JP6012561B2 - Seat belt buckle device and seat belt device - Google Patents

Description

  The present invention relates to a seat belt buckle device that fixes and releases a tongue plate provided on a webbing, and a seat belt device including the seat belt buckle device.

  The seat belt buckle is a device for fixing and releasing the tongue plate, and is disposed on the floor on the side of the seat cushion or near the boundary between the seat cushion and the seat back. The current seat belt buckle has a structure in which the tongue plate can be fixed simply by inserting the tongue plate, and the tongue plate can be released simply by pressing the release button. Thus, since the seat belt buckle has a configuration in which the seat belt can be easily attached and detached, the seat belt buckle contributes to an improvement in the seat belt mounting rate.

  As a recent seat belt buckle, a type in which the position of the buckle body portion can be adjusted by supporting the buckle body portion into which the tongue plate is inserted with a lever-like buckle stay has become widespread. According to such a type, the buckle body can be moved so as to rotate in the vehicle front-rear direction around the base of the buckle stay. Further, for example, in the case of the seat belt buckle described in Patent Document 1, it is also possible to adjust the position by sliding the buckle stay in the vehicle front-rear direction from its root.

JP 2012-131360 A

  As with the seat belt buckle of Patent Document 1, if the position of the buckle body is supported by the buckle stay and the position is adjusted, the webbing can be brought into close contact with the occupant of various body shapes and postures. become. However, the base of the buckle stay is also a place where the load from the occupant concentrates in an emergency. If the base is configured to be slidable in the vehicle longitudinal direction, the durability against the load may be affected.

  In view of such a problem, an object of the present invention is to provide a seat belt buckle device capable of adjusting the position in the vehicle front-rear direction and improving durability against a load.

  In order to solve the above problems, a representative configuration of a seat belt buckle device according to the present invention is a seat belt buckle device that fixes a tongue plate provided on a webbing, and is installed in the vicinity of a side portion of a vehicle seat. A feed screw member that is long in the longitudinal direction of the vehicle and has a screw on the outer periphery, a slider that has a female screw that meshes with a male screw of the feed screw member, and a slider that is installed on the feed screw member; Provided is a lock portion that is convex outward toward the rotation axis of the feed screw member, a motor unit that rotates the feed screw member, and a cover rail that is provided around the feed screw member, It has a first edge and a second edge extending on both sides of the lock member along the longitudinal direction of the feed screw member, and when the feed screw member rotates, the first edge or the second edge is A cover rail that slides the slider in the longitudinal direction of the feed screw member by interfering with the hook portion to prevent the slider from rotating, a buckle stay that is attached to the slider at one end, and a tongue plate that is attached to the other end of the buckle stay And a cover rail is a receiving part formed in a concave shape at a predetermined position of the first edge or the second edge, and a lock part on the slider that has been slid It has the receiving part which hold | maintains the position of a slider by meshing | engaging with.

  The slider slides on the feed screw member in contact with the cover rail, but the lock on the slider engages the receiving part of the cover rail at a predetermined position, and the slide is stopped and the position is held at that position. The The slider can support the buckle stay and the buckle main body portion with high support rigidity as long as the lock portion and the receiving portion are engaged with each other. Therefore, the slider can withstand even when a sudden load from an occupant is applied to the buckle main body and the buckle stay in an emergency or the like.

  The above slider has a first slider provided with a female screw and a lock portion, and is separated from the first slider, does not have a female screw, and is connected to the first slider so as to be rotatable relative to the first slider. And a second slider to which one end of the stay is attached. According to this configuration, the first slider tries to rotate along the male screw of the feed screw member, but the second slider does not rotate. If it is this 2nd slider, it will become possible to support the buckle stay suitably and to stabilize the posture.

  The lock portion may be provided on the upper or lower portion of the first slider. Since the first slider has the female screw, it tries to rotate together with the rotation of the feed screw member. Therefore, by providing the lock portion on the upper or lower portion of the first slider, the lock portion can be brought into contact with the first edge portion and the second edge portion of the cover rail and can be suitably meshed with the receiving portion.

