To provide a hollow molding that is able to cope with various frequency bands at a low manufacturing cost.SOLUTION: A resonator 19 according to a present embodiment comprises: a molding body 25 with a hollow part 23 formed therein; and four ducts, i.e., a first duct 41 to a fourth duct 44, communicating with the hollow part 23 and projecting from the molding body 25. Of the four ducts, the leading end of the second duct 42 is open whereas the respective leading ends of the first duct 41, the third duct 43, and the fourth duct 44, other than the second duct 42, are closed.SELECTED DRAWING: Figure 3
【課題】安価な製造コストで様々な周波数帯域に対応可能な中空成形品を提供する。【解決手段】本実施形態に係るレゾネータ19は、内部に中空部23が形成された成形品本体25と、前記中空部23に連通すると共に前記成形品本体25から突出する4本の第1ダクト41〜第4ダクト44と、を備えている。前記4本のダクトのうち、第2ダクト42の先端は開放され、前記第2ダクト42以外の第1ダクト41、第3ダクト43および第4ダクト44の先端は閉塞している。【選択図】図3
HOLLOW MOLDING
中空成形品
2019-01-17
Patent
Elektronische Ressource
Japanisch
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