Electro-mechanical and acoustic transducer for portable terminal unit
First Claim
Patent Images
1. An electro-mechanical and acoustic transducer comprising:
- a diaphragm;
a magnetic circuit unit forming a magnetic path having a magnetic gap therein and disposed so as to be operably opposed to diaphragm;
a weight which is provided integral with or separated from said magnetic circuit unit and does not form a substantial part of said magnetic path;
said magnetic circuit unit and said weight constituting a moving unit;
at least one suspension for holding said moving unit;
a holding member for operably holding said diaphragm and said suspension; and
a driving unit for generating an electromagnetic driving force to interactively operate between said diaphragm and said magnetic circuit unit.
1 Assignment
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Accused Products
Abstract
The present invention purposes to realize an electro-mechanical and acoustic transducer capable of generating both strong vibration and sound. In an electro-mechanical and acoustic transducer of the present invention, mass of a mechanical vibration system of the electro-mechanical and acoustic transducer is increased by attaching a weight to a magnetic circuit unit or integrated the weight with the magnetic circuit unit, whereby large vibration is obtained from the electro-mechanical and acoustic transducer.
160 Citations
76 Claims
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1. An electro-mechanical and acoustic transducer comprising:
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a diaphragm;
a magnetic circuit unit forming a magnetic path having a magnetic gap therein and disposed so as to be operably opposed to diaphragm;
a weight which is provided integral with or separated from said magnetic circuit unit and does not form a substantial part of said magnetic path;
said magnetic circuit unit and said weight constituting a moving unit;
at least one suspension for holding said moving unit;
a holding member for operably holding said diaphragm and said suspension; and
a driving unit for generating an electromagnetic driving force to interactively operate between said diaphragm and said magnetic circuit unit. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 73)
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11. An electro-mechanical and acoustic transducer comprising:
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a diaphragm;
a magnetic circuit unit forming a magnetic path having a magnetic gap therein, constituting a moving unit and disposed opposing to said diaphragm;
at least two suspensions for holding said moving unit;
a first suspension of said at least two suspensions having a pair of fixing portions and fixed therewith to the diaphragm side of said magnetic circuit unit;
a second suspension of said at least two suspensions having another pair of fixing portions and fixed therewith to opposite diaphragm side of said magnetic unit, so that fixing portions of said first suspension are fixed on receiving seats in each other different positions in diagonal direction relation from fixing portions of said second suspension on a plan view seen from a direction of a normal line to the diaphragm;
a holding member for holding said diaphragm and said suspensions, said holding member having two openings and four receiving seats, said four receiving seats receiving to fix said fixing portions of said first and second suspensions;
a voice coil fixed to said diaphragm and operably inserted in aid magnetic gap for generating an electromagnetic driving force to interactively operate between said diaphragm and said magnetic circuit unit; and
a baffle disposed at one of said openings. - View Dependent Claims (12, 13, 18, 19, 20)
arm portions each being connected to said fixing portion, shaped for substantially extending along external shape of said magnetic circuit unit and having resilience; and
holding portions each being connected to said arm portions and holding said magnetic circuit unit.
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13. An electro-mechanical and acoustic transducer according to claim 11, wherein said magnetic circuit unit has a circular periphery and said suspensions have an arcing arm portion.
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18. An electro-mechanical and acoustic transducer according to claim 12, wherein said magnetic circuit unit has a shape substantially coinciding with a shape when said suspensions is at a maximum permissible amplitude of said magnetic circuit unit.
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19. An electro-mechanical and acoustic transducer according to claim 11, wherein said holding member has a rectangular shape, said receiving portions in a diagonal positional relationship are rectangular and have the same height and said receiving portions in each other adjacent positional relationship have different heights.
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20. An electro-mechanical and acoustic transducer according to claim 11, wherein a distance between the periphery of said magnetic circuit unit and said baffle or said holding member is smaller than a distance between said voice coil and said magnetic circuit unit.
