JPH0666310U - Buckle device - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a buck device capable of preventing the lock plate and the tongue plate from being disengaged by the inertial movement of the lock pin without increasing the biasing force of the lock pin or the like. obtain. When an inertial force in the direction of arrow A acts while the lock plate 28 is engaged with the tongue plate 12, the inertial body 70 moves the inertial member 70 before the release knob 54, the lock pin holder 56, and the lock pin 62 move inertially. 7
The resin spring 78 is elastically deformed via
Inertia moves in the direction of arrow A against the urging force of. At this time,
The arm member 72 rotates clockwise around the lock pin 62 integrally with the lock pin 62 at the lock position,
The engagement claw 76 engages with the engagement hole 34A of the lock plate 28. As a result, inertial movement of the lock pin 62 is prevented, and the tongue plate engagement state of the lock plate 28 is maintained.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a buckle device used in a seatbelt device and into which a tongue plate is inserted and engaged.

[0002]

[Prior art]

 As a buckle device used for seat belt devices, when the tongue plate is inserted, the tip of the lock plate moves on a line (part of the arc) that is substantially orthogonal to the insertion direction of the tongue plate, and is formed on the tongue plate. There is widely known a buckle device having a so-called bar structure that is inserted into the engaging opening and is prevented from being detached from the buckle body by being blocked by the lock plate in this inserted state.

Some buckle devices of this type are provided with a lock pin for holding the lock plate in a tongue plate engagement state. The lock pin is movable between a lock position that holds the lock plate in the tongue plate engagement state and a release position that allows the lock plate to be released from the tongue plate engagement state, and is engaged with the tongue plate. It has the feature that the resultant strength can be set high.

[0004]

[Problems to be solved by the device]

 However, in the above-mentioned buckle device with a barb structure, even when an inertial force acts from the lock position direction of the lock pin to the release position direction, the lock pin moves to the release position and the lock plate and the tongue plate are separated. The spring biasing force of the lock pin and the lock plate had to be increased so that the engagement of the tongue plate would not be disengaged, and thus a large force was required to disengage the tongue plate.

The present invention has been made in view of the above circumstances, and an object of the present invention is to move the lock plate and the tongue plate by inertial movement of the lock pin without increasing the biasing force of the lock pin or the lock plate. An object of the present invention is to provide a buckle device that can effectively prevent the engagement from being released.

[0006]

[Means for Solving the Problems]

 The present invention is a buckle device for use in a seat belt device, in which a tongue plate is inserted and engaged, the buckle body and a buckle body swingably supported by the buckle body to engage or disengage with the tongue plate. The lock plate that is in the engaged state, the lock position that is supported by the buckle body and that maintains the engagement state of the lock plate with the tongue plate in the insertion / removal direction of the tongue plate, and the engagement state is released. The lock pin movable between the release position and the release position is provided so as to be reciprocally movable in the insertion / extraction direction of the tongue plate, and is urged in the extraction direction of the tongue plate by the first urging means. The release knob and the tongue plate are reciprocally movable along the inserting / removing direction of the tongue plate, and are attached to the release knob side by the second urging means. A lock pin holder, an inertial body that is slidably installed in the release knob along the insertion / extraction direction of the tongue plate, and one end fixed to the lock pin so that the tongue plate insertion direction of the inertial body is fixed. Of the arm member which is integrally rotated with the lock pin by the movement of the lock pin and the lock pin holder, and which biases the arm member toward the inertial body. Elastic urging means having a smaller urging force than that of the means, and an engaging member that is provided integrally with the lock pin and that engages with the lock plate when the lock pin rotates at the lock position of the lock pin, It is characterized by having.

[0007]

[Action]

 According to the above structure, when the lock plate is engaged with the tongue plate and an inertial force acts from the lock position of the lock pin toward the release position, the first biasing means biases the release knob in the tongue plate releasing direction. And the biasing force of the second biasing means for biasing the lock pin holder toward the release knob side are larger than the biasing force of the elastic biasing means for biasing the arm member toward the inertial body. The inertial body elastically deforms the elastic biasing means via the arm member before the cuppin holder, and thus the lock pin, inertially moves in the tongue plate insertion direction against the biasing force of the elastic biasing means. At this time, the arm member rotates around the lock pin at the lock position integrally with the lock pin, and the engaging member integrally provided on the lock pin engages with the lock plate. As a result, inertial movement of the lock pin from the lock position to the release position is prevented, and the engagement state of the lock plate with the tongue plate is maintained. Therefore, it is possible to prevent the engagement between the lock plate and the tongue plate from being released by the inertial movement of the lock pin without increasing the spring biasing force of the lock pin or the like.

