JP6972452B2 - Automotive door latch device - Google Patents

Description

The present invention relates to an automobile door latch device, and more particularly to an automobile door latch device in which a closed state of a door is maintained even in the event of a side collision accident or the like.

Conventionally, as an invention capable of maintaining a closed state of a door when the door is impacted by a side collision accident or the like, there are, for example, those described in Cited Documents 1 and 2.

In the invention described in Cited Document 1, the inertial lever is pivotally supported by an open lever that rotates in conjunction with the operation of the outside handle provided on the outside of the vehicle of the door, and the inertia exceeds the set value due to an impact such as a side collision. When a force is applied, the inertial lever swings from the first position to avoid contact with the housing to the second position to contact the housing and restrain the open lever, thereby opening the door against the intention. It is intended to prevent.

The invention described in Reference 2 operates a latch mechanism having an operation receiving portion for disengaging the striker, an open lever that rotates in conjunction with the operation of the outside handle, and an open lever rotational force. An inertial lever (“transmission member” in Patent Document 2) that can swing to an unlocked position that can be transmitted to the receiving portion and a locked position that cannot be transmitted, and an inertial lever that is urged from the locked position to the unlocked position. On the other hand, when an inertial force exceeding a set value is applied to the inertial lever, the inertial lever is provided with a spring member that allows the inertial lever to move from the unlock position to the locked position, and the inertial lever has an inertial force equal to or higher than the set value. When the spring member moves toward the locked position against the urging force of the spring member due to the action, the spring member is locked to the regulating portion to regulate the urging of the inertial lever toward the unlocked position by the spring member. It is designed to prevent the door from opening unintentionally.

Japanese Patent No. 5948786 Japanese Unexamined Patent Publication No. 2018-3305

In automobiles, airbags are installed in the passenger compartment to protect occupants when an impact is applied to the vehicle body due to a side collision or the like. For this reason, when the airbag is activated by an impact such as a side collision, the impact in the inward direction (direction from the outside of the vehicle to the inside of the vehicle) first acts on the door on the side affected by the impact. , The actuation of the airbag causes an impact in the outward direction (direction from the inside of the vehicle to the outside of the vehicle). As a result, the various movable elements of the automobile door latch device provided in the door are first subjected to the inertial force in the outward direction and then the inertial force in the inward direction.

As described above, when the inertial direction acting on various movable elements is reversed from the outward direction to the inward direction, in the invention described in Patent Document 1, the inertial lever moves from the first position to the second position at the time of a side collision. Nevertheless, it immediately returns to the first position and has a problem that the open lever cannot be reliably restrained.

Further, also in the invention described in Patent Document 2, since the spring member is locked to the regulating portion to regulate the urging of the inertial lever from the locked position to the unlocked position, it acts on the inertial lever. When the inertial direction is reversed, the spring member may come off the regulation portion and the inertial lever may move to the unlocked position.

In view of the above problems, it is an object of the present invention to provide an automobile door latch device capable of reliably maintaining a closed state of a door even when the inertial direction acting on the inertial lever is reversed at the time of a collision. And.

In order to solve the above problems, the present invention has a meshing mechanism capable of holding the door in the closed position by meshing with the striker on the vehicle body side, and the release direction in conjunction with the opening operation of the door handle arranged on the door. A rotatable outside lever and an open link that can swing to an unlock position that can release the engagement of the meshing mechanism and a lock position that cannot be released based on the rotation of the outside lever in the release direction. When an inertial force exceeding a set value is applied, an inertial lever that can rotate against the urging force of the spring is provided, the open link is in the unlock position, and the inertial lever is in the block position from the standby position. When moved to, the inertial lever abuts on the open link to move the open link from the unlocked position to the locked position and prevent the open link from moving from the locked position to the unlocked position. At the same time, it is characterized in that the movement from the block position to the standby position is prevented by engaging with the open link.

