Loudspeaker having a yoke, magnet, cylindrical throat, and spacer plate configuration
First Claim
1. A loudspeaker having a yoke having a center hole, a cylindrical magnet mounted on the yoke, a cylindrical pole piece having an inner shoulder portion and mounted on the magnet, a diaphragm provided above the pole piece, and a cylindrical throat disposed in the magnet, comprising:
- the yoke having a screw thread formed on an inside wall of the center hole;
the pole piece having a screw thread formed on an inside wall of the shoulder portion;
the throat having outer screw threads on an outside wall thereof at an upper portion and a low portion;
both of the outer screw threads being engaged with the screw threads of the yoke and the pole piece, wherein the magnet is secured to the yoke and the pole piece, and wherein the outer screw threads of the low portion of the throat are in screwed engagement only with the inner screw threads of the yoke for securing the throat to the yoke.
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Accused Products
Abstract
A loudspeaker has a yoke having a center hole, a cylindrical magnet mounted on the yoke, a cylindrical pole piece having an inner shoulder portion and mounted on the magnet. A diaphragm is provided above the pole piece, and a cylindrical throat is disposed in the magnet. The yoke has a screw thread formed on an inside wall of the center hole, and the pole piece has a screw thread formed on an inside wall of the shoulder portion. The throat has outer screw threads on an outside wall thereof at an upper portion and a low portion. The outer screw threads are engaged with the screw threads of the yoke and the pole piece. Thus, the magnet is secured to the yoke and the pole piece.
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Citations
7 Claims
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1. A loudspeaker having a yoke having a center hole, a cylindrical magnet mounted on the yoke, a cylindrical pole piece having an inner shoulder portion and mounted on the magnet, a diaphragm provided above the pole piece, and a cylindrical throat disposed in the magnet, comprising:
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the yoke having a screw thread formed on an inside wall of the center hole; the pole piece having a screw thread formed on an inside wall of the shoulder portion; the throat having outer screw threads on an outside wall thereof at an upper portion and a low portion; both of the outer screw threads being engaged with the screw threads of the yoke and the pole piece, wherein the magnet is secured to the yoke and the pole piece, and wherein the outer screw threads of the low portion of the throat are in screwed engagement only with the inner screw threads of the yoke for securing the throat to the yoke.
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2. A loudspeaker having a yoke having a center hole, a cylindrical magnet mounted on the yoke, a cylindrical throat disposed in the magnet and secured to the yoke, a cylindrical pole piece mounted on the magnet, and secured to the throat, a diaphragm provided above the pole piece, an annular plate secured to an upper end of the yoke, said loudspeaker comprising:
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a spacer plate secured to an underside of the annular plate so as to close a gap between an outer periphery of the pole piece and an inner periphery of the annular plate to form a closed space in the yoke; a first sound absorbing material mounted in the closed space; a back cover to cover the diaphragm; a second sound absorbing material mounted in a space within the back cover; and a phasing plug secured to the pole piece at a front side of the diaphragm, the diaphragm being directly connected to a ground through a conductive material. - View Dependent Claims (4, 5, 6, 7)
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3. A loudspeaker having a yoke having a center hole, a cylindrical magnet mounted on the yoke, a cylindrical throat disposed in the magnet and secured to the yoke, a cylindrical pole piece mounted on the magnet, and secured to the throat, a diaphragm provided above the pole piece, an annular plate secured to an upper end of the yoke, said loudspeaker comprising:
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a spacer plate secured to an underside of the annular plate so as to close a gap between an outer periphery of the pole piece and an inner periphery of the annular plate to form a closed space in the yoke; a first sound absorbing material mounted in the closed space; a back cover to cover the diaphragm; a second sound absorbing material mounted in a space within the back cover; and a phasing plug secured to the pole piece at a front side of the diaphragm, the diaphragm being connected to a ground through a conductive material, wherein said back cover includes an opening therein, said opening including a rubber bush and a supply terminal provided in the opening, said bush being configured to prevent an external terminal engaged with the supply terminal from vibrating.
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Specification