Abstract: An electrosurgical generator with a high-voltage power supply that supplies a DC output voltage receives the DC output voltage of the high-voltage power supply and generates a high-frequency AC output voltage. When generator is operating, a control unit receives signals from an AC output voltage measuring unit and current measuring unit. The control unit limits an increase of DC output voltage of the high-voltage power supply as soon one predefined maximum value is reached or exceeded. When the generator is operating, the control unit configured to receive signals from a DC output voltage measuring unit that represent a respective current value of the DC output voltage, and to compare a respective current value of DC output voltage with a predefined minimum value for DC output voltage, and to cause the DC output voltage of the high-voltage power supply to increase as soon as it falls below the predefined minimum value.

Abstract: An endoscope apparatus includes: an endoscope including a first operation portion that is coupled to a first insertion portion to be inserted into a subject; a medical device including a second operation portion that is coupled to a second insertion portion to be inserted into the subject through the first insertion portion, the second operation portion including at least one locking member; and a belt-like body having flexibility and including at least three end portions in which at least one end portion includes a locked portion to be locked to the locking portion, the belt-like body being configured to be wound around the endoscope to hold and fix the second operation portion of the medical device in a state where the at least three end portions are connected to the second operation portion.

Abstract: A tubular connector for use with a spiral tube used on an insertion section of an endoscope. The tubular connector including: an outer surface; an inner surface; and a plurality of cams circumferentially spaced on the inner surface to project radially inward from the inner surface, the plurality of cams extending in a longitudinal direction of the tubular connector; wherein each of the plurality of cams have one or more cam surfaces configured to engage a rotating member to rotate the spiral tube. The plurality of cams can alternatively be formed directly on an interior surface of the spiral tube.

Abstract: A focus detection device, comprising an image sensor, and that performs focus detection by calculating evaluation values representing contrast based on an image signal, while executing a scan operation of the image sensor, comprising a positional change detection circuit for detecting positional change of the focus detection device, and a processor having a running time setting section and a control section, wherein the running time setting section sets running time to restrict focus movement range of the scan operation based on the positional change, and the control section performs focus detection by restricting focus movement rage of the scan operation based on the running time.

Abstract: A distal end portion of an endoscope includes: a flexible printed circuit board on which a light-receiving unit mounting section, a first extending section, a light-emitting unit mounting section, and a second extending section are formed continuously; a stand on which the light-receiving unit mounting section is disposed in contact with the stand; a protruding portion including an inner wall surface, a protruding end surface, and an outer wall surface, in which the first extending section is disposed in contact with the inner wall surface, the light-emitting unit mounting section is disposed in contact with the protruding end surface, and the second extending section is disposed in contact with the outer wall surface; and a distal end cover that covers the stand and the protruding portion, with the second extending section being sandwiched between the distal end cover and the protruding portion.

Abstract: A camera head includes an airtight case which includes an image pickup unit having an image pickup device and the like as a heat source in an inner portion and includes a partition wall to secure air-tightness with respect to an outside of the airtight case, a heat transfer sheet which connects the heat source and an inner surface of the partition wall to transfer heat generated at the heat source to the partition wall, a heat sink arranged on an outer side of the partition wall of the airtight case, and a spring member which is interposed between an outer surface corresponding to the inner surface of the partition wall of the airtight case connected to the heat transfer sheet and the heat sink to transfer heat from the outer surface of the partition wall to the heat sink.

Abstract: A processor of an endoscope system detects from the observation images a lesion area which is an observation target of the endoscope, judges a level of an oversight risk which is a risk that an operator may overlook the lesion area, on the basis of the observation images, and controls notification methods of detection of the lesion area on the basis of the level of the oversight risk. The processor displays the marker image indicating the lesion area only in a second image region of the display apparatus when a level of the oversight risk relating to the lesion area is a first level and displays the marker image in both a first image region and the second image region which is smaller than the first image region when a level of the oversight risk relating to the lesion area is a second level higher than the first level.

Abstract: A medical device with a power supply for connecting to an AC power grid in the range of >50 VAC to 264 VAC (wide range) features a circuit for only connecting at least one discharge resistor in parallel to at least one smoothing capacitor if no AC input voltage is present at the power supply. The power supply features a rectifier and at least one smoothing capacitor for smoothing a direct voltage to be supplied by the power supply, as well as at least one discharge resistor for discharging the smoothing capacitor. The power supply features a circuit electrically connected to the discharge resistor and the smoothing capacitor, designed to detect a switched-on state of the medical device with an AC input voltage present at its power supply, and to only connect the discharge resistor in parallel to the smoothing capacitor if the circuit does not detect a switched-on state.

