WO1997047499A1 - Dispositif automatique de reglage en hauteur du renvoi d'une ceinture de securite - Google Patents
Dispositif automatique de reglage en hauteur du renvoi d'une ceinture de securite Download PDFInfo
- Publication number
- WO1997047499A1 WO1997047499A1 PCT/FR1997/001071 FR9701071W WO9747499A1 WO 1997047499 A1 WO1997047499 A1 WO 1997047499A1 FR 9701071 W FR9701071 W FR 9701071W WO 9747499 A1 WO9747499 A1 WO 9747499A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- carriage
- angular position
- belt
- return
- sensor
- Prior art date
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R22/00—Safety belts or body harnesses in vehicles
- B60R22/18—Anchoring devices
- B60R22/20—Anchoring devices adjustable in position, e.g. in height
- B60R22/201—Anchoring devices adjustable in position, e.g. in height with the belt anchor connected to a slider movable in a vehicle-mounted track
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R22/00—Safety belts or body harnesses in vehicles
- B60R22/18—Anchoring devices
- B60R22/20—Anchoring devices adjustable in position, e.g. in height
- B60R2022/208—Anchoring devices adjustable in position, e.g. in height by automatic or remote control means
Definitions
- the invention relates to an automatic device for adjusting the height of the return of a seat belt for a motor vehicle.
- the invention relates more particularly to a seat belt device for a motor vehicle, of the type comprising a belt retractor fixed to on a fixed part of the vehicle body, of the type in which a strand of the belt passes through a return to be directed towards the shoulder of a passenger who is strapped with the belt, and of the type in which the return is rotatably mounted, about a substantially horizontal and transverse axis, on a carriage which is mounted coul emitting in height on a fixed part of the vehicle body, and of the type in which an adjustment device is provided which causes the movement of the carriage as a function of a parameter representative of the orientation of said strand of the belt.
- the belt strap tends to pass very close to the base of the passenger's neck.
- a device for adjusting the height of the seat belt which comprises a detection arm which is pivotally mounted, at one end, on the sliding carriage, around the same substantially horizontal axis as the return of the belt, and the other end of which has a loop through which passes the strand of the belt which extends between the reference and the passenger's shoulder.
- the device is also provided with a sensor which makes it possible to know the angular position of this detection arm around its axis, which makes it possible to deduce therefrom information as to the orientation of the strand of the belt which extends between the return and the passenger's shoulder.
- This information is then used to control the movement of the carriage, up or down, to obtain a predetermined angle of orientation of the arm, corresponding to a relative position of the strand of the belt relative to the shoulder of the passenger who ensures the best compromise between the effectiveness of the belt and the discomfort it is likely to provide.
- this device does not take account of the pivoting of the reference around its axis, and this therefore gives rise to a certain uncertainty as to the exact orientation of the strand of the belt between the return and the passenger's shoulder.
- the object of the invention is therefore to propose a device for adjusting the height of the di sposition of the return which is particularly simple and reliable.
- the invention provides a device of the type described above, characterized in that the device comprises means for detecting the angular position of the gear around its axis of rotation so as to control a height adjustment of the position of the carriage until the detected angular position is within a predetermined interval, within the limit of the maximum stroke of the carriage.
- the height of the latter is adjusted so that the return occupies a predetermined nominal angular position
- the height position of the carriage is only changed if the difference between the angular position of the return and the nominal angular position exceeds a predetermined angle; - The height position of the carriage is only changed if the return is removed from its nominal angular position for a period greater than a predetermined threshold;
- the carriage includes a thread mounted on a drive screw which is rotatably mounted on the body around its substantially vertical axis, and the rotation of the screw is controlled according to the angular position of the return;
- the device comprises a sensor for detecting the angular position of the return which is the ideal ground of the carriage and which is connected to a calculation unit secured to the vehicle body by a twisted cable wound around the carriage drive screw;
- the angular position sensor of the return is a potentiometric sensor whose electrical resistance value varies as a function of the angular position of the return; - the sensor is a "Hall" effect sensor;
- the sensor has a rotary slider with an axis parallel to the axis of rotation of the gear, and the gear has a wheel toothed which meshes with a pinion integral with the cursor of the return;
- the device comprises means for detecting the upper and lower end of the carriage.
- FIG. 1 and 2 are schematic views i illustrating, in two perpendicular directions, a device according to the teachings of the invention
- FIG. 3 is an enlarged view of part of Figure 1, in which the reference is shown when it is located too high relative to the shoulder of the driver;
- - Figure 4 is a view similar to that of Figure 3 in which the reference is shown when it is arranged too low relative to the passenger's shoulder.
- FIGS. 1 and 2 illustrate a seat belt device 10, shown in the stowed position when the passenger has not yet put on the belt 12.
- the belt 12 consists of a textile tape or strap, one end of which is fixed directly to an anchor point fixed relative to the body while the other end is fixed to the drum. a reel which makes it possible to adjust the length used of the ribbon in the belt 12 as a function in particular of the size of the strapped person and the relative position of the seat relative to the upright.
