JPH0692168A - Slide lock device of automobile seat - Google Patents

Abstract

PURPOSE:To provide a slide lock device of an automobile seat where the slide lock condition of the seat can be secured even in the case when the additional external force to the normal operational force is applied to the connecting wire between the right and the left claw, such as in the head-on collision, and the cost is low. CONSTITUTION:A slide lock device of an automobile seat is provided with a slide adjusting mechanism where one of the locking claw 24R is unlocked and the other locking claw 24L is also unlocked in an interlocking manner by connecting the right and the left locking claws 24L, 24R engaged with the longitudinally arranged locking holes which are respectively provided on the right and the left seat slide mechanisms by the connecting wire to each other. The connecting wire is divided into the right and the left parts, and a connecting adaptor 40 to release the connection between the two when the deceleration exceeding the specified value is exerted, is interposed between the right and left connecting wires 30L, 30R.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a slide lock device for an automobile seat, and more particularly, when left and right lock claws are connected to each other by a connecting member and one of the lock claws is unlocked, The present invention relates to a slide lock device for a vehicle seat, which is provided with a slide adjusting mechanism that is configured so that the other lock claw is also interlocked to perform an unlocking operation.

[0002]

2. Description of the Related Art Conventionally, as a slide adjusting mechanism for an automobile seat, a plurality of locking holes arranged in the front-rear direction of a vehicle body are provided in the left and right seat slide mechanisms, and left and right locking claws that can be engaged with the locking holes are provided. While each is provided, the left and right lock pawls are interconnected by a connecting member such as a wire, and by unlocking one of the left and right lock pawls, the other lock pawl is also interlocked via the connecting member. It is generally well known that the unlocking operation is performed, and it is widely used, for example, as a front seat of an ordinary passenger car.

The seat slide mechanism is usually combined with a fixed rail (lower rail) fixed to the floor of the vehicle body on the lower rail via rolling elements such as steel balls or rollers, and is moved forward and backward with respect to the lower rail. It is configured with movable side rails (upper rails) that are slidably provided, and one of these rails is provided with an engaging member having a plurality of locking holes arranged in the longitudinal direction of the vehicle body. On the other hand, the lock claw that is disengageably engaged with the locking hole is generally attached to, for example, one of the other rails. Further, as a connecting member for connecting the left and right lock claws to each other, a normal straight wire or a thin rod material is used, and when one of the lock claws is operated in the unlock direction by operating the operation lever, for example. The other locking claw also operates in the unlocking direction at the same time via the connecting member, and the slide lock of the seat is released.

When a large deceleration is applied to the vehicle body, such as during a head-on collision, the occupant seated on the seat normally lifts his / her hips forward due to the inertial force and then moves forward again by the reaction. It is known to behave like sitting down. In this case, an impact load is applied to the seat cushion from above, and the connecting member arranged below the seat cushion is pushed downward. As a result, the left and right lock pawls are acted on by the tension generated in the connecting member. It is conceivable that the will move in the unlock direction carelessly.

Therefore, for example, Japanese Utility Model Laid-Open No. 3-888848 proposes that the left and right lock claws are connected by a so-called push-pull cable composed of an outer cable and an inner cable. There is. This push-pull cable is a hollow outer cable with an inner cable inserted as a connecting wire.
The inner cable can transmit the tension while being guided by the outer cable.

Therefore, when this push-pull cable is used, even if the push-pull cable is arranged in a loose state (that is, the outer cable), there are problems such as a delay in the interlocking operation and deterioration of the operation feeling. The left and right lock claws can be connected without being accompanied with each other. That is, by connecting the left and right lock claws with the push-pull cable and arranging the push-pull cable in a loose state below the seat cushion, even when an impact load is applied to the seat cushion from above. The push-pull cable itself is not directly affected by being pushed downward and the lock claw can be reliably maintained in the locked state.

[0007]

However, when the above push-pull cable is adopted, although the above-mentioned problems can be solved, the push-pull cable itself is expensive, so that it is costly. There was a problem that the burden became large.

