JPH11105668A - Seat belt device for device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To avoid a mistake of a release procedure without playing of a tongue in the halfway of a belt, by having a second insertion port in an upper surface able to engage with a belt side tongue in a belt side engaging part, when it is engaged with the belt side tongue, releasing engagement of a seat side engaging part with an engaged part. SOLUTION: In an engaging condition of a buckle 7 with a tongue 2, a tongue 10 in the halfway of a belt 5 is engaged with a seat side buckle 4, an occupant is surely constrained. A part of a lap belt 5a of the belt 5, moving both ends integrally with a rear seat 1, sliding up to a belly part is suppressed. In removal of the belt 5, a release button of the buckle 4 is pressed, the tongue 10 is drawn out from the buckle 4. In order to remove a buckle 7 from a tongue 2, the tongue 10 extracted from the buckle 4 is engaged with a second insertion port 9 of the duckle 7, the tongue 2 is extruded to be removed from an engaged part. The belt 5 is wound to a car body anchor part 6, but the tongue 10 is engaged with the second insertion port 9, without a play, backlash prevention and a fixed release procedure can be established.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle seatbelt device, and more particularly to a vehicle seatbelt device for suppressing a lap belt from rising toward an abdomen.

[0002]

2. Description of the Related Art A general three-point seat belt device has upper and lower ends of a belt supported by upper and lower anchors of a vehicle body, at least one end of which can be freely wound, and a tongue inserted loosely in the middle of the belt. Is engaged with a buckle attached to the interior side of the seat to restrain the occupant on the seat. Of the belt that restrains the occupant, the lap belt restrains the vicinity of the abdomen of the occupant between the lower anchor portion and the tongue, and the shoulder belt between the upper anchor portion and the tongue as a shoulder belt. The area is restrained diagonally.

Recently, in order to prevent the lap belt from slipping up with respect to the abdomen of the occupant, the lower anchor portion of the belt is set outside the seat, and even if the seat is slid back and forth, A structure has been proposed in which the relationship between the abdomen and the lap belt is always kept constant. In addition, recently, the seat may be multi-functional, such as rotating or removing the seat, folding it forward,
In order to cope with such a sheet, it is possible to cope with the suppression of the rise of the lap belt as described above.
A buckle is attached to the outside and the inside of the seat as described in Japanese Patent Application Publication No. H11-27139, the tongue attached to the end of the belt is engaged with the buckle on the outside of the vehicle, and the tongue loosely inserted in the middle of the belt is engaged with the buckle inside the vehicle. A structure has been proposed.

[0004]

However, in such a conventional technique, when both tongues are removed, at least the tongue in the middle of the belt becomes idle, and the tongues interfere with each other. When the engagement between the buckle on the inside of the vehicle and the tongue is released after the engagement between the buckle and the tongue on the outside of the vehicle is released first, the belt winding force by the seat belt winding device The buckle may be damaged by hitting other parts in the vehicle.

The present invention has been made by paying attention to such a conventional technique, and a tongue in the middle of the belt does not play, and an erroneous release procedure can be reliably avoided. An apparatus is provided.

[0006]

According to the first aspect of the present invention,
A seat-side engaging portion is attached to the outside of the vehicle on the side of the seat, and a buckle having a first insertion opening is attached to the inside of the vehicle on the side of the seat. One end of the belt is freely windable via an anchor portion fixed to the vehicle body. The other end of the belt is attached to the other end of the belt, a belt-side engaging portion provided with an engaged portion that engages with the seat-side engaging portion on the lower surface. In the vehicle seat belt device in which the belt-side tongue engaging with the insertion port is loosely inserted, the belt-side engagement portion has a second insertion port on the upper surface capable of engaging with the belt-side tongue. When the belt-side engaging portion and the belt-side tongue are in an engaged state, a releasing means is provided for releasing the engagement between the seat-side engaging portion and the engaged portion in a released state.

According to the first aspect of the present invention, the engagement between the belt-side engaging portion and the seat-side engaging portion is released only when the belt-side engaging portion and the seat-side engaging portion are not engaged. Since it is not performed, a certain release procedure is established and the belt side tongue does not play.

According to a second aspect of the present invention, there is provided the vehicle seat belt device according to the first aspect, wherein the seat-side engaging portion comprises a seat-side tongue, and the belt-side engaging portion includes a belt-side buckle. It is characterized by comprising.

According to the second aspect of the present invention, since the seat-side tongue is attached to the outside of the seat, the belt-side tongue in the middle of the belt cannot be engaged with the outside of the seat. Therefore, no mistake is made in the engagement partner.

