Large buzzing sheet

By introducing a covered metal frame structure and a bolted connection based on the lever principle into the buzzer, the problem of glue detachment during vibration of the buzzer is solved, resulting in a more stable connection and a longer service life.

CN224232349UActive Publication Date: 2026-05-12GUANGDONG GUANGDA ELECTRONIC TECHNOLOGY CO LTD
0 Cites 0 Cited by

Patent Information

Application Number
CN202520808539.3
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2025-04-27
Publication Date
2026-05-12
Estimated Expiration
2035-04-27

AI Technical Summary

Technical Problem

In existing buzzer chips, the metal substrate and piezoelectric ceramic sheet are bonded together with conductive adhesive. After prolonged use, the adhesive is prone to detachment, leading to separation.

Method used

The design employs a wrap-around approach with left and right side panels, a back panel, and a front panel, completely encasing the piezoelectric ceramic sheet within a metal frame. This design combines the lever principle of the swing arm and connecting plate, threaded connections, a limiting frame, and plug-in plates to replace single-adhesive bonding. It disperses vibration and shear forces and compensates for the attenuation of adhesive strength caused by adhesive aging through bolt preload.

Benefits of technology

It extends service life, avoids stress concentration, ensures the relative positional stability of the ceramic sheet and the substrate during vibration, reduces the risk of delamination, and improves the stability and reliability of the connection.

✦ Generated by Eureka AI based on patent content.
Patent Text Reader

Abstract

The large buzzing sheet comprises a metal substrate and a piezoelectric ceramic sheet arranged on the front surface of the metal substrate, the left side and the right side of the metal substrate are respectively provided with a side wing plate, the back surface of each side wing plate is fixedly connected with a back plate, and one side, far away from each side wing plate, of each back plate extends to the back surface of the metal substrate. The front of the side wing plate is fixedly connected with a front plate, the side, away from the side wing plate, of the front plate extends to the front of the piezoelectric ceramic piece, the top of the side wing plate is provided with a connecting plate, the front and back of the connecting plate are in swing connection with swing rods, and the sides, away from the connecting plate, of the swing rods extend to the outer side of the side wing plate and are fixedly connected with the side wing plate. Through the wrapping design of the left and right side wing plates, the back plate and the front plate, the piezoelectric ceramic piece is completely wrapped in the metal frame, a plane fixing mode of single glue bonding is replaced, the frame structure disperses shear force generated by vibration to the whole side wing plate system, stress is prevented from being concentrated on a glue bonding surface, and the service life is prolonged.
Need to check novelty before this filing date? Find Prior Art