JP7140578B2 - Buckle device and seat belt device provided with the same - Google Patents

Description

The present invention relates to a buckle device and a seatbelt device having the same.

In the three-point seat belt system, the seat belt is divided into a shoulder belt that runs diagonally in front of the occupant's chest from the upper part of one of the left and right sides to the lower part of the other side, and a seat belt that extends from one of the left and right sides to the other side on the waist. By inserting and engaging the tongue connected to the shoulder belt and the waist belt with the buckle fixed to the vehicle body, the chest and waist of the occupant are restrained, and in case of an emergency such as a vehicle collision. To prevent an occupant from being thrown forward at times.

In a three-point seatbelt system with such a configuration, the occupant with inertia tends to move forward in a collision, so the slack in the belt should be removed and the seatbelt buckle should be buckled when the vehicle suddenly decelerates. A retractable pretensioner is known (see Patent Document 1, for example).

In addition, as a three-point seat belt device, the seat belt is separated at the buckle portion during a collision to enable forward movement of the buckle position, thereby separating the waist belt (lap belt) and the shoulder belt (shoulder belt). There is known a document related to a separable buckle (split buckle) that reduces the belt tension acting on the chest without reducing the waist restraint force (see Non-Patent Document 1).

WO2008/155942

Bengt Pipkorn, FranciscoJ. Ｌoｐｅｚ-Ｖａｌｄｅｓ，Ｏｓｃａｒ Ｊｕｓｔｅ-Ｌｏｒｅｎｔｅ， Ｒｉｃａｒｄｏ Ｉｎｓａｕｓｔｉ， Ｃｈｒｉｓｔｅｒ Ｌｕｎｄｇｒｅｎ ＆ Ｃｅｃｉｌｉａ Ｓｕｎｎｅｖaｎｇ （２０１６）“Ａｓｓｅｓｓｍｅｎｔ ｏｆ ａｎ ｉｎｎｏｖａｔｉｖｅ ｓｅａｔ ｂｅｌｔ ｗｉｔｈ ｉｎｄｅｐｅｎｄｅｎｔ ｃｏｎｔｒｏｌ ｏｆ ｔｈｅ ｓｈｏｕｌｄｅｒ ａｎｄ ｌａｐ ｐｏｒｔｉｏｎｓ ｕｓｉｎｇ ＴＨＯＲ ｔｅｓｔｓ， ｔｈｅ ＴＨＵＭＳ ｍｏｄｅｌ， ａｎｄ ＰＭＨＳ ｔｅｓｔ”，Ｔｒａｆｆｉｃ Injury Prevention, 17: Sup1, pp. 124-130

By the way, if the occupant is excessively restrained by the seat belt, the burden on the ribs, the lower part of the ribs, the abdomen, etc. increases. For this reason, seat belt devices are required to reduce the load on the occupant by quickly restraining the skeleton of the human body, which is difficult to deform. That is, in a three-point seat belt system, it is desired that the seat belt effectively restrains the clavicle and the ilium.

However, in the pretensioner disclosed in Patent Document 1, the buckle is pulled in along the direction of inclination of the wire to which the buckle is attached, and more efficient restraint of the seat belt is required. In addition, the seat belt device described in Non-Patent Document 1 requires a complicated mechanism for enabling the separation of the waist belt and the shoulder belt.

In consideration of the above circumstances, the present invention provides a buckle device and a seatbelt device having the same that can improve the performance of restraining an occupant by a seatbelt while reducing the burden on the lower ribs and abdomen of an occupant in the event of a vehicle collision. intended to provide

The present invention is achieved by the following configurations.
(1) a buckle main body to which a tongue provided on a seat belt can be attached;
a buckle stay that supports the buckle main body;
A buckle device comprising
The buckle stay is a buckle device configured such that the buckle main body undergoes a first turning movement in a direction away from the occupant normally seated, and then a second turning movement in a direction approaching the occupant. .
(2) A seatbelt device comprising the buckle device according to (1).

According to the buckle device and the seatbelt device of the present invention, in an emergency, the buckle main body undergoes a first turning movement in a direction away from the occupant normally seated, and then a second turning movement in a direction approaching the occupant. Since the waist belt can be moved and stretched over the anterior superior iliac spine, it is possible to improve the performance of restraining the occupant by the seat belt while reducing the burden on the lower part of the ribs and abdomen in the event of a vehicle collision. .