  Another typical configuration of the seat belt buckle device according to the present invention is a seat belt buckle device for fixing a tongue plate provided on a webbing, which is installed in the vicinity of a side portion of a vehicle seat and is long in the vehicle front-rear direction. A lead screw member having a thread on the outer periphery with a scale, a first slider installed on the feed screw member with a female screw meshing with a male screw of the feed screw member, and a female screw separate from the first slider A second slider that does not have the first slider, an elastic connecting member that elastically connects the second slider to the rear side of the first slider so as to be rotatable relative to the first slider, and an outer surface of the first slider And a lever-type lock lever provided on the vehicle front side of the second slider, the projection being convex outwardly with respect to the rotation axis of the feed screw member. Predetermined It has a rolling shaft and can tilt and stand, and tilts in a direction in which the lock lever rises at a position facing the lock lever of the first slider and a lock lever whose tip is directed to the first slider side. An inclined surface, a motor unit for rotating the feed screw member, a cover rail provided around the feed screw member, a first edge extending on both sides of the lock member along the longitudinal direction of the feed screw member, and A second edge and a receiving portion formed in a concave shape in which only the lock lever meshes at a predetermined position of the first edge or the second edge, and when the feed screw member rotates, the first edge or A cover rail that slides the first slider and the second slider in the longitudinal direction of the feed screw member by the second edge interfering with the protrusion and preventing the rotation of the first slider, and one end of the second slider is attached to the second slider. A buckle stay that is attached to the other end of the buckle stay, and a buckle main body portion into which the tongue plate is inserted. When a load is applied to the front of the vehicle on the second slider, the elastic connecting member is compressed and locked. The lever stands up in contact with the inclined surface of the first slider, and the position of the first slider is maintained by engaging the lock lever with the receiving portion of the first edge or the second edge of the cover rail. To do.

  In the above configuration, when a load is applied to the second slider through the webbing, the buckle main body, and the buckle stay in an emergency, the lock lever rises and meshes with the receiving portion. Accordingly, the position of the second slider is maintained, and the second slider can support the buckle stay and the buckle main body with high support rigidity. As described above, the seat belt buckle device configured as described above can suitably withstand even when a sudden load from an occupant is applied to the buckle main body and the buckle stay in an emergency or the like.

  Said receiving part may be formed over the whole area of the longitudinal direction of the 1st edge part or 2nd edge part of a cover rail. If it is this structure, even if it exists in any position with respect to a cover rail, it will become possible to lock the 2nd slider if the load ahead of a vehicle is applied.

  In order to solve the above problems, a typical configuration of a seat belt apparatus according to the present invention includes the above-described seat belt buckle apparatus. If the seatbelt device includes the seatbelt buckle device described above, not only can the position of the buckle body be slid in the vehicle longitudinal direction, but the buckle body can be supported with high support rigidity in an emergency. Accordingly, it is possible to improve the usability and restraint force of webbing.

  The seat belt device may further include a pretensioner that pulls the webbing into the retractor in an emergency. Since the seat belt device has improved webbing support rigidity by the seat belt buckle device, even if a tensile pressure is applied to the webbing during operation of the pretensioner, the webbing can be suitably supported to restrain the occupant. .

  ADVANTAGE OF THE INVENTION According to this invention, it becomes possible to provide the seatbelt buckle apparatus which can adjust the position in the vehicle front-back direction, and can also improve the durability with respect to a load.

It is the perspective view which illustrated the outline of the seatbelt buckle device concerning the embodiment of the present invention. It is an enlarged view of the buckle apparatus of FIG. It is the figure which illustrated the slider periphery of Fig.2 (a) from each direction. It is the figure which illustrated the process in which the slider of Fig.3 (a) slides. It is the figure which illustrated the buckle device of 2nd Embodiment concerning this invention. It is the figure which illustrated the process in which the lock lever of FIG.5 (b) stood up.

  Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. The dimensions, materials, and other specific numerical values shown in the embodiments are merely examples for facilitating understanding of the invention, and do not limit the present invention unless otherwise specified. In the present specification and drawings, elements having substantially the same function and configuration are denoted by the same reference numerals, and redundant description is omitted, and elements not directly related to the present invention are not illustrated. To do.

(First embodiment)
FIG. 1 is a perspective view illustrating an outline of a seat belt buckle device (hereinafter referred to as a buckle device 100) according to an embodiment of the present invention. FIG. 1 illustrates the entire seat belt device 101 for the right front seat (seat 102) including the buckle device 100 as viewed from the left front seat side. In each drawing including FIG. 1, the vehicle longitudinal direction is represented by the X axis, the vehicle width direction is represented by the Y axis, and the vertical direction is represented by the Z axis.

  The seat belt device 101 is a safety device provided in the seat 102 and restrains the occupant to the seat 102 using a belt-like webbing 104. The webbing 104 is wound around the retractor 106 at the base side, and the tip side is folded downward through a through anchor 108 attached to the upper center pillar 107 and fixed to the webbing anchor 110. A tongue plate 112 is provided between the through anchor 108 and the webbing anchor 110. When the occupant inserts the tongue plate 112 into the buckle device 100, the seat belt device 101 is put on.

  The buckle device 100 is a device that fixes and releases the tongue plate 112 provided on the webbing 104. The tongue plate 112 is fixed by being inserted into the insertion port 116 of the buckle main body 114 of the buckle device 100, and is released by pressing a release button 118 adjacent to the opening 116.

  A pretensioner 120 is connected to the retractor 106. The pretensioner 120 is a part that pulls the webbing 104 into the retractor 106 in order to increase the restraining force of the webbing 104 in an emergency. The pretensioner 120 has a gas generating agent inside, and by utilizing the gas pressure, the spindle (not shown) of the retractor 106 is instantaneously rotated in the winding direction of the webbing 104 to tighten the webbing 104. This makes it possible to protect passengers more fully.

  FIG. 2 is an enlarged view of the buckle device 100 of FIG. FIG. 2 illustrates the buckle device 100 as viewed from the vehicle inner side in the vehicle width direction. The buckle device 100 can move the installation position of the buckle stay 122 supporting the buckle main body 114 toward the vehicle front-rear direction.

  The buckle stay 122 has a long plate shape, and one end 123 of the buckle stay 122 is attached to the slider 126 by a shaft member 124, so that the buckle stay 122 can be tilted in the vehicle front-rear direction or erected. Further, a buckle body 114 is attached to the other end 128 of the buckle stay 122, and a connecting portion with the buckle body 114 can also be moved so as to rotate in the vehicle front-rear direction.

  The buckle body 114 can be adjusted in position in the vehicle longitudinal direction in order to improve the ease of use of the seat belt device 101 (see FIG. 1). Therefore, the slider 126 at the base of the buckle stay 122 is configured to be slidable in the vehicle front-rear direction along the cover rail 130. The cover rail 130 is a rail-like member that is installed in the side portion of the seat cushion 103 and is long in the vehicle front-rear direction. A feed screw member 132 is installed inside the cover rail 130. The feed screw member 132 is a part to which the slider 126 is directly connected. The feed screw member 132 is long in the vehicle front-rear direction and has a screw 134 on the outer periphery.

  FIG.2 (b) is AA sectional drawing of the cover rail 130 of Fig.2 (a). As illustrated in FIG. 2B, the cover rail 130 has a U-shaped cross section having an opening 136 on the inner side in the vehicle width direction. The feed screw member 132 is installed so as to be enclosed in the U-shaped cover rail 130.