- the retractor is intended to block, for example when, following an impact, the unwinding speed imposed by the passenger on the belt 12 exceeds a predetermined threshold.
- the belt 12 passes inside a slot 14 of a return 16 which is mounted at rotation on an element of the body such as an upright, about an axis A1 substantially horizontal and transverse with respect to the longitudinal direction of the vehicle, so as to delimit two strands.
- a first strand 18, connecting the reel to the reference 16 extends in a plane substantially perpendicular to the axis of rotation A1 of the reference 16, near the upright.
- a second strand 20 extends, in the stored position of the belt, between the reference 16 and the fixed end of the belt 12, substantially parallel to the first strand 1 8, on the other side of the upright relative to the first strand 1 8.
- This second strand 20 carries a fastener, or bolt, (not shown) which is intended to be hung on an anchor point (not shown) arranged on the side opposite the amount relative to the passenger, substantially at the level of the pelvis thereof. ci, to subdivide the second strand 20 into two portions, one of which extends across the pelvis of the strapped person and the other extends diagonally across his torso.
- the reference 16 is mounted not directly on a fixed part of the body, but on a carriage 22 which is slidably mounted on the fixed part of the body, such as the amount, in a vertical direction between a high position and a low position.
- the carriage 22 is guided in a vertical slide 24 and its movements are controlled by a screw-nut device. To this end, the carriage 22 is tapped and is mounted on a drive screw 28.
- the screw 28 is rotatably mounted in the slide 24 around its substantially vertical axis A3.
- the screw 28 is immobilized in translation so that, when it is rotated, it causes the carriage 22 to move along its axis A3.
- the screw 28 is driven in rotation using an electric motor 30, for example arranged at the foot of the vehicle upright.
- the screw 28 can be connected to the motor 30 by means of a flexible rod 31 which thus makes it possible to overcome any alignment constraint between the motor shaft of the electric motor 30 and the drive screw 28.
- the carriage 22 includes means for detecting the angular position of the reference 16 around its axis A1.
- a toothed wheel 32 is mounted integral with the reference 1 6, to rotate with the latter about its axis of rotation A1.
- the wheel 32 meshes with a pinion 34 which is arranged in the same plane as the wheel 32 and which is integral with the rotary cursor 36 of a potentiometer 38.
- the cursor 36 is rotatably mounted about an axis A2, parallel to the axis A1, in the body of the potentiometer 38.
- the rotary cursor 36 of the potentiometer 38 is driven in rotation by an angle proportional to the pivoting of the gear 16, multiplied by the ratio of the diameters of the toothed wheel 32 and the pinion 34.
- this variation in resistance causes a variation in the voltage across its terminals, information which can be transmitted to a control unit (not shown) via a conductive cable 40.
- This cable 40 is twisted to form an elastic spiral, like a telephone cable, and it is advantageously wound around the drive screw 28 and around the flexible rod 31 to reach the control unit which can for example be arranged near the electric motor 30.
- the cable 40 is capable of adapting in length to the different positions of the sliding carriage 22 without it being necessary to provide a particular winding device.
- FIGS. 3 and 4 show different angular positions of the reference 16 relative to the mobile carriage 22.
- the reference 16 which is shown in the figures has a substantially triangular shape and it is mounted for rotation by one of its vertices 42 on the carriage 22.
- the slot 14 is arranged tangentially with respect to the rotary movement of the reference 16, along the edge 44 opposite the top 42 of the triangular reference 1 6.
- the reference 16 can of course have a different shape, without departing from the scope of the invention.
- the angular position of the reference 16 which can be represented by the angle ⁇ between a straight line "D" perpendicular to the slot 14 and the vertical direction.
- the angle ⁇ measured is less than the angle ⁇ 0 opti mal, that is to say if the portion of the second strand of the belt 12 which extends between the reference 16 and the passenger's shoulder is too vertical, which is particularly the case when the strapped passenger is a small person, the control unit interprets this value of the angle ⁇ as corresponding to a position too high of the reference 16 and controls the electric motor 30 in the direction in which it tends to lower the carriage 22 which carries the reference 16.
- the motor 30 is only stopped by the control unit when the angle ⁇ measured coincides with the predetermined optimal angle ⁇ o.
- the limits of the travel of the carriage 22 can for example be delimited using end-of-travel sensors (not shown), arranged at the upper and lower ends of the slide 24, to cause the electric motor 30 to stop.
- switches (not shown) are used which are carried by the carriage 22 and which are intended to cooperate with actuators arranged for example at the ends of the slide 24.
- the limits of the stroke can also be determined by means of a sensor for the angular position of the shaft of the electric motor.
- Such a device should not however make a constant adjustment of the height of the return 16. Indeed, the return 16 is likely to pivot when the passenger makes voluntary movements, for example to turn around, to grab an object at inside the vehicle, or for 9 readjust its position on its seat. I t should not that these deviations from the reference 16 from the predetermined optimal position cause the carriage 22 to move too frequently. Also, various solutions will make it possible to avoid such an inconvenience.
