JP6742264B2 - Tongue for seat belt device - Google Patents

Description

The present invention relates to a tongue for a seat belt device that is engaged with a buckle of a seat belt device.

In the tongue disclosed in Patent Document 1 below, both ends in the longitudinal direction of the shaft are arranged in both fixing holes of the mold part, whereby the shaft is supported by the mold part. Furthermore, a cap is provided in the mold part, and the cap closes both fixing holes from the outside in the longitudinal direction of the shaft.

There is a so-called snap-fit structure as an example of assembling an assembling member such as the cap to a to-be-assembled member such as a tongue body including a mold portion. The snap-fit structure is provided on the other side by a holding portion provided on one of the assembly member and the assembly member such as the tongue body when the assembly member is assembled to the assembly member such as the tongue body. When the elastic part is elastically deformed and the assembly member is assembled to the assembly target member such as the tongue body, the elastic deformation of the elastic part is canceled and the elastic part is held by the holding part. There is.

In such a snap-fit structure, when the elastic member receives a load when the assembling member is attached to the member to be assembled such as the tongue body, the elastic portion is elastically held in a direction such that the holding portion releases the holding of the elastic portion. The part may be elastically deformed.

JP, 2016-60458, A

In view of the above facts, the present invention has an object to obtain a tongue for a seat belt device capable of maintaining the holding of the elastic portion by the holding portion.

The tongue for a seat belt device according to claim 1, further comprising: a tongue body having an insertion portion that can be inserted into a buckle of the seat belt device and an insertion portion through which the webbing is inserted; and an assembly member that is assembled to the tongue body. A holding portion provided on one of the tongue body and the assembling member, and a holding portion provided on the other of the tongue body and the assembling member when the assembling member is assembled to the tongue body. Is elastically deformed in the deformation direction by the elastic member, and in the assembled state of the assembling member to the tongue body, the elastic deformation in the deformation direction is canceled, the elastic member is engaged with the holding portion, and is held by the holding portion. And a load which is provided on the tongue body or the assembling member and receives a load in a direction intersecting the deformation direction when the assembling member is assembled to the tongue body, and the load acts on the elastic portion. And a load receiving portion that suppresses this.

According to the tongue for a seat belt device of claim 1, when the assembling member is assembled to the tongue main body, the tongue main body and the assembling member are attached by a holding portion provided on one of the tongue main body and the assembling member. The elastic portion provided on the other side of the member is elastically deformed in the deformation direction. When the assembling member is assembled to the tongue body, the elastic deformation of the elastic portion in the deformation direction is canceled, the elastic portion is engaged with the holding portion, and the elastic portion is held by the holding portion. This can prevent the assembly member from coming off the tongue body.

On the other hand, the tongue body or the assembling member is provided with a load receiving portion, and the load receiving portion receives a load in a direction intersecting the deformation direction when the assembling member is attached to the tongue body, Is prevented from acting on the elastic portion. As a result, it is possible to prevent the elastic portion from being elastically deformed in the deformation direction by this load, and it is possible to maintain the holding of the elastic portion by the holding portion, so that it is possible to prevent the assembling member from coming off the tongue body.

The seat belt device tongue according to claim 2 is the seat belt device tongue according to claim 1, further comprising a load applying member that is displaceable with respect to one of the tongue body and the assembly member. The receiving portion is arranged to face the load applying member on the displacement direction side of the load applying member, and the displacement of the load applying member is suppressed by contacting the load applying member with the load receiving portion, The application of the load from the load applying member to the elastic portion is suppressed.

According to the seat belt device tongue of claim 2, the load receiving portion is arranged to face the load applying member on the displacement direction side of the load applying member, and the load applying member abuts against the load receiving portion. As a result, the displacement of the load applying member is suppressed. As a result, application of a load from the load applying member to the elastic portion due to displacement of the load applying portion is suppressed.

The seat belt device tongue according to claim 3 is the seat belt device tongue according to claim 1 or 2, wherein the other of the tongue body and the assembly member includes a pair of the elastic portions. A direction of deformation of the elastic portion by the holding portion is a direction in which the other of the elastic portions separates from one of the elastic portions, and the load receiving portion is arranged between the pair of elastic portions.

According to the tongue for a seat belt device of the third aspect, the other of the tongue body and the assembling member includes a pair of elastic portions, and the load receiving portion is arranged between the pair of elastic portions. With this, it is possible to prevent an object from entering between the pair of elastic portions, and prevent such an object from entering between the pair of elastic portions and pressing the pair of elastic portions, and to prevent a load from such an object. By receiving the elastic member, it is possible to suppress elastic deformation of one of the pair of elastic portions in a direction away from the other.

The seat belt device tongue according to claim 4 is the seat belt device tongue according to any one of claims 1 to 3, wherein the assembling member is assembled to the tongue body. The deformation direction of the elastic part by the holding part is a rotation direction with a part of the elastic part opposite to the load acting direction side as a rotation center, and the load receiving part is elastically deformed of the elastic part. The elastic portion is disposed closer to the portion to which the load is applied than the center of rotation by.

According to the seat belt device tongue of the fourth aspect, the load receiving portion is arranged closer to the portion to which the load is applied in the elastic portion than the rotation center due to the elastic deformation of the elastic portion. Therefore, even if a load is applied to the elastic portion on the side opposite to the center of rotation due to the elastic deformation of the elastic portion with the load receiving portion interposed therebetween, the load application position in the elastic portion is not changed by the elastic deformation of the elastic portion. Since it is away from the center of motion, elastic deformation of the elastic portion can be reduced.

