Arm-type assist device

The arm-type assistive device addresses unintended operations by using a memory unit and control system to stabilize actuator pressure based on validated signals, improving safety and reliability.

JP2025168856APending Publication Date: 2025-11-12CKD CORP
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Patent Information

Application Number
JP2024073670
Authority / Receiving Office
JP · JP
Patent Type
Applications
Current Assignee / Owner
Filing Date
2024-04-30
Publication Date
2025-11-12

AI Technical Summary

Technical Problem

Existing arm-type assistive devices may perform unintended operations due to wire breaks or abnormalities in the load detection system, leading to incorrect balance pressure calculations and potential safety hazards.

Method used

The arm-type assistive device incorporates a memory unit to store balance pressure signals, a switch unit to control signal output based on detected load, and a control unit to manage the switch between states, ensuring that only validated balance pressure signals are applied to actuators, with features like moving average calculations to stabilize operations.

Benefits of technology

This design prevents unintended actions by stabilizing actuator operations, enhancing safety and reliability by ensuring accurate balance pressure application even in the presence of load abnormalities.

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Abstract

To provide an arm-type assist device capable of suppressing the occurrence of unintended movements.SOLUTION: An arm-type assist device has an arm, a load detection device 13, and a calculation unit 17. The arm is controlled by a first actuator 26 and a second actuator 33. The calculation unit 17 has a first memory unit 71, a second memory unit 72, a switch unit 73, and a control unit 74. The first memory unit 71 and the second memory unit 72 each store a balance pressure signal related to the balance pressure. The switch unit 73 is switchable between a first state R1 and a second state R2. In the first state R1, the calculation unit 17 outputs a balance pressure signal from each of the first memory unit 71 and the second memory unit 72. In the second state R2, the calculation unit 17 does not output a balance pressure signal from each of the first memory unit 71 and the second memory unit 72. The control unit 74 switches the switch unit 73 from the first state R1 to the second state R2 according to the detected load V1.SELECTED DRAWING: Figure 2
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