JPS6366522B2 - - Google Patents

Description

[Detailed Description of the Invention] [Field of Application of the Invention] The present invention is used in a seat belt device for protecting an occupant in a vehicle emergency, and is used to attach a webbing for occupant restraint.
This invention relates to a buckle device for use in unbundling.

[Background Art] In a seat belt device, after an occupant is seated on a seat, a tongue plate attached to an end of the occupant restraining webbing is engaged with a buckle device, thereby bringing the webbing into a fitted state.

Therefore, when the passenger exits the vehicle, he or she must manually operate the release knob attached to the buckle device to disengage the tongue plate. Additionally, in order to eliminate the need to manually release the buckling device, we have considered a structure in which a solenoid is installed inside the buckling device, and the tongue plate is pulled out from the buckling device by activating this solenoid upon receiving a signal that the door is opened. It will be done.

However, a buckle system is a large structure that accommodates a solenoid in the buckle system that is large enough to generate a force sufficient to release a lock plate in engagement with a tongue plate.

[Object of the Invention] Taking the above-mentioned facts into account, the present invention aims to provide a buckle device that can automatically release the engagement of the tongue plate.

[Structure of the Invention] In the buckle device according to the present invention, a lock plate is attached to a buckle base attached to a vehicle body for engagement with an inserted tongue plate, and this lock plate is moved in a direction away from the tongue plate by a motor. It is becoming driven.

[Embodiments of the Invention] As shown in FIGS. 1 to 3, the first embodiment of the present invention
In the embodiment, one end of the anchor plate 14 is fixed to a part of the buckle base 10 by a rivet 12. A circular hole 16 is bored in the other end of the anchor plate 14, and the other end of the anchor plate 14 is fixed to the vehicle body with a mounting bolt (not shown). This allows the anchor plate 14 and buckle base 10 to stand up from the vehicle body.

At the other end of the buckle base 10, a pair of leg plates 18, 20 are bent at right angles from both sides and extend parallel to each other.
Projecting pieces 22 and 24 are formed from the tip of 0 at right angles in a direction that approaches each other.

The buckle base 10 also has a bent portion 26 at the tip of the opposite end to which the anchor plate 14 is attached, and one end of the lock plate 28 is inserted into this bent portion 26. This lock plate 28 is pivotable around the bent portion 26, and the intermediate portion thereof includes the protruding piece 22,
24 and the buckle base 10.

A tongue plate 30 can be inserted into the buckle base 10 in correspondence with the lock plate 28 (in the direction of arrow A in FIG. 1). This tongue plate 30 has an occupant restraining webbing 32 secured to one end, and an engagement opening 34 formed near the other end.

This tongue plate 30 has a buckle base 10
It is adapted to engage the lock plate 28 when inserted therein. That is, the lock plate 28
A plate spring 38 is interposed between the buckle base 10 and the engagement claw 36 into the engagement opening 34 of the lock plate 28 inserted into the buckle base 10.
enters and prevents the tongue plate 30 from being pulled out.

A pair of release arms 40 protrude from the lock plate 28 and correspond to an inclined surface 44 formed at one end of the slide button 42. The slide button 42 is movable along the leg plates 18 and 20 in the insertion direction of the tongue plate 30, and
It is possible to move from the solid line state to the two-dot chain line state. In the state shown by the solid line in FIG. 1, the inclined surface 44 does not apply any rotational force to the release arm 40, but when the inclined surface 44 moves to the right to the state indicated by the two-dot chain line in FIG. The lock plate 28 is rotated clockwise in FIG. 1, and the engagement pawl 36 is pulled out from the engagement opening 34 to release the engagement with the tongue plate 30.

A recess 46 is formed in the slide button 42 facing the buckle base 10.
A slide piece 48 is arranged inward. This slide piece 48 is pivotally supported to an arm 52 by a pin 50, and the other end of the arm 52 is pivotally supported by a pin 54 at a location eccentric from the central axis of the worm wheel 56. This worm foil 56 is connected to pin 5.
8 to a bracket 60, and this bracket 60 is fixed to the buckle base 10.

