Classifications

• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
  • A61B1/00—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
  • A61B1/00163—Optical arrangements
  • A61B1/00188—Optical arrangements with focusing or zooming features
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
  • A61B1/00—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
  • A61B1/00064—Constructional details of the endoscope body
  • A61B1/00071—Insertion part of the endoscope body
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
  • A61B1/00—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
  • A61B1/00064—Constructional details of the endoscope body
  • A61B1/00071—Insertion part of the endoscope body
  • A61B1/0008—Insertion part of the endoscope body characterised by distal tip features
  • A61B1/00096—Optical elements
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
  • A61B1/00—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
  • A61B1/00064—Constructional details of the endoscope body
  • A61B1/0011—Manufacturing of endoscope parts
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
  • A61B1/00—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
  • A61B1/00112—Connection or coupling means
  • A61B1/00114—Electrical cables in or with an endoscope
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
  • A61B1/00—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
  • A61B1/00064—Constructional details of the endoscope body
  • A61B1/00071—Insertion part of the endoscope body
  • A61B1/0008—Insertion part of the endoscope body characterised by distal tip features

Definitions

• the invention relates to an endoscope having a distal electrical feedthrough, comprising an endoscope shaft with a distally arranged objective unit, which comprises an electromagnetic actuator and a distal optical assembly displaceable by the actuator in a longitudinal direction of the endoscope shaft, and a proximal unit with a light direction behind the distal one the optical unit rotatable about a longitudinal axis of the endoscope shaft relative to the proximal unit and after assembly relative to the proximal unit is fixed against rotation, wherein at least one cable for powering the actuator from the proximal unit to Lens unit is guided.
• the invention further relates to a method for mounting an endoscope with distal electrical feedthrough.
• elements present at the tip of the endoscope end of the endoscope are, for example, electromagnetic actuators which can displace a part of the lens groups of the lens system of the endoscope in order, for example, to effect an adjustment of the focus region.
• Known in endoscopes used electromagnetic actuators have a coil whose coil wire at a fixed point has its outlet and inlet.
• the coil wire In order to operate the actuator with the greatest possible efficiency and thus to enable the greatest possible degree of miniaturization, the coil wire must be passed through a small opening on a pole shoe or through a magnet. As a result, the coil wire is fixed in its position.
• the coil wire must be electrically connected to a proximal arranged control device, for example with a part of the image sensor unit or CCD unit. With a direct connection, it is no longer possible to rotate the lens relative to the CCD without shearing the coil wires. It is also important that the coil wires are already connected to the CCD unit during the turning process so that the actuator can be operated and thus the recorded image can be fully evaluated.
• the present invention is therefore based on the object to provide an electrical feedthrough to an objective unit of an endoscope, with which it is possible to adjust an optimal Jardinqual ity during assembly.
• an endoscope having a distal electrical feedthrough comprising an endoscope shaft with a distally arranged objective unit, which comprises an electromagnetic actuator and a distal optical assembly which can be displaced by means of the actuator in a longitudinal direction of the endoscope shaft, and a proximal unit with a Light direction behind the distal optical assembly arranged proximal optical assembly, wherein the lens unit is rotatable during assembly of the endoscope about a longitudinal axis of the endoscope shaft relative to the proximal unit and fixed after rotation with respect to the proximal unit, wherein at least one cable for powering the actuator of the proximal unit is guided to the lens unit, which is further developed in that the cable has an excess length at the transition from the proximal unit to the lens unit, the at least a half, esp special is at least a full, outer circumference of the lens unit.
• This solution according to the invention is based on the basic idea that the electrical leadthrough is kept flexible in rotation by giving an excess length of the cable which allows rotation of the objective unit relative to the proximal unit during assembly of the endoscope while the electrical connection is already established.
• the optical alignment of the objective unit to the proximal unit also counts for mounting the endoscope. In this way it is possible, to judge the optimal image quality, while the lens unit is rotated relative to the proximal unit, which optionally includes the image sensor.
• the excess length of the cable which is designed to be flexible, compensates for the rotation of the objective unit relative to the proximal unit due to its deformation during the rotation.
• the lens unit and the proximal unit are usually held in a common holder, the rotation during rotation of one or both units against each other and zusl I lution, eg by gluing or by mechanical fixation means such as screws or rings. Other suitable fixatives or methods are applicable.
• the excess length is at least half an outer circumference of the lens unit, around which the excess length of the cable is wound up and is. This allows a rotation of ⁇ 1 80 ° so a total of 360 °. For safety, another small addition makes sense. During rotation, the cable wraps around the lens unit accordingly.
• the excess cable can be placed in a loop around the lens or the lens unit. This is useful not only for a rotational, but also for a translational alignment of the objective unit and the proximal unit.
• the aligned combination of objective unit and proximal unit can then be introduced into a cladding tube or first inserted into the cladding tube and be aligned.