The tongue for seat belt device according to claim 5 is the tongue for seat belt device according to any one of claims 1 to 4, wherein the tongue body is movably provided with respect to the tongue body. A clamp member that sandwiches the webbing with the tongue body by being moved, and a support member that is provided on the tongue body and supports the clamp member, wherein the assembling member includes the support member The load receiving portion is restrained from moving with respect to the tongue body, and receives the load generated by the support member moving with respect to the tongue body.

According to the tongue for the seat belt device of the fifth aspect, the load generated by the movement of the support member supporting the clamp member with respect to the tongue body is received by the load receiving portion. As a result, it is possible to prevent the assembling member from coming off the tongue body due to such a load, so that it is possible to maintain the restraint of movement of the supporting member by the assembling member and to keep the supporting member moving with respect to the tongue body.

As explained above, in the seat belt device tongue according to the present invention, the holding of the elastic portion by the holding portion can be maintained.

FIG. 1 is a front view of a seatbelt device to which a tongue for seatbelt device according to an embodiment of the present invention is applied, as seen from the vehicle front side. 1 is an exploded perspective view of a tongue for a seat belt device according to an embodiment of the present invention. It is a perspective view of a lid. FIG. 1A is a front view of a portion of the lid in the assembling direction as seen from the vehicle front side, and FIG. 1A shows a state in which the first elastic piece and the second elastic piece are in contact with the holding portion from the opposite assembling direction side, B) shows a state in which the first elastic piece and the second elastic piece are in contact with the holding portion from the assembly direction side. FIG. 5 is a cross-sectional view of the tongue taken along line 5-5 of FIG. 2, showing a state before the insertion portion of the core metal of the tongue is inserted into the buckle. FIG. 5 is a cross-sectional view of the tongue taken along line 5-5 of FIG. 2, showing a state in which the insertion portion of the core metal of the tongue is inserted into the buckle. FIG. 5 is a cross-sectional view of the tongue taken along line 5-5 of FIG. 2, showing a state in which the clamp member is rotated in the clamp rotation direction side. FIG. 5 is a cross-sectional view of the tongue taken along line 5-5 of FIG. 2, showing a state in which the webbing is sandwiched between the pressing portion of the clamp member and the facing portion of the tongue body.

Next, an embodiment of the present invention will be described with reference to FIGS. 1 to 8. In each drawing, the arrow FR indicates the front side of the vehicle to which the seat belt device 12 is applied, the arrow OUT indicates the outer side in the vehicle width direction, the arrow IN indicates the inner side in the vehicle width direction, and the arrow UP indicates The upper side of the vehicle is shown. Further, an arrow As indicates a direction of assembling the lid 88 as an assembling member to the tongue body 40 as an assembled member, an arrow W1 indicates one side in the width direction of the lid 88, and an arrow W2 indicates a lid. 88 shows the other side in the width direction of 88.

<Structure of the present embodiment>
As shown in FIG. 1, a seat belt device 12 to which a seat belt device tongue 10 according to an embodiment of the present invention (hereinafter, simply referred to as “tongue 10”) is applied is a webbing as a webbing storage means. A winding device 14 is provided. The webbing take-up device 14 includes a spool 15, and a longitudinal base end portion of the webbing 16 is locked to the spool 15. The webbing retractor 14 includes a pretensioner 17. The pretensioner 17 is operated in a vehicle emergency such as a vehicle collision, and the spool 15 is rotated in the winding direction by operating the pretensioner 17. As a result, the webbing 16 is wound around the spool 15. Further, the webbing retractor 14 includes a lock mechanism (not shown). The lock mechanism is activated in a vehicle emergency such as a vehicle collision, and the rotation of the spool 15 in the pull-out direction is limited by the lock mechanism being activated, so that the webbing 16 is pulled out from the spool 15.

On the other hand, the front end side in the longitudinal direction of the webbing 16 passes through a slit hole of the shoulder anchor 18 provided in the vicinity of the vehicle upper end portion of the center pillar and is folded back toward the vehicle lower side. The front end portion in the longitudinal direction of the webbing 16 folded back to the vehicle lower side is locked to the anchor 22. The anchor 22 is arranged on the vehicle width direction outer side of the vehicle seat 20, and the anchor 22 is fixed to the vehicle body. The tongue 10 according to the present embodiment is provided between the longitudinal end of the webbing 16 (the portion locked by the anchor 22) and the shoulder anchor 18.

Further, a buckle 26 is provided inside the seat 20 in the vehicle width direction, and the tongue 10 is held by the buckle 26 while the webbing 16 is hung on the body of the occupant 30. Will be put on your body. In this state, the portion of the webbing 16 between the tongue 10 and the anchor 22 is the lap webbing 32, and the waist of the occupant 30 is restrained by the lap webbing 32. On the other hand, the portion of the webbing 16 between the shoulder anchor 18 and the tongue 10 serves as the shoulder webbing 34, and the shoulder and chest of the occupant 30 are restrained by the shoulder webbing 34.

<Structure of tongue 10>
Next, the configuration of the tongue 10 will be described.

