JPH08230536A - Seat lock mechanism - Google Patents

Abstract

PURPOSE: To provide a seat lock mechanism capable of increasing an area of a lock lever to be engaged with a striker as large as possible. CONSTITUTION: A striker 10 comprises a shaft lever 11 of which base part is attached to a seat cushion side and a lock part 12 formed at the top part of the shaft lever 11. Also an engagement means 20 comprises a base plate 21 fixed to the floor side of a body and lock lever 22 pivoted rotatably on the base plate 21. Then one side of the lock lever 22 is provided with an engaging recessed part 22a engaged with an area occupying the majority of area of the lock part 12 of the striker 10, an operating means 30 rotates the lock lever 22, and the engaging recessed part 22a is formed so that it can be engaged with and disengaged from the lock part 12 of the striker 10.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle seat, and more particularly to a seat lock mechanism mounted on a retractable rear seat of a vehicle for loading luggage.

[0002]

2. Description of the Related Art FIGS. 7 to 9 relate to a conventional example, FIG. 7 is a perspective explanatory view schematically showing a seat lock mechanism mounted on a retractable rear seat of a vehicle for loading luggage, and FIG. 8 is a main part of the seat lock mechanism. And FIG. 9 is an explanatory plan view showing an engagement state between the striker and the lock lever of the seat lock mechanism.

In the figure, a rear seat 1 is composed of a seat cushion 1a and a seat back 1b. Legs 3 connected and pivoted to a floor 2 of a vehicle body are provided at both front ends of the seat cushion 1a, and the seat cushion 1a is front. It is supported so that it can be folded to the side.

The seat lock mechanism 4 includes a striker 5 fixed to the rear portion of the seat cushion 1a toward the floor 2, and a striker 5 pivotally supported on the floor 2 side.
The lock lever 6 is provided with a curved surface portion 6a that engages with the locking portion 5a, and the operation lever 8 that swings the lock lever 6 via the cable 7.

Then, the operating lever 8 is operated to release the engagement between the locking portion 5a of the striker 5 and the curved surface portion 6a of the lock lever 6, so that the rear seat 1 is moved toward the front side (in the direction of arrow A) through the leg 3. ) And the recess 2a of the floor 2
Is configured to be stored in.

[0006]

However, in the seat lock mechanism 4 described above, when the lock lever 6 is engaged with the striker 5, the engaging portion 6a of the lock lever 6 is formed into a curved surface with a large radius of curvature. Lock lever 6
The engagement area of is small as shown by the diagonal lines in FIG. For this reason, when the surface pressure acting on the engagement surface becomes high due to vibration or the like during traveling of the vehicle, the lock lever 6 is easily deformed. In order to prevent this deformation, the wall thickness of the lock lever 6 is increased to increase the strength of the lock lever 6. However, there is a problem in that the weight is large and the cost is high.

The present invention has been made to solve the above-mentioned problems of the prior art, and its purpose is to:
An object of the present invention is to provide a seat lock mechanism in which the engagement area of the lock lever with the striker can be increased as much as possible.

[0008]

To achieve the above object, the present invention provides a striker fixed to the seat cushion side of a seat toward the floor of the vehicle body, and disengaged from the striker arranged on the floor side of the vehicle body. A seat lock mechanism comprising an engaging means and an operating means for activating the engaging means, wherein the striker is formed on a shaft rod to which a base is attached on a seat cushion side, and a tip end portion of the shaft rod. The engaging means comprises a base plate fixed to the floor side of the vehicle body and a lock lever pivotally supported by the base plate. The striker has an engaging concave portion that engages with an area occupying a majority of the engaging portion of the striker, the actuating means swings the lock lever, and the engaging concave portion can be engaged with and disengaged from the engaging portion of the striker. To It is characterized by being configured to so that.

[0009]

According to the above-mentioned structure, when the seat is locked, the engaging recess of the lock lever engages with the locking portion in an area occupying a majority of the locking portion of the striker, so that the locking of the striker with respect to the locking portion is performed. The engagement area of the engagement recess of the lever can be significantly increased. As a result, the required strength of the lock lever can be reduced, and the wall thickness of the lock lever can be significantly reduced, so that the weight can be reduced and the cost can be reduced.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will now be described based on the embodiments shown in the drawings.