  The feed screw member 132 can rotate in the radial direction. As illustrated in FIG. 2A, the buckle device 100 is provided with a motor unit 138 for rotating the feed screw member 132. The slider 126 moves in the vehicle front-rear direction along the cover rail 130 as the feed screw member 132 rotates.

  FIG. 3 is a diagram illustrating the periphery of the slider 126 in FIG. 2A from each direction. FIG. 3A is an enlarged view of the slider 126 of FIG. The slider 126 includes a first slider 142 on the vehicle front side and a second slider 144 on the vehicle rear side. FIG. 3B is an enlarged perspective view of the slider 126 of FIG. As illustrated in FIG. 2B, one end 123 of the buckle stay 122 is connected to the second slider 144.

  FIG. 3C is a BB cross-sectional view of the slider 126 of FIG. As illustrated in FIG. 3C, the first slider 142 is formed with a female screw 146, and the first slider 142 sends the female screw 146 to the female screw 132 (see FIG. 3A). 134 is installed. Therefore, the first slider 142 does not move in the vehicle front-rear direction except when the feed screw member 132 rotates, and can support the load from the buckle stay 122. On the other hand, the second slider 144 is separate from the first slider 142 and is installed on the feed screw member 132 using a through-hole 148 having no female screw. The connecting portion 150 between the first slider 142 and the second slider 144 has a structure in which the first slider 142 and the second slider 144 can rotate relatively.

  The buckle device 100 of this embodiment is provided with a lock function for locking the slider 126 at a predetermined position. As illustrated in FIG. 3B, a lock portion 152 is provided on the upper side surface of the first slider 142. On the other hand, as illustrated in FIG. 3A, the cover rail 130 is provided with a receiving portion 154. The lock portion 152 has a convex shape protruding upward, and the receiving portion 154 has a concave shape that is recessed corresponding to the lock portion 152. The lock portion 152 and the receiving portion 154 are formed with teeth that mesh with each other. The buckle device 100 is configured such that the lock portion 152 and the receiving portion 154 mesh with each other so that the position of the slider 126 is maintained and the support rigidity of the buckle stay 122 is further increased.

  The configuration of the buckle device 100 will be further described along the operation when the slider 126 slides. FIG. 4 is a diagram illustrating a process in which the slider 126 of FIG. Assume that the slider 126 is slid toward the rear side of the vehicle as illustrated in FIG. In this case, the feed screw member 132 is rotated upward in FIG.

  The upper first edge 156 and the lower second edge 158 of the opening 136 of the cover rail 130 extend along the longitudinal direction of the feed screw member 132 on both the upper and lower sides of the lock portion 152. FIG. 4B is a cross-sectional view taken along the line CC of the cover rail 130 in FIG. As illustrated in FIG. 4B, the lock portion 152 is provided on the outer surface of the first slider 142 so as to protrude outwardly with the rotation axis of the feed screw member 132 as the center. .

  When the feed screw member 132 is rotated upward in FIG. 4B, since the first slider 142 is installed on the feed screw member 132 by the female screw 146, the first slider 142 also tries to rotate together. However, at this time, since the lock portion 152 interferes with the first edge portion 156, the first slider 142 cannot rotate. As a result, the first slider 142 idles relative to the feed screw member 132, and the first slider 142 is guided by the male screw 134 of the feed screw member 132 of FIG. Slide along the longitudinal direction of the vehicle 132 toward the rear of the vehicle.

  As described with reference to FIG. 3C, the first slider 142 and the second slider 144 are relatively rotatable. Therefore, since the first slider 142 has the female screw 146, a behavior that tends to rotate along the external thread 134 of the feed screw member 132 occurs. Does not occur. Therefore, the second slider 144 can support the buckle stay 122 in a stable posture without swinging or the like.

