Abstract: A rectangular microspeaker according to the present invention transfers vibration sound through the front surface or side surface of a diaphragm. In order to maximize an effective vibration area and to expand a volume, all parts including a frame are fabricated in a rectangular shape. The present invention is applied to a P type, an F type, and a composite type. The vibration sound generated on the bottom of the diaphragm as well as the vibration sound generated on the top of the diaphragm may be discharged through the side surface. A magnetic field part may be insert-molded separately or along with the frame.

Abstract: A rectangular microspeaker according to the present invention transfers vibration sound through the front surface or side surface of a diaphragm. In order to maximize an effective vibration area and to expand a volume, all parts including a frame are fabricated in a rectangular shape. The present invention is applied to a P type, an F type, and a composite type. The vibration sound generated on the bottom of the diaphragm as well as the vibration sound generated on the top of the diaphragm may be discharged through the side surface. A magnetic field part may be insert-molded separately or along with the frame.

Abstract: The inside of the housing of an acoustic device, such as an earphone, is divided into two or more spaces based on a driver. Diaphragms are disposed to cover a nozzle communicating with an ear of a user and a vent hole formed in the back of the housing. Optimum sound quality can be secured by adjusting the sizes of the spaces formed by the diaphragms and the housing and the locations where the diaphragms are disposed. When the housing is of a sealed type, low-band sound pressure can be effectively prevented from being lost.

Abstract: The present disclosure provides a micro speaker device with a water-proof structure by which water entering a protector is prevented from entering a gap formed between a top face of the protector and a bottom face of an upper plate of an outer casing and a gap formed between a bottom face of the protector and a top face of an outer peripheral portion of a vibration plate. For this end, the protector includes: an upper portion extending upward so as to be in close contact with a bottom face of the upper plate of the outer casing; and a lower portion, wherein the lower portion includes: a sealing member made of a rubber material, wherein the sealing member extends downward to closely contact a top face of the outer peripheral portion of the vibration plate; and a support member made of a plastic material, wherein the support member closely contacts a side face of the sealing member to support the sealing member.

Abstract: The inside of the housing of an acoustic device, such as an earphone, is divided into two or more spaces based on a driver. Diaphragms are disposed to cover a nozzle communicating with an ear of a user and a vent hole formed in the back of the housing. Optimum sound quality can be secured by adjusting the sizes of the spaces formed by the diaphragms and the housing and the locations where the diaphragms are disposed. When the housing is of a sealed type, low-band sound pressure can be effectively prevented from being lost.

Abstract: The present disclosure provides a micro speaker device with a water-proof structure by which water entering a protector is prevented from entering a gap formed between a top face of the protector and a bottom face of an upper plate of an outer casing and a gap formed between a bottom face of the protector and a top face of an outer peripheral portion of a vibration plate. For this end, the protector includes: an upper portion extending upward so as to be in close contact with a bottom face of the upper plate of the outer casing; and a lower portion, wherein the lower portion includes: a sealing member made of a rubber material, wherein the sealing member extends downward to closely contact a top face of the outer peripheral portion of the vibration plate; and a support member made of a plastic material, wherein the support member closely contacts a side face of the sealing member to support the sealing member.