ADJUSTING DEVICE FOR A SAFETY BELT WITH AN EXTENDABLE BELT GUIDING ELEMENT

Abstract

An adjusting device for a safety belt in a vehicle comprises at least one extendable belt guiding element which is provided for guiding a portion of the safety belt and at least one supporting element which is connected to the belt guiding element and which is able to be at least partially extended together with the belt guiding element. The belt guiding element is able to be extended from a resting position in a direction of extension in order to facilitate the grasping of the safety belt by a vehicle occupant when fastening the safety belt. The supporting element is flexible but in the extended state of the belt guiding element is sufficiently rigid at least in one portion transversely to the direction of extension such that the belt guiding element is held in an extended position via the now rigid portion of the supporting element.

Claims

1-23. (canceled)

24. An adjusting device for a safety belt in a vehicle comprising at least one extendable belt guiding element which is provided for guiding a portion of the safety belt and at least one supporting element which is connected to the belt guiding element and which is able to be at least partially extended together with the belt guiding element, wherein the belt guiding element is able to be extended from a resting position in a direction of extension in order to facilitate the grasping of the safety belt by a vehicle occupant when fastening the safety belt, the supporting element is flexible but in the extended state of the belt guiding element is sufficiently rigid at least in one portion transversely to the direction of extension such that the belt guiding element is held in an extended position via the now rigid portion of the supporting element, and the belt guiding element is mounted so as to be extendable on an adjustable belt guiding subassembly which is able to be adjusted in a direction of adjustment which is different from the direction of extension of the belt guiding element and the supporting element being deflected thereon at least once when the belt guiding element is in its resting position.

25. The adjusting device as claimed in claim 24, wherein via an adjusted position of the belt guiding subassembly the position of a deflection point for the safety belt is able to be adjusted, the safety belt extending from said deflection point in the direction of the shoulder of a vehicle occupant who is fastened in by the safety belt.

26. The adjusting device as claimed in claim 24, wherein the belt guiding element is provided for guiding a portion of the safety belt in the region of a shoulder of a vehicle occupant fastened in by the safety belt.

27. The adjusting device as claimed in claim 24, wherein the flexible supporting element is deflected on the belt guiding subassembly at least once by at least 60.

28. The adjusting device as claimed in claim 24, wherein the flexible supporting element is mounted on a guide of the belt guiding subassembly so as to be extendable, such that the supporting element protrudes from an outlet opening of the guide at least with a now rigid portion when the belt guiding element is extended.

29. The adjusting device as claimed in claim 24, wherein the belt guiding subassembly is able to be adjusted by means of the supporting element in the direction of adjustment.

30. The adjusting device as claimed in claim 29, wherein the flexible supporting element is mounted so as to be extendable on a guide of an adjusting part of the belt guiding subassembly and the adjusting part is coupled to a control mechanism, an adjusting force exerted via the flexible supporting element being able to be transmitted thereby to the adjusting part in order to adjust the adjusting part.

31. The adjusting device as claimed in claim 30, wherein by means of the control mechanism an adjusting movement of the supporting element is able to be controlled so that an adjusting force exerted on the supporting element is able to be initially transmitted to the adjusting part in order to adjust the adjusting part, and after the adjusting part has traveled over a predetermined adjustment path, the supporting element is adjusted relative to the adjusting part in order to extend the belt guiding element in the direction of extension.

32. The adjusting device as claimed in claim 30, wherein the adjusting part is displaceably mounted in the direction of adjustment and the supporting element is able to be adjusted in its retracted state in the direction of adjustment and is deflected in the direction of extension via a deflection region provided in the guide, wherein the supporting element is able to be prevented from extending in the direction of extension by an adjustable stop of the control mechanism, so that the supporting element adjusted in the direction of adjustment displaces the adjusting part until the stop permits an adjustment of the supporting element relative to the adjusting part and in the direction of extension.

33. The adjusting device as claimed in claim 30, wherein the control mechanism comprises a flexible control traction means.

34. The adjusting device as claimed in claim 32, wherein the control mechanism comprises a flexible control traction means and wherein an adjusting force is able to be transmitted by means of the flexible control traction means in order to adjust the stop from a locked position in which the stop locks the supporting element against an adjustment relative to the adjusting part in the direction of extension, into a released position in which the stop does not lock the supporting element against such an adjustment.

35. The adjusting device as claimed in claim 24, wherein the belt guiding element, in its resting position and when the supporting element is retracted, is positively blocked on a fastening part.

