FUEL SUPPLY DEVICE

To reduce the number of components by surely fixing a pressure adjustment valve to a case member only by inserting the pressure adjustment valve to a housing portion of the case member formed on a fuel supply passage for supplying a fuel.SOLUTION: A pressure adjustment valve 22 is disposed and constituted to be housed in a case member 30. The case member 30 includes a housing portion 36. A side part 42 of the housing portion 36 is formed as an elastic deformation part 43 elastically deformable to a radial outer side. An inlet-side end portion into which the pressure adjustment valve 22 is input at the elastic deformation part 43 is provided with a coming-off prevention structure 86 for the pressure adjustment valve 22. The coming-off prevention structure 86 is composed of an engagement piece 88 disposed on a lower end portion of the elastic deformation part 43 and an engagement portion 90 set at a lower end portion of the housing 46, the engagement piece 88 includes a projection piece 92 forming a fitting recessed portion 94 to be fitted to the engagement portion 90 at the lower end portion of the housing 46, and the elastic deformation part 43 is prevented from being displaced to a radial outer side.SELECTED DRAWING: Figure 5 【課題】燃料を供給する燃料供給経路に形成されるケース部材の収容部に圧力調整弁を挿入するだけで、圧力調整弁をケース部材に確実に固定して、部品点数の削減を図る。【解決手段】圧力調整弁２２はケース部材３０に収容される配置構成となっている。ケース部材３０には収容部３６を備える。収容部３６の側面部位４２は径方向外方に弾性変形可能な弾性変形部位４３として形成されている。弾性変形部位４３における圧力調整弁２２を挿入する入口側の端部は圧力調整弁２２の抜け止め構造８６が構成されている。抜け止め構造８６は、弾性変形部位４３の下端部に設定される係合片８８と、ハウジング４６の下端部に設定される係合部９０とからなるかつ、この係合片８８にはハウジング４６の下端部の係合部９０と嵌り合う嵌合凹部９４を形成する突起片９２を備え、弾性変形部位４３が径方向外側に変位することが防止される構成となっている。【選択図】図５