JPH018179Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a buckle device used in a seat belt device for protecting occupants in vehicle emergencies.

Generally, in a buckle device, a tongue plate attached to the end of occupant restraint webbing is inserted into a buckle body, and a lock lever in the buckle body engages with an engagement opening in the tongue plate to prevent the tongue plate from being pulled out. is configured so that the webbing is attached. Furthermore, when the occupant releases the webbing, the lock lever is separated from the engagement opening of the tongue plate by pressing a release button attached to the buckle body, allowing the tongue plate to be pulled out.

However, with such a conventional buckle device,
When the passenger presses the release button, the tongue plate is designed to have a large pull-out force that urges the lock lever in the opposite direction to the direction in which the passenger presses the release button, so the release button release force is relatively large. It is becoming.

Taking the above facts into consideration, the present invention is a buckle device that reliably prevents the tongue plate from being pulled out when the passenger is wearing the webbing, but can release the engagement between the lock lever and the tongue plate with a small force when the webbing is released. The purpose is to obtain

In the buckling device according to the present invention, the engaging portion of the lock lever moves in a direction perpendicular to the direction of insertion and removal of the tongue plate to engage and disengage from the tongue plate, and the lock lever engages and disengages from the tongue plate. In the inserted state, the engaging part of the lock lever moves in a direction substantially perpendicular to the direction of insertion and removal of the tongue plate and engages with the engaged part of the tongue plate, and a lock member corresponds to this lock lever to maintain the engaged state of the lock lever. The tongue plate is reliably accommodated in the buckle body, and when a passenger operates the release button, the lock member is able to move the lock lever in the direction away from the tongue plate, and the lock lever is moved in the direction away from the tongue plate by the extraction force of the tongue plate. The moderation mechanism actively separates the lock lever from the tongue plate to reduce the unbuckling force.

Embodiments of the present invention will be described below with reference to the drawings.

1 to 3 show a buckle device according to this embodiment.

In this buckle device, a buckle body 10 is formed from a thin metal plate. The bottom plate 10A of this buckle body 10 has leg plates 1 from both sides.
2 and 14 are bent at right angles and extend parallel to each other.

The leg plates 12 and 14 are formed with protrusions 16 that protrude in a direction toward each other, and the protrusions 16
A space between the tongue plate 18 and the bottom plate 10A is defined as an insertion space for the tongue plate 18. An end portion of an occupant restraining webbing 20 is secured to the tongue plate 18, and the other end of this webbing 20 is secured to a vehicle body such as an automobile (not shown).

In addition, a long hole 22 is formed in the low plate 10A, and the elongated hole 22 is oriented in the direction of insertion and removal of the webbing 20 (in the direction of arrow AB). It's summery.
This eject piece 24 has a compression coil spring 26 between it and the end of the elongated hole 22. Therefore, the eject piece 24 comes into contact with the inserted tongue plate 18 and urges it in the direction of ejecting it from the buckle body 10 (in the direction of arrow A).

A shaft plate 32 protruding in the width direction from the middle portion of the lock lever 30 is inserted into the shaft support groove 28 formed in the leg plates 12 and 14. This allows the lock lever 30 to rotate within the buckle body 10 around the shaft plate 32.

A pair of extensions 34 protrude from one end of the lock lever 30 in the tongue plate extraction direction, and the distal ends of these extensions 34 form engagement parts 36 bent in a direction toward each other.

These engaging portions 36 move approximately at right angles in the thickness direction of the tongue plate 18 that is inserted into and removed from the buckle body 10, and engage the back surface (the surface on the webbing 20 side) of the enlarged head 18A formed at the tip of the tongue plate 18. ) to prevent the tongue plate 18 from being pulled out. In this way, the engaging part 3
6 is engaged with the enlarged head 18A of the tongue plate 18, the buckle device is in the locked state, and the lock lever 30 is in the first position shown in FIG. The tongue plate 18 can be pulled out from the buckle body 10 in the released state when it is separated from the tongue plate enlarged head 18A, and the lock lever 30 is in the second position as shown in FIG.

A pair of extension parts 38 protrude from the opposite side of the lock lever 30 in a direction opposite to the engagement part 36, and the ends of these extension parts 38 have shaft parts 40 in a direction toward each other. and is accommodated in a shaft support hole 44 that is formed integrally with the enlarged end portion 43 of the arm 42 . The arm 42 has a base 42A inserted into an L-shaped groove 46 formed in the buckle body leg plates 12 and 14, and is pivotally supported by the buckle body leg plates. Also, this arm base 42A
A tension coil spring 50 is installed between the lock lever 30 and a spring receiving hole 48 formed approximately in the middle of the lock lever 30.

