JP3875549B2 - Buckle device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a buckle device constituting a seat belt device of a vehicle.
[0002]
[Prior art]
A webbing belt constituting a seat belt device for restraining the body of an occupant seated in a vehicle seat has one end in the longitudinal direction locked to, for example, a take-up shaft of a take-up device provided on the side of the seat. The other end is fixed to an anchor plate provided in the vicinity of the winding device. Further, the intermediate portion in the longitudinal direction of the webbing belt is folded downward through the through-hole of the through anchor provided above the winding device, for example, at the upper end side of the center pillar of the vehicle.
[0003]
The webbing belt passes through the insertion hole formed in the tongue plate between the folded part and the other end of this through anchor, and the webbing wound around the winding shaft of the winding device by pulling the tongue plate The belt is pulled out. When the webbing belt is pulled out, the tongue plate is connected to the buckle device provided on the opposite side of the winding device via the seat, so that the webbing belt is attached.
[0004]
As described above, there are several types of buckle devices to which the tongue plate is connected. Basically, however, the device main body having the tongue plate insertion port and the tongue plate inserted in the device main body are The latch penetrates the through-hole formed in the tongue plate by moving closer to the tongue plate, the ejector for urging the tongue plate in the direction to push out the device body, and the pressure from the outside of the device body Thus, a release button is provided that enables the latch to move away from the tongue plate.
[0005]
There are also several types of structures that are restricted by a latch that penetrates the through hole of the tongue plate moving in a direction away from the tongue plate. As an example, there is a structure in which a stopper interferes with the latch on the moving direction side of the latch in a direction away from the tongue plate.
[0006]
In such a structure, the stopper is interfered by an arm or the like extended from the release button while interfering with the latch, and the stopper cannot interfere with the latch when the release button interferes with the stopper. It has become. Furthermore, this kind of buckle device releases the interference of the stopper by the release button arm, etc. when the release button is pressed and moves, and also releases the interference to the latch by the stopper being pressed by the moving release button. The stopper moves in the direction of the movement.
[0007]
[Problems to be solved by the invention]
By the way, the release button is normally urged by a spring or the like in a direction substantially opposite to the direction in which the interference of the stopper is released, but it moves in a direction to release the interference with the stopper due to a slight vibration of the vehicle. it can.
[0008]
In such movement of the release button due to vehicle vibration or the like, basically, the stopper cannot be pressed and moved in a direction to release interference with the latch. However, even in such a case, there is still a possibility that the interference with the stopper by the release button is released. Therefore, further improvement has been desired from the viewpoint of securely holding the tongue plate by the buckle device.
[0009]
An object of the present invention is to obtain a buckle device that can prevent the tongue plate from being released due to inadvertent movement of a release member such as a release button in consideration of the above facts.
[0010]
[Means for Solving the Problems]
  The present invention according to claim 1 is a buckle device in which a long belt-like webbing belt holds a tongue plate inserted through an insertion hole, the device main body into which the tongue plate is inserted, and the device main body inserted into the device main body.BeforeA latch that engages with the tongue plate by approaching the tongue plate and restricts the movement of the tongue plate in the disengagement direction opposite to the insertion direction of the tongue plate into the device body; And an ejector for urging the tongue plate inserted in the apparatus main body in the detaching direction, and the tongue plateIn the direction of approachingOf the latchTransferLinked to the movementMoveMoveFrom the opposite side to the moving direction of the latch when engaging the tongue plate by this movementA restricting member that interferes with the latch and restricts movement of the latch in a direction away from the tongue plate;A predetermined direction different from the moving direction of the restricting member when moving away from the position interfering with the latchRelease directionWhatPredeterminedofMore than quantityInMoveTo dosoThe movement of the restricting member when leaving the position where it interferes with the latchA release member that presses the restriction member in a direction and mechanically connected to the restriction member., Displacement in a direction different from the release direction is limited by the restriction member, andWhile maintaining the connectionCancelCan be displaced in the directionAnd the movement of the restriction member in a direction away from the position where the restriction member interferes with the latch due to the interference. A restriction maintaining member in which interference from the release member is released by movement of the release member to a predetermined amount or more,It is characterized by having.
