WO2017199838A1 - Unité d'imagerie - Google Patents

Unité d'imagerie Download PDF

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Publication number
WO2017199838A1
WO2017199838A1 PCT/JP2017/017842 JP2017017842W WO2017199838A1 WO 2017199838 A1 WO2017199838 A1 WO 2017199838A1 JP 2017017842 W JP2017017842 W JP 2017017842W WO 2017199838 A1 WO2017199838 A1 WO 2017199838A1
Authority
WO
WIPO (PCT)
Prior art keywords
imaging unit
substrate
resin material
spacer
cable
Prior art date
Application number
PCT/JP2017/017842
Other languages
English (en)
Japanese (ja)
Inventor
友貴治 牧野
村松　明
Original Assignee
オリンパス株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by オリンパス株式会社 filed Critical オリンパス株式会社
Priority to JP2017552193A priority Critical patent/JPWO2017199838A1/ja
Publication of WO2017199838A1 publication Critical patent/WO2017199838A1/fr

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    • 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
    • A61B1/04—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 combined with photographic or television appliances
    • A61B1/05—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 combined with photographic or television appliances characterised by the image sensor, e.g. camera, being in the distal end portion
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B23/00—Telescopes, e.g. binoculars; Periscopes; Instruments for viewing the inside of hollow bodies; Viewfinders; Optical aiming or sighting devices
    • G02B23/24—Instruments or systems for viewing the inside of hollow bodies, e.g. fibrescopes

Definitions

  • the present invention relates to an imaging unit in which a substrate in which an imaging unit is electrically connected to one surface is provided in a holding frame together with a resin material.
  • endoscopes are widely used in the medical field and the industrial field. Endoscopes used in the medical field can observe an organ serving as a test site in a body cavity by inserting an elongated insertion unit into a body cavity serving as a subject, and using an imaging unit included in the insertion unit. Accordingly, various treatments can be performed using the treatment tool inserted into the insertion channel of the treatment tool included in the endoscope.
  • an endoscope used in the industrial field is configured such that an elongated insertion portion of an endoscope is inserted into a subject such as a jet engine or a pipe of a factory so that the subject is captured by an imaging unit provided in the insertion portion. It is possible to observe and inspect the wound and corrosion of the test site inside.
  • the imaging unit includes an optical system, a so-called vertical-type imaging device that is an imaging unit that images a region to be examined via the optical system, and one surface electrically connected to the imaging device and an electronic component on the other surface.
  • the main part is configured to include a board on which is mounted, and a plurality of signal lines are electrically connected to one surface of the board and a cable for transmitting and receiving electrical signals to the board.
  • a configuration of an imaging unit in which a prism is provided behind the optical system in the optical axis direction (hereinafter, simply referred to as “backward”), and a so-called horizontal type imaging device images a region to be examined via the optical system and the prism. Is also well known.
  • the configuration of the imaging unit in which the imaging device is so-called horizontal and the imaging unit is composed of the prism and the imaging device is also well known. It is.
  • the distal end side in the optical axis direction of the optical system (hereinafter simply referred to as the distal end side) is fixed to the hard distal end member that holds the optical system, and noise enters the imaging element and the substrate.
  • a shield frame which is a holding frame made of a metal for preventing the image, and an image pickup unit and a substrate having an image pickup element in which a glass lid is attached to the light receiving surface are provided in the shield frame, and a plurality of pieces to the substrate are provided.
  • a configuration in which a connection portion of a signal line is located is well known.
  • heat shrink tubes made of resin are respectively fixed to the outer periphery of the shield frame in the optical axis direction (hereinafter simply referred to as the base end side) and the outer periphery of the cable distal end side. It is well known that the shield frame and the heat shrinkable tube are filled with a resin material made of epoxy or the like.
  • twisting force is also applied to the substrate.
  • twisting force is also applied to the image sensor that is electrically connected to the substrate, causing a problem that the glass lid is peeled off from the image sensor.
  • the twisting force from the cable to the image sensor increases as the connection positions of the plurality of signal lines to the image sensor move away in the optical axis direction.
