JPH1096357A - Lock device for vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve safety of a vehicle by forming a bead part projecting to the cushioning part side on the locking leg of a latch. SOLUTION: The outer surface of a latch 6 is covered with a cushioning part 16, a bead part 20 extending from the end part 18 of a locking leg 11 to the vicinity of the rotational center 19 is provided on the opposite face 17 side of a base plate 3, and the height of the bead part 20 is set not to be larger than the thickness of the cushioning part 16. Next when force in the P-direction is applied to a lock device by a striker 2, the force in the P-direction is wholly applied to the locking leg 11, the latch 6 is inclined so as to contact with the plate 3, thereafter the base plate 3 together with the latch 6 are deformed, but because the section modulus of the locking leg 11 is large due to the bead part 20, the strength is high and the deformed quantity is small, and it can bear the large force by cooperation with the base plate 3. Hereby, the high load in the P-direction can be borne, even at collision of a vehicle breakdown of the lock device and opening of an opening/closing body can be obstructed, and hence safety of the vehicle can be improved.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a locking device for a vehicle for holding an opening / closing body of a vehicle at a door closing position.

[0002]

2. Description of the Related Art Conventionally, various lock devices for vehicles have been proposed.
As shown in Japanese Patent No. 107081, a flat-type latch is provided which engages with a striker attached to the vehicle body, and a ratchet which engages with the latch to hold the latch at the door closing position. As shown in JP-A-3-107081,
It is known to cover the surface of the latch with a cushioning member such as resin or rubber so that metallic noise is not generated when the door is closed and opened. In addition, various proposals have been made to increase the strength and rigidity of the lock device so that the opening / closing body does not open even when an impact or deformation occurs at the time of a vehicle collision. There is a number.

[0003]

SUMMARY OF THE INVENTION A conventionally known Japanese Patent Application Laid-open No. Sho 62
In Japanese Patent No. -244985, the strength and rigidity of the locking device A are increased by increasing the strength and rigidity of the housing as shown in FIG. 5, but when a large force is applied in the P direction by the striker B as shown in FIG. , Latch E fork F
Are deformed, and the bottom surface D is deformed while being in contact with the bottom surface D of the base housing C. Finally, the fork portion F of the latch E, which has overlapped on the bottom surface D of the base housing C,
Comes off the bottom surface D. Immediately before the fork portion F comes off the bottom surface D, the force in the P direction shows the maximum value. Further, as shown in FIG. 7, when a large force is applied in the Q direction by the striker B, a bending force is applied to the fork portion F of the latch E, and the latch E eventually breaks. Immediately before the fork portion F breaks, the force in the Q direction takes a maximum value. The present invention provides a locking device for a vehicle that can withstand the forces in the P and Q directions and has high safety.

[0004]

SUMMARY OF THE INVENTION Accordingly, the present invention provides a base plate attached to one of an opening / closing body and a vehicle body, and a base plate rotatably supported by the base plate and attached to either the opening / closing body or the vehicle body. A latch engaged with the striker, and a ratchet rotatably supported by the base plate and holding the latch in a closed state, wherein the latch is provided with an engaging step for engaging the ratchet. An engaging groove formed by a locking leg and a rotating leg for engaging the striker, and a buffer covering at least a part of an outer surface of the latch. This is a locking device for a vehicle in which a bead portion protruding to the side is formed. The vehicle lock device according to claim 1, wherein the bead portion is formed from an end of the locking leg to a position near a rotation center of the latch. The vehicle lock device according to claim 1 or 2, wherein the height of the bead portion is formed not to be larger than the thickness of the buffer portion. The vehicle lock device according to claim 1, wherein the bead portion is formed on a side of the latch opposite to the base plate.

[0005]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described with reference to the drawings. FIG. 1 shows a closed state, and 1 denotes a lock device which is attached to one of an opening / closing body and a vehicle body. A striker 2 is attached to the opening / closing body or the other of the vehicle body. In the lock device 1, a housing is formed by a base plate 3 and a resin body 4, and a latch 6 and a ratchet 7 are housed in a concave portion 5 of the resin body 4, and the latch 6 meshes with the striker 2 to hold the opening / closing body at a door closing position. I do. 8 is a back plate. The latch 6 is rotatably attached to the base plate 3 by a shaft 9, and a mating groove 10 for engaging with the striker 2 is formed by the locking leg 11 and the rotating leg 12, and at least one engaging with the ratchet 7. It has an engagement step 13. The ratchet 7 is rotatably supported by the base plate 3 and has an engagement claw 15 that engages with the engagement step 13 of the latch 6 to prevent the latch 6 from rotating. The base plate 3 is provided with an entrance groove 22 for the striker 2.