Abstract: A method for reconditioning an endoscope in a reconditioning apparatus, the method including: connecting an interior of the endoscope to a leakage tester of the reconditioning apparatus; supplying the interior with a fluid at a predefined pressure; carrying out a reconditioning process using a rinsing liquid; monitoring the pressure in the interior of the endoscope during the reconditioning process; and identifying the endoscope as defective if a profile of the pressure deviates from a predefined pressure profile; wherein the predefined pressure profile is determined according to process parameters of the reconditioning process.

Abstract: A treatment instrument includes a grasping piece that is openable and closable to a treatment portion, and includes an electrode member. An electrode inclination surface facing a side on which the treating portion is located is provided on an outer surface of the electrode member of the grasping piece, and the electrode inclination surface extends from an inner side to an outer side in a width direction so as to be inclined in a direction away from the treatment portion.

Abstract: An external mechanism for an endoscope includes: a bending wheel configured to engage with a second UD knob of a second bending operation device provided in an operation portion of an endoscope; a motor portion configured to generate a driving force for rotating the bending wheel; a housing case housing the bending wheel and the motor portion and detachably attached to the operation portion, and an operation switch arranged outside the housing case and configured to output a control signal to the motor portion due to the operating element being operated, in which the operation switch is pivotally supported by the rotation shaft and rotates with respect to the housing case.

Abstract: An electrically conductive irrigation fluid for use in bipolar resectoscopic surgery, wherein the irrigation fluid being brought into contact with the electrode of a resectoscope and tissue being coagulated and/or resected by means of the electrode surrounded by the irrigation fluid, wherein the irrigation fluid includes metal ions. Moreover, the method relates to a resectoscopy system including a resectoscope and an irrigation system that is connected to the resectoscope, the resectoscope having a handle and a tubular shaft, and the shaft including an electrode instrument that is arranged so as to be longitudinally displaceable and has in its distal end region an electrode to which high-frequency current can be applied, wherein the irrigation system includes an irrigation fluid, which can be conducted through the shaft of the resectoscope to the electrode.

Abstract: In a method of forming an access route to the bile duct, a needle is introduced into a duodenum, and the introduced needle is pierced into an oral side projection of a duodenal papilla, which is located at an oral position than an opening of the duodenal papilla. The tip of the pierced needle is made to reach the inside of the bile duct to form a tunnel communicating the duodenum and the bile duct, and a treatment device is inserted into the formed tunnel.

Abstract: A bonded body includes: a first base body including a first wiring, a first electrode made of an electroplating film and including a first surface having a first region covering a periphery of an end portion of the first wiring and a second region covering the end portion of the first wiring, and a first passivation layer made of an insulating material and covering a periphery of the first electrode; a second base body including a second electrode; and solder disposed between the first region of the first electrode and the second electrode.

Abstract: A force transmission mechanism includes a force adjuster that receives a driving force and that is configured to change a force transmission efficiency, and also includes a driving member that is configured to connect an end effector and the force adjuster via a joint section and transmit the driving force. The force adjuster converts the driving force into a linear force via a rotational force, and increases the conversion efficiency from the driving force to the linear force such that an amount of increase in the force transmission efficiency increases with increasing displacement amount of the driving member when the driving member is displaced in accordance with flexing or curving of the joint section.

Abstract: A joint ring includes a main body part and a pair of protrusion parts protruding from a first surface of the main body part in a direction of a central axis thereof and having spherical surfaces on protruding portions. The main body part includes a pair of engagement holes and a pair of receiving holes. The protrusion parts include engagement parts which are configured to be capable of being inserted into the engagement holes. When the joint rings are arranged in the direction of the central axis and the protrusion parts of a first joint ring enter the receiving holes of a second joint ring, the spherical surfaces come into contact with receiving surfaces inside the receiving holes, and the first joint ring and the second joint ring become rotatable relative to each other with a line segment connecting centers of the respective spherical surfaces as a rotational center.