According to a third aspect of the present invention, there is provided the vehicle seat belt device according to the second aspect, wherein the direction in which the seat side tongue inserted into the engaged portion is engaged in the belt side buckle. And a second lock lever that rotates in a direction that engages with the belt-side tongue inserted into the second insertion opening, and the second lock lever includes a belt-side tongue and a second lock lever. A release piece is formed to release the seat side tongue and the first lock lever when the two lock levers are engaged.

According to the third aspect of the present invention, when the belt-side tongue and the second lock lever are engaged, the seat-side tongue and the first lock lever are always released. Establish.

According to a fourth aspect of the present invention, in the vehicle seat belt device according to the third aspect, the belt-side tongue is engaged with the first lock lever when the seat-side tongue and the first lock lever are engaged. And a release piece for releasing the second lock lever and the second lock lever.

According to the fourth aspect of the present invention, the engaged portion of the belt-side buckle and the second insertion port are not released unless one of them is engaged, and the other is not released. To release the engagement with the side buckle,
The belt side tongue must be always engaged with the second insertion opening of the belt side buckle. That is, when the belt side buckle is disengaged from the seat side tongue, the belt side tongue is always engaged with the second insertion opening of the belt side buckle. Therefore, when the belt is mounted, first, the engaged portion of the belt-side buckle must be engaged with the seat-side tongue (since the second insertion port is already closed by the belt-side tongue). . When the seat-side tongue is engaged in the engaged portion, the belt-side tongue comes off from the second insertion opening. Then, the released belt-side tongue can be engaged with the seat-side buckle.

According to a fifth aspect of the present invention, there is provided the vehicle seat belt device according to the fourth aspect, wherein the first lock lever and the second lock lever are located on the back side of the first insertion opening and the second insertion opening, respectively. A lock that has a center of rotation near the base end located at a position, and is urged in the protruding direction at the tip end side. The lock engages with the stopper pin in the protruded state to engage the first lock lever and the second lock lever. The engagement state of the lock lever is maintained, and the engagement state with the stopper pin is released by being pushed by the release piece of the other party.

According to the fifth aspect of the present invention, since the first lock lever and the second lock lever are provided with locks which are urged in the protruding direction at the distal ends thereof, the locks are protruded to engage the stopper pins. The engagement between the first lock lever and the second lock lever can be maintained by the engagement, and when the lock is pressed by the counterpart release piece, the engagement between the lock and the stopper pin is released, and the first lock lever is released. And the second lock lever rotates in the release direction.

According to a sixth aspect of the present invention, in the vehicle seat belt device according to the fifth aspect, an inclined surface which is pressed against a stopper pin to move the lock in a releasing direction is formed at a tip of the lock. It is characterized by.

According to the sixth aspect of the present invention, since the inclined surface is formed at the tip of the lock, the lock is simply pressed by the release piece and the inclined surface of the distal end of the lock is pressed against the stopper pin. The first lock lever and the second lock lever are respectively rotated in the release direction by the action of.

According to a seventh aspect of the present invention, there is provided the vehicle seat belt device according to the sixth aspect, wherein each of the seat-side tongue and the belt-side tongue is pulled out of the engaged portion of the belt-side buckle and the second insertion opening. A first slider and a second slider urged in a direction, and when the first slider and the second slider move in the pull-out direction by the urging force, the seat-side tongue and the belt-side tongue are engaged with each other. When pushing out from the second insertion opening and moving in the insertion direction by being pushed by the sheet side tongue and the belt side tongue, the bent part formed at the base end of the first lock lever and the second lock lever is pushed, The first lock lever and the second lock lever are rotated in the engagement direction.

According to the invention described in claim 7, the first slider and the second slider include the first lock lever and the second slider.
By pushing the bent portion formed at the base end of the lock lever, the first lock lever and the second lock lever can be respectively rotated in the engagement direction. Since the first slider and the second slider are urged in the pull-out direction, if the engagement with the seat-side tongue and the belt-side tongue is released, each tongue is engaged by the first slider and the second slider. It is pushed out vigorously out of the portion and the second insertion opening.

According to an eighth aspect of the present invention, a first buckle is attached to the outside of the vehicle and a second buckle is attached to the inside of the vehicle, and one end of the belt is wound via an anchor portion fixed to the vehicle body. The belt is freely supported, and the other end of the belt is
A first tongue engageable with the buckle is attached, a second tongue engageable with the second buckle is loosely inserted in the middle of the belt, and it is recognized that the first tongue has engaged with the first buckle. Only in this case, the second buckle can be engaged with the second tongue.

