Door latch device

Abstract

To surely prevent a door from being unnecessarily opened.SOLUTION: An open link 20 includes a lever body 21, an inertia lever part 22, and a torsion coil spring 24. Only when the lever body 21 is placed in an unlock position and a door handle is opened in an operating position, the inertia lever part 22 can transmit this operation force to a ratchet lever 14a. When the inertia lever part 22 is rotated to a sensing position against an energizing force, the torsion coil spring 24 functions to tilt the inertia lever part 22 relative to the lever body 21. The lever body 21A is provided with a regulating protrusion 21Ba for inhibiting the inertia lever part 22 from moving to the operating position via the sensing position, which is caused by the inertia lever part 22 in a tilted state being energized in a rotation direction by the torsion coil spring 24 against a block part 22B.SELECTED DRAWING: Figure 13

Description

Technical Field

[0001] The present invention relates to a door latch device.

Background Art

[0002] There is provided a door latch device configured to keep a door closed with respect to a vehicle body so that the door does not inadvertently open even when an impact force is applied to the vehicle body. For example, in the device described in Patent Document 1, an open link that operates when a door handle is operated for opening and releases a ratchet lever is applied, which has a lever body and an inertia lever portion. The lever body moves along with the opening operation of the door handle and is displaceable between an unlock position and a lock position. The inertia lever portion is supported so as to be displaceable between an operating position and a non-operating position with respect to the lever body, and is biased by a biasing spring for release so as to be maintained at the operating position.

[0003] In this door latch device, when an impact force is applied to the vehicle by a side collision or the like, the inertia lever portion moves to the non-operating position against the biasing force of the biasing spring for release. The inertia lever portion that has moved to the non-operating position becomes non-engaged with the ratchet lever even when the lever body moves. Therefore, in a state where the inertia lever portion is disposed at the non-operating position, it is possible to prevent the door from inadvertently opening even if the door handle moves with respect to the vehicle body due to the influence of the impact force.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] By the way, when an impact force is applied to the vehicle body due to a collision or the like, it has been confirmed that the door handle operates in the opening operation direction multiple times within a very short period of time with respect to the vehicle body. The inertial lever portion of the door latch device described above returns to the operating position by the biasing force of the biasing spring for release even after moving to the non-operating position. Therefore, when the door handle operates in the opening operation direction in a state where the inertial lever portion has returned to the operating position, there is a risk of causing a situation where the door is inadvertently opened.

[0006] In view of the above circumstances, an object of the present invention is to provide a door latch device that can more reliably prevent a situation where the door is unnecessarily opened even when an impact force is applied to the vehicle body.

Means for Solving the Problems

[0007] To achieve the above object, a door latch device according to the present invention includes an open link that changes between an unlocked state and a locked state and operates when a door handle is operated to open, and a ratchet lever that releases the engagement state of the ratchet with respect to the latch when an operating force is applied via the open link. The open link is a door latch device capable of transmitting the operating force to the ratchet lever when the door handle is operated to open in the unlocked state. The open link includes a lever body that is displaced to an unlock position corresponding to the unlocked state and a lock position corresponding to the locked state and moves with the opening operation of the door handle, an inertial lever portion that is movable between an operating position and a sensitive position by rotating relative to the lever body about a predetermined axis, and a release biasing member that biases the inertial lever portion in a rotational direction so as to be maintained at the operating position with respect to the lever body. The inertial lever portion can transmit the operating force to the ratchet lever only when the lever body is disposed at the unlock position and the door handle is operated to open while the inertial lever portion is disposed at the operating position. Between the lever body and the inertial lever portion, there are provided a shift biasing member that shifts the inertial lever portion to a shift position in a movement mode different from the rotation when the inertial lever portion rotates to the sensitive position against the biasing force of the release biasing member with respect to the lever body, and a restricting member that prevents the inertial lever portion from moving from the shift position through the sensitive position to the operating position by facing each other along the axis when the inertial lever portion is shifted to the shift position by the shift biasing member.

[0008] Further, the present invention is characterized in that, in the above-described door latch device, between the lever body and the inertial lever portion, there are provided block portions that are arranged side by side along the axis when the inertial lever portion is disposed at the operating position and face each other in the circumferential direction about the axis when the inertial lever portion is shifted to the shift position by the shift biasing member.