Abstract: Embodiments of the technology disclosed herein is directed to a medical manipulator capable of detecting an instant when a tip of the medical manipulator is unexpectedly separated from a body tissue and thus avoid making contact with surrounding body tissues. The technology disclosed eliminates the needs for providing a force sensor located on the tip of the medical manipulator. The medical manipulator includes a movable unit at one end and an electric motor, a control unit, and an operation input unit at opposed end thereof. The movable unit includes a treating unit for treating the body tissue. The electric motor is configured to operate the movable unit. The electric motor includes a current sensor or a torque detecting unit for detecting the torque of the motor. The control unit includes a torque reducing unit for reducing the torque transmitted to the movable unit from the electric motor.

Abstract: A control method for an endoscope reprocessor is a control method for an endoscope reprocessor that includes a treatment tank, a circulation conduit that links a circulation opening and a discharge opening opened in the treatment tank to each other, a first pump that feeds liquid from the circulation opening towards the discharge opening, an atmospheric open conduit including a first end portion open to an atmosphere and a second end portion connected between the circulation opening and the first pump in the circulation conduit, a filter that filtrates a liquid flowing from the treatment tank through the circulation opening into the circulation conduit, and a sensor that detects a liquid feeding state in the circulation conduit, where the liquid feeding state in the circulation conduit is measured by the sensor during operation of the first pump in a state where the inside of the atmospheric open conduit is closed.

Abstract: A focus adjustment device, comprising: a processor having a main physical object position detection circuit for detecting position of a main object based on an image signal, a distance value detection circuit for detecting distance values in accordance with object distance of a plurality of AF regions based on the image signal, a candidate region setting section for setting regions exhibiting a distance value for a close-range side of greater than a specific value, with respect to a statistic for distance value of regions corresponding to position of the main physical object, to unnecessary candidate regions, and a control section for determining regions corresponding to unnecessary physical objects based on the unnecessary candidate regions, and controlling focus adjustment based on distance value corresponding to regions that have had regions corresponding to the unnecessary physical objects excluded from the main physical object regions.

Abstract: An image pickup apparatus for endoscope includes: an optical unit having an incident surface and an emitting surface; an image pickup unit adhering to the emitting surface; an interposer where the image pickup unit is bonded to a first electrode of a first main surface; and an electric cable bonded to the interposer. The image pickup unit is smaller than the optical unit and the interposer in an outer size in a direction orthogonal to an optical axis. The image pickup apparatus for endoscope further includes a heat conductive resin with which a portion among the emitting surface, the first main surface, and a side surface of the image pickup unit is filled. The first electrode extends to a position where the first electrode is brought into contact with the heat conductive resin.

Abstract: A tissue clipping device and system, and method for clipping tissue are disclosed. The tissue clipping device includes a clip with clip arms that is slidably disposed within a channel of a lock tube. The clip is designed to move between an open configuration in which distal ends of the clip arms are separated from each other for receiving tissue therebetween, and a closed configuration in which the distal ends of the clip arms are closer to each other than in the open configuration for clipping the tissue received therebetween. The tissue clipping system further includes a delivery device for delivering and deploying the tissue clipping device. The delivery device is releasably coupled to the tissue clipping device.

Abstract: A medical instrument comprises a housing and an elongated sheath configured to be attached to the housing. The elongated sheath includes opposed distal end and proximal end along a longitudinal axis. An end effector is configured to be attached to the distal end of the elongated sheath. The end effector includes a pair of grasps. A direction changer is used to change a direction of the end effector with respect to the distal end of the elongated sheath. A first drive shaft movable in the elongated sheath in ganged relation for opening and closing movement of the pair of grasps. A second drive shaft movable in the elongated sheath in ganged relation for angular movement of the end effector by the direction changer with respect to the elongated sheath. An operating member is configured to actuate the second drive shaft between a bent positions and a neutral position.

Abstract: An endoscope system includes an endoscope having a position/angle sensor and an amplifying circuit, a memory configured to store output error sensitivity data and a first wiring resistance value, and a processor including a signal processing circuit configured to process an output signal from the amplifying circuit. The signal processing circuit corrects an error of the output signal based on a value obtained by multiplying a difference between the first wiring resistance value and a processor wiring resistance value by the output error sensitivity data.

Abstract: A method for operating a reconditioning apparatus for cleaning and disinfecting a medical instrument(s), the medical instrument having an internal channel(s). The method including: receiving the medical instrument(s) in a reconditioning chamber; connecting the internal channel(s) to a fluid connection of fluid connections in the reconditioning chamber; flushing the internal channel(s) with a reconditioning fluid; detecting an identifying feature of medical instrument(s) indicating a type of the medical instrument(s); comparing the detected type with data sets stored in a database and, of the fluid connections, provide an allocation of a fluid connection connected to the internal channel(s) on a basis of the identified type; and subsequent to the flushing, actuating a compressed air source to apply compressed air to the allocated fluid connection such that reconditioning fluid present in the at least one internal channel is blown out of the channel.

