JP3260966B2 - Buckle release device for inner pretensioner - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a release device for releasing a buckle after retracting a buckle, which is used in an inner pretensioner which retracts a buckle of a seat belt device and pulls a webbing when the vehicle is suddenly decelerated.

[0002]

2. Description of the Related Art FIG. 7 shows the structure of a conventional inner pretensioner 1. As shown in FIG. That is, the webbing 5 of the seat belt device 3 is locked to the buckle 7 via the tongue plate 6, and the buckle 7 is retracted at the time of a vehicle collision to reduce the slack of the webbing 5. The retraction is performed via the wire 9. That is, the piston 1 provided on the wire 9
The gas generated by the explosion of the explosive during the rapid deceleration of the vehicle is sent into the cylinder 13 in which the wire 1 is stored, and the wire 9 is pulled and moved.

[0003] The retracted buckle 7 is locked by the reverse prevention mechanism 15. This reverse return prevention mechanism 15
A gear 19 rotatable in a substantially vertical plane is provided for an inner stay 17 provided below the buckle 7, and a ratchet pawl 21 is engaged with the gear 19. That is, when the buckle 7 is retracted, the gear 1
9 moves downward while meshing with the rack gear 23. If an upward force is applied to the buckle 7 during this movement, the gear 19 tries to rotate in the reverse direction, that is, in the counterclockwise direction, but this rotation is stopped by the ratchet pawl 21 urged by the elastic body. It is prevented by doing. As a result, the buckle 7 maintains the retracted state.

[0004]

However, according to the above prior art, when the buckle 7 is retracted, the release button 25 provided on the buckle 7 is also retracted together with the buckle 7. For this reason, the release button 25 is at a lower position than the normal state, and it is necessary to arrange the vehicle in such a manner that there is no obstacle around the buckle in order to facilitate the operation of the release button 25.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and a buckle for an inner pretensioner which can easily operate a release button provided on the buckle even after the buckle is retracted by the inner pretensioner. The aim is to obtain a release device.

[0006]

In order to achieve the above object, an invention according to claim 1 is used for an inner pretensioner that pulls in a buckle of a seat belt device and pulls a webbing when the vehicle is suddenly decelerated, and after the buckle is retracted. A release device for releasing a buckle, one end of which is locked to a webbing engagement release portion of the buckle, and the other end projects from the buckle webbing engagement release button after the buckle is retracted to form a buckle release operation portion. And a release member for transmitting a release force to the webbing engagement release section.

A second aspect of the present invention is a release device for releasing a buckle after retracting the buckle, which is used for an inner pretensioner that retracts the buckle of the seat belt device and pulls the webbing when the vehicle is suddenly decelerated. A flexible release member is provided, one end of which is locked to the webbing engagement release portion, the intermediate portion is bent, and the other end is a buckle release operation portion, and the release member is configured to release the buckle by retracting the buckle. The operation portion protrudes from the webbing engagement release button of the buckle, and the webbing engagement release portion of the buckle is operated by an operation force applied to the buckle release operation portion to release the webbing engagement.

According to a third aspect of the present invention, there is provided an unlocking device for releasing the buckle after the buckle is retracted, which is used for an inner pretensioner which retracts the buckle of the seat belt device and pulls the webbing during rapid deceleration of the vehicle. A flexible release member, one end of which is locked to the webbing engagement release portion, the intermediate portion is bent, and the other end is a buckle release operation portion, and the intermediate portion of the release member is moved in the longitudinal direction in a bent state. And a guide member for allowing the release operation portion to protrude upward from the vehicle with a pressing force applied to the one end from the webbing engagement release portion. It is characterized in that the engagement release section is operated to release the engagement of the buckle.

