JP2014237948A - Vehicle door latch device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vehicle door latch device configured to keep a door open with comparatively simple means even if the door is deformed.SOLUTION: An immovable member 191 provided in a door includes a stopper part 34 which prevents an outside lever 21 from turning in a release direction when the outside lever 21 moves toward the inside of a vehicle.

Description

  The present invention relates to a door latch device provided in a door of an automobile, and more particularly to an automobile door latch device that maintains a closed state even when an outer panel of a door is deformed due to a side collision or the like.

  In an automobile door latch device, a base member fixed in the door, and a latch supported by the base member and engageable with a striker on the vehicle body side when the door is closed, are engaged with and disengaged from the latch. And a meshing mechanism portion comprising a ratchet for enabling or disengagement, and an operating force of an outside handle that is attached to the base member so as to be pivotable about a pivot axis that faces in the front-rear direction and is operated when the door is opened. It is generally provided with an outside lever that is transmitted via the operating force transmission member, and various lever members that are linked to the outside lever and rotate the ratchet in the release direction (the direction to release from the latch). Is.

In such a door latch device, since the outside lever is linked to the outside handle provided on the outer panel of the door via the operating force transmission member, the outside lever connected to the operating force transmission member and the lower end portion thereof. The connecting portion of the side lever protrudes from the side end portion of the base member on the vehicle outer side toward the outer panel side (vehicle outer side).
Therefore, when the outer panel is deformed to the inside of the vehicle by an impact such as a side collision, the outer panel may come into contact with the connecting portion of the outside lever or the operation force transmission member due to the deformation. If this happens, the outside lever will rotate in the release direction (the direction to open the door) and the door may open unexpectedly. Therefore, increase the distance between the outer panel and the door latch device. However, if the interval is increased, the interior space of the automobile is reduced.

  In view of the above problems, for example, Patent Document 1 discloses a door latch device that maintains a closed state and does not cause the door to open unexpectedly even if the outer panel is deformed due to a side collision or the like. .

Japanese Patent Publication No. 60-55671

In the door latch device described in Patent Document 1, when an external force accompanying the deformation of the door during a side collision or the like acts on the lever member (lift lever), the lever member reaches a position where it interferes with the protrusion via the elastic member. Displacement prevents the lever member from rotating in the unlocking direction and keeps the door closed. However, the following problems may occur.
That is, since the central portion of the lever member in the longitudinal direction is elastically supported by the headed shaft and the elastic member (compression coil spring) fitted thereto, the deterioration of the elastic member over time, the elastic member and the shaft head There is a risk that the support force of the lever member may be reduced due to sliding wear. When this happens, the lever member may wobble in the thickness direction with the center portion as a fulcrum when rotating due to vibration or the like, and the extended end portion of the lever member may be separated from the end portion of the ratchet operated by the rotation. There remains a problem in the reliability of the door latch device.

  In view of the problems of the above-described conventional door latch device, the present invention is a highly reliable vehicle that can maintain a closed door state even when the door is deformed by relatively simple means. An object of the present invention is to provide a door latch device.

According to the present invention, the above problem is solved as follows.
According to a first aspect of the present invention, there is provided a meshing mechanism portion that is supported by a stationary member fixed in the door and engageable with a striker on the vehicle body side, is pivotally supported by the stationary member with a pivot, and is provided on an outer panel of the door. An outside lever linked to the outside handle via an operating force transmission member, and the outside lever rotates in a release direction from a standby position based on the operation of the outside handle, thereby In the automotive door latch device in which the engagement between the meshing mechanism portion and the striker is released via a release member linked to the lever, the outside lever rotates in the release direction from the standby position. In addition to being possible, it can move from the standby position in the vehicle direction against the urging force of the urging means, The dynamic member, said outside lever is when moving the vehicle direction, characterized in that a blocking capable stopper portion the rotation of the release direction of the outside lever.

  In a second aspect based on the first aspect, the stationary member includes a body that supports the meshing mechanism, a base member to which the body is fixed, and a metal plate member that is fixed to the body. The stopper portion is an engagement portion that is provided on the body, the base member, or the plate member, and faces the inside / outside direction in which the outside of the vehicle opens, and the outside lever is connected to the engagement portion. When moving inward, the protrusion provided on the outside lever enters and engages.