  • Japanese Patent Application Laid-Open No. 2012-205808 discloses that the distal end side of an imaging unit, a substrate, and a cable including a prism and an imaging element is placed on the lower side (hereinafter simply referred to as the optical system)
  • a configuration is disclosed in which an imaging unit is provided with a reinforcing frame that covers a U-shape from the center of the optical system and offsets the center of the cable downward from the center of the optical system.
  • the reinforcing frame has a distal end side fixed to the distal end hard member and a proximal end side fixed to the distal end side of the cable.
  • Japanese Patent Application Laid-Open No. 2012-205808 discloses a configuration of an imaging unit that prevents a twisting force of a cable from being applied to a substrate by fixing the position of the front end side of the cable using a reinforcing frame. Is disclosed.
  • the reinforcing frame has a U-shape and covers the imaging unit, the board, and the front end side of the cable from below.
  • the upper side it is impossible to prevent a twisting force from being applied to the substrate from the cable when the cable is wound on the upper side in the radial direction of the optical system (hereinafter simply referred to as the upper side).
  • the resin material filled in the shield frame expands and contracts as the temperature changes. For example, before and after a high temperature environment such as an autoclave sterilization process of an endoscope, it expands and contracts greatly.
  • the cable is offset, and if the amount of the resin material in the shield frame is filled in the up and down direction in the radial direction, the twisting force from the resin material on the substrate becomes uneven. End up.
  • the present invention has been made in view of the above problems, and provides an imaging unit having a configuration in which the twisting force applied from the cable and the resin material to the substrate is reduced and the twisting force is uniformized.
  • the purpose is to do.
  • An imaging unit includes an imaging unit, a cable having a plurality of signal lines, and a substrate to which the imaging unit is electrically connected and the plurality of signal lines are electrically connected on one surface.
  • An auxiliary member disposed on the one surface of the substrate, a holding frame containing an assembly including the imaging unit, the substrate, and the auxiliary member, an outer peripheral surface of the assembly, and an inner peripheral surface of the holding frame
  • a second gap filled with the resin material, and the auxiliary member is made of a material having a lower expansion / contraction rate than the resin material. And the first gap and the second gap are the same There.
  • the perspective view which shows the endoscope system which equips the front-end
  • the fragmentary sectional view which shows schematically the structure of the imaging unit provided in the front-end
  • the fragmentary sectional view which shows roughly the structure of the imaging unit of 2nd Embodiment
  • the fragmentary sectional view which shows roughly the structure of the imaging unit of 3rd Embodiment
  • FIG. 1 is a perspective view showing an endoscope system including an imaging unit according to the present embodiment at the distal end portion of an insertion portion of an endoscope.
  • an endoscope system 1 includes an endoscope 2, a light source device 3, a video processor 4, and a monitor 5.
  • the endoscope 2 includes an elongated insertion portion 9 along an optical axis direction L, which will be described later, an operation portion 10 connected to the proximal end side of the insertion portion 9 via a bend stopper 11, and the operation portion 10.
  • the main part is constituted by the extended universal cable 17 and the connector 18 provided at the extended end of the universal cable 17.
  • the insertion portion 9 includes a distal end portion 6, a bending portion 7, and a flexible tube portion 8 in order from the distal end side, and a main portion is configured.
  • an imaging unit 100 is provided for imaging a region to be examined in the subject.
  • an opening 12 of a treatment instrument channel (not shown) through which various treatment instruments provided in the insertion section 9 are inserted is formed in the operation section 10 and is operated when the bending section 7 is bent.
  • the bending operation knob 16 is provided so as to be freely rotatable, and various endoscope operation switches (not shown) are provided.
  • the bending operation knob 16 includes a UD bending operation knob 14 that is operated when the bending portion 7 is bent in the vertical direction, and an RL bending operation knob 15 that is operated when the bending portion 7 is bent in the left-right direction.
  • the main part is composed of
  • the connector 18 is freely connectable to the light source device 3.
  • the endoscope 2 receives illumination light emitted from the light source device 3 via a light guide (not shown) inserted into the connector 18, the universal cable 17, the operation unit 10, and the insertion unit 9. It has the structure which supplies in a test object from the illumination lens which is provided in the front end surface.