  When the slider 126 slides while bringing the lock portion 152 into contact with the first edge portion 156 as shown in FIG. 4A, the lock portion 152 eventually reaches the receiving portion 154 as shown in FIG. Engage. At this time, FIG. 4D is a DD cross-sectional view of the cover rail 130 of FIG. 4C. However, since the feed screw member 132 is rotating upward, the lock portion 152 on the first slider 142 is rotated. Is also fitted to the receiving portion 154 in an attempt to rotate upward. In this manner, the slider 126 stops sliding at the position of the receiving portion 154 and enters a locked state in which the position is held.

  The locked slider 126 in FIG. 4C can support the buckle stay 122 with high support rigidity. In this embodiment, as illustrated in FIG. 2A as an example, the receiving portion 154 is provided in the vicinity of the rear end of the cover rail 130 in the vehicle. In the buckle device 100 having these configurations, a state is assumed in which, for example, the buckle stay 122 in FIG. 1 is located on the vehicle rear side. In such a state, even when a sudden load from the occupant is applied from the webbing 104 to the buckle main body 114 and the buckle stay 122 in an emergency or the like, the occupant is supported with high support rigidity and the restraining force is improved. be able to.

  In addition, since the seat belt device 101 includes the pretensioner 120, the pretensioner 120 may be activated and an additional tensile pressure may be applied to the webbing 104 in an emergency. Even in such a case, the webbing 104 can be suitably supported by including the buckle device 100 that can exhibit high support rigidity.

  As illustrated in FIG. 4E, for example, when the slider 126 is to be moved forward of the vehicle, the feed screw member 132 is rotated downward. 4 (f) is a cross-sectional view taken along the line E-E of the cover rail 130 of FIG. 4 (e), and the first slider 142 also attempts to rotate downward, thereby causing the lock portion 152 to be removed from the receiving portion. The lock is released. In this way, the slider 126 can be moved again.

  Here, in the present embodiment, the lock portion 152 is provided on the upper portion of the first slider 142, and the receiving portion 154 is provided on the first edge portion 156 on the upper side of the cover rail 130. However, the positions where the lock portion 152 and the receiving portion 154 are provided are not limited to these. For example, the lock portion 152 is provided below the first slider 142, and the receiving portion 154 is also provided on the second edge 158 below the cover rail 130. A configuration is also possible.

(Second Embodiment)
FIG. 5 is a diagram illustrating a buckle device 200 according to the second embodiment of the invention. In the buckle device 200 illustrated in FIG. 5A, the receiving portion 202 is formed over the entire longitudinal direction of the cover rail 130, and the slider 204 can be locked at any position of the cover rail 130. Thus, the configuration is different from the buckle device 100 of the first embodiment. In addition, about the same component as what was demonstrated in 1st Embodiment, description is abbreviate | omitted by attaching | subjecting the same code | symbol.

  FIG. 5B is an enlarged perspective view of the slider 204 in FIG. The slider 204 includes a first slider 208 on the vehicle front side and a second slider 210 connected to the vehicle rear side of the first slider 208. An elastic connecting member 212 is provided between the first slider 208 and the second slider 210. The elastic connecting member 212 is a member that connects the first slider 208 and the second slider 210 relatively rotatably and elastically. In the present embodiment, the elastic connecting member 212 is realized by a coil spring.

  Similar to the first slider 142 and the second slider 144 of the first embodiment, the first slider 208 is installed on the feed screw member 132 by a female screw 146, and the second slider 144 has no through screw (not shown). ) To be installed on the feed screw member 132.

  The first slider 208 is provided with a protruding portion 214 as a component for preventing rotation by interfering with the cover rail 130 similarly to the lock portion 152 of FIG. The protruding portion 214 is provided on the outer surface of the first slider 208 so as to have a convex shape toward the outside as viewed from the rotational axis of the feed screw member 132. When the feed screw member 132 rotates, the first slider 208 is prevented from rotating because the protrusion 214 interferes with the cover rail 130 (see FIG. 5A), and slides in the longitudinal direction of the feed screw member 132. To do.

