Back to results
US 6,587,397 B2Granted
Electroacoustic transducer
AssigneeStar Micronics Co., Ltd.
InventorYoshikazu Tsuchikiri
Life of this patent
Estimating the term…
Loading patent…
Loading patent…
AssigneeStar Micronics Co., Ltd.
InventorYoshikazu Tsuchikiri
Estimating the term…
A case 1 is formed of thermoplastic resin, and includes an upper case 11 and a lower case 21. The case 1 accommodates a pole piece 31, a coil 41, a magnet 51, a diaphragm 61, and so on. The pole piece 31 includes an core 32 and a base 33, and placed on the lower case 21. There are integrally formed on an upper face of the lower case 21, a wall 22 for defining a mounting position of the pole piece 31, a projection 23 for preventing a conductive wire 42 drawn our from the coil 41 from getting in touch with the base 33, and a bobbin part 24 for the conductive wire 42 to be wound therearound. A height of the projection 23 is set at an equal or larger value to or than a height of a surface of the base 33, and a contact of the conductive wire 42 with the base 33 can be avoided by the projection 23.
An electroacoustic transducer comprising:
Dependencies are inferred from the claim text.
Drawings are temporarily unavailable. Open the PDF at USPTO
From the US filing history. Foreign family members aren’t listed.
No references of this kind are recorded.
Term ended 13 Dec 2021 (estimated)
1. Field of the Invention
The present invention relates to an electroacoustic transducer which transduces an electric signal to a sound.
2. Description of the Related Art
FIG. 1 is a perspective view showing an external view of an electroacoustic transducer in its entirety according to an embodiment of the invention.
FIG. 2 is a sectional view showing the electroacoustic transducer according to the embodiment of the invention.
FIG. 3 is an exploded perspective view showing a structure of the electroacoustic transducer according to the embodiment of the invention.
An embodiment of the present invention will be described in detail with reference to the accompanying drawings. In the drawings, the same reference numerals will be assigned to the same elements, respectively, and the overlapped descriptions will be omitted.
FIG. 1 is a perspective view showing an external view of an electroacoustic transducer according to an embodiment of the invention. FIG. 2 is a sectional view of the electroacoustic transducer. FIG. 3 is an exploded perspective view showing the structure of the electroacoustic transducer.
An electroacoustic transducer T has a case 1 made of thermoplastic resin. The case 1 includes an upper case 11 and a lower case 21. The upper case 11 and the lower case 12 are joined and fixed to each other by employing ultrasonic welding technique. The upper case 11 has a substantially box-like shape. A lower face of the upper case 11 is opened. The upper case 11 has a sound emitting hole 12 in the upper face thereof and a sound emitting tube 13 extending toward the inside thereof. The uppercase 11 has a stepped portion 14 with which an ultrasonic welding machine is brought into contact. A pole piece 31, coil 41, magnet 51 and diaphragm 61 is accommodated in an internal space defined by the upper case 11 and the lower case 21.