36. The adjusting device as claimed in claim 24, wherein the belt guiding element forms a cladding portion, an outlet opening for the safety belt being at least partially covered thereby when the belt guiding element is in its resting position.

37. The adjusting device as claimed in claim 24, wherein the supporting element which is flexible per se in the extended state of the belt guiding element is rigid due to partial elements connected together or due to its shape.

38. The adjusting device as claimed in claim 37, wherein the supporting element comprises a chain or a strip.

39. The adjusting device as claimed in claim 38, wherein links of the chain in the extended state of the belt guiding element are fixed together automatically via a positively locked connection and/or via a frictional connection.

40. The adjusting device as claimed in claim 39, wherein for fixing the links together at least one magnet and/or an elongated traction means is provided.

41. The adjusting device as claimed in claim 40, wherein one end (210) of the at least one traction means is connected to the belt guiding element or a link of the chain fixed thereto and the traction means extends along the links of, the chain.

42. The adjusting device as claimed in claim 38, wherein the links of the chain are pretensioned relative to one another such that links of the chain in the extended state of the belt guiding element are fixed together in a chain portion and via the chain portion made rigid thereby, transversely to the direction of extension, the belt guiding element is held in an extended position and when adjusting the belt guiding element into its resting position a fixing of the links together is able to be released so that the previously rigid chain portion becomes flexible again.

43. The adjusting device as claimed in claim 24, wherein a drive is provided, the extension of the belt guiding element and/or the adjustment of the adjustable belt guiding subassembly, on which the belt guiding element is mounted so as to be extendable, being able to take place by an externally applied force.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0041] Further advantages and features of the invention are revealed in the following description of exemplary embodiments with reference to the figures.

[0042] FIG. 1A shows a detail of a B-pillar of a motor vehicle comprising an exemplary embodiment of an adjusting device according to the invention with a supporting element designed as a link chain for extending a belt guiding element which is located in FIG. 1A in a resting position.

[0043] FIG. 1B shows in a side view coinciding with FIG. 1A the adjusting device withrelative to FIG. 1Athe belt guiding subassembly adjusted upwardly and a belt guiding element arranged thereon in an extended state.

[0044] FIG. 2 shows in a side view and at an enlarged scale the belt guiding element with the end of the link chain fastened thereto.

[0045] FIGS. 3A-3C show in different adjusting phases a further exemplary embodiment of an adjusting device according to the invention with a control mechanism, an adjusting force applied to the supporting element being able to be used thereby both for adjusting the belt guiding subassembly and for extending the belt guiding element.

DETAILED DESCRIPTION

[0046] An adjusting device V according to the invention which is accommodated on a B-pillar B of a motor vehicle is shown in FIGS. 1A and 1B. FIGS. 1A and 1B in this case show the B-pillar B in side view with a view of the vehicle interior and without the cladding conventionally fixed thereto.

[0047] The adjusting device V comprises a belt guiding subassembly 1 for a safety belt of a vehicle seat. A portion of the safety belt, which is not shown in FIGS. 1A and 1B for reasons of clarity, is guided along the B-pillar B via the belt guiding subassembly 1. The belt guiding subassembly 1 in this case comprises, in particular, an adjusting part 10 which is able to be adjusted in the longitudinal direction of extent of the B-pillar B, and a belt guiding element 12 fixed to the adjusting part at the upper end of the adjusting part 10. A belt outlet opening 120 is defined via the belt guiding element 12, the safety belt being guided through said belt outlet opening, from the inside of the hollow space of the B-pillar B covered by cladding. The adjusting part 10 in this case is displaceably mounted on a guide part 5, for example in the form of a guide rail, which is fixed to a vehicle part 4 of the B-pillar B fixed to the bodywork. The adjusting part 10, for example via a drive spindle not shown here, is longitudinally displaceable along the guide part 5, together with the first belt guiding element 12 fixed to the adjusting part and an extendable second belt guiding element 3. The second extendable belt guiding element 3 is arranged in front of the (first) belt guiding element 12 fixed to the adjusting part.

[0048] Whilst a belt height of the safety belt is able to be adjusted via the adjusting part 10 of the belt guiding subassembly 1 by adjusting in a direction of adjustment R1 extending substantially parallel to the longitudinal direction of extent of the B-pillar B, the extendable belt guiding element 3 is able to be adjusted substantially perpendicular thereto in a direction of extension R2 in order to facilitate the grasping of the safety belt by a vehicle occupant when fastening the safety belt. In the extended state of the belt guiding element 3, therefore, a portion of the safety belt extends between the belt guiding element 12 on the B-pillar B fixed to the adjusting part and the extended belt guiding element 3 displaced to the front. The safety belt is thus firstly deflected on the belt guiding element 12 fixed to the adjusting part in the direction of the extended belt guiding element 3 and secondly in the direction of a lower fastening point provided on the side of a vehicle seat.