Preferably, the inertial lever is rotatably pivotally supported around an axis perpendicular to the swing center axis direction of the open link, and is within the movement locus of the protrusion provided on the open link at the block position. Has an engaging recess that prevents the open link from moving from the locked position to the unlocked position by entering and engaging with the protrusion.

Preferably, the inertial lever is prevented from returning from the block position to the standby position by engaging the protrusion of the open link with the engaging recess.

Preferably, when the inertial lever is in the block position and the open link in the locked position moves with the rotation of the outside lever in the release direction, the inertial lever has the engaging recess in which the engagement recess is open. By detaching from the protrusion of the link, the lever returns to the standby position by the urging force of the spring.

Preferably, the inertia lever is pivotally supported by the Autosai Drever coaxially, wherein the outside lever is rotatable independently.

According to the present invention, when the open link is in the unlock position and the inertial lever moves from the standby position to the block position, the open link is moved from the unlock position to the lock position to unlock from the open link lock position. By preventing the movement to the position and also to prevent the movement from the block position of the open link to the standby position, the direction of the inertial force acting on the inertial lever is reversed in the event of a collision or the like. However, since the movement of the open link from the locked position to the unlocked position and the movement of the inertial lever from the block position to the standby position are prevented, the closed state of the door can be reliably maintained.

It is a side view of the automobile to which the door latch device for automobiles which concerns on this invention is applied. It is a perspective view of the door latch device for automobiles. It is a rear view of the door latch device for automobiles. It is an exploded perspective view of the door latch device for automobiles. It is a side view of the main part of the door latch device for automobiles. (A) is a front view of a main part of a door latch device for an automobile. (B) is a vertical sectional view taken along line aa (a) in the unlocked state. (C) is a vertical sectional view taken along line aa (a) in the locked state. (A) is a front view of a main part of an automobile door latch device when the outside lever is released. (B) is a vertical sectional view taken along line aa (a) in the unlocked state. (C) is a vertical sectional view taken along line aa (a) in the locked state. (A) is a front view of a main part of an automobile door latch device when the inertial lever is rotated to a block position. (B) is a vertical cross-sectional view taken along the line aa (a) on the way to the block position of the inertial lever. (C) is a vertical sectional view taken along the line aa of (a). (D) is an enlarged view of part d of (c). (A) is a front view of a main part of an automobile door latch device when the outside lever is released when the inertial lever is in the block position. (B) is a vertical sectional view taken along the line aa of (a).

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
As shown in FIG. 1, the automobile door latch device 1 is mounted in a door D that is openably and closably supported on the side surface of the vehicle body, and is fixed in the door D as shown in FIGS. 2 and 3. And the meshing mechanism 3 that can hold the door D in the closed state by meshing with the striker S that is assembled to the base structure 2 and fixed to the vehicle body, and various movable elements that will be described later that are assembled to the base structure 2. Be prepared.

As shown in FIG. 1, an outside handle (door handle) OH that is opened when the door D is opened from the outside of the vehicle is provided on the outside of the door D, and the inside of the door D is inside the vehicle. An inside handle (door handle) IH that is opened when the door D is opened from the door D, and a lock knob KN that is operated when the automobile door latch device 1 is switched between the locked state and the unlocked state from the inside of the vehicle are provided.

As shown in FIG. 4, the base structure 2 is fixed in the door D by bolts (not shown), and the box-shaped synthetic resin body 4 having an open rear surface and the body 4 by closing the openings of the body 4 are closed. It includes a metal cover plate 5 fixed in the door D, a back plate 6 (see FIG. 5) fixed to the front side of the body 4, and an L-shaped synthetic resin casing 7 in a plan view.

The meshing mechanism 3 is pivotally supported by a latch shaft 8 in the front-rear direction in an accommodation space formed between the body 4 and the cover plate 5, and is between the latch 9 and the body 4 and the cover plate 5 which can be meshed with the striker S when the door is closed. The ratchet 11 is pivotally supported by the ratchet shaft 10 in the front-rear direction in the accommodation space of the above, and can prevent the latch 9 from rotating in the open direction (clockwise in FIG. 3) by engaging with the outer peripheral edge of the latch 9 when the door is closed. And include. The latch 9 is urged in the open direction by a spring (not shown), and the ratchet 11 is urged in the engaging direction (counterclockwise in FIG. 3) engaged with the outer peripheral edge of the latch 9 by the spring 12. Will be done.

