solenoid
The solenoid design with a bobbin and molded resin casing addresses manufacturing cost and waterproofing issues by using axially thickened and thinned portions to ensure complete sealing and efficient resin flow, enhancing durability and performance.
JP2026092849APending Publication Date: 2026-06-08ASTEMO LTD
Patent Information
- Authority / Receiving Office
- JP · JP
- Patent Type
- Applications
- Current Assignee / Owner
- ASTEMO LTD
- Filing Date
- 2024-11-27
- Publication Date
- 2026-06-08
AI Technical Summary
Technical Problem
Existing solenoids for automobile shock absorbers face issues with increased manufacturing costs and poor waterproofing due to the use of O-rings and thermal welding methods, which result in incomplete sealing and temperature-related inconsistencies.
Method used
A solenoid design featuring a bobbin with a cylindrical portion and large-diameter extensions, covered by a molded resin casing with axially thickened and thinned portions to enhance sealing and reduce manufacturing costs, utilizing a joint between the bobbin and casing to prevent water intrusion.
Benefits of technology
The design achieves improved waterproofing and reduces manufacturing costs by ensuring complete sealing and efficient resin flow, maintaining the solenoid's functionality in harsh environments.
✦ Generated by Eureka AI based on patent content.
Smart Images
Figure 2026092849000001_ABST
Abstract
To provide a solenoid that reduces manufacturing costs and improves the waterproofness of the bobbin and mold resin. [Solution] The solenoid 1 of the present invention comprises a bobbin 20 having a cylindrical portion 201 and a large-diameter portion 202 extending radially outward from the axial end of the cylindrical portion 201; a coil 21 wound around the cylindrical portion 201 of the bobbin 20; and a molded resin casing that covers the bobbin 20 and the coil 21 with molded resin and forms a joint portion 25 between them and the large-diameter portion 202. The molded resin casing includes an end covering portion 31 that covers the axial end of the large-diameter portion 202 of the bobbin 20 with molded resin along the radial direction. A portion of the end covering portion 31 is provided with an axially thickened portion 33 that is thicker in the axial direction than other portions of the end covering portion 31.
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