[0009] Further, the present invention is characterized in that, in the door latch device described above, the biasing member for shifting biases the inertial lever portion in a direction in which the inertial lever portion tilts with respect to the lever body.

[0010] Further, the present invention is characterized in that, in the door latch device described above, the biasing member for release is a torsion coil spring configured around the axis, and also functions as the biasing member for shifting.

[0011] Further, the present invention is characterized in that, in the door latch device described above, the inertial lever portion and the housing that houses the inertial lever portion are provided with a return portion that abuts against each other when the door handle is opened with a preset return stroke amount in a state where the inertial lever portion is shifted to the shift position, and returns the inertial lever portion to the operating position.

Advantages of the Invention

[0012] According to the present invention, when the inertial lever portion rotates with respect to the lever body to the sensitive position, the inertial lever portion is shifted to the shift position by the biasing member for shifting, and the regulating members face each other along the axis, so that the inertial lever portion is prevented from moving from the sensitive position to the operating position. Therefore, after the inertial lever portion is once arranged at the sensitive position, the ratchet lever does not operate even when the door handle is operated in the opening direction, and it is possible to more reliably prevent the door from being inadvertently opened when an impact force is applied to the vehicle body.

Brief Description of the Drawings

[0013]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Figure 10

Figure 11

Figure 12

Figure 13

Figure 14

Figure 15

Embodiments for Carrying Out the Invention

[0014] Hereinafter, a preferred embodiment of the door latch device according to the present invention will be described in detail with reference to the accompanying drawings. In the following, for convenience, the respective directions are specified in the state of being mounted on a vehicle.

[0015] FIGS. 1 to 3 show a door latch device which is an embodiment of the present invention. The door latch device exemplified here is mounted on a side door of a front hinge arranged on the right side of a four-wheel vehicle, although not shown in the figure, and changes the engagement state with a striker provided on the vehicle body according to an opening operation by a door handle or a locking / unlocking operation by a key, thereby performing opening and closing control of the side door. A latch unit 10 is provided inside a housing 1 in this door latch device.

[0016] The latch unit 10 is configured to include a latch 12 rotatably disposed via a latch shaft 11 and a ratchet 14 rotatably disposed via a ratchet shaft 13. The latch shaft 11 and the ratchet shaft 13 extend substantially horizontally along the front and rear of any vehicle. In the illustrated example, the latch shaft 11 is provided at a portion above the vehicle with respect to the striker entry groove 2 provided in the housing 1, and the ratchet shaft 13 is provided at a portion inward of the vehicle with respect to the latch shaft 11 at a portion below the vehicle with respect to the striker entry groove 2. With respect to the striker entry groove 2, a striker (not shown) enters from the left side in FIG. 1, which is relatively inward of the vehicle, by the closing operation of the side door.

[0017] The latch 12 has a striker contact portion 12a and a hook portion 12b, and is biased in the release direction (clockwise in FIG. 2) by the biasing force of a latch spring (not shown) and is disposed in the meshing standby state. The meshing standby state is a state in which the hook portion 12b retracts upward with respect to the striker entry groove 2, while the striker contact portion 12a is disposed on the inner side (right side in FIG. 2) of the striker entry groove 2. When the side door is closed and the striker enters the striker entry groove 2, the striker contacts the striker contact portion 12a, so that the latch 12 rotates counterclockwise in FIG. 2 against the biasing force of the latch spring, and the hook portion 12b is disposed in a state of crossing the opening end side of the striker entry groove 2.

[0018] The ratchet 14 prevents the latch 12 from rotating in the release direction by engaging with the hook portion 12b when the hook portion 12b of the latch 12 is disposed in a state of crossing the striker entry groove 2. The ratchet 14 is biased in the direction of engaging with the latch 12 (counterclockwise in FIG. 2) by the biasing force of a ratchet spring (not shown). Therefore, when the striker enters the striker entry groove 2 and the hook portion 12b of the latch 12 is disposed to cross the striker entry groove 2, the ratchet 14 engages with the hook portion 12b by the biasing force of the ratchet spring, and this state is maintained.

[0019] As shown in FIGS. 4 and 5, a ratchet lever 14a is integrally provided on the ratchet 14. The ratchet lever 14a extends inward from a portion of the ratchet shaft 13 that is located on the front side of the vehicle with respect to the ratchet 14. When the ratchet lever 14a is pressed upward against the biasing force of the ratchet spring, the ratchet 14 rotates clockwise in FIG. 2, so that the engagement state between the ratchet 14 and the latch 12 can be released.