FIG. 1 is an explanatory plan view of the seat lock mechanism,
FIG. 2 is a perspective explanatory view showing the main part of the same, and FIG. 3 is II of FIG.
I-III arrow cross-sectional explanatory view, FIG. 4 is a IV-IV arrow cross-sectional explanatory view of FIG. 1, FIG. 5 is a plan view explanatory view showing the engagement state of the striker and the lock lever of the seat lock mechanism, and FIG. It is a perspective explanatory view showing the outline where a seat lock mechanism was attached to a retractable rear seat of a luggage loading vehicle.

The same parts as those shown in FIG. 7 are designated by the same reference numerals in the following description.

In the drawing, E is a seat lock mechanism, which is a striker 10 fixed to the seat cushion 1a side of the seat 1 toward the floor 2 of the vehicle body, and an engagement for engaging the striker 10 arranged on the floor 2 side of the vehicle body. It comprises means 20 and actuating means 30 for actuating this engaging means 20.

In the seat lock mechanism E according to the present invention, the striker 10 includes the shaft rod 11 to which the base is attached on the seat cushion 1a side, and the locking portion 12 formed at the tip end of the shaft rod 11. Constituting means 20
Is composed of a base plate 21 fixed to the floor 2 side of the vehicle body and a lock lever 22 pivotally supported by the base plate 21. The striker 1 is attached to one side of the lock lever 22.
0 has an engaging recess 22a that engages with an area occupying a majority of the engaging portion 12, and the operating means 30 swings the lock lever 22 so that the engaging recess 22a is attached to the engaging portion 12 of the striker 10. It is characterized by being configured so that it can be engaged and disengaged.

Further, the structure of the present invention will be described in detail.

The seat lock mechanism E is mounted on a seat, for example, a retractable rear seat 1 of a luggage loading vehicle. The rear seat 1 includes a seat cushion 1a and a seat back 1.
b, and at the front ends of the seat cushion 1a,
The floor 3 of the vehicle body is provided with legs 3 which are connected and pivotally connected to each other, and supports the seat cushion 1a so as to be foldable downward on the front side.

By unlocking the striker 10 of the seat lock mechanism E, the rear seat 1 is tilted to the front side (in the direction of arrow A) through the leg 3 and stored in the recess 2a of the floor 2. ing.

The seat lock mechanism E comprises a striker 10, an engaging means 20, and an actuating means 30. The striker 10 includes a shaft rod 11 having a base portion attached to the rear rear surface of the seat cushion 1a, and this shaft. A substantially hemispherical head 11a formed by bulging the tip of the rod 11 and the head 11
On the shaft rod 11 side of "a", there is provided a locking portion 12 formed of a plane formed orthogonal to the shaft rod 11.

The engaging means 20 is composed of a base plate 21 fixed to the floor 2 side and a lock lever 22 pivotally supported on the base plate 21 by a pivot 22e.
The board 21 has an insertion hole 21d into which the striker 10 is inserted.
And a burring portion 21a integrally formed on the periphery of the insertion hole 21d so as to project toward the mounting side of the lock lever 22. The burring portion 21a is formed with a notch groove 21c notched in the circumferential direction. But this notch 2
The lock lever 22 is configured to be fitted into the shaft rod 11 of the striker 10 and to be engaged with the side of the lock lever 22 engaged with the striker 10 with an area occupying a majority of the locking portions 12 of the striker 10. An engaging recess 22a is formed. The engagement recess 22a has an arc portion 22b having a radius substantially equal to the radius of the shaft rod 11 of the striker 10 and a curved surface portion 22c extending in an L shape with the arc portion 22b interposed therebetween.
22d.

Further, the arcuate portion 22b of the engaging recess 22a.
Is engaged with the shaft rod 11 of the striker 10, so that the straight line A connecting both ends of the engagement recess 22a that abuts the locking portion 12 of the striker 10 exceeds the center 0 of the striker 10, that is, It is configured to engage with each other in an area occupying a majority of the plane of the locking portion 12.

