JP2005145374A - Vehicular occupant restraint system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a vehicular occupant restraint system reliably supporting the load on an occupant on a vehicle body side in an emergency. <P>SOLUTION: A tongue 4 passed through the middle of a webbing 3 is attachably/detachably mounted on a buckle 5 on one side of a seat cushion Sc, and one end part 3a of the webbing 3 continuous from the tongue 4 is coupled to an anchor on the other side of the seat cushion Sc. The other end part 3b of the webbing 3 is passed through in a vicinity of a shoulder part of an occupant M, inserted in a shoulder anchor 6, and wound around a retractor in a freely delivering manner, and the shoulder anchor 6 is connected to an upper portion of a pillar. A hook 10 is inserted between a hook 6 of the webbing 3 and the shoulder anchor 6, and an inflatable strap 20 is mounted between the hook 10 and a seat back Sb, and inflated when an emergency is predicted or detected so as to prevent the transverse movement of the occupant M, and the webbing 3 is supported on a vehicle body side. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a vehicle occupant restraint device that restrains a seated occupant in an emergency state such as a rollover or collision of a vehicle body.

A seat belt is generally used as an occupant restraint device for a vehicle, but an airbag bag body is provided on a shoulder belt portion which is a three-point seat belt, and this airbag is used in an emergency such as a side collision of a vehicle or a rollover. A bag body that is inflated and deployed to protect an occupant's head is known (for example, see Patent Document 1).
JP 2000-142303 A (page 5-6, FIG. 2)

  However, in such a conventional occupant restraint device, since the end portion disposed on the shoulder side of the shoulder belt portion is supported by the seat back, the airbag bag body is inflated to protect the occupant in an emergency. The lateral load acting on the occupant is input to the seat back via the shoulder belt portion, and the seat back requires a large strength to support the load, and the weight of the vehicle body is inevitably increased. End up.

  Accordingly, the present invention provides a vehicle occupant restraint device that can reliably support a load acting on an occupant on the vehicle body side in an emergency.

  The present invention is provided with a webbing that restrains the upper body of an occupant seated on a seat obliquely from one shoulder, and supports the lower end of the webbing on the vehicle body side on the side of the seat cushion, and the upper end of the webbing Pass through the vicinity of the shoulder of the seated occupant and support it on the vehicle body side. Insert a hook between the upper support on the upper end of the webbing and the lower support on the lower end of the webbing. The main feature is to attach an inflatable strap disposed near the section, and to inflate the strap when an emergency state such as a rollover or a collision of the vehicle body is predicted or when the emergency state is detected.

  According to the present invention, the lower end and the upper end of the webbing that restrains the upper body of the occupant obliquely are supported on the vehicle body side, and the strap expands when an emergency state is predicted or detected in this state, and the shoulder of the occupant Since the part is pressed and restrained, the upper body can be prevented from moving laterally and the occupant can be protected.

  At this time, since the lower end and upper end of the webbing that passes near the shoulder of the occupant are supported on the vehicle body side, the lateral load acting on the occupant can be reliably supported on the vehicle body side via the strap and webbing. There is an advantage that weight reduction can be achieved without requiring excessive strength.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

  1 to 9 show a first embodiment of a vehicle occupant restraint device according to the present invention, FIG. 1 is an overall perspective view of the occupant restraint device, FIG. 2 is a perspective view of an essential part of the occupant restraint device, and FIG. FIG. 4 is a side view of an essential part of the occupant restraint device in an operating state, FIG. 5 is an exploded perspective view of the hook, FIG. 6 is a perspective view of the hook in an inoperative state, and FIG. 6 is a cross-sectional view taken along line AA in FIG. 6, FIG. 8 is a perspective view of the operating state of the hook, and FIG. 9 is a cross-sectional view taken along line BB in FIG.

  As shown in FIG. 1, the vehicle occupant restraint device 1 according to the first embodiment is configured by adding an airbag function to a seat belt 2, and the seat belt 2 includes three webbings 3. A three-point seat belt that is supported on the vehicle body side is employed.

