JP2003180408A - Buckle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a buckle which can prevent holding/releasing of a tongue plate caused by careless movement of a releasing member such as a releasing button. <P>SOLUTION: A support piece 284 is extended from the base part 272 of a lock member 270. A slider 350 is supported slidable in the projecting direction of the support piece 284 and the opposite direction. In a condition a tongue plate 330 is held, the engaging projection 300 of the releasing button 290 interferes with the tongue plate 330 from the lower side. When the releasing button 290 is finely moved by vibration of a vehicle during running, the slider 350 similarly moves to prevent to change the relative position relation between the engaging projection 300 and the slider 350 or to keep the change extremely small even if the relation changes. Thus the interfering condition of the slider 350 by the engaging projection 300 is not released. Thereby, the releasing button 290 can securely keep the holding condition of the tongue plate 330 in a case the releasing button is finely displaced. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a buckle device constituting a vehicle seat belt device.

[0002]

2. Description of the Related Art A webbing belt, which constitutes a seat belt device for restraining the body of an occupant seated on a vehicle seat, has one longitudinal end thereof wound up by, for example, a winding device provided on the side of the seat. It is locked to the shaft, and the other end is fixed to an anchor plate provided near the winding device. Further, an intermediate portion in the longitudinal direction of the webbing belt is folded back downward through the insertion hole of a through anchor provided above the winding device, for example, on the upper end side of the center pillar of the vehicle.

The webbing belt penetrates through the insertion hole formed in the tongue plate between the folded-back portion of the through anchor and the other end, and the webbing belt is wound around the winding shaft of the winding device by pulling the tongue plate. The removed webbing belt is pulled out. When the webbing belt is pulled out, the tongue plate is connected to the buckle device provided on the side opposite to the winding device via the seat, so that the webbing belt is put on.

As described above, there are several types of buckle devices to which the tongue plates are connected, but basically, the device main body having the tongue plate insertion port,
It can move to and away from the tongue plate inserted into the device body, and by moving closer to the tongue plate, it urges the latch that penetrates the through hole formed in the tongue plate and the tongue plate in the direction to push it out of the device body. It is provided with an ejector and a release button that allows the latch to move in a direction away from the tongue plate when pressed from the outside of the apparatus main body.

Further, there are some kinds of structures in which the latch penetrating the through hole of the tongue plate is restricted by moving in the direction away from the tongue plate. As an example thereof, there is a structure in which the stopper interferes with the latch on the moving direction side of the latch in the direction away from the tongue plate.

In the case of such a structure, the stopper is interfered by the arm extended from the release button in a state of interfering with the latch, and when the release button interferes with the stopper, the stopper does not interfere with the latch. It has a structure that cannot be released. Further, in this type of buckle device, when the release button is pressed and moved, the interference of the stopper by the arm of the release button is released, and the stopper is pressed by the moving release button to release the interference with the latch. The structure is such that the stopper moves in the direction indicated by the arrow.

[0007]

By the way, the release button is normally urged by a spring or the like in the direction substantially opposite to the direction in which the interference of the stopper is released. It can be moved in the direction that cancels the interference with the stopper.

In the movement of the release button due to such vibration of the vehicle, it is basically impossible to push the stopper to move it in the direction of releasing the interference with the latch. However, even in such a case, there is still a possibility that the interference of the release button with the stopper is released. Therefore, further improvement has been desired from the viewpoint of surely holding the tongue plate by the buckle device.

In view of the above facts, an object of the present invention is to provide a buckle device capable of preventing holding release of a tongue plate due to inadvertent movement of a release member such as a release button.

[0010]