  • a coil cable 19 extends from the connector 18, and an electrical connector 19 a that can be connected to the video processor 4 is provided at the extended end of the coil cable 19.
  • the video processor 4 is electrically connected to a monitor 5 that displays an endoscopic image, and performs signal processing on an electrical signal photoelectrically converted by an imaging device 33 (see FIG. 2) described later of the endoscope 2. , And has a function of outputting to the monitor 5 as an image signal.
  • FIG. 2 is a partial cross-sectional view schematically showing the configuration of an imaging unit provided in the distal end portion of the insertion portion in the endoscope of FIG.
  • the imaging unit 100 includes an optical system 20, an imaging unit 30, a substrate 40, a spacer 50 that is an auxiliary member, a shield frame 70 that is a holding frame, a resin material 80, and a plurality of members.
  • the cable 90 having the signal line 91 and the heat shrinkable tube 110 are provided to constitute a main part.
  • the optical system 20 is for observing a region to be examined in the subject, and is composed of one or a plurality of lenses.
  • the optical system 20 is shown in a simplified manner in order to simplify the drawing.
  • the optical system 20 is fixed to a distal end hard member 6s provided at the distal end portion 6 made of metal, for example, via a lens frame (not shown).
  • tip hard member 6s is not limited to a metal, You may be resin, such as a polysulfone and PEEK.
  • the imaging unit 30 includes a prism 31, a glass lid 32, and an imaging element 33, and a main part is configured.
  • the prism 31 is attached to the base end of the optical system 20 in the optical axis direction L (hereinafter simply referred to as the base end).
  • the prism 31 may be attached to the base end of the optical system 20 via a cover glass or the like (not shown). That is, a cover glass (not shown) may be attached to the incident end face of the prism 31, and the cover glass may be attached to the base end of the optical system 20.
  • the prism 31 changes the optical axis incident from the optical system 20 along the optical axis direction L to the lower direction in the radial direction R.
  • the glass lid 32 has one surface attached to the emission end face of the prism 31 and the other surface attached to the image sensor 33.
  • the image sensor 33 has one surface stuck to the glass lid 32 and the other surface electrically connected to one surface 40 i of the substrate 40. Therefore, the image sensor 33 is provided horizontally so that the longitudinal direction is along the optical axis direction L. Thus, the diameter in the radial direction R is reduced compared to the distal end portion 6 provided with the vertical type imaging device 33 ′ (see FIG. 6).
  • the imaging element 33 is for imaging a region to be examined via the optical system 20, the prism 31, and the glass lid 32, and is composed of, for example, a CCD or a CMOS.
  • the imaging element 33 is provided with an electronic circuit unit (not shown) including an amplifier such as a transistor.
  • the imaging element 33 is, for example, an electronic circuit unit packaged with a light receiving element (not shown).
  • the substrate 40 is made of TAB tape, ceramic, or the like, and the image sensor 33 is electrically connected to one surface 40i.
  • a plurality of signal lines 91 for transmitting / receiving electrical signals to / from the substrate 40 are electrically connected to a plurality of connection lands (not shown) formed on the one surface 40i of the substrate 40 by soldering or the like.
  • a cable 90 having a plurality of signal lines 91 is inserted into the insertion section 9, the operation section 10, the universal cable 17, and the connector 18, and is electrically connected to the video processor 4 through the coil cable 19. Yes.
  • a plurality of electronic components are mounted on one surface 40i of the substrate 40.
  • the electronic component may be mounted on the surface opposite to the one surface 40 i of the substrate 40.
  • the spacer 50 is disposed on one surface 40 i of the substrate 40. Specifically, the spacer 50 is disposed in a region A behind the prism 31 in the space B described later on the one surface 40 i of the substrate 40.
  • the spacer 50 is a material having a lower expansion / contraction rate than the resin material 80, that is, a material that is less likely to deform than the resin material 80, specifically, a material having a lower linear expansion coefficient than the resin material 80, Are made of a material having a high elastic modulus, a material having a glass transition point (TG point) higher than that of the resin material 80, and the like. More specifically, the surface is made of a metal such as SUS whose surface is insulated, a hard resin, glass, or the like.