• a peripheral groove is arranged between the lens unit and the proximal unit, in which the excess length of the cable extends, wherein the groove has a cross-sectional area which corresponds to at least three times, in particular more than five times, the cross-sectional area of the cable and a height which corresponds at least to the thickness of the cable.
• the groove provides the cable in both the height or depth and the entire cross-sectional area enough space to open and unwind and optionally perform a 1 80 ° turn.
• the lens unit during assembly of the endoscope by at least ⁇ 1 80 °, in particular by at least 360 °, relative to the proximal unit rotatable.
• rotation limit stops are advantageously present which limit a maximum rotation of the objective unit relative to the proximal unit to the excess length of the cable.
• These rotation limiting stops are preferably located both on the optical unit and on the proximal unit, in a further advantageous embodiment on the optical unit and an enclosing tube, in which the optical unit and the proximal unit are introduced. These are preferably projections that represent a positive boundary.
• the objective unit is also displaceable relative to the proximal unit in the longitudinal direction of the endoscope shaft.
• the proximal unit has at least one image sensor and a control and read-out electronics, wherein in particular by means of the cable, the actuator is connected to the control and read-out electronics.
• the control of the electromagnetic actuator takes place in this case from the control and read-out electronics of the proximal unit.
• the object underlying the invention is also achieved by a method for assembling an endoscope with a distal electrical feedthrough, comprising an endoscope shaft with a lens assembly, which surrounds an electromagnetic actuator and a distal optical assembly which is displaceable by means of the actuator in a longitudinal direction of the endoscope shaft and a proximal unit having a proximal optical assembly positioned in the light incident direction behind the distal optical assembly, the objective unit being rotatable about a longitudinal axis of the endoscope shaft relative to the proximal unit, at least one cable for powering the actuator from the proximal unit to the lens unit is guided, in particular a previously described endoscope according to the invention, with the following method steps: a) the cable is at the transition from the proximal unit to the lens unit with an excess length, the we b) for setting an optimal optical image reproduction, the objective unit is rotated relative to the proximal unit about the longitudinal axis of the endoscope shaft, wherein: at least half, in particular
• the endoscope according to the invention is mounted, whereby the method likewise realizes the advantages, properties and features mentioned for the aforementioned endoscope according to the invention.
• step a) the excess length of the cable in a circumferential groove verse kt having a cross-sectional area which corresponds to at least three times, in particular more than five times, the cross-sectional area of the cable, and a height which corresponds at least to the thickness of the cable ,
• the cable with its excess length is wound around the lens unit and unwound in step c) during rotation of the lens unit from its maximum wrapped position.
• the wire or the cable is already wrapped around the lens unit before alignment. Depending on the desired design, this can be done by at least half the circumference of the lens unit for an alignment of ⁇ 1 80 ° or at least once around the entire circumference for an orientation of 360 °.
• the rotation now takes place against the winding sense, so that the cable is unwound. If such a large angle of rotation is required that the cable has been unwound heavily or completely, this can also be placed in a loop around the lens unit.
• step a) the cable with its excess length is first inserted into the groove without wrapping the lens unit.
• the rotation of the lens unit is preferably limited before reaching a maximum deflection of the excess length of the cable.
• the objective unit is also displaced in the longitudinal direction of the endoscope shaft relative to the proximal unit.
• the objective unit is preferably introduced into an enveloping tube together with the proximal unit and the cable before or after method step b).
• Fig. 1 shows, in cross-section, schematically the distal region of an endoscope shaft 4 of an endoscope 2 according to the invention.
• the endoscope shaft 4 is elongated along a longitudinal axis 6.
• beam paths 8, 8 ', 8 are drawn through the different lens groups of the endoscope 2. These enter from the left through an entrance window 22 into a first lens group with the lenses 24', 24", 24 '", 24 IV through a second lens group with the lenses 24 v , 24 VI , 24 v ", 24 vm further directed toward an image sensor 56 protected by light transmission window 54 1 , 54".
• This is connected to a control and read-out electronics 58, which controls the image acquisition and evaluation.
• the lenses 24 1 to 24 VI "form the lens groups of an objective unit 20, which are held in a lens barrel 26 of the lens unit 20.
• an electromagnetic actuator 30 comprising a coil 32, two permanent magnet rings 34, 35 and Joch 36 on the outside of the objective tube 26 and a rotor 38 on the inside of the objective tube 26 which is in operative operative connection with the outer parts of the actuator 30 and by energizing and non-energizing the coil 32 in two end positions is displaceable are defined by a distal stop 40 and a proximal stop 42, which are disposed on a holder 28 for the foremost lens group of the lens unit 20 and on the objective tube 26 itself, respectively, and another holder 29 holds the entrance window 22.
• the proximal unit 50 comprises the light passage windows 54 1 , 54 ", an image sensor 56 and a control and read-out electronics 58.
• an electrical feedthrough 1 0 schematically shown, comprising a cable 1 2, which has an excess length 14 and is arranged with its excess length 14 in a groove 1 8, where it Turn 1 6 around the outer periphery of the objective unit 20 or the groove 1 8 describes.
• the excess length is 360 ° of the outer circumference of the lens unit 20 or more.
• the cable 1 2 ends in the coil 32 of the actuator 30.
• the groove 1 8 provides the cable 1 2 enough space to unwind with a rotation of the lens unit 20 relative to the proximal unit 50 about the longitudinal axis 6 of the endoscope shaft 4.