[0011]
  In the buckle device configured as described above, against the urging force of the ejector.Inserted into the device bodyTongue plateInlatchIs approachingEngageWhen,The movement of the tongue plate in the disengagement direction opposite to the direction in which the tongue plate is inserted into the apparatus main body is restricted, and the tongue plate is held by the buckle device.
[0012]
  Also,When the latch moves toward the tongue plate, thisRegulating member in conjunction with movementMovedMovementAnd the restriction member from the opposite side of the tongue plateInterfere with the latch. This makes the latchThe movement of the latch in the direction away from the tongue plate, that is, the direction in which the engagement with the tongue plate is released is restricted by the restriction member, and thereby the movement restriction of the tongue plate in the disengagement direction is maintained.
[0013]
  On the other hand, the regulation member is provided with a regulation maintenance member,Interfere with the latchWhen the release member interferes with the restriction maintaining member with the restriction member positioned at the position,Away from the position where it interferes with the latchMovement of the restricting member in a direction to release the interference with the latch is restricted (that is, the restricting member is indirectly interfered with the releasing member via the restriction maintaining member).
[0014]
  In this state, the release member is more than a predetermined amount in the release directionInWhen moved, the interference of the release member to the restriction maintaining member is released, and the release member presses the restriction member by this movement,Interfere with the latchFrom positionLeaveThe restriction member is moved in the direction. Thereby, the interference of the restricting 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 urging force of the ejector that releases the engagement of the latch with the tongue plate pushes the tongue plate out of the apparatus main body.
[0015]
By the way, in this buckle device, the restriction maintaining member is connected to the restriction member so as to be displaceable in the release direction with respect to the restriction member, and the release member interfering with the restriction maintenance member due to vibration during vehicle traveling is the release direction. When trying to move to, the restriction maintaining member also moves in the release direction. Thus, when the release member moves less than the predetermined amount in the release direction, even if the relative positional relationship between the release member and the regulation maintaining member does not change or the relative positional relationship changes, the change amount is extremely large. There are few. For this reason, the movement of the release member less than the predetermined amount in the release direction does not release the interference with the restriction maintaining member by the release member.
[0016]
  In addition, the regulation maintaining member can be displaced in the release direction with respect to the regulation member as described above.NaThe connection is maintained, and the displacement of the restriction maintaining member with respect to the direction different from the release direction and the opposite direction is limited by the restriction member. Therefore, even if the restriction maintaining member is displaced in the release direction as described above,Interfere with the latchFrom positionLeaveThe movement of the restricting member in the direction remains restricted (that is, indirect interference of the releasing member with the restricting member via the restriction maintaining member is not released).
[0017]
Thereby, for example, even if the release member moves in the release direction due to vibration or the like during traveling of the vehicle, the holding of the tongue plate by the buckle device is not released as long as the movement amount at this time is not a predetermined amount or more. Unintentional release of the tongue plate can be prevented.
[0018]
In the present invention, the restricting member may be composed of a single part, or a combination of a plurality of parts may be used as the restricting member.
[0019]
According to a second aspect of the present invention, in the buckle device according to the first aspect of the present invention, the buckle device includes an urging unit that urges the restriction maintaining member in a direction opposite to the release direction.
[0020]
In the buckle device configured as described above, when the release member moves a predetermined amount or more in the release direction and the interference of the release member to the restriction member is released, the urging force of the urging means causes the restriction maintaining member to move in a direction opposite to the release direction. Move to. Thereby, a regulation maintenance member returns to an original state.
[0021]
In this buckle device, the urging means may be configured to urge the restriction maintaining member in the direction opposite to the release direction. For example, the urging means is configured to connect the restriction maintaining member and the restriction member. Also good.
[0022]
  According to a third aspect of the present invention, in the buckle device according to the first or second aspect,The regulation maintaining member isSaidCanceldirectionOrOf the aboveCancelMoves with inertia when the device body moves in a direction that includes a direction componentDoIt is characterized by that.
