Branching passage assembly for endoscopic biopsy channel
First Claim
Patent Images
1. A branching passage assembly for an endoscope comprising:
- a forked branching member internally positioned in a casing of a manipulating head assembly to connect a base end of a biopsy channel running through an insertion tube of said endoscope with a biopsy channel entrance way and a suction passage,wherein said forked branching member is retained in position by threaded engagement with an inner end of a biopsy channel entrance pipe fitted in said biopsy channel entrance way, and said forked branching member is associated with restrictive members arranged to restrict movements of said branching member in all directions except a movement in a direction toward said biopsy channel entrance pipe when said branching member is pulled toward the latter for threaded engagement therewith, said casing of said manipulating head assembly is formed by joining a main cover section and a grip cover section, and arranged to support a manipulating member of an angulation control mechanism on said main cover section and to accommodate said branching member internally of said grip cover section, said branching member is located internally in passage-forming structural members including first and second tubular members provided internally in said casing of said manipulating head assembly to extend from said main cover section to said grip cover section and connected with each other through a reinforcing ring, and a notched void portion is provided in part of said first tubular member and said reinforcing ring, said second tubular member being fitted on said reinforcing ring, said forked branching member having a threaded connecting portion projected toward said biopsy channel entrance pipe through said notched void portion, said restrictive members being constituted by a pair of laterally projecting stopper blades provided on said branching member, said stopper blades being placed in said notched void portion and held in abutting engagement with vertical and horizontal surfaces at notched portions of said reinforcing ring within said second tubular member.
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Abstract
Mounted internally of a casing of a manipulating head assembly of an endoscope is a branching passage member to connect a base end of a biopsy channel with a biopsy channel entrance way and a suction passage. The branching passage member is retained in position by threaded engagement with a biopsy channel entrance pipe which is fitted in the biopsy channel entrance way. Further, the branching passage member is provided with restrictive members thereby to restrict movements of the branching member except a movement toward the biopsy channel entrance pipe when the branching member is pulled into the biopsy channel entrance way for engagement with the entrance pipe.
62 Citations
14 Claims
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1. A branching passage assembly for an endoscope comprising:
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a forked branching member internally positioned in a casing of a manipulating head assembly to connect a base end of a biopsy channel running through an insertion tube of said endoscope with a biopsy channel entrance way and a suction passage, wherein said forked branching member is retained in position by threaded engagement with an inner end of a biopsy channel entrance pipe fitted in said biopsy channel entrance way, and said forked branching member is associated with restrictive members arranged to restrict movements of said branching member in all directions except a movement in a direction toward said biopsy channel entrance pipe when said branching member is pulled toward the latter for threaded engagement therewith, said casing of said manipulating head assembly is formed by joining a main cover section and a grip cover section, and arranged to support a manipulating member of an angulation control mechanism on said main cover section and to accommodate said branching member internally of said grip cover section, said branching member is located internally in passage-forming structural members including first and second tubular members provided internally in said casing of said manipulating head assembly to extend from said main cover section to said grip cover section and connected with each other through a reinforcing ring, and a notched void portion is provided in part of said first tubular member and said reinforcing ring, said second tubular member being fitted on said reinforcing ring, said forked branching member having a threaded connecting portion projected toward said biopsy channel entrance pipe through said notched void portion, said restrictive members being constituted by a pair of laterally projecting stopper blades provided on said branching member, said stopper blades being placed in said notched void portion and held in abutting engagement with vertical and horizontal surfaces at notched portions of said reinforcing ring within said second tubular member. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A branching passage assembly for an endoscope comprising:
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a manipulating head assembly having a casing; a forked branching member internally positioned in the casing of the manipulating head assembly and configured to connect a base end of a biopsy channel running through an insertion tube of the endoscope with a biopsy channel entrance way and a suction passage, the forked branching member being retained in position by threaded engagement with an inner end of a biopsy channel entrance pipe fitted in the biopsy channel entrance way; and restrictive means for restricting movements of the branching member in all directions except a movement in a direction toward the biopsy channel entrance pipe when the branching member is pulled toward the biopsy channel entrance pipe for threaded engagement therewith, wherein the casing of the manipulating head assembly is formed by joining a main cover section and a grip cover section, and arranged to support a manipulating member of an angulation control mechanism on the main cover section and to accommodate the branching member internally in the grip cover section, the branching member is located internally in passage-forming structural members including first and second tubular members provided internally in the casing of the manipulating head assembly to extend from the main cover section to the grip cover section and connected with each other through a reinforcing ring, and a notched void portion is provided in part of the first tubular member and the reinforcing ring, the second tubular member being fitted on the reinforcing ring, the forked branching member having a threaded connecting portion projected toward the biopsy channel entrance pipe through the notched void portion, the restrictive means comprising a pair of laterally projecting stopper blades provided on the branching member, the stopper blades being placed in the notched void portion and held in abutting engagement with vertical and horizontal surfaces at notched portions of the reinforcing ring within the second tubular member. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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Specification