According to the eighth aspect of the present invention, when it is recognized that the first tang of the belt end is engaged with the first buckle outside the seat vehicle while the structure of the buckle and the tongue is the same as the conventional one. Only (not recognized when the second tang is engaged with the first buckle), the second buckle inside the seat car can be engaged with the second tongue in the middle of the belt, so that the wrong mate or the engagement There is no mistake in the procedure.

According to a ninth aspect of the present invention, in the vehicle seat belt device according to the eighth aspect, a sensor for recognizing an engagement state with the first tongue is provided on the first buckle, and the second buckle is provided with the second buckle. An engagement preventing means for preventing engagement with the tongue is provided, the engagement preventing means is released only when a signal from the sensor is received, and the second tongue can be engaged with the second buckle. I do.

According to the ninth aspect of the present invention, even if the second tongue is mistakenly engaged with the first buckle, the sensor does not recognize the second tongue, so that the remaining first tongue is engaged with the second buckle. In this case, the engagement cannot be performed by the engagement preventing means in the second buckle. Therefore, the occupant can know the mistake of the engagement partner from this. In addition, since the second tongue cannot be engaged with the second buckle before the first tongue is engaged with the first buckle, an error in the engagement procedure does not occur.

According to a tenth aspect of the present invention, a seat-side tongue is attached to the outside of the vehicle on the side of the seat, and a seat-side buckle having a first insertion opening is attached to the inside of the vehicle on the side of the seat. A belt-side buckle having an engaged portion on the lower surface and a second insertion port on the upper surface is attached to the other end of the belt at the other end of the belt. A belt-side tongue that can be engaged in the first insertion opening of the seat-side buckle and the second insertion opening of the belt-side buckle is loosely inserted, and the seat-side tongue is inserted into an engaged portion of the belt-side buckle. , And when one of the engaged portion of the belt-side buckle and the second insertion opening is in the engaged state, the other is in the released state.

According to the tenth aspect of the present invention, since the seat-side tongue is attached to the outside of the seat, the belt-side tongue in the middle of the belt cannot be engaged with the outside of the seat. Therefore, no mistake is made in the engagement partner.
The engaged portion of the belt-side buckle and the second insertion port
If one is not engaged, the other will not be released. To release the engagement between the seat-side tongue and the belt-side buckle, the belt-side tongue must be engaged with the second insertion opening of the belt-side buckle. Must be combined. That is, if the belt-side buckle is disengaged from the seat-side tang, the belt-side tang must be the second buckle of the belt-side buckle.
It is engaged with the insertion slot. Therefore, when the belt is mounted, first, the engaged portion of the belt-side buckle must be engaged with the seat-side tongue (since the second insertion port is already closed by the belt-side tongue). . When the seat-side tongue is engaged in the engaged portion, the belt-side tongue comes off from the second insertion port.
The detached belt-side tongue can be engaged with the seat-side buckle.

As described above, according to the present invention, a fixed release procedure is established and the engagement procedure is not mistaken. In addition, since the lap belt portion of the belt slides back and forth integrally with the seat, it is possible to reliably prevent the lap belt from shifting to the abdomen. In addition, when the belt-side buckle is removed from the seat-side tongue and the belt is stored in the vehicle body, the belt-side tongue in the middle of the belt is engaged in the second insertion opening of the belt-side buckle. The rattling of the belt-side tongue is prevented.

[0027]

Preferred embodiments of the present invention will be described below with reference to the accompanying drawings.

1 to 7 show a first embodiment of the present invention. Reference numeral 1 denotes a rear seat (seat) on the right side of the wagon car, which can be slid forward and backward by a slide rail (not shown), and can be folded forward to enlarge the rear luggage room.

A seat-side tongue 2 as a "seat-side engaging portion" is attached to the outside of the rear seat 1 (outside in the vehicle width direction). Also, on the inside of the car (inside the car width direction),
A seat-side buckle 4 having a first insertion opening 3 is attached. The seat side buckle 4 is provided with a release button (not shown).

The upper end of the belt 5 can be wound up by a retractor (not shown) via an anchor 6 fixed to the vehicle body. Further, a belt-side buckle 7 as a “belt-side engaging portion” is attached to a lower end portion of the belt 5. An engaged portion 8 is formed on the lower surface of the belt-side buckle 7, and a second insertion opening 9 is formed on the upper surface.
Further, a belt-side tongue 10 is freely movably inserted in the middle of the belt 5.