Therefore, when the worm wheel 56 rotates, the pin 54 rotates around the axis of the worm wheel 56, so the arm 52 moves the slide button 42 to the right in FIGS. 1 and 2 via the pin 50 and the inner peripheral surface of the recess 46. It is designed to generate a force that moves it to.
A compression coil spring 62 is interposed between the slide piece 48 and the inner peripheral surface of the recess 46 so that the slide button 42 returns to the solid line state in FIG. 1 when no moving force is applied by the arm 52. There is.

A worm gear 64 is engaged with the worm wheel 56, and one end of the worm gear 64 is supported by a bracket 60, and the other end is supported by the bracket 60 via the bracket 66.

Worm gear 64 protruding from bracket 66
A spur gear 68 is fixed to the central shaft of the shaft, and meshes with a small spur gear 70. This small spur gear 70 is secured to an output shaft 74 of a motor 72 which is secured to the bracket 60. Therefore, the rotational force of the motor 72 is reduced by the combination of the small spur gear 70 and the spur gear 68 and the worm gear 64 and the wormwheel 56, and then transmitted as the rotational force of the wormwheel 56.

A control circuit 100 for the motor 72 is shown in FIG. In this control circuit 100, a limit switch 102 is connected to the motor 72 via a vehicle power source 104. This limit switch 102
corresponds to a cam 106 coaxially fixed to the worm wheel 56 as shown in FIG. 3, and is turned off when the worm wheel 56 is in the state shown in FIGS.

Further, one end of a buckle switch 108 is connected to the motor 72 in this control circuit 100, and the other end of this buckle switch 108 is connected to a door switch 110.
It is connected to the vehicle power supply 104 via. Therefore, the back switch 108 and the door switch 110
is connected in parallel with the limit switch 102.

Buckle switch 108 is tongue plate 30
The door switch 110 is turned on when the buckle is inserted into the buckle device, and the door switch 110 is turned on when the vehicle door is opened.

Note that a cover 76 is attached to the buckle base 10 to cover the mechanism section.

The operation of this embodiment configured in this way will be explained.

After boarding the vehicle, the passenger closes the door and removes the tongue plate 30.
When inserted into the buckle base 10, the leaf spring 3
Since the engaging claw 36 engages with the engaging opening 34 with the urging force of 8, the tongue plate 30 is attached to the buckle base 1.
0, and the occupant can wear the webbing 32. In the event of a vehicle emergency, the occupant is restrained by this webbing 32. At this point, the door switch 110 and limit switch 102 are off, so even if the buckle switch 108 is on, the motor 72 remains stopped.

Furthermore, when the passenger exits the vehicle, when the door is opened, the door switch 110 is turned on and the motor 72 is turned on.
drive. The rotation of this motor 72 is decelerated and transmitted to the worm wheel 56. Therefore, the arm 52 moves the slide piece 48 to the right in FIGS. Since this slide piece 48 moves the slide button 42 along the leg plates 18 and 20 via the inner peripheral surface of the recess 46, the inclined surface 44
is connected to the lock plate 2 via the release arm 40.
8 clockwise in FIG. 1, and the engaging claw 36 is pulled out from the engaging opening 34. As a result, the tongue plate 30 can be pulled out from the buckle base 10. Even if the tongue plate 30 is pulled out, the limit switch 102 continues to energize the motor 72, and when the worm wheel 56 rotates once, the cam 106 switches the limit switch 102. is turned off, power to the motor 72 is cut off, and the slide button 42 returns to the state shown in FIGS. 1 and 2. That is, when the door is opened, the cam 106 rotates once and stops, and during this period, the webbing-wearing state of the occupant is automatically released. With this configuration, the occupant can release the webbing simply by opening the door, which is particularly convenient when a physically handicapped person rides the vehicle.

In such an automatic release state, the compression coil spring 62 interposed between the slide piece 48 and the slide button 42 does not exert any force that impedes the driving force of the motor 72, so the driving force of the motor 72 is ensured. is transmitted to the slide button 42 as a moving force.