[0008]

【Example】

 An embodiment of the present invention will be described below with reference to FIGS.

FIG. 1 schematically shows the tongue plate engagement state of the buckle device 10 of the present embodiment, and FIG. 2 schematically shows the tongue plate withdrawn state of the buckle device 10. As shown in these drawings, in the buckle device 10, a buckle body 18 is arranged between the upper cover 14 and the lower cover 16.

As shown in the exploded perspective view of FIG. 4, the buckle body 18 is formed with a pair of leg plate portions 24 on both sides in the width direction of the flat plate portion 22 so as to be bent between the pair of leg plate portions 24. The tongue plate 12 is inserted through an opening 25 (see FIGS. 1 and 2) formed between the upper cover 14 and the lower cover 16.

An ejector 26 and a lock plate 28 are provided between the pair of leg plate portions 24 of the buckle body 18 as shown in FIGS.

The ejector 26 is inserted and arranged in a guide hole 30 formed in the flat plate portion 22 of the buckle body 18, and is movable in the tongue plate insertion / extraction direction (arrows A and B in FIGS. 1 and 2). ing. The ejector 26 is fitted with the other end of a compression coil spring 32 (shown in FIG. 4) whose one end is locked to the buckle body 18 at the end in the tongue plate insertion direction (direction of arrow A in FIG. 1, FIG. 2). The compression coil spring 32 urges the tongue plate withdrawal direction (arrow B direction in FIGS. 1 and 2).

The tip of the tongue plate 12 is brought into contact with the ejector 26 when the tongue plate 12 is inserted. The tongue plate 12 removes the ejector 26 from the tongue plate withdrawal state shown in FIG. The tongue plate is inserted as shown in FIG. 1 while moving in the insertion direction (direction of arrow A in FIG. 2).

The lock plate 28 is arranged with its longitudinal direction substantially along the tongue plate insertion / extraction direction (arrows A and B in FIGS. 1 and 2), and the tongue plate extraction direction (arrows B in FIGS. 1 and 2). A U-shaped portion 34 is formed at the end on the (direction) side so that the tip is bent downward at a substantially right angle. The tip portion of the U-shaped portion 34 is used as an engaging portion 38 for engaging with the engaging hole 36 of the tongue plate 12, and the engaging portion 38 is shown in FIG. As described above, the tongue plate 12 is engaged with the tongue plate 12. An upward rising portion 40 is formed at an end portion of the lock plate 28 on the side opposite to the U-shaped portion 34 in the tongue plate insertion direction (direction of arrow A in FIGS. 1 and 2).

As shown in FIG. 4, the rising portion 40 is wide in the width direction of the lock plate, and the locking plate 28 is attached to the pair of leg plate portions 24 of the buckle body 18 at both end portions of the rising portion 40 in the width direction of the locking plate. Are supported and hung between the leg plates 24. That is, a substantially triangular notch 42 is formed at the end of the leg plate portion 24 in the tongue plate insertion direction (direction of arrow A in FIGS. 1 and 2), and the lock plate 28 extends into the notch 42. Both end portions in the width direction of the lock plate are inserted so that the tongue plate engaging / disengaging direction (directions of arrows C and D in FIGS. 1 and 2) can be pivoted about the top portion 42A of the notch 42.

Further, the longitudinal dimension of the top portion 42A of the notch 42 is larger than the wall thickness of the rising portion 40 of the lock plate 28, and the lock plate 28 can be slightly moved in the arrow A direction or the arrow B direction. It is like this.

As shown in FIG. 2, when the tongue plate is pulled out, the lock plate 28 is brought into contact with the top surface of the ejector 26 at the tip of the engaging portion 38 to disengage from the tongue plate 12 (see an arrow in FIG. 2). It is in a state of being swung in the D direction).