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14. An electro-mechanical and acoustic transducer comprising:
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a diaphragm;
a magnetic circuit unit forming a magnetic path having a magnetic gap therein and disposed so as to be operably opposed to said diaphragm;
a moving unit constituted by said magnetic circuit unit;
a holding member for operably holding said diaphragm;
at least one suspension including at least two arms for suspending said moving unit, each of said arms having a thin plate shape in which a central portion is smaller in width than end portions to be fixed to said moving unit and said holding member; and
a driving unit for generating an electromagnetic driving force to interactively operate between said diaphragm and said magnetic circuit unit. - View Dependent Claims (15, 16, 17, 74)
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21. An electro-mechanical and acoustic transducer unit comprising:
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an electro-mechanical and acoustic transducer;
including;
a diaphragm;
a magnetic circuit unit forming a magnetic path having a magnetic gap therein and disposed so as to be operably opposed to said diaphragm;
a weight which is provided integral with or separated from said magnetic circuit unit and does not form a substantial part of said magnetic path;
said magnetic circuit unit and said weight constituting a moving unit;
at least one suspension for holding said moving unit;
a holding member for operably holding said diaphragm and said suspension; and
a driving unit for generating an electromagnetic driving force to interactively operate between said diaphragm and said magnetic circuit unit;
an electric signal generator for outputting to said electro-mechanical and acoustic transducer at least two electric signals having a different frequency or frequency range; and
a switch for switching the at least two electric signals to said electro-mechanical and acoustic transducer. - View Dependent Claims (22, 23, 24, 25, 26, 27, 28, 29, 30, 47, 52)
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31. An electro-mechanical and acoustic transducer, comprising:
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an electro-mechanical and acoustic transducer including;
a diaphragm;
a magnetic circuit unit forming a magnetic path having a magnetic gap therein and disposed so as to be operably opposed to said diaphragm;
a weight which is provided integral with or separated from said magnetic circuit unit and does not form a substantial part of said magnetic path;
said magnetic circuit unit and said weight constituting a moving unit;
at least one suspension for holding said moving unit;
a holding member for operably holding said diaphragm and said suspension; and
a driving unit for generating an electromagnetic driving force to interactively operate between said diaphragm and said magnetic circuit unit;
a detector for detecting a resonance frequency of said electro-mechanical and acoustic transducer; and
an electric signal generator for outputting to said electro-mechanical and acoustic transducer an electric signal having said resonance frequency detected by said detector. - View Dependent Claims (48)
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32. An electro-mechanical and acoustic transducer unit comprising:
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an electro-mechanical and acoustic transducer including;
a diaphragm;
a magnetic circuit unit forming a magnetic path having a magnetic gap therein and disposed so as to be operably opposed to said diaphragm;
a weight which is provided integral with or separated from said magnetic circuit unit and does not form a substantial part of said magnetic path;
said magnetic circuit unit and said weight constituting a moving unit;
at least one suspension for holding said moving unit;
a holding member for operably holding said diaphragm and said suspension; and
a driving unit for generating an electromagnetic driving force to interactively operate between said diaphragm and said magnetic circuit unit;
an electric signal generator for outputting an electric signal including a resonance frequency of said electro-mechanical and acoustic transducer;
a detector for detecting a signal at a resonance frequency of said electro-mechanical and acoustic transducer; and
an amplifier for amplifying an input signal from said detector and outputting an amplified signal to said electro-mechanical and acoustic transducer. - View Dependent Claims (33, 34, 35, 36, 49)
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37. An electro-mechanical and acoustic transducer unit comprising:
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an electro-mechanical and acoustic transducer including;
a diaphragm;
a magnetic circuit unit forming a magnetic path having a magnetic gap therein and disposed so as to operably opposed to said diaphragm;
a weight which is provided integral with or separated from said magnetic circuit unit and does not form a substantial part of said magnetic path;
said magnetic circuit unit and said weight constituting a moving unit;
at least one suspension for holding said moving unit;
a holding member for operably holding said diaphragm and said suspension; and
a driving unit for generating an electromagnetic driving force to interactively operate between said diaphragm and said magnetic circuit unit;
a detector for detecting a signal at a resonance frequency of said electro-mechanical and acoustic transducer; and
an amplifier for amplifying a noise and an input signal from said detector and outputting an amplified signal to said electro-mechanical and acoustic transducer. - View Dependent Claims (38, 39, 40, 41, 50)
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42. An electro-mechanical and acoustic transducer unit comprising:
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an electro-mechanical and acoustic transducer including;
a diaphragm;
a magnetic circuit unit forming a magnetic path having a magnetic gap therein and disposed so as to be operably opposed to said diaphragm;
a weight which is provided integral with or separated from said magnetic circuit unit and does not form a substantial part of said magnetic path;
said magnetic circuit unit and said weight constituting a moving unit;
at least one suspension for holding said moving unit;
a holding member for operably holding said diaphragm and said suspension; and
a driving unit for generating an electromagnetic driving force to interactively operate between said diaphragm and said magnetic circuit unit;
an antenna for receiving incoming signals;
a receiving signal processing unit for processing said incoming signals and generating an output signal;
a detector for detecting a signal of a resonance frequency of said electro-mechanical and acoustic transducer; and
an amplifier for amplifying a noise and a signal portion of an inputted signal from said detector during the while the output signal from said receiving signal processing unit is given thereto and for outputting an amplified signal to said electro-mechanical and acoustic transducer. - View Dependent Claims (43, 44, 45, 46, 51)
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53. An electro-mechanical and acoustic transducer comprising:
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a diaphragm;
a magnetic circuit unit forming a magnetic path having a magnetic gap therein and disposed so as to be operably opposed to said diaphragm;
a weight which is provided integral with said magnetic circuit unit and does not form a substantial part of said magnetic path;
said magnetic circuit unit and said weight constituting a moving unit;
at least one suspension for suspending said moving unit;
a holding member for operably holding said diaphragm and said suspension; and
a driving unit for generating an electromagnetic driving force to interactively operate between said diaphragm and said magnetic circuit unit. - View Dependent Claims (54, 55, 56, 57, 58, 59, 60, 61, 62, 75)
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63. An electro-mechanical and acoustic transducer comprising:
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a diaphragm;
a magnetic circuit unit forming a magnetic path having a magnetic gap therein and disposed so as to be operably opposed to said diaphragm;
a weight which is separated from but mechanically firmly fixed to said magnetic circuit unit and does not form a substantial part of said magnetic path;
said magnetic circuit unit and said weight constituting a moving unit;
at least one suspension for suspending said moving unit;
a holding member for operably holding said diaphragm and said suspension; and
a driving unit for generating an electromagnetic driving force to interactively operate between said diaphragm and said magnetic circuit unit. - View Dependent Claims (64, 65, 66, 67, 68, 69, 70, 71, 72, 76)
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Specification