  In a third aspect based on the first aspect, the stationary member includes a body that supports the meshing mechanism, a base member to which the body is fixed, and a metal plate member that is fixed to the body. The outside lever, the body, the base member, or the plate member, and a projection that is slidably fitted to the other, and the outside lever is a vehicle. When the inside lever is moved inward, the outside lever is in a standby state by engaging the engagement hole facing the vehicle inside / outside direction capable of preventing the rotation of the outside lever in the release direction and the projection so as to be slidable. An arcuate guide hole centering on the pivot that allows rotation in the release direction from the position is provided so that one end of each other is continuous, and the engagement hole is formed in the stop. Characterized in that the parts.

  In a fourth aspect based on the first aspect, the stationary member includes a body that supports the meshing mechanism, a base member to which the body is fixed, and a metal plate member that is fixed to the body. The body, the base member, or the plate member is provided with a facing portion facing a side end on the vehicle inner side of the outside lever, and the outside lever moves to the vehicle inner side when the outside lever moves to the vehicle inner side. An engagement hole is provided in which the end of the lever inside the vehicle enters and engages, and this engagement hole is used as the stopper.

  According to the present invention, the non-movable member fixed in the door is simply provided with a stopper portion that can prevent the rotation of the outside lever in the release direction when the outside lever moves in the vehicle interior direction. Since the outside lever can be prevented from rotating in the release direction when the door is deformed inside the vehicle, a highly reliable door latch device can be provided.

It is a right view of the front half part of a motor vehicle provided with the door latch apparatus which concerns on the 1st Embodiment of this invention. Similarly, it is the front view which looked at the door latch device from the back of the body. Similarly, it is an exploded perspective view of a door latch device. It is the IV-IV line expanded horizontal sectional view in FIG. It is an enlarged view of the principal part explaining the movement of the outside lever at the time of a side collision. It is a perspective view of the principal part of an outside lever and a pack plate in a door latch device concerning a 2nd embodiment of the present invention. Similarly, it is an expanded cross-sectional view of the same portion as FIG. 4 of the door latch device according to the third embodiment. Similarly, it is an expanded cross-sectional view of the same portion as FIG. 4 of the door latch device according to the fourth embodiment. It is an enlarged view of the principal part which shows the modification of the means to urge the outside lever to a standby position. Similarly, it is an enlarged view of the principal part when an outside lever moves to the vehicle inside.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
1 to 5 show a door latch device according to a first embodiment of the present invention. In the following description, the left side in FIGS. 2 and 3 is the “vehicle inside” of the automobile, and the right side is the “vehicle outside”. Further, the door latch device of the present invention is attached to the inside of the rear end portion of the left and right front side doors (hereinafter abbreviated as doors) in an automobile, but in this embodiment, as shown in FIG. An example in which the door latch device 1 is attached to the right door 2 will be described.

  The door 2 includes an outer panel 2a and an inner panel (not shown), and an outer handle 4 for opening the door latch device 1 from the outside of the vehicle via an operating force transmission member 3 on the outer surface of the rear upper portion of the outer panel 2a. And a key cylinder 6 for unlocking and locking the door latch device 1 from the outside of the vehicle via the operating force transmission member 5. An inner handle 8 for opening the door latch device 1 from the inside of the vehicle via the operation force transmission member 7 and an operation force transmission member 9 on the inner side surface of the front side of the inner panel from the inside of the vehicle. A lock knob 10 for unlocking and locking is provided.

  As shown in FIGS. 2 and 3, the door latch device 1 operates the meshing part assembly 11 to engage the meshing part assembly 11 for holding the door 2 in a closed state by engaging the striker S on the vehicle body side. It is comprised by assembling | attaching to the operation part assembly 12 for this, and the meshing part assembly 11 and the operation part assembly 12 are integrated.

