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公开(公告)号：US11253055B2
公开(公告)日：2022-02-22
申请号：US16387056
申请日：2019-04-17
申请人： Braun GmbH
发明人： Robert Schäfer , Felix Merten
摘要： A toothbrush has a handle and a treatment head mounted for movement relative to the handle against a spring force when a treatment force is applied in at least one treatment direction onto the treatment head. A treatment force measurement unit for determining the applied treatment force includes a capacitive force senor having a first electrode fixedly mounted with respect to the handle and a second electrode mounted at a distance from the first electrode. The second electrode is movably mounted with respect to the handle. A spring unit is arranged between the first and the second electrode. A control circuit determines at least one parameter indicative of the capacitance between the first and second electrodes, wherein the second electrode is mechanically coupled with the treatment head and is arranged to be moved relative to the first electrode when the treatment force is applied at the treatment head.
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公开(公告)号：US10881193B2
公开(公告)日：2021-01-05
申请号：US16159148
申请日：2018-10-12
申请人： Braun GmbH
发明人： Norbert Schaefer , Martin Haas , Andreas Kramp , Robert Schäfer
摘要： A personal hygiene device has a handle, a treatment head, and a motor carrier disposed in the handle. The motor is pivot-mounted against at least one spring element arranged between the handle and the motor carrier. The motor has a stator portion fixedly mounted at the motor carrier and an armature portion spring mounted at the motor carrier to allow a motion relative to the motor carrier. The armature portion is coupled with a drive shaft connected with the treatment head for transferring motion thereto, wherein an external treatment force acting on the brush head leads to pivoting of the motor carrier relative to the handle. The motor has a motor permanent magnet and a coil for providing an alternating electromagnetic field interacting therewith to excite an oscillating motion of the drive shaft. A Hall sensor is fixedly mounted to the handle or to the motor carrier; and a sensor permanent magnet is fixedly mounted to the other one of the handle and motor carrier, so that a pivoting motion of the motor carrier leads to a relative movement between the sensor permanent magnet and the Hall sensor.
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公开(公告)号：US10433636B2
公开(公告)日：2019-10-08
申请号：US15153708
申请日：2016-05-12
申请人： Braun GmbH
发明人： Jannik Scheele , Martin Haas , Norbert Schaefer , Robert Schäfer , Sven Alexander Franke , Uwe Schober , Ingo Vetter , Frank Ziegler
摘要： A personal hygiene device has a handle, a treatment head mounted for relative movement of at least a portion thereof with respect to the handle against a restoring force when a treatment force is applied in at least one direction onto the treatment head, a treatment-force-measurement unit for determining the applied treatment force comprising a light-emitting element, a light-sensitive element, and a light-changing element arranged at least partly in the light path between the light-emitting element and the light-sensitive element, wherein the light-changing element and at least one of the light-emitting element and light-sensitive element are arranged to be moved relatively to each other when at least the portion of the treatment head is moved.
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公开(公告)号：US11751678B2
公开(公告)日：2023-09-12
申请号：US17120622
申请日：2020-12-14
申请人： Braun GmbH
发明人： Norbert Schaefer , Thomas Fritsch , Andreas Kramp , Andreas Larscheid , Marc Kunz , Robert Schäfer
CPC分类号： A46B15/0012 , A61C17/16 , A61C17/221 , A61C17/34 , A46B2200/1066
摘要： A personal hygiene device has a handle and a treatment head pivotably connected with the handle. Applying a treatment force against the treatment head causes a pivoting of the treatment head relative to the handle. A sensor, such as, e.g., a Hall sensor, fixedly secured with respect to one of the handle and the treatment head, measures a measurement variable. A sensor cooperation unit defines or influences the measurement variable in dependence on the relative position of the sensor and the sensor cooperation unit, such e.g., as a sensor permanent magnet, fixedly secured relative to one of the handle and the treatment head. A spring unit defines a rest position of the treatment head when no treatment force is applied. The spring unit has a first spring constant in the treatment direction and a second spring constant in a lateral direction, the second spring constant being at least about two times higher than the first spring constant.
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公开(公告)号：US10893746B2
公开(公告)日：2021-01-19
申请号：US16159394
申请日：2018-10-12
申请人： Braun GmbH
发明人： Norbert Schaefer , Thomas Fritsch , Andreas Kramp , Andreas Larscheid , Marc Kunz , Robert Schäfer
摘要： A personal hygiene device has a handle and a treatment head pivotably connected with the handle. Applying a treatment force against the treatment head causes a pivoting of the treatment head relative to the handle. A sensor, such as, e.g., a Hall sensor, fixedly secured with respect to one of the handle and the treatment head, measures a measurement variable. A sensor cooperation unit defines or influences the measurement variable in dependence on the relative position of the sensor and the sensor cooperation unit, such e.g., as a sensor permanent magnet, fixedly secured relative to one of the handle and the treatment head. A spring unit defines a rest position of the treatment head when no treatment force is applied. The spring unit has a first spring constant in the treatment direction and a second spring constant in a lateral direction, the second spring constant being at least about two times higher than the first spring constant.
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公开(公告)号：US11793619B2
公开(公告)日：2023-10-24
申请号：US16864563
申请日：2020-05-01
申请人： Braun GmbH
CPC分类号： A61C17/3436 , A46B15/0022 , A46B13/026 , A46B15/0006 , A46B15/0012 , A46B2200/1066
摘要： A personal hygiene device has a drive unit having a support, a stator fixedly mounted at the support, and an armature spring-mounted at the support for driven linear oscillating motion along a first longitudinal direction parallel to or coinciding with an x-axis of an x-y-z coordinate system. The armature has a center of gravity located in rest at a coordinate [xa, ya, za], and a drive shaft fixedly coupled with the armature and having a center of gravity located in rest at a coordinate [xd, yd, zd]. A first treatment head assembly, detachably connected to the drive shaft, has a center of gravity located in rest at a coordinate [xt1, yt1, zt1]. A secondary mass element, spring-mounted at the support for essentially linear oscillating motion along the first longitudinal direction, has a center of gravity located in rest at a coordinate [xm, ym, zm]. At least the coordinate [xa, ya, za] of the center of gravity of the armature has an offset in at least one of the y-direction and z-direction with respect to the coordinate [xd, yd, zd] of the center of gravity of the drive-shaft or with respect to the coordinate [xt1, yt1, zt1] of the center of gravity of the first treatment head assembly, i.e., ya≠yd and/or ya≠yt1 and/or za≠zd and/or za≠zt1; and the secondary mass element is configured such that the coordinate [xm, ym, zm] of the center of gravity of the secondary mass element is aligned with the coordinate [xj, yj, zj] of the joint center of gravity of the drive shaft, the first treatment head assembly and the armature in the at least one offset direction, i.e., ym=yj and zm=zj, so that a line connecting the coordinate [xm, ym, zm] of the center of gravity of the secondary mass element and the coordinate [xj, yjzj] of the joint center of gravity is parallel to or coincides with the x-axis.
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