Abstract: An ultrasound endoscope includes: an insertion portion to be inserted into a subject; an ultrasound transducer that is provided at a distal end of the insertion portion and includes plural piezoelectric element groups configured to transmit and receive ultrasound; a connector portion that is provided on a proximal end side of the insertion portion and includes plural connectors to which an external device is connected; and a cable portion including plural first coaxial lines connected to the piezoelectric element groups configured to transmit the ultrasound to a first area, and plural second coaxial lines connected to the piezoelectric element groups configured to transmit the ultrasound to a second area, the first coaxial lines being shorter in length than the second coaxial lines, the first area and the second area being where the ultrasound is transmitted.

Abstract: An endoscope includes in order from an object side, an objective optical system, an optical-path splitter, an image sensor, and an image processor. A ?/4 wavelength plate is disposed between the objective optical system and the splitter. The splitter includes first and second prisms, and has a beam splitting surface at which the first prism and the second prism are brought into close contact. The splitter splits light at the beam splitting surface, into a first optical path through which P-polarized light is transmitted and a second optical path through which S-polarized light is reflected. The first and second prisms are slid relative to one another along the beam splitting surface to adjust optical path lengths of the first and second optical paths, and are disposed at positions to cancel an amount of shift in focusing positions of extraordinary and ordinary light, and satisfy specific conditional expressions.

Abstract: An external mechanism for endoscope includes a bending wheel, a motor, a housing case, a case detachably fixing member, and a mounting restricting member obstructing mounting of a housing case on a sub operation section by interfering with a second bending upward and downward fixing lever in a state where the second bending upward and downward fixing lever is at a position other than a release position.

Abstract: An acoustic lens contains a base material composed of a diorganopolysiloxane or a silicone rubber compound utilizing a diorganopolysiloxane as a main component, and plate-like inorganic compound particles dispersed in the base material.

Abstract: A light treatment system includes: a probe configured to be inserted into a bladder, the probe including an optical fiber configured to propagate light, and a light emitter that is provided at a distal end of the optical fiber, the light emitter being configured to emit the light; and a balloon catheter into which the probe is inserted, the balloon catheter being configured to be inserted into the bladder, the balloon catheter including a distal end portion that is to be dilated in the bladder, a wall configured to divide inside of the distal end portion into two regions, and a reflector configured to reflect the light emitted by the light emitter, the reflector being provided on a surface of the wall, the surface facing a region of the two regions, the region being where the light emitter is positioned.

Abstract: An endoscope button for an endoscope including a cylinder communicating with tubes includes: a first unit and a second unit that are attachable and detachable with respect to a fitting part fixed to the cylinder, and that are separable from each other in a state being removed from the fitting part. The first unit has a cylindrical shape, and includes a cylindrical member that is attachable and detachable with respect to the fitting part. The second unit includes: a fixing member that is inserted inside the cylindrical member in a state in which the endoscope button is attached to the fitting part, and is fixed to the cylindrical member; and a first movable member that is installed movably with respect to the fixing member, and that is movable back and forth inside the cylinder in the state in which the endoscope button is attached to the fitting part.

Abstract: A vibration transmitter can include a straight portion, a curved portion, a first curved surface provided on an external surface of the curved portion, a second curved surface facing a side opposite to the first curved surface and a first portion provided on the first curved surface. The first portion can extend towards a side opposite to the side toward which the curved portion is curved and a distance between the first portion and an imaginary curved surface can increase from the proximal side toward the distal side, and the imaginary curved surface being parallel with the second curved surface.

Abstract: An insertion system having a processor including hardware, configured to: determine, for each of a plurality of times, one or more positions of an insertion section configured to be inserted into an insertion subject; determine, for the each of the plurality of times, state of the insertion section relative to the insertion subject based on the one or more positions for the each of the plurality of times; determine, for the each of the plurality of times, whether an attention state of the insertion section that restricts insertion of the insertion section into the insertion subject has occurred, based on the state of the insertion section relative to the insertion subject determined; and control a monitor to display attention state information indicating the one or more positions of the insertion section at which the occurrence of the attention state of the insertion section is determined over the plurality of times.