BRIEF DESCRIPTION OF THE DRAWINGS It is a side view which shows the seatbelt apparatus with which the buckle apparatus of 1st Embodiment of this invention was incorporated. FIG. 2 is a view corresponding to FIG. 1 after the buckle stay is driven by the drive mechanism of the buckle device; FIG. 4 is a side view showing the buckle device in a state before the buckle stay is driven; FIG. 4 is a side view showing the buckle device in a state in which the buckle stay is in the process of being driven; FIG. 11 is a side view showing the buckle device in a state where the buckle stay has been completely driven; It is a side view showing a seat belt device incorporating a buckle device of a second embodiment of the present invention. 5 is a view corresponding to FIG. 4 after the buckle stay is driven by the drive mechanism of the buckle device; FIG. It is a side view showing the buckle device of the 1st modification with which a drive mechanism differs, (a) shows the state before a buckle stay is driven, and (b) shows the state where the buckle stay has completed driving. FIG. 11 is a side view showing a second modified buckle device with a different drive mechanism, where (a) shows the state before the buckle stay is driven, and (b) shows the state after the buckle stay has been driven. It is a side view showing the buckle device of the 3rd modification from which a drive mechanism differs. FIG. 11 is a side view showing a fourth modification of the buckle device that drives the buckle stay so that the buckle main body draws another movement trajectory.

Hereinafter, each embodiment of the three-point seat belt device of the present invention will be described with reference to the drawings.

(First embodiment)
FIG. 1 is a side view of a three-point seat belt device 30 of the present embodiment in a worn state. As shown in FIG. 1, the seatbelt device 30 includes a seatbelt 31, a through anchor 20 provided on the wall of the vehicle interior and folding back the seatbelt 31 near the shoulder of the occupant M, and below the through anchor 20. a retractor 22 for winding one end of the seat belt 31; a lap anchor 23 for fixing the other end of the seat belt 31 to the vehicle body; a buckle device 40 to which a tongue 32 attached to the seat belt 31 can be attached; Mainly provide

The seat belt 31 extends diagonally from the upper part of one of the left and right sides of the occupant M seated on the seat 25 (the upper left part of the occupant M in the figure) to the lower part of the other side, from the shoulder Ms to the waist Mw through the front of the chest. It has a shoulder belt 31A and a waist belt 31B that extends from one of the left and right sides (the left side of the occupant M in the example of the figure) to the other side and spans both sides of the occupant M on the waist Mw, and the shoulder belt 31A and the waist belt 31B is formed in a belt shape with one continuous line. The shoulder belts 31A are guided by the through anchors 20, and are adapted to fit well from the shoulders Ms of the occupant M to the chest. The tongue 32 has an insertion hole 32 a through which the seat belt 31 can be inserted, and is movably provided on the seat belt 31 . Also, the tongue 32 is attached to the buckle device 40 when the belt is attached, so that the tongue 32 divides the seat belt 31 into the shoulder belt 31A and the waist belt 31B.
As the occupant M in this embodiment, an internationally standardized side impact dummy (World Side Impact Dummy: WorldSID) AM50 (50th percentile of American adult males) is used, but even if other dummies are applied good.

3A, the buckle device 40 includes a buckle main body 41 to which the tongue 32 can be attached, a buckle stay 50 that supports the buckle main body 41, and a drive mechanism that drives the buckle stay 50 in an emergency. 60 and.

The buckle stay 50 includes a first link 51 connected to the buckle body portion 41 and a second link 51 connected to the first link 51 and rotatably attached to a first fixing portion 52 provided on the vehicle body or the seat 25 . It has a link 53 and a second fixing portion 54 provided on the vehicle body or seat 25 and supporting the first link 51 movably along its longitudinal direction and rotatably.

Specifically, the first fixing portion 52 and the second fixing portion 54 of the present embodiment are configured by shaft members, and the first link 51 and the second link 53 are attached by a connecting shaft 55 so as to be relatively rotatable. It is The first link 51 is formed longer than the second link 53, and the first link 51 is formed with an elongated hole 56 for guiding the second fixing portion 54 along its longitudinal direction.

