EP4403065B1 - Elektrisches gurtschloss für eine sicherheitsgurteinrichtung eines fahrzeugs - Google Patents

Elektrisches gurtschloss für eine sicherheitsgurteinrichtung eines fahrzeugs

Info

Publication number
EP4403065B1
EP4403065B1 EP23152254.1A EP23152254A EP4403065B1 EP 4403065 B1 EP4403065 B1 EP 4403065B1 EP 23152254 A EP23152254 A EP 23152254A EP 4403065 B1 EP4403065 B1 EP 4403065B1
Authority
EP
European Patent Office
Prior art keywords
locking
locking element
tongue
buckle
frame
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP23152254.1A
Other languages
English (en)
French (fr)
Other versions
EP4403065A1 (de
Inventor
Abhijeet Atwadkar
Rakshith SHETTY
Abhijit Swain
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Autoliv Development AB
Original Assignee
Autoliv Development AB
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Autoliv Development AB filed Critical Autoliv Development AB
Priority to EP23152254.1A priority Critical patent/EP4403065B1/de
Publication of EP4403065A1 publication Critical patent/EP4403065A1/de
Application granted granted Critical
Publication of EP4403065B1 publication Critical patent/EP4403065B1/de
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • A—HUMAN NECESSITIES
    • A44—HABERDASHERY; JEWELLERY
    • A44B—BUTTONS, PINS, BUCKLES, SLIDE FASTENERS, OR THE LIKE
    • A44B11/00—Buckles; Similar fasteners for interconnecting straps or the like, e.g. for safety belts
    • A44B11/25—Buckles; Similar fasteners for interconnecting straps or the like, e.g. for safety belts with two or more separable parts
    • A44B11/2503—Safety buckles
    • A—HUMAN NECESSITIES
    • A44—HABERDASHERY; JEWELLERY
    • A44B—BUTTONS, PINS, BUCKLES, SLIDE FASTENERS, OR THE LIKE
    • A44B11/00—Buckles; Similar fasteners for interconnecting straps or the like, e.g. for safety belts
    • A44B11/25—Buckles; Similar fasteners for interconnecting straps or the like, e.g. for safety belts with two or more separable parts
    • A44B11/2503—Safety buckles
    • A44B11/2542—Safety buckles actuated by a rotatable element, e.g. combined with other actuating means

