Linear vibrator and method of manufacturing the same

1. A linear vibrator comprising:

a case including a cylindrical sidewall part forming a sidewall thereof and a cover coupled to one end of the sidewall part; and

an elastic member including at least one connection protrusion and connected to the case while the connection protrusion is interposed between the sidewall part and the cover,

wherein the cover includes at least one exposure groove formed in an outer peripheral edge thereof and the upper surface of the connection protrusion is exposed to the outside by the exposure groove.

2. The linear vibrator of claim 1 , wherein the sidewall part includes at least one connection groove formed in one end thereof, the connection groove having the connection protrusion inserted thereinto.

3. The linear vibrator of claim 1 , wherein the sidewall part includes at least one fitting protrusion protruded from one end thereof,

the cover includes at least one fitting groove formed along an outer peripheral edge thereof, and

the sidewall part and the cover are coupled to each other while the fitting protrusion is inserted into the fitting groove.

4. The linear vibrator of claim 1 , wherein the cover includes at least one coupling protrusion protruded from an outer peripheral edge thereof in a diameter direction, and

the sidewall part includes at least one coupling groove formed in one end thereof, the coupling groove having the coupling protrusion fitted thereinto.

5. The linear vibrator of claim 1 , wherein the elastic member is connected to the case in order that the connection protrusion thereof is exposed to the outside of the case.

6. The linear vibrator of claim 5 , wherein the elastic member is bonded to the case by welding the connection protrusion exposed to the outside to the case.