[0020] As shown in FIGS. 3 to 5, an open link 20 is disposed in a portion below the ratchet lever 14a inside the housing 1. The open link 20 is disposed in the housing 1 so as to be movable up and down by the operations of the outside handle lever 30 and the inside handle lever 40, and to be rotatable about an axis along the left and right directions of the vehicle by the operation of the lock unit 50 to change between an unlocked state and a locked state.

[0021] As shown in FIGS. 1 and 2, the outside handle lever 30 is rotatably disposed at a portion below the ratchet shaft 13 by an outside lever shaft 31 along the front and rear of the vehicle. Although not shown in the figure, an outside door handle of the side door is linked to an end portion of the outside handle lever 30 located on the outside of the vehicle via an outside cable 32. An open lever 33 is disposed at an end portion 30a of the outside handle lever 30 located on the inside of the vehicle so as to be linkable. The open lever 33 is rotatably disposed at a portion on the inside of the vehicle with respect to the outside handle lever 30 and below the outside lever shaft 31 by an open lever shaft 34 along the front and rear of the vehicle, and an engagement end portion 33a located on the inside of the vehicle is engaged with a rotation center portion (an engagement hole 21a described later) of the open link 20.

[0022] When the outside door handle is operated to open, the outside handle lever 30 rotates counterclockwise in FIG. 2 via the outside cable 32, and the open lever 33 rotates clockwise in FIG. 2, and the open link 20 moves upward via the engagement end portion 33a. When the opening operation of the outside door handle is stopped, the open lever 33 rotates counterclockwise by the biasing force of the return spring 35, and the open link 20 and the outside handle lever 30 return to their original states.

[0023] As shown in FIG. 3, the inside handle lever 40 is rotatably disposed at a portion below the open link 20 by an inside lever shaft 41 along the left and right of the vehicle, and a front end portion 40a located on the front side thereof faces the lower end surface of the open link 20. Although not shown in the figure, an inside door handle of the side door is linked to the lower end portion of the inside handle lever 40 via an inside cable 42.

[0024] When the inside door handle is operated to open, the inside handle lever 40 rotates clockwise in FIG. 3 via the inside cable 42, and the open link 20 moves upward via the front end portion 40a of the inside handle lever 40. At this time, as the open link 20 moves upward, the open lever 33 is in a state of rotating clockwise in FIG. 2. Therefore, when the opening operation of the inside door handle is stopped, the open lever 33 rotates counterclockwise by the biasing force of the return spring 35, and the open link 20 and the inside handle lever 40 return to their original states.

[0025] As shown in Fig. 3, the lock unit 50 includes a lock lever 52 that rotates around the axis of a lock shaft 51 along the left and right sides of the vehicle, and engages with the open link 20 via an engagement piece 52a of the lock lever 52. This lock unit 50 includes an actuator unit 53 and a lock cable 54 linked to the lock lever 52. The actuator unit 53 is locked and unlocked by a remote control owned by the vehicle user. The lock cable 54 transmits the lock operation and unlock operation of a lock knob (not shown) provided on the side door to the lock lever 52.

[0026] In this lock unit 50, when the actuator unit 53 or the lock cable 54 is unlocked, the lock lever 52 rotates clockwise in Fig. 3. As a result, the open link 20 assumes an unlocked state that is almost upright, as shown in Fig. 4, due to the biasing force of a return spring (not shown). Similarly, when the actuator unit 53 or the lock cable 54 is locked, the lock lever 52 rotates counterclockwise in Fig. 3. As a result, the open link 20 rotates counterclockwise in Fig. 3 via the engagement piece 52a and assumes a locked state of tilting forward, as shown in Fig. 5. In the present embodiment, as shown in Figs. 8 to 14, the above-described open link 20 configured to have a lever body 21 and an inertia lever portion 22 is applied. For convenience, different patterns of dots are applied to the lever body 21 and the inertia lever portion 22 in the drawings.