Abstract: The disclosed technology is directed to a treatment instrument having a vibration generating device and a handle for operation. The vibration generating device comprises a housing and a generator including a transducer disposed within the housing. The transducer generates vibration by using electric energy and a first electric contact disposed on the housing. A connector is rotatable about a predetermined rotational axis with respect to the housing of the generator. A coupler is disposed in the connector and having a second electric contact rotatable about the predetermined rotational axis with respect to the first electric contact in a state in which an electric connection of the second electric contact to the first electric contact is maintained. The connector further includes a conductive member forming a part of an electric path of a current that flows based on an operating input at an operating member provided on the handle.

Abstract: A dilator, dilating a narrowed part of a paranasal sinus, includes an end effector, and the end effector includes a pair of treatment pieces openable and closable relative to each other. Each of the treatment pieces includes a treatment surface facing a side on which the treatment piece opens, and each of the treatment surfaces includes an inclined surface inclined to be closer to a side on which the treatment piece closes as a distance to a distal end of the treatment piece decreases. The pair of inclined surfaces become parallel or substantially parallel to each other when the treatment pieces are opened to a maximum angle. The end effector opens anisotropically.

Abstract: Each of segments of a vibration transmitting member has a dimension of a half-wave length between mutually neighboring vibration anti-nodes and sets a vibration node as a center. In each of recess segments included in the segments, the vibration node is located in a groove, and an intermediate extension extends from a proximal end to a distal end in the groove in a longitudinal direction. At least two of the recess segments are different from each other with respect to at least one of a dimension in the longitudinal direction of the intermediate extension and a cross-sectional area perpendicular to the longitudinal direction of the intermediate extension.

Abstract: This adhesion prevention film for medical devices is a single-layer or multilayer adhesion prevention film that is formed on the surface of a medical device. This adhesion prevention film for medical devices comprises an outermost layer that contains a plurality of conductive particles and a resin having a continuously usable temperature of 200° C. or higher. The surface of the outermost layer is provided with recesses and projections by having parts of the plurality of conductive particles exposed from the resin.

Abstract: An insertion apparatus includes: a tube in which a water feeding communication hole opens on an outer peripheral surface of the tube; a tube connector in which a water feeding branch conduit which allows an inner surface of a tube insertion hole to communicate with an outside is formed, and a second stopper portion which protrudes toward the inside of the tube insertion hole is formed; an O ring which is positioned by contacting with the second stopper portion; a spacer which is positioned by contacting with the O ring, and in which a communication hole which allows an inner surface side and an outer surface side of a wall portion to communicate with each other is formed; and an O ring which is positioned by contacting with the spacer.

Abstract: An image pickup system includes an image pickup device including an image pickup section, a first amplifier circuit capable of amplifying a video signal for each field, and a communication circuit configured to acquire a set gain of the first amplifier circuit, a second amplifier circuit configured to amplify the video signal outputted from the image pickup device, and a processor. According to a result of a detection indicating that the video signal is not amplified by the set gain in the first amplifier circuit, a correction gain to be set in the second amplifier circuit is calculated.

Abstract: A variable stiffness device includes a first elongated member in a hollow shape extending along a longitudinal axis, and a second elongated member including a heater, disposed inside an inner circumference of the first elongated member, and extending in parallel to the first elongated member along the longitudinal axis. The first elongated member includes a high bending stiffness portion and a low bending stiffness portion alternately aligned along the longitudinal axis. One of the first elongated member and the second elongated member includes a shape-memory pipe. The heater extends through an inner space of the shape-memory pipe and configured to heat the shape-memory pipe to increase stiffness of the shape-memory pipe.

Abstract: A medical apparatus includes a first jaw; a second jaw that opens and closes with the first jaw; a shaft to which the second jaw is pivotably attached; and a sliding member provided between the second jaw and the shaft, abutted to each of the second jaw and the shaft, and configured to be slidable with respect to at least one of the second jaw or the shaft.

Abstract: A video endoscope including: an elongated shaft having an inner shaft tube and an outer shaft tube; and an electrical connecting element extending in a longitudinal direction of the shaft between the inner shaft tube and the outer shaft tube. Wherein the electrical connecting element is configured as a flexible printed circuit board with at least one conducting path which is routed substantially parallel to a longitudinal axis of the shaft, and the electrical connecting element is routed at an angle with respect to the longitudinal axis of the shaft at at least one location of the shaft.

