Sensorized Punching Bag Projection for Immersive Fitness Feedback

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Solution Overview

Problem

Fitness activities relying on digital technologies lack the resistance and equipment feel of traditional workouts, and digital fitness tools often provide limited immersion and do not utilize actual equipment, precluding an immersive experience for users.

Innovation Solution

A system and method that uses a non-planar punching bag with integrated sensors and an image projecting device to provide a dynamic and interactive fitness experience, allowing users to physically interact with a life-size coach or content projected on the bag, receive personalized feedback, and track exercise performance metrics.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If digital fitness technologies are used, then accessibility and convenience are improved, but immersion and equipment feel deteriorate

Engineering Contradiction:
ImproveaccessibilityVSAvoidimmersion
Core Design Contradiction:
Ease of operationVSReliability

Solution Approach 1:

The patent merges digital technology with physical equipment by integrating sensors, projectors, and computing units into a punching bag system. This combination allows users to experience both the convenience of digital tracking and the immersion of physical equipment, resolving the contradiction between accessibility and immersion.

Inventive Principle:
Principle #5Merging (Combining)

Solution Approach 2:

The system uses an image projecting device as an intermediary between the digital system and the user. The projector displays dynamic content on the punching bag surface, creating a bridge that enhances immersion while maintaining digital accessibility and convenience.

Inventive Principle:
Principle #24Intermediary (Mediator)

2Force

If traditional fitness equipment is used, then resistance and equipment feel are improved, but interactivity and personalized feedback deteriorate

Engineering Contradiction:
ImproveresistanceVSAvoidinteractivity
Core Design Contradiction:
ForceVSAdaptability or versatility

Solution Approach 1:

The system implements real-time feedback through sensors that detect user strikes and a computing unit that processes this data. The system provides personalized feedback by analyzing strike force, position, and patterns, then delivering customized guidance through the projected interface, thereby enhancing interactivity while maintaining physical resistance.

Inventive Principle:
Principle #23Feedback

Solution Approach 2:

The punching bag system transitions from a static traditional equipment to a dynamic interactive system. The projected content changes in real-time based on user performance, and the system adapts resistance and feedback based on detected strike patterns, making the equipment as adaptable as digital systems while maintaining physical presence.

Inventive Principle:
Principle #15Dynamics

3Loss of information

If digital screens are used for fitness content, then information delivery is improved, but immersion and physical interaction deteriorate

Engineering Contradiction:
Improveinformation deliveryVSAvoidphysical interaction
Core Design Contradiction:
Loss of informationVSReliability

Solution Approach 1:

The system moves the display from a traditional 2D screen to a 3D surface (the punching bag itself). By projecting content directly onto the equipment the user is physically interacting with, the system eliminates the separation between information delivery and physical interaction, allowing users to see feedback in the same spatial dimension as their movements.

Inventive Principle:
Principle #17Another dimension (Dimensionality change)

Data Source

PatentEP4426449B1System and method for providing a fitness experience to a user
Publication Date: 2025.12.24 BOXCO SAS
  • EP4426449B1 patent drawingFigure 1
  • EP4426449B1 patent drawingFigure 2A~2B
  • EP4426449B1 patent drawingFigure 3

AI summary

Methods and systems for providing a fitness experience to a user. The system comprises a punching bag defining an outer non-planar surface adapted to receive strikes of the user, a sensor configured to generate data about strikes applied by the user on the punching bag, an image projecting device configured to project a dynamic content on the outer non-planar surface of the punching bag and a processor communicably connected to the sensor and the image projecting device. The processor is configured to dynamically adjust the dynamic content projected on the outer non-planar surface based at least in part on data provided by the sensor.