[0027] The lever body 21 has an engagement hole 21a and a support shaft portion 21b at its lower end, and a lock engagement portion 21c at its upper end. The engagement hole 21a is an irregularly shaped hole penetrating along the left - right direction of the vehicle. An engagement end portion 33a located on the inner side of the vehicle in the open lever 33 is engaged with this engagement hole 21a in a state where it can rotate relatively and cannot move relatively in the vertical direction. The support shaft portion 21b is in a columnar shape protruding toward the rear side of the vehicle from a portion adjacent to the engagement hole 21a. The lock engagement portion 21c is a protrusion protruding toward the outer side of the vehicle, and is engaged with the engagement piece 52a of the above - mentioned lock lever 52. That is, when the outside door handle or the inside door handle is operated to open, the lever body 21 moves upward via the open lever 33, and is arranged at a locked position tilted forward when the lock unit 50 or the lock cable 54 is operated for locking, while it is arranged at an unlocked position almost upright when the lock unit 50 or the lock cable 54 is operated for unlocking. The locked position and the unlocked position of the lever body 21 respectively correspond to the locked state and the unlocked state of the open link 20.

[0028] The inertia lever portion 22 has an inertia mass portion 22a at its upper end and a sliding hole 22b at its lower end. The inertia mass portion 22a is configured such that the mass of the upper end of the inertia lever portion 22 is larger than that of the lower end. It constitutes a pressing contact surface 22c at the upper end and has a return - use inclined protrusion (return portion) 22d at a portion on the rear side of the vehicle. By inserting the support shaft portion 21b into the sliding hole 22b of this inertia lever portion 22, the inertia lever portion 22 can be supported by the lever body 21 in a state where it can rotate around the axis of the support shaft portion 21b and is inclined such that the upper end portion is at the rear with the lower end portion as the center.

[0029] A regulating plate 23 is provided on the protruding end face of the support shaft portion 21b, and a torsion coil spring (release biasing member and shift biasing member) 24 is provided at a portion of the support shaft portion 21b located between the lever main body 21 and the inertia lever portion 22. The regulating plate 23 is in the shape of a disc having an outer diameter larger than the inner diameter of the sliding hole 22b, and is fixed to the end face of the support shaft portion 21b by a mounting screw 25. The torsion coil spring 24 biases the inertia lever portion 22 to rotate counterclockwise as viewed from the rear side of the vehicle with respect to the lever main body 21, and by pressing the inertia lever portion 22 rearward with respect to the lever main body 21, it functions to tilt (shift) the upper end portion of the inertia lever portion 22 toward the rear side about the lower end portion.

[0030] Block portions 21B and 22B are provided on the lever main body 21 and the inertia lever portion 22, respectively. As shown in FIGS. 10 and 11, the axis of the sliding hole 22b is substantially parallel to the axis of the support shaft portion 21b, and in a state where the inertia lever portion 22 rotates counterclockwise with respect to the lever main body 21 due to the biasing force in the rotational direction of the torsion coil spring 24 (the operating position of the inertia lever portion 22) as viewed from the rear side of the vehicle, they are arranged side by side in the front-rear direction along the axis of the support shaft portion 21b. On the other hand, as shown in FIGS. 12 to 14, in a state where the inertia lever portion 22 rotates clockwise with respect to the lever main body 21 as viewed from the rear side of the vehicle and the inertia mass portion 22a tilts toward the rear side, the block portions 21B and 22B are configured to face each other in the circumferential direction.

[0031] Furthermore, between the block portion 21B of the lever body 21 and the block portion (restricting member) 22B of the inertial lever portion 22, a restricting protrusion (restricting member) 21Ba and a restricting recess 22Ba are provided. The restricting protrusion 21Ba protrudes outward from the upper end portion of the block portion 21B toward the vehicle. The restricting recess 22Ba is a recess formed at a portion corresponding to the restricting protrusion 21Ba at the front end portion of the block portion 22B. The restricting protrusion 21Ba and the restricting recess 22Ba are configured such that when the inertial lever portion 22 tilts with respect to the lever body 21 and when the inertial lever portion 22 rotates counterclockwise as viewed from the rear side of the vehicle due to the biasing force in the rotational direction of the torsion coil spring 24 (shift position of the inertial lever portion 22), they face each other and function to prevent the inertial lever portion 22 from returning to the operating position with respect to the lever body 21.