  The engagement portion assembly 11 is pivotally supported by a synthetic resin body 13 fixed to the rear end portion in the door 2 and a latch shaft 14 in the front-rear direction in the body 13 and can be engaged with a striker S on the vehicle body side. A latch 15, a ratchet 17 that is pivotally supported in the body 13 by a ratchet shaft 16 in the front-rear direction and engageable with the latch 15, and a back side of the body 13 (a front side when the door latch device 1 is attached to the door 2). A ratchet pin 171 provided integrally with the ratchet 17 and a metal cover plate as a plate member that closes the front side of the body 13 (the rear side when the door latch device 1 is attached to the door 2). 18 and a metal back plate 19 as a plate member fixed to the back side of the body 13. Note that the back plate 19 may be omitted.

  When the door 2 is closed, the striker S on the vehicle body side enters the striker entry groove 181 provided substantially at the center in the vertical direction of the body 13 and the cover plate 18 and engages with the latch 15, and the ratchet 17 is latched. The door 2 is held in a closed state by engaging with 15 and preventing the latch 15 from rotating in the opening direction (clockwise in FIGS. 2 and 3).

  The operation section assembly 12 is fixed to the back side of the body 13 via a back plate 19 and is made of a synthetic resin casing 20 as a base member, various operation levers assembled in the casing 20, a linkage lever, and a motor (not shown). ) Etc.

  The various operation levers assembled in the casing 20 include the outside handle 21 connected to the above-described outside handle 4 via the operation force transmission member 3 and facing the inside / outside of the vehicle, and the inside handle 8 of the door 2 described above. An inside lever (not shown) linked via the operating force transmission member 7 and linked to the operation of the inside handle 8, and a locking linked to the lock knob 10 described above via the operating force transmission member 9 and linked to the operation of the lock knob 10. There are a lever (not shown), a key lever (not shown) linked to the key cylinder 6 described above via the operating force transmission member 5 and interlocked with the operation of the key cylinder 6.

  The linkage lever is connected to the inner end 210 of the outside lever 21 and has a release lever 22 as a release member that can move to the unlock position and the lock position in conjunction with the operation of the locking lever. . When the release lever 22 is in the unlocked position, the release lever 22 moves upward in conjunction with the release operation of the outside lever 21 accompanying the opening operation of the outside handle 4 (operation that rotates clockwise by a predetermined angle in FIG. 2). Thus, the release operation of the outside lever 21 can be transmitted to the ratchet 17, and the ratchet 17 is rotated in the releasing direction so as to be released from the latch 15, thereby enabling the door 2 to be opened. The various levers such as the inside lever, the locking lever, the key lever, and the release lever 22 are known ones that are mounted on a normal door latch device. Omitted.

  The casing 20 includes a first casing 201 fixed to the back side of the meshing part assembly 11 via the back plate 19 on the back side of the body 13 in a state where the meshing part assembly 11 and the operation part assembly 12 are integrated. And the second casing 202 facing forward perpendicular to the first casing 201, and the various levers described above other than the outside lever 21 are assembled in the second casing 202. The first casing 201 includes a base 201a facing the body 13, an upper side wall 201b protruding rearwardly from the outer peripheral edge of the upper half of the base 201a so as to surround the outer peripheral surface of the upper half of the body 13, and a base It has a lower side wall 201c that protrudes rearward from the outer peripheral edge of the lower half of 201a and has a smaller protruding dimension than the upper side wall 201b.

In order to firmly integrate the meshing part assembly 11 and the operation part assembly 12, the upper part and the lower part of the casing 20 are fastened to the back plate 19 with bolts 23 and 24 facing rearward. As shown in FIG. 4, the lower bolt 24 protrudes integrally from the rear surface of the base 201 a of the first casing 201, and is centered on the pivot 25 that faces in the front-rear direction for pivotally supporting the outside lever 21. And is screwed into the female screw hole 26 of the lower end portion 191 that protrudes downward from the engagement portion assembly 11 in the back plate 19.
Note that the latch 15 and the ratchet 17 in the present embodiment constitute a meshing mechanism portion according to the present invention, and the body 13 or the casing 20 corresponds to a base member according to the present invention, and the body 13, the casing 20, and the cover The plate 18 and / or the back plate 19 correspond to a stationary member according to the present invention.