Therefore, according to the present invention, the slide lock of the seat is performed even when an external force other than the unlocking operation is applied to the connecting members of the left and right lock claws when the vehicle is suddenly stopped, for example, in the case of a frontal collision of the vehicle. The purpose of the present invention is to provide a low cost slide lock device for a vehicle seat that can reliably maintain the state.

[0009]

Therefore, according to the first invention of the present application, a plurality of locking holes, which are provided in the left and right seat slide mechanisms, are arranged in the vehicle front-rear direction, and can be engaged with and disengaged from the locking holes. The left and right lock claws that engage with each other, and the connecting member that connects the left and right lock claws to each other, and by unlocking one of the left and right lock claws, the other member is connected via the connecting member. In a slide lock device for an automobile seat, which is provided with a slide adjusting mechanism configured to perform an unlocking operation in conjunction with the locking claw of the vehicle, when the deceleration of a predetermined value or more acts on the vehicle body, the connection The connection control means is provided for cutting off the connection between the left and right lock claws by the member.

Further, a second invention of the present application is the same as the first invention, wherein the connecting member is divided into left and right parts, and the connecting control means is provided between the left and right connecting members. The connecting control means engages with the terminal portions of the left and right connecting members so as to be slidable forward and backward, and moves forward of the vehicle body when a deceleration of a predetermined value or more is applied to the vehicle body. It is characterized by including an inertial mass body that is detached from at least one of the terminal portions of the member.

[0011]

According to the first invention of the present application, since the connection control means is provided, when the vehicle body is subjected to a deceleration of a predetermined value or more such as in a frontal collision of the vehicle, the left and right sides of the connection member are changed. The connection between the lock claws can be blocked. Therefore, for example, in the event of a frontal collision of the vehicle, when an external force other than the unlocking operation is applied to the connecting members of the left and right lock claws with the sudden stop of the vehicle, that is, the occupant seated in the seat is temporarily stopped when the vehicle suddenly stops. Even if the seat moves back into the seat after the movement, the locking claws can be prevented from being driven in the unlocking direction, and the slide lock state of the seat can be reliably maintained. . In this case, since it is not necessary to use an expensive push-pull cable, it is possible to avoid a large cost burden on the connecting member.

According to the second invention of the present application, basically, the same effect as that of the first invention can be obtained. In particular, since the connection control means includes the inertial mass body, when a deceleration of a predetermined value or more acts on the vehicle body, the inertial mass body moves toward the front of the vehicle body and the end portion of the connecting member is By separating from at least one of them, the connection between the left and right lock pawls is surely cut off.

[0013]

Embodiments of the present invention will now be described in detail with reference to the accompanying drawings. As shown in FIG. 1, an automobile seat 1 according to the present embodiment includes a seat cushion 2 and a reclining mechanism 4 at a rear end portion of the seat cushion 2, for example.
And a seat back 3 attached via a seat back 3, and below the seat cushion 2, a pair of left and right seat slide mechanisms 10 (10L, 10R) for supporting the seat 1 slidably in the vehicle longitudinal direction are arranged. ing. In the following description, the left and right seat slide mechanisms 10 will be described.
In the case of distinguishing each component of (10L, 10R), one for the left side and the other for the right side, the alphabetical letters L (for the left side) or R (for the right side) are respectively added after the numeral indicating the symbol. ) Is attached, and when there is no particular need to distinguish between the two, the description will be made by simply displaying only the numbers without attaching the alphabetical letters L or R.