[0032] When the outside door handle opening operation or the inside door handle opening operation is performed with a larger return stroke amount than normal in a state where the inertial lever portion 22 is disposed at the shift position, the return inclined protrusion 22d abuts against the return protrusion (return portion) 1A of the housing 1 as shown in FIG. 15, and thus moves the inertial lever portion 22 outward with respect to the lever body 21 against the biasing force of the torsion coil spring 24 and then presses it forward. That is, when the outside door handle opening operation or the inside door handle opening operation is performed with a larger return stroke amount than normal in a state where the inertial lever portion 22 is disposed at the shift position, the return inclined protrusion 22d abuts against the return protrusion 1A of the housing 1, so that after the inertial lever portion 22 is moved outward with respect to the lever body 21, it moves forward to reach the sensitive position. As a result, the inertial lever portion 22 rotates counterclockwise as viewed from the rear side of the vehicle due to the biasing force in the rotational direction of the torsion coil spring 24 and returns to the above-described operating position. The return inclined protrusion 22d and the return protrusion 1A are configured to allow the upward movement of the open link 20 without abutting against each other when the open link 20 is disposed at the operating position, and to be able to abut against each other only when the open link 20 moves upward in a state where the open link 20 is disposed at the shift position.

[0033] The door latch device configured as described above is mounted on the vehicle with the support shaft portion 21b of the lever main body 21 extending along the longitudinal direction of the vehicle and the inertial lever portion 22 disposed at the operating position. During normal use, since the inertial lever portion 22 is maintained at the operating position by the biasing force in the rotational direction of the torsion coil spring 24, as shown in FIG. 6, when the lever main body 21 is disposed at the unlock position, that is, when the open link 20 is in the unlocked state, the pressing contact surface 22c of the inertial lever portion 22 faces the lower surface of the ratchet lever 14a. Thus, if the lever main body 21 moves upward by an opening operation of the outside door handle or an opening operation of the inside door handle, the ratchet lever 14a moves upward via the pressing contact surface 22c, the engagement state of the ratchet 14 with respect to the latch 12 is released, and the side door can be opened.

[0034] On the other hand, when the lock unit 50 or the lock cable 54 is lock-operated, the lever main body 21 and the inertial lever portion 22 are integrally tilted forward into a locked state, and the pressing contact surface 22c is disposed in front of the ratchet lever 14a. Therefore, even if the lever main body 21 moves upward by an opening operation of the outside door handle or an opening operation of the inside door handle, the inertial lever portion 22 does not contact the ratchet lever 14a, the engagement state of the ratchet 14 with respect to the latch 12 is maintained, and the side door remains closed with respect to the vehicle body.

[0035] When a lateral impact force or the like is applied to the vehicle described above, the inertial lever portion 22, whose upper end portion becomes the inertial mass portion 22a, rotates against the biasing force in the rotational direction of the torsion coil spring 24 until it exceeds the restricting projection 21Ba and reaches the sensitive position. When this occurs, the inertial lever portion 22 is inclined and arranged with respect to the lever body 21 by the biasing force along the axial direction of the torsion coil spring 24 such that the inertial mass portion 22a is located rearward with the lower end as the center (shift position). As a result, the block portions 21B and 22B overlap each other in the circumferential direction, and the inertial lever portion 22 does not return to the operating position after passing through the sensitive position due to the biasing force in the rotational direction of the torsion coil spring 24. Therefore, as shown in FIG. 7, even when the lever body 21 is arranged at the unlock position, when the inertial lever portion 22 is arranged at the shift position, the pressing contact surface 22c at the upper end is in a non-facing state with respect to the lower surface of the ratchet lever 14a. As a result, from this state, even if the lever body 21 moves upward by an opening operation of the outside door handle or an opening operation of the inside door handle, the pressing contact surface 22c does not contact the ratchet lever 14a, and the engagement state of the ratchet 14 with respect to the latch 12 is maintained, keeping the side door closed.

[0036] Moreover, in this state, at the position where the block portion 22B has exceeded the restricting projection 21Ba, the inertial lever portion 22 is rotated counterclockwise when viewed from the rear side of the vehicle by the biasing force in the rotational direction of the torsion coil spring 24, and the restricting recess 22Ba of the block portion 22B is maintained in a state of facing the restricting projection 21Ba. Therefore, the inertial mass portion 22a of the inertial lever portion 22 cannot move forward with respect to the lever body 21. That is, after the inertial lever portion 22 is arranged at the shift position with respect to the lever body 21, even if the outside door handle or the inside door handle moves due to the influence of the impact force applied to the vehicle body, the inertial lever portion 22 does not return to the operating position after passing through the sensitive position. As a result, there is no risk of inadvertently opening the side door.