As shown in FIG. 4, the lock plate 28 has a downward bent portion 44 formed at an intermediate portion in the longitudinal direction between the U-shaped portion 34 and the rising portion 40, and the tongue shown in FIG. When the bent portion 44 is pressed in the tongue plate insertion direction (direction of arrow A in FIG. 2) from the plate withdrawn state, it is rocked in the direction of engagement with the tongue plate 12 (direction of arrow C in FIG. 2). Has become. The bent portion 44 corresponds to the end portion of the block 46 integrally provided on the upper surface of the ejector 26 on the side of the tongue plate insertion direction (direction of arrow A in FIG. 1 and FIG. 2), and the ejector 26 is shown in FIG. When the tongue plate 12 is inserted from the tongue plate pulled-out state, the bent portion 44 is pressed in the tongue plate insertion direction (arrow A direction in FIG. 2) to lock the lock plate 28 in the tongue plate engagement direction (arrow C direction in FIG. 2). As shown in FIG. 1, it is moved in the insertion direction of the tongue plate while swinging. As the lock plate 28 swings at this time, the tip of the engaging portion 38 is fitted into the engaging hole 36 of the tongue plate 12 as shown in FIG. 1 and engaged with the tongue plate 12.

A spring holder 48 is attached to the lock plate 28 by being locked to the rising portion 40. The spring holder 48 is fitted with one end of a compression coil spring 50 as a first biasing means and another compression coil spring 52 (shown in FIG. 4) as a second biasing means. The other ends of these compression coil springs 50 and 52 (shown in FIG. 4) are closer to the tongue plate withdrawal direction (direction of arrow B in FIGS. 1 and 2) than the spring holder 48, respectively, and the release knob 54 and the lock pin holder 56. The release knob 54 and the lock pin holder 56 are urged by the compression coil springs 50 and 52 in the tongue plate extraction direction (arrow B direction in FIGS. 1 and 2), respectively.

The release knob 54 is located at a position closer to the tongue plate withdrawing direction (arrow B direction in FIGS. 1 and 2) than the lock pin holder 56, and the tongue plate inserting and withdrawing direction (arrow directions A and B in FIGS. 1 and 2). Is provided so as to be reciprocally movable along the axis of the tongue plate and is movable in the tongue plate insertion direction (direction of arrow A in FIGS. 1 and 2) against the biasing force of the compression coil spring 50 (shown in FIG. 4). At the end of the release knob 54 on the tongue plate insertion direction side (arrow A direction in FIGS. 1 and 2), a block 58 is provided so as to project in the tongue plate insertion direction (arrow direction A in FIGS. 1 and 2). The block 58 penetrates a rectangular hole 60 (shown in FIG. 4) provided at the upper end of the lock pin holder 56 so as to be movable in the axial direction, and corresponds to the upper end of the rising portion 40 of the lock plate 28. . In this block 58, the release knob 54 moves in the tongue plate insertion direction (the arrow A direction in FIG. 1) from the engaged state of the tongue plate shown in FIG. 1 against the biasing force of the compression coil spring 50 (shown in FIG. 4). When the lock plate 28 is moved, it abuts against the upper end of the rising portion 40 of the lock plate 28 and presses the rising portion 40 of the lock plate 28 to move the lock plate 28 in the disengagement direction of the tongue plate 12 (see the arrow in FIG. 1). While swinging in the D direction), it is moved in the insertion direction of the tongue plate. The lock plate 28 is adapted to be pulled out from the engagement hole 36 of the tongue plate 12 from the engagement state of the tongue plate shown in FIG.

The lock pin holder 56 is biased by the compression coil spring 52 (shown in FIG. 4) and is outside the leg plate portion 24 of the buckle body 18 in the tongue plate engagement state, as shown in FIG. The lock pin 62 is sandwiched between the lock knob 62 and the release knob 54. The lock pin 62 is supported by the buckle body 18 by inserting both ends in the axial direction into bearing holes 64 provided in the leg plate portion 24 of the buckle body 18. The bearing hole 64 is a long hole extending in the tongue plate insertion / extraction direction (arrow A, B direction in FIGS. 1 and 2), and supports the lock pin 62 movably in the tongue plate insertion / extraction direction. .