In the present embodiment, the first fixing portion 52 and the second fixing portion 54 are provided on the seat frame cover 28 arranged laterally of the seat back 26 and the seat cushion 27 that constitute the seat 25. However, the present invention is not limited to this, and may be provided directly on the seat back 26 or the seat cushion 27, or may be provided on a member on the vehicle body side.

Further, the drive mechanism 60 includes a plurality of balls 62 driven by the gas pressure of the gas generator 61 generated in an emergency, a tube 63 accommodating the plurality of balls 62, and a shaft member that is the second fixing portion 54. It is a pretensioner provided with a pinion 64 that rotates integrally with the second link 53 by meshing with the ball 62 .

Therefore, the drive mechanism 60 rotates the second link 53 around the first fixed portion 52 and moves and rotates the first link 51 with respect to the second fixed portion 54 in an emergency. By driving a certain buckle stay 50, the buckle main body part 41 performs a first turning movement in a direction away from the occupant M normally seated, and then a second turning movement in a direction approaching the occupant M.

Specifically, in an emergency, the drive mechanism 60 drives the buckle stay 50 so that the angle θ between the first link 51 and the second link 53 temporarily becomes 180° (see FIG. 3B). Then, the buckle body 42 is first pivoted upward and forward, and then downward and rearward second pivoted (see FIG. 3C). That is, the first link 51 and the second link 53 change from the bent state to the linearly extended state, and then bend in opposite directions so that the angle θ increases.
In FIGS. 3A to 3C, reference character T1 represents the movement trajectory of the buckle _main body 41 driven by the drive mechanism 60, and reference character T2 represents the movement trajectory of the connecting _shaft 55. As shown in FIG.

Therefore, in an emergency, that is, when a vehicle collision is detected by a collision sensor or the like (not shown), high-pressure gas injected from the gas generator 61 is supplied into the tube 63 to move the ball 62 inside the tube 63. , the pinion 64 is rotated. As a result, the second link 53 rotates together with the pinion 64, and the first link 51 and the second link 53 temporarily move linearly relative to each other. At this time, the buckle main body 41 pivots upward and forward together with the tongue 32 . Further, when the second link 51 rotates, the buckle main body 41 pivots downward and rearward together with the tongue 32 . Therefore, the buckle stay 50 causes the buckle main body 41 to move downward compared to the state before the drive mechanism 60 is driven, while in the longitudinal direction of the vehicle, the buckle stay 50 causes the buckle body 41 to move backward by the amount of forward movement. ing. That is, the buckle main body portion 41 after driving does not change significantly in the longitudinal direction of the vehicle, and in the present embodiment, is positioned further forward than before driving.

In addition, since the buckle stay 50 once turns upward and forward, the insertion hole 32a of the tongue 32, which is the boundary between the shoulder belt 31A and the waist belt 31B, is once lifted above the ilium Mi and hooks the ilium Mi. . Thereafter, the buckle stay 50 pivots downward and rearward, so that the waist belt 31B is pulled downward and rearward while being stretched over the anterior superior iliac spine (ASIS) Mia. The iliac Mi is a flat portion that occupies the upper part of the hipbone that constitutes the pelvis, and the anterior superior iliac spine Mia refers to a protrusion at the front edge of the iliac crest.

In this state, in the event of a vehicle collision, the occupant M trying to move forward is restrained by the waist belt 31B stretched over the anterior superior iliac spine Mia, and the waist belt 31B digs into the abdomen of the occupant M. is prevented. In addition, since the buckle main body 41 does not move significantly in the longitudinal direction of the vehicle when the drive is completed, the burden on the lower part of the rib can be reduced.

Further, as shown in FIG. 1, even when the waist belt 31B passes through the abdomen of the occupant M due to the physique and sitting posture of the occupant M, the buckle stay 50 once turns upward and forward. The waist belt 31B can be easily moved from the position where the abdomen is restrained to the position where it is stretched over the anterior superior iliac spine Mia.

As a result, in the present embodiment, it is possible to improve the performance of restraining the occupant by the seat belt while reducing the burden on the lower part of the ribs and abdomen in the event of a vehicle collision.

(Second embodiment)
Next, a seatbelt device according to a second embodiment will be described with reference to FIGS. 4 and 5. FIG. Constituent elements that are the same as or correspond to those of the first embodiment are denoted by the same reference numerals, and explanations thereof are omitted or simplified.