[0023]
  In the buckle device configured as described above, for example, due to vibration during vehicle traveling,CanceldirectionOr releaseIf the device body moves in the direction including the direction component and the release member tries to move due to inertia at this time,MaterialSimilarly, it moves with inertia. For this reason, the release memberAnd regulationsMaintenance DepartmentWith materialThe relative positional relationship does not change, or the relative positional relationship changes little. This, RegulationMaintenance DepartmentMaterialThe interference between the release member and the regulating member is not released.
[0024]
DETAILED DESCRIPTION OF THE INVENTION
<Configuration of the present embodiment>
FIG. 1 is an exploded perspective view showing the structure of a buckle device 210 according to an embodiment of the present invention, and FIG. 3 is a cross-sectional view showing the structure of the buckle device 210.
[0025]
As shown in FIG. 3, the buckle device 210 includes a case 214. The case 214 is a box-shaped cylindrical member that is open at both ends in the longitudinal direction, the opening at one end in the longitudinal direction is an anchor insertion port 216, and the opening at the other end in the longitudinal direction is a tongue insertion port 218. Yes. In addition, a base 220 constituting the apparatus main body is accommodated inside the case 214.
[0026]
As shown in FIGS. 1 and 3, the base 220 includes a flat bottom plate 222 that is elongated along the longitudinal direction of the case 214. A substantially plate-shaped anchor plate 224 as an anchor member is superimposed on one end side in the longitudinal direction of the bottom plate 222, and the anchor plate is elongated along the longitudinal direction of the bottom plate 222 and the through hole 226 formed in the bottom plate 222. The bottom plate 222 and the anchor plate 224 are mechanically connected by a rivet 230 that passes through the through hole 228 formed in the 224. The other end side of the anchor plate 224 is fixed to the vehicle body (both not shown) at the side of the vehicle seat, whereby the buckle device 210 is attached to the vehicle.
[0027]
On the other hand, side walls 232 are erected from both ends in the width direction of the bottom plate 222 in the thickness direction of the bottom plate 222, and ejectors 234 are disposed between the side walls 232. A part of the ejector 234 engages with a guide hole 236 formed in the bottom plate 222, and can slide within a predetermined range along the guide hole 236 in the longitudinal direction of the bottom plate 222.
[0028]
Further, as shown in FIG. 6, an engagement protrusion 238 protrudes from the end of the guide hole 236 on one side in the longitudinal direction of the bottom plate 222, and one end of the compression coil spring 240 is locked. ing. 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 in the longitudinal direction of the bottom plate 222 by the biasing force of the compression coil spring 240.
[0029]
Meanwhile, as shown in FIGS. 1 and 3, the buckle device 210 includes a latch 250. The latch 250 includes a base 252. Although depending on the posture of the latch 250, the base 252 is generally formed in a flat plate shape that is longitudinal in the opposing direction of the side walls 232 and is in the thickness direction along the longitudinal direction of the bottom plate 222. Both end portions in the longitudinal direction of the base portion 252 enter support holes 254 as support portions formed on both side walls 232, and the base portion 252 (that is, the latch 250) is in the base portion until it interferes with the inner peripheral portion of the support hole 254. The longitudinal direction of 252 is supported so as to be rotatable by a predetermined angle.
[0030]
In addition, a flat plate-like connecting portion 256 extends from one end in the width direction of the base portion 252 in the longitudinal direction toward one side in the width direction of the base portion 252, and is opposite to the base portion 252 of the connecting portion 256. From the side, an engagement piece 258 extends toward the bottom plate 222 side.
[0031]
The distal end portion of the engagement piece 258 (more specifically, the end portion opposite to the connection portion side with the connection portion 256) corresponds to the through hole 260 formed in the bottom plate 222, and the latch 250 is By displacing, the engagement piece 258 can enter the through hole 260.
