JP2979781B2 - Buckle interference prevention device for seat - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for preventing buckle interference of a seat, particularly, a seat back flip-up sheet.

[0002]

2. Description of the Related Art For example, as shown in FIG. 11, there is known a seat back flip-up type seat 3 in which a seat back 1 is supported on a seat cushion 2 so as to be tiltable (this similar structure is shown in FIG. 58). September 2002, The Japan Society of Automotive Engineers of Japan, New Edition of Automotive Engineering Handbook <Part 6>, pages 1-21 and 1
-26).

A reclining device 4 is mounted on both lower sides of the seat back 1, and a reclining dial 5 is mounted on the reclining device 4 so that the angle of the reclining device 4 is variable. The lower end of the reclining device 4 is pivotally supported by the seat cushion 2, and the seat back 1 is supported on the seat cushion 2 so as to be tiltable.

An arm 7 of a buckle device 6 for a seat belt is provided on the side of the seat cushion 2 on which the reclining dial 5 is provided.

[0005]

In the above conventional seat back flip-up seat 3, the seat belt buckle device 6 is located within the moving range of the reclining dial 5 of the seat back 1 when the seat back 1 is tilted forward. It is necessary to prevent the buckle device 6
When the arm 7 is shortened, the position of the buckle device 6 can be reduced, while the interference between the reclining dial 5 and the buckle device 6 can be prevented, so that the operability of the buckle device 6 when attaching and detaching the seat belt deteriorates.

On the other hand, it is not impossible to raise the position of the reclining dial 5, but due to the property of the reclining dial 5 in which the inclination angle of the seat back 1 is adjusted, it is best to provide the reclining dial 5 below the seat back 1.
If provided at a higher position, the structure becomes complicated and expensive.

Accordingly, the present invention provides a seat buckle interference prevention device capable of preventing interference between a buckle device and a seat adjustment dial when the seat back is flipped up without impairing the operability of the seat belt buckle device. Things.

[0008]

An arm of a buckle device for a seat belt is rotatably supported on a side portion of a seat cushion, and a bracket fixed to a lower end portion of the seat back is provided in front.
Pivotally connected to the seat cushion, and
While being supported on the seat cushion so that it can be folded over ,
The bracket is provided with a dial for adjusting the seat,
A pin provided on one of the bracket or the arm;
Provided on the other of the bracket or arm to engage with
The link mechanism with the engaging member
The structure is the seat adjustment dial and the pivot shaft of the bracket.
Disposed between, the seat back inclination 倒時, the link
Mechanism are then allowed to escape out of the range of rotation of the seat adjustment dial is tilted buckle device.

[0009]

For example, when the occupant in the rear seat operates the release lever or the like to get off the vehicle and the seat back tilts, the bracket attached to the seat back rotates with respect to the seat cushion. When the seat back tilts, the seat adjustment dial on the lower side of the seat back approaches the buckle device, but the movement of the bracket is controlled by the link mechanism provided between the bracket and the arm of the buckle device. The buckle device is transmitted to the arm and escapes from the rotation range of the seat adjustment dial, thereby preventing interference with the seat adjustment dial.

[0010]

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

In the embodiment shown in FIGS. 1-4, the seat cushion 8 is mounted on a frame 9 shown in FIG. 4, and the frame 9 is supported on a slide rail 10 fixed to a floor panel (not shown). It is.

As shown in FIGS. 1 and 4, an arm 12 of a buckle device 11 for a seat belt (not shown) is attached to a side of a rear portion of the seat cushion 8, that is, a rear portion of the frame 9 by a bolt 13. It is rotatably supported on a hinge pin 21 (support shaft X).

Here, as shown in detail in FIG. 1, the hinge pin 21 protrudes from an underline notch 22 of the reclining device 15 described later, and the reclining device 15
The reclining device 15 is held at the reset position by the hook 23 supported by the hook.