The present invention according to claim 1 is a buckle device for holding a tongue plate having a long belt-shaped webbing belt inserted through an insertion hole, wherein the tongue plate is inserted. The main body and the tongue plate inserted into the main body of the apparatus are provided on the main body of the apparatus so as to be movable toward and away from the main body, and when the tongue plate is approached, the tongue plate is engaged with the main body of the apparatus. A latch for restricting movement of the tongue plate in a disengagement direction opposite to the insertion direction of the tongue plate, and a tongue plate provided in the device body and biased in the disengagement direction in the device body. Interlocking with the approach movement of the ejector and the latch to the tongue plate, the latch moves to a regulation position on the opposite side to the approach movement, and the regulation is performed. A restriction member that interferes with the latch in a stationary position and restricts the movement of the latch in a direction away from the tongue plate; and the restriction member while being mechanically connected to the restriction member and maintaining the mechanical connection. A regulation maintaining member that is displaceable in a predetermined direction different from a direction in which the regulation member is disengaged from the regulation position with respect to a member, and that displacement in a direction different from the predetermined direction is limited by the regulation member; Displacement of the regulation maintaining member with respect to the regulation member while restricting displacement of the regulation maintaining member in a direction in which the regulation member moves to the regulation position and interferes with the regulation maintaining member to separate from the regulation position. A predetermined amount of movement in the release direction along the direction releases the interference with the regulation maintaining member, and presses the regulation member in a direction to separate from the regulation position. It is characterized by comprising a dividing member.

In the buckle device having the above structure, when the tongue plate is inserted into the main body of the device against the biasing force of the ejector, the latch moves closer to and engages with the tongue plate. As a result, movement of the tongue plate in the detaching direction opposite to the inserting direction of the tongue plate into the device body is restricted, and the tongue plate is held by the buckle device.

Further, in conjunction with the movement of the tongue plate approaching the latch, the regulating member moves to the regulating position and interferes with the latch. The restriction position is located on the side opposite to the direction in which the latch moves toward the tongue plate with respect to the latch engaged with the tongue plate. Therefore, when the restricting member interferes with the latch at the restricting position, the restricting member restricts the movement of the latch in the direction of separating from the tongue plate, that is, the direction of releasing the engagement with the tongue plate. The movement of the tongue plate to the tongue is maintained.

On the other hand, the regulating member is provided with a regulating maintaining member, and the releasing member interferes with the regulating maintaining member in a state where the regulating member is positioned at the regulating position, so that the interference with the latch is regulated. The movement of the member is restricted (that is, the restriction member indirectly interferes with the release member via the restriction maintaining member).

In this state, when the release member is moved in the release direction by a predetermined amount or more, the interference of the release member with the regulation maintaining member is released, and this movement causes the release member to press the regulation member and separate from the regulation position. The restricting member is moved in the direction indicated by the arrow. As a result, the interference of the regulating member with the latch is released, and the latch can be separated from the tongue plate.
In this state, the latch is separated from the tongue plate, and the biasing force of the ejector for releasing the engagement of the latch with the tongue plate pushes out the tongue plate from the apparatus main body.

By the way, in the present buckle device, the regulation maintaining member is coupled to the regulation member so as to be displaceable in the releasing direction with respect to the regulation member, and the releasing member interferes with the regulation maintaining member due to vibration during traveling of the vehicle. When is trying to move in the releasing direction, the regulation maintaining member also moves in the releasing direction. As described above, when the release member is moved less than the predetermined amount in the release direction, the relative positional relationship between the release member and the regulation maintaining member does not change, or even if the relative positional relationship changes, the change amount is extremely small. Few. Therefore, the movement of the releasing member less than the predetermined amount in the releasing direction does not cancel the interference of the releasing member with the regulation maintaining member.

In addition, although the regulation maintaining member is displaceable in the releasing direction with respect to the regulating member as described above, the mechanical connection with the regulating member is maintained even in the displaced state, and further in the releasing direction and the opposite direction. The displacement of the regulation maintaining member in different directions is limited by the regulation member. Therefore,
Even if the regulation maintaining member is displaced in the releasing direction as described above, the movement of the regulating member in the direction of separating from the regulating position remains regulated (that is, the releasing member with respect to the regulating member via the regulating maintaining member Indirect interference is not released).

As a result, even if the releasing member moves in the releasing direction due to, for example, vibration while the vehicle is running, the holding of the tongue plate by the buckling device is released unless the moving amount at this time is more than the predetermined amount. Never,
It is possible to prevent the careless release of the tongue plate.

In the present invention, the regulating member may be composed of a single component, or a combination of a plurality of components may be used as the regulating member.

According to a second aspect of the present invention, in the buckle device according to the first aspect, there is provided a biasing means for biasing the regulation maintaining member in a direction opposite to the releasing direction.

In the buckle device having the above structure, when the releasing member moves in the releasing direction by a predetermined amount or more and the interference of the releasing member with the regulating member is released, the urging force of the urging means moves the regulating maintaining member in the releasing direction. Move in the opposite direction. As a result, the regulation maintaining member returns to the original state.