[0037] In the above-described embodiment, the door latch device mounted on the side door of a four-wheel vehicle is exemplified. However, it may of course be mounted on other types of vehicles. In this case, if the support shaft portion of the lever body is arranged along the front and rear of the vehicle and the inertial mass portion of the inertial lever portion is positioned upward, it is possible to prevent the door from being inadvertently opened when an impact force is applied in the left-right direction of the vehicle due to a side collision or the like, similar to the embodiment.

[0038] Also, in the above-described embodiment, when the inertial lever portion 22 rotates relative to the lever body 21 to the sensitive position, the inertial lever portion 22 is tilted to shift to the shift position. However, the present invention is not limited to this. For example, it is also possible to configure it to shift to the shift position by sliding the inertial lever portion 22 along the axis of the support shaft portion 21b.

[0039] Furthermore, in the above-described embodiment, the single torsion coil spring 24 is used to perform both the function of biasing the inertial lever portion 22 to maintain it in the operating position with respect to the lever body 21 and the function of biasing the inertial lever portion 22 to the sensitive position. However, each may of course be constituted by individual biasing members.

[0040] Moreover, in the above-described embodiment, the restricting projection 21Ba is provided on the lever body 21. However, a restricting projection may be provided on the inertial lever portion 22, or restricting projections may be provided on both the lever body 21 and the inertial lever portion 22.

Explanation of Reference Numerals

[0041] 1 Housing 1A Return Projection (Return Portion) 12 Latch 14 Ratchet 14a Ratchet Lever 20 Open Link 21 Lever Body 21B Block Portion 21Ba Restricting Projection (Restricting Member) 22 Inertial Lever Portion 22B Block part (restricting member) 22d Return inclined protrusion (return part) 23 Restricting plate 24 Torsion coil spring (releasing biasing member, shifting biasing member)

Claims

1. An open link that changes between an unlocked state and a locked state and operates when the door handle is opened, and a ratchet lever that releases the engagement state of the ratchet with respect to the latch when an operating force is applied through the open link. The open link is a door latch device that can transmit its operating force to the ratchet lever when the door handle is opened in the unlocked state, The open link includes a lever body that is displaced to an unlock position corresponding to the unlocked state and a lock position corresponding to the locked state and moves with the opening operation of the door handle, an inertial lever portion that can move between an operating position and a sensitive position by rotating relative to the lever body about a predetermined axis, and a release biasing member that biases the inertial lever portion in the rotational direction so as to be maintained at the operating position with respect to the lever body. The inertial lever portion can transmit its operating force to the ratchet lever only when the lever body is disposed at the unlock position and the door handle is opened while the inertial lever portion is disposed at the operating position, Between the lever body and the inertial lever portion, there are provided a shift biasing member that shifts the inertial lever portion to a shift position with respect to the lever body in a movement mode different from the rotation when the inertial lever portion rotates to the sensitive position against the biasing force of the release biasing member, and a restricting member that prevents the inertial lever portion from moving from the shift position through the sensitive position to the operating position by facing each other along the axis when the inertial lever portion is shifted to the shift position by the shift biasing member. A door latch device characterized by this.

2. Between the lever body and the inertial lever portion, there are provided block portions that are arranged side by side along the axis when the inertial lever portion is disposed at the operating position and face each other in the circumferential direction about the axis when the inertial lever portion is shifted to the shift position by the shift biasing member. The door latch device according to claim 1, characterized by this.

3. The shift biasing member biases the inertial lever portion with respect to the lever body in a direction to tilt it. The door latch device according to claim 1, characterized by this.

4. The biasing member for release is a torsion coil spring configured around the axis, and the door latch device according to claim 1, characterized in that it also functions as the biasing member for shifting.

5. In the inertia lever portion and the housing that houses the inertia lever portion, when the door handle is opened with a preset return stroke amount in a state where the inertia lever portion is shifted to the shift position, they come into contact with each other, and the door latch device according to claim 1, characterized in that a return portion for returning the inertia lever portion to the operating position is provided.

Images