[0032]
A mounting piece 262 is integrally provided on the surface of one side in the thickness direction of the ejector 234 (the side opposite to the bottom plate 222) corresponding to the tip of the engaging piece 258 of the latch 250. As described above, the urging force of the compression coil spring 240 acts on the ejector 234.
[0033]
However, the engagement piece generally extends along the thickness direction of the bottom plate 222 in a state in which the ejector 234 is positioned at a reaching position in a state where an external force other than the urging force of the compression coil spring 240 is not applied. A mounting piece 262 is provided so as to face the front end portion of 258, and the mounting piece 262 interferes with the front end portion of the engaging piece 258 in a state of facing the front end portion of the engaging piece 258 to the bottom plate 222. The movement of the engagement piece 258 in the approaching direction (that is, the movement of the latch 250) is restricted.
[0034]
Further, stoppers 264 extend from both ends of the base portion 252 in the longitudinal direction. The stopper 264 is formed so that the tip side is positioned on the slide locus of the ejector 234 resisting the biasing force of the compression coil spring 240, and when the ejector 234 slides a predetermined distance against the biasing force of the compression coil spring 240. The ejector 234 contacts the stopper 264.
[0035]
Further, a lock member 270 constituting a restricting member is disposed on the side opposite to the bottom plate 222 of the base 220 via the connecting portion 256 of the latch 250. The lock member 270 includes a base 272. The base portion 272 has a substantially square bar shape that is a longitudinal direction along the opposing direction of the side walls 232.
[0036]
Both end portions of the base portion 272 enter engagement holes 274 formed in both side walls 232. The engaging hole 274 is formed on the other end side in the longitudinal direction of the side wall 232 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 direction around the axis.
[0037]
Further, a substantially plate-like contact portion 280 is formed in the middle portion of the base portion 272 in the longitudinal direction. The contact portion 280 is formed corresponding to the engagement piece 258 of the latch 250 in a state of being separated from the bottom plate 222, and the engagement piece 258 in a state of being separated from the bottom plate 222 is in contact with the contact portion 280. .
[0038]
Further, a narrow plate-like pressed portion 362 is formed at the intermediate portion in the longitudinal direction of the base portion 272. The pressed part 362 is inclined upward (to 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.
[0039]
In addition, a pair of support pieces 284 are formed on both ends of the base portion 272 in the longitudinal direction. These support pieces 284 are formed so as to be elongated along the longitudinal direction of the bottom plate 222 and protrude from the base 272 toward the anchor insertion port 216, depending on the rotational posture of the lock member 270 around the base 272. It is a square bar shape.
[0040]
  These support pieces 284 have a restriction maintaining portion.With materialThe slider 350 is supported. As shown in FIGS. 1 and 2, the slider 350 includes a flat plate-like base portion 352 that is formed in a longitudinal direction along the opposing direction of the side walls 232. On one side in the thickness direction of the base portion 352 (upper side opposite to the bottom plate 222), a pair of restriction walls 354 are provided upright so as to face the longitudinal direction of the base portion 352.
[0041]
The surface opposite to the surface of each regulating wall 354 opposite to each other (that is, the surface facing the outside in the longitudinal direction of the base portion 352) is a regulating surface, and the slider 350 is supported by the support piece 284 Then, the regulating surface faces the support piece 284 along the longitudinal direction of the base 352.
[0042]
The distance from the regulating surface of one regulating wall 354 along the longitudinal direction of the base 352 to the regulating surface of the other regulating wall 354 is slightly smaller than the distance between the pair of support pieces 284 along the longitudinal direction of the base 352. When the slider 350 is about to be displaced in the opposing direction of the side walls 232 with respect to the support piece 284, the support piece 284 interferes with the restriction surface of the restriction wall 354 and restricts the displacement of the slider 350.
[0043]
Engagement pieces 358 are erected from the width direction one end side (anchor insertion port 216 side) of the base portion 352 corresponding to each support piece 284. The engagement piece 358 is bent into a substantially L shape (more specifically, a substantially L shape rotated so as to be upside down) in a side view, and a part thereof is substantially parallel to one surface of the base 352. A plate-like engaging portion 360 is formed.
