Latching device for a vehicle door

Abstract

A latch device for a vehicle door is provided. The latch device includes a claw-shaped lever which is restricted by a pawl lever to lock a striker when the vehicle door is operated in a closed state and is released from the pawl lever to unlock the striker when the vehicle door is operated in an open state, and an elastic member configured to adjust an elastic force provided to the claw-shaped lever when the claw-shaped lever is rotated in a state in which a first end of the elastic member is movably inserted into a slot of the claw-shaped lever.

Description

Technical Field

[0001] This invention relates to a latching device for a vehicle door. More specifically, this invention relates to a latching device for a vehicle door constructed in which a bidirectional torsion spring is applied to a claw-shaped bar to increase resistance to the latch and impact member when the door is opened, and to reduce resistance when the door is closed, thereby improving door closing performance, increasing the elastic force acting during the initial opening phase of the door, and thereby reducing door opening noise. Background Technology

[0002] Typically, the outer handle is installed on the outside of the door to open or close the door, the inner handle is installed on the inside of the door, and the door latch assembly is installed on the inside of the door panel to connect to the impact member fixed to the body, thereby performing locking or unlocking operations.

[0003] Therefore, when a user operates the open button, such as on a remote control or key, to open the car door, the solenoid of the door latch assembly, which receives a signal from the remote control, operates in the opening direction to unlock the door latch. Subsequently, when the user pulls the outer door handle in the opening direction, the door is opened.

[0004] Here, the door latch assembly typically includes a pawl lever and a claw lever. The pawl lever rotates in the opening direction when the door is locked, and the claw lever is restrained by the pawl lever to lock the impact component when the door is closed, and is released from the pawl lever to unlock the impact component when the door is opened.

[0005] In addition, a first locking protrusion and a second locking protrusion are formed on the claw-shaped rod, so that the claw-shaped rod of the impact limiting component cooperates with the locking claw rod to form a two-stage limiting state.

[0006] Therefore, if the impact component enters the groove in the claw-shaped rod, the claw-shaped rod will rotate in one direction. At this time, the first locking protrusion of the claw-shaped rod is locked by the locking claw rod, which is the first stage of the limiting state.

[0007] Subsequently, when the claw rod is pushed by the impactor and rotates completely, the second locking protrusion of the claw rod is locked by the claw rod, which is the second stage of the restricted state.

[0008] Conversely, if the release force is transmitted to the pawl lever to move the pawl lever from the locked position where the pawl lever is in the second-stage restricted state to the unlocked position, the pawl lever separates from the pawl lever.

[0009] Ultimately, if the pawl lever receiving the operating force separates from the claw-shaped lever, then when an opening force is applied to the door, the claw-shaped lever rotates in the separation direction, thereby placing the impact component in a state where it can separate from the claw-shaped lever.

[0010] Therefore, the factors related to the opening and closing of the car door latch assembly can be divided into three forces: the sealing strip repulsion force, the claw rod rotation force, and the user's opening force. Since the sealing strip is an elastic rubber material that has the function of sealing the inside and outside of the vehicle, the sealing strip repulsion force is applied in the opening direction when the car door is opened to increase the opening speed. The claw rod rotation force is always applied in the opening direction through the spring to interfere with the closing operation and increase the opening speed.

[0011] Furthermore, closing the car door relies entirely on the user's force, while opening the door is affected by the user's opening force, the repulsive force of the sealing strip, and the rotational force of the claw rod. Therefore, when the car door is opened, the claw rod and the impact component are separated by a greater force instantaneously.

[0012] In other words, in the door latch assembly, apart from the user's force, all the forces of the operating mechanisms are applied in the direction of door opening, making it more difficult to close the door. Furthermore, the sound of the door opening may be louder.