This tension coil spring 50 includes a lock lever 30,
Together with the arm 42, it constitutes a moderation mechanism, which allows the lock lever 30 to be selectively placed in the first position in FIG. 1 or in the second position in FIG. 2. That is, in the first position shown in FIG. 1, the axis of the tension coil spring 50 is disposed closer to the bottom plate 10A than the shaft portion 40, biasing the engaging portion 36 in a direction to engage the tongue plate enlarged head 18A. ing. Conversely, in the second position shown in FIG.
6 away from the buckle body bottom plate 10A, that is, the engaging portion 36 is urged to disengage from the tongue plate enlarged head 18A.

On the other hand, an L-shaped groove 52 is formed in the buckle body leg plates 12 and 14 along the insertion locus of the tongue plate 18. Lock pins 54 as locking members are inserted into these L-shaped grooves 52, and are movable in the longitudinal direction of these L-shaped grooves 52. This lock pin 54 has a first straight portion 5 formed in the L-shaped groove 52 in parallel with the direction in which the tongue plate is inserted and removed.
2A, the lock lever 30 is prevented from rotating in correspondence with the surface of the engaging portion 36 that engages with the tongue plate enlarged head 18A on the side opposite to the buckle body bottom plate 10A, and the lock lever 30 and the tongue plate 18 The state of engagement is maintained.
Further, this lock pin 54 is connected to a second lock pin 54 formed from the end of the first straight portion 52A closer to the tension coil spring 50.
When accommodated in the straight portion 52B, the lock lever 30 can be rotated in a direction away from the tongue plate enlarged head 18A, as shown in FIG.

Both ends of the lock pin 54 protrude from the buckle body leg plates 12, 14 and are accommodated in the elongated hole 58 of the slide release button 56. This slide release button 56 is mounted on the outside of the buckle body leg plates 12, 14 and is movable in the direction of insertion and removal of the tongue plate. Further, the elongated hole 58 has a longitudinal direction perpendicular to the tongue plate insertion/removal direction, so that when the slide release button 56 is moved in the tongue plate insertion direction, the lock pin 54 is moved to the first straight portion 52A of the L-shaped groove 52. It is designed to be moved from there to the second straight portion 52B.

A compression coil spring 62 is interposed between the slide release button 56 and a spring receiver 60 that is stretched between the buckle body leg plates 12 and 14, and biases the slide release button 56 in the tongue plate extraction direction (arrow A direction). There is.

Further, a protrusion 56A protrudes from the bottom plate 10A of the buckle body of the slide release button 56 and corresponds to the enlarged portion 42B of the arm 42. When the slide release button 56 moves in the tongue plate insertion direction at the first position of the lock lever 30, this protrusion 56A comes into contact with the enlarged part 43 of the arm 42 and moves the lock lever 30 towards the second position. There is.

In this buckle device, a connecting plate 66 is fixed to the bottom plate 10A with rivets 64, and the other end of the connecting plate 66 is fixed to the vehicle body (not shown). This allows the buckle device to stand up from the floor of the vehicle body. The buckle device is covered with a synthetic resin cover except for the slide release button 56 and the tongue plate insertion hole.

Next, the operation of this embodiment will be explained.

When the passenger inserts the tongue plate 18 attached to the end of the webbing into the buckle body 10, the tongue plate 18 moves while pushing the eject piece 24, and the eject piece 24 reaches a predetermined insertion amount. is arm 42
The center of the shaft portion 40 passes through the axis of the tension coil spring 50 and reaches the opposite side, and the tension coil spring 50 causes the lock lever 30 to be pushed up.
The biasing direction is reversed, and the lock lever 30 is biased counterclockwise in FIG.

As a result, the engaging portion 36 of the lock lever 30 engages with the enlarged head 18A of the tongue plate 18. At the same time, slide release button 5
6 is moved in the tongue plate removal direction by the biasing force of the compression coil spring 62, the lock pin 54 extends inside the L-shaped groove 52 from the second straight part 52B to the first straight part 52A, and corresponds to the back surface of the lock lever 30. to prevent rotation of the lock lever 30.

