400 to position the lifting link 840 in the horizontal slot 811 or the inclined slot 813.

[0054] The emergency lever connecting portion 570 may be formed in a trapezoidal shape and may include a key disc 571 and a first arm 572 and a second arm 573 that protrude respectively from the top and bottom right sides of the key disc 571. The key disc 571 may be rotatably installed in a through-hole 574 of the main cover 110. An emergency lever pin 575 formed in the safety block 400 may be placed between the first arm 572 and the second arm 573. Therefore, the first arm 572 and the second arm 573 may pull or push the emergency lever pin 575.

[0055] <Open Block 600> 1, 2, 8 to 11, 14, 25, and 27, the vehicle door latch 10 according to this embodiment may include a rod-shaped open block 600 in addition to the safety block 400. The open block 600 may be pulled by the open connector 30 connected to the door handle 3. The open block 600 may be pulled by the outside door connector 40 only when the safety block 400 is in the unlocked position, as shown in FIG. 25. Furthermore, the open block 600 may always be pulled by the inner door connector 50 regardless of whether the safety block 400 is locked or unlocked.

[0056] The open block 600 can be slidably accommodated in the third receiving portion 213. A guide protrusion 601 can be formed at the rear end of the open block 600. The guide protrusion 601 can be accommodated in the sixth receiving portion 216. Therefore, the open block 600 can be slidably guided in the longitudinal direction in a stable manner.

[0057] <Open Lever 700> The vehicle door latch 10 according to this embodiment may include an open lever 700. The open lever 700 may rotate the pole 330 by pulling the open block 600, thereby opening the closed position of the ratchet 310.

[0058] 6, 7, 11, 18, and 21, the opening lever 700 may include an opening lever plate 710. The center of the opening lever plate 710 may be rotatably mounted on a shaft formed on the rear surface of the main cover 110. The opening lever 700 may have a first barb pin 720 formed on one side of the opening lever plate 710. The first barb pin 720 may protrude rearward. The first barb pin 720 may be engaged with a barb step 725 of the opening block 600 and a barb protrusion 950 of the opening actuator 900. The opening lever 700 may have a second barb pin 730 formed thereon. The second barb pin 730 may protrude forward. The second barb pin 730 may be disposed in a front-rear through-circular groove 735 formed in the main cover 110 as shown in FIG. 7.

[0059] <Open block pulling interrupter 800> 10 and 11, the vehicle door latch 10 according to this embodiment may include an open block pull interrupter 800. The open block pull interrupter 800 may block or allow pulling of the open block 600 depending on whether the safety block 400 is in the locked (see FIG. 16) or unlocked (see FIG. 19) position. In other words, the open block pull interrupter 800 may be an additional safety structure that prevents the door from being opened when the safety block 400 is in the locked state.

[0060] The open block pull cutoff part 800 may include a cam groove 810 formed in the safety block 400. The cam groove 810 may include a horizontal slot 811 and an inclined slot 813. The cam groove 810 may be approximately L-shaped, forming an obtuse angle with the horizontal slot 811.

[0061] The open block pulling cutoff unit 800 may include a movable link unit 830 that connects between the cam groove 810 and the open block 600. The movable link unit 830 may include a lifting link 840 that moves up and down along the cam groove 810, and a fixed link 850 that is configured in the open block 600.

[0062] The lifting link 840 may include a lifting link plate 841. The lifting link plate 841 may be formed with an open block tension interrupter 800 and a stopper 842 that engages with the outside of the safety block 400. The stopper 842 may limit the highest position of the inclined slot 813 when the lifting link 840 moves in the locking direction. The lifting link plate 841 may be formed with the open block tension interrupter 800. The open block tension interrupter 800 may have an inverted U-shape and may be connected to the outside open rod 43. For example, as shown in FIG. 18 , when the lifting link 840 is disposed in the inclined slot 813, the open block tension interrupter 800 is in a locked position where it does not engage with the ball 44 installed on the cable of the outside open rod 43. Therefore, even if the outside open connection part 40 is pulled, the open block 600 will not be pulled. 20, when the lifting link 840 is placed in the initial position in the horizontal slot 811, the open block pulling cutoff part 800 is in the unlocked position where it is attached to the ball 44 installed on the cable of the outside open rod 43. Therefore, when the outside open connecting part 50 is pulled, the open block 600 can be pulled as shown in FIG.