  As shown in FIGS. 3 and 4, a vertically long rectangular hole 27 penetrating the base 201a is formed at the outer end of the portion of the base 201a facing the pivot 25. In addition, a notch 28 that is continuous with the rectangular hole 27 is formed at the base end of the lower side wall 201c that faces the pivot 25. Thereby, the part which opposes the pivot 25 in the lower side wall 201c is made into the weak part 201d whose front-back dimension is shorter than another part and becomes discontinuous with the base part 201a.

  As shown in FIGS. 3 to 5, a long hole 29 that faces the inside and outside of the vehicle is formed in an intermediate portion of the outside lever 21 that is closer to the inside of the vehicle. It is fitted so that it can move relative to the direction. After the elongated hole 29 of the outside lever 21 is fitted to the pivot 25, the lower end 191 of the back plate 19 is fixed to the rear surface of the pivot 25 with a bolt 24. In this embodiment, the length of the long hole 29 in the longitudinal direction is approximately twice the diameter of the pivot 25, but the length is appropriately set. The outer end of the outside lever 21 that protrudes from the lower side wall 201c is bent in a L shape in plan view toward the front side, that is, the lower side wall 201c, and the inner side surface of the bent portion 212 on the inner side of the vehicle is The lower side wall 201c is close to the outer surface of the fragile portion 201d.

  A connecting portion 213 having a through hole (not shown) in the vertical direction is integrally bent rearwardly at an outer end portion of the outside lever 21 (an end portion facing the outer panel 2a). A synthetic resin receiving member 30 is press-fitted into the through-hole 213. The connecting portion 213 has an upper end linked to the outside handle 4, and a crank-like fold at the lower end of the operating force transmission member 3 formed of a rod that can transmit the operating force of the outside handle 4 to the outside lever 21. The part 3 a is connected from above via the receiving member 30.

On the upper edge of the outside lever 21 that is close to the outer end portion of the long hole 29, there is an upper locking piece 214 having an inverted L shape in side view with which one foot piece 311 of a torsion coil spring 31 to be described later contacts. It protrudes upward. Further, a lower locking piece 215 for locking the other foot piece 312 of the torsion coil spring 31 projects downward from the lower edge of the outside lever 21 adjacent to the inner end of the long hole 29. ing.
Further, on the outer side of the long hole 29 and the lower end portion 191 of the back plate 19, on the rear surface of the outside lever 21, the protrusion 216 faces the inside and outside of the vehicle and is aligned on the line of the substantially central portion above and below the long hole 29. However, a part of the outside lever 21 is cut and raised to project rearward. The protrusion 216 can be formed by pressing the front side of the outside lever 21 with a press or the like to bulge backward, or by welding another member.

  Between the base portion 201a of the first casing 201 and the opposing surface of the outside lever 21, a torsion coil spring 31 is loosely fitted on the pivot 25, and one foot piece 311 extending upward in the torsion coil spring 31 is 3 is locked from the left side in FIG. 3 to the locking protrusion 32 protruding from the rear surface of 201a. Similarly, the other leg piece 312 is in a state where an elastic force is applied to the lower locking piece 215 of the outside lever 21. It is locked from the left side of FIG. As a result, the outside lever 21 is biased counterclockwise about the pivot 25 in FIGS. 1 and 5.

  As shown in FIGS. 1 and 5, the one foot piece 311 facing the upper side of the torsion coil spring 31 has a biasing means for holding the outside lever 21 in the standby position by biasing the outside lever 21 to the outside of the vehicle. It is composed. That is, the outside lever 21 is configured so that the outside lever 21 is brought into contact with the one foot piece 311 of the torsion coil spring 31 by bringing the side end of the front engagement piece 214a of the upper engagement piece 214 into contact with the one foot piece 311. The urging force of the spring 31 is always urged to the outside of the vehicle. At this time, as the pivot shaft 25 abuts against the inner edge of the long hole 29, the outside lever 212 protrudes to the outside as much as possible and is held in a normal door closed state, that is, in a standby position.