According to a fourth aspect of the present invention, there is provided a release device for releasing a buckle after retracting the buckle, which is used in an inner pretensioner for retracting the buckle of the seat belt device and pulling the webbing when the vehicle suddenly decelerates. A flexible release member, one end of which is locked to the webbing engagement release portion, the intermediate portion is bent, and the other end is a buckle release operation portion, and the intermediate portion of the release member is moved in the longitudinal direction in a bent state. A guide member that is housed so as to be able to project the release operation portion upwardly of the vehicle with a pressing force applied to the one end from the webbing engagement release portion, and a guide member that is provided between the webbing engagement release portion and the release member; Without transmitting the operating force of the webbing engagement release button to the webbing engagement release section,
A play portion for transmitting an operation force from the buckle release operation portion to the webbing engagement release portion, and the webbing engagement release portion is operated by the operation force applied to the buckle release operation portion to release the buckle engagement. It is characterized by doing.

[0010]

According to the first aspect of the present invention, when the buckle is retracted during rapid deceleration of the vehicle, the release member receives this buckle retracting force from the webbing engagement release section, and the other end of the buckle release operation section is operated by the webbing release button. It protrudes in a direction easier for the occupant to operate. Therefore, the one end of the release member activates the webbing engagement release section by the operation force of the occupant on the buckle release operation section, whereby the engagement of the webbing is released.

Here, the webbing disengagement portion is engaged with the tongue plate when the tongue plate provided in the buckle and to which the seat belt webbing is locked is inserted into the buckle, and the webbing disengagement button is provided. Is operated to release the engagement of the tongue plate. The same applies to claims other than claim 1.

According to the second aspect of the present invention, when the buckle is retracted during rapid deceleration of the vehicle, the flexible releasing member receives the buckle retracting force from the webbing engagement releasing portion and receives the other end via the bent intermediate portion. Of the buckle release operation portion projects beyond the webbing engagement release button. Therefore, the one end of the release member activates the webbing engagement release section by the operation force of the occupant on the buckle release operation section, whereby the engagement of the webbing is released.

According to the third aspect of the present invention, when the buckle is retracted during rapid deceleration of the vehicle, the flexible releasing member receives the buckle retracting force from the webbing engagement releasing portion, and the intermediate portion bent inside the guide member. The buckle release operation section at the other end projects beyond the webbing engagement release button via the. Therefore, the one end of the release member operates the webbing engagement release section by the operation force of the occupant to the buckle release operation section,
Thereby, the engagement of the webbing is released.

According to the fourth aspect of the present invention, when the buckle is retracted during rapid deceleration of the vehicle, the flexible releasing member receives this buckle retracting force from the webbing engagement releasing portion and bends inside the guide member to bend in the longitudinal direction. The buckle release operation portion at the other end projects beyond the webbing engagement release button via the intermediate portion that can be moved to. Therefore, the one end of the release member activates the webbing engagement release section by the operation force of the occupant on the buckle release operation section, whereby the engagement of the webbing is released. Since the release member is connected to the webbing engagement release portion via the play portion, the buckle release operation portion does not move even if the webbing engagement release button is operated in a normal state of the vehicle, and the buckle release operation is performed. When the section is operated by the occupant, the webbing engagement release section is operated to release the engagement of the tongue plate.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to FIGS.

As shown in FIGS. 1 and 2, the occupant-mounted webbing 33 of the seatbelt device 31 is passed through a tongue plate 35 between a shoulder-mounted portion and a waist-mounted portion. To be engaged. The disengagement is performed by pressing a release button 39 provided on the buckle 37. In the figure, FR indicates the front of the vehicle.

The buckle 37 has an upper cover 41 and a lower cover 43 as housings as shown in FIGS. On the occupant seat 45 side of the buckle 35 (see FIG. 2), an insertion opening 47 into which the tongue plate 35 is inserted is formed. Tongue plate 3 inserted
A slit 49 is formed at the tip of 5, and the tip of a lock lever 51, which is a main part of the webbing engagement releasing portion, engages to lock the inserted state of the tongue plate 35.