As shown in FIGS. 2 and 5, the tongue 10 includes a tongue body 40, and the tongue body 40 includes a cored bar 42. The cored bar 42 is formed by punching and bending a metal flat plate such as iron or stainless steel. The cored bar 42 includes an insertion portion 44. When the tongue 10 is held by the buckle 26 (see FIGS. 1 and 6), the insertion portion 44 is inserted into the buckle 26 through the opening formed in the buckle 26. A through hole 46 is formed in the insertion portion 44. When the insertion portion 44 is inserted into the buckle 26, the latch provided on the buckle 26 enters the through hole 46. This restricts movement of the insertion portion 44 in the direction in which the insertion portion 44 comes out of the buckle 26 (the vehicle upper side in FIG. 6 and the like), whereby the tongue 10 is held by the buckle 26.

Further, as shown in FIGS. 2 and 5, the cored bar 42 includes a base portion 48. The base portion 48 is a vehicle upper side portion of the insertion portion 44 (a portion of the core metal 42 opposite to the insertion direction of the insertion portion 44 into the buckle 26). As shown in FIG. 5, the vehicle upper portion 48A of the base portion 48 with respect to the vehicle vertical direction intermediate portion is bent outward in the vehicle width direction. Further, the base portion 48 is provided with a covering portion 52. The covering portion 52 is made of a synthetic resin material, and the base portion 48 is covered by the covering portion 52.

Further, the covering portion 52 includes a covering portion main body 52A, and the covering portion main body 52A includes an insertion hole 56 as an insertion portion. A hole that penetrates in the thickness direction of the vehicle upper portion 48A of the base 48 is formed in a portion of the vehicle upper portion 48A of the base 48 of the core metal 42 corresponding to the insertion hole 56 of the covering portion 52. The inner portion of the hole is covered with the covering portion 52 to form the insertion hole 56 of the covering portion 52.

The insertion hole 56 is penetrated in the vertical direction of the vehicle, and the dimension of the insertion hole 56 in the vehicle front-rear direction (the back side and the front side of the paper in FIG. 5, the arrow FR direction in FIG. 2 and the opposite direction) is the same as the webbing 16 The webbing 16 passes inside the insertion hole 56. This allows the tongue 10 to move along the webbing 16 in the longitudinal direction of the webbing 16.

Further, as shown in FIG. 2, the covering part 52 includes a first supporting part 52B and a second supporting part 52C. The first support portion 52B is provided outside the vehicle width direction at the vehicle front end of the covering portion main body 52A. The cored bar 42 includes a first leg piece (not shown) corresponding to the first support portion 52B. The first leg piece is formed by bending the vehicle front side portion of the base portion 48 of the cored bar 42 outward in the vehicle width direction, and by covering the first leg piece with the synthetic resin material forming the covering portion 52. The first support portion 52B is formed.

On the other hand, the second support portion 52C is provided outside the vehicle width direction at the vehicle rear side end of the covering portion main body 52A. Corresponding to the second support portion 52C, the cored bar 42 includes a second leg piece (not shown). The second leg piece is formed by bending the vehicle rear side portion of the base portion 48 of the cored bar 42 outward in the vehicle width direction, and the second leg piece is covered with the synthetic resin material forming the covering portion 52. The second support portion 52C is formed by.

Further, the tongue body 40 is provided with a guide bar 58 as a guide means. The guide bar 58 is disposed below the insertion hole 56 of the covering portion 52 in the vehicle and further outside the insertion hole 56 in the vehicle width direction. The guide bar 58 is made of metal such as iron or stainless steel. The guide bar 58 has a flat plate shape. The shape of the guide bar 58 viewed in the thickness direction is a rectangle, and the longitudinal direction of the guide bar 58 is approximately the vehicle front-back direction (the back side and the front side of the paper in FIG. 5, the arrow FR direction in FIG. It is in the opposite direction.

The cross-sectional shape of the guide bar 58 taken in the direction orthogonal to the longitudinal direction is a rectangle, and the width direction of the guide bar 58 is inclined in the vehicle up-down direction with respect to the vehicle width direction. The (inner side in the vehicle width direction) end is arranged on the vehicle upper side than the other end (outside side in the vehicle width direction) in the width direction of the guide bar 58.

A first support hole 82 is formed in the first support portion 52B of the covering portion 52 described above. The first support hole 82 is a bottomed hole opened on the vehicle rear side surface of the first support portion 52B. The opening shape of the first support hole 82 is substantially the same rectangular shape as the vehicle front side end of the guide bar 58, and when the guide bar 58 is attached to the tongue body 40, the first support hole 82 has a guide bar. The front end portion of the vehicle 58 is inserted. As a result, the vehicle front end of the guide bar 58 is supported by the first support portion 52B of the covering portion 52.

On the other hand, a second support hole 84 is formed in the second support portion 52C of the covering portion 52. The second support hole 84 is a through hole that penetrates the second support portion 52C in the vehicle front-rear direction. The opening shape of the second support hole 84 is substantially the same rectangular shape as the vehicle front end of the guide bar 58, and in the assembled state of the guide bar 58 to the tongue body 40, the vehicle rear end portion of the guide bar 58. Are arranged inside the second support hole 84. As a result, the vehicle rear end portion of the guide bar 58 is supported by the second support portion 52C of the covering portion 52.

A clamp member 62 is provided on the guide bar 58. A support hole 64 is formed in the clamp member 62. The support hole 64 penetrates the clamp member 62 in the vehicle front-rear direction, and as shown in FIGS. 5 and 6, in the initial state of the tongue 10, the guide bar 58 is arranged inside the support hole 64. There is. Further, as shown in FIG. 5, a guide member 66 is formed in the clamp member 62, and when the guide bar 58 is arranged inside the guide member 66 as shown in FIG. 62 can be displaced to one side in the width direction of the guide bar 58 (direction of arrow A in FIG. 7).