In the present buckle device, the urging means may have a structure for urging the regulation maintaining member in a direction opposite to the releasing direction. For example, the urging means connects the regulation maintaining member and the regulating member. It may be configured to.

According to a third aspect of the present invention, in the buckle device according to the first or second aspect, the buckle device can be moved by inertia when the device body moves in the predetermined direction or a direction including a component of the predetermined direction. The inertia maintaining member is used as the regulation maintaining member.

In the buckle device having the above structure, for example, when the vehicle body is moved in a predetermined direction or in a direction including a component of the predetermined direction due to vibration or the like while the vehicle is running, when the releasing member tries to move due to inertia at this time, The inertial mass body, which is the regulation maintaining member, similarly moves by inertia. Therefore, the relative positional relationship between the releasing member and the inertial mass body (regulation maintaining member) does not change, or the relative positional relationship changes only slightly. As a result, the interference of the release member with the regulating member via the inertial mass body (regulation maintaining member) is not released.

[0024]

BEST MODE FOR CARRYING OUT THE INVENTION <Structure of this Embodiment> FIG. 1 is an exploded perspective view showing the structure of a buckle device 210 according to one embodiment of the present invention, and FIG. 3 is this buckle device. The structure of 210 is shown in cross-section.

As shown in FIG. 3, the buckle device 21
0 has a case 214. The case 214 is a box-shaped tubular member with both ends in the longitudinal direction opened, and an opening at one end in the longitudinal direction is an anchor insertion opening 216 and an opening at the other end in the longitudinal direction is a tongue insertion opening 218. There is.
In addition, a base 220 that constitutes the main body of the apparatus is housed inside the case 214.

As shown in FIGS. 1 and 3, the base 2
20 is provided with a flat plate-like bottom plate 222 which is elongated along the longitudinal direction of the case 214. A substantially plate-shaped anchor plate 224 as an anchor member is superposed on one end side in the longitudinal direction of the bottom plate 222, and a through hole 226 formed in the bottom plate 222 and an anchor plate longitudinally extending in the longitudinal direction of the bottom plate 222. The bottom plate 222 and the anchor plate 224 are mechanically connected to each other by a rivet 230 that penetrates a through hole 228 formed in the hole 224. The other end of the anchor plate 224 is fixed to the vehicle body (both not shown) at the side of the seat of the vehicle, whereby the buckle device 210 is attached to the vehicle.

On the other hand, side walls 232 are provided upright in the thickness direction of the bottom plate 222 from both widthwise ends of the bottom plate 222, and ejectors 234 are arranged between the side walls 232.
A part of the ejector 234 is engaged with a guide hole 236 formed in the bottom plate 222, and can be slid along the guide hole 236 in the longitudinal direction of the bottom plate 222 by a predetermined range.

Further, as shown in FIG. 6, the bottom plate 222 is
From the end of the guide hole 236 on one side in the longitudinal direction of
An engagement protrusion 238 is formed to project, and one end of the compression coil spring 240 is locked. The other end of the compression coil spring 240 is pressed against one end of the ejector 234, and the ejector 234 is biased toward the other end of the bottom plate 222 in the longitudinal direction by the biasing force of the compression coil spring 240.

On the other hand, as shown in FIGS. 1 and 3, the buckle device 210 includes a latch 250. The latch 250 comprises a base 252. Although depending on the posture of the latch 250, the base portion 252 is formed in a flat plate shape having a longitudinal direction substantially along the facing direction of the side walls 232 and a thickness direction along the longitudinal direction of the bottom plate 222. Both ends in the longitudinal direction of the base portion 252 are inserted into the support holes 254 as support portions formed on the both side walls 232, and the base portion 252 (that is, the latch 250) is until the base portion 252 interferes with the inner peripheral portion of the support hole 254. It is supported so as to be rotatable by a predetermined angle with the longitudinal direction of 252 as the axial direction.

Further, a flat plate-like connecting portion 256 extends from one end in the width direction of the base portion 252 on the side of the intermediate portion in the longitudinal direction toward one side in the width direction of the base portion 252, and further, the connecting portion 25.
An engaging piece 258 extends from the side opposite to the base portion 252 of 6 toward the bottom plate 222 side.