2 and 3 are a plan explanatory view and a front explanatory view schematically showing the overall structure of the seat slide mechanism 10 (10L, 10R). As shown in these drawings, each seat slide is shown. The mechanism 10 includes a pair of left and right upper rails 11 (11L, 11R) fixed to the lower surface side of the cushion frame 6 of the seat cushion 2 in the vehicle front-rear direction via mounting brackets 7, ... Similarly, a pair of left and right lower rails 12 (12L, 12R) fixed to the front and rear direction of the vehicle body and both rails 11,
In the state in which 12 is vertically combined, it is composed of a plurality of balls 13 and rollers 14 interposed between the two. Each of the lower rails 12 is fixed to the upper surface side of a base member 15 (15L, 15R) made of steel plate, and the front and rear ends of the base member 15 are bolt members 16, 1 respectively.
It is fastened and fixed on the vehicle body floor 9 by 6.

4 to 6 show the right side seat slide mechanism 10R and its adjusting mechanism, and FIGS.
FIG. 3 is an explanatory view showing, on an enlarged scale, the left-side seat slide mechanism 10L and the main parts of its adjustment mechanism. As can be seen from these figures, the left and right lower rails 1
An engaging plate 18 (18L, 18R) having a large number of engaging holes 19 arranged at a constant pitch along the longitudinal direction is fixed to the 2 (12L, 12R) along the inner surface thereof. ing. On the other hand, the left and right upper rails 11 (11
The operation shafts 21 extending in the front-rear direction of the vehicle body are rotatably supported by brackets 23 along the inner surfaces of the L and 11R). The left and right operation shafts 21 (21
L, 21R) has a plurality of engaging claws 25 that engage with the locking holes 19, ...
4R) are fixed. Further, of the left and right operation shafts 21 (21L, 21R), an operation lever 22 for rotating the right operation shaft 21R is attached to the front end of the right operation shaft 21R, for example.

A wire member 30 (connect wire) is stretched between the left and right operation shafts 21L and 21R in order to transmit the rotational movement of the right operation shaft 21R to the left operation shaft 21L. In this embodiment, the connect wire 30
Is formed by dividing the left wire 30 into the left wire 30 and the left wire 30.
The left end of L is connected to the lower end of the wire bracket 26L fixed to the left operating shaft 21L, and the right end of the right wire 30R is connected to the upper end of the wire bracket 26R fixed to the right operating shaft 21R. . The wire brackets 26L and 26R are located forward by a predetermined distance from the front ends of the left and right brackets 23L and 23R, respectively. On the other hand, the right end of the left wire 30L and the left end of the right wire 30R are connected to each other by a connecting adapter 40 described in detail later.

When the operating lever 22 is rotated in the unlocking (unlocking) direction as indicated by the broken line arrow in FIG. 3, the right side locking shaft 21R is rotated in the same direction as the right side locking shaft 21R. , 25R is disengaged from the engaging holes 19R, ..., 19R engaged with each other, and the engaged state of the two is released. At the same time, as indicated by the broken line arrow in FIG. 6, the right wire bracket 26R
Is rotated and the connect wires 30 (30L, 30R) are pulled to the right as a whole, and the left wire bracket 26
L is rotated in the direction indicated by the dashed arrow in FIG.

As a result, the left locking claw 24L is rotated in the unlocking direction (see the broken line arrow in FIG. 8), and the engaging claw portions 25L, ..., 25L are engaged with the locking holes 19L ,. , 1
9L is disengaged and the engagement state of both is released. That is, by rotating the operation lever 22 in the unlocking direction to unlock the right seat slide mechanism 10R, the left seat slide mechanism 10L is also interlocked, and the seat 1 with respect to the vehicle body floor 9 is unlocked. The slide lock state is released. Of the two operating shafts 21L and 21R, for example, at least the right operating shaft 21R is provided with a spring 27 (see FIG. 4) for urging the operating shaft 21R in the locking direction, and the operating lever 22 does not move. In the normal state where the lock is not operated,
Due to the biasing force of the spring 27, the lock claw 24R
, 19R locking claws 25R, ..., 25R locking holes 19R, ..., 19R
The engagement state with respect to is maintained.

