Transmission housing for a hand-held soft-air firearm
The gearbox housing design simplifies spring replacement in airsoft guns by using a perpendicular spring holder and positive-locking connections, addressing the complexity and cost issues of existing systems.
WO2026125048A1PCT designated stage Publication Date: 2026-06-18NJ AEROTECHNOLOGIES UG
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Patent Information
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- NJ AEROTECHNOLOGIES UG
- Filing Date
- 2025-12-01
- Publication Date
- 2026-06-18
AI Technical Summary
Technical Problem
Existing gearbox housings for airsoft guns require complex and time-consuming spring replacement processes due to the need to remove attachments and use tools, making them costly and inefficient.
Method used
A gearbox housing design with a spring holder arranged perpendicular to the longitudinal axis of the spring, allowing for tool-free and simplified spring replacement through positive-locking connections, ensuring easy and safe assembly and disassembly.
Benefits of technology
Enables quick, safe, and cost-effective spring replacement without the need for additional tools, simplifying the process and reducing the risk of damage or injury.
✦ Generated by Eureka AI based on patent content.
Smart Images

Figure EP2025084928_18062026_PF_FP_ABST
Abstract
The invention relates to a transmission housing (2) for a hand-held soft-air firearm (4), wherein the transmission housing (2) comprises a spring holder (6), a housing (8) and a spring (10), wherein the spring (10) is provided in the housing (8), wherein the housing (8) has an opening (12), wherein the spring holder (6) is provided at least partially in the opening (12) and wherein the opening (12) is provided at a distance from the longitudinal axis (L) of the spring (10).
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