The tip portion of the engaging piece 258 (more specifically, the end portion on the side opposite to the connecting portion side with the connecting portion 256).
Corresponds to the through hole 260 formed in the bottom plate 222, and the engaging piece 258 is caused by the displacement of the latch 250.
Can enter the through hole 260.

A mounting piece 262 is integrally provided on one surface (opposite the bottom plate 222) of the ejector 234 in the thickness direction corresponding to the tip of the engaging piece 258 of the latch 250. There is. As described above, the urging force of the compression coil spring 240 acts on the ejector 234.

However, basically, the compression coil spring 24
When the ejector 234 is located at the arrival position when no external force other than the urging force of 0 is applied, the ejector 234 generally faces the tip of the engaging piece 258 along the thickness direction of the bottom plate 222. The mounting piece 262 is provided on the engaging piece 2
The mounting piece 262 is engaged with the engaging piece 25 in a state of facing the tip portion of 58.
The movement of the engaging piece 258 (that is, the movement of the latch 250) in the direction of approaching the bottom plate 222 is regulated by interfering with the tip portion of the No. 8 portion.

Further, stoppers 264 are extended from both longitudinal ends of the base 252. The stopper 264 is
The tip side is formed so as to be positioned on the slide locus of the ejector 234 that resists the urging force of the compression coil spring 240. When the ejector 234 slides a predetermined distance against the urging force of the compression coil spring 240, the ejector 234 It contacts the stopper 264.

Further, a lock member 270 which constitutes a restricting member is arranged on the side of the base 220 opposite to the bottom plate 222 via the connecting portion 256 of the latch 250. The lock member 270 includes a base portion 272. The base portion 272 has a substantially rectangular rod shape extending in the longitudinal direction along the facing direction of the side walls 232.

Both ends of the base portion 272 enter into engagement holes 274 formed in the side walls 232. The engagement hole 274 is formed on the other end side of the side wall 232 in the longitudinal direction with respect to the through hole 260, and the base portion 272 is supported by the side wall 232 so as to be rotatable about its own longitudinal axis.

Further, in the longitudinal middle portion of the base portion 272,
A substantially plate-shaped contact portion 280 is formed. Abutment part 280
Are formed corresponding to the engagement pieces 258 of the latch 250 in a state of being separated from the bottom plate 222, and the engagement pieces 258 in a state of being separated from the bottom plate 222 abut on the abutting portion 280.

Further, a narrow plate-shaped pressed portion 362 is formed in the longitudinal middle portion of the base portion 272. The width direction of the pressed portion 362 is inclined upward (on the side opposite to the bottom plate 222) with respect to the direction opposite to the protruding direction of the support piece 284 described above.

Further, on both longitudinal ends of the base 272,
A pair of support pieces 284 is formed. Although depending on the rotational posture of the lock member 270 around the base portion 272, these support pieces 284 are generally long along the longitudinal direction of the bottom plate 222 and are formed to project from the base portion 272 toward the anchor insertion port 216 side. It is shaped like a square rod.

On these supporting pieces 284, a regulation maintaining member and a slider 350 as an inertial mass body are supported. As shown in FIGS. 1 and 2, the slider 350
Is provided with a flat plate-shaped base portion 352 extending in the longitudinal direction along the opposing direction of the side walls 232. The base 3 is provided on one side in the thickness direction of the base 352 (the upper side opposite to the bottom plate 222).
A pair of restriction walls 354 are erected so as to face each other in the longitudinal direction of 52.

The surface of each restriction wall 354 opposite to the surface on the opposite side (that is, the surface facing the outer side in the longitudinal direction of the base 352) is a restriction surface and supports the slider 350 on the support piece 284. In this state, the regulation surface faces the support piece 284 along the longitudinal direction of the base 352.

The distance from the restricting surface of the one restricting wall 354 along the longitudinal direction of the base 352 to the restricting surface of the other restricting wall 354 is larger than the distance between the pair of support pieces 284 along the longitudinal direction of the base 352. It is said to be extremely large,
When the slider 350 tries to displace in the opposite direction of the side walls 232 with respect to the support piece 284, the support piece 284 interferes with the regulation surface of the regulation wall 354 and regulates the displacement of the slider 350.