The lock lever 51 pivots around one end 51A, and a lock pin 53 presses a substantially arc-shaped back portion to maintain a locked state. When the lock pin 53 corresponds to the lower bent concave portion as shown by the imaginary line in FIG. 3, the lock lever 51 is not pressed by the lock pin 53 and pivots counterclockwise in FIG. And release the engagement of the tongue plate. The lock pin 53 is held by a pin holder 55 and is configured to be pushed downward from above through a webbing engagement release button 39 for occupant operation. The release button 39 is provided with a spring (not shown) and is urged to return upward.

An arm 57 extending downward is formed on the release button 39, and a triangular claw 59 is formed at the tip of the arm 57. The release member 6 is
1 is locked. Release member 61 in this embodiment
Is a thin plate made of plastic, is flexible and has sufficiently long dimensions. The locking with the claw 59 is performed by a square locking hole 6 formed at one end of the release member 61.
3 is carried out by inserting the claws 61. This locking hole 6
The vertical dimension of 3 is slightly larger than the amount by which the release button 39 is pressed in the release operation of the seat belt. As a result, the release member 61 is locked with the release button 39 via a predetermined play.

Below the locking hole 63 of the release member 61 is the neck 6
It becomes 5, and the width is narrow. The neck 65 passes through a hole 67 formed in the lower cover 43 of the buckle. The size of the hole 67 is slightly larger than the width of the neck 65 of the release member 61. The length of the neck 65 is slightly greater than the amount required to actuate the release button 39.

The release member 61 extends downward from the buckle 37 and is guided by a guide member 69 (FIG. 2). The guide member 69 guides the release member 61 by sandwiching the release member 61 in a substantially sandwich shape, and has a substantially U-shape. The guide member 69 is made of a material having a small friction with the releasing member 61. In FIG. 2, the guide member 69 may be extended so as to be able to accommodate substantially the entire length of the release member 69.

As shown schematically in FIG. 4, the end of the release member 61 is a buckle release operation section 61A with a grip so that the occupant can easily pull by hand. A structure for improving friction such as unevenness that can be easily gripped can be applied to the operation unit 61A. In addition, in order to draw the attention of the occupant, a special color can be colored or characters or marks can be added.

An inner stay 71 is provided below the buckle 37.
The inner stay 71 is attached to a slider 73 via a bolt 72. The slider 73 is slidable downward along a slide guide 75. However, usually, the slider 73 is
Is fixed by the shear pin 76 so that it cannot slide and rattling is prevented. The slider 73 is provided with a ratchet mechanism pawl (not shown), and the slide guide 75 is provided with a tooth row 77 for engaging the pawl. Due to the ratchet mechanism, even when the buckle 37 is being retracted or after the buckle 37 is retracted, when an upward force is applied to the buckle 37, the ratchet mechanism operates and the claw is locked to the tooth row 77, and the buckle 77 is retracted. So that it can be maintained in a flat position.

Further, one end of a wire 79 is fixed to the slider 73. This wire 79 extends downward,
The direction is changed in the lateral direction by a pulley 81, and the buckle 37 is attached to a gas generator 83 (not shown) to pull the buckle 37 downward.

That is, the gas generator 83 has an acceleration sensor (not shown) for detecting a sudden deceleration state of the vehicle. Upon receiving a signal from the acceleration sensor, an ignition device (not shown) discharges the explosive in the gas generator 85. Explode. The gas generated by the explosion of the explosive is sent to the cylinder 87. The other end of the wire 79 is attached to a piston 89 in the cylinder 87.

The inner pretensioner 91 having the above structure is located, for example, between the seat 45 and a console box 93 provided at the center of the vehicle compartment (FIG. 2). Then, in a normal state, the seat belt release button 25 is finally exposed and the button can be operated, but when the buckle 37 is retracted, the buckle 37 is moved to the seat 45 and the console box 9.
Get in between three.