The seat-side tongue 2 can be engaged with the engaged portion 8 of the belt-side buckle 7, and the belt-side tongue 10 can be engaged with the second insertion opening 9. Can also be engaged with the first insertion opening 3 of the seat-side buckle 4.

Next, the internal structure of the belt-side buckle 7 will be described. Inside the outer cover 11 of the belt-side buckle 7, two cases 12a and 12b having a substantially U-shaped cross section are provided.
Are assembled facing each other. A stopper pin 13a is provided on the engaged portion 8 side of the case 12a, and a stopper pin 13b is provided on the second insertion port 9 side of the case 12b. In addition, one case 1
The end of the belt 5 is attached to the upper end 14 of 2a.

Reference numeral 15 is a first lock lever, and reference numeral 1
Reference numeral 6 denotes a second lock lever. In both cases, the engagement holes 2a, 10a of the sheet side tongue 2 and the belt side tongue 10 are provided.
c are provided with pawls 17a and 17b capable of engaging with a. Of the first lock lever 15 and the second lock lever 16, support pieces 18 a and 18 b are formed on both sides near a base end located on the inner side of the engaged portion 8 and the second insertion opening 9. The support pieces 18a, 18b are notched 1 in the cases 12a, 12b.
9a and 19b. The first lock lever 15 and the second lock lever 16 are supported by the support pieces 18.
a, 18b as the “rotation center”, the leading end side in the engagement direction A
And in the release direction B (FIGS. 5 and 6).
reference).

The tip ends of the first lock lever 15 and the second lock lever 16 are provided with coil springs 20a, 20b.
Locks 21a and 21b biased in the protruding direction are provided. The tips of the locks 21a and 21b are pressed against the stopper pins 13a and 13b, and
a, 21b are moved in the release direction B.
2b are respectively formed.

When the locks 21a and 21b are engaged with the stopper pins 13a and 13b in the projected state, the first
The engaged state of the lock lever 15 and the second lock lever 16 is maintained. When the locks 21a, 21b are pushed, the inclined surfaces 22a, 22b of the locks 21a, 21b are pushed and pressed on the stopper pins 13a, 13b, and the locks 21a, 21b are actuated by the action of the inclined surfaces 22a, 22b. It moves in the release direction B, and rotates the first lock lever 15 and the second lock lever 16 in the release direction B.

At the base ends of the first lock lever 15 and the second lock lever 16, long release pieces 23a and 23b extending toward each other are formed. On the opposite side of the release pieces 23a and 23b, a short bent portion 24 is provided.
a and 24b are also formed. The slightly bent distal ends of the release pieces 23a, 23b are connected to the locks 21a, 21b.
And the first lock lever 15 or the second lock lever 15
When one of the lock levers 16 rotates in the release direction B,
The distal ends of the release pieces 23a and 23b on one side push the distal ends of the locks 21a and 21b on the other side.

The inside of the belt-side buckle 7 corresponding to the engaged portion 8 and the second insertion opening 9 is attached by another coil spring 25a, 25b in the pulling-out direction C (see FIGS. 5 and 6). An energized first slider 26 and a second slider 27 are provided. The first slider 26 and the second slider 27 are coil springs 25a, 25
b, the sheet-side tongue 2 and the belt-side tongue 10 are moved to the engaged portion 8 and the second
Push out vigorously outward from the insertion opening 9. When the seat-side tongue 2 and the belt-side tongue 10 are inserted into the engaged portion 8 and the second insertion opening 9, the first slider 2 is used.
6 and the second slider 27 are pushed by the seat-side tongue 2 and the belt-side tongue 10 and move in the insertion direction D (see FIGS. 5 and 6) when the first lock lever 15 and the second lock lever 16 are moved. Bent portions 24a, 2 formed at the base end
4b, the first lock lever 15 and the second lock lever 16 are rotated in the engagement direction A.

Since the belt-side buckle 7 is structured as described above, the engaged portion 8 and the second insertion port 9
Is such that when one is engaged, the other is released. This operation will be described with reference to FIGS. FIG. 5 shows a state where the tongue 2 is engaged with the engaged portion 8. In this state, when the first slider 26 pushes the bent portion 24a of the first lock lever 15, the first lock lever 15 rotates in the engagement direction A,
The pawl 17a is engaged with the engagement hole 2a, so that the sheet side tongue 2 cannot be pulled out. Further, the lock 21a of the first lock lever 15 is engaged with the stopper pin 13a, and the engaged state of the first lock lever 15 is maintained.

