Developer container, developer supplying device, and image forming apparatus

1. A toner bottle comprising:

a bottle main part to contain toner therein and having a rotational axis;

an outlet at an end of the bottle main part;

a spiral raised ridge in an inner wall of the bottle main part and arranged to deliver the toner contained in the bottle main part to the outlet by rotation of the bottle main part around the rotational axis;

a plurality of toner guiding portions on a side of the spiral raised ridge adjacent to the outlet and arranged to move the toner to the outlet beyond the spiral raised ridge; and

a gear adjacent to the outlet to rotate the bottle main part around the rotational axis,

wherein the bottle main part has a diameter larger than a diameter of the outlet, and the gear is integral with the bottle main part between the outlet and the plurality of toner guiding portions.

2. The toner bottle according to claim 1 , wherein each of the plurality of toner guiding portions projects inward of the outlet and is closer to a center of the rotational axis of the bottle main part than the outlet.

3. The toner bottle according to claim 1 , further comprising:

a plurality of shoulders adjacent to a portion of the toner bottle where the gear is disposed, each of the plurality of shoulders being raised outward and having a straight outline and a curved outline extending from the straight outline.

4. The toner bottle according to claim 1 , wherein each of the plurality of toner guiding portions includes an acute angle relative to the rotational axis which is smaller than an acute angle of the spiral raised ridge relative to the rotational axis.

5. The toner bottle according to claim 1 , wherein the plurality of toner guiding portions include only two toner guiding portions.

6. The toner bottle according to claim 3 , wherein the plurality of shoulders include only two shoulders.

7. A toner bottle comprising:

a bottle main part to contain toner therein and having a rotational axis;

an outlet at an end of the bottle main part;

a spiral raised ridge in an inner wall of the bottle main part and arranged to deliver the toner contained in the bottle main part to a location adjacent to the outlet by rotation of the bottle main part around the rotational axis;

a plurality of toner guiding portions on a side of the spiral raised ridge adjacent to the outlet and arranged to forward the toner, which is delivered to the location by the spiral raised ridge, to the outlet by rotation of the bottle main part around the rotational axis; and

a gear adjacent to the outlet to rotate the bottle main part around the rotational axis,

wherein the bottle main part has a diameter larger than a diameter of the outlet, and the gear is formed integrally with the bottle main part between the outlet and the plurality of toner guiding portions.

8. The toner bottle according to claim 7 , wherein each of the plurality of toner guiding portions projects inward of the outlet and is closer to a center of the rotational axis of the bottle main part than the outlet.

9. The toner bottle according to claim 7 , further comprising a plurality of shoulders adjacent to a portion of the toner bottle where the gear is disposed, each of the plurality of shoulders being raised outward and having a straight outline and a curved outline extending from the straight outline.

10. The toner bottle according to claim 7 , wherein each of the plurality of toner guiding portions includes an acute angle relative to the rotational axis which is smaller than an acute angle of the spiral raised ridge relative to the rotational axis.

11. The toner bottle according to claim 7 , wherein the plurality of toner guiding portions include only two toner guiding portions.

12. The toner bottle according to claim 9 , wherein the plurality of shoulders include only two shoulders.