Hereinafter, the operation of this embodiment will be described. In the normal state of the vehicle, as shown in FIG. 2, the buckle 37 is exposed from between the seat 45 and the console box 93, and by pressing the release button 25 provided on the buckle 37, as shown in the imaginary line in FIG. Then, the tip of the lock lever 51 (FIG. 3) is released from the tongue plate 35 to be in the released state, the tongue plate 35 can be pulled out, and the seat belt can be released. When the release button 39 is pushed in, the claw 59 also moves downward, but this claw 59 moves in the locking hole 63 of the release member 61 and the release member 61 does not move, so the operation of operating the release button 39 is performed. The weight is small.

When the vehicle suddenly decelerates, the acceleration sensor of the gas generator 83 detects a large acceleration and sends a detection signal to the ignition signal. The ignition signal explodes the explosive, and the gas generated by the explosion is sent to the cylinder 87. The gas sent is the piston 8 in the cylinder 87
9 is retracted and the wire 79 is retracted. The wire 79 pulls the slider 73 downward, and after the shear pin 76 is broken, the slider 73 actually slides downward. The buckle 37 is pulled downward by this sliding operation. ,
The ratchet mechanism holds the buckle 37 in the retracted position. At this time, the buckle 37 is drawn into a narrow space between the seat 45 and the console box 93.

However, when the buckle 37 is retracted, the hole 67 (FIG. 4) of the buckle 37 pushes the shoulder 66 following the neck 65 of the release member 61 to move the release member 61 downward. This movement is guided by the guide member 69, and the other end of the release member 61 projects upward (FIG. 5).

Then, the occupant grasps the operating portion 61A, which is the other end of the releasing member 61, and pulls it upward. As a result, the release member 61 moves with respect to the buckle 37 by an amount corresponding to the vertical dimension of the neck portion 65, so that the hook 5
9 is pulled (FIG. 6), whereby the release button 39 is also pulled and brought into the same state as when it is pushed in, and the engagement of the tongue plate 35 is released.

As described above, according to this embodiment, after the buckle is retracted, the occupant grasps the end of the upwardly protruding release member 61 by hand and pulls it.
9 can be easily operated to release the seat belt.

In the above embodiment, the release member 61 is used.
Is a plastic plate, but in other embodiments, it can be U-turned upward from below by having a predetermined flexibility, and furthermore, it can protrude upward and be pulled Such a member may be used as long as it has the strength to transmit the force to the release button 39. For example, wires or tapes other than plastics may be used.

In the above embodiment, the guide member 6
9 is for holding the plate-shaped release member 61 in a sandwich shape, but may be a tube-shaped guide member for guiding an emergency release member made of a metal wire in another embodiment.

In the above embodiment, the release member 6 is used.
Although 1 is a U-turn made by the shape of the guide member 69, in other embodiments, it is possible to make a U-turn not only by the shape of the guide member 69 but also by a roller or a pulley. By using a roller or a pulley, the friction of the release member 61 against the guide member 69 is reduced, and the pulling force is immediately applied to the release button 3.
9 can be transmitted.

In the above embodiment, the locking of the claw 59 with respect to the release member 61 is performed simply by inserting the claw 59 having a triangular cross section into the locking hole 63. In an example, it is also possible to adopt a shape to make this locking more secure. That is, the tip of the claw 59 has a U-shaped cross section, and the U-shaped cross section can have a shape in which the upper edge of the locking hole 63 is captured deeply. By making this U-shaped deep, even if the claw 59 moves downward with respect to the locking hole 63, the locking can be prevented from coming off.

The lock lever 51 of the buckle 37 shown in the above embodiment is not limited to the illustrated structure, and various modifications can be applied, the tongue plate 35 can be securely engaged, and the release button 39 is operated to operate the tongue plate. What is necessary is just to be able to release the engagement of. Further, the release member 61 is not limited to the configuration connected to the lock lever 51 via the release button 39, but is directly connected to a tongue plate lock component such as the lock lever 51, and pivots the lock lever 51 to engage the tongue plate. May be canceled.