  In other words, the vehicle occupant restraint device 1 includes a tongue 4 as a lower support portion that is movably inserted in the middle of the webbing 3 and is engaged with a buckle 5 provided on the floor on one side (the vehicle body center side) of the seat cushion Sc. One end 3a of the webbing 3 that is detachably mounted and continues from the insertion portion of the tongue 4 is coupled to an anchor provided on the floor on the other side (front side in the figure) of the seat cushion Sc.

  Further, the other end portion 3b of the webbing 3 is passed through the tongue 4 mounting side of the seated occupant M (see FIGS. 3 and 4), that is, the vicinity of the shoulder portion on the opposite side to the arrangement side of the buckle 5, and the upper support portion After being inserted into the shoulder anchor 6 as described above, it is wound around a retractor provided at the lower part of the pillar so as to be freely fed out, and the shoulder anchor 6 is supported on the vehicle body side by being connected to the upper part of the pillar.

  A hook 10 as an emergency fixing means is movably inserted between the hook 4 of the webbing 3 and the shoulder anchor 6, and the shoulder of the seated occupant M is interposed between the hook 10 and the seat back Sb. An inflatable strap 20 is attached in the vicinity of the section.

  The strap 20 is formed as a cylindrical bag body by a film-like body such as a base cloth having excellent airtightness, and one end portion 20a thereof is installed in the seat back Sb via the tube 21, as shown in FIG. A gas generator 22 is connected.

  The gas generator 22 is fixed to the seat back frame Sb ′, and predicts an emergency state such as a rollover of the vehicle body, a rear collision and a side collision, or by a detection signal from the emergency state detection means 23 for detecting the emergency state. Activates and generates gas instantly.

  As shown in FIG. 3, the strap 20 is contracted when the gas generator 22 is not in operation. On the other hand, as shown in FIG. It is supplied to the strap 20 via the via and inflated.

  The hook 10 includes an emergency fixing means 11 that fixes the hook 10 to the webbing 3 when the emergency state is predicted or detected, and prevents relative movement between the strap 20 and the webbing 3.

  As the emergency fixing means, as shown in FIGS. 5 to 9, a fluid operation mechanism that clamps the webbing 3 using an internal pressure when the strap 20 is expanded is used.

  That is, as shown in FIGS. 5 to 7, the hook 10 is slidable in the cover 12 and a cover 12 fitted and fixed to the rear end portion of the hook body 10 a in which the insertion hole 10 b of the webbing 3 is formed. A slider 13 having a tip portion 13a that closely fits into the insertion hole 10b and a spring 14 that presses and urges the slider 13 away from the hook body 10a is provided.

  The rear end portion 12a of the cover 12 is airtightly fitted and fixed in the strap 20, and the gas pressure in the strap 20 acts on the rear end 13b of the slider 13.

  Therefore, when the hook 10 is in an inoperative state where the gas pressure is not supplied from the gas generator 22 into the strap 20, the slider 13 is hooked by the urging force of the spring 14 as shown in FIGS. 6 and 7. The insertion hole 10b is fully opened, and relative movement with the webbing 3 inserted therethrough is freely performed.

  On the other hand, in the operating state in which the gas pressure is supplied into the strap 22, as shown in FIGS. 8 and 9, the slider 13 protrudes against the urging force of the spring 14 due to the gas pressure, and the tip 13a thereof is inserted into the insertion hole. The webbing 3 that has entered into 10b and has been inserted therethrough is pinched and fixed.

  According to the vehicle occupant restraint device 1 of the first embodiment having the above configuration, the occupant M sits on the seat S and attaches the tongue 4 of the seat belt 2 to the buckle 5, so that the webbing 3 The portion reaching one end 3a coupled to the anchor serves as a lap belt portion to restrain the waist portion, and the portion from the tongue 4 to the shoulder anchor 6 hooked on the pillar serves as a shoulder belt portion to tilt the upper body diagonally. To be restrained.

  In this state, as shown in FIG. 3, the strap 20 is disposed in the vicinity of the shoulder of the occupant M on the shoulder anchor 6 arrangement side, with the hook 10 coupled to the other end freely moving with respect to the webbing 3. .