Further, as shown in FIG. 5, the vehicle lower side portion of the support hole 64 in the clamp member 62 serves as a limiting rib 68 as a limiting means. When the guide bar 58 is arranged in the support hole 64, the limiting rib 68 is located on one side in the width direction of the clamp member 62 (in the vehicle width direction) with respect to the other end in the width direction (outside in the vehicle width direction) of the guide bar 58. Inside). The limiting rib 68 is in contact with the vehicle lower surface of the clamp member 62, and when the limiting rib 68 is broken by the clamp member 62, the clamp member 62 moves in the clamp rotation direction (direction of arrow B in FIG. 6). Can be turned to.

On the other hand, the clamp member 62 includes a pressing portion 70. The pressing portion 70 is the vehicle upper side portion of the outer peripheral portion of the clamp member 62, which is the vehicle width direction inner side portion. Further, a clamp portion 72 is provided on the covering portion 52 of the tongue body 40. The clamp portion 72 is a portion facing the pressing portion 70 in the width direction of the guide bar 58 with the guide bar 58 arranged in the guide hole 66, and the clamp portion 72 is provided on the covering portion 52. It is provided below the vehicle through the insertion hole 56. As shown in FIG. 8, the webbing 16 is held by being sandwiched between the pressing portion 70 and the clamp portion 72 of the clamp member 62. In this state, the shoulder webbing 34 side portion of the webbing 16 is moved to the lap webbing 32 side. You can restrict movement.

On the other hand, as shown in FIG. 2, a lid mounting portion 86 is provided on the second support portion 52C of the covering portion 52 described above. The lid mounting portion 86 includes a width direction one side portion 86A and a width direction other side portion 86B, and the width direction one side portion 86A and the width direction other side portion 86B are the vehicle vertical direction with respect to the vehicle width direction. They are provided at intervals in the direction inclined to, that is, in the width direction of the lid 88 described later (the arrow W1 direction and the W2 direction in FIG. 4). Further, the lid mounting portion 86 is provided with a lid 88 as an assembly member. The lid 88 extends from the side opposite to the assembling direction (the direction of the arrow As in FIG. 4) inclined inward in the vehicle width direction to the vehicle upper side with respect to the lid mounting portion 86 to the lid mounting portion 86. When assembled, the portion of the lid 88 in the assembling direction when the lid 88 is assembled to the lid mounting portion 86 is disposed between the width direction one side portion 86A and the width direction other side portion 86B of the lid mounting portion 86. To be done.

The lid 88 includes a design portion 90. In the assembled state of the lid 88 to the lid mounting portion 86, the vehicle rear side surface and the anti-assembly direction side surface of the design portion 90 are exposed to the outside of the tongue body 40 of the lid mounting portion 86 as a part of the design surface of the tongue 10. To be done. A facing portion 92 is provided on the vehicle front side of the design portion 90. The vehicle rear end of the facing portion 92 is connected to the vehicle front end of the design portion 90, and the facing portion 92 is integrated with the design portion 90. In the assembled state of the lid 88 to the lid mounting portion 86, the facing portion 92 faces the vehicle rear side of the second support portion 52C on the vehicle rear side of the second support portion 52C of the covering portion 52. Further, a part of the facing portion 92 on the center side in the vehicle width direction faces a portion of the second supporting hole 84 of the second supporting portion 52C on the side opposite to the assembling direction.

A first elastic piece 94 and a second elastic piece 96 each serving as an elastic portion are provided on the assembly direction side of the facing portion 92. The first elastic piece 94 and the second elastic piece 96 are arranged apart from the design portion 90 on the vehicle front side of the design portion 90. As shown in FIGS. 4A and 4B, the first elastic piece 94 includes a first base portion 94A. The first base portion 94A is formed in a rod shape, and the longitudinal direction of the first base portion 94A is along the assembling direction. The longitudinal base end of the first base portion 94A is connected to the end of the facing portion 92 in the mounting direction, and the first elastic piece 94 extends from the end of the facing portion 92 in the mounting direction toward the mounting direction. .. A first hook portion 94B is provided on the front end side in the longitudinal direction of the first base portion 94A.

The first hook portion 94B has a substantially C shape, and is opened in a direction inclined to the side opposite to the assembly direction with respect to the other side in the width direction of the lid 88 (the side in the arrow W2 direction in FIG. 3 and the like). .. The longitudinal base end of the first hook portion 94B is connected to the longitudinal end of the first base portion 94A, and the longitudinal middle portion of the first hook portion 94B is located on one side in the width direction of the lid 88 than the first base portion 94A. (The direction of the arrow W1 in FIG. 3 etc.) Further, the middle portion in the longitudinal direction of the first hook portion 94B is bent toward the other side in the width direction of the lid 88 at the tip end side in the longitudinal direction, and the tip end portion in the longitudinal direction of the first hook portion 94B is covered by the lid more than the first base portion 94A. It is arranged on the other side of 88 in the width direction. Furthermore, the longitudinal end of the first hook portion 94B is a first pawl 94C, and the longitudinal end surface of the first hook portion 94B in the first pawl 94C is in the width direction of the lid 88 (direction of arrow W1 in FIG. 3 and the like). And a direction substantially parallel to the arrow W2 direction).