  The slider 204 is provided with a lock lever 216 as a component for realizing the lock function. The lock lever 216 is a lever-type member provided on the upper part of the second slider 210 on the vehicle front side. The lock lever 216 has a rotation shaft 218 at the base and can be tilted and raised.

  FIG. 6 is a diagram illustrating a process in which the lock lever 216 of FIG. As illustrated in FIG. 6A, the lock lever 216 is usually installed with the tip 220 tilted toward the first slider 208 side. Here, in the event of an emergency, when an abrupt load is applied to the webbing 104 (FIG. 1) from the occupant, the load toward the front of the vehicle is applied to the second slider 210 via the webbing 104, the buckle body portion, and the buckle stay 122. Can be changed. Then, the elastic connecting member 212 is compressed, and the second slider 210 approaches the first slider 208.

  An inclined surface 222 is provided at an upper portion of the first slider 208 on the rear side of the vehicle at a position facing the lock lever 216. The inclined surface 222 is inclined upward in the front side of the vehicle so that the lock lever 216 is raised. Then, as illustrated in FIG. 6B, when the elastic connecting member 212 is compressed by the load derived from the occupant described above, the lock lever 216 comes into contact with the inclined surface 222 and stands.

  When the lock lever 216 stands up, the lock lever 216 meshes with the receiving portion 202 provided on the first edge portion 156. Accordingly, since the slider 204 is locked and the position thereof is maintained, the buckle device 200 can support the buckle stay 122 with high support rigidity. The receiving portion 202 is set so as to mesh only with the lock lever 216, and does not mesh with the protruding portion 214. Therefore, the slide of the slider 204 is not hindered.

  The lock lever 216 may include a spring element on the rotating shaft 218 and may be tilted by the elastic force of the spring element when not in contact with the inclined surface 222. Further, in the present embodiment, the lock lever 216 is provided on the front upper portion of the second slider 210 and the receiving portion 202 is provided on the first edge 156 on the upper side of the cover rail 130. However, the present invention is not limited to this. Can be provided on the lower part of the front side of the second slider, and the receiving part can be provided on the second edge of the lower side of the cover rail.

  The preferred embodiments of the present invention have been described above with reference to the accompanying drawings. However, the embodiments described above are preferred examples of the present invention, and other embodiments can be implemented by various methods. Can be carried out. The invention is not limited to the detailed shape, size, configuration, and the like of the components shown in the accompanying drawings unless otherwise specified in the present specification. In addition, expressions and terms used in the present specification are for the purpose of explanation, and are not limited thereto unless otherwise specified.

  Therefore, it is obvious for those skilled in the art that various changes and modifications can be conceived within the scope of the claims, and these naturally belong to the technical scope of the present invention. It is understood.

  INDUSTRIAL APPLICABILITY The present invention can be used for a seat belt buckle device that fixes and releases a tongue plate provided on a webbing, and a seat belt device including the seat belt buckle device.

DESCRIPTION OF SYMBOLS 100 ... Buckle apparatus of 1st Embodiment, 101 ... Seat belt apparatus, 102 ... Seat, 103 ... Seat cushion, 104 ... Webbing, 106 ... Retractor, 107 ... Center pillar, 108 ... Through anchor, 110 ... Webbing anchor, 112 ... Tongue plate 114 ... buckle main body 116 116 insertion port 118 release button 120 120 pretensioner 122 buckle stay 123 ... one end of buckle stay 124 shaft member 126 slider 128 128 buckle stay Other end, 130 ... Cover rail, 132 ... Feed screw member, 136 ... Cover rail opening, 138 ... Motor unit, 142 ... First slider, 144 ... Second slider, 146 ... Receiving part, 148 ... Through hole, 150 ... Connecting part DESCRIPTION OF SYMBOLS 152 ... Lock part, 154 ... Receiving part, 156 ... 1st edge part of a cover rail, 158 ... 2nd edge part of a cover rail, 200 ... Buckle apparatus of 2nd Embodiment, 202 ... Receiving part, 204 ... Slider, 208 ... 1st slider, 210 ... 2nd slider, 212 ... Elastic connecting member, 214 ... Projection part, 216 ... Lock lever, 218 ... Rotating shaft of lock lever, 220 ... Tip of lock lever, 222 ... Inclined surface

