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Operating unit for a vehicle

專利號(hào)
US11888372B2
公開日期
2024-01-30
申請(qǐng)人
BEHR-HELLA THERMOCONTROL GMBH（DE Lippstadt）
發(fā)明人
Stefan Kirsch; Pasi Kemppinen
IPC分類
H02K35/00; G06F3/039; G06F3/041
技術(shù)領(lǐng)域
resonance,frequency,spring,mass,mechanical,in,system,operating,or,be
地域： Lippstadt

摘要

The operating unit for a vehicle is provided with a housing and an operating element elastically mounted in and/or on the housing, wherein the elastically mounted operating element forms a spring-mass system having a construction-related resonance frequency. The operating unit is further provided with an actuator for pulse-shaped mechanical excitation of the operating element, and a control unit for controlling the actuator when manually actuating the operating element. The resonance frequency is, due to construction, above the highest cut-off frequency that can typically still be detected by receptors for haptic feedback and/or for tactile sensation of a person. The frequency spectrum of the mechanical pulse at the resonance frequency and/or at one of the harmonics of the resonance frequency has no frequency components in that the power density spectrum above the cut-off frequency is energy-free or substantially energy-free.

說明書

1 2 3 4 5 6

The present application claims priority of the two national German Patent Applications 10 2019 106 441.4 of Mar. 13, 2019 and 10 2019 109 785.1 of Apr. 12, 2019, the contents of which are hereby incorporated by reference into the subject matter of the present patent application.

The invention relates to an operating unit for a vehicle with oscillation-free haptic feedback.

Systems for haptic feedback typically consist of an actuator that applies a force and a mechanical system on which the force acts. The resulting motion can be sensed by the user.

To allow this motion in the first place, the mechanical system is usually spring-mounted. Mechanical spring-mass systems inevitably have resonance frequencies with which they can oscillate.

There are haptic feedback approaches in which one of these resonance frequencies is deliberately stimulated in order to make the resulting sinusoidal vibration perceptible. The disadvantage of this approach is an impression that is usually described as qualitatively inferior or vague.

Therefore, a pulse-shaped course of path of the mechanical system is preferred (see the solid line in the diagram of FIG. 1).

權(quán)利要求

1
The invention claimed is:1. An operating unit for a vehicle, comprising:a housing,an operating element elastically mounted in or on the housing,wherein the elastically mounted operating element forms a spring-mass system having a construction-related resonance frequency,an actuator for pulse-shaped mechanical excitation of the operating element, the actuator operable to be controlledwhen manually actuating the operating element,wherein the resonance frequency is, due to construction, above the highest cut-off frequency that can typically still be detected by receptors for haptic feedback and/or for tactile sensation of a person, andwherein the frequency spectrum of the mechanical pulse at the resonance frequency excited by the actuator has no frequency components in that the power density spectrum of the mechanical pulse above the cut-off frequency is energy-free or substantially energy-free.2. The operating unit according to claim 1, wherein the cut-off frequency is 300 Hz or 250 Hz or 200 Hz.3. The operating unit according to claim 1, wherein the mass and/or the spring constant of the spring-mass system is/are selected for definition of its resonance frequency according to the following formula: f = 1 2 ? π ? k m ,wherein m describes the mass of the spring-mass system, k describes the spring constant of the spring-mass system and f describes the resonance frequencies.4. The operating unit according to claim 1, wherein the operating unit has a touchpad or a touchscreen with a touch-sensitive surface.5. The operating unit according to claim 1, wherein the operating unit is configured to detect a valid actuation as a function of the actuation pressure or actuation force or the course of the actuation pressure or actuation force.6. The operating unit according to claim 1, wherein the actuator is designed as a tension rod magnet, as a plunger coil drive or as a piezo drive.
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