When the belt-side tongue 10 is inserted into the second insertion opening 9 from this state, the second slider 27 is pushed by the belt-side tongue 10 and moves in the insertion direction D. In order to push the bent portion 24b at the end, the second lock lever 16 rotates in the engagement direction, the claw 17b of the second lock lever 16 engages with the engagement hole 10a of the belt-side tongue 10, and the lock 21b engages. The engagement with the stopper pin 13b is maintained, and the engagement state of the second lock lever 16 is maintained.

When the second lock lever 16 rotates in the engagement direction A, the tip of the release piece 23b of the second lock lever 16 pushes the tip of the lock 21a of the first lock lever 15. The lock 21a pressed by the release piece 23b is released from the engagement with the stopper pin 13a, and the inclined surface 22a at the tip thereof is released.
Is pushed on the stopper pin 13a. At this time, since the tip of the lock 21a is an inclined surface 22a, the action of the inclined surface 22a
The lock 21a moves in the release direction B, and rotates the entire first lock lever 15 in the release direction B. Accordingly, the engagement between the first lock lever 15 and the seat-side tongue 2 is released. When the engagement is released, the seat-side tongue 2 moves to the first slider 26 urged by the coil spring 25a.
As a result, it is pushed out of the engaged portion 8 to the outside. Next, when the sheet-side tongue 2 is engaged with the engaged portion 8, the engagement of the belt-side tongue 10 is released, and the belt-side tongue 10 is pushed out from the second insertion opening 9. It is.

Next, a description will be given of a method of using the seat belt device according to the present embodiment using the belt buckle 7 having such a structure.

First, in this embodiment, the buckle, not the buckle, is the seat-side tongue 2 attached to the outside of the rear seat 1, so the belt-side tongue 10 loosely inserted into the belt 5 is attached to the rear seat 1. It cannot be engaged outside the vehicle. Therefore, there is no case where the engagement partner is mistaken.

Further, since the belt-side buckle 7 has the above-described structure, the release procedure is not mistaken. The operation of avoiding an error in the release procedure will be described with reference to FIGS. For convenience of explanation, the description will be made from the usage state in which the belt-side buckle 7 is engaged with the seat-side tongue 2 as shown in FIG.

In such a use state, since the belt-side buckle 7 has already been engaged with the seat-side tongue 2, the seat-side tongue 2 in the middle of the belt 5 can be used without error. 4 to reliably restrain the occupant. Since the lap belt 5a of the belt 5 that restrains the occupant in this manner has both ends supported by the rear seat 1, the lap belt 5a slides back and forth integrally with the rear seat 1 and moves to the abdomen of the lap belt 5a. Deviation can be reliably suppressed.

When the belt 5 is to be removed, a release button (not shown) of the seat-side buckle 4 is pressed, and the belt-side tongue 10 is pulled out of the seat-side buckle 4. Since the belt-side buckle 7 does not have a release button, the belt-side buckle 7 cannot be detached from the seat-side tongue 2 alone.

To remove the belt-side buckle 7 from the seat-side tang 2, the belt-side tongue 10 removed from the seat-side buckle 4 is engaged in the second insertion opening 9 of the belt-side buckle 7 (FIG. 2, FIG. 3). Then, the seat-side tongue 2 is pushed out from the engaged portion 8, and the belt-side buckle 7 comes off (see FIG. 4). In this state, the belt 5 is wound up to the vicinity of the anchor portion 6 of the vehicle body.
In the state of 0, the belt-side buckle 7 remains engaged in the second insertion opening 9 so that the belt-side tang 10 is prevented from rattling without play. Since the belt 5 is completely removed from the rear seat 1, the rear seat 1 can be folded forward to expand the rear luggage room.

In the non-use state in which the belt-side buckle 7 is disengaged from the seat-side tang 2, the belt-side tang 10 is always engaged with the second insertion opening 9 of the belt-side buckle 7. Therefore, when re-attaching the belt 5, the seat-side tongue 2 must first be engaged with the engaged portion 8 of the belt-side buckle 7. Then, the second insertion port 9
, The belt-side tongue 10 is disengaged from the seat-side buckle 4. As described above, when the belt 5 is mounted, the operation of engaging the belt-side buckle 7 with the seat-side tongue 2 must be performed first structurally, so that the engagement procedure is not mistaken. Therefore, the caution label conventionally attached in the vehicle interior can be abolished, and the appearance in the vehicle interior is improved.