[0063] The lifting link 840 may include a first pin 843. The first pin 843 protrudes from one side of the lifting link plate 841 and may move along the cam groove 810.

[0064] The lifting link 840 may include a second pin 845. The second pin 845 may be formed to protrude from the other side of the lifting link plate 841.

[0065] The movable link portion 830 may include a fixed link 850. The fixed link 850 may guide the lift link 840.

[0066] The fixed link 850 may include a fixed link plate 851 formed in the open block 600. The fixed link plate 851 may protrude outward from one side of the open block 600. That is, the fixed link plate 851 may overlap the cam groove 810 with the lift link 840 sandwiched therebetween.

[0067] The fixed link 850 may include elongated holes 853 formed at the front and rear. The elongated holes 853 may be formed in the fixed link plate 851. The elongated holes 853 may guide the second pin 845 as it moves up and down.

[0068] 11, the open block 600 may be formed with a lift guide groove 860 for guiding the lift link plate 841 in the lifting direction. Therefore, the lift link 840 may be stably lifted and lowered by the lift guide groove 860.

[0069] <Open Actuator 900> 8, 12, 15, 16, 18, and 20, the vehicle door latch 10 according to this embodiment may include an open actuator 900. The open actuator 900 may rotate the pole 330 to open the closure of the ratchet 310.

[0070] The opening actuator 900 may include an opening motor 910 assembled in the fourth housing 214 .

[0071] The open actuator 900 may include a worm 920. The worm 920 may be formed on the rotation shaft of the open motor 910.

[0072] The open actuator 900 may include a worm wheel 930. The worm wheel 930 may mesh with the worm 920.

[0073] The open actuator 900 may include a disk 940. The disk 940 may have the same rotation axis as the worm wheel 930. The disk 940 may be formed integrally with the worm wheel 930. The disk 940 and the worm wheel 930 may have the same rotation axis as the support shaft 218.

[0074] 20, the open actuator 900 may include a barb protrusion 950. The barb protrusion 950 may be formed by protruding perpendicularly from a portion of the circumference of the disc 940. The barb protrusion 950 may be exposed through a recess 219 formed on one side of the base 210. The barb protrusion 950 may be engaged with the first barb pin 720 of the open lever 700. In other words, the first barb pin 720 may be pushed by the barb protrusion 950 in the case of electrical actuation, or by the barb step 725 in the case of mechanical actuation.

[0075] <Open drive cutoff unit 1000> 11 and 21, the vehicle door latch 10 according to this embodiment may include an open drive cut-off unit 1000.

[0076] The open drive cutoff unit 1000 can cut off or allow the drive of the open actuator 900 depending on the locked or unlocked position of the safety block 400 .

[0077] The open drive cutoff 1000 may include a tear line 1001 cutting out a portion of the circumference of the disk 940 as shown in FIGS.

[0078] The open drive cutoff part 1000 may include a safety plate 1003. The safety plate 1003 may be formed to protrude from one side of the safety block 400. The safety plate 1003 may be disposed above the tear line 1001. Therefore, the rotation space of the disc 940 may be blocked or allowed depending on the relative positions of the safety plate 1003 and the tear line 1001.

[0079] The operational relationship of the above-mentioned components will be explained below.