On the other hand, the second elastic piece 96 is provided on the other widthwise side of the lid 88 with respect to the first elastic piece 94. The second elastic piece 96 includes a second base portion 96A. The second base portion 96A is formed in a rod shape, and the longitudinal direction of the second base portion 96A is along the assembling direction. The longitudinal base end of the second base portion 96A is connected to the end of the facing portion 92 in the mounting direction, and the second elastic piece 96 extends from the end of the facing portion 92 in the mounting direction toward the mounting direction. .. A second hook portion 96B is provided on the front end side in the longitudinal direction of the second base portion 96A.

The second hook portion 96B has a substantially C-shape (more specifically, a substantially anti-C shape in which the C-shape is reversed to the left and right), and one side in the width direction of the lid 88 (direction of arrow W1 in FIG. 3 and the like). Side) is opened in a direction inclined to the side opposite to the assembling direction. The longitudinal base end of the second hook portion 96B is connected to the longitudinal end of the second base portion 96A, and the longitudinal middle portion of the second hook portion 96B is on the other side in the width direction of the lid 88 than the second base portion 96A. (Toward the arrow W2 direction in FIG. 4 and the like). Further, the middle portion of the second hook portion 96B in the longitudinal direction is bent toward the one side in the width direction of the lid 88 at the tip end side in the longitudinal direction, and the tip end portion in the longitudinal direction of the second hook portion 96B is closer to the lid than the second base portion 96A. It is arranged on one side in the width direction of 88. Furthermore, the longitudinal end of the second hook portion 96B is the second pawl 96C, and the longitudinal end surface of the second hook portion 96B of the second pawl 96C is in the width direction of the lid 88 (direction of arrow W1 in FIG. 4 and the like). And a direction substantially parallel to the arrow W2 direction).

Corresponding to the first elastic piece 94 and the second elastic piece 96, a holding portion 98 is provided between the width direction one side portion 86A and the width direction other side portion 86B of the lid mounting portion 86 of the tongue body 40. It is provided (see FIG. 3). The holding portion 98 is formed to project from the vehicle rear side surface of the second support portion 52C of the covering portion 52 to the vehicle rear side. As shown in FIGS. 4A and 4B, the holding portion 98 includes a holding portion main body 98A. The holding portion main body 98A has a substantially rectangular parallelepiped shape, and the longitudinal direction of the holding portion main body 98A is along the width direction of the lid 88 (arrow W1 direction and arrow W2 direction in FIG. 4 and the like) and the width of the holding portion main body 98A. The direction is along the assembling direction (arrow As direction in FIG. 4 and the like).

A first engaging portion 98B is provided on one side in the width direction of the lid 88 in the holding portion main body 98A. The side surface of the first engaging portion 98B in the assembling direction is arranged closer to the side of the assembling direction than the side surface of the holding portion body 98A in the assembling direction, and is inclined to one side in the width direction of the lid 88 with respect to the assembling direction. It is a plane. On the other hand, the side surface of the first engaging portion 98B opposite to the assembling direction is arranged closer to the side of the assembling direction than the side surface of the holding portion body 98A in the assembling direction. It is a flat surface inclined to the other side in the width direction of the lid 88). The other widthwise end of the lid 88 in the first engaging portion 98B is connected to one widthwise end of the lid 88 in the holding portion main body 98A.

A second engaging portion 98C is provided on the other side of the holding portion main body 98A in the width direction of the lid 88. The side surface of the second engaging portion 98C in the assembling direction is arranged on the side in the assembling direction of the side surface of the holding portion main body 98A in the assembling direction, and is inclined to one side in the width direction of the lid 88 with respect to the assembling direction. It is a plane. On the other hand, the side surface of the second engaging portion 98C opposite to the assembling direction is disposed closer to the side of the assembling direction than the side surface of the holding portion main body 98A assembling direction, and the side surface of the lid 88 of the lid 88 with respect to the opposite assembling direction. It is a flat surface inclined to the other side in the width direction. One widthwise end of the lid 88 in the second engaging portion 98C is connected to the other widthwise end of the lid 88 in the holding portion main body 98A.

When the lid 88 is assembled to the lid mounting portion 86 of the tongue body 40, the holding portion 98 is arranged between the first elastic piece 94 and the second elastic piece 96 on the assembling direction side. In this state, on the side of the holding portion 98 on the side opposite to the mounting direction, on the side of the first corner portion 98D at the boundary between the holding portion main body 98A and the first engaging portion 98B, on the side opposite to the mounting direction, the first elastic piece 94 One slope portion 94E is arranged. The first inclined surface portion 94E is a flat surface inclined to one side in the width direction of the lid 88 with respect to the assembling direction, and when the lid 88 is assembled to the lid mounting portion 86, the first inclined surface portion 94E is The line contact is made with the first corner portion 98D of the holding portion 98.

On the other hand, when the holding portion 98 is disposed on the side of the first elastic piece 94 and the second elastic piece 96 in the assembling direction, the holding portion main body 98A and the second engagement on the side surface of the holding portion 98 opposite to the assembling direction. The second slope portion 96E of the second elastic piece 96 is arranged on the side opposite to the assembly direction of the second corner portion 98E, which is the boundary with the portion 98C. The second inclined surface portion 96E is a flat surface inclined to the other side in the width direction of the lid 88 with respect to the assembling direction, and when the lid 88 is assembled to the lid mounting portion 86, the second inclined surface portion 96E is The line contact is made with the second corner portion 98E of the holding portion 98.