  The outer side of the lower locking piece 215 of the outside lever 21 is in contact with the rear surface of the base 201a of the first casing 201 below the pivot 25, so that the outside lever 21 is placed in the standby position (see FIGS. 2 and 4). A stopper 33 that stops at a position shown in FIG. When the outside lever 21 is in the standby position, the protruding portion 216 protruding from the outside lever 21 is slightly separated from the outer surface of the lower end portion 191 of the back plate 19 to the vehicle outer side.

  As shown in FIGS. 2 and 4, the side end portion on the vehicle outer side at the lower end portion 191 of the back plate 19 that is the rotation region of the outside lever 21 faces the vehicle interior / exterior direction, and is located in the vehicle exterior and front / rear direction. A slit-like engaging portion 34 that opens is provided so as to face the protruding portion 216 of the outside lever 21. The vertical groove width of the engaging portion 34 is slightly larger than the vertical dimension of the protruding portion 216, and when the outside lever 21 moves relative to the pivot 25 toward the inside of the vehicle, the protruding portion 216 is engaged. It can enter into and engage with the groove 34. In addition, it is good also as an engagement groove | channel where the front surface is dented toward the back, without making the engagement part 34 into a slit-shaped thing. The engaging portion 34 provided at the lower end portion 191 of the back plate 19 corresponds to the stopper portion according to the present invention.

Next, the operation of the door latch device 1 according to the first embodiment, particularly the movement of the outside lever 21 at the time of a side collision or the like will be described.
FIG. 2 shows a normal state (door closed state) of the door latch device 1. When the outside handle 4 is opened, and the operating force transmission member 3 linked thereto moves downward, the outside lever 21 is Against the biasing force of the torsion coil spring 31, it rotates by a predetermined angle in the release direction (clockwise in FIG. 2) from the standby position (door closing position) to the operation position (door opening position).

  As a result, when the lock knob 10 is in the unlocked state and the locking lever and the release lever 22 are in the unlocked position, the release lever 22 linked to the inner end 210 of the outside lever 21 moves upward and the ratchet By abutting the pin 171 from below, the engagement between the ratchet 17 and the latch 15 can be released and the door 2 can be opened. In the normal state shown in FIG. 2, as described above, the outside lever 21 is constantly pressed outward by the urging force of the foot 311 facing upward of the torsion coil spring 31. There is no risk of moving to.

As shown in FIG. 5, when the door 2 is closed, the outer panel 2a of the door 2 is deformed inside the vehicle due to a side collision or the like, and a collision load is applied to the outside lever 21 of the door latch device 1. Moves against the urging force of the torsion coil spring 31 relative to the pivot shaft 25, and stops when the pivot shaft 25 moves relative to a position where it abuts against the outer edge of the long hole 29.
Simultaneously with this movement, the protrusion 216 of the outside lever 21 that has been in the disengaged state so far enters the engagement portion 34 of the lower end 191 of the back plate 19 and engages. Thereby, the rotation of the outside lever 21 around the pivot 25 is prevented. As a result, even if the outer panel 2a is further deformed in the direction in which the outside lever 21 is rotated downward, the outside lever 21 is not rotated in the release direction (clockwise in FIG. 5), and the door 2 is Unexpected opening can be prevented.

  When a collision load is applied to the outside lever 21, the bent portion 212 comes into contact with the lower side wall 201c of the first casing 201. However, the portion of the lower side wall 201c that faces the pivot 25 has a fragile portion. Since 201d is provided, when a strong collision load is applied to the outside lever 21, the bent portion 212 can be moved inward while deforming the weak portion 201d inward. When the collision load applied to the outside lever 21 is relatively small and the fragile portion 201d is not deformed, the outside lever 21 does not move to the inside of the vehicle, so that the door latch device 1 is maintained in a normal door closing state. The As described above, when the fragile portion 201d is deformed to the vehicle inner side at the time of a side collision, the bent portion 212 of the outside lever 21 enters the rectangular hole 27 provided in the first casing 201. 27 can also prevent the outside lever 21 from rotating in the release direction.

  Further, when the outer panel 2 a once deformed is restored to the outside of the vehicle and is separated from the outside lever 21, the outside lever 21 is moved to the outside of the vehicle by the urging force of the torsion coil spring 31 to engage with the protrusion 216. Since the engagement state with the joint portion 34 is released, the door latch device 1 returns to the normal door closing state.

