Speaker

1. A speaker, comprising:

a holder having a frame having a side wall, a receiving cavity and an acoustic hole communicating with the receiving cavity, the side wall having an engaging slot near the acoustic hole;

a magnetic circuit system received in the receiving cavity of the holder; and

a guiding portion attached on the holder and having a magnetic plate and a lower case coupled on the holder for fixing the magnetic plate, the magnetic plate having a connecting portion exposed from an outer surface of the holder and disposed near the acoustic hole;

wherein the guiding portion is capable of guiding magnetic leakage leaked from the magnetic circuit system to attract the ferromagnetic material dust near the acoustic hole; and

wherein the lower case has a bottom, a fitting portion extending from the bottom and received in the engaging slot of the frame and a second cavity formed by the fitting wall together with the bottom; the fitting portion has a first fixing portion extending from an outer surface of the fitting portion towards the second cavity for receiving the connecting portion of the magnetic plate.

2. The speaker as described in claim 1 , wherein the speaker further has a vibrating system received in the receiving cavity and divided the receiving cavity into a front cavity communicated with the acoustic hole and a rear cavity opposite to the front cavity for receiving the a magnetic circuit system, and the guiding portion is partially positioned in the rear cavity.

3. The speaker as described in claim 2 , wherein the guiding portion has a magnetic plate having a body portion facing the magnetic circuit system and athe connecting portion extending from the body portion.

4. The speaker as described in claim 3 , wherein the magnetic circuit system has a yoke having a seating portion and a magnet attached on the seating portion of the yoke; the body portion is faced the seating portion for guiding magnetic leakage leaked from the yoke.

5. The speaker as described in claim 3 , wherein the magnetic circuit system has a yoke having a seating portion and a magnet attached on the seating portion of the yoke; the body portion is connected with the seating portion for guiding magnetic leakage leaked from the yoke.

6. The speaker as described in claim 1 , wherein the bottom has a first surface near the magnetic circuit system, a second surface opposite to the first surface and a second fixing portion extending form the first surface of the bottom towards the second surface of the bottom for receiving the body portion of the magnetic plate.

7. The speaker as described in claim 2 , wherein the holder further has an upper case mounted on the side wall.