JPS6181850A - Seat belt device - Google Patents

Abstract

PURPOSE:To prevent a retractor from useless locking by disabling a G sensor from locking the retractor in the operation of a take-up regulating unit. CONSTITUTION:When deceleration degree of a certain value or more acts on a car body, a G sensor S of a retractor R is operated. Then, a lock claw 22a of a lock arm 22 engages a claw 25a of a ratchet wheel 25 to lock the retractor R. Also, when a seat belt is taken up rapidly by the retractor R, a take-up restricting button 17 abuts against a stopper arm 18 with a strong force. Then, the stopper arm 18 is swung downward against the spring force of a tension spring 20 and an end of said arm 18 abuts against the base end of the lock arm 22 to restrain the lock arm 22 from clockwise swing. Thus, the retractor R is not uselessly locked.

Description

DETAILED DESCRIPTION OF THE INVENTION A0 OBJECTS OF THE INVENTION (1) Industrial Field of Application The present invention relates to a seat belt device installed on a seat disposed in a vehicle, mainly a vehicle interior.

(2) Prior Art A seatbelt device including an emergency locking retractor and a seatbelt pulled out from the retractor is conventionally known, as disclosed in, for example, Japanese Patent Application Laid-open No. 75635/1983.

(3) Problems to be solved by the invention In the conventional seat belt device, when the occupant on the seat wears the seat belt, the seat belt must be pulled against the retracting force of the emergency locking retractor (E L R). When the seat belt is pulled out and worn, the seat belt is pulled into the retractor by the retracting force, but between the retractor and the seat belt, there is a retracting limit button that is usually fixed to the seat belt, and a retractor provided on the retractor. A winding regulating device is provided, which is comprised of a stopper and a winding position of the seatbelt by their abutment.

By the way, when the seatbelt is rapidly retracted by the emergency locking retractor, the retraction limit button on the seatbelt collides with the stopper provided on the retractor with a fairly strong force, and the shock acting on the retractor at that time causes ,
There is a problem in that the G sensor in the retractor is activated, which may cause the retractor to become unnecessarily locked.

Therefore, the present invention has made it possible to solve such problems.
The object is to provide a seat belt device with a simple configuration.

B0 Structure of the Invention (1) Means for Solving the Problems According to the present invention, in order to achieve the above-mentioned object, a seatbelt device comprising an emergency locking retractor and a seatbelt pulled out from the retractor, An entrapment regulating device is provided between the retractor and the seat belt for regulating a retracting position of the seat belt, and the retractor is provided with a G sensor for locking the retractor when the entrainment regulating device is activated. A sensor disabling device is provided to disable the sensor.

(2) Effect According to the configuration, when the entrapment restricting device is activated, the retractor does not become unnecessarily locked due to the activation of the G sensor of the emergency lock type retractor.

(3) Example Hereinafter, the first example of the present invention will be described with reference to FIGS. 1 to 3.d In FIG. 4 are arranged. The interior wall 5 behind the seat 4
An emergency locking retractor R is provided at the bottom of the retractor R. A seatbelt B made of a flexible belt made of woven or knitted fabric is pulled out from the retractor R, and the seatbelt B extends upward along the interior wall 5 through a guide 6 provided on the interior wall 5.
It is pulled out into the interior of the vehicle compartment 2 via the through ring 7, and its free end is inserted and connected to the tip of the reach arm 8.

The reach arm 8 is pivotally supported 11 on a frame 10 provided on the outside of the seat portion 4a of the seat 4, that is, on one side near the opening/closing door 9, so as to be able to swing back and forth.

A drive device 12 such as a motor provided on the frame 10 is connected to the base of the reach arm 8.
By this drive, the reach arm 8 is driven to swing back and forth within a predetermined angular range as shown by arrow a in FIG. The reach arm 8 may be swung forward by a drive device 12, and may be swung backwards by a biasing device such as a return spring.

A through tongue 13 is slidably attached to the middle of the seat belt B, and a locking hole 14 is bored at one end of the through tongue 13.

