JPH076412Y2 - Door lock latch unlocking prevention device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a latch unlocking prevention device for a vehicle door lock.

(Prior Art) A vehicle door lock is composed of a latch attached to the door side and a striker attached to the pillar side, and the door is kept closed by the engagement of the latch and the striker. This latch is attached to the door inner panel via a reinforcement (reinforcement plate), and an outside handle provided on the outer wall of the door outer panel and an open lever provided on the latch side are linked by a link mechanism to open the door from outside the vehicle. When the door is opened, the latch is unlocked by rotating the open lever by opening the outside handle.

(Problems to be solved by the invention) However, there is a case where some external force is applied to the latch portion of the door outer panel from the outside and the door outer panel is deformed and the door inner panel is displaced relatively upward with respect to the door outer panel. is there. Specifically, for example, when an external force is applied to the door outer panel and the vehicle body leans in the direction of the external force, the door outer panel tries to maintain the current position, whereas the striker attached to the pillar side engages with the latch. Therefore, a force that pushes the door inner panel upward together with the latch acts via the striker, and the door inner panel tries to move in the shift direction in parallel with the door outer panel surface. In such a case, since the outside handle and the link mechanism are in the same state as the stationary state with respect to the upward relative displacement of the latch, the same phenomenon as when the open lever is rotated by the door opening operation of the outside handle occurs. , There is a problem that the door opens even though there is no intention of opening the door.

The present invention has been made to solve such problems, and a latch solution for a door lock intended to avoid the inconvenient situation that the door opens even if some external force is applied to the outer wall of the door outer panel. An object is to provide a lock prevention device.

(Means for Solving Problems) In order to solve the above-mentioned problems, the present invention provides a door outer panel disposed outside a vehicle door, and a door outer panel disposed opposite to the door outer panel. A door inner panel provided, a striker provided on a vehicle body side member located at the opening of the door, a latch arranged on the door inner panel side and engaged with the striker in a closed state of the door, and the door outer panel And an open lever that has an outside handle that is disposed on the door outer panel side and that rotates with the operation of the outside handle and that releases the engagement between the latch and the striker. A protrusion and a protrusion that are disposed between the door outer panel and the open lever and protrude toward the door outer panel. When the door inner panel is deformed toward the door inner panel side, the unlocking prevention member includes an end portion that presses the extension portion in a direction in which the latch and the striker are engaged with each other and engages with the open lever. A latch unlocking prevention device for a door lock is provided.

(Operation) When an external force is applied to the outer wall of the door outer panel and the door outer panel is deformed, the door outer panel abuts the unlocking prevention member, and accordingly, the unlocking prevention member is deformed and moved to the open lever side to unlock. The end of the blocking member presses the arm end (extension part) of the open lever in the direction in which the latch and the striker engage with each other and locks the open lever to prevent the open lever from rotating and unlocking the latch. To be prevented.

Embodiment An embodiment of the present invention will be described below with reference to the drawings.

1 to 4 show the construction of a latch unlocking prevention device for a door lock according to the present invention, wherein reference numeral 10 denotes a rear door, and the rear door 10 is a door outer panel 11 and a door inner panel.
12 and the peripheral edges of these panels are assembled to each other by a hemming process or the like in a housing shape. As shown in FIG. 3, the rear end portion of the door inner panel 12 is bent at a substantially right angle toward the door outer panel 11 in the vicinity of the position where the door lock 20 is attached, and the rear end portion faces the rear pillar 14 described later. It forms the wall 12a. Then, the door inner panel 12 is further bent at a substantially right angle at the side edge of the rear end wall 12a so as to be parallel to the door outer panel 11 again, and
It is spaced from the door outer panel 11 and extends toward the hemming end 12b.

On the other hand, the rear pillar 14 has a slight gap with the door inner panel 12 in the closed state, is bent along the rear end shape of the door inner panel 12, and the rear end wall of the door inner panel 12 is formed.
A striker mounting surface 14a which is parallel to and opposes the surface 12a is formed. The striker 21 of the door lock 20 is fixed to the striker mounting surface 14a.