Claims (6)

A seat belt buckle device for fixing a tongue plate provided on a webbing,
A feed screw member that is installed near the side of the vehicle seat and that is long in the vehicle longitudinal direction and has a screw on the outer periphery;
A slider installed on the feed screw member with a female screw meshing with a male screw of the feed screw member;
A lock portion provided on the outer surface of the slider and having a convex shape toward the outside around the rotation axis of the feed screw member;
A motor unit for rotating the feed screw member;
A cover rail provided around the feed screw member, the cover rail having a first edge and a second edge extending along both sides of the lock portion along a longitudinal direction of the feed screw member. A cover rail that slides the slider in the longitudinal direction of the feed screw member by preventing the rotation of the slider by the first edge or the second edge interfering with the lock portion when rotating.
A buckle stay with one end attached to the slider;
A buckle body part attached to the other end of the buckle stay and into which the tongue plate is inserted;
With
The cover rail is a receiving portion formed in a concave shape at a predetermined position of the first edge portion or the second edge portion, and is engaged with the lock portion on the slider that has been slid to engage the position of the slider. Having a receiving part for holding
The slider is
A first slider provided with the female screw and the lock portion;
A second slider that is separate from the first slider, does not have the female thread, is rotatably connected to the first slider, and is attached to one end of the buckle stay;
A seat belt buckle device comprising:   The seat belt buckle device according to claim 1, wherein the lock portion is provided on an upper portion or a lower portion of the first slider. A seat belt buckle device for fixing a tongue plate provided on a webbing,
A feed screw member that is installed near the side of the vehicle seat and that is long in the vehicle longitudinal direction and has a screw on the outer periphery;
A first slider having a female screw meshing with a male screw of the feed screw member and installed on the feed screw member;
A second slider that is separate from the first slider and does not have the female thread;
An elastic connecting member for elastically connecting the second slider to the rear side of the first slider so as to be rotatable relative to the first slider;
A protrusion that is provided on the outer surface of the first slider and has a convex shape toward the outside as viewed from the rotation axis of the feed screw member;
A lever-type lock lever provided on the vehicle front side of the second slider, which has a predetermined rotation shaft at the base and can be tilted and raised, and has a tip directed toward the first slider. A locking lever,
An inclined surface inclined in a direction in which the lock lever rises at a position facing the lock lever of the first slider;
A motor unit for rotating the feed screw member;
A cover rail provided around the feed screw member, the first edge and the second edge extending along both sides of the lock lever along the longitudinal direction of the feed screw member, and the first edge Alternatively, a receiving portion formed in a concave shape in which only the lock lever meshes at a predetermined position of the second edge portion, and when the feed screw member rotates, the first edge portion or the second edge portion is the protruding portion. A cover rail that slides the first slider and the second slider in the longitudinal direction of the feed screw member by interfering with the first slider to prevent the first slider from rotating.
A buckle stay having one end attached to the second slider;
A buckle body part attached to the other end of the buckle stay and into which the tongue plate is inserted;
With
When a load in front of the vehicle is applied to the second slider, the elastic connecting member is compressed, the lock lever comes into contact with the inclined surface of the first slider, and the lock lever is raised to the first of the cover rail. A seat belt buckle device, wherein the position of the first slider is maintained by engaging with the receiving portion of the edge portion or the second edge portion.   4. The seat belt buckle device according to claim 3, wherein the receiving portion is formed over the entire length of the first edge portion or the second edge portion of the cover rail. 5.   A seat belt device comprising the seat belt buckle device according to any one of claims 1 to 4.   6. The seat belt device according to claim 5, further comprising a pretensioner that pulls the webbing into a retractor in an emergency.

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