On the other side of the seat 4 near the center of the passenger compartment 2, there is a support arm 1.
A buckle 16 is fixed to the front end of the support arm 15, and the locking hole 14 of the through tongue 13 is detachably connected to the buckle 16.

Between the seat belt B and the emergency lock type retractor 2, there is provided an entrainment regulating device C for regulating the entrainment position of the seat belt I-B. Next, we will mainly explain the structure of this device C in the second section. This will be explained with reference to FIG. 3, which consists of a winding-limiting button 17 and a stopper arm 18. That is, the retractor R button 17 is sewn on one side of the seatbelt B near the retractor R in the retracted state, while the stopper arm 18 swings up and down on the upper part of the hanging Rh of the retractor R. It is freely pivoted 19.

The stopper arm 18 extends below the roll-in restriction button 17 along the seat belt B and across the belt B, and the upper surface of the stopper arm 18 is located directly below the roll-in restriction button 17. Stopper arm 18
A tension spring 20 is stretched between the base end and the upper surface of the housing Rh, and the tension force of this spring 20 is
is held substantially horizontally, that is, substantially perpendicular to the seat belt B. When the seat belt B is caught in the tractor R, the winding restriction button 17 abuts against the stopper arm 18, and the winding position of the seat belt B is regulated.

The emergency lock type retractor R is provided with a G sensor S as usual. This G sensor S is activated when a vehicle encounters a collision or the like and a large deceleration of more than a certain value acts on the vehicle body 1.
The sensor main body 21 is held by the housing Rh, and the lock arm 22 is pivotally supported by the housing Rh so as to be able to swing up and down. The lock arm 22 has its base end connected to the sensor main body 21, and the distal end of the stopper arm 18 faces directly above the base end. A lock pawl 22a is formed at the tip of the lock arm 22, and this lock pawl 22a can be engaged with and disengaged from a pawl 25a of a ratchet wheel 25 that is integrated with the take-up reel 24 of the seat belt B. As shown in FIG. 2, when the G sensor S is inactive, it is detached from the pawl 25a of the ratchet wheel 25.

Further, the housing Rh of the retractor R is provided with a sensor disabling device I that disables the G sensor S when the entrainment regulating device C is activated. This device I is composed of the stopper arm 18 and the tension spring 20, which constitute a part of the entrainment regulating device C, and the tip of the stopper arm 18 is located on the base end of the lock arm 22. ing.

As shown in FIG. 3, the seatbelt B is caught in the tractor R, and the catch-limiting button 17 collides with the stopper arm 18, pulling the arm 18 around the 19 pivot points against the spring force of the tension spring 20. When it swings downward, its tip touches the base end of the lock arm 22, and when it swings counterclockwise in FIG. The G sensor S is disabled and the retractor R is never locked.

Next, the operation of the first embodiment of the present invention shown in FIGS. 1 to 3 will be explained.

When the occupant currently seated in the seat 4 operates the drive device 12 to fasten the seat belt B, the reach arm 8 swings from the storage position (the chain line position in Figure 1) to the forward use position (the solid line position in Figure 1). be moved. Accordingly, the seatbelt B is pulled out into the vehicle interior 2 against the retracting force of the emergency locking retractor R, and the seatbelt B is guided to the occupant's hand. The occupant slides the through tongue 13 inserted through the seat belt B, pulls out the seat belt B, and locks the locking hole 14 with the buckle 16. As described above, the seat belt B is worn by the occupant on the seat 4.

If the vehicle encounters a collision or the like and a deceleration of more than a certain value acts on the vehicle body 1, the G sensor of the retractor R is activated, and its lock arm 22 is swung clockwise in FIG. 22a engages with the pawl 25a of the ratchet wheel 25 as shown by the chain line in FIG. 2, the retractor R is locked, the seatbelt H is prevented from being pulled out, and the seatbelt device is activated to restrain the occupant.

Furthermore, when the occupant removes the through tongue 13 from the buckle 16 in order to stop wearing the seatbelt B, the reach arm 8 is moved by the return operation of the drive device 12 or by the spring force of a return spring (not shown) provided on the reach arm 8. It is rotated to the storage position behind the seat 4 (the position indicated by the chain line in Figure 1). Further, the seat belt B is retracted by the retractor R, and the retracting limit button 17 on the retractor B abuts against the stopper arm 18, so that the retracting position of the seat belt B is regulated.