On the inner wall surface (the side surface of the door outer panel 11) of the rear end wall 12a of the door inner panel 12, a reinforcement 13 is fixed at a position corresponding to the striker 21 by spot welding or the like. The door inner panel 12 at the mounting position is reinforced. This reinforcement 13 is formed by bending a thick plate into a substantially U-shaped cross section, and a wall surface 13a having a width substantially the same as that of the rear end wall 12a is closely adhered to the inner surface of the rear end wall 12a. The room-side edge is bent at a substantially right angle and extends along the inner wall surface of the door inner panel 12, and the wall surface 13
The edge of the door outer panel 11 side of a is bent at a substantially right angle toward the open lever 23 side described later, and the door outer panel 11
It extends along the inner wall surface of 11 in parallel with this and with a gap.

The housing 22 of the door lock 20 has a rear end wall 12 of the door inner panel 12 at a substantially central position in the vertical direction of the reinforcement 13 and a meshing position of the striker 21 via the reinforcement 13.
It is firmly fixed to a by bolts. Of the housing 22,
It is firmly fixed to the rear end wall 12a of the door inner panel with bolts or the like. Rear end wall 12a of the door inner panel of the housing 22
An open lever 23 is rotatably supported by a pin 22c on the back surface 22b on the opposite side to the open lever 23.
a is extended to the door outer panel 11 side, one end of a latch rod 24 is rotatably connected to the arm end 23a ', and the other end of the latch rod 24 is connected to the outside handle 25. A notch 22a into which the striker 21 is inserted is formed in the surface of the housing 22 that abuts the rear end wall 12a of the striker 21 side, and the same applies to the reinforcement 13 and the door inner panel 12 in alignment with the notch 22a. A shape cutout is provided.

When the door 10 is closed, the striker 21 enters through the notch 22a of the housing 22 and meshes with a latch (not shown) to keep the door 10 in the closed state. When the door 10 is opened from the outside of the vehicle, when the outside handle 25 is pulled upward, the latch rod 24 is pushed down in the direction of arrow B in FIG. 1, whereby the open lever 23 is shown by a virtual line in FIG. Rotate to position,
The latch (not shown) is released, the engagement between the latch and the striker 21 is released, and the door 10 is opened.

Although the operation of the door lock 20 is the same as the conventional one, the door lock of the present invention is provided with the latch unlocking prevention device 30. The latch unlocking prevention device 30 is provided on the wall surface 13b facing the door outer panel 11 of the reinforcement 13.
It comprises a stopper bracket (unlocking prevention member) 31 fixed to the. More specifically, the stopper bracket 31 has an upper end portion.
31a is fixed to the upper edge of the wall surface 13b of the reinforcement 13 at the same position as the open lever 23 in the front-rear direction of the vehicle body by welding or the like, and the lower part from the upper end 31a has a substantially C-shaped cross section on the door outer panel 11 side. Projection that is bent convexly toward
31c is formed, the lower end edge portion 31b thereof extends toward the open lever 23 side, and the protruding portion 31c is arranged in the gap between the reinforcement 13 and the door outer panel 11. A rectangular hole 13c, which is wider than the stopper bracket 31, is formed below the fixed position of the upper end 31a of the stopper bracket 31 on the wall surface 13b of the reinforcement 13. The stopper bracket 31 is inserted into the hole 13c. The lower end edge 31b is inserted and the lower end edge 31b is slightly projected from the reinforcement 13 toward the open lever 23 side.

