JPS6119963Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a webbing manual locking device which is used in a seat belt device for protecting a vehicle occupant and which manually locks the unwinding of a webbing for restraining the occupant when necessary.

In a seat belt device, a webbing with one end wound around a winding shaft is attached to an occupant, and in the event of a vehicle emergency, a locking means is activated by a rolling member to prevent the webbing from unwinding, thereby placing the occupant in a restrained state by the webbing. It is designed to improve the safety of passengers.

In this way, in the seatbelt device, the restraining webbing stops unwinding from the take-up shaft only in the event of a vehicle emergency, so the occupant can freely unwind the webbing from the take-up shaft during normal vehicle driving. It is now possible to take out the vehicle and change the driving position.

However, there is also a problem due to the fact that the webbing can be freely unwound from the take-up shaft under normal vehicle running conditions. In other words, when the passenger restraint webbing is attached to luggage placed on the seat or to protection devices for infants or child occupants while driving, the relatively small starting acceleration, stopping acceleration, centrifugal force, etc. of the vehicle can cause these luggage, etc. moves due to inertia, and the webbing can be unwound from the take-up shaft, so the movement of these items cannot be prevented.

The present invention has been made in consideration of the above facts, and an object of the present invention is to provide a manual webbing locking device that allows an occupant to manually lock the rotation of unwinding the webbing from the take-up shaft when necessary.

The webbing manual locking device according to the present invention operates the locking means by forcibly rolling the rolling member of the acceleration detecting means by the operation of the occupant.

Furthermore, in the present invention, the operating means is divided into an operating force receiving portion and a rolling member contacting portion, and this rolling member contacting portion is movable relative to the operating force receiving portion under a predetermined external force. Therefore, it is possible to wind up the webbing even when the winding shaft is locked in unwinding rotation.

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

A first embodiment of the present invention is shown in FIGS. 1-4.

As shown in FIG. 1, a pair of vehicle body mounting openings 12 are formed in the base plate 10. As shown in FIG.

The surface of this base plate 10 is exposed to the interior, but the back surface has a pair of leg plates 14, 1.
6 are welded and extend parallel to each other. A winding shaft 18 shown in FIG. 2 is pivotally supported on these leg plates 14 and 16, and winds the end of the occupant restraint webbing 20 introduced through the webbing insertion hole 19 of the base plate 10 in a layered manner. I'm taking it. This winding shaft 18 is biased in the winding direction of the webbing 20 by a mainspring spring 22 disposed in a protrusion from the leg plate 14 .

A pair of ratchet wheels 24 are fixed to the intermediate portion of the winding shaft 18 at positions sandwiching the webbing 20 so as to rotate together with the winding shaft 18. A pawl 26 corresponds to this ratchet foil 24, and both ends of this pawl 26 are connected to the leg plates 14, 16.
It is supported by a shaft.

Here, the ratchet wheel 24 and the pawl 26 constitute a locking means, and when the vehicle is normally running, the pawl 26 is separated from the ratchet wheel 24 due to its own weight, but when the pawl 26 is rotated by the detection means 28. In some cases, it engages with the ratchet wheel 24 to prevent the ratchet wheel 24 and the take-up shaft 18 from rotating to unwind the webbing.

The detection means 28 is provided on the outside of the leg plate 18, and is provided with a pendulum 30, which is a type of rolling member. This pendulum 30 has a neck 32 that passes through a bracket 34 fixed to the leg plate 18, and its axis is vertical.
It is in contact with the top. The axis of this pendulum 30 is vertical when the vehicle is normally running, but when the vehicle acceleration reaches a predetermined value or more, the pendulum 30 rolls and the top 36 pushes up the lever 38, causing the lever 36 to Rotate the pawl 26 to set the ratchet foil 2.
It is designed to mesh with 4.

Instead of the pendulum 30, it is also possible to use a rolling member such as a rotating member in which a ball is placed in a mortar-like dish, or a falling member that falls over at an acceleration of a predetermined value or more.