  • the spacer 50 is formed in substantially the same length as the substrate 40 together with the prism 31 in the optical axis direction L, and is formed in substantially the same diameter as the imaging unit 30 in the radial direction R.
  • the spacer 50 is fixed to the distal end hard member 6s at the front end side, and the rear end side is bonded to the outer periphery on the front end side of the cable 90 via the resin material 80.
  • the spacer 50 may prevent the movement of the imaging unit 30 by covering the imaging unit 30 on the tip side.
  • the shield frame 70 includes an assembly 60 including the imaging unit 30, the substrate 40, and the spacer 50, and the distal end side is fixed to the distal end hard member 6s. That is, the shield frame 70 is composed of a cylindrical member that covers at least the imaging unit 30, the substrate 40, and the spacer 50 along the optical axis direction L.
  • the shield frame 70 is made of, for example, metal, and is for securing strength in addition to preventing noise and moisture from entering the image sensor 33 and the substrate 40.
  • the distal end side of the heat shrinkable tube 110 is fixed to the outer periphery of the shield frame 70, and the proximal end side is fixed to the outer periphery on the distal end side of the cable 90.
  • the resin material 80 is made of, for example, an epoxy adhesive, and is filled in the space B in the shield frame 70 and the heat shrinkable tube 110. As a result, the resin material 80 is filled between the outer peripheral surface 60 g of the assembly 60 and the inner peripheral surface 70 n of the shield frame 70.
  • the resin material 80 has a first gap R1 between the upper surface 50i of the spacer 50 and the inner peripheral surface 70n in the space B and a second gap R2 between the lower surface 40t and the inner peripheral surface 70n of the substrate 40. Is filled.
  • the configuration of the other imaging unit 100 is the same as the configuration of the conventional imaging unit.
  • the spacer 50 made of a material having a lower expansion / contraction rate than the resin material 80 is provided in the region A on the one surface 40i of the substrate 40. It was shown that it was provided.
  • the spacer 50 is arranged in the area A of the space B, the amount of the resin material 80 filled in the shield frame 70 can be reduced as compared with the case where the spacer 50 is not arranged. Therefore, the twisting force applied to the substrate 40 as the resin material 80 expands and contracts can be reduced as compared with the conventional case.
  • the spacer 50 is made of a material having a lower expansion / contraction rate than the resin material 80, it is less likely to expand / contract than the resin material 80 even before and after the high temperature environment.
  • the twisting force that is imparted can be reduced as compared with the resin material 80.
  • the first gap R1 and the second gap R2 in the radial direction R are shown to be set to be equal or substantially equal by the spacer 50.
  • the first gap R1 located above the substrate 40 in the space B includes the region A, and therefore the second gap located below the substrate 40. It will be significantly larger than R2.
  • the amount of the resin material 80 filled in the first gap R1 is larger than that of the resin material 80 filled in the second gap R2, and the resin material filled in the first gap R1.
  • the twisting force applied to the substrate 40 from 80 differs from the twisting force applied to the substrate 40 from the resin material 80 filled in the second gap R2. That is, the rolling force applied from the resin material 80 to the substrate 40 due to expansion and contraction becomes non-uniform.
  • the amount of the resin material 80 filled in the first gap R1 by the spacer 50 that makes the first gap R1 and the second gap R2 equal or substantially equal is the resin filled in the second gap R2. Since the amount is substantially equal to the amount of the material 80, the twisting force applied from the resin material 80 to the substrate 40 by expansion and contraction can be made uniform.
  • the spacer 50 is attached to the distal end side of the cable 90 through the resin material 80, so that the bending force applied from the cable 90 to the substrate 40 can be reduced.
  • the imaging unit 100 having a configuration in which the twisting force applied from the cable 90 and the resin material 80 to the substrate 40 is reduced and the twisting force is uniformized.
  • FIG. 3 is a partial cross-sectional view schematically showing the configuration of the imaging unit of the present embodiment.
  • the configuration of the imaging unit of the second embodiment is such that the spacer covers the tip end side of the cable as compared with the imaging unit of the first embodiment shown in FIGS. Is different.
  • the optical system 20 is shown in a simplified manner in order to simplify the drawing.