Further, an engaging piece 358 is provided upright from one end side of the base portion 352 in the width direction (anchor insertion port 216 side) corresponding to each supporting piece 284. The engagement piece 358 is bent into a substantially L-shape (more specifically, a substantially L-shape rotated to be upside down) in a side view, and a part thereof is substantially parallel to one surface of the base 352. The plate-shaped engaging portion 360 is formed.

The distance between the base portion 352 and the engagement portion 360 is formed to be slightly larger than the thickness dimension of the support piece 284, and each support piece 284 corresponds to the engagement portion 360 and the base portion 352. And the engaging portion 360 is located between the
The slider 350 is attached to the support piece 284 by being supported by the slider 4. In this state, when the slider 350 tries to displace with respect to the support piece 284 along the thickness direction of the base portion 352, the support piece 284 interferes with the engaging portion 360 or the base portion 352 to restrict the displacement of the slider 350.

That is, as shown in FIGS. 3 and 5, the slider 350 can be displaced with respect to the support piece 284 along the protruding direction of the support piece 284, but the slider 350 can be displaced in other directions. The support piece 284 regulates this.

Further, as shown in FIGS. 1 and 2,
On the surfaces of the both side walls 232 facing each other, which correspond to the base 352, on the surfaces facing each other, the restricting protrusion 36 serving as a displacement restricting means.
4 are formed. The restriction protrusions 364 are formed so as to engage with the base portion 352 in a state where the slider 350 is displaced by a predetermined amount along the protruding direction of the support piece 284, and the restriction protrusions 364 engage with the base portion 352 (interference). By doing so, further displacement of the slider 350 is restricted.

On the other hand, on the base portion 352, a pair of spring locking projections 366 are provided upright. Each of these spring locking projections 366 is formed in a substantially columnar shape, and is formed so as to be opposed between itself in the radial direction between the pair of restriction walls 354 described above.

Further, these spring locking projections 36
A spring engaging piece 368 having a substantially block shape is formed on the base portion 352 between 6 and 6.

Further, a spring 370 is provided on the base 352 as a biasing means in the claims. The spring 370 includes a substantially concave main body 372 that opens toward the base 272 side of the lock member 270 in a plan view. The main body 372 is provided on the base portion 352 in a state of interfering with the spring engagement piece 368 from the side opposite to the base portion 272 via the spring engagement piece 368 described above.

Further, at both ends of the main body 372, locking portions 374 wound in a coaxial coil shape are continuously formed. With the main body 372 placed on the base 352,
The spring locking protrusion 366 described above penetrates the locking portion 374, thereby preventing the spring 370 from being accidentally detached from the base portion 352.

Both ends of the spring 370, which are opposite to the main body 372 via the engaging portion 374, wrap around to the side opposite to the slider 350 via the base portion 272 of the lock member 270 and engage with the base portion 272. I am fit. Accordingly, when the slider 350 is displaced with respect to the support piece 284 so as to be separated from the lock member 270, the spring 37
A biasing force of 0 attempts to return the slider 350 to its original position.

On the other hand, as shown in FIGS. 1 and 3, the buckle device 210 has a release button 290 as a release member.
Is equipped with. The release button 290 includes a pressing portion 292 for pressing operation (release operation). The pressing portion 292 has a plate-like shape whose pressing surface faces the other end of the bottom plate 222 in the longitudinal direction, and extends in the longitudinal direction along the facing direction of the side walls 232.

Side walls 294 extend from both ends in the longitudinal direction of the pressing portion 292 toward one end in the longitudinal direction of the bottom plate 222. These side walls 294 face each other along the facing direction of the side wall 232 described above, and the bottom plate 22
The end portion on the opposite side to 2 is connected by an upper wall 296, and has a generally concave shape that opens toward the bottom plate 222.

Further, the pressing portion 292 of the upper wall 296 described above.
The end portion on the side opposite to the portion corresponds to the pressed portion 362 formed on the base portion 272 of the lock member 270 described above, and at the predetermined rotation position of the lock member 270 around the base portion 272,
Release button 29 when pressing force is applied to the pressing portion 292
The end portion of the upper wall 296 and the pressed portion 36 along the moving direction of 0.
2 is opposite.