- a second solution is to provide a tolerance for movement of the gear 16 over an angular interval ⁇ 0 around the optimal value ⁇ 0 of the angular position of the gear 16.
- the control unit is then programmed not to cause movement of the carriage 22 as long as the angle ⁇ measured is included in the angular interval ⁇ 0 .
- Such a solution makes it possible to prevent the device from reacting to the slightest movement of the strapped person but risk being sensitive to a greater movement.
- the device reacts only if the reference 16 remains removed from its optimal position for a predetermined time interval.
- the device according to the invention has been shown here using a potentiometric sensor of the return position 16.
- other detection means can be used, such as HALL effect sensors.
- Such sensors by the way their contactless, in particular allow the use of a control unit, the production of which is simpler and less expensive.
- switches that would alternately be triggered by a lug secured to the reference 16 and which would deliver logic information representative of the angular zone in which the reference 16 is situated at a given instant.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Automotive Seat Belt Assembly (AREA)
Abstract
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP97929349A EP0904220A1 (fr) | 1996-06-14 | 1997-06-13 | Dispositif automatique de reglage en hauteur du renvoi d'une ceinture de securite |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR9607412A FR2749816B1 (fr) | 1996-06-14 | 1996-06-14 | Dispositif automatique de reglage en hauteur du renvoi d'une ceinture de securite |
FR96/07412 | 1996-06-14 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1997047499A1 true WO1997047499A1 (fr) | 1997-12-18 |
Family
ID=9493058
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/FR1997/001071 WO1997047499A1 (fr) | 1996-06-14 | 1997-06-13 | Dispositif automatique de reglage en hauteur du renvoi d'une ceinture de securite |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP0904220A1 (fr) |
FR (1) | FR2749816B1 (fr) |
WO (1) | WO1997047499A1 (fr) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9434349B1 (en) | 2015-04-24 | 2016-09-06 | Ford Global Technologies, Llc | Seat belt height adjuster system and method |
US10035513B2 (en) | 2015-04-24 | 2018-07-31 | Ford Global Technologies, Llc | Seat belt height system and method |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2516800A1 (fr) * | 1981-11-26 | 1983-05-27 | Autoflug Gmbh | Dispositif de reglage en hauteur de la ferrure de fixation ou de renvoi de la bande d'epaule d'un systeme de ceinture de securite |
EP0092105A1 (fr) * | 1982-04-21 | 1983-10-26 | Bayerische Motoren Werke Aktiengesellschaft, Patentabteilung AJ-3 | Dispositif d'ajustement pour point d'ancrage ou de renvoi d'une ceinture de sécurité |
GB2150012A (en) * | 1983-11-23 | 1985-06-26 | Autoflug Gmbh | Automatic height adjustment of seat belt anchorage |
DE3736056A1 (de) * | 1987-09-23 | 1989-04-13 | Bosch Gmbh Robert | Vorrichtung zur hoehenverstellung des oberen umlenkbeschlages fuer den gurt eines sicherheitsgurtsystemes, insbesondere eines kraftfahrzeuges |
-
1996
- 1996-06-14 FR FR9607412A patent/FR2749816B1/fr not_active Expired - Fee Related
-
1997
- 1997-06-13 WO PCT/FR1997/001071 patent/WO1997047499A1/fr not_active Application Discontinuation
- 1997-06-13 EP EP97929349A patent/EP0904220A1/fr not_active Withdrawn
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2516800A1 (fr) * | 1981-11-26 | 1983-05-27 | Autoflug Gmbh | Dispositif de reglage en hauteur de la ferrure de fixation ou de renvoi de la bande d'epaule d'un systeme de ceinture de securite |
EP0092105A1 (fr) * | 1982-04-21 | 1983-10-26 | Bayerische Motoren Werke Aktiengesellschaft, Patentabteilung AJ-3 | Dispositif d'ajustement pour point d'ancrage ou de renvoi d'une ceinture de sécurité |
GB2150012A (en) * | 1983-11-23 | 1985-06-26 | Autoflug Gmbh | Automatic height adjustment of seat belt anchorage |
DE3736056A1 (de) * | 1987-09-23 | 1989-04-13 | Bosch Gmbh Robert | Vorrichtung zur hoehenverstellung des oberen umlenkbeschlages fuer den gurt eines sicherheitsgurtsystemes, insbesondere eines kraftfahrzeuges |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9434349B1 (en) | 2015-04-24 | 2016-09-06 | Ford Global Technologies, Llc | Seat belt height adjuster system and method |
US10035513B2 (en) | 2015-04-24 | 2018-07-31 | Ford Global Technologies, Llc | Seat belt height system and method |
Also Published As
Publication number | Publication date |
---|---|
EP0904220A1 (fr) | 1999-03-31 |
FR2749816B1 (fr) | 1998-09-04 |
FR2749816A1 (fr) | 1997-12-19 |
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