In this embodiment, the seat 1 is preferably a front seat located on the front side of the passenger compartment, and more preferably, the slide lock is interlocked with the forward tilting motion of the seat back 3 over a predetermined angle. Came to be released,
It has a so-called walk-in mechanism. The walk-in mechanism is the same as the well-known one,
As can be seen from FIG. 4, a swing member 31 is provided on the upper surface of the right upper rail 11R so as to be swingable in a horizontal plane via a pivot 32, one end 31a of the swing member 31 and the right operation shaft. Inner connecting rod 33 for connecting with 21R
And an outer connecting rod 35 that connects the other end 31b of the swinging member 31 and the arm member 34 (see FIG. 1) below the seat back 3 to each other.

When the seat back 3 is tilted forward by a predetermined angle or more, as shown by the two-dot chain line arrow in FIG. 4, the swinging member 31 is in the horizontal plane via the outer connecting rod 35. Can be rocked with. With this swinging motion, the inner connecting rod 33 is pulled to the right, and the right operation shaft 21R is rotated in the unlocking direction. At the same time, the left operation shaft 21L is also rotated in the unlock direction via the connect wire 30. As a result, both the lock claws 24L and 24R are rotated in the unlock direction, and the locked state of the seat slide mechanisms 10L and 10R is released. On the other hand, operation axis 2
When the lock claw 24R is rotated in the unlock direction by the operation of the 1R (that is, the operation lever 22), the inner connecting rod 33 is adapted to be disengaged from the one end 31a of the swing member 31. The swing member 31 is held in the posture shown in FIGS. 2 and 4 without swinging. Therefore, in this case, the outer connecting rod 35 is not pulled, and the posture of the seat back 3 is not affected.

By the way, in the present embodiment, the connect wire 3 for connecting the left and right lock claws 24L, 24R to each other.
As described above, 0 is divided into two parts on the left and right sides, and the left and right connect wires 30L and 30R are connected via the connection adapter 40 as the connection control means in the present application. When the vehicle body is decelerated by a predetermined value or more, the left and right lock pawls 24L,
The connection between the 24Rs is cut off. Hereinafter, the connection adapter 40 will be described. As can be seen from FIGS. 3 and 10, in this embodiment, a support bracket 51 for supporting the connecting adapter 40 is provided on the lower surface side of the cushion frame 6 of the seat cushion 2.
The guide rail 52 for guiding the connecting adapter 40 slidably in the vehicle width direction is fixed to the lower surface side of the support bracket 51.

The connecting adapter 40 is used for the guide rail 5
2, a slider portion 41 slidably fitted in the vehicle width direction,
It has a hollow case part 42 suspended below the slider part 41, and as shown in FIG. 11, by assembling the left and right halves 40L, 40R from each other,
An adapter 40 as an integrated product is formed. 12
As can be seen from FIG. 13 and FIG. 13, the case portion 42 of the connecting adapter 40 has a hollow cylindrical portion 43 having a cross-sectional peripheral shape of an ellipse and arranged in the vehicle front-rear direction, and the cylindrical portion 4.
3 is composed of a front wall 44 and a rear wall 45 that close the front end side and the rear end side, respectively.
A large number of slit holes 44h are formed along the outer peripheral shape in the vicinity of the outer edge portion. That is, the inner portion 44a and the outer portion 44b of the front wall 44 have the slit holes 4
It is connected only by the fairly narrow connecting part left for 4 hours. Therefore, from the front-back direction, this front wall 4
When a load of a predetermined value or more is applied to the inner portion 44a of No. 4, the connecting portion with the outer portion 44b is broken, and the inner portion 44a is relatively easily separated from the case tubular portion 43 and detached.