Abstract: A medical instrument includes a housing, a movable handle, and a spring. The movable handle is configured to move between a first position as an opened position and a second position as a closed position with respect to the housing. The spring is provided between the housing and the movable handle. The spring is configured to apply a biasing force to the housing or the movable handle. The spring is provided to alleviate an increase in the biasing force generated in the spring in response to the movable handle moving from the first position to the second position.

Abstract: An imaging system, comprising a shooting operation interface that operates to form an image of a subject, and a processor that has a bio-information acquisition section and a stress determination section, wherein the bio-information acquisition section acquires bio-information of an operator when, during shooting awaiting action where an instant for acquiring still images is awaited, the shooting operation interface is operated, and the stress determination section determines stress conditions that shooting actions place on the operator based on the bio-information that has been acquired using the bio-information acquisition section.

Abstract: An endoscope apparatus includes a compression processing control unit configured to carry out a compression processing of compressing image data by using a compression parameter to generate compressed data, a monitor that is a display unit configured to display a display image corresponding to the image data, an information quantity detection unit configured to detect a quantity of information on an object contained in the image data, and a judgement unit configured to carry out a judgement processing of judging whether or not a judgement value corresponding to the quantity of information is smaller than a predetermined threshold. The image pickup of the object and the generation of the image data are continuously performed multiple times, and the judgement processing is carried out whenever the image data is generated. The compression parameter and the display image are determined based on a result of the judgement processing.

Abstract: An optical connecting device for a surgical instrument including a coupling for connecting first and second optical fiber bundles. The coupling including: a tubular sleeve having an outer surface defining an internal space for receiving an end of the first optical fiber bundle in the internal space of the tubular sleeve; a clamp movably disposed on the outer surface of the tubular sleeve, the clamp having one or more of a first convexity and a first concavity; and a union having one or more of a second convexity and a second concavity. The clamp has a continuous longitudinal opening along its longitudinal extension and on its outer side such that the clamp can be elastically deformed in a radial direction, and the clamp is configured to elastically deform such that one or more of the first convexity and the first concavity engages with one or more of the second convexity and the second concavity of the union.

Abstract: A treatment system comprises a power supply device and a treatment tool configured to communicate electrically with the power supply device so as to perform an operation on a treatment target. The treatment tool includes a sheath and an end effector configured to detachably attach to the sheath and being capable of bending with respect to the sheath. The end effector includes an electric element used to apply a treatment energy to the treatment target using an electric energy. The power supply device includes a processor. The processor sets to increase an output of the electric energy to be supplied to the electric element at in a second state. The sheath and the end effector are bent at a predetermined angle with respect to one another, compared with a first state where the sheath and the end effector are disposed straight in line with one another.

Abstract: A radial type ultrasound transducer is arranged in an ultrasound endoscope including a bending portion on a distal end side of an insertion portion. The ultrasound transducer includes: a plurality of piezoelectric elements arranged at predetermined intervals in a circumferential manner and configured to transmit and receive ultrasound waves; a plurality of electrodes arranged in the respective piezoelectric elements; and a flexible printed circuit electrically connected to each of the electrodes. The flexible printed circuit includes a plurality of wires that extend such that at least parts of the wires cross a direction perpendicular to an arrangement direction of the piezoelectric elements, and the plurality of wires are electrically connected to the respective electrodes of the piezoelectric elements at positions where at least parts of the wires cross the direction perpendicular to the arrangement direction of the piezoelectric elements.

Abstract: An endoscope apparatus having: an insertion portion extending along a longitudinal axis; a roller driven by a drive force to rotate around the longitudinal axis; and a cover member covering the roller, wherein the cover member has: a base layer having: an outer surface direction side; and an inner surface direction side arranged to contact the roller, wherein portions of the base layer covering the roller as the roller rotates around the longitudinal axis of the insertion portion elastically elongate in an outer surface direction of the insertion portion, and wherein the base layer has a secondary material being a first color at a first temperature range and a second color at a second temperature range; and an external coating layer formed on at least one of the outer surface direction side and the inner surface direction side of the base layer.

Abstract: A two-color molding die includes: a fixed primary die; a fixed secondary die; and a movable die. The fixed primary die includes a first concave portion. The movable die includes a second concave portion facing the first concave portion, and a core pin that protrudes from a base end surface of the second concave portion toward a base end surface of the first concave portion to form a tubular primary molding cavity between the core pin and the first concave portion and the second concave portion. The fixed secondary die includes a third concave portion configured to form a concave secondary molding cavity.