Definitions

  • the invention is an electric buckle for a safety belt device of a vehicle comprising the features of claim 1.
  • Document KR 200 386 214 Y1 discloses an electric buckle according to the preamble of claim 1.
  • Safety belt devices for vehicles comprise as basic components a safety belt and a retractor on which the safety belt may be wound on with a first end.
  • the safety belt device is designed as a 3-point belt it does further comprise a bracket, which is attached at a second end of the safety belt, a tongue which is slidably held on the safety belt and finally a buckle, in which the tongue is lockable.
  • the bracket and the retractor are mounted at the vehicle structure or directly at a seat on one side with respect to the occupant sitting on the seat, and the buckle is mounted on the other side at the vehicle structure or directly at the seat.
  • the safety belt device is fastened by retracting the safety belt from the retractor and locking the tongue in the buckle, wherein the locked tongue subdivides the safety belt in a diagonal shoulder belt section crossing the shoulder of the occupant from the retractor to the locked tongue and a pelvis belt section crossing the pelvis from the locked tongue to the bracket.
  • the safety belt device is designed as a 2-point belt it does comprise instead a tongue which is attached at the second end of the safety belt and a buckle, in which the tongue is lockable.
  • the retractor is mounted at one side of the seat at the vehicle structure or directly at the seat, while the buckle is mounted at the vehicle structure or directly at the seat on the other side of the seat.
  • the safety belt is designed to restrain the occupant via the shoulder, for example as a part of a 4-point belt
  • the retractor is mounted above the shoulder of the occupant at the vehicle structure or directly at the seat while the buckle is mounted below the shoulder directly at the seat or at the vehicle structure.
  • the safety belt device is fastened in both embodiments by retracting the safety belt from the retractor and locking the tongue in the buckle, wherein the safety belt crosses the pelvis or the shoulder of the occupant.
  • a buckle is used to lock the tongue, which comprises a mechanical locking mechanism having a frame, a locking element, which is moveable from a locking position in which the tongue is locked to a releasing position in which the tongue is released with respect to the frame, and a push button, which enables an easy manual operation of the buckle by the occupant to release the tongue. If the occupant presses the push button the locking element is moved to the releasing position, while the locking element is moved to the locking position when the occupant inserts the tongue into the buckle automatically.
  • the locking mechanism is based on a complex mechanical interaction of the different parts of the locking mechanism and specially to transfer the movement of the push button to the locking element and to initiate the movement to the locking position when inserting the tongue.
  • this mechanical locking mechanism affords a very precise interacting of all parts of the locking mechanism.
  • the buckle is subjected in an accident to extreme accelerations in all different directions and preferably to lateral accelerations in different directions especially if a reversible or irreversible pretensioner is activated to tension the safety belt. These accelerations are especially high in a design in which the pretensioner is arranged at the buckle itself and when the safety belt is tensioned via the tongue by pulling the buckle and the locked tongue.
  • an electric buckle comprising the features of claim 1. Further preferred embodiments may be obtained from the sub-claims, the figures and the related description.
  • the locking element is designed to be ring-shaped with a central opening through which the tongue extends with its locking section, wherein a connecting element is provided, which transfers the driving movement of the electric actuator to a rotational movement of the locking element around a rotation axis running in parallel to the insertion direction of the tongue with moving the locking element from the releasing position to the locking position and vice versa.
  • the suggested solution enables an easy locking and releasing of the tongue with an electric drive which can be triggered preferably via a manually actuatable push button for example at the buckle itself, at an instrument panel or in a door trim.
  • the electric drive of the buckle may also be triggered automatically by a signal of a sensor device detecting different driving situations, the presence of an occupant or also different emergency situations.