As shown in FIG. 4, one end of an extension belt 31C having a predetermined length is wound around the insertion hole 32a of the tongue 32 in the second embodiment. The other end of the extension belt 31C is inserted through one insertion hole 35a of the intermediate buckle 35, the seat belt 31 is inserted through the other insertion hole 35b of the intermediate buckle 35, and the shoulder belt 31A. and the waist belt 31B.

As a result, in this embodiment, as shown in FIG. 5, the drive mechanism 60 drives the buckle stay 50 configured by the link mechanism, so that the intermediate buckle 35 is located on the ilium Mi when viewed from the front of the vehicle. It can be positioned forward. From this state, the buckle stay 50 further moves downward and rearward, so that the waist belt 31B is stretched over the anterior superior iliac spine Mia. Since 31A more reliably restrains the occupant M with the clavicle and ilium, it is possible to reduce the burden on the ribs and the lower part of the ribs. As a result, it is possible to further improve the occupant restraint performance by reducing the chest deflection of the occupant M.
Other configurations and actions are the same as those of the first embodiment.

Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and can be modified, improved, etc. as appropriate.

In the above embodiment, a pretensioner that drives a pinion with a ball is used as the drive mechanism 60, but the drive mechanism 60 of the present invention is not limited to this. For example, as in the first modification shown in FIG. 6, the drive mechanism 60A may be a pretensioner with a rack and pinion. That is, the drive mechanism 60A is provided around a rack 71 that is driven by the gas pressure of the gas generator 70 generated in an emergency and a shaft member that is the first fixing portion 52, and meshes with the rack 71 to operate the second link. 53 and a pinion 72 that rotates integrally with the pretensioner.

Also, as in a second modification shown in FIG. 7, the drive mechanism 60B may be a pretensioner having a wire as a retracting member. That is, the driving mechanism 60B includes a piston 81 that is operated by the gas pressure of the gas generator 80 generated in an emergency, a cylinder 82 that slidably accommodates the piston 81, and a first link 51 and a second link 53 that are connected. A pretensioner may be provided with a wire 83 that connects the connection shaft 55 that is connected to the piston 81 and that is pulled in by the piston 81 in an emergency.

Although not shown, the wire 83 may be provided with a return prevention mechanism that prevents the wire 83 from moving in the cylinder 82 in a direction opposite to the retraction direction by the piston 81 in an emergency. As a result, it is possible to more reliably prevent the buckle stay 50 that constitutes the link mechanism from being driven in the reverse direction.
Moreover, the mechanism for preventing the buckle stay 50 from being driven in the reverse direction may be provided in either of the drive mechanisms 60 and 60A.

Further, as in the third modification shown in FIG. 8, the drive mechanism 60C rotates the shaft member, which is the first fixing portion 52, either directly or indirectly via a gear or the like, thereby causing the second link 53 to rotate. may be configured by a motor 90 that rotates integrally with and drives the buckle stay 50 that is a link mechanism.

Further, the present invention is provided with load measuring means for measuring the belt load acting on the seat belt. 60 may be configured to stop driving. Normally, after the waist belt 31B is stretched over the anterior superior iliac spine Mia by driving the drive mechanism 60, the belt load gradually increases. However, when the drive mechanism 60 is driven, the waist belt 31B may come off the anterior superior iliac spine Mia of the occupant M depending on the physique and sitting posture of the occupant M. It is desirable to stop the driving so as not to increase the belt load of the waist belt 31B. Therefore, the driving of the drive mechanism 60 may be stopped when the belt load becomes lower than the first threshold value.

Further, the present invention comprises a load measuring means for measuring the belt load acting on the seat belt, and stops driving the link mechanism in an emergency when the belt load when the seat belt is worn is higher than the second threshold value. may That is, when the seat belt is worn and the belt load is higher than the second threshold, it can be determined that the waist belt 31B is already stretched over the anterior superior iliac spine Mia. , it is also possible to control not to drive the link mechanism in an emergency.

In the above-described embodiment, the buckle stay 50 is driven so as to draw _a trajectory T1 such that the buckle main body 41 makes the first upward and forward turning movement, and then the second downward and rearward turning movement. However, the present invention is not limited to this. In other words, the first turning movement may move upward from the initial position, and the second turning movement may move downward after the first turning movement. I wish I had.
Further, the buckle stay 50 is not limited to the link mechanism of the above-described embodiment, and may be configured by another mechanism as long as it moves the buckle body portion 41 in this way.

