公开(公告)号：US20240140356A1

公开(公告)日：2024-05-02

申请号：US18548759

申请日：2022-02-24

Applicant: Autoliv Development AB

Inventor： Philip RINGS ,  Fooke KUTSCHER

IPC: B60R22/343

CPC classification number: B60R22/343 ,  H02M3/04

Abstract: A belt retractor unit with a housing, a belt reel rotatably mounted in this housing, a blocking unit for blocking the belt reel against the housing, wherein the blocking unit has an actuator unit with an electromagnet and a control apparatus for controlling the electromagnet, which has a power input, a power output connected to the electromagnet and at least one signal input for receiving a control signal and/or a sensor unit for generating a control signal, wherein the control apparatus has at least a first active switching state and a passive switching state, wherein in the first active switching state an electric current flows between the power output and the electromagnet, the current intensity of which is greater than in the passive switching state, wherein the control apparatus has between the power input and the power output at least one DC/DC converter acting as a constant current source, so that the current intensity in the first active switching state has a defined first value independent of the voltage applied to the power input.

公开(公告)号：US20240157909A1

公开(公告)日：2024-05-16

申请号：US18550225

申请日：2022-03-14

Applicant: Autoliv Development AB

Inventor： Philip RINGS ,  Florian KUNZLER

IPC: B60R22/343

CPC classification number: B60R22/343

Abstract: A seatbelt retractor having a toothed control disk on a belt shaft and an electrically actuatable blocking device and a blocking lever mounted in a pivot bearing, wherein the electrically actuatable blocking device stops the control disk with respect to the belt shaft and, as a result, the belt shaft is blocked in the pull-out direction, wherein the blocking lever has a lever arm upon which a first spring acts, which spring preloads into position the blocking lever having an arranged blocking tip so that this blocking tip engages in the toothing of the control disk, and an electromagnet that is arranged in the housing, wherein the blocking tip is retracted from the toothing of the control disk, wherein a second spring rests with its blocking arm against the second spring and is loaded by the blocking arm.

公开(公告)号：US20240140355A1

公开(公告)日：2024-05-02

申请号：US18548457

申请日：2022-02-24

Applicant: Autoliv Development AB

Inventor： Philip RINGS ,  Martin PAWLOWSKI ,  Heiko HINRICHS

IPC: B60R22/343 ,  B60R22/40 ,  B60R22/48

CPC classification number: B60R22/343 ,  B60R22/40 ,  B60R22/48 ,  B60R2022/4808

Abstract: A belt retractor unit with a housing, a rotatably mounted belt reel, a blocking unit for blocking the belt reel, wherein the blocking unit has an electrically controllable actuator unit, a control apparatus for controlling the actuator unit, which has a sensor apparatus for measuring at least one horizontal acceleration value and a switching apparatus for controlling the actuator unit in dependence on at least the at least one horizontal acceleration value, wherein the belt retractor unit has a first emergency state, in which the magnitude of the horizontal acceleration value is above a first limit value and in which the belt reel is blocked, and an unblocking state in which the magnitude of the horizontal acceleration value is below the first limit value.

公开(公告)号：US20220332280A1

公开(公告)日：2022-10-20

申请号：US17753661

申请日：2020-09-03

Applicant: AUTOLIV DEVELOPMENT AB

Inventor： Antto-Christian GLAESSER ,  Florian KUNZLER ,  Philip RINGS

IPC: B60R22/343 ,  H01F7/08

Abstract: A belt retractor having an electrically actuatable locking device comprising a housing with a base plate and an upright first limb, a locking lever mounted pivotably on the upright first limb with a steel plate which is spring-loaded, and an electromagnet arranged in the housing and having a coil with a through opening, a first iron core which is arranged in the through opening, when a voltage is applied to the coil, exerts a magnetic force on the locking lever via the steel plate and actuates the locking lever for triggering a locking or unlocking movement against the force of the spring. The movement of the locking lever is enforced by a first magnetic circuit formed by the first iron core, the upright first limb and the portions of the base plate and of the locking lever between the first iron core and the upright first limb.