Arms 298 extend from ends of the side walls 294 opposite to the pressing portion 292 so as to face each other along the facing direction of the side walls 294. Engagement protrusions 300 are formed at the tips of both arms 298 toward the other arm 298, and enter into the guide holes 302 formed in the side wall 232. Guide hole 30
2 is a long hole which is long along the longitudinal direction of the bottom plate 222. The engagement protrusion 300 is displaceable within a predetermined range along the longitudinal direction of the bottom plate 222 by the inner peripheral portion of the guide hole 302, whereby the guide button 302 causes the release button 290 to move in the longitudinal direction of the bottom plate 222. It is regulated.

Further, the engaging projections 300 of both arms 298
Is the slider 350 described above, as shown in FIG.
It is possible to interfere with the (base 352), and the lock member 2
70 is a predetermined angle above its base 272 (ie,
In a state in which the engaging projection 300 is rotated to the side opposite to the bottom plate 222, the engaging projection 300 is below the base 352 of the slider 350 (that is,
Interference from the bottom plate 222 side). This allows the base 272
The downward rotation of the surrounding slider 350 is restricted.

On the other hand, between the pressing portion 292 and the lock member 270, a stopper 310 which is a regulating member together with the lock member 270 is arranged. The stopper 310 is
It is provided with a plate-shaped base portion 312 extending in the longitudinal direction along the facing direction of the side wall 294. A pair of substantially fan-shaped lock pieces 320 are formed on both ends of the base portion 312 in the longitudinal direction. The lock piece 320 corresponds to the contact pieces 278 extending from both ends of the connecting portion 256 (latch 250) in the width direction. As shown in FIG.
It is in contact with 78.

As shown in FIG. 3, the stopper 3
A compression coil spring 318 is disposed between the pressure button 292 and the pressing portion 292 of the release button 290, and one end of the compression coil spring 318 abuts on the side opposite to the pressing surface of the pressing portion 292. On the other hand, the other end of the compression coil spring 318 is in contact with the base portion 312 of the stopper 310, whereby the
The stopper 310 is urged in a direction in which it is separated from the pressing portion 292.

On the other hand, as shown in FIG. 4, the tongue plate 330 is inserted between the above-mentioned side walls 232 from the other end side in the longitudinal direction of the bottom plate 222. As shown in FIG. 1, the tongue plate 330 includes a base portion 332 formed of a metal plate material. The tongue plate 330 is inserted into the base portion 332 between the side wall 232 and the side wall 23.
A slit hole 334 is formed as a through hole that is long in the opposing direction of 2, and the longitudinal intermediate portion of the long belt-shaped webbing belt 340 is inserted.

The webbing belt 340 has a base end portion locked to a take-up shaft of a webbing take-up device (not shown), and a spiral coil spring or the like for urging the take-up shaft in the winding direction of the webbing belt 340. The storage urging force of the take-up shaft urging means of (1) acts on the webbing belt 340.

An insertion plate portion 336 is formed on the base portion 332. Since the width dimension of the insertion plate portion 336 is smaller than the space between the side walls 232, the insertion plate portion 336 of the tongue plate 330 is actually inserted between the side walls 232 (see FIG. 4).

The insertion plate portion 336 is formed with a through hole 338 penetrating in the thickness direction.
In the state in which it reaches a predetermined position on the one end side in the longitudinal direction of the bottom plate 222 between 32, the above-mentioned engagement piece 258 can be penetrated, and the engagement piece 258 penetrates the through hole 338, so that Removal of the tongue plate 330 is restricted.

<Operations and Effects of this Embodiment> Next, operations and effects of this embodiment will be described.

In this buckle device 210, when the insertion plate portion 336 of the tongue plate 330 is inserted from the tongue insertion opening 218 of the case 214 in the non-attached state shown in FIG. 3, the tip of the insertion plate portion 336 is the end portion of the ejector 234. To push the ejector 234 against the urging force of the compression coil spring 240 and slide the ejector 234 to one end of the bottom plate 222 in the longitudinal direction.

When the ejector 234 slides toward the one end in the longitudinal direction of the bottom plate 222 by a predetermined amount, the mounting piece 262 of the ejector 234 and the engaging piece 258 of the latch 250 are released from each other, and the ejector 234 is latched by the latch 250.
The stopper 264 is pressed to rotate the latch 250.