Further, as shown in FIG. 4B, when the lid 88 is assembled to the lid mounting portion 86 of the tongue body 40, the holding portion body 98A of the holding portion 98 causes the first claw 94C of the first elastic piece 94. The second elastic piece 96 is arranged on the side opposite to the second claw 96C in the assembling direction. In this state, the first claw corner portion 94D of the first claw 94C on one side in the width direction of the lid 88 opposes the side surface of the first engaging portion 98B of the holding portion 98 in the assembling direction along the assembling direction. Thus, the first claw corner portion 94D of the lid 88 and the side surface of the holding portion 98 of the first engaging portion 98B in the assembling direction are in line contact with each other.

On the other hand, in the assembled state of the lid 88 to the lid mounting portion 86, the second claw corner portion 96D of the second claw 96C of the second elastic piece 96 on the other side in the width direction of the lid 88 is the first claw portion of the holding portion 98. The second claw corner portion 96D of the lid 88 and the side surface of the holding portion 98 in the assembling direction of the second engaging portion 98C are a line that is opposed to the side surface of the second engaging portion 98C in the assembling direction along the assembling direction. Contacted.

On the other hand, the lid 88 is provided with vertical ribs 100 as load receiving portions. The vertical rib 100 has a substantially rectangular parallelepiped shape that is long in the assembling direction, and is arranged substantially in the center between the first elastic piece 94 and the second elastic piece 96 of the lid 88. An end of the vertical rib 100 on the side opposite to the assembling direction is connected to an end of the facing portion 92 of the lid 88 on the side of the assembling direction, and a rear end of the vertical rib 100 on the vehicle side is an end of the design portion 90 of the lid 88 on the vehicle front side. The vertical rib 100 is integrated with the facing portion 92 and the design portion 90. Further, the vertical rib 100 faces the second support hole 84 of the second support portion 52C of the tongue body 40. Further, the vehicle front side surface of the vertical rib 100 is arranged at the same position as the vehicle front side surfaces of the first elastic piece 94 and the second elastic piece 96 in the vehicle front-rear direction.

<Operation and effect of the present embodiment>
In the seat belt device 12 to which the present tongue 10 is applied, when the body of the occupant 30 attempts to inertially move to the front side of the vehicle in a vehicle emergency such as a vehicle collision, among the webbings 16, the lap webbing attached to the waist of the occupant's body. 32 is pulled in the direction of arrow F in FIG. 6 by the body of the occupant 30. As a result, the clamp member 62 tries to rotate in the clamp rotation direction (the direction of arrow B in FIG. 6) by the reaction force with the webbing 16. When the limiting rib 68 is broken by the rotation of the clamp member 62 in the clamp rotation direction, the arrangement position of the guide bar 58 in the clamp member 62 is changed to the support hole 64 in the clamp member 62 as shown in FIG. 7. Is changed to the inside of the guide hole 66.

When the clamp member 62 is further pulled by the webbing 16 in this state, as shown in FIG. 8, the clamp member 62 is guided by the guide bar 58 and is positioned on one side in the width direction of the guide bar 58 (the inside in the vehicle width direction; 7 is displaced in the direction of arrow A). As a result, one side surface in the thickness direction of the webbing 16 is pressed by the pressing portion 70 of the clamp member 62, and the webbing 16 is displaced together with the clamp member 62 to one side in the width direction of the guide bar 58, so that the webbing 16 is removed. It is held by being sandwiched between the pressing portion 70 of the clamp member 62, both abutting portions 74 of the tongue body 40, and the restraining portions 78. As a result, the shoulder webbing 34 side portion of the webbing 16 can be restricted from moving to the lap webbing 32 side, and the waist of the occupant 30 can be more effectively restrained by the lap webbing 32.

On the other hand, in the process of assembling the tongue 10 in the present embodiment, the clamp member 62 is arranged between the first support portion 52B and the second support portion 52C of the covering portion 52 of the tongue body 40. In this state, the guide bar 58 approaches the second support portion 52C from the vehicle rear side of the tongue body 40, and the guide bar 58 is inserted into the second support hole 84 of the second support portion 52C from the vehicle front side portion of the guide bar 58. To be done. The vehicle front portion of the guide bar 58 passing through the second support hole 84 is inserted into the support hole 64 of the clamp member 62. The vehicle front side end of the guide bar 58 that has passed through the support hole 64 of the clamp member 62 approaches the first support portion 52B and is inserted into the first support hole 82. In this state, the vehicle rear end of the guide bar 58 is arranged inside the second support hole 84 of the second support portion 52C, whereby the vehicle rear end of the guide bar 58 of the tongue body 40 is provided. It is supported by the first support portion 52B and the second support portion 52C.

Next, the lid 88 is approached to the lid mounting portion 86 of the covering portion 52 from the side opposite to the mounting direction, and the portion of the lid 88 on the mounting direction side is located in the width direction one side portion 86A of the lid mounting portion 86 and the width direction other side. It is arranged between the part 86B. Thus, the lid 88 approaches the lid mounting portion 86 of the covering portion 52 from the side opposite to the assembling direction, so that the first elastic piece 94 and the second elastic piece 96 of the lid 88 move to the second tongue body 40. The holding portion 98 of the support portion 52C is approached. As a result, the first inclined surface portion 94E of the first elastic piece 94 is in line contact with the first corner portion 98D of the holding portion 98, and the second inclined surface portion 96E of the second elastic piece 96 is in contact with the second corner portion 98E of the holding portion 98. Line contact is made.