  • the locking and releasing movement of the locking element is realized by the suggested design by a rotational movement of the locking element, so that the locking mechanism may not be released under high lateral accelerations in an accident and especially during the tensioning of the safety belt.
  • the rotational movement of the locking element may be actuated very easily by an electric drive realized by an electric motor having a rotational driven shaft or by an electric actuator with a longitudinal driven element and a gear mechanism to transmit the longitudinal movement of the longitudinal driven element to the rotational movement of the locking element.
  • the locking element is designed to be ring-shaped with a central opening through which the tongue extends with its locking section, so that the locking element and the locking section of the tongue are overlapping each other, wherein the locking element with the central opening and the inserted locking section provide a more equal and preferably a symmetric mass distribution of the locking element and the locking section with respect to the rotational axis of the locking element and with respect to the insertion direction of the locking section of the tongue.
  • the suggested design of the locking element and the locking movement enable a very compact design of the buckle by the ring-shaped locking element and the inserted tongue in the locked state. This compact design can be reduced to a minimum of parts if the electric actuator is designed as an electric motor with a rotatable driven shaft and a direct connection of the shaft with the connecting element.
  • the central opening of the locking element comprises at least one locking wall with which the locking element engages into the recess of the locking section of the tongue in the locked position.
  • the locking wall enables a positive connection of the locking element and the locking section of the tongue to retain the tongue when pulling forces are acting in the safety belt.
  • the central opening of the locking element comprises at least one arc-shaped guiding section, and that a frame fixed bolt is provided, which engages the guiding section.
  • the frame fixed bolt engaging into the arc-shaped guiding section enables a guidance of the locking element during the movement from the locked to the released position and vice versa.
  • the locking element comprises at least one opening and the connecting element comprises at least one extending arm, wherein the connecting element engages with the arm into the opening.
  • the locking element and the connecting element are connected via the arm of the connecting element engaging into the opening of the locking element to transmit the driving movement of the electric drive via the connecting element to the locking element.
  • the recess in the frame is designed as an opening in a side wall of the frame, and the locking element is provided with at least one outwardly extending protrusion, with which the locking element engages into the recess of the frame.
  • the protrusion engaging into the opening enables a positive connection of the locking element to the frame and therefore, a vehicle fixed connection of the locking element in the locked position. Because of the design as an opening the locking element is fixed in at least two directions defined by the side walls of the opening.
  • the locking element is designed as a flat disc which is arranged perpendicular to the insertion direction of the tongue.
  • the locking element is rotated from the locking position to the releasing direction around an axis running parallel to the insertion direction of the locking section of the tongue. Because of the design of the locking element as a flat disc and the arrangement of the locking element perpendicular to the insertion direction the locking element is rotated in a plane, which is oriented perpendicular to the insertion direction, without performing a movement in the insertion direction of the locking section of the tongue. Therefore, the necessary installation space for the locking element may be reduced to a minimum.
  • the electric actuator is realized by an electric motor with a rotationally driven shaft
  • the connecting element comprises a tube-shaped projection in which the shaft is rotationally fixed connected.
  • the connecting element is therefore directly connected with the shaft of the electric motor, so that the connection and transmission of the rotary movement from the electric drive to the connecting element is realized with a minimum of parts and a minimum of costs.