Further, the lock lever 22 has an engaging recess 22a formed by an engaging hole 22f formed in an intermediate portion of the lock lever 22 and a tension spring 23 having both ends engaged with an engaging portion 21b formed on the substrate 21. The striker 10 is biased in a direction to engage with the shaft rod 11.

The operating means 30 has a rod 31 whose one end is connected and supported by a pin 31a to the tip of the lock lever 22.
And an operation knob 32 attached to the other end of this rod 31
And the operation knob 32 is pulled against the tension spring 23 to pull the operating portion 32 of the striker 10 and the lock lever 2.
By releasing the engagement with the engaging recess 22a of the second seat 2, the rear seat 1 is tilted to the front side via the leg 3 and the floor 2
It is configured to be stored in the concave portion 2a.

Next, the operation of the embodiment of the present invention will be described.

When the seat is locked, as shown in FIG.
The arcuate portion 22b of the engagement concave portion 22a of the lock lever 22 is engaged with the shaft rod 11 of the striker 10, and the striker 1
Even if 0 is moved in the axial direction, the locking portion 12 of the striker 10 engages with the engagement recess 22a of the lock lever 22 and locks the striker 10 so as not to come off from the insertion hole 21d of the substrate 21.

When the seat is locked, the lock lever 22
The engaging recess 22a of the locking portion 1 has an area that occupies the majority of the locking portions 12 of the striker 10, as shown by the diagonal lines in FIG.
Since the engagement recess 2a of the lock lever 22 is engaged with the engagement portion 12 of the striker 10, the engagement area of the engagement recess 22a of the lock lever 22 can be significantly increased.

Further, since the lock lever 22 is fitted in the notch groove 21c of the base plate 21 and engaged with the shaft rod 11 of the striker 10, the load acting in the direction of removing the striker 10 from the insertion hole 21d is locked. Axis 22e of lever 22
Does not directly act on the substrate 21 and is input to the substrate 21 from the edge of the cutout groove 21c. As a result, the lock lever 22
Since the surface pressure acting on the lock lever 22 can be reduced and the bending moment acting on the lock lever 22 can be reduced, the required strength of the lock lever 22 can be reduced, and the wall thickness of the lock lever 22 can be significantly reduced. Therefore, the weight can be reduced and the cost can be reduced. Further, since the lock lever 22 is fitted into the cutout groove 21c of the substrate 21, it is possible to prevent the lock lever 22 from being vertically deformed due to vibration of the vehicle or the like to cause rattling or noise.

When the rear seat 1 is stowed from the seat lock state described above, the operation knob 32 is moved to the tension spring 23.
Against it, pull it toward you. Then, as shown by the phantom line in FIG. 1, the lock lever 22 swings in the direction of arrow B, the engagement recess 22a of the lock lever 22 and the engagement portion 12 of the striker 10 are released, and the striker 10 moves. Since the lock is released, the rear portion of the seat cushion 1a of the rear seat 1 is lifted and the striker 10 is inserted into the insertion hole 2 of the board 21.
Extract from 1d.

When the operating knob 32 is released in this state, the lock lever 22 returns to the position shown by the solid line in FIG. 1 again by the spring force of the tension spring 23. Then, the rear seat 1 can be stowed in the recess 2 a of the floor 2 by tilting it to the front side via the leg 3.

When the rear seat 1 in the stored state is raised again so that it can be seated and the seat is locked, when the rear seat 1 is erected to the rear side through the leg 3, the striker 10 is positioned at the position of the insertion hole 21d of the board 21. Then, the striker 10 is inserted into the insertion hole 21d. Then, the head portion 11a of the striker 10 comes into contact with the engaging recess 22a of the lock lever 22 to move the lock lever 22 to the arrow B direction.
The striker 10 moves toward the insertion hole 21 of the substrate 21.
inserted into d.