Furthermore, the present invention only requires that the buckle main body 41 moves downward from the position before driving. For example, as shown in FIG. 9, the buckle stay 50 draws _a trajectory T1 such that it moves forward and backward in the process of the buckle body 41 moving downward (that is, when the buckle body 41 is properly seated). a first pivotal movement forward and downward away from the occupant M who is standing, followed by a second pivotal movement rearward and downward toward the occupant M).

Furthermore, in the above embodiment, the seat belt device 30 including the buckle device 40 is applied to the front seat of the driver's seat or the front passenger seat, but the present invention may be applied to the rear seat.

As described above, this specification discloses the following matters.
(1) a buckle main body to which a tongue provided on a seat belt can be attached;
a buckle stay that supports the buckle main body;
a drive mechanism for driving the buckle stay in an emergency;
A buckle device comprising
The buckle stay is a buckle device configured such that the buckle main body undergoes a first turning movement in a direction away from the occupant normally seated, and then a second turning movement in a direction approaching the occupant. .
According to this configuration, in an emergency, the buckle main body is first turned away from the normally seated occupant, and then second turned toward the occupant to raise the waist belt. Since it can be stretched over the anterior iliac spine, it is possible to reduce the burden on the lower ribs and abdomen and improve the restraint performance of the occupant by the seat belt in the event of a vehicle collision.

(2) The buckle device according to (1), wherein the first pivotal movement of the buckle main body moves upward from an initial position.
According to this configuration, the buckle main body is moved upward from the initial position in an emergency. It can be securely hung over bone spurs.

(3) The buckle device according to (2), wherein the second turning movement of the buckle main body moves downward after the first turning movement.
According to this configuration, in an emergency, the buckle body can be pivoted upward and then pivoted downward so that the waist belt can be stretched over the anterior superior iliac spine. , the restraint performance of the occupant by the seat belt can be improved while reducing the burden on the lower ribs and abdomen.

(4) The buckle stay includes a first link connected to the buckle main body, and a second link connected to the first link and rotatably attached to a first fixing portion provided on the vehicle body or the seat. A link mechanism having a link and a second fixing portion provided on the vehicle body or the seat and supporting the first link movably and rotatably along its longitudinal direction,
The drive mechanism rotates the second link around the first fixing portion and moves and rotates the first link with respect to the second fixing portion in the event of an emergency, thereby The buckle device according to any one of (1) to (3), wherein the second turning movement is performed after the first turning movement.
According to this configuration, in an emergency, the buckle main body portion can be moved to the second turning movement after the first turning movement, and the waist belt can be stretched over the anterior superior iliac spine, without using a complicated mechanism. In the event of a vehicle collision, the restraint performance of the occupant by the seat belt can be improved while reducing the burden on the lower ribs and abdomen.

(5) In the event of an emergency, the drive mechanism drives the link mechanism so that the angle formed by the first link and the second link temporarily becomes 180°, thereby moving the buckle main body. The buckle device according to (4), which is moved downward and rearward after being moved upward and forward.
According to this configuration, in an emergency, the buckle main body is moved upward and forward and then downward and rearward. Since the seat belt can be stretched over the anterior superior iliac spine, it is possible to further improve the restraint performance of the occupant by the seat belt while reducing the burden on the lower ribs and abdomen.

(6) the second fixing portion is a shaft member;
The buckle device according to (4) or (5), wherein the first link has an elongated hole for guiding the shaft member along its longitudinal direction.
According to this configuration, the link mechanism can be configured with a simple structure.

(7) the tongue is provided with an extension belt attached with an intermediate buckle through which the seat belt is inserted;
The buckle device according to any one of (4) to (6), wherein the intermediate buckle overlaps the ilium of the occupant when viewed from the front of the vehicle when the link mechanism is driven in the emergency.
According to this configuration, the shoulder belt is restrained by the clavicle and the ilium in an emergency, so that the burden on the lower ribs can be further reduced.