  • the locking element is rotated in a rotational angle of 20 to 70, preferably 30 to 60 and most preferably 45 degrees from the locked to the released position and vice versa.
  • FIG. 1 it is shown an electric buckle 16 according to the invention of a not shown safety belt device with a tongue 15 and a bracket 17 for mounting the buckle 16 at a not shown vehicle structure or at a not shown seat structure.
  • the electric buckle 16 comprises an electric actuator 1, a locking mechanism 4 with a frame 14, a housing 18 and a bottom housing 20.
  • the electric actuator 1 may be realized by a linear drive, a piezo stack or the like, or by an electric motor with a rotational driven shaft 31.
  • the electric actuator 1 is driving a locking mechanism 4 like described afterwards when actuated based on a rotational movement of a locking element 6.
  • the lateral movement is transferred preferably by an additional gear mechanism to the rotational movement.
  • the locking mechanism 4 comprises a frame 14 and the ring-shaped locking element 6, wherein the frame 14 is designed as a load bearing rigid part connected via a rivet 19 with a bracket 17, which is mounted with its free end at the vehicle structure or at the seat structure. Therefore, the frame 14 is fixed at the vehicle structure or at the seat structure via the bracket 17 in a vehicle fixed and load bearing manner.
  • the frame 14 itself may be designed as a metal stamped or pressed part or as a reinforced composite material.
  • the frame 14 is realized with at least two opposing side frame walls 7 and 8, wherein each of the frame walls 7 and 8 is provided with an opening 9 and 10. In the present embodiment the frame 14 is realized with four side frame walls 7 and 8 and a front surface 32 which are connected to a closed cavity with a rectangular cross-section.
  • the electric buckle 16 comprises a cover 18 and a bottom cover 20 covering the frame 14, the locking mechanism 4 and the electric actuator 1 to the outside. Furthermore, the electric buckle 16 may comprise a reversible or irreversible pretensioner, a buckle presenter and/or a cable to attach the electric buckle 16 at the vehicle structure.
  • the frame 14 comprises several parts, wherein the frame 14 comprises two pairs of frame walls 7 and 8, which are arranged in parallel and in a distance to each other, and an upper front surface 32 with an insertion slit 22.
  • the housing 18 covering the frame 14 is provided also with an insertion slit 5, which is aligned to the insertion slit 22 of the frame 14, when the buckle 16 is assembled.
  • Both insertion slits 5 and 22 are dimensioned according to the dimensions of a locking section 23 of the tongue 15 and especially regarding to the dimensions of the locking section 23 in the cross section plus an additional clearance to enable an easy insertion of the tongue 15 with the locking section 23 into the buckle 16.
  • the frame walls 7 and 8 are provided with openings 9 and 10, wherein the openings 9 and 10 are arranged at predefined positions, so that the locking element 6 explained hereafter may engage in the locking position shown in Fig. 5 in both openings 9 and 10.
  • the upper front surface 32 is provided with two circular openings 35 arranged adjacent to the slit 22 like shown in Fig. 5 .
  • the pulling forces acting on the safety belt and thereby on the tongue 15 are retained by the locking element 6, which is retained by the frame walls 7 and 8, which can be seen as vehicle fixed by the attachment of the buckle 16 at the vehicle structure or at the seat by the attachment via the bracket 17.
  • the electric actuator 1 may be activated in condition to a signal of a sensor detecting a release procedure of the safety belt, and/or in condition to a signal generated by the operation of a button by the occupant or by rescue people in case of an accident or in condition to any other external signal.
  • the button to operate the buckle 16 may be placed at the buckle 16 directly or at any other part of the interior vehicle structure like for example at an instrument panel, at a door trim, at a seat cover or the like.
  • the locking mechanism 4 of the buckle 16 comprises the ring-shaped locking element 6, two bolts 21 and a connecting element 2 connecting the locking element 6 with the electric actuator 1.
  • the connecting element 2 itself comprises at the bottom side a tube-shaped projection 25 which extends downwardly from a base plate 33. Furthermore, the connecting element 2 comprises two arms 3 extending from the end sides of the base plate 33 upwardly to a U-shaped geometry of the connecting element 2 like also shown in the figures 2 and 3 . Furthermore, a sensor 11 is attached at the base plate 33 which is directed with the sensor surface in the direction of the upwardly extending arms 3 and in the direction of the front surface of the locking section 23 of the tongue 15 when the tongue is locked.