A connecting pin 47 as an inertial mass body in the present application is housed in the case cylinder portion 43. The connecting pin 47 has a cylindrical shaft portion 47a,
It is composed of a flat plate-shaped head portion 47b located at the front end portion thereof, and is manufactured so that the weight as a whole becomes a predetermined value set in advance, and along the longitudinal direction thereof in the case tubular portion 43. (That is, with the front-back direction of the vehicle)
It is stored slidably. The connecting pin 47
When a deceleration of a predetermined value or more is applied to the vehicle body, the weight of the vehicle is due to the load to the front of the vehicle body based on the inertial force of the vehicle body. Each connecting part with and is broken, and the inner part 4
4a is set as a value by which the front end side of the cylindrical portion 43 can be opened by separating from the case portion 42. The right end 39L of the left connect wire 30L and the left end 39R of the right connect wire 30R are engaged with the shaft 47a of the connecting pin 47. That is, the terminal portions 39L and 39R of both the connect wires 30L and 30R are engaged with each other via the connecting pin 47.

The above left and right connect wires 30L, 30R
Each of the terminal portions 39L, 39R is inserted into the cylindrical portion 43 through the openings 43L, 43R (see FIG. 11) formed on the side surface of the case cylindrical portion 43, and the shaft portion 47a of the connecting pin 47 is inserted.
To the left and right halves 40 of the adapter 40
L and 40R are assembled. The terminal portions 39L and 39R of the connect wires 30L and 30R are both formed in a hook shape, and the shaft portion 47a of the connecting pin 47 is formed.
Is engaged with these terminal portions 39L, 39R slidably in the vehicle body front-rear direction. In this example,
Since the slider portion 41 is provided on the connecting adapter 40 and the slider portion 41 is slidably fitted to the guide rail 52 in the vehicle width direction, the operation lever 22 is rotated in the unlock direction. When the connecting wire 30 (30L, 30R) is pulled due to an operating force, for example, when the connecting wire 30 (30L, 30R) is pulled, the slider portion 41 slides freely along the guide rail 52 in the vehicle width direction to connect. The wire 30 as a whole can be displaced in the operation direction without any trouble.

In the above construction, for example, when the vehicle collides head-on, and when the vehicle is suddenly stopped and the vehicle body is decelerated to a certain extent or more, the connecting pin 47 housed in the case portion 42 of the connecting adapter 40. Moves forward while sliding with respect to the respective terminal portions 39L, 39R of the connect wires 30L, 30R, and collides with the inner portion 44a of the tubular portion front wall 44. When the deceleration acting on the vehicle body is equal to or greater than the predetermined value, as shown in FIG. 14, the connecting portions between the inner portion 44a and the outer portion 44b of the front wall 44 are broken and the inner portion 44a is The cylindrical portion 4 is detached from the case portion 42.
The front end side of 3 is opened. As a result, the connecting pin 47 falls off from the inside of the case tube portion 43, and the connecting wire 30L,
The engagement state with each of the terminal portions 39L and 39R of 30R or at least one of them is released. That is, for example, as shown in FIG.
The connection between 0L and the right connect wire 30R is cut off. Therefore, in the event of a frontal collision of the vehicle or the like, the tension is applied to the wire 30 even when an external force other than the lock release operation is applied to the connect wire 30 (30L, 30R) that is a connecting member between the left and right lock claws 24L and 24R. It does not occur, the left and right lock claws 24
It is possible to prevent the slide lock state of the seat 1 from being inadvertently released because the L and 24R are not interlocked to rotate in the unlock direction.

As described above, according to this embodiment, the connecting wire 30 for connecting the left and right lock claws 24L, 24R to each other is formed by dividing the connecting wire 30 into left and right parts. To the above-mentioned connection adapter 40
Since the vehicle has a deceleration of a predetermined value or more such as a frontal collision of the vehicle, the connect wire 30 (3
0L, 30R) above left and right lock claws 24L, 24R
It is possible to cut off the connection between each other. Therefore, the connection wire 30 (30L, 3L) between the left and right lock pawls 24L, 24R is accompanied by a sudden stop of the vehicle, for example, in the case of a frontal collision of the vehicle.
(0R) is applied with an external force that is not due to the unlocking operation, that is, an occupant seated on the seat 1 moves forward once when the vehicle suddenly stops, and then the reaction force vigorously causes the seat 1 to move again.
Even when you are seated in the seat, both lock claws 24
It is possible to prevent the L and 24R from being interlocked and driven in the unlocking direction, and to reliably maintain the slide lock state of the seat 1. In this case, since it is not necessary to use an expensive push-pull cable and an ordinary straight wire member can be used, it is possible to avoid a large cost burden for the connecting member.