When the lid 88 is moved toward the assembling direction in this state, the first inclined surface portion 94E of the first elastic piece 94 receives the pressing reaction force F1 from the first corner portion 98D of the holding portion 98. The pressing reaction force F1 has a component F11 directed to one side in the width direction of the lid 88. As a result, the first elastic piece 94 is elastically deformed to one side in the width direction of the lid 88 (arrow W11 side in FIG. 4A) around the deformation center X1 of the portion of the first base portion 94A on the side opposite to the assembling direction. It Further, in this state, the second inclined surface portion 96E of the second elastic piece 96 receives the pressing reaction force F2 from the second corner portion 98E of the holding portion 98. The pressing reaction force F2 has a component F21 directed to the other side in the width direction of the lid 88. As a result, the second elastic piece 96 is elastically deformed toward the other side in the width direction of the lid 88 (arrow W21 side in FIG. 4A) centering on the deformation center X2 of the portion of the second base portion 96A on the side opposite to the assembling direction. It

In this way, the first elastic piece 94 and the second elastic piece 96 of the lid 88 are elastically deformed so as to separate from each other, so that the lid 88 can move in the assembling direction. In this manner, the lid 88 is moved, and the other widthwise end of the lid 88 of the first hook 94C of the first hook portion 94B of the first elastic piece 94 is attached in the assembly direction of the first engaging portion 98B of the holding portion 98. The side edge of the lid 88 is moved toward the assembling direction side of the width direction side edge of the lid 88, and the width direction side edge of the lid 88 is held by the second hook 96C of the second hook portion 96B of the second elastic piece 96. When the end of the second engaging portion 98C of the portion 98 on the side in the assembling direction is moved to the side in the assembling direction with respect to the other end in the width direction of the lid 88, each of the first elastic piece 94 and the second elastic piece 96 is moved. , Restored by its own elasticity.

As a result, the first claw 94C of the first hook portion 94B of the first elastic piece 94 is arranged on the other side in the width direction of the lid 88 than the one side end of the lid 88 in the width direction of the first engaging portion 98B of the holding portion 98. The second claw 96C of the second hook portion 96B of the second elastic piece 96 is arranged on one side in the width direction of the lid 88 than the other end in the width direction of the lid 88 in the second engaging portion 98C of the holding portion 98. It Thereby, the first claw 94C of the first hook portion 94B of the first elastic piece 94 is opposed to the first engaging portion 98B of the holding portion 98 in the assembling direction, and the second hook portion of the second elastic piece 96 is formed. The second pawl 96C of 96B faces the second engaging portion 98C of the holding portion 98 in the assembling direction. As a result, the first hook portion 94B of the first elastic piece 94 and the second hook portion 96B of the second elastic piece 96 are held by the holding portion 98, the lid 88 is assembled to the tongue body 40, and the tongue body of the lid 88 is assembled. The movement in the direction opposite to the assembling direction with respect to 40 is restricted.

By the way, for example, when the vehicle is accelerated such as when the vehicle starts, the guide bar 58 tends to be displaced toward the rear side of the vehicle due to inertia. As a result, both widthwise side portions of the lid 88 on the vehicle rear side surface of the guide bar 58 are disposed on the vehicle front side surface of the first elastic piece 94 of the lid 88 and on the vehicle widthwise other side portion of the lid 88. The first elastic piece 94 and the second elastic piece 96 are pressed toward the rear side of the vehicle by the guide bar 58 while being brought into contact with one side portion of the side surface of the lid 88 in the width direction. By receiving such a load on the width direction other side portion of the lid 88 on the vehicle front side surface of the first elastic piece 94 and on the width direction one side portion of the lid 88 on the vehicle front side surface of the second elastic piece 96, the first elasticity is obtained. The piece 94 and the second elastic piece 96 try to deform so as to separate from each other.

Here, in the present embodiment, the lid 88 is provided with the vertical rib 100. The vertical rib 100 faces the second support hole 84 of the second support portion 52C of the tongue main body 40, and the vehicle front side surface of the vertical rib 100 has a first elastic piece 94 and a second elastic piece 96 in the vehicle front-rear direction. Is arranged at the same position as the front side surface of each vehicle. Therefore, when the vehicle rear side surface of the guide bar 58 is brought into contact with the vehicle front side surface of the first elastic piece 94 and the vehicle front side surface of the second elastic piece 96, the lid 88 on the vehicle rear side surface of the guide bar 58 is provided. The central portion in the width direction is brought into contact with the vehicle front side surface of the vertical rib 100. As a result, the vertical ribs 100 receive a load from the guide bar 58 to the vehicle rear side, and the displacement of the guide bar 58 to the vehicle rear side is suppressed.

As a result, application of a load from the guide bar 58 to the first elastic piece 94 and the second elastic piece 96 on the rear side of the vehicle is suppressed, so that the first elastic piece 94 and the second elastic piece due to the load from the guide bar 58. The elastic deformation of 96 is suppressed. As a result, the first claw 94C of the first hook portion 94B of the first elastic piece 94 and the first engaging portion 98B of the holding portion 98 face each other and the second claw of the second hook portion 96B of the second elastic piece 96. 96C and the second engaging portion 98C of the holding portion 98 can be maintained in an opposed state, and movement of the lid 88 in the direction opposite to the assembling direction with respect to the tongue body 40, that is, the lid 88 can be prevented from coming off the tongue body 40. ..

An end of the vertical rib 100 opposite to the assembling direction is connected to an end of the facing portion 92 of the lid 88 in the assembling direction. It is connected to the edge. Thereby, for example, the mechanical strength or rigidity of the design part 90 of the lid 88 can be increased. Thereby, for example, the design portion 90 can be made thin, and the lid 88 can be made small and lightweight.