[0013] The above description is only for the purpose of helping to understand the background of the present invention and does not mean that the present invention falls within the scope of related technologies known to those skilled in the art. Summary of the Invention

[0014] Therefore, the present invention takes into account the above-mentioned problems in the related art, and the object of the present invention is to provide a latching device for a vehicle door, wherein when a bidirectional torsion spring is applied to a claw-shaped bar to increase the resistance to the latch and the impact member when the vehicle door is opened and to reduce the resistance when the vehicle door is closed, the first end of the torsion spring can move left and right within the slot of the claw-shaped bar, and can move elastically along a movement guide provided in the latch to adjust the elastic force of the torsion spring, thereby increasing the elastic force acting in the direction opposite to the rotation direction of the claw-shaped bar during the initial opening phase of the vehicle door, thereby reducing the door opening noise.

[0015] To achieve the above-mentioned objective of the present invention, the present invention provides a latching device for a vehicle door, the latching device comprising: a claw-shaped bar, which is limited by a pawl bar to lock an impact member when the vehicle door is operated in a closed state, and to release from the pawl bar to unlock the impact member when the vehicle door is operated in an open state; and an elastic member configured to adjust the elastic force supplied to the claw-shaped bar when the claw-shaped bar is rotated with a first end of the elastic member movably inserted into a slot of the claw-shaped bar.

[0016] When the door switches from the closed state to the open state, the elastic member can provide additional elastic force in the opposite direction to the rotation direction of the claw rod.

[0017] With the second end of the elastic member fixed to the latch body and spaced apart from the claw rod, the elastic member can adjust the strength of the elastic force by rotating the claw rod.

[0018] The elastic member can be configured to operate such that when the claw rod rotates to lock the impact member, the first end of the elastic member inserted into the slot moves from a first position to a second position, and when the claw rod rotates to unlock the impact member, the first end of the elastic member moves from the second position to the first position.

[0019] The latching device may further include a movement guide disposed on the latch body to guide the movement path of a resilient member inserted into the movement guide. The movement guide may include: a first movement path configured to guide the resilient member to a maximum compression position when the pawl lever is rotated to lock or unlock the impact member; and a second movement path extending from the first movement path to define a circulation path and guiding a first end of the resilient member from a first position to a second position when the pawl lever is rotated.

[0020] The elastic member can be configured to provide an elastic restoring force to the claw rod in the direction of rotation of the claw rod when the first end of the elastic member is located in the first region of the second movement path as the impactor locks. The elastic member can be configured to provide additional elastic force to the claw rod when the first end of the elastic member moves to a second region of the second movement path that bends from the first region as the impactor switches from the second-stage locked state to the unlocked state. The elastic member can be configured to provide an elastic restoring force to the claw rod in the direction of rotation of the claw rod toward the initial position when the first end of the elastic member moves to a third region of the second movement path that extends from the second region to reach the maximum compression position as the impactor switches to the unlocked state.

[0021] When the impact component is locked, the first moving path can guide the elastic member to the maximum compression position along the direction of door closing. When the impact component is unlocked, the first moving path can guide the elastic member from the point at the end of the third region to the maximum compression position along the direction of door opening.

[0022] When the impact member is locked, the elastic member can provide elastic force along the rotation direction of the claw rod at the maximum compression position to put the door in the first stage of locking. As the elastic member leaves the maximum compression position of the first stage of locking, the elastic member can continuously provide elastic force along the closing direction of the door to put the door in the second stage of locking.

[0023] When the impact component unlocks, the elastic member can provide elastic force along the rotation direction of the claw rod to switch the door from the second-stage locking state to the first-stage locking state, and as the elastic member moves away from the maximum compression position of the first-stage locking state, the elastic member can continuously provide elastic force along the opening direction of the door.

[0024] The elastic member can provide elastic force in the direction of door closing when entering the first area, and can provide elastic force in the direction of door opening when moving to the end of the third area.

[0025] The latching device may further include a stop that, when the impact member is unlocked, is selectively compressed by the central portion of the downwardly moving elastic member as the first end of the elastic member moves to the second position and passes through the second region.

[0026] The stop may include a resilient material that is compressed or released when pressed through the central portion of the resilient member.