The operating means 40 is attached to the base plate 10 and is adapted to roll the pendulum 30 when necessary. A push lever 42, which is an operating force receiving portion of the operating means 40, is inserted into a cylindrical guide 44 fixed to the leg plate 16, and is movable along the axis of the guide 44. A push knob 46 is fixed to a protruding portion of the push lever 42 on the indoor side. Further, recesses 48 and 50 for adjustment mechanisms are bored in the intermediate portion of the push lever 42, and correspond to a moderation ball 52 which is movable in an angular direction with respect to the axis of the guide 44. This moderation ball 52 is pressed against the outer peripheral surface of the push lever 42 by the bias of a compression coil spring 54 interposed between it and the guide 44, and the push lever 42 is pressed against the push knob 46 from the state shown in FIGS. 3 and 4. Accordingly, when the moderation ball 52 is moved rightward in the drawing, the moderation ball 52 is accommodated in the recess 50 and the operating means 40 is in a locked state.

Further, a recess 56 is provided on the outer periphery of the push lever 42 on the opposite side of the recess 50, and when the push lever 42 reaches the locked state, the detection protrusion 60 of the alarm switch 58 is housed in the recess 56, and an alarm is generated. The switch 58 is arranged to be turned on.

A sliding hole 62 is bored at the end of the push lever 42 opposite to the push knob 46, into which one end of a push rod 64 for contacting a rolling member is inserted. This push rod 64 is movable relative to the push lever 42 in the axial direction, and is moved to a stopper 68 fixed to the tip of the push lever 42 by the biasing force of a compression coil spring 66 disposed inside the slide hole 62. As a result, the push rod 64 is projected from the push lever 42 by the maximum amount, and can be pushed into the slide hole 62 against the biasing force of the compression coil spring 66.

The tip of this push rod 64 is connected to the detection means 2.
8, and is arranged close to the outer periphery of the pendulum 30.

In this embodiment configured as described above, the base plate 10 is fixed to the vehicle body through the vehicle body mounting opening 12, so that the surface of the base plate 10 protrudes from the vehicle body 70 and is exposed to the interior of the vehicle, as shown in FIG. The webbing 20 passes through the webbing insertion hole 19 provided in the base plate 10.
The tip of the is guided into the car.

The occupant can put on the webbing 20 by wearing the other end (not shown) of the webbing 20.

When the vehicle is in an emergency situation at the time of a collision, the pendulum 30 detects the large acceleration generated in the vehicle and rolls to engage the pawl 26 with the ratchet wheel 24, causing the webbing unwinding rotation of the winding shaft 18 to be rapid. When the vehicle is stopped, the occupant is restrained by the webbing 20, ensuring safety.

On the other hand, in the normal running state of the vehicle, since the pendulum 30 has its axis vertical, the pawl 26 is separated from the ratchet wheel 24, and the occupant can arbitrarily unwind the webbing 20 from the take-up shaft 18 to change the driving posture. Can be done.

It is also possible to attach the webbing 20 to the seat by wrapping it around luggage placed on the seat, a restraint device for a child occupant, etc. In this case, the pendulum 30 does not operate the pawl 26 under relatively weak accelerations such as when the vehicle is normally generated or stopped, so the ratchet wheel 24 and the take-up shaft 18 can still unwind and rotate the webbing. Therefore, there is a possibility that luggage or the like may fall from the seat.

In this case, the passenger pushes the push knob 46 onto the vehicle body 70.
When pushed in, the push lever 46 transmits this pushing force to the push rod 64, which causes the pendulum 30 to roll and forcibly engage the pawl 26 with the foil 24, causing the webbing unwinding rotation of the take-up shaft 18 to stop. is stopped and a locked condition is formed. Therefore, the luggage and the like wrapped around the webbing 20 will not fall off the seat.

When the lock is activated in this way, the webbing 2
If the webbing 20 is loose inside the vehicle, it is necessary to wind up the webbing 20 onto the winding shaft 18 in order to eliminate this slack. Since the winding shaft 18 is biased in the winding direction by the biasing force of the mainspring spring 22, the cutting edge surface of the ratchet wheel 24 pushes the pole 26 onto the winding shaft 18.
Move it in the direction of forcibly separating it from the As a result, the pole 26 is moved to the pendulum 3 via the lever 38.
0 in the direction in which the rolling angle decreases, that is, the child 30
It is necessary to move the axis in the direction where the axis becomes vertical. In this embodiment, the push rod 64 is movable relative to the push lever 42 against the biasing force of the compression coil spring 66, so that the pendulum 30 can be moved, and the webbing 20 is loosened by the biasing force of the mainspring spring 22. It is possible to wind up up to the winding shaft 18.