If only a certain release procedure is to be established, only the release of the engagement between the belt-side tongue 10 and the inside of the second insertion opening 9 has the same configuration as the release button (not shown) of the seat-side buckle 4. May be.

FIG. 8 is a diagram showing a second embodiment of the present invention. In the second embodiment, a first buckle 29 is attached to the outside of the rear seat 28 and a second buckle 30 is attached to the inside of the vehicle. The upper end of the belt 31 is fixed to an anchor portion 32 fixed to the vehicle body.
And is supported by a retractor (not shown) so as to be freely wound. A first tongue 33 engageable with the first buckle 29 is attached to the lower end of the belt 31, and a second tongue 34 engageable with the second buckle 30 is loosely inserted in the middle of the belt 31. ing.

The first buckle 29 is provided with a sensor 35 for recognizing the state of engagement with the first tongue 33, and the second buckle 30 is provided with an engagement for preventing engagement with the second tongue 34. Blocking means 36 is provided. The engagement preventing means 36 and the sensor 35 are electrically connected. The engagement preventing means 36 is released only when a signal from the sensor 35 is received, and the second tongue 34 is released from the second buckle 3.
0 can be engaged.

According to the second embodiment, the structure of the buckle and the tongue is the same as the conventional one, but only when the sensor 35 recognizes that the first tongue 33 is engaged with the first buckle 29 (the first tongue 33). If the second tongue 34 is engaged with the buckle 29, it is not recognized), and the engagement preventing means 36 in the second buckle 30 is released to enable the second tongue 34 to be engaged. Also, there is no possibility that the engagement procedure is mistaken.

In other words, even if the second tongue 34 is mistakenly engaged with the first buckle 29, the sensor 35 does not recognize the second tongue 34. Therefore, even if the remaining first tongue 33 is engaged with the second buckle 30, The engagement cannot be made by the engagement preventing means 36 in the second buckle 30. Therefore, the occupant can know the mistake of the engagement partner from this. In addition, since the second tongue 34 cannot be engaged with the second buckle 30 before the first tongue 33 is engaged with the first buckle 29, an error in the engagement procedure does not occur.

[0053]

According to the first aspect of the present invention, the engagement between the belt-side engaging portion and the seat-side engaging portion is released by the engagement between the belt-side engaging portion and the seat-side engaging portion. Otherwise, a certain release procedure is established and the belt side tongue does not play.

According to the second aspect of the present invention, since the seat-side tongue is attached to the outside of the seat, the belt-side tongue in the middle of the belt cannot be engaged with the outside of the seat. Therefore, no mistake is made in the engagement partner.

According to the third aspect of the present invention, there is provided a fixed releasing procedure in which the seat-side tongue and the first lock lever are always released when the belt-side tongue and the second lock lever are engaged. Establish.

According to the fourth aspect of the present invention, the first insertion port and the second insertion port of the belt-side buckle are not released unless one of them is in the engaged state. To release the engagement state with the side buckle, the belt side tongue must be always engaged with the second insertion opening of the belt side buckle. That is, when the belt side buckle is disengaged from the seat side tongue, the belt side tongue is always engaged with the second insertion opening of the belt side buckle. Therefore, when attaching a belt, first, the first insertion opening of the belt-side buckle must be engaged with the seat-side tongue (since the second insertion opening is already closed by the belt-side tongue). . When the seat-side tongue is engaged with the first insertion opening, the belt-side tongue is disengaged from the second insertion opening. Then, the detached belt-side tongue can be engaged with the seat-side buckle.

According to the fifth aspect of the present invention, since the locks urged in the protruding direction are provided at the distal end portions of the first lock lever and the second lock lever, the locks are protruded to engage the stopper pins. The engagement between the first lock lever and the second lock lever can be maintained by the engagement, and when the lock is pressed by the counterpart release piece, the engagement between the lock and the stopper pin is released, and the first lock lever is released. And the second lock lever rotates in the release direction.

According to the sixth aspect of the present invention, since the inclined surface is formed at the tip of the lock, the lock is simply pressed by the release piece and the inclined surface of the distal end of the lock is pressed against the stopper pin. The first lock lever and the second lock lever are respectively rotated in the release direction by the action of.

According to the seventh aspect of the present invention, the first slider and the second slider are the first lock lever and the second slider.
By pushing the bent portion formed at the base end of the lock lever, the first lock lever and the second lock lever can be respectively rotated in the engagement direction. Since the first slider and the second slider are urged in the pull-out direction, when the engagement with the seat-side tongue and the belt-side tongue is released, each tongue is first inserted by the first slider and the second slider. It is pushed out vigorously out of the mouth and the second insertion opening.