[0049] For the extension and retraction of the belt guiding element 3 a supporting element in the form of a link chain 2 constructed from a plurality of chain links 20 and connected to the extendable belt guiding element 3 is adjustably mounted on the adjusting part 10. The link chain 2 is flexible per se via its individual chain links 20 and is fully received in a guide channel 102 of the adjusting part 10 when the belt guiding element 3 is retracted and is in the resting position shown in FIG. 1A. In the guide channel 102 the link chain 2 is deflected once by substantially 90. In this manner, the link chain 2 extends in a retracted state inside a guide defined by the guide channel 102 proceeding from a rear chain end 2a, primarily along the longitudinal axis of the B-pillar B and via a deflection region 102a of the guide channel 102, in which the link chain 2 is deflected by substantially 90, to a front chain end 2b which is present on an outlet opening 102b of the guide channel 102. The front chain end 2b is in this case defined by a chain member 20 which in the resting position of the belt guiding element 3 is in the outlet opening 102b and is connected to the belt guiding element 3.

[0050] By extending the link chain 2 out of the outlet opening 102b the belt guiding element 3 fixed thereto is adjusted and also extendedin the direction of a vehicle front. The individual chain links 20 of the link chain 2 in this case are pretensioned relative to one another such that the links of a chain portion extended from the outlet opening 102b are automatically fixed together by a positively locked and frictional connection and the chain portion is then sufficiently rigid in order to retain the belt guiding element 3 in an extended position. The extended chain portion in this case, in particular, is rigid transversely to the direction of extension R2 so that the belt guiding element 3 may be extended substantially along a horizontal line and the link chain 2 in this case does not bend or sag.

[0051] The pretensioning for automatically fixing the chain links 20 together, when the belt guiding element 3 is intended to be extended, is produced via a traction cable 21 and at least one spring element designed here as a compression spring 22. The individual chain links 20 are arranged in succession along the traction cable 21 and connected to the traction cable 21, for example by the traction cable 21 in each case being guided through a through-opening of the individual chain links 20. Thus the traction cable 21 extends through all of the individual chain links 20 which are movable relative to one another. One end of the traction cable in this case is fixed to the rear chain end 2a which always remains in the guide channel 102. The other traction cable end 210 is secured to a front chain link of the front chain end 2b, and the belt guiding element 3 being fixed thereto. The traction cable end 210 is in this case supported on the compression spring which holds the traction cable under tension and forces the two chain ends 2a and 2b toward one another. The compression spring 22 in this case is mounted in a channel-shaped hollow space or a channel-shaped recess of the final chain link 20 and supported in the longitudinal direction of the traction cable against a wall portion of this final chain link 20. By the spring force applied by the compression spring 22, therefore, the individual chain links 20 are pressed against one another but by the application of the spring force said chain links are also able to be released from one another again, so that the link chain 2 is sufficiently flexible in order to be deflected in the deflection region 102a of the guide channel 102.

[0052] The extension and retraction of the belt guiding element 3 in the present case is electronically controlled and undertaken by an electromotive drive 11. This drive 11 is mounted on the adjusting part 10. Via a drive pinion this drive 11 meshes with a toothed region which is formed on each chain link 20 (see FIG. 2). In this manner, the drive 11 is able to displace the link chain 2 along the guide channel 102 and adjust the belt guiding element 3 connected thereto.

[0053] The belt guiding element 3 in the present case comprises a deflection opening 30 which is designed in the shape of a banana and which defines a permanent deflection point for the safety belt. Via the belt guiding element 3, therefore, the safety belt in the present case is not only able to be moved into an advantageous forward displaced position for the vehicle occupant to grasp the safety belt, but is also retained thereon and guided when the vehicle occupant has fastened the safety belt. In this case, both a belt height and the height at which the belt guiding element 3 is intended to be extended is individually adjustable and is preferably able to be altered even when the belt guiding element 3 is extended.

[0054] The belt guiding element 3 additionally forms in the present case a cladding portion, the belt outlet opening 120 being partially covered thereby in the resting position of the retracted belt guiding element 3. The cladding portion of the belt guiding element 3, therefore, may be inserted for example into a cladding of the B-pillar B. As a result, the belt guiding element 3 in its resting position not only contributes to an aesthetically attractive overall appearance but also closes in a protective manner the outlet opening 120 of the belt guiding element 12 fixed to the adjusting part.