(8) The driving mechanism is
a plurality of balls driven by the gas pressure of a gas generator generated in an emergency;
a tube containing a plurality of balls;
a pinion that is provided around the shaft member that is the second fixing portion and that rotates integrally with the second link by meshing with the ball;
The buckle device according to any one of (4) to (7), which is a pretensioner comprising
According to this configuration, the existing pretensioner structure can be suitably used as the drive mechanism.

(9) The driving mechanism is
a rack driven by the gas pressure of a gas generator generated in an emergency;
a pinion that is provided around the shaft member that is the first fixing portion and that rotates integrally with the second link by meshing with the rack;
The buckle device according to any one of (4) to (7), which is a pretensioner comprising
According to this configuration, the existing pretensioner structure can be suitably used as the drive mechanism.

(10) The driving mechanism is
A piston operated by the gas pressure of the gas generator generated in an emergency;
a cylinder slidably housing the piston;
a connecting shaft connecting the first link and the second link, and a retracting member that connects the piston and is retracted by the piston in an emergency;
The buckle device according to any one of (4) to (7), which is a pretensioner comprising
According to this configuration, the existing pretensioner structure can be suitably used as the drive mechanism.

(11) According to (10), the retracting member is provided with a return prevention mechanism that prevents the retracting member from moving in the cylinder in a direction opposite to the retraction direction by the piston in the emergency. Buckle device.
According to this configuration, the return prevention mechanism can more reliably prevent the link mechanism from being driven in the reverse direction.

(12) The driving mechanism is
The buckle device according to any one of (4) to (7), wherein the motor drives the link mechanism by rotating the second link around the first fixing portion.
According to this configuration, the motor can be suitably used as the drive mechanism.

(13) load measuring means for measuring a belt load acting on the seat belt;
The buckle according to any one of (4) to (12), which stops driving the link mechanism when the belt load drops below a first threshold value while the link mechanism is being driven in an emergency. Device.
According to this configuration, even if the waist belt deviates from the anterior superior iliac spine and restrains the abdomen due to the posture, physique, or movement of the occupant in an emergency, further restraint can be stopped.

(14) load measuring means for measuring a belt load acting on the seat belt;
The buckle device according to any one of (4) to (13), which stops driving the link mechanism in the event of an emergency when the belt load when the seat belt is worn is higher than a second threshold.
According to this configuration, the drive of the link mechanism can be stopped when it can be determined in advance that the waist belt can be stretched over the anterior superior iliac spine.

(15) A seatbelt device comprising the buckle device according to any one of (1) to (14).
According to this configuration, it is possible to provide a seatbelt device capable of improving restraint performance of an occupant by the seatbelt while reducing the burden on the lower ribs and the abdomen in the event of a vehicle collision without using a complicated mechanism. can be done.

30 seat belt device 31 seat belt 31A shoulder belt 31B waist belt 31C extension belt 32 tongue 32a insertion hole 35 intermediate buckle 40 buckle device 41 buckle body 50 buckle stay 51 first link 52 first fixing portion 53 second link 54 second Fixed portion 55 Connecting shaft 56 Long holes 60, 60A, 60B, 60C Drive mechanism M Occupant Mi Ilium Mia Anterior superior iliac spine Ms Shoulder Mw Lumbar

Claims (11)