As shown in FIG. 3, when the door D is closed, the striker S enters the striker entry groove 2a of the base structure 2 from the left and engages with the meshing groove 9a of the latch 9. As a result, the latch 9 rotates from the open position (the position rotated by approximately 90 degrees clockwise from the full latch position shown in FIG. 3) to the closed direction (counterclockwise in FIG. 4). The ratchet 11 keeps the door D in the closed state by engaging with the outer peripheral edge of the latch 9 rotated to the full latch position and preventing the latch 9 from rotating in the open direction.

As shown in FIGS. When an inertial force exceeding a predetermined value is applied due to a side collision or the like, the inertial lever 15 that can rotate a predetermined angle around the pivot 13 independently of the outside lever 14 and the ratchet 11 rotate integrally. It includes a possible open lever 16, an open link 17 disposed within the casing 7, a lock lever 18 and an inside lever 19 supported on the inner surface of the casing 7. Further, the casing 7 has a first key lever 20 connected to the key cylinder K via a rod (not shown), a second key lever 21 that can rotate integrally with the first key lever 20, and a portable switch or a vehicle interior. A motor 30 that can rotate forward and reverse by operating an operation switch provided in the vehicle, and a drive gear 31 that is pivotally supported by a pivot shaft 32 that faces the inside and outside of the vehicle and that can rotate forward and reverse by the motor 30 are provided. In addition, in FIG. 5, in order to clarify the meshing mechanism 3, the body 4 is omitted.

The open link 17 and the lock lever 18 form a locking mechanism that can switch between a locked state and an unlocked state. The locking mechanism is an unlocked state that enables the opening of the door D by at least enabling the release operation of the outside lever 14 based on the opening operation of the outside handle OH, and a locked state that disables the opening of the door D. Has a function that can be switched to.

6 (a) is a front view of the base structure 2 in a state where the main movable element is attached to the base structure 2, and FIG. 6 (b) is FIG. 6 (a) when the lock mechanism is in the unlocked state. ) Is a vertical cross-sectional view taken along the line aa, and FIG. 6C is a vertical cross-sectional view taken along the line aa of FIG. 6A when the locking mechanism is in the locked state. 7 (a) is a front view of the base structure 2 when the outside lever 14 is rotated in the release direction with the main movable element attached to the base structure 2, and FIG. 7 (b) is a front view of the base structure 2. A vertical sectional view taken along the line aa of FIG. 7A when the locking mechanism is in the unlocked state, FIG. 7C is a line aaa of FIG. 7A when the locking mechanism is in the locked state. It is a vertical sectional view.

As shown in FIG. 6A, the outside lever 14 is pivotally supported by a pivot axis 13 facing in the front-rear direction, and is urged clockwise by the urging force of the spring 22 to be provided on the casing 7 (not shown). By abutting on the stopper portion of the above, the casing is always held in the standby position shown in FIG. 6A.

The vehicle outer connecting portion 14a provided at the vehicle outer end of the outside lever 14 is connected to the outside handle OH via a vertical operating force transmitting member 23 (see FIG. 3). As a result, the opening operation of the outside handle OH is transmitted to the vehicle outer connecting portion 14a of the outside lever 14 via the operating force transmitting member 23. The outside lever 14 rotates by a predetermined angle from the standby position shown in FIG. 6A to the release direction (counterclockwise direction in FIG. 6) against the urging force of the spring 22 to the operating position shown in FIG. Move.

The vehicle inside connecting portion 14b provided at the vehicle inside end of the outside lever 14 is connected to the connecting hole 17a provided at the bottom of the open link 17. As a result, the rotation of the outside lever 14 in the release direction is converted into a linear motion in the vertical direction and transmitted to the open link 17.

