Electric-to-mechanical-to-acoustic converter and portable terminal unit
A technology of converting devices and converters, which is applied to current supply devices, loudspeakers, electrical components, etc., and can solve problems such as calls, magnets that are not too heavy, and difficult to use
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Embodiment 1
[0068] Use below figure 1 and figure 2 The electro-mechanical-acoustic transducer of the first embodiment will be described. figure 1 is a top view of the electro-mechanical-acoustic converter, figure 2 is along figure 1 Sectional view of the line II-II' of the electro-mechanical-acoustic converter.
[0069] The electro-mechanical-acoustic converter is constructed as follows.
[0070] The vibrating membrane 1 is mounted on an annular support member 2 made of plastic along its outer periphery. The vibrating membrane 1 is made of titanium or polycarbonate material, and is a thin film with a thickness of 10 μm to 50 μm. The support member 2 is preferably made of glass fiber reinforced plastic with strong impact resistance.
[0071] The yoke 3 is a ferromagnetic material such as soft iron, and has a short cylindrical outer peripheral portion and a bottom portion. The magnet 4 is a permanent magnet such as ferrite or neodymium, which is disc-shaped and fixed on the bottom ...
Embodiment 2
[0082] Use below image 3 and Figure 4 The electro-mechanical-acoustic transducer of the second embodiment will be described. in image 3 is a top view of the electro-mechanical-acoustic converter, Figure 4 is along image 3 Sectional view of line IV-IV' of electro-mechanical-acoustic converter.
[0083] The electro-mechanical-acoustic converter is constructed as follows. The vibrating membrane 20 is attached to a supporting member 21 made of plastic along the outer periphery. Here, the vibrating membrane 20 is a plate made of a high magnetic permeability material such as permalloy having a thickness of about 0.1 mm to 0.2 mm. The support member 21 is preferably made of glass fiber reinforced material with strong impact resistance.
[0084] The plate pole 22 is a ferromagnetic material, is provided at a position facing the vibrating membrane 20, and has a shape having a central pole 22' in the center. The magnet 23 is a permanent magnet such as ferrite or neodymium, ...
Embodiment 3
[0098] Use below Figure 5 , Figure 6 and Figure 7 The electro-mechanical-acoustic transducer of the third embodiment will be described. in Figure 5 is a top view of the electro-mechanical-acoustic converter, Figure 6 It is the edge of the casing with the portable terminal device Figure 5 Sectional view of the line VI-VI' of the electro-mechanical-acoustic converter, Figure 7 It is to illustrate the relationship between the size of the yoke and the magnet.
[0099] Regarding the structure of the electro-mechanical-acoustic transducer, only the differences from the electro-mechanical-acoustic transducer of the first embodiment will be described. All parts that are the same as those in the first embodiment are indicated by the same symbols and their descriptions are omitted.
[0100] In the first embodiment, the yoke 3 and the weight 6 constitute an electro-mechanical-acoustic transducer as separate parts. On the other hand, in the third embodiment, the yoke 31 is ...
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