[0027] The advantage of this invention is that when a bidirectional torsion spring is applied to a claw-shaped bar to increase resistance to the latch and impact member when the door is opened and to reduce resistance when the door is closed, the first end of the torsion spring can move left and right within the slot of the claw-shaped bar and can move elastically along a moving guide provided in the latch to adjust the spring force of the torsion spring, thereby increasing the spring force acting in the direction opposite to the rotation direction of the claw-shaped bar during the initial opening phase of the door, thereby reducing the door opening noise.

[0028] Furthermore, the present invention has the advantage of providing a torsion spring and a stop made of a material such as rubber to support the torsion spring, and the stop is compressed as the position of the torsion spring changes during the initial opening phase of the door, thus increasing the resistance by rotating the claw rod, thereby suppressing the force of rotating the claw rod to unlock the impact member with a stronger force. Attached Figure Description

[0029] The above and other objects, features and advantages of the present invention will become more clearly understood from the following detailed description taken in conjunction with the accompanying drawings, wherein:

[0030] Figure 1 This is a diagram illustrating the connection relationship between the latch body and the impact member of a latching device for a vehicle door according to an embodiment of the present invention.

[0031] Figures 2A to 2C This is a diagram illustrating problems that arise in related technologies compared to a latching device for a vehicle door according to an embodiment of the present invention.

[0032] Figures 3A to 3D This is a diagram showing a conventional structure compared to a latching device for a vehicle door according to an embodiment of the present invention.

[0033] Figure 4 This is a diagram showing the operating state in a conventional structure compared to a latching device for a vehicle door according to an embodiment of the present invention.

[0034] Figure 5This is a diagram illustrating the connection structure of a latching device for a vehicle door according to an embodiment of the present invention.

[0035] Figure 6 This is a diagram illustrating the horizontal movement of an elastic member in a latching device for a vehicle door according to an embodiment of the present invention.

[0036] Figures 7A to 7D This is a diagram illustrating the movement of an elastic member on a moving guide in a latching device for a vehicle door according to an embodiment of the present invention.

[0037] Figures 8A to 8D This is a diagram illustrating the operation of the elastic member in the latching device for a vehicle door according to an embodiment of the present invention when the vehicle door is opened.

[0038] Figures 9A to 9D This is a diagram illustrating the operation of the resilient member in a latching device for a vehicle door according to an embodiment of the present invention when the vehicle door is closed.

[0039] Figure 10 This is a diagram illustrating a stop in a latching device for a vehicle door according to an embodiment of the present invention.

[0040] Figure 11 This is a diagram illustrating the operational state of a structure including a stop in a latching device for a vehicle door according to an embodiment of the present invention. Detailed Implementation

[0041] Preferred embodiments of the invention will be described in detail below with reference to the accompanying drawings.

[0042] The advantages, features and effects of the present invention will become clearer from the following detailed description taken in conjunction with the accompanying drawings.

[0043] This invention can be embodied in many different forms and should not be construed as being limited to the embodiments set forth herein. Embodiments of the invention will be provided to enable those skilled in the art to understand the invention more fully.

[0044] Furthermore, detailed descriptions will be omitted when it is determined that a detailed description of known techniques related to this invention may obscure the gist of the invention.

[0045] Figure 1 This is a diagram illustrating the connection relationship between the latch body and the impact member of a latching device for a vehicle door according to an embodiment of the present invention. Figures 2A to 2C This is a diagram illustrating problems that arise in related technologies compared to a latching device for a vehicle door according to an embodiment of the present invention. Figures 3A to 3D This is a diagram showing a conventional structure compared to a latching device for a vehicle door according to an embodiment of the present invention. Figure 4This is a diagram showing the operating state in a conventional structure compared to a latching device for a vehicle door according to an embodiment of the present invention.

[0046] also, Figure 5 This is a diagram illustrating the connection structure of a latching device for a vehicle door according to an embodiment of the present invention. Figure 6 This is a diagram illustrating the horizontal movement of a resilient member in a latching device for a vehicle door according to an embodiment of the present invention, and Figures 7A to 7D This is a diagram illustrating the movement of an elastic member on a moving guide in a latching device for a vehicle door according to an embodiment of the present invention.