[0080] 16 to 18 show the state in which the safety block 400 is in the locked state and the vehicle door cannot be opened. That is, the lifting link 840 is located at the high point of the oblique slot 813 of the cam groove 810 (see FIG. 16), the ratchet 310 is closed by the pole 330 (see FIG. 17), and the safety plate 1003 can be positioned above the cutout line 1001 that blocks the rotation space of the disc 940 (see FIG. 18).

[0081] In order for the safety block 400 to switch from the locked state to the unlocked state, a signal is input to apply power to the safety motor 510, which rotates the male threaded rod 520 and pulls the female thread 530. As a result, the safety block 400 and the safety plate 1003 are pulled together, and the lifting link 840 is positioned at the initial low point of the horizontal slot 811 of the cam groove 810 (see FIG. 19), and the safety plate 1003 can be positioned above the cutout line 1001 which allows the disc 940 to rotate (see FIG. 20).

[0082] 19 and 20, when the power switch 450 is pressed to connect electricity and apply power to the open motor 910, the safety block 400 rotates the worm wheel 930 and the disk 940 via the worm 920 as shown in Fig. 21, and the barb 950 rotates the open lever 700. When the open lever 700 rotates, the pawl 330 rotates to open the closed ratchet 310, thereby opening the door (see Figs. 20 to 22).

[0083] As shown in Figures 21 and 22, when the ratchet 310 is opened, the ratchet 310, the pole 330, the open lever 700, and the disc 940 are returned to their original positions by the return springs 115 and 117 as shown in Figure 23, and the ratchet 310 is in the open position, allowing the door to be opened.

[0084] 25 and 26 are diagrams showing the door being opened using the outside door connecting portion 40. FIG.

[0085] 19 and 20, when the outside door connecting part 40 is pulled at the start position of unlocking, the open block 600 is pulled and the lifting link 840 moves along the horizontal slot 811 of the cam groove 810 (see FIG. 25). Then, the engaging step 725 of the open block 600 rotates the open lever 700 to open the latch part 300 (see FIG. 26).

[0086] On the other hand, FIGS. 27 and 28 show the door opening using the inner door connecting portion 50. FIG.

[0087] 19 and 20, when the inner door connecting part 50 is pulled at the start position of unlocking, the open block 600 is pulled and the lifting link 840 moves along the horizontal slot 811 of the cam groove 810 (see FIG. 27). Then, the engaging step 725 of the open block 600 rotates the open lever 700 to open the latch part 300 (see FIG. 26).

[0088] The above-described embodiments of the present invention or other embodiments are not mutually exclusive or distinct, and the respective configurations or functions of the above-described embodiments of the present invention or other embodiments may be used together or combined.

[0089] It is obvious to those skilled in the art that the present invention can be embodied in other specific forms without departing from the spirit or essential characteristics of the present invention. The above detailed description should not be construed as limiting in all respects, but should be considered as illustrative. The scope of the present invention should be determined by reasonable interpretation of the appended claims, and all modifications within the equivalent scope of the present invention are included in the scope of the present invention. [Explanation of symbols]

[0090] 1: Vehicle door flush handle 3: Outside handle 10: Vehicle door latch 30: Open connection part 40: Outside door connection part 41: Outside rod 43: Outside open rod 50: Inner door connection part 100: Housing 110: Main cover 120: Front plate 130: Rear cover 200: Insert cover 210: Base 211-215: 1st to 5th storage compartments 218: Support shaft 300: Latch part 310: Ratchet 330: Pole 400: Safety block 500: Safety actuator 510: Safety motor 520: Male threaded rod 530: Female thread 550: Door handle key connection part 570: Emergency lever connection part 600: Open block 700: Open lever 800: Open block pull cutoff part 810: Cam groove 811: Horizontal long hole 813: Inclined long hole 820: Open block pull cutoff groove 830: Moving link part 900: Open actuator 910: Open motor 920: Wall 930: Worm wheel 940: Disc 950: Barb 1000: Open drive cutoff section 1001: Cutting line 1003:Safety board

Claims

1. a latch portion including a ratchet and a pawl; Safety blocks and a safety actuator that slides the safety block; an open block that is pulled by an outside door connector that is connected to the outside handle of the door; an open lever that rotates the pole by pulling the open block and opens the closed ratchet; and an open block pulling blocking unit that blocks the open block from being pulled depending on the position of the safety block. Vehicle door latch.

