Speaker unit for earphone

A speaker unit for an earphone, comprising:

• a magnet;
• an upper plate fixed to a top surface of the magnet;
• a voice coil disposed to surround outer circumferences of the magnet and the upper plate;
• a vibration plate disposed above the upper plate and to which the voice coil is fixed;
• a fixing ring on which an edge of the vibration plate is mounted;
• and
• a frame having an open top and configured to accommodate the magnet, the upper plate, and the voice coil,
• wherein a pipe conduit is formed in the frame along a circumferential direction,
• wherein a first hole configured to allow the pipe conduit and a first space disposed in front of the speaker unit to communicate with each other is formed in at least one first position at a top of the frame in a circumferential direction, and
• wherein a second hole configured to allow the pipe conduit and a second space disposed in the rear of the speaker unit to communicate with each other is formed in at least one second position at a bottom of the frame in a circumferential direction,
• wherein the frame comprises a mounting portion formed along a circumferential direction to allow a part of an inside of a bottom surface of the fixing ring and a groove formed to be close to the mounting portion along a circumferential direction such that the pipe conduit is formed along the circumferential direction by the groove and a part of an outside of the bottom surface of the fixing ring, and
• wherein a protruding portion protruding from an outer circumference of the frame in a radial direction is formed, and the first hole is formed above the protruding portion.

A speaker unit for an earphone, comprising:

• a magnet;
• an upper plate fixed to a top surface of the magnet;
• a voice coil disposed to surround outer circumferences of the magnet and the upper plate;
• a vibration plate disposed above the upper plate and to which the voice coil is fixed;
• a fixing ring on which an edge of the vibration plate is mounted;
• and
• a frame having an open top and configured to accommodate the magnet, the upper plate, and the voice coil,
• wherein a pipe conduit is formed in the frame along a circumferential direction,
• wherein a first hole configured to allow the pipe conduit and a first space disposed in front of the speaker unit to communicate with each other is formed in at least one first position at a top of the frame in a circumferential direction,
• wherein a second hole configured to allow the pipe conduit and a second space disposed in the rear of the speaker unit to communicate with each other is formed in at least one second position at a bottom of the frame in a circumferential direction, and
• wherein a third hole configured to allow an internal space of the speaker unit and the second space to communicate with each other is formed in at least one third position at the bottom of the frame in a circumferential direction.

A speaker unit for an earphone, comprising:

• a magnet;
• an upper plate fixed to a top surface of the magnet;
• a voice coil disposed to surround outer circumferences of the magnet and the upper plate;
• a vibration plate disposed above the upper plate and to which the voice coil is fixed;
• a fixing ring on which an edge of the vibration plate is mounted;
• and
• a frame having an open top and configured to accommodate the magnet, the upper plate, and the voice coil,
• wherein a pipe conduit is formed in the frame along a circumferential direction,
• wherein a first hole configured to allow the pipe conduit and a first space disposed in front of the speaker unit to communicate with each other is formed in at least one first position at a top of the frame in a circumferential direction,
• wherein a second hole configured to allow the pipe conduit and a second space disposed in the rear of the speaker unit to communicate with each other is formed in at least one second position at a bottom of the frame in a circumferential direction,
• wherein the frame has a shape with an open bottom,
• the speaker unit further comprising a lower plate fixed to a bottom surface of the magnet and configured to cover the bottom of the frame, and
• wherein a fourth hole and at least one fifth hole, which allow an internal space of the speaker unit and the second space to communicate with each other, are formed in a center and a part outside the center of the lower plate, respectively.

A speaker unit for an earphone, comprising:

• a magnet;
• an upper plate fixed to a top surface of the magnet;
• a voice coil disposed to surround outer circumferences of the magnet and the upper plate;
• a vibration plate disposed above the upper plate and to which the voice coil is fixed;
• a fixing ring on which an edge of the vibration plate is mounted;
• a frame having an open top and configured to accommodate the magnet, the upper plate, and the voice coil;
• and
• a support portion which is formed of a metal material and coupled with the frame, provides an inner surface outside the groove, and surrounds and supports an outer circumference of the fixing ring along a circumferential direction,
• wherein a pipe conduit is formed in the frame along a circumferential direction,
• wherein a first hole configured to allow the pipe conduit and a first space disposed in front of the speaker unit to communicate with each other is formed in at least one first position at a top of the frame in a circumferential direction, and
• wherein a second hole configured to allow the pipe conduit and a second space disposed in the rear of the speaker unit to communicate with each other is formed in at least one second position at a bottom of the frame in a circumferential direction, and
• wherein the frame comprises a mounting portion formed along a circumferential direction to allow a part of an inside of a bottom surface of the fixing ring and a groove formed to be close to the mounting portion along a circumferential direction such that the pipe conduit is formed along the circumferential direction by the groove and a part of an outside of the bottom surface of the fixing ring.