  Although illustration is omitted, the engaging portion 34 as described above is provided at the side end portion on the vehicle outer side of the base portion 201a of the first casing 201, which is the rotation region of the outside lever 21, and the outside lever 21 is also provided. When the projecting part 216 as described above is provided on the front surface of the motor and the outside lever 21 moves to the inside of the vehicle, the projecting part 216 enters the engaging part 34 and rotates the outside lever 21 in the release direction. It is possible to prevent movement. At this time, the base 201a may be shaped without the lower side wall 201c or the rectangular hole 27.

FIG. 6 is a perspective view of a main part of a door latch device according to the second embodiment of the present invention. In addition, the same code | symbol is attached | subjected to the member similar to the said 1st Embodiment, and the detailed description is abbreviate | omitted.
In the door latch device according to the second embodiment, the engaging pin 35 as a protrusion faces the same direction as the pivot 25 of the outside lever 21 on the vehicle outer side that is separated from the long hole 29 in the outside lever 21. The engagement pin 36 is slidably fitted to the portion of the back plate 19 that faces the engagement pin 35 so as to be slidable. The downward arcuate guide hole 37 is provided so that the outer end portion and the upper end portion thereof are continuous with each other. The engagement hole 36 into which the engagement pin 35 is fitted corresponds to the stopper portion according to the present invention.

  The engagement pin 35 is located at a corner where the engagement hole 36 and the guide hole 37 are continuous when the outside lever 21 is in the standby position, and when the outside lever 21 is rotated in the release direction, the engagement pin 35 is engaged. When the joint pin 35 moves downward along the guide hole 36, the door latch device 1 can be opened in a normal state.

On the other hand, when a collision load is applied to the outside lever 21, the engagement pin 35 moves in the vehicle direction along the engagement hole 36, and the movement in the vertical direction is restricted. The rotation around the pivot 25 is prevented. As a result, as in the first embodiment, the door 2 can be prevented from opening unexpectedly.
Further, since the engagement pin 35 moves along the guide hole 37 during a normal door opening operation, the outside lever 21 does not move in the inward direction against the torsion coil spring 31.

Although not shown, in the second embodiment, contrary to the above, the outside lever 21 is provided with an engagement pin 35 protruding forward on the back plate 19 side and having a large vertical dimension. On the side, an engagement hole 36 facing in and out of the vehicle and an upward arcuate guide hole 37 continuing to the front end thereof may be provided. Further, the engagement hole 36 and the guide hole 37 having the same shape as in FIG. 6 are provided on the base 201a side of the first casing 201, or the engagement hole 36 and the guide hole 37 are provided on both the back plate 19 and the base 201a. You can also. When the engaging hole 36 and the guide hole 37 are provided on the base 201a side, the engaging pin 35 may be provided so as to protrude forward, and the engaging hole 36 and the guide hole 37 are connected to the back plate 19 and the base 201a. When both are provided, the engagement pin 35 may penetrate the outside lever 21 and protrude in both the front and rear directions.
Further, when the back plate 19 is omitted, a part of the body 13 or the cover plate 18 extends downward, and the engagement hole 36 and the guide hole 37 as described above may be provided in any of them. .

  FIG. 7 shows a cross-sectional view of the door latch device according to the third embodiment of the present invention, which is crossed at the same site as in FIG. 2. In the door latch device of this third embodiment, the outside lever 21 is The inner end 210 is elongated so that it extends slightly toward the inside of the vehicle, and the opposing portion 202a of the second casing 202 that faces the inner end 210 of the outside lever 21 An engagement hole 38 that can be engaged with the end 210 is provided. As shown by a two-dot chain line in FIG. 7, when the outside lever 21 moves to the inside of the vehicle due to a side collision or the like, the inner end portion 210 enters the engagement hole 38 of the second casing 202, thereby The lever 21 is prevented from rotating in the release direction. The engaging hole 38 provided in the second casing 202 corresponds to the stopper portion according to the present invention.