[0044]
The interval between the base 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 is between the corresponding engagement portion 360 and the base portion 352. Thus, the slider 350 is attached to the support piece 284 by the engagement portion 360 being supported by the support piece 284. In this state, when the slider 350 attempts to displace relative to the support piece 284 along the thickness direction of the base portion 352, the support piece 284 interferes with the engagement portion 360 or the base portion 352 and restricts the displacement of the slider 350.
[0045]
That is, as shown in FIGS. 3 and 5, the slider 350 can be displaced along the protruding direction of the support piece 284 with respect to the support piece 284, but the displacement of the slider 350 in the other direction is not supported by the support piece 284. 284 regulates this.
[0046]
Further, as shown in FIGS. 1 and 2, restriction projections 364 as displacement restriction means are formed on the surfaces of the opposite side walls 232 described above corresponding to the base 352. These restricting 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 restricting protrusions 364 engage with the base portion 352 (interference). Thus, further displacement of the slider 350 is restricted.
[0047]
On the other hand, a pair of spring locking projections 366 are erected on the base 352. Each of these spring locking projections 366 is formed in a substantially cylindrical shape, and is formed so as to be opposed to each other in the radial direction between the pair of regulating walls 354 described above.
[0048]
Further, a substantially block-shaped spring engagement piece 368 is formed on the base 352 between the spring locking projections 366.
[0049]
On the base 352, a spring 370 is provided as an urging means in the scope of claims. The spring 370 includes a substantially concave main body 372 that opens toward the base 272 side of the lock member 270 in plan view. The main body 372 is provided on the base 352 in a state of interfering with the spring engagement piece 368 from the side opposite to the base 272 via the spring engagement piece 368 described above.
[0050]
Further, a locking portion 374 wound in a coaxial coil shape is continuously formed at both ends of the main body 372. In the state where the main body 372 is disposed on the base portion 352, the above-described spring locking protrusion 366 penetrates the locking portion 374, thereby preventing the spring 370 from being inadvertently detached from the base portion 352.
[0051]
Further, both end portions of the spring 370 opposite to the main body 372 via the engaging portion 374 wrap around the opposite side of the slider 350 via the base portion 272 of the lock member 270 and engage with the base portion 272. Yes. 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 urging force of the spring 370 attempts to return the slider 350 to the original position.
[0052]
On the other hand, as shown in FIGS. 1 and 3, the buckle device 210 includes a release button 290 as a release member. The release button 290 includes a pressing portion 292 for pressing operation (release operation). The pressing portion 292 has a plate shape in which the pressing surface faces the other end in the longitudinal direction of the bottom plate 222, and is a longitudinal direction along the opposing direction of the side walls 232.
[0053]
Side walls 294 extend from the vicinity of 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 are opposed to each other along the opposing direction of the side wall 232 described above, and the end opposite to the bottom plate 222 is connected by the top wall 296, and is opened toward the bottom plate 222 as a whole. It is a concave shape.
[0054]
Further, the end portion of the upper wall 296 opposite to the pressing portion 292 corresponds to the pressed portion 362 formed on the base portion 272 of the locking member 270 described above, and the locking member 270 around the base portion 272 is predetermined. In the rotation position, the end portion of the upper wall 296 and the pressed portion 362 face each other along the moving direction of the release button 290 when a pressing force is applied to the pressing portion 292.
[0055]
Arms 298 extend from opposite ends of the side walls 294 opposite to the pressing portions 292 so as to face each other along the opposing direction of the side walls 294. Engaging protrusions 300 are formed at the distal ends of both arms 298 toward the other arm 298 and enter guide holes 302 formed in the side wall 232. The guide hole 302 is a long long hole along the longitudinal direction of the bottom plate 222. The engagement protrusion 300 can be displaced by a predetermined range along the longitudinal direction of the bottom plate 222 by the inner peripheral portion of the guide hole 302, so that the movement direction of the release button 290 is moved in the longitudinal direction of the bottom plate 222 by the guide hole 302. It is regulated.