The lock pin 62 corresponds to the positioning plate portion 66 provided on the lock plate 28. As shown in FIG. 4, the positioning plate portion 66 extends in the lock plate width direction from an intermediate portion substantially orthogonal to the engaging portion 38 of the U-shaped portion 34, and is shown in FIG. 1 in the tongue plate engaging state. As shown in FIG. 2, when the tongue plate is pulled out, the lock pin 62 is made to correspond to the end face of the peripheral edge portion on the side of the tongue plate insertion direction (direction of arrow A in FIG. 2). There is.

More specifically, when the tongue plate is engaged, the lock pin 62 is sandwiched between the lock pin holder 56 and the release knob 54 as shown in FIG. Corresponding. When the lock pin 62 corresponds to the upper surface of the positioning plate portion 66 (lock position), the lock plate 28 is prevented from swinging in the tongue plate disengagement direction (direction of arrow D in FIG. 1) by the lock pin 62. From this tongue plate engagement state, the lock pin 62 is moved in the tongue plate insertion direction (the direction of arrow A in FIG. 1) to move the tongue plate insertion direction side (release) from the end face of the positioning plate portion 66 on the tongue plate insertion direction side. When the lock plate 28 is in the position (position), the lock plate 28 can swing in the tongue plate disengagement direction (direction of arrow D in FIG. 1).

Further, in the present embodiment, the rectangular parallelepiped inertial body 70 is provided in the release knob 54 so as to be slidable along the direction of inserting and removing the tongue plate (direction of arrows A and B in FIGS. 1 and 2). There is. Further, a cutout portion 54A is formed at an end portion of the release knob 54 on the tongue plate insertion direction side (directions of arrows A and B in FIGS. 1 and 2). This is because the free end of the arm member 72, which will be described later, is brought into contact with the end face of the inertial body 70 on the side of the tongue plate insertion direction (direction of arrow A in FIG. 1) in the tongue plate engagement state shown in FIG. .

As shown in FIG. 4, an engaging claw 76 as an engaging member is integrally provided at one end of the arm member 72, and the arm member 72 and the engaging claw 76 are the engaging claws. The portion corresponding to 76 is integrally fixed in a state of being fitted to the metal member 74 having a substantially ⅓ arc-shaped cross section, which is partially removed. On the other hand, a notched portion having a crescent-shaped cross section (not shown) is formed in the middle portion in the longitudinal direction of the lock pin 62 so that the engaging claw 76 fits therein. The arm member 72 and the engaging claw 76 are fixed to the outer peripheral surface of the metal lock pin 62 by welding or the like via the member 74. In this way, the arm member 72 is provided so as to project outward in the radial direction of the lock pin 62, and can be raised and lowered about the lock pin 62 in the clockwise and counterclockwise directions of FIGS. Has been done.

The upper surface of the lock pin holder 56 extends from the tongue plate insertion direction (direction of arrow A in FIG. 1 and FIG. 2) toward the direction of removing the tongue plate (direction of arrow B in FIG. 1 and FIG. 2). After the installation, a resin vane 78 as an elastic urging means having a shape that rises substantially upward at right angles is integrally provided. As shown in FIGS. 1 and 2, the resin spring 78 is in contact with the free end (the other end) of the arm member 72, and particularly in the tongue plate engagement state shown in FIG. The inertial body 70 is urged through the tongue plate withdrawing direction (direction of arrow B in FIG. 1). The biasing force of the resin panel 78 is set to be smaller than the biasing force of the compression coil springs 50 and 52.

Further, in the tongue plate engagement state shown in FIG. 1, the engagement hole 34A into which the engagement claw 76 can be fitted is formed on the upper surface of the U-shaped portion of the lock plate 28 to which the lock pin 62 corresponds. Are formed.

Next, the operation of this embodiment configured as described above will be described. When the tongue plate 12 is inserted into the buckle device 10 in a state where the tongue plate 12 is not engaged with the buckle device 10 shown in FIG. 2, the tip of the tongue plate 12 comes into contact with the ejector 26 so that the ejector 26 is removed. The compression coil spring 32 is pressed against the biasing force of the compression coil spring 32 in the tongue plate insertion direction (direction of arrow A in FIG. 2). As a result, the tongue plate 12 is moved in the tongue plate insertion direction while moving the ejector 26 in the tongue plate insertion direction (direction of arrow A in FIG. 1).