Further, the vertical rib 100 is arranged between the first claw 94C of the first elastic piece 94 and the second elastic piece 96, and the end of the vertical rib 100 in the assembling direction is the above-mentioned deformation of the first elastic piece 94. It is arranged on the assembly direction side with respect to the center X1 and the deformation center X2 of the second elastic piece 96. Therefore, if the guide bar 58 displaced toward the vehicle rear side is inclined, the portion of the guide bar 58 on the vehicle rear side end that is closer to the mounting direction than the vertical rib 100 is the first elastic piece 94 and the second elastic piece. Even if the piece 96 is pressed, the deformation center of the elastic deformation of the first elastic piece 94 in this case is on the side of the assembly direction from the deformation center X1, and the deformation center of the elastic deformation of the second elastic piece 96 is the deformation center. It will be on the assembly side from X2. As a result, the amount of elastic deformation of the first elastic piece 94 and the second elastic piece 96 can be reduced.

Further, each of the first inclined surface portion 94E of the first elastic piece 94 of the lid 88 and the second inclined surface portion 96E of the second elastic piece 96 is a flat surface. For this reason, it is possible to reduce the change in the increase amount of the elastic deformation amount of the first elastic piece 94 due to the first reaction surface 94E of the first elastic piece 94 receiving the pressing reaction force from the first corner portion 98D of the holding portion 98, It is possible to reduce the change in the increase amount of the elastic deformation amount of the second elastic piece 96 due to the second slope portion 96E of the second elastic piece 96 receiving the pressing reaction force from the second corner portion 98E of the holding portion 98.

Further, the side surfaces of the first engaging portion 98B and the second engaging portion 98C of the holding portion 98 in the assembling direction are flat. Therefore, the first claw corner portion 94D of the first elastic piece 94 of the lid 88 receives the pressing reaction force from the side surface of the first engaging portion 98B in the assembling direction, thereby increasing the elastic deformation amount of the first elastic piece 94. Of the second elastic piece 96 of the lid 88, and the second claw corner portion 96D of the second elastic piece 96 of the lid 88 receives the pressing reaction force from the side surface of the second engaging portion 98C in the assembling direction. The change in the increase amount of can be reduced.

In the present embodiment, the two elastic portions are the first elastic piece 94 and the second elastic piece 96. However, for example, the number of elastic portions may be one, and the number of elastic portions is not particularly limited.

Further, in the present embodiment, the vehicle front side surface of the vertical rib 100 as the load receiving portion is located at the same position as the vehicle front side surfaces of the first elastic piece 94 and the second elastic piece 96 as the elastic portion in the vehicle front-rear direction. It was arranged. The vehicle front side surface of the load receiving portion may be disposed on the vehicle front side with respect to the vehicle front side surface of the elastic portion, or may be disposed on the vehicle rear side with respect to the vehicle front side surface of the elastic portion.

Further, in the present embodiment, the assembly member is the lid 88. However, the assembly member is not limited to the lid 88 and can be widely applied as long as it is a member assembled to the tongue body 40.

10 Tongue for seat belt device 12 Seat belt device 16 Webbing 26 Buckle 40 Tongue body 44 Insertion portion 56 Insertion hole (insertion portion)
58 Guide bar (support member)
62 Clamp member 88 Lid (assembly member)
94 1st elastic piece (elastic part)
96 Second elastic piece (elastic part)
98 Holding part 100 Vertical rib (load receiving part)

Claims (5)

A tongue body having an insertion portion that can be inserted into the buckle of the seat belt device and an insertion portion through which the webbing is inserted;
An assembly member assembled to the tongue body,
A holding portion provided on one of the tongue body and the assembly member,
It is provided on the other of the tongue body and the assembling member, and when the assembling member is assembled to the tongue body, it is elastically deformed in the deformation direction by the holding portion, and the assembling member is assembled to the tongue body. In the attached state, elastic deformation in the deformation direction is canceled, the elastic part is engaged with the holding part, and is held by the holding part,
A load that is provided on the tongue body or the assembling member and that receives a load in a direction intersecting a deformation direction when the assembling member is attached to the tongue body, and the load acts on the elastic portion. A load receiving portion that suppresses
A tongue for a seat belt device having a. A load applying member that is displaceable with respect to one of the tongue body and the assembling member; The seat belt device according to claim 1, wherein displacement of the load applying member is suppressed by contacting the load applying member with the load receiving portion, and application of the load from the load applying member to the elastic portion is suppressed. For tongue. The other of the tongue body and the assembly member includes a pair of elastic portions, and the deformation direction of the elastic portions by the holding portion is a direction in which the other of the elastic portions separates from one of the elastic portions. The tongue for a seat belt device according to claim 1 or 2, wherein the load receiving portion is disposed between the pair of elastic portions. When the assembly member is assembled to the tongue main body, a deformation direction of the elastic portion by the holding portion is a rotation direction with a portion of the elastic portion opposite to a load acting direction side as a rotation center. The load receiving portion is arranged closer to a portion of the elastic portion to which the load is applied than a center of rotation due to elastic deformation of the elastic portion. The tongue for the seat belt device described. A clamp member that is provided on the tongue body so as to be movable with respect to the tongue body, and that clamps the webbing with the tongue body by being moved,
A support member provided on the tongue body and supporting the clamp member;
The assembly member suppresses movement of the support member with respect to the tongue body, and the load receiving portion receives a load generated by movement of the support member with respect to the tongue body. The tongue for a seat belt device according to any one of claims 1 to 4.