[0056]
Further, as shown in FIG. 4, the engagement protrusions 300 of both arms 298 are capable of interfering with the slider 350 (base portion 352) described above, and the lock member 270 moves upward by a predetermined angle around the base portion 272 (that is, In the state of being rotated to the side opposite to the bottom plate 222, interference occurs from the lower side of the base portion 352 of the engaging protrusion 300 slider 350 (that is, the bottom plate 222 side). Thereby, the downward rotation of the slider 350 around the base portion 272 is restricted.
[0057]
On the other hand, between the pressing portion 292 and the lock member 270, a stopper 310 that constitutes a regulating member together with the lock member 270 is disposed. The stopper 310 includes a plate-like base portion 312 that has a longitudinal direction along the opposing direction of the side wall 294. A pair of substantially fan-shaped lock pieces 320 are formed on both ends of the base 312 in the longitudinal direction. The lock piece 320 corresponds to the contact piece 278 extended from both ends in the width direction of the connecting portion 256 (latch 250), and the lock piece 320 contacts the contact piece 278 as shown in FIG. ing.
[0058]
As shown in FIG. 3, a compression coil spring 318 is disposed between the stopper 310 and the pressing portion 292 of the release button 290, and one end of the compression coil spring 318 faces away from the pressing surface of the pressing portion 292. It is in contact. On the other hand, the other end of the compression coil spring 318 is in contact with the base 312 of the stopper 310, thereby urging the stopper 310 in the direction of separating from the pressing portion 292.
[0059]
On the other hand, as shown in FIG. 4, a tongue plate 330 is inserted between the side walls 232 described above from the other end 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 base 332 is formed with a slit hole 334 as an insertion hole extending in the opposite direction of the side wall 232 in a state where the tongue plate 330 is inserted between the side walls 232. The middle part in the longitudinal direction is inserted.
[0060]
The webbing belt 340 is locked at its base end to a take-up shaft of a webbing take-up device (not shown), and is wound by a spiral coil spring or the like for urging the take-up shaft in the direction of winding the webbing belt 340. The housing urging force of the shaft urging means acts on the webbing belt 340.
[0061]
An insertion plate portion 336 is formed on the base portion 332. The width of the insertion plate portion 336 is smaller than the interval between the side walls 232, and actually, the insertion plate portion 336 of the tongue plate 330 is inserted between the side walls 232 (see FIG. 4).
[0062]
A through hole 338 that penetrates in the thickness direction is formed in the insertion plate portion 336, and when the insertion plate portion 336 reaches a predetermined position on one end side in the longitudinal direction of the bottom plate 222 between the side walls 232, The joint piece 258 can be penetrated, and the engagement piece 258 penetrates the through hole 338, so that the tongue plate 330 can be prevented from being extracted from the buckle device 210.
[0063]
<Operation and effect of the present embodiment>
Next, the operation and effect of the present embodiment will be described.
[0064]
In the buckle device 210, when the insertion plate portion 336 of the tongue plate 330 is inserted from the tongue insertion port 218 of the case 214 in the non-mounted state shown in FIG. 3, the distal end portion of the insertion plate portion 336 contacts the end portion of the ejector 234. The ejector 234 is slid to one end side in the longitudinal direction of the bottom plate 222 against the urging force of the compression coil spring 240.
[0065]
When the ejector 234 slides by a predetermined amount toward one end in the longitudinal direction of the bottom plate 222, the opposed state of the mounting piece 262 of the ejector 234 and the engaging piece 258 of the latch 250 is released, and the ejector 234 releases the stopper 264 of the latch 250. The latch 250 is rotated by pressing.
[0066]
As a result, the tip of the engagement piece 258 moves closer to the bottom plate 222. 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. Therefore, in this state, as shown in FIG. 3, the rotated engagement piece 258 passes through the through hole 338 of the insertion plate portion 336 and the through hole 260 of the bottom plate 222.