In this case, when the seat belt B is rapidly caught in the retractor R, when the catch restriction button 17 collides with the stopper arm 18 with a strong force, the stopper arm 18 is pulled as shown in FIG. It is swung downward against the spring force of the spring 20, and its tip abuts the base end of the lock arm 22 to prevent the lock arm 22 from swinging clockwise. Therefore, when retracting the seat belt B, the retracting limit button 1
Even if the retractor R strongly collides with the stopper arm 18 and a shock sufficient to actuate the G sensor is applied to the sensor S, the retractor R will not be locked unnecessarily.

4th. FIG. 5 shows a second embodiment of the invention. In this second embodiment, the entrainment of the seat belt B is electrically detected to activate the sensor disabling device (2). A stopper/switch 31 is provided at 30, and this switch 31 connects the electromagnet 3 via a power supply circuit 32.
Connected to 3. Below the electromagnet 33, the sensor body 2
A G sensor S consisting of a lock arm 22 and a lock arm 22 is disposed directly below the actuator 33a of the tm stone 33.
is placed.

When the seat belt B is pulled out, the retraction limit button 17 is separated from the stopper/switch 31 as shown in FIG. 4, the switch 31 is in the OFF state, and the actuator 33a of the electromagnet 33 is The mouth 7 is far from the arm 22.

Therefore, in this state, if a shock is applied to the G sensor S, the G sensor S is activated and the retractor R can be operated to the locked state as in the first embodiment.

Also, as shown in Fig. 5, the seat belt B is connected to the retractor R.
When pulled in, the entrainment restriction button 17 collides with the switch 3I, turning on the switch 31, and the electromagnet 33 is energized. As a result, the actuator 33a descends and comes into contact with the lock arm 22, and the lock arm 22
Suppresses the upward swing of the Therefore, the G sensor S is kept in an inactive state, and the retractor R is prevented from being locked unnecessarily due to the shock caused by the collision between the retracting limit button 17 and the stopper/switch 31 when the seat belt B is retracted. do not have.

In this second embodiment, the entrainment restriction device C is the entrainment restriction button 1.
7 and a stopper/switch 31, and the sensor disabling device I is composed of a stopper/switch 31 and a power supply circuit 32.
and an electromagnet 33.

C1 Effects of the Invention As is clear from the above embodiments, the present invention provides a trapping regulating device between the emergency locking retractor and the seatbelt for regulating the trapping position of the seatbelt,
Furthermore, the retractor is provided with a sensor disabling device that disables the G sensor in order to lock the retractor when the entrainment regulating device is activated. Furthermore, even if a shock sufficient to lock the retractor is applied, the G sensor will not operate, thereby preventing unnecessary locking of the retractor.

[Brief explanation of drawings]

Figures 1 to 3 show an embodiment of the present invention. Figure 1 is a perspective view of the entire device of the present invention, and Figure 2 is a view of the main parts of the device of the present invention when the seat belt is pulled out. The perspective view and Figure 3 show the seatbelt being caught. FIG. 4 is a perspective view of the device of the present invention when FIG. 5 shows a second embodiment of the device of the present invention, FIG. 4 is a perspective view of the device of the present invention when the seat belt is pulled out, and FIG. 5 is a perspective view of the device of the present invention when the seat belt is retracted. FIG. 2 is a perspective view of the invention device. B... Seat belt, C... Entrapment control device, ■...
・Sensor invalidation device, R...Retractor, S...G sensor Fig. 2 Fig. 1

Claims (1)

[Claims] In a seatbelt device including an emergency locking retractor and a seatbelt pulled out from the retractor, an entrainment regulating device is provided between the retractor and the seatbelt for regulating the entrainment position of the seatbelt, The seat belt device is further characterized in that the retractor is provided with a sensor disabling device that disables a G sensor for locking the retractor when the entrainment regulating device is activated.