[0037]

According to the present invention, since the release member projects when the buckle is retracted during rapid deceleration of the vehicle, the occupant pulls the protruding emergency release member, thereby enabling the webbing engagement release portion to be released. It can be easily operated to release the seat belt.

[Brief description of the drawings]

FIG. 1 is a side view showing a part of an embodiment of the present invention in cross section.

FIG. 2 is a view as seen from a direction II in FIG. 1;

FIG. 3 is an enlarged sectional view of a part III in FIG. 2;

FIG. 4 is a cross-sectional view as viewed from a direction IV in FIG. 3;

FIG. 5 is an operation diagram of FIG. 2;

FIG. 6 is an operation diagram of FIG. 4;

FIG. 7 is a side view corresponding to FIG. 1 showing a conventional example.

[Explanation of symbols]

 31 seat belt device 37 buckle 39 webbing engagement release button 51 lock lever (webbing engagement release part) 61 release member 61A buckle release operation part 69 guide member 91 inner pretensioner

────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-6-24293 (JP, A) JP-A-5-170050 (JP, A) JP-A-5-69792 (JP, A) 208753 (JP, A) JP-A-62-46739 (JP, A) JP-A-5-62363 (JP, U) JP-A-6-32231 (JP, U) JP-A-62-139867 (JP, U) (58) Field surveyed (Int. Cl. ⁷ , DB name) B60R 22/46 B60R 22/12

Claims (4)

(57) [Claims] A release device for releasing a buckle after retracting a buckle, which is used in an inner pretensioner that retracts a buckle of a seat belt device and pulls a webbing when the vehicle suddenly decelerates, comprising: One end is locked, and after the buckle is retracted, the other end is projected from the webbing engagement release button of the buckle to form a buckle release operation portion, and has a release member for transmitting a release force to the webbing engagement release portion. Buckle release device for inner pretensioner. 2. A release device for releasing a buckle after retracting a buckle, which is used in an inner pretensioner for retracting a buckle of a seat belt device and pulling a webbing at the time of rapid deceleration of the vehicle. A flexible release member is provided, one end of which is locked, the intermediate portion is bent, and the other end is a buckle release operation unit. A buckle release device for an inner pretensioner, wherein the buckle release device protrudes from the webbing engagement release button and operates the buckle webbing engagement release portion with an operating force applied to the buckle release operation portion to release the webbing engagement. 3. A release device for releasing a buckle after retracting a buckle, which is used in an inner pretensioner for retracting a buckle of a seat belt device and pulling a webbing at the time of rapid deceleration of the vehicle. One end is locked, the middle part is bent, and the other end is a flexible release member having a buckle release operation part. The middle part of the release member is accommodated in the bent state so as to be movable in the longitudinal direction, A guide member for projecting the release operation portion upwardly of the vehicle with a pressing force applied from the webbing engagement release portion to the one end, and operating the webbing engagement release portion with an operation force applied to the buckle release operation portion. A buckle release device for an inner pretensioner, wherein the buckle is disengaged from the buckle. 4. A release device for releasing a buckle after retracting a buckle, which is used in an inner pretensioner for retracting a buckle of a seat belt device and pulling a webbing when the vehicle is suddenly decelerated. One end is locked, the middle part is bent, and the other end is a flexible release member having a buckle release operation part. The middle part of the release member is accommodated in the bent state so as to be movable in the longitudinal direction, A guide member for projecting the release operation portion upwardly of the vehicle by a pressing force applied to the one end from the webbing engagement release portion; and a webbing engagement release button for the buckle provided between the webbing engagement release portion and the release member. A play portion for transmitting the operation force from the buckle release operation portion to the webbing engagement release portion without transmitting the operation force to the webbing engagement release portion, A buckle release device for an inner pretensioner, wherein a buckle is released by operating a webbing engagement release portion with an operation force applied to the buckle release operation portion.