| 摘要 |
A jack capable of reducing a size by providing a connection piece (46) used also as a mouthpiece at the mouthpiece portion of a sleeve part (12), wherein a plug connecting sleeve spring (13) having a contact point facing outward is disposed on a part of the sleeve part (12), and the contact point of the sleeve spring (13) is supported by three points by using the right and left end parts formed in an arc as support shafts and bending its center part in the center direction of the arc, whereby the forming of the sleeve spring (13) becomes easier because it can be manufactured by merely punching and bending it, requirement for dimensional accuracy is moderated, and an assembly becomes easier even if it is reduced in size. |