As shown in FIG. 5, the inside lever 19 is pivotally supported on the inner surface of the casing 7 by a pivot 33 facing the inside and outside of the vehicle, and a connecting portion 19a provided at the lower end thereof is via an operating force transmission member (not shown). By being connected to the inside handle IH, the inside handle IH rotates clockwise from the standby position shown in FIG. 5 around the pivot 33 in conjunction with the opening operation of the inside handle IH. The clockwise rotation of the inside lever 19 is transmitted to the outside lever 14 by abutting the tip of the arm portion 19b of the inside lever 19 from below on the bent portion 14c formed on the outside lever 14. .. As a result, the outside lever 14 rotates in the release direction in conjunction with the opening operation of the inside handle IH.

As shown in FIG. 5, the lock lever 18 is pivotally supported on the inner side surface of the casing 7 by a pivot shaft 24 facing the inside and outside of the vehicle, and the connecting portion 18b provided at the lower end of the arm extending diagonally forward and downward is an operating force. The tips of the two arm portions 18c and 18c, which are connected to the lock knob KN via the transmission member 34 and extend diagonally upward and forward, can come into contact with the protruding portion 31a of the rotating drive gear 31 and diagonally downward and backward. The connecting protrusion 18d provided on the arm extending to the second key lever 21 is connected to the elongated hole 21a of the second key lever 21. As a result, the lock lever 18 is rotated by a predetermined angle in the counterclockwise direction from the unlock position shown in FIG. 5 by the manual locking / unlocking operation of the lock knob KN and the key cylinder K and the rotation of the drive gear 31 driven by the motor 30. Move to the lock position and vice versa. The unlocked position and the locked position of the lock lever 18 are elastically held by the urging force of the spring 25 supported on the inner surface of the casing 7.

A protrusion 18a projecting toward the inside of the vehicle is provided on the upper portion of the lock lever 18. The protrusion 18a is connected to the elongated hole 17b provided in the open link 17 so as to be relatively slidable in the vertical direction and abuttable in the front-rear direction.

In the open link 17, the connecting hole 17a provided at the lower part is oscillatedly connected to the vehicle inner connecting portion 14b of the outside lever 14 in the front-rear direction, and the elongated hole 17b facing in the vertical direction is the protrusion of the lock lever 18. It is connected to 18a so as to be slidable in the vertical direction and abuttable in the front-rear direction.

As shown in FIG. 6B, the open link 17 faces the rotating end portion 16a of the open lever 16 from below when in the unlocked position, and is locked as shown in FIG. 6C. A release portion 17c that is displaced to a position that does not face the rotating end portion 16a when in a position, and a protrusion that is in the vicinity of the lower side of the release portion 17c and projects rearward, that is, in a mountain shape toward the unlocking direction of the open link 17. A portion 17d is provided.

When the lock lever 18 is rotated from the unlocked position to the locked position, the protrusion 18a of the lock lever 18 comes into contact with the inner edge of the elongated hole 17b of the open link 17, so that the open link 17 is out. The outside lever 14 and the inertial lever 15 around the vehicle inner connecting portion 17a of the side lever 14 rotate around the rotation axis in a direction orthogonal to the rotation axis direction, and unlock as shown in FIG. 6 (b). It moves from the position to the lock position shown in FIG. 6 (c). Further, when the lock lever 18 is rotated from the locked position to the unlocked position, the protrusion 18a of the lock lever 18 comes into contact with the outer edge of the elongated hole 17b of the open link 17, so that the open lever 17 is released. , The outside lever 14 is rotated around the vehicle inner connecting portion 17a to move from the locked position shown in FIG. 6 (c) to the unlocked position shown in FIG. 6 (b).

