JPH0511693U - Speaker damper - Google Patents

Abstract

(57) [Summary] [Structure] In an electrodynamic speaker, a damper is formed by laminating a thermoplastic resin film with a woven fabric made of cotton or polyamide yarn impregnated with a thermosetting resin and / or a blended yarn of these. It is characterized by being airtight and waterproof. [Effect] By laminating and combining the cloth and the thermoplastic film, it is possible to easily and inexpensively obtain the airtight and waterproof speaker damper.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

  The present invention relates to a speaker damper that is airtight and waterproof.

[0002]

[Prior art]

  In recent years, the demand for speakers to be used outdoors has increased, and a waterproof switch intended for outdoor use is being used. Some speakers have been proposed, but an electrodynamic speaker is used in terms of performance such as sound quality efficiency. Is generally waterproof. Electrodynamic loudspeaker moves in a very narrow magnetic gap The structure with the coil installed ensures normal operation when water enters the magnetic gap. Since it is not possible to obtain a working structure, it is best to make the magnetic circuit a closed structure for an electrodynamic waterproof speaker. It is general. However, to make the magnetic circuit a closed structure, it is necessary to use a voice coil finger-holding member. It is necessary to make the damper that is airtight and waterproof, and the conventional plastic film Molded into a damper shape or made into cotton or polyamide yarn impregnated with phenol resin, etc. It is used as a damper by applying latex etc. to the surface of the thermoformed product ing.

[0003]

[Problems to be solved by the device]

The damper formed by molding the above plastic film has a high stiffness, so that the mechanical Q _{0 of the} speaker becomes high and an acoustically suitable speaker cannot be obtained, and the stiffness of the plastic film is lowered so as to obtain a suitable Q ₀ as a speaker. If this is done, the rigidity of the damper is also lowered, and there is a drawback in that it cannot function as a damper that properly supports the voice coil position. On the other hand, a damper obtained by coating a woven fabric molded article with an airtight and waterproofing agent such as latex has a drawback that the manufacturing process is very complicated, and a damper of a constant quality cannot be obtained at a low cost.

[0004]

[Means for Solving the Problems]

  The speaker damper of the present invention is made of cotton, polyamid impregnated with thermosetting resin. The product of a woven fabric made of yarn and / or a mixed yarn of these and a thermoplastic resin film It is characterized by being composed of layers and having airtightness and waterproofness.

[0005]

[Action]

The speaker damper according to the present invention has a laminated structure of a woven cloth and a thermoplastic resin film, so that the rigidity can be ensured by the woven cloth part, so that the film can be made very thin, and the film part is airtight. Since the waterproof property is ensured, it is possible to obtain the airtight and waterproof damper without increasing the mechanical Q ₀ value of the speaker. Also, the setting of the minimum resonance frequency (fo), which is an important factor of speaker performance, can be adjusted by the thickness of the woven fabric thread, the number of threads, the concentration of the impregnated resin, etc., as in the conventional general damper. .

[0006]

【Example】

  # 40 cotton impregnated with phenol resin and polyamide fiber, thickness 0.03mm Nylon film is laminated and heat-pressed to form an airtight and waterproof damper. Obtained. In FIG. 1, the damper 1 includes a woven fabric layer 2 and a thermoplastic resin film layer 3. Composed.

[0007]   The damper 1 obtained in this embodiment is sufficient for supporting the proper position of the voice coil. It has sufficient rigidity and suitable compliance as a speaker damper.

[0008]

[Effect of device]

  As described above, according to the present invention, a cloth and a thermoplastic film are laminated and laminated. The speaker damper that is airtight and waterproof easily and cheaply by combining Can be obtained.

[Brief description of drawings]

FIG. 1 is a partial side sectional view showing an example of a speaker damper according to the present invention.

[Explanation of symbols]

2 woven layer 3 Thermoplastic resin film layer

Claims (2)

[Scope of utility model registration request] 1. An electrodynamic speaker having a magnetic circuit, a voice coil held in the magnetic circuit, and a damper for supporting the voice coil, wherein the damper is cotton, polyamide yarn and / or impregnated with a thermosetting resin. A speaker damper characterized in that it is made of a laminate of a woven fabric made of these mixed yarns and a thermoplastic resin film and has airtightness and waterproofness. 2. The damper is laminated by simultaneously thermoforming a woven fabric made of cotton, polyamide yarn and / or a blended yarn of these impregnated with a thermosetting resin, and a thermoplastic resin film. The speaker damper according to claim 1, which is characterized in that.