During this movement, the ejector 26 contacts the bent portion 44 of the lock plate 28 and presses the bent portion 44 of the lock plate 28 in the tongue plate insertion direction (direction of arrow A in FIG. 2). The ejector 26 is moved in the tongue plate insertion direction (direction of arrow A in FIG. 2) while swinging the lock plate 28 in the direction of engagement of tongue plate (direction of arrow C in FIG. 2), and the tongue plate 12 is inserted in the tongue plate. The engaging portion 38 of the lock plate 28 is inserted into the engaging hole 36 when moving in the direction.

At this time, the lock pin 62 is made movable in the tongue plate extraction direction (the direction of arrow B in FIG. 2) by swinging the lock plate 28, and is biased by the compression coil spring 52 via the lock pin holder 56. The tongue plate is removed. Therefore, when the engagement portion 38 of the lock plate 28 is inserted into the engagement hole 36 of the tongue plate 12, the lock pin 62 is sandwiched between the lock pin holder 56 and the release knob 54, and the positioning plate portion is held. Corresponding to the upper surface (lock position) of 66, this brings about the tongue plate engagement state shown in FIG. 1.

Therefore, in the tongue plate engagement state shown in FIG. 1, the lock pin 62 prevents the lock plate 28 from swinging in the tongue plate disengagement direction (direction of arrow D in FIG. 2), and the lock plate 28 is locked. The engaging portion 38 does not come out of the engaging hole 36 of the tongue plate 12, and the tongue plate 12 does not accidentally come off from the buckle device 10.

When an inertial force acts in the direction of arrow A in the tongue plate engagement state shown in FIG. 1, the compression coil spring 50 (shown in FIG. 4) that biases the release knob 54 in the tongue plate extraction direction is shown. The biasing force and the biasing force of the compression coil spring 52 that biases the lock pin holder 56 in the tongue plate withdrawing direction are the force of the resin spring 78 that biases the inertial body 70 through the arm member 72 in the tongue plate withdrawing direction. Since it is larger than the biasing force, the inertial body 70 inertially moves in the tongue plate insertion direction against the biasing force of the resin spring 78 before the release knob 54 and the lock pin holder 56 inertially move. Therefore, the resin spring 78 elastically deforms as shown in FIG. 3, and at the locking position of the lock pin 62, the arm member 72 rotates around the lock pin 62 in the clockwise direction in FIG. . As a result, the engaging claw 76 that is integrally provided on the arm member 72 and that is fixed to the lock pin 62 fits into the engaging hole 34 </ b> A of the lock plate 28.

As a result, inertial movement of the lock pin 62 from the locked position to the release position is prevented, and the engagement state of the lock plate 28 with the tongue plate 12 is maintained.

On the other hand, the lock pin 62 is configured to be immovable in the arrow B direction, the arrow C direction, and the arrow D direction, and is also almost immovable in the axial direction of the lock pin 62. There is. Therefore, in the buckle device 10 of this embodiment, the lock plate 28 can be held in the tongue plate engagement state regardless of the inertial force in any direction.

To disengage the tongue plate 12 from the buckle device 10, the occupant releases the tongue plate 12 from the state shown in FIG. 1 against the urging force of the compression coil spring 50, and the tongue plate is inserted in the direction (arrow A in FIG. 1). Should be moved to.

That is, in this case, the release knob 54 holds the lock pin 62 and the lock pin holder 56 between the lock pin 62 and the lock pin holder 56 of the compression coil spring 52 (shown in FIG. 4). It is moved in the tongue plate insertion direction while moving in the tongue plate insertion direction (direction of arrow A in FIG. 1) against the biasing force.

By this movement, the lock pin 62 is positioned closer to the tongue plate insertion direction (direction of arrow A in FIG. 1) than the positioning plate portion 66 of the lock plate 28, and then the block 58 of the release knob 54 is moved to the lock plate 28. When contacted with the upper end of the rising portion 40, the release knob 54 pushes the rising portion 40 of the lock plate 28 toward the tongue plate insertion direction to swing the lock plate 28 in the tongue plate disengagement direction (arrow D direction in FIG. 1). Meanwhile, the tongue plate is further moved in the inserting direction.