When the outside lever 14 rotates from the standby position to the release direction when the open link 17 is in the unlocked position and the lock mechanism is in the unlocked state, the open link 17 is shown in FIG. 6 (b). The release portion 17c of the open link 17 finally comes into contact with the rotating end portion 16a of the open lever 16 from below as shown in FIG. 7 (b) by going straight upward from the unlocked position. As shown in a), the open lever 16 and the ratchet 11 that rotates integrally with the open lever 16 are rotated in the release direction. As a result, the engagement relationship between the ratchet 11 and the latch 9 is released, and the door D can be opened.

When the open link 17 is in the locked position and the lock mechanism is in the locked state, when the outside lever 14 rotates in the release direction, the open link 17 is slanted forward from the lock position shown in FIG. 6 (c). Even if it moves upward and finally moves as shown in FIG. 7 (c), the release portion 17c of the open link 17 swings with respect to the rotating end portion 16a of the open lever 16 and thus opens. The lever 16 and ratchet 11 cannot be rotated in the release direction. Therefore, when the lock mechanism is in the locked state, the engagement relationship between the ratchet 11 and the latch 9 is maintained, and the door D cannot be opened.

The inertial lever 15 is pivotally supported by a pivot shaft 13 coaxial with the outside lever 14 so as to be rotatable around the pivot shaft 13 by a predetermined angle independently of the outside lever 14, and extends from the center of rotation toward the inside of the vehicle. It has a first arm portion 15a to be projected and a second arm portion 15b having a counter weight 15e provided at a tip portion extending upward, and has a substantially L-shape when viewed from the front.

Further, the inertial lever 15 is urged clockwise in FIG. 6A by the urging force of the spring 26 and comes into contact with the stopper piece 6a provided on the back plate 6, so that the inertial lever 15 is always in contact with FIG. 6A. When it is held in the standby position shown and an inertial force exceeding the set value acts in the outward direction (direction from the inside of the vehicle to the outside of the vehicle), the counterweight 15e exerts an urging force of the spring 26 from the standby position. It can rotate to the block position shown in FIG. 8A, which is rotated counterclockwise by a predetermined angle, and when it is in the block position, the outside handle OH is opened by executing the opening operation. , It is possible to rotate to the release position shown in FIG. 9A, which is further rotated counterclockwise from the block position.

The standby position of the inertial lever 15 is a position that does not block the movement of the open link 17 from the locked position to the unlocked position and vice versa. Similarly, the block position is a position that prevents the open link 17 from moving from the locked position to the unlocked position and a position that prevents the inertial lever 15 from returning to the standby position. Similarly, the release position is a position that enables the inertial lever 15 to return to the standby position by disengaging the engagement with the open link 17.

The first arm portion 15a extends inward of the vehicle so as to enter between the front surface of the base structure 2 and the open link 17, and a slope portion 15c and an engaging recess 15d are provided at the tip portion facing the vehicle interior direction. Be done. The slope portion 15c and the engagement recess 15d do not block the movement of the open link 17 from the locked position to the unlocked position and vice versa when the inertial lever 15 is in the standby position (FIG. 6). As shown in b), it is located below the protrusion 17d of the open link 17 and is in a position of retreating outside the movement locus of the protrusion 17d.

When the inertial lever 15 moves from the standby position to the block position, the slope portion 15c abuts on the protrusion 17d of the open link 17 at the unlocked position from below as shown in FIG. 8 (b). Forcibly moves the open link 17 from the unlocked position to the locked position. Preferably, in the slope portion 15c, the surface in contact with the protrusion portion 17d is inclined rearwardly and diagonally upward. By doing so, when the slope portion 15c comes into contact with the protrusion portion 17d, the open link 17 can be smoothly rotated to the locked position.

As shown in FIGS. 8A and 8C, the engaging recess 15d is within the movement locus of the protrusion 17d of the open link 17 moved to the lock position when the inertial lever 15 is rotated to the block position. By entering into, the movement of the open link 17 from the locked position to the unlocked position is prevented, and by engaging with the tip of the protrusion 17d from above, the inertial lever 15 due to the urging force of the spring 26 Prevents the return from the block position to the standby position. Preferably, as shown in FIG. 8 (d), the engaging recess 15d is recessed rearward from the reference surface (front surface) of the first arm portion 15a, has an opening below, and has an open link 17 at the top. A stepped portion 15f that can be engaged from above is provided at the tip end portion of the protruding portion 17d. Further, as shown in FIGS. 9A and 9B, when the inertial lever 15 is rotated to the release position, the engaging recess 15d is displaced outside the upward movement locus of the protrusion 17d. By detaching from the protrusion 17d, the inertial lever 15 can be returned to the standby position and rotated.