[0047] also, Figures 8A to 8D This is a diagram illustrating the operation of the resilient member in a latching device for a vehicle door according to an embodiment of the present invention when the vehicle door is opened. Figures 9A to 9D This is a diagram illustrating the operation of the resilient member in a latching device for a vehicle door according to an embodiment of the present invention when the vehicle door is closed.

[0048] Figure 10 This is a diagram illustrating a stop in a latching device for a vehicle door according to an embodiment of the present invention. Figure 11 This is a diagram illustrating the operational state of a latching device for a vehicle door, including a stop member, according to an embodiment of the present invention.

[0049] Usually, such as Figure 1 As shown, the latch body 1 is installed on the inside of the door to open and close the door, and the impact member 2 is fixed to the vehicle body to keep the latch body 1 closed. In addition, the sealing strip 3 is used to reduce the impact when the door is closed and to block the inflow of air and noise between the inside and outside of the door.

[0050] A claw lever 100 and a claw-shaped lever 200 are disposed in the latch body 1. The claw lever 100 is connected to the outer handle of the door to rotate in the opening direction. When the door is operated in the closed state, the claw-shaped lever 200 is restrained by the claw lever 100 to lock the impact member 2. When the door is operated in the open state, the claw-shaped lever 200 is released from the claw lever 100 to unlock the impact member 2.

[0051] Therefore, when the latch body 1 enters the impact member 2 by the force of closing the door, the claw rod 200 rotates to provide a resilient state in the opposite direction to the rotation of the claw rod 200 (see...). Figure 2A The first stage of the lockdown has been reached (see...). Figure 2B At this point, the pawl lever 100 engages with the claw lever 200 to prevent it from being released.

[0052] Of course, the door is not fully closed in this state. To keep the door fully closed, the pawl lever should be turned with greater force to achieve the second-stage locking state (see...). Figure 2C ).

[0053] In a traditional structure, all forces of the operating mechanism, except for the user's force, are applied in the opening direction. In other words, closing the door depends solely on the user's force, while opening the door is accomplished by the user's opening force, the reaction force of the sealing strip 3 made of elastic material, and the rotational force of the claw rod 200. Therefore, when the door is opened, all of the above forces act simultaneously, causing the latch body 1 and the impact member 3 to separate instantaneously, resulting in a loud opening sound.

[0054] In detail, when the car door is opened while the claw lever 200 is locked and fixed by the pawl lever 100 (second-stage locking), the latch body 1 separates from the car door. Then, the claw lever 200 is rapidly subjected to a rotational force in the opening direction via a spring. This rotational force causes the impact member 2 to momentarily separate from the claw lever 200, while simultaneously applying a strong contact pressure between the claw lever 200 and the impact member 2, which has a small contact area. Therefore, if the car door is switched to the open position, a loud opening sound is generated as the contact pressure is lost.

[0055] Therefore, to reduce the noise when the door opens, the resistance between the impact member 2 and the claw rod 200 should be increased to make the door rotate slowly when opening. Conversely, the resistance should be reduced to make the door close easily.

[0056] For this purpose, a resilient member 300 made of torsion spring is traditionally used to selectively apply elastic force in opposite directions. Thus, the resilient member can assist the rotation of the claw rod 200 when the door is opened or closed, thereby improving opening and closing performance.

[0057] For example, in order to close the car door, the elastic member 300 reaches its maximum compression position, such as... Figure 3A and Figure 3B As shown, a spring force is then applied in the closing direction. Consequently, the latching device rotates sequentially along the first-stage locking position and the second-stage locking position, as... Figure 3C and Figure 3D As shown, the closing performance is thus improved due to the reduction in resistance.

[0058] However, if such a traditional structure only rotates to Figure 4 In the first and second stages shown, the elastic force of the elastic member 300, exceeding the reaction force acting on the compression area of ​​the sealing strip, is applied. After passing the maximum compression position of the elastic member 300, the distance between the first and second ends of the elastic member 300, which is made of torsion spring, increases, and the actuating force of the elastic member 300 decreases, thus improving the closing performance.