According to the eighth aspect of the present invention, when it is recognized that the first tang at the belt end is engaged with the first buckle outside the seat vehicle while the structure of the buckle and the tongue is the same as the conventional one. Only (not recognized when the second tang is engaged with the first buckle), the second buckle inside the seat car can be engaged with the second tongue in the middle of the belt, so that the wrong mate or the engagement There is no mistake in the procedure.

According to the ninth aspect of the present invention, even if the second tongue is mistakenly engaged with the first buckle, the sensor does not recognize the second tongue, so that the remaining first tongue is engaged with the second buckle. In this case, the engagement cannot be performed by the engagement preventing means in the second buckle. Therefore, the occupant can know the mistake of the engagement partner from this. In addition, since the second tongue cannot be engaged with the second buckle before the first tongue is engaged with the first buckle, an error in the engagement procedure does not occur.

According to the tenth aspect, since the seat-side tongue is attached to the outside of the seat, the belt-side tongue in the middle of the belt cannot be engaged with the outside of the seat. Therefore, no mistake is made in the engagement partner.
The engaged portion of the belt-side buckle and the second insertion port
If one is not engaged, the other will not be released. To release the engagement between the seat-side tongue and the belt-side buckle, the belt-side tongue must be engaged with the second insertion opening of the belt-side buckle. Must be combined. In other words, if the belt-side buckle is disengaged from the seat-side tang, the belt-side tang must be the second buckle of the belt-side buckle.
It is engaged with the insertion slot. Therefore, when the belt is mounted, first, the engaged portion of the belt-side buckle must be engaged with the seat-side tongue (since the second insertion port is already closed by the belt-side tongue). . When the seat-side tongue is engaged in the engaged portion, the belt-side tongue comes off from the second insertion port.
The detached belt-side tongue can be engaged with the seat-side buckle.

As described above, according to the present invention, a fixed release procedure is established, and the engagement procedure is not mistaken. In addition, since the lap belt portion of the belt slides back and forth integrally with the seat, it is possible to reliably prevent the lap belt from shifting to the abdomen. In addition, when the belt-side buckle is removed from the seat-side tongue and the belt is stored in the vehicle body, the belt-side tongue in the middle of the belt is engaged in the second insertion opening of the belt-side buckle. The rattling of the belt-side tongue is prevented.

[Brief description of the drawings]

FIG. 1 is a perspective view of a seat showing a use state of a seat belt device according to a first embodiment of the present invention.

FIG. 2 is a perspective view of the seat showing a state immediately before the belt-side tongue of FIG. 1 is engaged with a second insertion opening of the belt-side buckle.

FIG. 3 is a perspective view of the seat showing a state where the belt-side tongue of FIG. 2 is engaged with a second insertion opening of the belt-side buckle.

FIG. 4 is a perspective view of the seat showing a state where a belt-side buckle of FIG. 3 is removed from a seat-side tongue.

FIG. 5 is a cross-sectional view of the belt-side buckle showing a state in which a seat-side tongue is engaged with a first insertion port of FIG. 1;

FIG. 6 is a cross-sectional view of the belt-side buckle showing a state in which the belt-side tongue is engaged with the second insertion port of FIG. 3;

7 is an exploded view showing the internal structure of the belt-side buckle shown in FIGS. 5 and 6. FIG.

FIG. 8 is a perspective view of a seat showing a use state of a seat belt device according to a second embodiment of the present invention.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 rear seat (seat) 2 seat-side tongue (seat-side engaging portion) 3 first insertion opening 4 seat-side buckle 5, 31 belt 6, 32 anchor portion 7 belt-side buckle (belt-side engaging portion) 8 engaged portion 9 2nd insertion opening 10 Belt side tongue 13a, 13b Stopper pin 15 1st lock lever 16 2nd lock lever 18a, 18b Support piece (rotation center) 21a, 21b Lock 22a, 22b Inclined surface 23a, 23b Release piece 26 1st Slider 27 Second slider 28 Seat 29 First buckle 30 Second buckle 33 First tongue 34 Second tongue 35 Sensor 36 Engagement prevention means A Engagement direction B Release direction C Pullout direction D Insertion direction

Claims (10)