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• Health & Medical Sciences (AREA)
• Life Sciences & Earth Sciences (AREA)
• Surgery (AREA)
• Engineering & Computer Science (AREA)
• Biomedical Technology (AREA)
• Molecular Biology (AREA)
• Pathology (AREA)
• Radiology & Medical Imaging (AREA)
• Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
• Biophysics (AREA)
• Physics & Mathematics (AREA)
• Heart & Thoracic Surgery (AREA)
• Medical Informatics (AREA)
• Optics & Photonics (AREA)
• Animal Behavior & Ethology (AREA)
• General Health & Medical Sciences (AREA)
• Public Health (AREA)
• Veterinary Medicine (AREA)
• Manufacturing & Machinery (AREA)
• Endoscopes (AREA)
• Instruments For Viewing The Inside Of Hollow Bodies (AREA)

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• 2014
  • 2014-03-14 DE DE102014204784.6A patent/DE102014204784A1/de not_active Withdrawn
• 2015
  • 2015-03-13 CN CN201580013462.XA patent/CN106102547B/zh not_active Expired - Fee Related
  • 2015-03-13 JP JP2016557310A patent/JP6469129B2/ja not_active Expired - Fee Related
  • 2015-03-13 WO PCT/EP2015/055258 patent/WO2015136064A1/de not_active Ceased
• 2016
  • 2016-09-13 US US15/263,601 patent/US10278565B2/en active Active

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