Next, with reference to FIGS. 6, 8 and 9, the operation of the automobile door latch device 1 according to the present embodiment, particularly the case where an impact acts on the automobile door latch device 1 due to a side collision or the like will be described.

In the normal state, as shown in FIG. 6A, the inertial lever 15 is held in the standby position by the urging force of the spring 26. When the inertial lever 15 is in the standby position, as shown in FIGS. 6 (b) and 6 (c), the slope portion 15c and the engaging recess 15d are retracted outside the movement locus of the protrusion 17d of the open link 17. Therefore, the position does not block the movement of the open link 17 from the unlocked position to the locked position and vice versa.

For example, as shown in FIG. 6B, it is assumed that the open link 17 is in the unlocked position and a side collision accident or the like occurs while the vehicle is running or the vehicle is stopped. In this case, since the impact F1 first acts on the door D on the side affected by the collision from the outside of the vehicle toward the inside of the vehicle, the inertial force in the outward direction is first applied to the door latch device 1 for the vehicle. It works.

When an inertial force in the outward direction acts on the door latch device 1 for an automobile, the inertial lever 15 is in a standby position centered on the pivot 13 against the urging force of the spring 26 by the counter weight 15e provided at the upper end portion. Rotates counterclockwise (block direction).

When the inertial lever 15 rotates counterclockwise, the first arm portion 15a is displaced upward. Therefore, as shown in FIG. 8B, the slope portion 15c of the first arm portion 15a first protrudes from the open link 17. It moves upward while abutting on the portion 17d from below. As a result, the open link 17 in the unlocked position is forcibly rotated in the locking direction (clockwise direction) around the vehicle inner connecting portion 14b of the outside lever 14.

Further, the rotation of the inertial lever 15 in the counterclockwise direction progresses, and when the first arm portion 15a moves further upward, as shown in FIG. 8 (c), finally, the protrusion 17d of the open link 17 The tip portion engages with the engaging recess 15d of the first arm portion 15a. This prevents the open link 17 that has been forcibly moved from the unlocked position to the locked position to move to the unlocked position. Further, by engaging the stepped portion 15f of the engaging recess 15d with the tip of the protruding portion 17d of the open link 17 from above, the return of the inertial lever 15 from the block position to the standby position is prevented.

Subsequently, when the airbag installed in the vehicle interior is activated by the impact of the side collision, the impact toward the outside of the vehicle acts on the door D on the side of the collision. An inertial force in the vehicle interior direction, that is, a force for returning to the standby position acts on the lever 15. However, in the embodiment, the stepped portion 15f of the engaging recess 15d of the inertial lever 15 engages with the protruding portion 17d of the open link 17 from above, and the inertial lever 15 is prevented from returning to the standby position. Even if the direction of the inertial force acting on the inertial lever 15 is reversed, the inertial lever 15 does not return to the standby position. Therefore, even if a force acts on the open link 17 and the lock lever 18 forced to move to the lock position in any direction, the lock position of the open link 17 and the lock lever 18 is maintained, so that the door D can be used. The closed state can be reliably maintained.