[0067]
Further, when the latch 250 rotates, the contact state between the engagement piece 258 of the latch 250 and the contact portion 280 of the lock member 270 is released. Here, since the lock piece 320 receives the urging force of the compression coil spring 318 via the stopper 310, the lock member 270 is rotated upward by the urging force of the compression coil spring 318 in conjunction with the rotation of the latch 250. The lock piece 320 contacts the contact piece 278 of the latch 250. For this reason, the rotation of the latch 250 in the direction in which the engagement piece 258 is separated from the bottom plate 222 is restricted, and thereby the tongue plate 330 is attached to the buckle device 210 (the state shown in FIG. 4).
[0068]
On the other hand, as shown in FIG. 4, the base 352 of the slider 350 provided on the lock member 270 has the release button 290 in a state before the latch 250 is rotated in the direction approaching the bottom plate 222 at one end in the width direction. Although it interferes with the engagement protrusion 300 formed on the arm 298, the latch 250 rotates as described above, and the lock member 270 rotates due to the urging force of the compression coil spring 318. Is pressed against the anchor insertion port 216, and the slider 350 rotates.
[0069]
Further, when the slider 350 is rotated to a predetermined position, the engagement protrusion 300 is released from the interference by the base 352. Therefore, the other end in the longitudinal direction of the bottom plate 222 (that is, the tongue insertion port) by the urging force of the compression coil spring 318. 218 side), the release button 290 is displaced. Thereby, the engagement protrusion 300 interferes with the base 352 from below (the bottom plate 222 side).
[0070]
Thereby, the downward rotation of the slider 350 is restricted by the engagement protrusion 300. Further, as described above, the slider 350 is regulated by the base portion 352, the regulating wall 354, and the engaging portion 360 so that the displacement of the support piece 284 in the direction other than the protruding direction and the opposite direction is regulated. By restricting the rotation of 350, the downward rotation of the lock member 270 is indirectly restricted by the engagement protrusion 300. Therefore, the lock member 270 cannot be rotated unless the restriction of the rotation of the slider 350 by the engagement protrusion 300 is released, and furthermore, the contact state of the lock piece 320 with respect to the contact piece 278 of the latch 250 is released. Can not.
[0071]
On the other hand, in such a state that the lock piece 320 is in contact with the contact piece 278, the pressing portion 292 of the release button 290 is pressed against the urging force of the compression coil spring 318, and the release button 290 is moved to the inside of the case 214. When a predetermined amount or more is pushed in, the opposing state of the engagement protrusion 300 and the base 352 is released, and the rotation restriction of the slider 350 is released. Furthermore, when the release button 290 is pushed in, the end of the upper wall 296 of the release button 290 presses the pressed portion 362. As a result, the lock member 270 rotates around the base portion 272 in the direction in which the support piece 284 approaches the bottom plate 222. Further, when the lock member 270 is rotated around the base portion 272 in this manner, the stopper 310 pressed by the base portion 272 is rotated, whereby the contact state of the lock piece 320 with respect to the contact piece 278 of the latch 250 is rotated. Is released.
[0072]
Further, when the release button 290 is pushed in, a part of the release button 290 interferes with the latch 250, and the latch 250 is pushed up by the release button 290. As a result, the engagement piece 258 comes out of the through hole 260 of the bottom plate 222 and the through hole 338 of the insertion plate portion 336. In this state, basically, the movement in the disengagement direction opposite to the insertion direction of the tongue plate 330 is not restricted, so that the tongue plate 330 is removed from the case 214 by the urging force of the compression coil spring 240 via the ejector 234. Get out. As a result, the tongue plate 330 is released from being attached to the buckle device 210.
[0073]
When the tongue plate 330 is attached to the buckle device 210 and vibration or the like during traveling of the vehicle acts on the release button 290, the release button 290 slightly moves into the case 214 even though no pressing force is applied. There are things to do.
[0074]
Here, as shown in FIG. 5, in this buckle device 210, the slider 350 with which the engaging projection 300 interferes from below can be displaced in the protruding direction with respect to the support piece 284. The base 352 (that is, the slider 350) is displaced in the same manner as the release button 290 due to the inertia.
