Joystick

The joystick's dual redundant return mechanisms with distinct elastically deformable assemblies and isolation partition prevent common-mode failures, ensuring reliable and precise operation by minimizing friction and wear, addressing the vulnerability of existing designs.

WO2026130855A1PCT designated stage Publication Date: 2026-06-25CROUZET SA
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Patent Information

Authority / Receiving Office
WO · WO
Patent Type
Applications
Current Assignee / Owner
CROUZET SA
Filing Date
2025-11-06
Publication Date
2026-06-25

AI Technical Summary

Technical Problem

Existing joysticks with redundant return mechanisms are susceptible to common-mode failures due to identical springs bearing against opposite faces of the same edge, leading to simultaneous failure and increased wear, which can compromise the joystick's functionality.

Method used

The joystick incorporates two redundant return mechanisms with distinct elastically deformable assemblies and contact faces that minimize friction and provide independent operation, ensuring one mechanism can return the joystick to neutral position even if the other fails, and includes a partition to isolate these mechanisms and reduce interference.

Benefits of technology

This design prevents common-mode failures and reduces wear on the joint, maintaining joystick functionality by ensuring independent operation of the return mechanisms and minimizing friction, thereby enhancing reliability and precision.

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    Figure EP2025082112_25062026_PF_FP_ABST
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Abstract

The invention relates to a joystick having first and second redundant return mechanisms (110, 112). The first return mechanism comprises a first elastically deformable assembly (120) inserted between a first base (126) rigidly connected to a stationary frame (6) and a first rim (40) rigidly connected to the stick. The second return mechanism (112) comprises: - a contact face rigidly connected to the stationary frame; - a shuttle (132) free to slide along the stick, this shuttle comprising, on one side, a pad (142) bearing on the contact face and, on the opposite side, a second base; and - a second elastically deformable assembly (130) inserted between the second base and a second rim (70) rigidly connected to the stick such that the second elastically deformable assembly continuously urges the pad against the contact face.
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