[Anakin System Use Case] A product that is easy to use and can be held in hand (vacuum cleaner)

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last updated：Jun 21, 2021

HALデザイン研究所

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What differences are there in the posture and movements of users between products that are easy to hold and use with one hand and those that are not? Let's take a vacuum cleaner as an example.

**Purpose of Evaluation**: This study evaluates the differences in posture, movements, and muscle strain of individuals when using user-friendly vacuum cleaners compared to those that are not user-friendly. **Evaluation Method**: Various types of vacuum cleaners will be used to perform predetermined actions, and subjective and behavioral evaluations will be conducted to assess the factors influencing ease of use. **Target Actions**: - Cleaning debris on flooring - Cleaning debris on carpets - Cleaning gaps - Cleaning corners - Detaching and attaching the head, etc. **Subjective Evaluation**: - Ease of use - Degree of strain on the body (shoulders, sides, back, etc.) - Sense of debris removal **Motion Evaluation using the Anakin System**: - Posture and Movement: The Anakin System will be used to measure posture and movements (tilting and swaying of the torso in left-right and front-back directions) as well as hand movements (matching the vacuum cleaner's movements). - Muscle Strain: Muscle strain in the hands, arms, shoulders, thighs, and torso will be measured. **Evaluation Results**: **Posture and Movement**: There are differences in posture (forward and backward tilt of the body) and the angle between the torso and thighs when using user-friendly vacuum cleaners compared to those that are not. Additionally, there are differences in the speed of hand movements. **Muscle Strain**: There are also differences in muscle strain during cleaning between user-friendly vacuum cleaners and those that are not.

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**Types of Vacuum Cleaners** While we have not evaluated all types, the following types are available: - Robot type - Cyclone type - Paper bag type - Stick type - Handheld type - Canister type - Store and commercial type - Central cleaner **Examples of Measured Muscles** - Long and short radial extensor muscles - Radial flexor muscle - Deltoid (anterior) - Deltoid (posterior) - Erector spinae - Rectus femoris **Target Participants (Monitors)** - 20s (male and female) - 30s (male and female) - 40s (male and female) - 50s (male and female) - 60s (male and female) - 70s **Attributes of Target Participants (Monitors)** - Age - Height - Arm length (left and right) - Grip strength (left and right) - Grip inner diameter (left and right) **Measurement Items in the Anakin System** ■ Coordinates - Thoracic point - Lumbar point - Hip joint point (left and right) - Knee joint point (left and right) ■ Angles and Movements - Trunk tilt - Angle between trunk and thigh (left and right) - Angle between trunk and upper limb (left and right) - Hand movement speed **Camera Placement and Measurement Examples in the Anakin System** Please refer to the attached images to see examples of how hand and shoulder movements differ depending on the vacuum cleaner.