[0075]
As described above, the displacement direction of the slider 350 relative to the support piece 284 is basically only the protruding direction of the support piece 284 and the opposite direction, and the displacement in other directions is restricted. For this reason, even when the slider 350 is displaced as described above, the rotation of the lock member 270 is regulated by the engagement protrusion 300 via the slider 350 by the slider 350 being supported by the support piece 284. . Therefore, even in this state, the mounting state of the tongue plate 330 to the buckle device 210 can be reliably maintained.
[0076]
Further, as described above, in a normal release operation (pressing operation of the release button 290), the engagement protrusion 300 moves by a predetermined amount or more. In this case, the slider 350 is basically different from the vibration described above. Does not move by inertia, and only the release button 290 moves by pressing force. Therefore, the release described above is performed smoothly.
[0077]
Further, when the slider 350 is displaced by a predetermined amount due to the vibration or the friction with the engaging protrusion 300, the restricting protrusion 364 formed on the both side walls 232 interferes with the base portion 352 of the slider 350, and the base portion 352 beyond that. Regulate the displacement of. Thus, the mechanical connection between the slider 350 and the support piece 284 is not inadvertently released. Moreover, the biasing force of the spring 370 returns the slider 350 to its original position. For this reason, the mechanical connection between the slider 350 and the support piece 284 can be maintained.
[0078]
【The invention's effect】
As described above, the buckle device according to the present invention can prevent inadvertent release of the tongue plate.
[Brief description of the 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 regulating member.
FIG. 3 is a cross-sectional view at an appropriate position of a buckle device according to an embodiment of the present invention.
FIG. 4 is a cross-sectional view corresponding to FIG. 3 showing a holding state of the tongue plate.
FIG. 5 is a cross-sectional view showing a state of the restriction maintaining member with respect to the restriction member when the release member is slightly displaced.
FIG. 6 is a rear view of a base constituting the apparatus main body.
[Explanation of symbols]
  210 Buckle device
  214 Case (device main body)
  220 base (main unit)
  234 Ejector
  250 latch
  270 Locking member (regulating member)
  290 Release button (release member)
  310 Stopper (Regulator)
  330 tongue plate
  334 Slit hole (insertion hole)
  340 webbing belt
  350 Slider (Regulatory Maintenance DepartmentMaterial)
  370 Spring (biasing means)

Claims (3)

A buckle device for holding a tongue plate in which a long belt-like webbing belt is inserted into an insertion hole,
An apparatus body into which the tongue plate is inserted;
Limiting movement of the tongue plate in the opposite withdrawal direction to the insertion direction of the tongue plate into the apparatus main body engaged with the tongue plate by approaching the inserted pre Symbol tongue plate in the apparatus main body A latch to
An ejector provided in the apparatus main body, for urging the tongue plate inserted in the apparatus main body in the detachment direction;
Interlocked to move to move the latch in the direction of approaching the tongue plate, the moving direction of the latch when engaging the tongue plate by the movement interfering from the opposite side to the latch A restricting member that restricts movement of the latch in a direction away from the tongue plate;
By moving more than a predetermined amount to a different predetermined release direction from the moving direction of the restricting member when away from a position interfering with the latch, the moving direction of the restricting member when away from a position interfering with the latch A release member for pressing the regulating member;
It is mechanically connected to the restricting member, and displacement in a direction different from the releasing direction is limited by the restricting member, and is provided to be displaceable in the releasing direction while maintaining the connection with the restricting member. The restriction member is interfered with the release member in a state of interfering with the latch, and the interference restricts the movement of the restriction member in a direction away from the position where the restriction member interferes with the latch, and the release in the release direction. A restriction maintaining member in which interference from the release member is released by movement of the member over a predetermined amount;
A buckle device comprising: Urging means for urging the restriction maintaining member in a direction opposite to the release direction;
The buckle device according to claim 1. The regulating maintaining member is a buckle apparatus according to claim 1 or claim 2, wherein the moving by inertia when the main assembly in the direction moves including the releasing direction or the releasing direction component of.

Images