[0059] However, when the door is opened, the actuating force of the elastic member 300 is in the closed state of the door (second stage locking), that is, in the fourth stage (see Figure 3D The resistance is at its lowest. Therefore, during the initial opening phase of the door, the force that provides resistance to the rotation of the claw rod 200 may not be transmitted. Consequently, the resistance is very small when the door opens, and the claw rod 200 may inevitably rotate rapidly. As a result, the door opening noise cannot be reduced.

[0060] Therefore, the elastic member 300 according to this embodiment can be configured such that when the claw rod 200 rotates in a state where the first end of the elastic member 300 is movably inserted into the slot S formed in the claw rod 200, the first end of the elastic member 300 moves along the moving guide 400 provided on the latch body 1, thereby adjusting the elastic force provided to the claw rod 200.

[0061] That is, when the second end of the elastic member 300 is fixed to the latch body 1 and spaced apart from the claw-shaped bar 200, as Figure 5 As shown, the first end of the elastic member 300 is mounted on the moving guide 400 via the slot S. When the claw rod 200 rotates, the first end of the elastic member 300 moves along the slot S and the moving guide 400, thereby adjusting the strength of the elastic force.

[0062] Preferably, when the claw-shaped lever 200 is released from the claw lever 100 to switch the door from the closed state to the open state, the first end of the elastic member 300 moves along the slot S. Figure 6 Move in the direction indicated by the middle arrow, and simultaneously move sequentially along the first movement path P1 and the second movement path P2 of the movement guide 400, as shown below. Figures 7A to 7D As shown. Therefore, the elastic member 300 can provide additional elastic force in the direction opposite to the rotation direction of the claw rod 200, so that when the door is opened, the additional elastic force can provide resistance to the claw rod 200. Therefore, the speed at which the claw rod 200 separates from the impact member 2 can be physically reduced, thereby reducing the opening noise during the initial opening phase of the door.

[0063] Reference Figure 6 , Figures 7A to 7D When the claw rod 200 rotates to lock the impact member 2, the first end of the elastic member 300 inserted into the slot S moves from the first position R1 of the slot S to the second position R2.

[0064] Furthermore, when the claw lever 200 rotates to unlock the impact member 2, the first end of the elastic member 300 moves from the second position R2 of the slot S to the first position R1. This slot S causes the first end of the elastic member 300, which enters the second movement path P2 of the moving guide 400, to move along the second movement path P2. In other words, when the claw lever 200 rotates, the slot guides the elastic member 300 downwards (see...). Figure 10 This provides additional elastic force to the elastic member 300.

[0065] The following will refer to Figures 8A to 8D as well as Figures 9A to 9D The rotation of the claw rod 200 as the door opens or closes, and the movement of the first end of the elastic member 300 caused by the rotation of the claw rod 200 are described in sequence.

[0066] In order to lock the initial position of impactor 2 ( Figure 8A The first end of the elastic member 300 is located at the first position R1 of the slot S, i.e., the first side of the first path P1. If the claw rod 200 rotates to perform the first-stage locking operation, the elastic member 300 passes through the maximum compression position, and the claw rod is locked by the claw rod 100 in the first-stage locking position.

[0067] Here, after the elastic member 300 passes through the maximum compression position, the elastic force acts in the direction of rotation of the claw rod 200, thereby facilitating the rotation of the claw rod 200 for the first stage of locking.

[0068] Subsequently, in the first phase of lockdown ( Figure 8B The first end of the elastic member 300 moves along the first movement path P1 at a predetermined angle relative to the first movement path P1. If the elastic member 300 applies a greater elastic force, the claw rod 200 rotates, so that the first end of the elastic member 300 enters the first region A of the second movement path P2, for example... Figure 8C The second-stage locking is shown, where the claw-shaped lever is engaged by the pawl lever 100, thus forming a second-stage locking. Figure 8D ).

[0069] Here, the second movement path P2 can be divided into a first region A, a second region B, and a third region C to define the loop path.