At this time, the lock lever 22 moves the striker 1
The load pressed in the insertion direction by the head portion 11a of 0 is input to the substrate 21 from the edge portion of the cutout groove 21c into which the lock lever 22 is fitted, and thus directly acts on the pivot shaft 22e of the lock lever 22. There is no such thing. Further, the engaging recess 22a of the lock lever 22 moves while contacting the head 11a having a circular top surface by the spring force of the tension spring 23, and then engages with the shaft rod 11 of the striker 10, whereby the striker 10 moves. Since the seat is locked and the rear seat 1 can be seat-locked, it is not necessary to operate the operation knob 32, and the striker 10 can be locked smoothly.

Further, the engaging recess 22a of the lock lever 22
When the head 11a of the striker 10 is inserted by rotating, the chamfered edges of the arcuate portion 22b and the curved surface portions 22c, 22d of the engaging recess 22a are facilitated to facilitate the rotation of the lock lever 22. The tapered portion 22g is formed.

Further, since the rear seat 1 rotates about the connecting fulcrum of the leg 3 on the floor 2 side, the striker 10 is inserted obliquely into the insertion hole 21d of the board 21, but the lock lever 22 is engaged. By forming the fitting recess 22a into a substantially L-shape and providing the arc portion 22b having a radius substantially equal to that of the shaft rod 11, the shaft rod 1 of the striker 10 is provided.
1 is drawn into the circular arc portion 22b of the engaging recess 22a,
It is always locked at a fixed position and can be prevented from slipping and rattling.

In the above embodiment, the rear seat 1 is a single divided left and right seat, but it is of course applicable to a double type rear seat 1 in which the left and right seats are integrated.

[0034]

As described above, according to the present invention, when the seat is locked, the engaging recess of the lock lever engages with the engaging portion with an area occupying a majority of the engaging portion of the striker. The engagement area of the engagement recess of the lock lever with respect to the engagement portion can be significantly increased. As a result, the required strength of the lock lever can be reduced, and the wall thickness of the lock lever can be significantly reduced, so that the weight can be reduced and the cost can be reduced.

[Brief description of drawings]

FIG. 1 is an explanatory plan view of a seat lock mechanism according to the present invention.

FIG. 2 is a perspective explanatory view showing a main part of the same.

FIG. 3 is a cross sectional view taken along the line III-III of FIG.

4 is a cross-sectional view taken along the line IV-IV of FIG.

FIG. 5 is an explanatory plan view showing an engaged state of the striker and the lock lever of the seat lock mechanism according to the present invention.

FIG. 6 is an explanatory perspective view showing an outline of a state in which the seat lock mechanism according to the present invention is mounted on a retractable rear seat of a luggage loading vehicle.

FIG. 7 is a perspective explanatory view schematically showing a state in which a seat lock mechanism according to a conventional example is attached to a retractable rear seat of a luggage loading vehicle.

FIG. 8 is a perspective explanatory view showing a main part of a seat lock mechanism according to a conventional example.

FIG. 9 is an explanatory plan view showing an engagement state between the striker and the lock lever.

[Explanation of symbols]

 1 Rear Seat 1a Seat Cushion 2 Floor 10 Striker 11 Shaft Rod 12 Locking Part 20 Engaging Means 21 Board 22 Lock Lever 22a Engaging Recess 23 Tension Spring 30 Actuating Means 31 Rod 32 Operation Knob E Seat Lock Mechanism

Claims (1)

[Claims] 1. A striker fixed to a seat cushion side of a seat toward a floor of a vehicle body, an engagement means arranged on the floor side of the vehicle body for engaging and disengaging the striker, and an operating means for operating the engagement means. In the seat lock mechanism, the striker includes a shaft rod having a base portion attached to the seat cushion side, and a locking portion formed at a tip end portion of the shaft rod, and the engagement means is a vehicle body. Of the base plate and a lock lever pivotally supported on the base plate. The lock lever is engaged with one side of the lock lever in an area occupying a majority of the engaging portions of the striker. A seat lock mechanism having an engagement recess, wherein the actuating means swings the lock lever so that the engagement recess can be engaged with and disengaged from the engagement portion of the striker.