On the other hand, a reclining device 15 as a bracket is attached to the seat back 14, and the reclining device 15 on the side where the buckle device 11 is provided is provided with the seat back 14 adjacent to the buckle device 11. A reclining dial D as a seat adjustment dial is attached to the lower part.

The lower end of the reclining device 15 is pivotally supported on a pivot shaft Y (hereinafter, referred to as a pivot shaft ) of the frame 9 for supporting the seat cushion 8, and the seat back 14 is supported.
Is supported on the seat cushion 8 so that it can be tilted.

The reclining device 1
In the vicinity of the support shaft Y , a link mechanism is provided obliquely above and in front of the support shaft Y.
One end of a link arm 16 serving as an engagement member constituting the buckle device 11 is pivotally supported by a pin 17, and the other end of the link arm 16 is attached to a pin 1
It is pivoted by eight. Here, the other end of the link arm 16 is pivotally supported on the arm 12 by an elongated hole 19 to provide a degree of freedom of rotation of the buckle device 11 in the front-rear direction. We are improving.

FIG. 4 is a cross-sectional view taken along the line AA of FIG. 1 combined with a cross-sectional view of the frame 9 and the slide rail 10 to show a connection state between these and the reclining device 15. It is. Reference numeral 20 in FIG. 4 indicates a finisher of the reclining device 15.

According to the structure of the embodiment, for example, when the rear seat occupant operates the release lever (not shown) to get off and the hook 23 is disengaged from the hinge pin 21 and the seat back 14 is tilted, the reclining device 15 is buckled. The reclining dial D rotates toward the device 11 and the reclining dial D approaches the buckle device 11, but the link arm 16 rotates the arm 12 of the buckle device 11 at a larger rotation angle due to the rotation operation of the reclining device 15. Reclining dial D as shown in FIGS.
The buckle device 11 escapes downward from the rotation range P. As a result, the reclining dial D is connected to the buckle device 1
No one will interfere.

On the other hand, when the seat back 14 is reset, the buckle device 11 returns to the initial position by an operation reverse to the above, and the buckle device 11 and the reclining dial D similarly do not interfere.

Therefore, it is not necessary to lower the height of the buckle device 11 unlike the conventional buckle device shown by the two-dot chain line in FIG. 1, and the buckle proper zone (1 in FIG. 1) is sufficiently high at the reset position shown in FIG. Since Z can be secured (indicated by a dashed line), the seat belt can be easily detached and attached.

Further, since the position of the reclining dial D can be set at the lower part of the seat back 14, it can be manufactured at a lower price as compared with the case where the position of the reclining dial D is set above the seat back 14.

Next, a second embodiment will be described. still,
The same parts as those in the first embodiment will be described with the same reference numerals.

In FIGS. 5 to 7, the reclining device 15 is pivotally supported by the frame 9 of the seat cushion 8 by a support shaft Y at a lower end, and a reclining dial D is disposed at an upper end. The configuration is the same as in the first embodiment. Here, a pin 24 as a link mechanism is provided near the support shaft Y of the reclining device 15.

On the other hand, the arm 12 of the buckle device 11 is rotatably supported by a hinge pin 21 holding the reclining device 15 by a bolt 13 by a hook 23 of the reclining device 15 as in the first embodiment . on the back side of the arm 12, in a state where the front is lowered, it is attached an arcuate guide bracket 25 as an engaging member constituting the link mechanism, a groove 26 for inserting the pin 24 provided in the guide bracket 25 It is. The pin 24 is located at the lower end of the groove 26 when the seat back 14 is at the reset position.

According to the structure of the above embodiment, the seat back 1
Reclining device 1 when jumping 4
When the pivot 5 rotates, the pin 24 that pivots about the support shaft Y moves relatively in the groove 26 of the guide bracket 25 to rotate the guide bracket 25, that is, the buckle device 11 of the arm 12, so that the buckle device 11 As shown in FIGS. 6 and 7, the reclining dial D does not escape outside the rotation range P and does not interfere with the reclining dial D. When the seat back 14 is reset, the buckle device 11 returns by an operation reverse to the above. When returning to the reset position, the buckle device 11 and the reclining dial D do not interfere with each other.

