STATOR UNIT, MOTOR, AND METHOD OF MANUFACTURING STATOR UNIT

PROBLEM TO BE SOLVED: To provide a structure and a manufacturing method capable of preventing a base member from being damaged by a load from a mold when a mold resin part is molded.SOLUTION: A stator unit comprises a base member 21, an armature, a circuit board 24, and a mold resin part. The base member 21 extends substantially perpendicularly to a central axis extending vertically. The armature is located at an upper side of the base member 21. The circuit board 24 is located at an upper side of the base member 21, and electrically connected with the armature. The mold resin part covers the armature and the circuit board 24. When the mold resin part is molded, firstly, the base member 21 is supported by a first mold 61. Next, a cavity 60 is formed between the combined first and second mold 61 and 62. At that time, the second mold 62 is pressed against a convex part provided radially outside the circuit board 24 in a plan view, of an upper surface of the base member 21. The convex part becomes a convex part mark 71 by being flattened. Thereafter, a molten resin is poured into the cavity 60.SELECTED DRAWING: Figure 4 【課題】モールド樹脂部の成型時に、金型からの荷重でベース部材が破損することを防止できる構造および製造方法を提供する。【解決手段】ステータユニットは、ベース部材２１、電機子、回路基板２４、およびモールド樹脂部を備える。ベース部材２１は、上下に延びる中心軸に対して略垂直に拡がる。電機子は、ベース部材２１の上側に位置する。回路基板２４は、ベース部材２１の上側に位置し、電機子と電気的に接続される。モールド樹脂部は、電機子および回路基板２４を覆う。モールド樹脂部の成型時には、まず、第１金型６１でベース部材２１を支持する。次に、第１金型６１と第２金型６２とを組み合わせた間に空洞６０を形成する。その際、ベース部材２１の上面のうち、平面視において回路基板２４よりも径方向外側に設けられた凸部に、第２金型６２を押し付ける。凸部は、潰されることによって凸部痕７１となる。その後、空洞６０に溶融樹脂を流し込む。【選択図】図４