[Claims] A buckle having a first insertion opening is attached to a seat side outside of the vehicle on the vehicle side, and a buckle having a first insertion opening is mounted on the seat side of the vehicle inside, and one end of the belt is provided with an anchor portion fixed to the vehicle body. At the other end of the belt, a belt-side engaging portion having an engaged portion that engages with the sheet-side engaging portion on the lower surface is attached, and in the middle of the belt, In the vehicle seat belt device in which a belt-side tongue engaging with a first insertion opening of the buckle is loosely inserted, a second insertion opening engageable with the belt-side tongue is provided on an upper surface of the belt-side engagement portion. And a releasing means for releasing the engagement between the seat-side engaging portion and the engaged portion when the belt-side engaging portion and the belt-side tongue are engaged. Vehicle seat belt device. 2. The vehicle seatbelt device according to claim 1, wherein the seat-side engaging portion is constituted by a seat-side tongue, and the belt-side engaging portion is constituted by a belt-side buckle. A seat belt device for a vehicle, comprising: 3. The vehicle seat belt device according to claim 2, wherein the first lock rotates in a direction in which the seat side tongue inserted into the engaged portion is engaged in the belt side buckle. A lever and a second lock lever that rotates in a direction that engages with the belt-side tongue inserted into the second insertion opening, and the second lock lever has the belt-side tongue and the second lock lever.
A seat belt device for a vehicle, wherein a release piece is formed to release the seat side tongue and the first lock lever when the lock lever is engaged. 4. The vehicle seat belt device according to claim 3, wherein when the seat side tongue and the first lock lever are engaged with the first lock lever, the belt side tongue and the second lock lever are engaged. A vehicle seat belt device comprising a release piece for releasing the vehicle. 5. The vehicle seat belt device according to claim 4, wherein the first lock lever and the second lock lever each include:
A lock having a center of rotation near the base end located on the back side of the first insertion opening and the second insertion opening, and being urged in the protruding direction on the distal end side, wherein the lock is in a protruding state and has a stopper pin. And the engagement state of the first lock lever and the second lock lever is maintained, and the engagement state with the stopper pin is released by being pushed by the release piece of the other party. apparatus. 6. The vehicle seat belt device according to claim 5, wherein an inclined surface which is pressed against a stopper pin to move the lock in a releasing direction is formed at a tip end of the lock. Seat belt device. 7. The vehicle seat belt device according to claim 6, wherein the engagement portion of the belt-side buckle and the second insertion opening are urged in the pull-out direction of the seat-side tongue and the belt-side tongue. A first slider and a second slider;
The slider and the second slider push the sheet-side tongue and the belt-side tongue from the first insertion port and the second insertion port when moving in the pull-out direction by the urging force, and are pushed by the sheet-side tongue and the belt-side tongue. When moving in the insertion direction, a bent portion formed at the base end of the first lock lever and the second lock lever is pushed to rotate the first lock lever and the second lock lever in the engagement direction. Vehicle seat belt device. 8. A first buckle is attached to the outside of the vehicle and a second buckle is attached to the inside of the vehicle. One end of the belt is supported so as to be able to be wound up via an anchor portion fixed to the vehicle body. A first tongue that can be engaged with the first buckle is attached to the other end of the belt, a second tongue that can be engaged with the second buckle is loosely inserted in the middle of the belt, and the first tongue is inserted into the first buckle. The vehicle seatbelt device, wherein the second buckle can be engaged with the second tongue only when the engagement is recognized. 9. The vehicle seat belt device according to claim 8, wherein a sensor for recognizing an engagement state with the first tongue is provided on the first buckle, and an engagement with the second tongue is provided on the second buckle. An engagement preventing means is provided for preventing the second tongue from being released only when a signal from the sensor is received.
A vehicle seatbelt device capable of engaging with a buckle. 10. A seat-side tongue is attached to the outside of the vehicle on the side of the seat, and a seat-side buckle having a first insertion port is attached to the inside of the vehicle on the side of the seat.
The other end of the belt is provided with an engaged portion on a lower surface thereof, and the second end of the belt is rotatably supported via an anchor portion fixed to the vehicle body.
A belt side buckle with an insertion port on the top is attached,
In the middle of the belt, a belt-side tongue that can be engaged in a first insertion opening of the seat-side buckle and a second insertion opening of the belt-side buckle is loosely inserted, and the seat-side tongue is covered by the belt-side buckle. The engagement portion can be engaged into the engagement portion, the engaged portion of the belt-side buckle and the second insertion port,
A seat belt device for a vehicle, characterized in that when one is engaged, the other is released.