FIG. 8 shows a cross-sectional view of the door latch device according to the fourth embodiment of the present invention, which is crossed at the same site as in FIG. 2. In the door latch device of the fourth embodiment, the back plate 19 is In addition to bending forward and extending inward of the vehicle so as not to interfere with the release lever 22, a rearward facing piece 192 facing the inner end portion 210 of the outside lever 21 is integrally provided continuously. Further, an engagement hole 39 is provided in which the inner end portion 210 of the outside lever 21 enters and can be engaged. As shown by a two-dot chain line in FIG. 8, when the outside lever 21 moves to the inside of the vehicle due to a side collision or the like, the inner end portion 210 enters the engagement hole 39 of the engagement piece 192, thereby The lever 21 is prevented from rotating in the release direction. The engaging hole 39 provided in the facing piece 192 corresponds to the stopper portion according to the present invention.
The facing portion 202a or the facing piece 192 as in the third and fourth embodiments may be provided on either the body 13 or the cover plate 18.

  As described above, in the door latch devices according to the first to fourth embodiments, the door 2 can be mounted on the vehicle only by providing a relatively simple stopper portion on the back plate 19 or the first casing 201. Since the outside lever 21 can be prevented from rotating in the release direction when deformed inward, the reliability of the door latch device is enhanced.

While the present invention has been described with respect to the above embodiments, the following modifications and changes can be made to the present embodiment without departing from the scope of the present invention.
In the door latch device according to the first embodiment, the engaging portion 34 is provided on the back plate 19, but when the back plate 19 is omitted, for example, as shown by a two-dot chain line in FIG. 13 and a part of the vehicle outer side of the cover plate 18 may be extended downward, and an engaging part 34 may be provided in the extended part. Further, either one of the body 13 and the cover plate 18 may be extended downward, and the engaging portion 34 may be provided in one of the extended portions.

  The stopper portion that prevents the outside lever 21 from rotating in the release direction is not limited to those in the above-described embodiments, and the rotation in the release direction when the outside lever 21 is in the standby position. And any shape that can prevent rotation in the release direction when the outside lever 21 moves to the inside of the vehicle, and any one that does not move with the outside lever 21. It may be provided on the stationary member.

  In the above embodiment, the foot piece 311 facing the upper side of the torsion coil spring 31 is used as the biasing means for constantly biasing the outside lever 21 to the outside of the vehicle. However, the biasing means such as a tension coil spring is separately provided. It may be provided.

Further, the outside lever 21 may be constantly urged to the standby position by means as shown in FIGS.
That is, the outside lever 21 is provided with a fitting hole 40 larger than the long hole 29 of the above embodiment, and the pivot 25 is slid and rotated on the guide member 41 made of synthetic resin press-fitted into the fitting hole 40. A long hole 42 that is movably fitted to the inside and outside of the vehicle is provided, and an elastically deformable mountain-shaped elastic holding member that protrudes in a direction approaching each other on the upper and lower opposing surfaces of the central portion of the long hole 42. The pieces 43 and 43 are integrally formed. The base portions of the both elastic holding pieces 43 are provided with lightening holes 44 and 44 so that they can be elastically deformed in a direction in which they are vertically separated from each other.

When the outside lever 21 is in the standby position shown in FIG. 9, the pivot shaft 25 is elastically held at the inner end of the long hole 42 by the both elastic holding pieces 43, and as shown in FIG. When the outside lever 21 is pushed inward by the external load, the pivot shaft 25 is elastically deformed in the direction of separating both elastic holding pieces 43 so as to be relative to the end of the long hole 42 on the vehicle outer side. Can move.
With this configuration, the outside lever 21 is always held at the standby position by the both elastic holding pieces 43, so that the door latch device can be operated smoothly and reliably in a normal state by opening the door handle 4. Can do. Further, it is possible to omit urging the outside lever 21 to the outside of the vehicle at all times by the foot 311 of the torsion coil spring 31, but of course, the urging force of the torsion coil spring 31 may be used together. It is. In addition, the shape of both elastic holding pieces 43 may be a laterally H-shaped shape in which an end on the vehicle outer side is open.