[0055] From FIG. 2 it may also be seen that the belt guiding element 3 in the present case is provided with a rib structure 31. Via the rib structure 31 the belt guiding element 3 is reinforced. Moreover, the belt guiding element 3 has a fastening portion 32 below the deflection opening 30. Via the fastening portion 32, the belt guiding element 3 is fixed to the front extendable end 2b of the link chain 2.

[0056] A further variant of an adjusting device V according to the invention is illustrated by FIGS. 3A, 3B and 3C. In this case, a supporting element in the form of a link chain 2 is provided once again in order to extend a belt guiding element 3 in a direction of extension R2. The link chain 2 is also arranged on an adjustable belt guiding subassembly 1 which is adjustable in the direction of adjustment R1 extending substantially perpendicular to the direction of extension R2. In the variant of FIGS. 3A to 3C, however, the adjusting part 10 which forms the guide channel 102 for the link chain 2 is designed to be able to be extended via the link chain 2 itself, as will be described hereinafter in more detail.

[0057] The adjusting part 10 in this case is displaceably mounted on the guide part 5 which is fixed to the cladding or bodywork and is thus stationary. The guide part 5 in this case may be configured as a guide rail, guide sleeve or guide tube, wherein the adjusting part is displaceably mounted in the direction of adjustment R1 along an inner or outer peripheral surface of the guide part 5. In the present case the guide part 5 in the retracted state of the link chain 2 also receives several chain links 20 whilst further chain links 20 and the extendable end of the link chain 2 are mounted in the adjusting part 10. The link chain 2 mounted in a retracted state with its extendable end inside the adjusting part 10, in the present case serves not only for extending the belt guiding element 3 connected thereto but also for displacing the adjusting part 10 relative to the guide part 5. Thus, the link chain 2 is locked via an adjustable stop 70, which is provided on or inside the adjusting part 10, against an adjustment relative to the adjusting part 10 in the direction of extension R2. In the variant of FIGS. 3A to 3C, the stop 70 is designed to be pivotable and provided in the region of the outlet opening 102b of the guide channel 102. In this case, even in the retracted state the link chain 2 is already deflected via the deflection region 102a in the guide channel 102 and bears with a chain link 20 in the region of the outlet opening 102b against the stop 70, when said stop is in a locked position illustrated in FIG. 3A.

[0058] If the link chain 2 is now driven to perform an adjusting movement via the drive 11 which is illustrated in FIGS. 3A to 3C by a motor 110 and a gear mechanism 111, the stop 70 located in its locked position prevents the extension of the link chain 2 from the adjusting part 10 in the direction of extension R2. Due to the displaceable mounting of the adjusting part 10 relative to the guide part 5, however, the link chain 2 now forces the adjusting part 10 in the direction of adjustment R1 and displaces said adjusting part relative to the guide part 5 in the direction of adjustment R1. The adjusting part 10 of the belt guiding subassembly 1 is, therefore, in the present case displaced via the link chain 2 substantially parallel to a vehicle vertical axis, in the manner of a telescopic drive. In this case, due to the fixing of the belt guiding element 3 to the link chain 2, the belt guiding element 3 is (upwardly) adjusted therewith in the direction of adjustment R1.

[0059] If the adjusting part 10 has reached a desired adjusting height and thus has traveled over a defined adjusting path in the direction of adjustment R1, the stop 70 is pivoted into a released position according to FIG. 3B, so that the one end of the link chain 2 is able to extend out of the adjusting part 10 at the outlet opening 102b. The stop 70 is in this case part of a control mechanism 7 which via the stop 70 controls the use of the adjusting force applied via the drive 11 onto the link chain 2, such that successive adjusting movements of the link chain 2 are implemented, on the one hand, together with the adjusting part 10 and, on the other hand, relative thereto.

[0060] To this end, the control mechanism further comprises a control traction means in the form of a control cable 71 which is fastened at one end via a fastening 71a to the guide part 5 and at its other end via a further fastening 71b to the stop 70. If the adjusting part 10 which is L-shaped in cross section is adjusted sufficiently relative to the guide part 5, the control cable 71 is tensioned sufficiently for an adjusting force exerted thereby onto the stop 70 to exceed a restoring force of a restoring spring acting on the stop 70, which pretensions the stop 70 in its locked position. The control cable 71, therefore, pulls the stop 70 into its released position and pivots the stop counter to the restoring force of the restoring spring, so that the outlet opening 102b is no longer blocked by the stop 70. If the stop 70 according to FIG. 3C is in its released position, the link chain 2 driven further by the drive 11 is forced out of the adjusting part 10optionally locked via a further stop against a further adjustment in the direction of adjustment R1. As a result, the belt guiding element 3 moves in the direction of extension R2 so that the grasping of a safety belt is facilitated, a belt strap 6 thereof being shown in FIGS. 3A to 3C.