A buckle main body to which a tongue provided on the seat belt can be attached,
a buckle stay that supports the buckle main body;
a drive mechanism for driving the buckle stay in an emergency;
A buckle device comprising
The buckle stay is configured such that the buckle main body undergoes a first turning movement in a direction away from the normally seated occupant, and then a second turning movement in a direction approaching the occupant ,
The buckle stay includes a first link connected to the buckle main body, a second link connected to the first link and rotatably attached to a first fixing portion provided on the vehicle body or the seat, a link mechanism having a second fixing portion provided on the vehicle body or the seat and supporting the first link so as to be movable along its longitudinal direction and rotatable;
The drive mechanism rotates the second link around the first fixing portion and moves and rotates the first link with respect to the second fixing portion in the event of an emergency, thereby configured to perform said second pivoting movement after said first pivoting movement;
The tongue is provided with an extension belt attached with an intermediate buckle through which the seat belt is inserted,
The intermediate buckle is a buckle device that overlaps the ilium of the occupant when viewed from the front of the vehicle when the link mechanism is driven in the emergency . A buckle main body to which a tongue provided on the seat belt can be attached,
a buckle stay that supports the buckle main body;
a drive mechanism for driving the buckle stay in an emergency;
A buckle device comprising
The buckle stay is configured such that the buckle main body undergoes a first turning movement in a direction away from the normally seated occupant, and then a second turning movement in a direction approaching the occupant,
The buckle stay includes a first link connected to the buckle main body, a second link connected to the first link and rotatably attached to a first fixing portion provided on the vehicle body or the seat, a link mechanism having a second fixing portion provided on the vehicle body or the seat and supporting the first link so as to be movable along its longitudinal direction and rotatable;
The drive mechanism rotates the second link around the first fixing portion and moves and rotates the first link with respect to the second fixing portion in the event of an emergency, thereby configured to perform said second pivoting movement after said first pivoting movement;
The drive mechanism is
a plurality of balls driven by the gas pressure of a gas generator generated in an emergency;
a tube containing a plurality of balls;
a pinion that is provided around the shaft member that is the first fixing portion and that rotates integrally with the second link by meshing with the ball;
A buckle device that is a pretensioner comprising a A buckle main body to which a tongue provided on the seat belt can be attached,
a buckle stay that supports the buckle main body;
a drive mechanism for driving the buckle stay in an emergency;
A buckle device comprising
The buckle stay is configured such that the buckle main body undergoes a first turning movement in a direction away from the normally seated occupant, and then a second turning movement in a direction approaching the occupant,
The buckle stay includes a first link connected to the buckle main body, a second link connected to the first link and rotatably attached to a first fixing portion provided on the vehicle body or the seat, a link mechanism having a second fixing portion provided on the vehicle body or the seat and supporting the first link so as to be movable along its longitudinal direction and rotatable;
The drive mechanism rotates the second link around the first fixing portion and moves and rotates the first link with respect to the second fixing portion in the event of an emergency, thereby configured to perform said second pivoting movement after said first pivoting movement;
The drive mechanism is
a rack driven by the gas pressure of a gas generator generated in an emergency;
a pinion that is provided around the shaft member that is the first fixing portion and that rotates integrally with the second link by meshing with the rack;
A buckle device that is a pretensioner comprising a A buckle main body to which a tongue provided on the seat belt can be attached,
a buckle stay that supports the buckle main body;
a drive mechanism for driving the buckle stay in an emergency;
A buckle device comprising
The buckle stay is configured such that the buckle main body undergoes a first turning movement in a direction away from the normally seated occupant, and then a second turning movement in a direction approaching the occupant,
The buckle stay includes a first link connected to the buckle main body, a second link connected to the first link and rotatably attached to a first fixing portion provided on the vehicle body or the seat, a link mechanism having a second fixing portion provided on the vehicle body or the seat and supporting the first link so as to be movable along its longitudinal direction and rotatable;
The drive mechanism rotates the second link around the first fixing portion and moves and rotates the first link with respect to the second fixing portion in the event of an emergency, thereby configured to perform said second pivoting movement after said first pivoting movement;
The drive mechanism is
A piston operated by the gas pressure of the gas generator generated in an emergency;
a cylinder slidably housing the piston;
a connecting shaft connecting the first link and the second link, and a retracting member that connects the piston and is retracted by the piston in an emergency;
A buckle device that is a pretensioner comprising a 5. The buckle device according to claim 4 , wherein the retraction member is provided with a return prevention mechanism that prevents the retraction member from moving in the cylinder in a direction opposite to the retraction direction by the piston in the emergency. The buckle device according to any one of claims 1 to 5 , wherein the first pivotal movement of the buckle main body moves upward from an initial position. 7. The buckle device according to claim 6 , wherein the second pivotal movement of the buckle body moves downward after the first pivotal movement. The drive mechanism drives the link mechanism so that the angle formed by the first link and the second link temporarily becomes 180° in the event of an emergency, and moves the buckle main body upward and forward. 8. The buckle device according to any one of claims 1 to 7, wherein the buckle device is moved downward and rearward after being moved downward. The second fixing portion is a shaft member,
The buckle device according to any one of claims 1 to 8, wherein the first link has an elongated hole for guiding the shaft member along its longitudinal direction. The drive mechanism is
The buckle device according to claim 1 , wherein the motor drives the link mechanism by rotating the second link around the first fixing portion. A seatbelt device comprising the buckle device according to any one of claims 1 to 10 .

Images