The latch 6 has a flat plate shape, and its outer surface is covered with a buffer 16 made of resin, rubber or the like, and the end 18 of the locking leg 11 is provided on the opposite surface 17 of the base plate 3.
A bead portion 20 extending from the center to the vicinity of the rotation center 19 of the latch is provided. The height of the bead portion 20 is set to a size that does not become larger than the thickness of the buffer portion 16. In the figure, the buffer portion 16 is provided on the outer surface of the latch except for the engaging step portion 13 and the upper surface 21 side of the bead portion 20, but can be increased or decreased as necessary. The upper surface 21 side of the bead portion 20 may be covered with the buffer portion 16. The bottom surface portion 23 of the concave portion 5 of the resin body 4 is set to a depth capable of preventing rattle in the thickness direction of the latch 6 and the ratchet 7, and a gap regulation that allows the latch and ratchet to rotate smoothly without rattle. Part is formed.

[0007]

Next, the operation will be described. The case where a force in the P direction acts on the lock device 1 of the present invention by the striker 2 will be described. The force in the P direction by the striker 2 is applied to all the locking legs 11 of the latch 6, and the latch 6 tilts and the base plate 3
After that, the base plate 3 is deformed together with the latch 6. At this time, since the section modulus of the locking leg 11 of the latch 6 is increased by the bead portion 20 and the strength is large and the amount of deformation is small, it can withstand a large force in cooperation with the base plate 3. When a force in the P direction is applied to the latch 6, the locking legs 11 of the latch 6 abut on the base plate 3 at both end surfaces excluding the bead portion 20 in the width direction, and the P is applied to the base plate 3. Directional forces are distributed.

Next, when a force in the Q direction is applied by the striker 2, all the force in the Q direction is applied to the locking legs 11 of the latch 6, but the section modulus of the locking legs 11 in the Q direction is
Since it is larger than 0, it can withstand a large force. The latch 6 is located on the bottom 23 of the resin body 4.
However, since the bead portion 20 provided on the latch 6 does not protrude from the outer surface of the buffer portion 16 covering the outer surface of the latch 6, only the bead portion 20 and the bottom portion 23 are rotated. There is no contact, and smooth rotation of the latch 6 is ensured.

[0009]

As described above, according to the present invention,
It can withstand high loads in the P and Q directions, and can prevent the locking device from being damaged and the opening and closing body from being opened even in the event of a vehicle collision, thereby improving safety. Also, since the bead portion does not protrude from the buffer portion, the rotation of the latch is smooth. Further, since the bead portion is provided on the opposite surface side of the base plate, when a force in the P direction is applied, both end surfaces in the width direction of the latching legs of the latch abut on the base plate 3, and the base plate is in the P direction. It can withstand large forces because it distributes and handles the forces.

[Brief description of the drawings]

FIG. 1 is a plan view of a lock device showing an embodiment of the present invention.

FIG. 2 is a sectional view taken along line XX of FIG.

FIG. 3 is a plan view of a latch.

FIG. 4 is an enlarged view of a YY section in FIG. 3;

FIG. 5 is a longitudinal sectional view of a conventionally known locking device.

FIG. 6 is a diagram showing a state in which a force in a P direction is applied to the lock device of FIG. 5;

FIG. 7 is a transverse sectional view of FIG. 5;

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Locking device, 2 ... Striker, 3 ... Base plate, 4 ... Resin body, 5 ... Recess, 6 ... Latch, 7 ... Ratchet, 8 ... Back plate, 9 ... Shaft, 10 ... Mating groove,
11: locking leg, 12: rotating leg, 13: engaging step, 14 ...
Axial support, 15: engaging claw, 16: buffer, 17: opposite surface, 1
Reference numeral 8: end portion, 19: rotation center, 20: bead portion, 21: top surface, 22: entry groove, 23: bottom portion.

Claims (4)

[Claims] 1. A base plate attached to one of an opening / closing body and a vehicle body, a latch rotatably supported by the base plate and meshing with a striker attached to one of the opening / closing body and the vehicle body, and the base plate. And a ratchet rotatably supported on the ratchet and holding the latch in a closed state, wherein the latch comprises an engaging step portion that engages with the ratchet, and a locking leg and a rotating leg. The engaging leg is formed to engage with the striker, and a buffer portion covering at least a part of an outer surface of the latch is provided. A bead portion projecting toward the buffer portion is formed on the locking leg. Locking device for vehicles. 2. The vehicle lock device according to claim 1, wherein the bead portion is formed from an end of the locking leg to a position near a rotation center of the latch. 3. The bead portion is formed so that the height of the bead portion is not larger than the thickness of the buffer portion.
The lock device for a vehicle according to any one of the preceding claims. 4. The vehicle lock device according to claim 1, wherein the bead portion is formed on a side of the latch opposite to the base plate.