Plug for endoscope

Abstract

A plug for endoscope includes a flexible tube-shaped sheath through which a plurality of wires are inserted. The plurality of wires is connected to an insertion tip portion having an image capturing portion. The plug for endoscope includes a housing having a substrate accommodation portion and a sheath introduced portion. The substrate accommodation portion accommodates a substrate, a base end aperture portion of the sheath passed through an opening of the housing is arranged in the sheath introduced portion, and a part of the plurality of wires derived from the base end aperture portion is connected to the substrate.

What is claimed is: 
     
         1 . A plug for endoscope comprising:
 a flexible tube-shaped sheath through which a plurality of wires are inserted, the plurality of wires being connected to an insertion tip portion having an image capturing portion; and   a housing having a substrate accommodation portion and a sheath introduced portion,   wherein the substrate accommodation portion accommodates a substrate, and a base end aperture portion of the sheath passed through an opening of the housing is arranged in the sheath introduced portion,   wherein a part of the plurality of wires derived from the base end aperture portion is connected to the substrate, and   wherein the substrate accommodation portion of the housing is covered with a water-tight structure so that the substrate accommodation portion and a sheath introduced portion are spatially isolated from each other, the sheath being arranged in the sheath introduced portion.   
     
     
         2 . A plug for endoscope comprising:
 a flexible tube-shaped sheath through which a plurality of wires are inserted, the plurality of wires being connected to an insertion tip portion having an image capturing portion;   a housing having a substrate accommodation portion and a sheath introduced portion, wherein the substrate accommodation portion accommodates a substrate, a base end aperture portion of the sheath passed through an opening of the housing is arranged in the sheath introduced portion, and a part of the plurality of wires derived from the base end aperture portion is connected to the substrate; and   a cover that is provided inside the housing, is water-tightly penetrated by a part of the plurality of wires, and water-tightly covers the substrate.   
     
     
         3 . A plug for endoscope comprising:
 a flexible tube-shaped sheath through which a plurality of wires are inserted, the plurality of wires being connected to an insertion tip portion having an image capturing portion;   a housing having a substrate accommodation portion and a sheath introduced portion; and   a cover that is provided inside the housing, and water-tightly covers the substrate,   wherein the substrate accommodation portion accommodates a substrate, a base end aperture portion of the sheath passed through an opening of the housing is arranged in the sheath introduced portion, and a part of the plurality of wires derived from the base end aperture portion is connected to the substrate,   wherein a liquid intrusion prevention wall is provided to stand on a bottom wall of the housing, and the bottom wall is arranged under side of the base end aperture portion of the sheath in a substantially vertical direction, and the substrate accommodation portion and the sheath introduced portion are spatially isolated from each other, and   wherein a part of the plurality of wires which water-tightly penetrates the cover includes a conductive transmission cable.   
     
     
         4 . The plug for endoscope according to  claim 3 ,
 wherein a flange portion bulges out from an outer circumference of the housing and is entirely formed over the outer circumference.   
     
     
         5 . The plug for endoscope according to  claim 3 ,
 wherein the housing is configured to be bisected into an upper housing and a lower housing with an axis line of a substantially quadrangular pyramid shape as a boundary, and a bonding portion of the upper housing and the lower housing is water-tightly sealed by an adhesive such that the upper housing and the lower housing are integrally assembled.