By the rocking at this time, the engaging portion 38 of the lock plate 28 is pulled out from the engaging hole 36 of the tongue plate 12. At the same time, the ejector 26 is urged by the compression coil spring 32 to move in the tongue plate withdrawal direction (arrow B direction in FIG. 1), and is pushed by the ejector 26 to move the tongue plate 12 outward from the buckle device 10. It is kicked out and returns to the state of FIG.

As described above, in the present embodiment, the inertial body 70 inertially moves before the inertial movement of the lock pin 62 from the locked position to the release position occurs, and the inertial movement of the inertial body 70 locks the inertial body 70. The engaging claw 76 provided integrally with the pin 62 fits into the engaging hole 34A of the lock plate 28, thereby preventing inertial movement of the lock pin 62. It is not necessary to increase the biasing force for holding the etc. in the locked position. Therefore, a large force is not required to release the engagement between the lock pin 62 and the tongue plate 12.

In the above embodiment, the case where the resin spring is used as the elastic urging means has been illustrated, but the present invention is not limited to this, and the first urging means for urging the release knob and the lock pin holder respectively. Of course, other elastic biasing means such as a metal leaf spring may be used as long as the biasing force is smaller than that of the second biasing means.

Further, in the tongue plate engaging state, even if the free end of the arm member does not necessarily come into contact with the inertial body, the arm member can rotate during inertial movement of the inertial body. Good.

[0042]

[Effect of device]

 As described above, according to the present invention, when the inertial force is applied from the lock position of the lock pin to the release position with the lock plate in the tongue plate engaging position, the release knob, the lock pin holder, and the lock pin are locked. Since the inertial movement of the inertial body causes the engagement member integrally provided on the lock pin to engage the lock plate before the inertial movement of the lock pin, the inertial movement of the lock pin from the locked position to the release position is prevented. , The lock pin keeps the lock plate engaged with the tongue plate. Therefore, without increasing the biasing force of the lock pin or the like, it is possible to effectively prevent the engagement between the lock plate and the tongue plate from being disengaged due to the inertial movement of the lock pin, and at the same time, to prevent the lock plate from engaging with the tongue plate. There is an unprecedented practical effect that a large force is not required to disengage the clutch.

[Brief description of drawings]

FIG. 1 is a schematic cross-sectional view showing a tongue plate engagement state of a buckle device according to an embodiment of the present invention.

FIG. 2 is a schematic cross-sectional view showing a tongue plate engagement state of the buckle device of FIG.

FIG. 3 is an operation explanatory view showing an enlarged main part of the buckle device of FIG.

FIG. 4 is an exploded perspective view of the buckle device of FIG.

[Explanation of symbols]

 10 Buckle Device 12 Tongue Plate 18 Buckle Main Body 28 Lock Plate 50 Compression Coil Spring (First Biasing Means) 52 Compression Coil Spring (Second Biasing Means) 54 Release Knob 56 Lock Pin Holder 62 Lock Pin 70 Inertia 72 Times Moving arm 76 Engaging claw (engaging member) 78 Resin spring (elastic urging means)

Claims (1)

[Scope of utility model registration request] 1. A buckle device for use in a seat belt device, in which a tongue plate is inserted and engaged, wherein the buckle body is swingably supported by the buckle body and is engaged with or disengaged from the tongue plate. A lock plate in a mating state, a lock position that is supported by the buckle body and holds the engagement state of the lock plate with respect to the tongue plate in the insertion / extraction direction of the tongue plate, and a release that releases this engagement state. A lock pin movable between a position and a position; a release knob provided so as to be capable of reciprocating along the insertion / extraction direction of the tongue plate and urged in the extraction direction of the tongue plate by the first urging means; The tongue plate is provided so as to be capable of reciprocating along the inserting / removing direction, and is attached to the release knob side by a second urging means. A lock pin holder, an inertial body slidably installed in the release knob along the insertion / extraction direction of the tongue plate, and one end fixed to the lock pin so that the tongue plate insertion direction of the inertial body is fixed. An arm member that is integrally rotated with the lock pin by the movement of the lock pin; and the first and second urging means that are integrally provided on the lock pin holder and urge the arm member toward the inertial body. An elastic urging means having a small urging force; and an engaging member that is integrally provided to the lock pin and that engages with the lock plate when the lock pin rotates at the lock position of the lock pin. A buckle device characterized in that