  And, when driving while wearing the seat belt 2 in this way, if the vehicle body falls into an emergency state such as a rollover, a rear collision and a side collision, the emergency state detection means 23 predicts or detects this, A detection signal is output to the gas generator 22 to operate it.

  Then, the strap 20 is inflated by the gas pressure generated by the gas generator 22 to restrain and restrain the occupant M, thereby preventing the upper body from moving sideways and protecting the occupant M. Can do.

  At this time, the other end 3b of the webbing 3 passing near the shoulder of the occupant M is supported on the pillar, that is, the vehicle body side via the shoulder anchor 6, so that the lateral load acting on the occupant M is applied to the strap 10 and the webbing 3. Since it can be reliably supported on the vehicle body side via the other end 3b, the seat back Sb is not required to have an excessive strength, and the weight reduction of the seat S and the weight reduction of the vehicle body can be achieved.

  In the present embodiment, in addition to the above-described effects, the hook 10 includes an emergency fixing means 11 that is fixed to the webbing 3 when the emergency state is predicted or detected. Therefore, the strap 10 can be prevented from being pushed up by the weight of the vehicle, and the occupant restraint by the strap 10 can be reliably performed.

  Furthermore, as the emergency fixing means 11, a fluid operation mechanism that sandwiches the webbing 3 by effectively using the gas pressure when the strap 10 is expanded is used, so that the emergency fixing function of the hook 10 is erroneously corrected. It can be executed reliably without causing operation.

  The cover 12 may be integrally formed with the strap 20.

  FIGS. 10 and 11 show a second embodiment of the present invention, in which the same components as those in the first embodiment are denoted by the same reference numerals and redundant description is omitted, and FIG. 10 is a perspective view of the hook. FIG. 11 is an exploded perspective view of the hook.

  In the vehicle occupant restraint device according to the second embodiment, the emergency fixing means 11A performs webbing by a detection signal from the emergency state detection means 23 (see FIG. 2) that predicts or detects the emergency state described in the first embodiment. A mechanical operating mechanism is used for clamping.

  That is, as shown in FIG. 11 and FIG. 12, the emergency fixing means 11A is slidably attached to the hook body 10a in which the insertion hole 10b of the webbing 3 is formed, and the hook body 10a. Is fixed to a slider 13 that enters the insertion hole 10b, a spring 14 that presses and urges the slider 13 in a direction away from the hook body 11, and a mounting base 10c that protrudes from the rear end of the hook body 10a. And an actuator 15 for pressing the rear end 13b 'of the slider 13 with a push rod 15a.

  The actuator 15 has a built-in solenoid, and the push rod 15a is protruded by inputting the emergency detection signal to the solenoid, and when the detection signal is not output, the push rod 15a is retracted by an elastic body. Set to state.

  The rear end portion of the mounting base 10c of the hook body 10a is airtightly coupled to the other end portion of the strap 20 as shown in FIG.

  Therefore, according to the second embodiment, in the non-operating state where the gas pressure is not supplied from the gas generating device 22 in the strap 20, the detection signal is not output from the emergency state detecting means 23. 15a is in a retracted state, the insertion hole 10b is fully opened, and relative movement with the webbing 3 inserted therethrough is freely performed.

  On the other hand, in the operating state in which the gas pressure is supplied into the strap 22, the detection signal is output from the emergency state detection means 23, the push rod 15a of the actuator 15 protrudes and the slider 13 is pushed out, and the tip 13a thereof is inserted into the insertion hole 10b. The webbing 3 inserted into the inside is pinched and fixed.

  For this reason, similarly to the first embodiment, it is possible to avoid the strap 20 being pushed upward by the weight of the occupant M when the vehicle rolls over or collides, and the occupant restraint by the strap 20 can be reliably performed.

  By the way, in the emergency fixing means 11A of the second embodiment, since the slider 13 is moved by the actuator 15, the entire configuration can be simplified.

  In the present embodiment, the actuator 15 and the vicinity thereof are preferably covered with a covering member such as a casing.

  12 and 13 show a third embodiment of the present invention, in which the same components as in the first embodiment are denoted by the same reference numerals and redundant description is omitted, and FIG. FIG. 13 is an overall perspective view of the occupant restraint device.

