Created on 04.01.2012 22:10.
Updated 02.25.2020 22:36.
Author: S.P. Serezhnikov.
A movable speaker system containing a diffuser with a centering band and a voice coil frame mounted on it by means of glue, characterized in that the frame is additionally sewn to the centering band with a synthetic thread impregnated with glue.
The utility model relates to the field of radio engineering and can be used in the design of dynamic loudspeakers.
Known dynamic loudspeakers (see A. c. USSR No. 329681, MKI N 04 R 9/06, 1972 prototype), containing in the moving system a diffuser with a centering collar and mounted on it by means of glue frame of the voice coil.
The disadvantage of this simple and technological design is the rapid destruction of the adhesive joint in the case of its use in high-powered acoustic systems installed on the patrol cars of the Ministry of Internal Affairs and the State Traffic Safety Inspectorate.
The problem to be solved by the utility model is to increase the strength and durability of the adhesive bond between the voice coil frame and the diaphragm.
The technical result of the utility model is to reduce stresses in the adhesive layer.
This task is achieved by the fact that the movable system of the dynamic loudspeaker contains a diffuser with a centering band and a voice coil frame mounted on it by means of glue, while the frame is additionally sewn to the centering band with a synthetic thread impregnated with glue.
The drawings show a moving speaker system:
in FIG. 1 shows a cross-sectional view of a speaker cone with a voice coil bobbin;
in FIG. 2 is a plan of this connection.
in FIG. 3 – coil mounting unit.
The device contains a diffuser 1 with a centering band 2, on which, using an adhesive layer 3, a frame 4 of a voice coil 5 with leads 6 is installed. With a thread 7, a simple seam of the frame is sewn to the centering band 2. Layers of glue 8 are applied to the seam on both sides.
Additional fastening of the voice coil frame to the centering band of the diffuser allows reinforcing the adhesive joint with a synthetic thread and relieving the adhesive layer from alternating audio frequency voltages.
Thus, these stresses are perceived by the thread hardened after soaking with glue, and the layers of glue only fix the thread and protect it from external influences.
This separation of functions contributes to high reliability and durability of the connection, which is confirmed in practice.
Source: patent 2001112626 dated April 17, 2001, H04R 9/06