In this way, the buckle device is locked by inserting the tongue plate 18, and the tongue plate 18 is reliably engaged with the lock lever engaging portion 36 to prevent extraction.

In the event of a vehicle emergency, the large tension generated on the webbing 20 by the inertia of the occupant acts on the lock lever 30 via the tongue plate 18, but the lock lever 30
Since rotation is reliably prevented by A, the tongue plate 18 will not accidentally slip out of the buckle device, ensuring the occupant's restraint and ensuring safety.

Even in such a locked state, the engaging portion 36 of the lock lever 30 moves in a direction substantially perpendicular to the direction in which the tongue plate is inserted and removed, so that only a small component of the tongue plate removal force is applied to the locking pin 54. is working.

Therefore, when the occupant releases the webbing, he moves the slide release button 56 to move the lock pin 54 from the first straight section 52A to the second straight section 5.
The operating force required to move it to 2B is extremely small. Also, by moving this slide release button 56,
The protruding portion 56A of the slide release button 56 comes into contact with the enlarged portion 43 of the arm 42 and rotates the arm 42 and the lock lever 30, so that the axis of the tension coil spring 50 passes through the center of the shaft portion 40 again and moves to the opposite side. do. As a result, the biasing force of the tension coil spring 50 acts as a force to move the lock lever 30 clockwise in FIG. 2. This result L
The lock pin 54 reaching the second linear portion 52B of the groove 52 is rapidly pushed up by the lock lever 30, and the engaging portion 36 of the lock lever 30 is reliably separated from the tongue plate enlarged head 18A.

Further, the engaging portion 36 of the lock lever 30 receives the biasing force of the compression coil spring 26 via the eject piece 24 in the tongue plate extraction direction, thereby biasing the lock lever 30 to rotate clockwise in FIG. 2. This also ensures that the lock lever 30 is separated from the tongue plate enlarged head 18A. When the engaging portion 36 of the lock lever 30 separates from the enlarged head 18A of the tongue plate 18, the eject piece 24 pushes out the tongue plate 18 from the buckle body 10 with the biasing force of the compression coil spring 26, so that the occupant can quickly and easily remove the webbing. 20 can be released.

In the above embodiment, the lock lever 30 is connected to the tongue plate 18, the engaging portion 36, and the enlarged head 18A.
Although a structure is shown in which the lock lever 30 engages with a combination of the following, other engagement structures are also applicable, such as the lock lever 30 having an engagement portion that engages with an engagement opening that is an engaged portion formed in the tongue plate. .

As explained above, in the buckle device according to the present invention, the lock lever engages in a direction that moves in a direction substantially perpendicular to the tongue plate insertion/extraction direction and receives a rotational force in the direction of releasing the engagement with the tongue plate due to the extraction force of the tongue plate. A lock member that engages with the lock lever and the lock lever to maintain the engaged state of the lock lever and the tongue plate, and a moderation mechanism that selectively positions the lock lever in the engaged state and the disengaged state of the tongue plate of the engaging part. Therefore, when the tongue plate is engaged, the tongue plate is reliably prevented from being pulled out, and when the passenger releases the webbing, the force for disengaging the tongue plate can be significantly reduced.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view showing an embodiment of the buckling device according to the present invention, FIG. 2 is a cross-sectional view showing the operating state of FIG. 1, and FIG. 3 is an exploded perspective view of the present embodiment. 10... Buckle body, 18... Tongue plate, 20... Webbing, 24... Eject piece, 26... Compression coil spring, 30... Lock lever, 36... Engaging portion, 40... Shaft portion, 42
...Arm, 50...Tension coil spring, 52...
L-shaped groove, 54...Lock pin, 56...Slide release button.

Claims (1)

[Scope of utility model registration request] A buckle body, a lock lever that is pivotally supported on the buckle body, and a lock lever provided on the lock lever that moves in a direction substantially perpendicular to the direction in which the tongue plate is inserted into and removed from the buckle body and engages with the engaged portion of the tongue plate to remove the tongue plate. an engaging part that is movable from a first position where the lock is blocked to a second position where the engaged part is separated and receives a rotational force in the direction of the second position due to the extraction force of the tongue plate; From the locked state in which the engaging member is held in the first position, the lock lever is moved to the second position by the passenger's operation.
1. A buckle device comprising: a lock member movable to a released state allowing movement to a position; and a moderating mechanism selectively disposing the lock lever to a first position or a second position of an engaging part.