Lens hood
The lens hood design addresses the cumbersome attachment issue by using a dual-threaded shaft and movable member system, facilitating easy attachment and detachment while maintaining a compact form factor and preventing loosening.
JP2026099168APending Publication Date: 2026-06-18SIGMA CORP
Patent Information
- Authority / Receiving Office
- JP · JP
- Patent Type
- Applications
- Current Assignee / Owner
- SIGMA CORP
- Filing Date
- 2024-12-06
- Publication Date
- 2026-06-18
AI Technical Summary
Technical Problem
Conventional lens hoods require multiple rotations of an attachment knob for fixation, which is cumbersome, and increasing screw diameter or thread count leads to larger mechanisms or loosening issues.
Method used
A lens hood design with a mounting knob unit featuring a right-hand and left-hand threaded shaft, a guide member, and a movable member with a nut, allowing easy attachment and detachment by reducing the number of knob rotations through combined thread movements.
Benefits of technology
Enables easy attachment and detachment of the lens hood to a lens barrel with reduced rotations, maintaining a compact size and preventing loosening, thus improving usability.
✦ Generated by Eureka AI based on patent content.
Smart Images
Figure 2026099168000001_ABST
Abstract
The objective is to provide a lens hood that can be easily attached and detached, in a lens hood that can be fixed to the lens barrel by rotating the mounting knob. [Solution] The lens hood comprises a hood body and a mounting knob unit, the mounting knob unit comprising a knob, a shaft, a guide member, and a movable member including a nut, the knob being positioned on the outer diameter side of the hood body, the shaft having a right-hand threaded portion and a left-hand threaded portion with the knob fixed to its end, the guide member being fixed to the hood body, the movable member protruding on the inner diameter side of the hood body, the right-hand threaded portion of the shaft being configured on the knob side of the mounting knob unit, the left-hand threaded portion of the shaft being configured on the movable member side of the mounting knob unit, the guide member being attached to the right-hand threaded portion, and the nut being attached to the left-hand threaded portion.
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