As a result, the tip of the engaging piece 258 moves closer to the bottom plate 222. Further, in this state, the through hole 338 of the insertion plate portion 336 and the through hole 260 formed in the bottom plate 222 overlap each other. Therefore, in this state, as shown in FIG. 3, the rotated engagement piece 258 penetrates the through hole 338 of the insertion plate portion 336 and the through hole 260 of the bottom plate 222.

When the latch 250 rotates, the contact state between the engaging piece 258 of the latch 250 and the contact portion 280 of the lock member 270 is released. Where the lock piece 3
20 is a compression coil spring 3 via a stopper 310.
18, the lock member 270 is rotated upward by the urging force of the compression coil spring 318 so as to be linked to the rotation of the latch 250, and the lock piece 320 contacts the contact piece 278 of the latch 250. . Therefore, the engagement piece 2
Rotation of the latch 250 in a direction in which 58 is separated from the bottom plate 222 is restricted, whereby the tongue plate 330 is attached to the buckle device 210 (state shown in FIG. 4).

On the other hand, as shown in FIG. 4, the base 352 of the slider 350 provided on the lock member 270 is latched 250 toward the bottom plate 222 at one end in the width direction.
The arm 29 of the release button 290 in the state before the rotation
Although it interferes with the engaging protrusion 300 formed on the No. 8, the latch 250 rotates as described above, and the lock member 270 rotates due to the biasing force of the compression coil spring 318.
The slider 350 rotates while pressing the engagement protrusion 300 against the anchor insertion port 216.

Further, when the slider 350 is rotated to a predetermined position, the interference of the engaging projection 300 by the base portion 352 is released, so that the urging force of the compression coil spring 318 causes the other end of the bottom plate 222 in the longitudinal direction (that is, The release button 290 is displaced to the tongue insertion port 218 side). As a result, the engagement protrusion 300 is moved downward (from the bottom plate 222 side) to the base portion 3.
Interfere with 52.

As a result, the downward rotation of the slider 350 is restricted by the engagement protrusion 300. Further, as described above, in the slider 350, the base portion 352, the regulation wall 354, and the engagement portion 360 regulate the displacement of the support piece 284 in the directions other than the projecting direction and the opposite direction thereof. By restricting the rotation of 350, the downward rotation of the lock member 270 indirectly engages the projection 3
It is regulated by 00. Therefore, the lock member 270 cannot be rotated unless the restriction of rotation of the slider 350 by the engagement protrusion 300 is released, and further, the contact state of the lock piece 320 with the contact piece 278 of the latch 250 is released. Can not.

On the other hand, when the lock piece 320 is in contact with the contact piece 278, the compression coil spring 31
When the pressing portion 292 of the release button 290 is pressed against the urging force of 8 and the release button 290 is pushed into the case 214 by a predetermined amount or more, the engagement protrusion 300 and the base 352 are released from the facing state. The rotation restriction of the slider 350 is released. Further, by pushing the release button 290, the end portion of the upper wall 296 of the release button 290 pushes the pressed portion 362. As a result, the support member 284 rotates the lock member 270 around the base 272 in the direction of approaching the bottom plate 222. Further, in this way, the lock member 270 is connected to the base 272.
By rotating around, the stopper 310 pressed by the base portion 272 rotates, whereby the contact state of the lock piece 320 with the contact piece 278 of the latch 250 is released.

When the release button 290 is pushed in, a part of the release button 290 interferes with the latch 250, and the release button 290 pushes up the latch 250.
As a result, the engagement piece 258 is inserted into the through hole 260 of the bottom plate 222.
And, it comes out from the through hole 338 of the insertion plate portion 336. In this state, basically, the movement of the tongue plate 330 in the detaching direction opposite to the inserting direction is not restricted. Get out. As a result, the tongue plate 330 is released from the buckle device 210.

By the way, when the tongue plate 330 is attached to the buckle device 210 and the vibration or the like during traveling of the vehicle acts on the release button 290, the release button 290 is moved into the case 214 even though no pressing force is applied. It may move slightly.

Here, as shown in FIG. 5, in the buckle device 210, the slider 350 with which the engaging projection 300 interferes from below can be displaced in the projecting direction with respect to the supporting piece 284, so that Inertia during vibration of the base 35
2 (that is, the slider 350) is displaced similarly to the release button 290.

