Abstract: A portable sound apparatus including a body wearable on a user's body, an ear bud holder formed on the body, the ear bud holder being closed on one side and having an opening on an opposite side, an ear bud having one side inserted into the ear bud holder and an opposite side exposed through the opening of the ear bud holder, and a first magnet positioned in the ear bud holder is provided. The ear bud includes an ear bud housing having a sound hole on one side, an ear tip coupled to the sound hole and positioned within the ear bud holder when the ear bud is coupled to the ear bud holder, a receiver positioned inside the ear bud housing and configured to output sound through the sound hole, and a second magnet having an opposite polarity to the first magnet.

Abstract: A portable sound apparatus including a body wearable on a user's body, an ear bud holder formed on the body, the ear bud holder being closed on one side and having an opening on an opposite side, an ear bud having one side inserted into the ear bud holder and an opposite side exposed through the opening of the ear bud holder, and a first magnet positioned in the ear bud holder is provided. The ear bud includes an ear bud housing having a sound hole on one side, an ear tip coupled to the sound hole and positioned within the ear bud holder when the ear bud is coupled to the ear bud holder, a receiver positioned inside the ear bud housing and configured to output sound through the sound hole, and a second magnet having an opposite polarity to the first magnet.

Abstract: A portable keyboard includes a plurality of key assemblies including a plurality of key tops, a main body of a pillar shape of n angles, which is located in the vicinity of a first key assembly among a plurality of the key assemblies and includes a plurality of sides, a flexible connection member configured to connect a plurality of the key assemblies with the main body, and a main board configured to be embedded in the inside of the main body and process input signals inputted from a plurality of the key assemblies. In this case, the main body includes a first side of which one edge of the first side is connected with the flexible connection member, a second side adjacent to another edge of the first side and the second side of which an angle with the first side is equal to or greater than 90 degrees, and a cradle configured to combine one end of the cradle with the second side using a hinge to make the cradle to be rotated and the cradle configured to be contacted with the second side.

Abstract: A portable keyboard includes a plurality of key assemblies including a plurality of key tops, a main body of a pillar shape of n angles, which is located in the vicinity of a first key assembly among a plurality of the key assemblies and includes a plurality of sides, a flexible connection member configured to connect a plurality of the key assemblies with the main body, and a main board configured to be embedded in the inside of the main body and process input signals inputted from a plurality of the key assemblies. In this case, the main body includes a first side of which one edge of the first side is connected with the flexible connection member, a second side adjacent to another edge of the first side and the second side of which an angle with the first side is equal to or greater than 90 degrees, and a cradle configured to combine one end of the cradle with the second side using a hinge to make the cradle to be rotated and the cradle configured to be contacted with the second side.