US 11,970,061 B2
Input assembly with active haptic feedback and suppression of interfering vibrations
Tobias Bodenstein, Salz (DE); and Andreas Kramlich, Bad Neustadt a.d. Saale (DE)
Assigned to PREH GMBH, Bad Neustadt A. D. Saale (DE)
Appl. No. 17/051,000
Filed by PREH GMBH, Bad Neustadt a. d. Saale (DE)
PCT Filed Feb. 17, 2020, PCT No. PCT/EP2020/054060
§ 371(c)(1), (2) Date Oct. 27, 2020,
PCT Pub. No. WO2020/229000, PCT Pub. Date Nov. 19, 2020.
Claims priority of application No. 10 2019 112 461.1 (DE), filed on May 13, 2019.
Prior Publication US 2023/0113215 A1, Apr. 13, 2023
Int. Cl. G06F 1/16 (2006.01); B60K 37/06 (2006.01); G06F 3/01 (2006.01)
CPC B60K 37/06 (2013.01) [G06F 3/016 (2013.01); B60K 2370/158 (2019.05)] 19 Claims
OG exemplary drawing
 
1. An input assembly, comprising:
a carrier,
an input part, which is mounted on the carrier in a manner capable of vibrating along at least one direction of movement by means of mounting means, the input part having an input surface intended to be touched by an operator and with a touch-detection device for detecting a touch upon the input surface by the operator, and
an electromagnetic actuator for exciting a movement of the input part along the direction of movement by means of an electric control signal in order to generate a haptic feedback for the operator in the case of a touch by the operator, wherein the actuator has an additional mass that is resiliently mounted using a resilient mount and the actuator is attached to the input part via a vibration isolator;
wherein the mounting means for vibration-capable mounting further include a vibration damper for causing a damping of the movement of the input part;
wherein at least one of the control signal, a damping caused by the vibration isolator, and a further damping caused by the vibration damper is such that an absolute maximum amplitude of a system response, which is measured at the input part, to the excitation by means of the actuator triggered by the control signal occurs after a first maximum interval in time of 20 ms subsequent to a start of the control signal;
wherein at least one of the control signal, the damping caused by the vibration isolator, and the further damping caused by the vibration damper is such that a decay instant at which a maximum amplitude of the system response has decayed to 10% or less of the absolute maximum amplitude follows a previously reached absolute maximum amplitude after a second interval in time of maximally 30 ms; and
wherein a natural frequency of the vibrating system comprising the additional mass and its resilient mount is greater by a factor of A=√2 than a natural frequency of the vibration isolator.