  • the tube-shaped projection 25 comprises a central bore 30, with a not round or polygon cross-section in which the shaft 31 of the electric actuator 1 engages. The projection 25 provides a rotationally fixed connection of the connecting element 2 with the shaft 31 of the electric actuator 1.
  • the ring-shaped locking element 6 comprises a central opening 26 and two smaller openings 27 arranged at opposite sides of the central opening 26 like shown in figure 1 and 4 .
  • the central opening 26 comprises further two opposing parallel arranged locking walls 28 and two opposing arc-shaped end-sections 29 connecting the locking walls 28 at their ends.
  • the bolts 21 each comprise a central cylindrical section 38, a head 37 with a bigger diameter and at their free ends a cylindrical section 36 with a smaller diameter.
  • the bolts 21 are fixed with their end sections 36 in the circular openings 35 of the front surface 32 of the frame 14. Furthermore, the bolts 21 are engaging the arc-shaped sections 29 of the central opening 26 of the locking element 6 with their central sections 38 and are exceeding further with their heads 37 the side rim of the arc-shaped sections 29 at the side facing towards the base plate 33.
  • the extending arms 3 are provided at their free ends with pins 40 which are sectioned by steps 39 to smaller outer dimensions from the arms 3.
  • the arms 3 engage with the pins 40 into the openings 27 of the locking element 6 and provide thereby a positive connection of the connecting element 2 with the locking element 6.
  • the locking element 6 is fixed by the pins 40 and the steps 39 in a predefined position in a plane which is arranged perpendicular to the insertion direction of the locking section 23.
  • the locking section 23 of the tongue 15 is provided with two recesses 24 in the side rims in form of cut-out sections, which are arranged in a distance to the free end of the locking section 23 which corresponds to the distance or is smaller than the distance between the front surface of the sensor 11 and the steps 39 of the arms 3, so that the recesses 24 are arranged opposite to the pins 40 and in the plane in which the locking element 6 is arranged when the tongue 15 is inserted with its locking section 23 into the buckle 16, like shown in the bottom right figure of figure 2 .
  • each of the opposing frame walls 7 and 8 are provided with an opening 9 and 10, which are designed as slits, which are arranged with their longer sides perpendicular to the insertion direction of the locking section 23 of the tongue 15 shown in figure 2 . Furthermore, the slits are arranged in the plane in which the locking element 6 is arranged.
  • the buckle 16 in a cross section from the bottom with the locking element 6 in the releasing position without the bolts 21 and with the bolts 21.
  • the locking element 6 got an outer shape which is adapted to the inner shape of the frame 14, with two opposing protrusions 34 and 31 extending radially to the outside.
  • the outer dimensions of the locking element 6 are smaller than the inner dimensions of the frame 14, so that the locking mechanism 4 with the locking element 6 and the connecting element 2 may be inserted into the frame 14 in the assembly process.
  • the locking element 6 When the electric actuator 1 is activated to lock an inserted tongue 15 the locking element 6 is rotated in an angle of 45 degrees in the direction of the arrow shown in the right figure of figure 5 to the locking position.
  • the locking element 6 may be also rotated instead in an angle between 20 to 70, preferably 30 to 60 degrees, as far as the tongue 15 may be inserted and released in the releasing position of the locking element 6 and is locked in the locking position of the locking element 6.
  • the locking element 6 gets into engagement with the opposing protrusions 34 and 41 into the opposing openings 9 and 10 in the side frame walls 7 and 8 of the frame 14.
  • the locking element 6 gets into engagement with the locking walls 28 into the recesses 24 of the locking section 23 of the tongue 15.
  • the locking element 6 provides of force-fitting connection to the tongue 15 and to the frame 14 in the locking position, so that the tongue 15 is locked also in a vehicle fixed manner via the locking element 6, the frame 14 and the bracket 17.
  • the locking element 6 is rotated backwards wherein protrusions 34 and 41 get out of the openings 9 and 10 and the locking walls 28 get out of the recesses 24 of the tongue 15 in the releasing position.