  As in the first and second embodiments, the hook 10 of the vehicle occupant restraint device of the third embodiment is movable relative to the webbing 3, and the hook 10 is close to the tongue 4. A string-like elastic body 16 is provided as a biasing force applying means having a biasing force in the direction.

  That is, in this embodiment, the hook 10 and the tongue 4 are connected by the string-like elastic body 16.

  Therefore, according to the third embodiment, when the seat occupant M wears the seat belt 2 with a simple configuration in which the hook 10B and the tongue 4 are connected by the string-like elastic body 16, the string-like elastic body 16 Because the hook 10B can be pulled downward by the elastic force, the gap between the strap 20 and the shoulder of the occupant becomes smaller.

  For this reason, the function of restraining the occupant's shoulder when the strap 20 expands in an emergency can be further improved.

  In addition, the effect of each embodiment can further be heightened by applying the string-like elastic body 16 of this embodiment also to the said 1st, 2nd embodiment. In the above-described embodiment, the description has focused on the frontal collision, but it is needless to say that the present application can be applied to other emergency situations such as a rearal collision and rollover.

  By the way, although the vehicle occupant restraint device of the present invention has been described by taking the first to third embodiments as an example, the present invention is not limited to these embodiments, and other embodiments are within the scope of the present invention. Various types can be adopted.

1 is an overall perspective view of an occupant restraint device according to a first embodiment of the present invention. It is a principal part perspective view of the passenger | crew restraint apparatus in 1st Embodiment of this invention. It is a principal part side view of the non-operation state of the passenger | crew restraint apparatus in 1st Embodiment of this invention. It is a principal part side view of the operating state of the passenger | crew restraint apparatus in 1st Embodiment of this invention. It is a disassembled perspective view of the hook in 1st Embodiment of this invention. It is a perspective view of the non-operation state of the hook in a 1st embodiment of the present invention. It is sectional drawing along the AA line of FIG. It is a perspective view of the operating state of the hook in a 1st embodiment of the present invention. It is sectional drawing along the BB line of FIG. It is a perspective view of the hook in 2nd Embodiment of this invention. It is a disassembled perspective view of the hook in 2nd Embodiment of this invention. It is a principal part perspective view of the passenger | crew restraint apparatus in 3rd Embodiment of this invention. It is a whole perspective view of a crew member restraint device in a 3rd embodiment of the present invention.

Explanation of symbols

1 Vehicle occupant restraint device 2 Seat belt 3 Webbing 4 Tongue (body support)
5 Buckle 6 Shoulder anchor (body support)
10 Hook 11, 11A Emergency fixing means 16 String elastic body (biasing force applying means)
20 strap 22 gas generator 23 emergency state detection means M occupant S seat Sc seat cushion Sb seat back

Claims (5)

In a vehicle occupant restraint device having a webbing that restrains an upper body of an occupant seated on a seat obliquely from one shoulder,
While supporting the lower end portion of the webbing that restrains the upper body diagonally to the vehicle body side on the side of the seat cushion, the upper end portion of this webbing is supported on the vehicle body side through the vicinity of the shoulder of the seated occupant,
Insert a hook between the upper support part on the upper end side of the webbing and the lower support part on the lower end side,
Attached to this hook is an inflatable strap placed near the shoulder of the seated occupant,
An occupant restraint device for a vehicle, wherein the strap is inflated when an emergency state such as a vehicle rollover or a collision is predicted or when the emergency state is detected.   The vehicle occupant restraint device according to claim 1, wherein the hook includes an emergency fixing unit that fixes the hook to the webbing when the emergency state is predicted or detected.   3. The vehicle occupant restraint device according to claim 2, wherein the emergency fixing means uses a fluid operation mechanism that clamps the webbing by using an internal pressure when the strap is inflated.   3. The vehicle occupant restraint apparatus according to claim 2, wherein the emergency fixing means uses a mechanical operating mechanism that clamps the webbing by a detection signal from the emergency state detection means for predicting or detecting the emergency state.   The vehicle occupant restraint device according to any one of claims 2 to 4, wherein the hook includes urging force applying means having an urging force in a direction close to a lower end side support portion of the webbing.

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