[0061] The belt strap 6 is deflected on the belt guiding element 3 on a belt guiding surface 300, which is curved in a convex manner, and is always retained in a defined position thereby. In contrast to the variant of FIGS. 1A-1B and 2, the belt guiding element 3 in this case also has at least one positively locked connecting region 310 via which the belt guiding element 3 in its resting position is positively blocked on an immovably fixed fastening part 8. The positively locked connecting region 310 is in this case provided on a lower face of the belt guiding element 3 opposing the belt guiding surface 300, so that the belt guiding element 3 in its resting position is able to be blocked thereby, but with an adjustment of the belt guiding subassembly 1 in the direction of adjustment R1 is raised by the fastening part 8 and thereby the positively locked connection may be easily released.

[0062] The fastening part 8 is preferably fixed in the region of the B-pillar B via a fixing portion 80. This fixing portion 80 has, for example, a fastening opening for a fastening element, such as for example a rivet, a bolt or a screw. A connecting arm 81 is provided on the fixing portion 80, said connecting arm connecting the fixing portion 80 to a retaining portion 82 of the fastening part 80. A positively locked connecting region 820 which is complementary to the positively locked connecting region 310 of the belt guiding element 3 is provided on the retaining portion 82. If the belt guiding element 3 according to FIG. 3A is in its resting position, the two positively locked connecting regions 310 and 820 are in engagement with one another so that the belt guiding element 3 is blocked and supported on the fastening part 8.

[0063] Due to the positively locked connection with the fastening part 8, the belt guiding element 3 in its resting position is able to be adjusted exclusively in the direction of adjustment R1 together with the belt guiding subassembly 1. If the adjusting part 10 is displaced upwardly via the link chain 2, the engagement of the positively locked connecting region 310 of the belt guiding element 3 with the positively locked connecting region 820 of the fastening part 8 is released and the belt guiding element 3 is spaced apart from the fastening part 8 and the retaining portion 82 thereof. In this manner, the belt guiding element 3 is no longer prevented by the fastening part 8 from an adjustment in the direction of extension R2, when the adjusting part 10 according to FIGS. 3B and 3C has been adjusted (upwardly) in the direction of adjustment R1. At the same time, however, in the resting position of the belt guiding element 3 an additional securing and support of the belt guiding element 3 is provided via the fastening element 8.

[0064] The adjusting part 10, in particular in a variant according to FIGS. 3A to 3C, is provided in the region of the outlet opening 102b with a cover 101 so that one end of the adjusting part 10, on which the link chain 2 is able to be extended, may be present visibly on the cladding of the B-pillar B. Preferably, in this case the adjustably mounted stop 70 is also covered by the cover 101 as is the control cable 71. The control cable 71 may also be displaced along the adjusting part 10 and, in particular, the outer face of the guide channel 102 via at least one guide channel or one or more guide eyes and/or via one or more guide projections.

LIST OF REFERENCE NUMERALS

[0065] 1 Belt guiding subassembly [0066] 10 Adjusting part [0067] 101 Cover [0068] 102 Guide channel (guide) [0069] 102a Deflection region [0070] 102b Outlet opening [0071] 11 Drive [0072] 110 Motor [0073] 111 Gear mechanism [0074] 12 Belt guiding element (fixed to the adjusting part) [0075] 120 Belt outlet opening [0076] 2 Link chain (supporting element) [0077] 20 Chain link [0078] 21 Traction cable [0079] 210 Traction cable end [0080] 22 Compression spring (spring element) [0081] 2a, 2b Chain end [0082] 3 Belt guiding element [0083] 30 Deflection opening [0084] 300 Belt guiding surface [0085] 31 Rib structure [0086] 310 Positively locked connecting region [0087] 32 Fastening portion [0088] 4 Vehicle part [0089] 5 Guide part [0090] 6 Belt strap [0091] 7 Control mechanism [0092] 70 Stop [0093] 71 Control cable (control traction means) [0094] 71a, 71b Fastening [0095] 8 Fastening part [0096] 80 Fixing portion [0097] 81 Connecting arm [0098] 82 Retaining portion [0099] 820 Positively locked connecting region [0100] B B-pillar [0101] R1 Direction of adjustment [0102] R2 Direction of extension [0103] V Adjusting device