Further, in particular, the connection adapter 40 includes the terminal portions 39 of the left and right connect wires 30L and 30R.
L and 39R are slidably engaged with each other, and when a deceleration of a predetermined value or more is applied to the vehicle body, the vehicle moves forward of the vehicle body and disengages from at least one of the terminal portions 39L and 39R. Since the connecting pin 47 thus configured is provided, when the vehicle body is subjected to a deceleration more than the predetermined value such as in a frontal collision, the left and right connect wires 30L and 30R are disconnected from each other, and the left and right connect wires 30L and 30R are disconnected. The connection between the lock claws 24L and 24R is reliably cut off.

[Brief description of drawings]

FIG. 1 is a side view of an automobile seat according to an embodiment of the present invention.

FIG. 2 is a plan explanatory view of a seat slide mechanism of the seat and an adjusting mechanism thereof.

FIG. 3 is a front explanatory view of a seat slide mechanism of the seat and an adjusting mechanism thereof.

FIG. 4 is an explanatory plan view showing enlarged main parts of a seat slide mechanism on the right side of the seat and an adjusting mechanism thereof.

5 is a vertical cross-sectional explanatory view taken along the line AA of FIG.

FIG. 6 is a vertical cross-sectional explanatory view taken along the line BB of FIG.

FIG. 7 is an explanatory plan view showing enlarged main parts of a seat slide mechanism on the right side of the seat and an adjusting mechanism thereof.

8 is a vertical cross-sectional explanatory view in the CC line direction of FIG.

9 is a vertical cross-sectional explanatory view taken along the line DD of FIG.

FIG. 10 is a front explanatory view showing a mounting state of the connection adapter according to the above-described embodiment.

FIG. 11 is an exploded perspective view of the connection adapter.

FIG. 12 is a front explanatory view of the connection adapter.

FIG. 13 is an explanatory longitudinal sectional view taken along line EE of FIG.

FIG. 14 is an explanatory longitudinal sectional view showing a disengaged state between the connecting pin and the end portions of the left and right connect wires.

FIG. 15 is a front explanatory view showing a released state of the connection between the left and right connect wires.

[Explanation of symbols]

 1 ... Seat 10L, 10R ... Seat slide mechanism 19L, 19R ... Locking hole 21L ... Left operation shaft 24L, 24R ... Lock claw 25L, 25R ... Engaging claw 30L, 30R ... Connect wire 39L, 39R ... Connect wire end Part 40 ... Connection adapter 47 ... Connection pin

Claims (2)

[Claims] 1. A plurality of locking holes arranged in the front-rear direction of a vehicle body, which are respectively provided in the left and right seat slide mechanisms, left and right locking claws that are removably engaged with the locking holes, and the left and right locking claws. And a connecting member that connects the two to each other, and by unlocking one of the left and right lock pawls, the other locking pawl is also interlocked via the connecting member to perform an unlocking operation. A slide lock device for an automobile seat, comprising a slide adjusting mechanism, wherein when the vehicle body is decelerated by a predetermined value or more, the connection between the left and right lock pawls is cut off by the connecting member. A slide lock device for an automobile seat, which is provided with a connection control means. 2. The connecting member is divided into left and right parts, and the connecting control means is interposed between the left and right connecting members, and the connecting control means is provided for the left and right connecting members. An inertial mass body that engages with the terminal portions so as to be slidable back and forth, and moves forward of the vehicle body and disengages from at least one of the terminal portions of the connecting member when a deceleration of a predetermined value or more acts on the vehicle body. The slide lock device for a vehicle seat according to claim 1, further comprising: