vibration actuator
By optimizing the structural design of the vibration actuator and using a combination of non-magnetic and soft magnetic materials, the problems of miniaturization and insufficient driving force were solved, achieving a stable and durable vibration effect.
CN115702047BActive Publication Date: 2026-07-07FOSTER ELECTRIC CO LTD
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- FOSTER ELECTRIC CO LTD
- Filing Date
- 2020-07-02
- Publication Date
- 2026-07-07
AI Technical Summary
Technical Problem
Existing vibration actuators have difficulty maintaining sufficient driving force during miniaturization and also have installation and durability issues.
Method used
The shell is made of non-magnetic material, and the yoke, magnetic pole pieces and coil structure are made of soft magnetic material. Vibration is generated by electromagnetic drive. Combined with leaf springs to support the movable parts, it is ensured that the movable parts do not exceed the range of the yoke during vibration. The size relationship between the yoke and the magnetic pole pieces is optimized to enhance the driving force.
Benefits of technology
This achieves miniaturization while providing sufficient vibration driving force and improving the durability and stability of the device.
✦ Generated by Eureka AI based on patent content.
Smart Images
Figure CN115702047B_ABST
Abstract
The vibration actuator 1 has a housing-side electromagnetic driving portion 3, a movable member 4, and a pair of leaf springs 5a, 5b that support the movable member 4. The movable member 4 has a magnet 30, a pair of magnetic pole pieces 31a, 31b, and a pair of blocks 32a, 32b. The housing-side electromagnetic driving portion 3 has a pair of coils 21a, 21b and a cylindrical yoke 20 that is disposed radially outward of the pair of coils 21a, 21b, projects further outward in the vibration axis O direction than the pair of coils 21a, 21b, and is made of a soft magnetic material. In the vibration axis O direction, the average length Ly of the yoke O is a length (Lp+2La) or more, where Lp is the length from one end portion to the other end portion of the pair of magnetic pole pieces 31a, 31b, and 2La is the length of one side amplitude La when the movable member 4 vibrates.
Need to check novelty before this filing date? Find Prior Art