In the above embodiment, the operation force transmission member 3 is a rod-shaped member and is a door latch device that rotates the outer end portion of the outside lever 21 in the direction of pushing down. However, an operation force transmission member such as a push-pull type or a Bowden cable is used. The present invention can also be applied to a door latch device that rotates the outside lever 21 in a direction in which the outside lever 21 is pulled up.
The door may be a rear door, a slide door, or a back door of an automobile.

DESCRIPTION OF SYMBOLS 1 Door latch apparatus 2 Door 2a Outer panel 3 Operation force transmission member 3a Bending part 4 Outside handle 5 Operation force transmission member 6 Key cylinder 7 Operation force transmission member 8 Inside handle 9 Operation force transmission member 10 Lock knob 11 Engagement part assembly 12 Operation part Assembly 13 Body (Fixed member)
14 Latch shaft 15 Latch 16 Ratchet shaft 17 Ratchet 18 Cover plate (non-moving member)
19 Back plate (Fixed member)
20 Casing (base member, immovable member)
21 Outside lever 22 Release lever (release member)
23, 24 Bolt 25 Pivot 26 Female screw hole 27 Rectangular hole 28 Notch 29 Long hole 30 Receiving member 31 Torsion coil spring 32 Locking protrusion 33 Stopper 34 Engagement part 35 Engagement pin (protrusion part)
36 Engagement hole (stopper part)
37 Guide hole 38 Engagement hole (stopper part)
39 Engagement hole (stopper part)
40 fitting hole 41 guide member 42 long hole 43 elastic holding piece 44 fillet hole 171 ratchet pin 181 striker entry groove 191 lower end 192 opposed piece (opposed portion)
201 first casing 201a base 201b upper side wall 201c lower side wall 201d weak part 202 second casing 202a facing part 210 inner end 211 connecting part 212 bent part 213 connecting part 214 upper locking piece 214a forward piece 215 lower locking piece 216 Projections 311 and 312 Foot S Striker

Claims (4)

An engagement force supported by a stationary member fixed in the door and engageable with a striker on the vehicle body side, and an operating force on an outer handle that is pivotally supported by the stationary member and provided on the outer panel of the door An outside lever linked through a transmission member, and the release lever linked to the outside lever by rotating the outside lever from the standby position in the release direction based on the operation of the outside handle. In a door latch device for an automobile that releases the engagement between the meshing mechanism portion and the striker via a member,
The outside lever is movable in the in-vehicle direction from the standby position against the urging force of the urging means in addition to being rotatable in the release direction from the standby position.
A door latch device for an automobile, wherein the stationary member is provided with a stopper portion that can prevent the outside lever from rotating in the release direction when the outside lever moves in the in-vehicle direction.   The immovable member includes a body that supports the meshing mechanism portion, a base member to which the body is fixed, and a metal plate member that is fixed to the body, and the stopper portion includes the body and the base An engagement portion that is provided on the member or the plate member and faces toward the inside / outside of the vehicle and opens to the outside of the vehicle. When the outside lever moves toward the vehicle inside, the engagement portion is provided on the outside lever. 2. A door latch device for an automobile according to claim 1, wherein the protruding portion is inserted and engaged.   The stationary member includes a body that supports the meshing mechanism, a base member to which the body is fixed, and a metal plate member that is fixed to the body. The outside lever, the body, and the base A protrusion is fitted to one of the member and the plate member, and the other is slidably fitted to the other, and when the outside lever moves toward the inside of the vehicle, the release direction of the outside lever The outside lever is allowed to turn from the standby position to the release direction by fitting the protrusion with the engagement hole facing the inside / outside of the vehicle that can be prevented from turning to the inside. 2. An arcuate guide hole centered on the pivot is provided so that one end of each of the guide holes is continuous, and the engagement hole is used as the stopper portion. Mounting an automotive door latch device.   The stationary member includes a body that supports the meshing mechanism, a base member to which the body is fixed, and a metal plate member that is fixed to the body, and the body, the base member, or the plate member A facing portion facing the vehicle inner side edge of the outside lever is provided, and when the outside lever moves to the vehicle inner side, the vehicle inner end portion of the outside lever enters and engages with the facing portion. 2. The door latch device for an automobile according to claim 1, wherein an engaging hole is provided, and the engaging hole is used as the stopper portion.

Images