Therefore, the reclining dial D and the buckle device 1 are improved while the operability of the buckle device 11 is improved.
1 can be prevented.

Next, a third embodiment will be described. Note that the same parts as those in the above embodiment are denoted by the same reference numerals and described.

In this embodiment, as shown in FIGS. 8 to 10, the reclining device 15 includes a support shaft Y, a reclining dial D, a hook 23, and a notch 22. And a stopper pin 27 that constitutes a link mechanism. On the other hand, the buckle device 1
The first arm 12, to lock the stopper pin 27 protrudes to the rear of the mounting portion of the bolt 13, a link mechanism
A projection 28 is provided as an engaging member to be configured . The arm 12 of the buckle device 11 configured as described above projects from the notch 22 of the reclining device 15,
A hinge pin 21 locked by a hook 23 is rotatably supported by a bolt 13.

According to the structure of this embodiment, at the reset position shown in FIG. 9, since the projection 28 of the arm 12 is locked to the stopper pin 27 of the reclining device 15, the rotation of the buckle device 11 is restricted. . Next, when the reclining device 15 is rotated when the seat back 14 is flipped up, the protrusion 28 of the arm 12 is locked by the stopper pin 27 of the reclining device 15 and the stopper pin 27 moves and the arm 12 is moved by its own weight. The buckle device 11 is tilted forward.

Therefore, the buckle device 11 escapes downward from the rotation range P of the reclining dial D as shown in FIG. 10 and does not interfere with the reclining dial D. When the seat back 14 returns to the reset position, the stopper pin 27
Pressing 8 causes the buckle device 11 to return. Therefore,
Also in this embodiment, the operability of the buckle device 11 at the reset position is improved, and the interference between the reclining dial D and the buckle device 11 can be prevented.

[0031]

As described above, according to the present invention, a large height of the buckle device at the reset position can be ensured, so that the buckle operation for attaching / detaching the seat belt becomes easy.

Further, when the seat back is flipped up, the arm of the buckle device can be moved out of the rotation range of the seat adjustment dial via the link mechanism by the movement of the bracket, so that the seat adjustment dial is attached to the buckle device. There is no interference.

[Brief description of the drawings]

FIG. 1 is a side view of a reset position according to a first embodiment of the present invention.

FIG. 2 is a side view of the operation state.

FIG. 3 is a side view of the operation end position.

FIG. 4 is an explanatory sectional view taken along the line AA of FIG. 1;

FIG. 5 is an exploded perspective view of a main part of the second embodiment.

FIG. 6 is a side view of the reset position.

FIG. 7 is a side view of the operation end position.

FIG. 8 is an exploded perspective view of a main part of a third embodiment.

FIG. 9 is a side view of the reset position.

FIG. 10 is a side view of the operation end position.

FIG. 11 is a side view of a conventional seat.

[Explanation of symbols]

8 seat cushion, 11 buckle device, 12 arm, 14 seat back, 15 reclining device (bracket), 16 link arm, D reclining dial (seat adjustment dial).

Continuation of the front page (58) Field surveyed (Int.Cl. ⁶ , DB name) B60R 22/18-22/26 B60N 2/00-2/54

Claims (1)

(57) [Claims] An arm of a buckle device for a seat belt is rotatably supported on a side portion of a seat cushion, and a bracket fixed to a lower end portion of the seat back is provided on the seat cushion.
® in to be pivotally connected, with retractable freely supported to the seat back the seat cushion, the bracket
Is provided with a dial for adjusting the seat,
Is a pin provided on one of the arms and a front
With the engaging member provided on the other side of the bracket or arm
While the link mechanism is configured, the link mechanism is the seat
Placed between the adjustment dial and the pivot axis of the bracket ,
The seat back tilting倒時buckle instrumentation interference prevention location of the seat, wherein the link mechanism is allowed to escape out of the range of rotation of the seat adjustment dial is tilted buckle device.