[0070] The first region A is configured to provide an elastic restoring force to the first end of the elastic member 300 in the direction of rotation of the claw rod 200 when the impactor 2 is locked. The second region B is configured to bend from the first region A and move the first end of the elastic member 300 as the impactor 2 switches from the second-stage locked state to the unlocked state, thereby providing additional elastic force to the elastic member 300. The third region C is configured to extend from the second region B to connect to the first movement path P1, guide the first end of the elastic member 300 to the maximum compression position when the impactor 2 switches to the unlocked state, and provide an elastic restoring force in the direction of rotation of the claw rod 200 toward the initial position.

[0071] If the second movement path P2 is configured as described above, the impact element 2 switches to the unlocked state to open the door. Figure 9A As shown, the claw rod 200 rotates, so the first end of the elastic member 300 moves toward the second position R2 of the slot S, while moving along the second region B.

[0072] Therefore, the first end of the elastic member 300 moves as described above, causing the elastic member to move downwards, i.e., to be compressed, thereby providing a strong elastic force to the claw-shaped rod 200. Thus, when the impact member 2 switches to the unlocked state, the actuating force of the elastic member 300 increases, thereby providing strong resistance during the initial opening phase of the door and reducing the opening noise.

[0073] Thus, when the impact member 2 switches to the unlocked state, the actuating force of the elastic member 300 increases, and then the first end of the elastic member 300 moves to the third zone C and the first position R1 of the slot S until the first stage lock is released, as shown. Figure 9B and Figure 9C As shown, this provides a spring force in the direction opposite to the rotation direction of the claw-shaped rod 200. Furthermore, after the elastic member passes the maximum compression position, the elastic member 300 provides a spring force in the same direction as the rotation direction of the claw-shaped rod 200. Figure 9D Therefore, when the impact member 2 is unlocked after the first stage of locking is released, the door can be easily opened by the elastic force of the elastic member 300, the user's opening force, and the reaction force of the sealing strip 3.

[0074] like Figure 10 As shown, the latching device for a vehicle door according to this embodiment may further include a stop 500. Such a stop 500 is configured such that, as the impact member 2 unlocks, the first end of the elastic member 300 moves to the second position R2 and passes through the second region B, and the stop 500 is selectively compressed by the central portion of the downwardly moving elastic member 300 (see...). Figure 9A ).

[0075] More preferably, the stop 500 may be formed of an elastic material so as to be compressed or released when pressed through the central portion of the elastic member 300. However, it is not limited to this; the stop may be formed of a compression spring to perform the same function.

[0076] like Figure 10 As shown, when the car door is opened, the first end of the elastic member 30 moves to the second position R2 by the rotation of the claw rod 200. Simultaneously, as the elastic member passes through the second region B, the stop member 500 selectively comes into close contact with the central portion of the downwardly moving elastic member 30. Therefore, during the initial opening phase of the car door, a stronger resistance corresponding to the force exerted by the claw rod 200 on the stop member 500 can be provided.

[0077] As a result, Figure 11 As shown, when the car door is opened in the fourth stage, the elastic force of the elastic member 300 and the elastic force of the stop member 500 are further increased, thereby increasing the actuating force of the elastic member 300 when the impact member 2 switches to the unlocked state, thus providing strong resistance in the initial opening stage of the car door and reducing the opening sound.

[0078] According to the present invention, when a bidirectional torsion spring is applied to a claw-shaped bar to increase resistance to the latch and impact member when the door is opened and to reduce resistance when the door is closed, the first end of the torsion spring can move left and right within the slot of the claw-shaped bar and can move elastically along a moving guide provided in the latch to adjust the elastic force of the torsion spring, thereby increasing the elastic force acting in the direction opposite to the rotation direction of the claw-shaped bar during the initial opening phase of the door, thereby reducing the door opening noise.