As described above, basically, the displacement direction of the slider 350 with respect to the support piece 284 is limited to the protruding direction of the support piece 284 and the opposite direction, and the displacement in the other directions is restricted. Therefore, the slider 35
Even when 0 is displaced, the slider 350 is supported by the support piece 284, so that the rotation of the lock member 270 is restricted by the engagement protrusion 300 via the slider 350.
Therefore, even in this state, the attachment state of the tongue plate 330 to the buckle device 210 can be reliably maintained.

Further, as described above, in the normal releasing operation (pressing operation of the releasing button 290), the engaging protrusion 300 moves by a predetermined amount or more, but in this case, unlike the above-mentioned vibration, the basic operation is basically different. In addition, the slider 350 does not move due to inertia, and only the release button 290 moves due to the pressing force.
Therefore, the above-mentioned release is smoothly performed.

Further, when the slider 350 is displaced by a predetermined amount due to the above-mentioned vibration or friction with the engaging projection 300,
The restricting protrusions 364 formed on both side walls 232 make the slider 3
It interferes with the base portion 352 of 50 and restricts further displacement of the base portion 352. As a result, the slider 350 and the support piece 2
The mechanical connection with 84 is not inadvertently released. Moreover, the biasing force of the spring 370 causes the slider 35 to move.
Return 0 to its original position. Therefore, the mechanical connection between the slider 350 and the support piece 284 can be maintained.

[0078]

As described above, in the buckle device according to the present invention, the careless release of the tongue plate can be prevented.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of a buckle device according to an embodiment of the present invention.

FIG. 2 is a plan view showing a configuration of a regulation member.

FIG. 3 is a sectional view of the buckle device according to the embodiment of the present invention at an appropriate position.

FIG. 4 is a sectional view corresponding to FIG. 3 showing a holding state of a tongue plate.

FIG. 5 is a cross-sectional view showing a state of the regulation maintaining member with respect to the regulation member when the releasing member is slightly displaced.

FIG. 6 is a rear view of a base forming the apparatus body.

[Explanation of symbols]

210 Buckle device 214 case (device body) 220 base (apparatus body) 234 ejector 250 latch 270 Lock member (restriction member) 290 Release button (release member) 310 Stopper (Regulating member) 330 tongue plate 334 Slit hole (insertion hole) 340 webbing belt 350 Slider (regulation maintaining member, inertial mass body) 370 spring (biasing means)

Claims (3)

[Claims] 1. A buckle device for holding a tongue plate having a long belt-shaped webbing belt inserted through an insertion hole, the device body into which the tongue plate is inserted, and the tongue plate inserted into the device body. Is provided in the apparatus main body so as to be movable toward and away from the apparatus main body, and engages with the tongue plate by approaching the tongue plate to move in a detaching direction opposite to the inserting direction of the tongue plate into the apparatus main body. A latch that restricts movement of the tongue plate, an ejector that is provided in the apparatus body and urges the tongue plate inserted in the apparatus body in the detaching direction, and an approach movement of the latch to the tongue plate. The latch moves to a regulation position on the side opposite to the approaching movement of the latch, and interferes with the latch at the regulation position to prevent the tongue from moving. A restricting member that restricts the movement of the latch in a direction away from the rate, and the restricting member is mechanically connected to the restricting member and is restricted from the restricting position with respect to the restricting member while maintaining the mechanical connection. A regulation maintaining member that is displaceable in a predetermined direction different from the direction in which the member is disengaged and whose displacement in a direction different from the predetermined direction is limited by the regulation member; and the regulation member has moved to the regulation position. A predetermined amount in the releasing direction along the displacement direction of the regulation maintaining member with respect to the regulation member, while limiting the displacement of the regulation maintaining member in the state of interfering with the regulation maintaining member and separating from the regulation position. And a releasing member that releases the interference with the regulation maintaining member by the above movement and presses the regulation member in a direction of separating from the regulation position. Buckle device. 2. The buckle device according to claim 1, further comprising a biasing unit that biases the regulation maintaining member in a direction opposite to the releasing direction. 3. The regulation maintaining member is an inertial mass body that is movable by inertia when the apparatus main body moves in the predetermined direction or in a direction including a component of the predetermined direction. Alternatively, the buckle device according to claim 2.