Further, when the occupant manually releases the webbing, the slide button 42 may be moved against the biasing force of the compression coil spring 62. That is, since the slide piece 48 is stopped, the slide button 42 moves to the right in FIG. 1 while compressing the compression coil spring 62, and the inclined surface 44 rotates the lock plate 28 clockwise via the release arm 40. I will let you do it.

Next, FIGS. 5 and 6 show a second embodiment of the present invention.

In this embodiment, unlike the previous embodiment, the motor 7
2 is attached to the slide button 42. A worm gear 64 is connected to the output shaft of the motor 72, and a worm wheel 56 that meshes with the worm gear 64 is pivotally supported to the slide button 42 by a pin 58. An arm 52 whose one end is pivotally supported by a pin 54 to this worm wheel 56
The other end protrudes from the slide button 42 and has a pin 50 erected thereon. This pin 50 is the cover 7
It is designed to engage with a force receiving plate 78 fixed to 6. A compression coil spring 62 is interposed between the force receiving plate 78 and the slide button 42.

Therefore, in this embodiment, when the motor 72 rotates, its driving force is transmitted to the arm 52 via the worm gear 64 and the worm wheel 56, and the pin 50 attached to the tip of the arm 52 is connected to the force receiving plate 78.
, and moves the slide button 42 toward the force-receiving plate 78, that is, toward the right in FIG. It is designed to rotate to

The limit switch 102 of this embodiment is attached to the cover 76 to detect movement of the slide button 42.
is disposed so that it is turned off when it is in the state shown in FIG. 5, and turned on when it is pushed into the cover 76 and the engagement of the tongue plate 30 is released.

In addition, when operating manually, slide button 4
2 may be moved against the biasing force of the compression coil spring 62.

The motor 72 attached to the slide button 42 is powered by a combination of contacts 80 and 82. That is, the contact 80 is fixed to the slide button 42 with a pin 84, and its tip is fixed to the inside of the cover 76 and contacts the contact 82 which is connected to the control circuit. This contact 82 has a longitudinal direction in the direction of movement of the slide button 42, so that the contacts 80, 82 slide when the slide button 42 moves.

Furthermore, the recess 46 of the release arm 40 of this embodiment is closed with a cover 86.

In the above embodiment, the door switch 110 is provided in the control circuit 100 to control the motor 72, but instead of this, a door switch 110 is provided in the control circuit 100 to control the motor 72, but instead of this, the door switch 110 is turned on under the control of a timer or the like after a predetermined period of time after the large acceleration of the vehicle is applied in an emergency state. A switch may also be used.

[Effects of the Invention] As explained above, in the buckle device according to the present invention, since the lock plate is separated from the tongue plate by the driving force of the motor, a structure is obtained that automatically releases the engagement of the tongue plate despite its small size. be able to.

[Brief explanation of drawings]

Fig. 1 is a sectional view showing a first embodiment of the buckle device according to the present invention, Fig. 2 is a sectional view taken along the line of Fig. 1, Fig. 3 is an exploded perspective view of the first embodiment, and Fig. 4 is a motor FIG. 5 is a sectional view corresponding to FIG. 1 showing the second embodiment of the present invention, and FIG. 6 is a control circuit diagram of the second embodiment of the present invention.
It is an exploded perspective view showing a part of an example. 10... Buckle base, 28... Lock plate, 30... Tongue plate, 32... Webbing, 34... Engagement opening, 36... Engagement claw, 42
...Slide button, 48...Slide piece,
52... Arm, 56... Worm foil, 62
... Compression coil spring, 64 ... Worm gear, 6
8... Spur gear, 70... Small spur gear, 72... Motor, 100... Control circuit, 102... Limit switch, 108... Buckle switch, 110...
...Door switch.

Claims (1)

[Claims] 1 A buckle device used in a seat belt device for occupant protection, which includes a buckle base attached to the vehicle body, a lock plate attached to the buckle base and engaged with a tongue plate inserted, and a lock plate that separates the lock plate from the tongue plate. A buckling device characterized by having a motor that drives in a direction.