[0079] Furthermore, according to the present invention, a torsion spring and a stop made of a material such as rubber to support the torsion spring are provided, and the stop is compressed as the position of the torsion spring changes during the initial opening phase of the door, thus increasing the resistance by rotating the claw rod, thereby suppressing the force of rotating the claw rod to unlock the impact member with a stronger force.

[0080] Although the invention has been described with reference to specific embodiments shown in the accompanying drawings, it will be apparent to those skilled in the art that the invention may be altered and modified in various ways without departing from the scope of the invention as described in the appended claims.

Claims

1. A latching device for a vehicle door, the latching device comprising: The claw-shaped lever, which is restricted by the claw lever, locks the impact component when the door is operated in the closed position, and releases from the claw lever to unlock the impact component when the door is operated in the open position; as well as The elastic member is configured to adjust the elastic force supplied to the claw rod when the claw rod rotates in a state where its first end is movably inserted into the slot of the claw rod. The elastic member is configured to operate such that when the claw rod rotates to lock the impact member, the first end of the elastic member inserted into the slot moves from a first position to a second position; and when the claw rod rotates to unlock the impact member, the first end of the elastic member moves from the second position to the first position. The latching device further includes: A movable guide, disposed on the latch body, guides the movement path of the elastic member inserted into the movable guide. The moving guide includes: The first movement path is configured to guide the resilient member to its maximum compression position when the claw lever rotates to lock or unlock the impact member; and The second movement path extends from the first movement path to define the loop path and guides the first end of the elastic member from the first position to the second position when the claw rod rotates.

2. The latching device for a vehicle door according to claim 1, wherein, When the door switches from the closed state to the open state, the elastic member provides additional elastic force in the opposite direction to the rotation direction of the claw rod.

3. The latching device for a vehicle door according to claim 1, wherein, With the second end of the elastic member fixed to the latch body and spaced apart from the claw rod, the elastic member adjusts the strength of the elastic force by rotating the claw rod.

4. The latching device for a vehicle door according to claim 1, wherein, The elastic member is configured such that when the first end of the elastic member is located in the first region of the second movement path as the impact member locks, it provides an elastic restoring force to the claw rod in the direction of rotation of the claw rod; The elastic member is configured to provide additional elastic force to the claw rod when the first end of the elastic member moves to the second region of the second movement path that bends from the first region as the impact member switches from the second-stage locked state to the unlocked state. The elastic member is configured such that when the first end of the elastic member moves to the third region extending from the second region along the second movement path to reach the maximum compression position as the impact member switches to the unlocked state, it provides an elastic restoring force to the claw rod in the direction of rotation toward the initial position.

5. The latching device for a vehicle door according to claim 4, wherein, When the impactor is locked, the first moving path guides the elastic member to the maximum compression position along the direction of door closing. When the impactor is unlocked, the first moving path guides the elastic member from the point at the end of the third region to the maximum compression position along the direction of door opening.

6. The latching device for a vehicle door according to claim 5, wherein, When the impact member is locked, the elastic member provides elastic force along the rotation direction of the claw rod at the maximum compression position to put the door in the first stage of locking. As the elastic member moves away from the maximum compression position of the first stage of locking, the elastic member continues to provide elastic force along the closing direction of the door to put the door in the second stage of locking.

7. The latching device for a vehicle door according to claim 5, wherein, When the impact component unlocks, the elastic member provides elastic force along the rotation direction of the claw-shaped rod to switch the door from the second-stage locking state to the first-stage locking state. As the elastic member moves away from the maximum compression position of the first-stage locking state, the elastic member continues to provide elastic force along the opening direction of the door.

8. The latching device for a vehicle door according to claim 4, wherein, The elastic member provides elastic force in the direction of door closing when it enters the first area, and provides elastic force in the direction of door opening when it moves to the end of the third area.

9. The latching device for a vehicle door according to claim 4, further comprising: When the impact member is unlocked, the stop member is selectively compressed by the central portion of the downward-moving elastic member as the first end of the elastic member moves to the second position and passes through the second region.

10. The latching device for a vehicle door according to claim 9, wherein, The stop includes a resilient material that is compressed or released when pressed through the central portion of the resilient member.

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