Landscapes

  • Automotive Seat Belt Assembly (AREA)

Claims (8)

  1. Elektrische Schnalle (16) umfassend
    - einen Rahmen (14) mit einem Einführschlitz (22) zum Einführen einer Zunge (15) einer Sicherheitsgurtvorrichtung und
    - ein Verriegelungselement (6), das von einer Verriegelungsposition, in der die Zunge (15) verriegelt wird, in eine Freigabeposition, in der die Zunge (15) freigegeben wird, und umgekehrt bewegbar ist, wobei
    - das Verriegelungselement (6) in der Verriegelungsposition in eine Aussparung des Rahmens (14) und eine Aussparung (24) eines Verriegelungsabschnitts (23) der Zunge (15) eingreift, wobei
    - ein elektrischer Aktuator (1) bereitgestellt ist, der die Bewegung des Verriegelungselements (6) einleitet, wenn er aktiviert wird,
    dadurch gekennzeichnet, dass
    - das Verriegelungselement (6) konstruiert ist, um ringförmig mit einer zentralen Öffnung (26), durch die sich die Zunge (15) mit ihrem Verriegelungsabschnitt (23) erstreckt, zu sein, wobei
    - ein Verbindungselement (2) bereitgestellt ist, das die Antriebsbewegung des elektrischen Aktuators (1) in eine Drehbewegung des Verriegelungselements (6) um eine Drehachse herum, die parallel zu der Einführrichtung der Zunge (15) verläuft, überträgt, wobei das Verriegelungselement (6) von der freigegebenen Position in die verriegelte Position und umgekehrt bewegt wird.
  2. Elektrische Schnalle (16) nach Anspruch 1, dadurch gekennzeichnet, dass
    - die zentrale Öffnung (26) des Verriegelungselements (6) mindestens eine Verriegelungswand (28) umfasst, mit der das Verriegelungselement (6) in der Verriegelungsposition in die Aussparung (24) des Verriegelungsabschnitts (23) der Zunge (15) eingreift.
  3. Elektrische Schnalle (16) nach Anspruch 1 oder 2,
    dadurch gekennzeichnet, dass
    - die zentrale Öffnung (26) des Verriegelungselements (6) mindestens einen bogenförmigen Führungsabschnitt (29) umfasst und ein rahmenfester Bolzen (21) bereitgestellt ist, der den Führungsabschnitt (29) in Eingriff nimmt.
  4. Elektrische Schnalle (16) nach einem der Ansprüche 1 bis 3,
    dadurch gekennzeichnet, dass
    - das Verriegelungselement (26) mindestens eine Öffnung (27) umfasst und das Verbindungselement (2) mindestens einen sich erstreckenden Arm (3) umfasst, wobei
    - das Verbindungselement (2) mit dem Arm (3) in die Öffnung (27) eingreift.
  5. Elektrische Schnalle (16) nach einem der Ansprüche 1 bis 4,
    dadurch gekennzeichnet, dass
    - die Aussparung in dem Rahmen (14) als eine Öffnung (9,10) in einer Seitenrahmenwand (7,8) des Rahmens (14) konstruiert ist und
    - das Verriegelungselement (6) mit mindestens einem sich nach außen erstreckenden Vorsprung (34,41) versehen ist, mit dem das Verriegelungselement (6) in die Aussparung des Rahmens (14) eingreift.
  6. Elektrische Schnalle (16) nach einem der Ansprüche 1 bis 5,
    dadurch gekennzeichnet, dass
    - das Verriegelungselement (6) als eine flache Scheibe konstruiert ist, die senkrecht zu der Einführrichtung der Zunge (15) angeordnet ist.
  7. Elektrische Schnalle (16) nach einem der Ansprüche 1 bis 6,
    dadurch gekennzeichnet, dass
    - der elektrische Aktuator (1) durch einen elektrischen Motor mit einer drehangetriebenen Welle (31) realisiert ist und
    - das Verbindungselement (2) einen rohrförmigen Ansatz (25) umfasst, in dem die Welle (31) drehfest verbunden ist.
  8. Elektrische Schnalle (16) nach einem der Ansprüche 1 bis 7,
    dadurch gekennzeichnet, dass
    - das Verriegelungselement (6) in einem Drehwinkel von 20 bis 70, vorzugsweise 30 bis 60 und am meisten bevorzugt 45 Grad von der verriegelten in die freigegebene Position und umgekehrt gedreht wird.
EP23152254.1A 2023-01-18 2023-01-18 Elektrisches gurtschloss für eine sicherheitsgurteinrichtung eines fahrzeugs Active EP4403065B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP23152254.1A EP4403065B1 (de) 2023-01-18 2023-01-18 Elektrisches gurtschloss für eine sicherheitsgurteinrichtung eines fahrzeugs

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP23152254.1A EP4403065B1 (de) 2023-01-18 2023-01-18 Elektrisches gurtschloss für eine sicherheitsgurteinrichtung eines fahrzeugs

Publications (2)

Publication Number Publication Date
EP4403065A1 EP4403065A1 (de) 2024-07-24
EP4403065B1 true EP4403065B1 (de) 2025-08-06

Family

ID=84982447

Family Applications (1)

Application Number Title Priority Date Filing Date
EP23152254.1A Active EP4403065B1 (de) 2023-01-18 2023-01-18 Elektrisches gurtschloss für eine sicherheitsgurteinrichtung eines fahrzeugs

Country Status (1)

Country Link
EP (1) EP4403065B1 (de)

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR200386214Y1 (ko) * 2005-01-19 2005-06-13 김세웅 영구자석을 이용한 안전밸트
TWI776642B (zh) * 2021-08-19 2022-09-01 智崴資訊科技股份有限公司 可顯示鎖固狀態的扣具裝置

Also Published As

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