If the webbing unwinding lock state is no longer necessary, pulling the push knob 46 toward the inside of the vehicle will release the lock state of the winding shaft, so it can be used as a normal winding device and can be used in vehicle emergencies. At times, the webbing unwinding rotation of the winding shaft 18 can be stopped by the operation of the detection means 28.

If the occupant inadvertently contacts the push knob 46 and locks the winding shaft, the alarm switch 58 is activated so that the occupant can detect the locked condition by means of a warning light (not shown) or the like.

Next, FIG. 5 shows a reference example of the present invention.

In this reference example, a pull lever 72 is provided in place of the push lever in the previous embodiment. This pull lever 72 is supported by the leg plate 16 via the guide 44 as in the first embodiment.
When the occupant moves in response to the pulling force applied to the knob 46, the circular hole 76 provided at the tip comes into contact with the elastic protrusion 78, which is a rolling member contacting part, protruding from the lower end of the pendulum 30, causing the pendulum to swing. 30 can be rolled. This circular hole 76 is the knob 46
When it approaches the base plate 10 by the maximum amount, that is, when it is not operated, it is concentric with the elastic protrusion 78 so as not to interfere with the operation of the pendulum 30.

Further, in this reference example, when the winding shaft 18 winds up the webbing in the locked state, the elastic protrusion 78 in contact with the circular hole 76 is elastically deformed, so that the pendulum 30 can move its axis in the vertical direction. Therefore, it is possible to wind up the webbing around the winding shaft in the same way as in the embodiment described above.

Next, FIG. 6 shows a second embodiment of the present invention, in which a rotary lever 80 is pivotally supported on the base plate 10. This rotating lever 8
As shown in FIG. 7, one end of a U-shaped leaf spring 82, which is a rolling member contact portion, is fixed to the tip of the spring 0.

Therefore, in this embodiment, when the occupant applies a rotational force to the knob 46, the tip of the U-shaped leaf spring 86 comes into contact with the pendulum 30, causing the pendulum 30 to roll, forming a locked state. Further, when the winding shaft is rotated in the winding direction in the locked state, the pendulum 30 can be moved by deforming the U-shaped leaf spring 86, so that the slack in the webbing can be eliminated as in the previous embodiment.

Next, FIG. 8 shows a third embodiment of the present invention, and this embodiment is also provided with a pull lever 72 similar to the reference example, but the tip of this pull lever 72 is L-shaped. One end of the leaf spring 84 is fixed by a rivet 86, and the other end of this L-shaped leaf spring 84 corresponds to the outer periphery of the pendulum 30.

Therefore, in this embodiment as well, if the pull lever 72 is moved in the direction of pulling it out from the base plate 10, the leaf spring 84 will cause the pendulum 30 to roll and move the winding shaft 18.
The unwinding lock state can be formed, and the elastic deformation of the L-shaped leaf spring 84 allows the pendulum 30 to move, thereby eliminating the slack in the webbing.

As explained above, the webbing manual locking device according to the present invention forcibly rolls the rolling member of the acceleration detection means by the operating force of the occupant on the operating means, so that the rolling member contact portion is relatively movable under a predetermined external force. This has an excellent effect in that the unwinding rotation of the webbing can be stopped only when necessary.

[Brief explanation of the drawing]

FIG. 1 is a front view showing a first embodiment of the webbing means locking device according to the present invention, FIG. 2 is a sectional view taken along the line of FIG. 1, and FIG. 3 is a sectional view taken along the line of FIG.
4 is an enlarged sectional view of the operating means in FIG. 3, FIG. 5 is a reference view, FIG. 6 is a sectional view corresponding to FIG. 3 showing a second embodiment of the present invention, and FIG. FIG. 8 is a cross-sectional view of the third embodiment of the present invention.
It is a sectional view corresponding to the figure. 18... Winding shaft, 20... Webbing, 24...
...Rachet foil, 26... Paul, 28...
Detection means, 30... Pendulum, 40... Operation means, 4
2... Push lever, 64... Push rod, 72... Pull lever, 80... Rotating lever.

Claims (1)

[Scope of utility model registration request] A take-up shaft for winding up the webbing for occupant restraint, a lock means for preventing the webbing from unwinding from the take-up shaft, a rolling member for detecting acceleration and actuating the lock means in the event of a vehicle emergency; an operating means for forcibly rolling the rolling member of the detection means, and the operating means includes an operating force receiving section and a relative movement between the operating force receiving section and the operating force receiving section under a predetermined external force. Webbing manual locking device with possible rolling member contact points.