An object of the present invention does not require a power supply as a driving source, easily generating bubbles in the operation manual providing a beverage foam generator which can be. A large-diameter in the casing 8 inlet 3, the small diameter of the throttle channel 9, successively communicating formed coaxially toward the negative pressure chamber 10 and expanding portion 11 to downstream, the negative pressure chamber 10 and communicated with the small diameter of the air inlet passage 12 from the radially outward, expanding portion 11 is formed in a conical shape that the diameter gradually toward the downstream, impact wall of the large area that faces the bottom surface throttle channel is set to 13, the microbubble generator 2 comprising forming an outlet 14 at the bottom outer periphery of the expansion portion 11 provided to the inlet 3 of the large diameter communicates with the outlet 7 of the manual pump for pumping the beverage.BACKGROUND 2【課題】駆動源としての電源を必要とせず、手動による操作で簡単に泡を発生させることができる飲料泡発生器を提供する。【解決手段】ケーシング8内に大径の流入口3、小径の絞り流路9、負圧室10及び拡開部11を下流に向けて順次同軸に連通形成し、負圧室10に小径の空気流入路12を半径方向外方から連通させ、拡開部11は下流に向かって次第に大径となる円錐状に形成し、底面を絞り流路と対面する広い面積の衝突壁13とし、拡開部11の底部外周に流出口14を形成してなるマイクロバブル発生装置2を設け、大径の流入口3に飲料を圧送する手動ポンプの流出口7を連通させる。【選択図】図2