The engagement between the inertial lever 15 rotated to the block position and the open link 17 forced to move to the lock position releases the outside lever 14 from the standby position by opening the outside handle OH or the inside handle IH. It is released by rotating in the direction.
That is, as shown in FIGS. 8A and 8C, the outside lever 15 moves from the standby position to the release direction in a state where the protrusion 17d of the open link 17 is engaged with the engagement recess 15d of the inertial lever 15. By rotating the open link 17, the tip of the protrusion 17d engages with the engagement recess 15d from below, and the inertial lever 15 is further rotated counterclockwise from the block position while being slanted forward from the lock position. Move upwards. Then, the open link 17 moves diagonally upward and forward by a predetermined distance, and as shown in FIG. 9A, the engaging recess 15d is displaced to the outside of the vehicle from the protrusion 17d as the inertial lever 15 rotates. Then, the protrusion 17d is displaced out of the upward movement locus, or as shown in FIG. 9B, the protrusion 17d engages with the open link 17 as it moves diagonally forward and upward. By removing from the recess 15, the inertial lever 15 can be returned to the standby position. As a result, the inertial lever 15 returns to the standby position by the urging force of the spring 26, and allows the open link 17 and the lock lever 18 to move to the unlocked position.

After that, the inside handle IH and the outside handle OH are opened by switching the lock mechanism from the locked state to the unlocked state by operating the key cylinder K, the lock knob KN, or driving the motor 30 as in the normal operation. Then the door D can be opened.

1 Automotive door latch device 2 Base structure 2a Striker entry groove 3 Mating mechanism 4 Body 5 Cover plate 6 Back plate 6a Stopper piece 7 Casing 8 Latch shaft 9 Latch 9a Mating groove 10 Ratchet shaft 11 Ratchet 12 Spring 13 Pivot 14 Outside lever 14a Vehicle outer connection part 14b Vehicle inner connection part 14c Bent part 15 Inertial lever 15a First arm part 15b Second arm part 15c Slope part 15d Engagement recess 15e Counter weight 15f Step part 16 Open lever 16a Rotating end part 17 Open Link 17a Connecting hole 17b Long hole 17c Release part 17d Protrusion 18 Lock lever 18a Protrusion 18b Connecting part 18c Arm part 18d Connecting protrusion 19 Inside lever 19a Connecting part 9b Arm part 20 1st key lever 21 2nd key lever 21a Long hole 22 Spring 23 Operating force transmission member 24 Pilot 25 Spring 26 Spring 30 Motor 31 Drive gear 31a Protrusion 32 Pilot 33 Pilot 34 Operating force transmission member D Door IH Inside handle (door handle)
K Key Cylinder KN Lock Knob OH Outside Handle (Door Handle) S Striker

Claims (5)

A meshing mechanism that can hold the door in the closed position by meshing with the striker on the vehicle body side,
An outside lever that can rotate in the release direction in conjunction with the opening operation of the door handle placed on the door,
An open link that can swing to an unlock position that can release the engagement of the meshing mechanism and a lock position that cannot be released based on the rotation of the outside lever in the release direction,
When an inertial force exceeding the set value is applied, it is equipped with a rotatable inertial lever against the urging force of the spring.
When the open link is in the unlock position and the inertial lever moves from the standby position to the block position.
By abutting on the open link, the inertial lever moves the open link from the unlocked position to the locked position, prevents the open link from moving from the locked position to the unlocked position, and at the same time, prevents the open link from moving from the locked position to the unlocked position. A door latch device for an automobile, characterized in that movement from a block position to a standby position is prevented by engaging with. The inertial lever is rotatably supported around an axis perpendicular to the swing center axis direction of the open link , and enters the movement locus of the protrusion provided on the open link at the block position. The automobile door latch device according to claim 1, further comprising an engaging recess that prevents the open link from moving from the locked position to the unlocked position by engaging with the protrusion.
The automobile door latch device according to claim 2, wherein the inertial lever is prevented from returning from the block position to the standby position by engaging the protrusion of the open link with the engaging recess. .. When the inertial lever is in the block position and the open link in the locked position moves with the rotation of the outside lever in the release direction.
The automobile door latch device according to claim 3, wherein the inertial lever returns to the standby position by the urging force of the spring when the engaging recess is disengaged from the protrusion of the open link.
The inertia lever, wherein the pivotally supported by Autosai Drever coaxially, automotive door latch device according to claim 1, wherein said the outside lever is rotatable independently ..

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