Next, the operation of the latch unlocking prevention device 30 will be described. The stopper bracket 31 of the latch unlocking prevention device 30 is normally kept in its original shape as shown in FIG.
It is located in the gap between the rear and rear reinforcement 13 and has no effect on the door lock 20. However, when an external force (a force indicated by an arrow A in FIG. 5) acts on the door 10 from the side of the vehicle and the door outer panel 11 is deformed to the latch side, the stopper bracket between the door outer panel 11 and the reinforcement 13 is stopped.
31 is crushed and deformed, the lower end edge 31b projects from the hole 13c toward the open lever 23, and the lower end edge 31b abuts against the arm end 23a 'of the open lever 23 and presses it. At this time, the lower end edge 31b protrudes from the arm end 23a ′ while being positively pressed from below so that the open lever 23 rotates in the direction in which the latch and the striker are engaged, and
23 is locked when the latch and the striker are completely meshed with each other or rotated to a state close thereto. Therefore, even if the latch unlocking prevention device 30 of the door lock 20 operates in a state in which the open lever 23 does not mesh with the latch and the striker, the lower end edge 31b is pressed so that the open lever 23 is always completely latched and striker. The latch is not unlocked by returning to the state where it engages with or returning to the state close to it.

In the above-described embodiment, the stopper bracket 31 which is separate from the phosphorus reinforcement 13 is fixed to the phosphorus reinforcement 13, but as shown in FIG.
Alternatively, the stopper bracket 31 ′ having substantially the same shape as that of the stopper bracket 31 shown in FIG.

Further, the shape of the stopper bracket can be modified in various ways other than the above-mentioned embodiment, and may be reinforced by ribs or the like so as to withstand the rotation of the open lever 23.

(Effects of the Invention) As described in detail above, according to the latch unlocking prevention device for a door lock of the present invention, the unlocking prevention member is disposed between the door outer panel and the open lever, and the door outer panel is provided. By providing the protruding portion that protrudes to the side, the external force is received by the protruding portion via the door outer panel and deforms during a side collision.
Moreover, due to this deformation, the end portion of the unlocking prevention member comes into contact with the extension portion of the open lever, and the open lever is pressed and rotated in the direction in which the latch and the striker are engaged with each other to lock and open the open lever. It is possible to prevent the rotation of the lever, thereby reliably preventing the unlocking of the latch, and avoiding the inconvenience that the door opens even when there is no intention of opening the door. Play.

[Brief description of drawings]

FIG. 1 shows an embodiment of the present invention. FIG. 1 is a partial cutaway sectional view of a latch unlocking prevention device for a door lock according to the present invention, FIG. 2 is a side view of a rear door, and FIG. Arrow line in Figure 2
Fig. 4 is a sectional view taken along line III-III, Fig. 4 is an enlarged perspective view of the stopper bracket (unlocking prevention member) 31 shown in Figs. 1 and 2, and Fig. 5 is a case in which an external force is applied to the door outer panel and it is deformed. Operation state diagram showing the deformed state of the stopper bracket 31 and the rotation prevention state of the open lever 23 of FIG.
The drawing is an enlarged perspective view showing a modified example of the stopper bracket 31 shown in FIG. 10 ... Rear door, 11 ... Door outer panel, 12 ... Door inner panel, 13 ... Link reinforcement (reinforcing plate), 14 ... Rear pillar, 20 ... Door lock, 21 ... Strike, 22 ... Housing, 23
… Open lever, 24… Latch rod, 25… Outside handle, 30… Latch unlocking prevention device, 31… Stopper bracket (unlocking prevention member).

Claims (1)

[Scope of utility model registration request] 1. A door outer panel arranged outside a vehicle interior of a vehicle door, a door inner panel arranged inside the vehicle interior so as to face the door outer panel, and a vehicle body side located at an opening of the door. A striker provided on the member, a latch disposed on the door inner panel side and engaged with the striker in the closed state of the door, an outside handle disposed on the door outer panel, and extending to the door outer panel side. An open lever that has an extending portion and that rotates when the outside handle is operated to release the engagement between the latch and the striker, and the door outer panel that is disposed between the door outer panel and the open lever. Of the projection portion projecting to the side and deformation of the projection portion toward the door inner panel, Latch unlocking prevention device of the door lock, characterized in that to press the meshing direction of the switch and the striker is constituted by a unlocking preventing member made of an end portion for engaging with the open lever.