2. The safety block and the open block are arranged in parallel, The open block pulling blocking unit is a cam groove in which an oblique slot and a horizontal slot are formed in the safety block; a movable link portion connecting the cam groove and the open block, When the operating link portion is positioned in the oblique slot, the operating link portion maintains a locked state in which it is not engaged with the outside door connecting portion; When the movable link portion is positioned in the horizontal slot, the movable link portion maintains the unlocked state of the outside door connecting portion.

2. The vehicle door latch according to claim 1.

3. The operating link portion is a lifting link that moves up and down along the cam groove; a fixed link installed in the open block and guiding the lifting link; 3. The vehicle door latch according to claim 2.

4. The lifting link is A lifting link plate; a first pin that protrudes from one side of the lifting link plate and moves along the cam groove; a second pin formed to protrude from the other side of the lifting link plate; An open block tension blocking groove is formed on the lower side of the lifting link plate, When the first pin is positioned in the oblique slot, the open block pull-off groove maintains a locked state in which it does not engage with the outside door connecting portion, When the first pin is positioned in the horizontal slot, the open block pull-off groove maintains the unlocked state of the outside door connection portion; The fixed link is: a fixed link plate formed on the open block; a long hole formed in the fixed link plate for guiding the second pin in vertical movement; 4. The vehicle door latch according to claim 3.

5. an open actuator that rotates the pole to open the ratchet; The safety block may further include an open drive cutoff unit that cuts off the drive of the open actuator depending on the position of the safety block.

5. The vehicle door latch according to claim 4.

6. The safety actuator A safety motor; a male threaded rod to which the rotational power of the safety motor is transmitted; The safety block includes a female screw formed on the safety block and screwed to the male threaded rod, The open actuator is An open motor; a worm to which rotational power of the open motor is transmitted; a worm wheel that meshes with the worm; a disk to which the rotational power of the worm wheel is transmitted; a barb formed on one side of the disk for rotating the open lever; The open drive cutoff unit is a cut line formed by cutting out a portion of the circumference of the disk; a safety plate formed on the safety block and positioned above the tear line; The rotation space of the disk is blocked or allowed depending on the positions of the safety plate and the cutting line.

6. The vehicle door latch according to claim 5.

7. a main cover on which the latch portion and the open lever are installed; a rear cover that covers the rear surface of the main cover; an insert cover inserted into the main cover and the rear cover; The insert cover is With the base, a first storage section in which the safety block is slidably stored in the base; a second receiving portion formed on one side of the first receiving portion and configured to receive the safety actuator; a third storage section in which the open block is slidably stored in the base in parallel with the first storage section; a fourth receiving portion formed on one side of the third receiving portion and configured to receive the open motor; a support shaft formed on the base, into which the worm wheel and the disk are rotatably inserted; 7. The vehicle door latch according to claim 6.

8. The outside door connecting portion is an outside open rod connecting the outside handle and the open block; 2. The vehicle door latch according to claim 1.

9. The door handle further includes a key coupling portion for sliding the safety block with a vehicle key inserted through the outside handle, and positioning the lifting link in the horizontal slot or the inclined slot.

4. The vehicle door latch according to claim 3.

10. The safety block may be manually slid while the door is open, and the lifting link may be positioned in the horizontal slot or the inclined slot.

4. The vehicle door latch according to claim 3.

11. If the safety block is in a locked state, the power switch of the open motor cuts off the power supply to the open motor; When the safety block is in an unlocked state, the power switch of the open motor applies power to the open motor.

7. The vehicle door latch according to claim 6.

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