  • the spacer 250 that is an auxiliary member in the imaging unit 200 is a length that covers at least a part of the cable 90 in the optical axis direction L, for example, the outer periphery on the distal end side of the cable 90. Is formed.
  • the base end side portion 250 h of the spacer 250 is fixed to the cable 90 in a state where the outer periphery on the tip end side of the cable 90 is covered.
  • the distal end side of the cable 90 is fitted and fixed in a hole formed along the optical axis direction L in the proximal end portion 250 h of the spacer 250.
  • the first gap R1 that is equal to or substantially equal to the second gap R2 is set between the upper surface 250i of the spacer 250 and the inner peripheral surface 70n.
  • the other fixing configuration of the spacer 250 is the same as that of the first embodiment described above. Furthermore, the configuration of the other imaging unit 200 is the same as that of the first embodiment described above.
  • the volume of the spacer 250 is larger than that in the first embodiment, the amount of the resin material 80 filled in the space B is reduced.
  • the applied turning force can be reduced as compared with the first embodiment.
  • the spacer 250 is fixed so as to cover the distal end side of the cable 90, the cable 90 is difficult to move. Therefore, the twisting force applied to the substrate 40 from the cable 90 is greater than that in the first embodiment described above. Can be reduced.
  • FIG. 4 is a partial cross-sectional view schematically showing the configuration of the imaging unit of the present embodiment.
  • the configuration of the imaging unit of the third embodiment is different from that of the imaging unit of the first embodiment shown in FIGS. 1 and 2 described above in that the spacer has a substrate function.
  • the optical system 20 is shown in a simplified manner in order to simplify the drawing.
  • the spacer 350 which is an auxiliary member in the imaging unit 300, is electrically connected to the substrate 40 and has the function of a substrate.
  • connection lands are provided on the upper surface 350i of the spacer 350, and the signal lines 91 are electrically connected to the connection lands.
  • the first gap R1 equal to or substantially equal to the second gap R2 is set between the upper surface 350i of the spacer 350 and the inner peripheral surface 70n.
  • the other fixing configuration of the spacer 350 is the same as that of the first embodiment described above.
  • the work of electrically connecting the signal line 91 to the spacer 350 can be performed before the work of electrically connecting the spacer 350 to the substrate 40. Connection workability is improved.
  • the length of the substrate 40 in the optical axis direction L can be made shorter than that in the first embodiment by using the spacer 350 as the substrate, the twisting force applied from the cable 90 to the substrate 40 is described above. It can be made smaller than the first embodiment.
  • FIG. 5 is a partial cross-sectional view schematically showing the configuration of the imaging unit of the present embodiment.
  • the configuration of the imaging unit of the fourth embodiment is different from that of the imaging unit of the first embodiment shown in FIGS. 1 and 2 described above in that the spacer is fixed to the substrate.
  • the spacer 450 in the imaging unit 400 is fixed to the substrate 40.
  • the spacer 450 is fixed to the substrate 40 by fitting the convex portion 450t protruding from the lower surface of the spacer 450 into the concave portion 40k formed on the one surface 40i of the substrate 40.
  • the spacer 450 may be fixed to the substrate 40 by adhesion or the like.
  • the first gap R1 that is equal to or substantially equal to the second gap R2 is set between the upper surface 450i of the spacer 450 and the inner peripheral surface 70n.
  • the other fixing structure of the spacer 450 is the same as that of the first embodiment described above.
  • Other configurations are the same as those in the first embodiment described above.
  • the first gap R1 is set with high accuracy so as to be equal to the second gap R2. Therefore, the twisting force that is imparted from the resin material 80 to the substrate 40 along with the expansion and contraction can be reduced.
  • FIG. 6 is a partial cross-sectional view schematically showing the configuration of an image pickup unit having a vertically placed image pickup device.
  • the imaging unit 30 has the prism 31 and the imaging element 33 is shown as an example of the configuration of a horizontal type imaging unit.
  • the present invention is not limited to this, and the first to fourth embodiments described above can also be applied to an imaging unit in which the imaging unit does not have the prism 31 and the imaging element is of a vertical type.
  • the imaging unit 30 ′ includes a glass lid 32 ′ attached to the proximal end of the optical system 20.
  • the image sensor 33 ′ has a longitudinal direction attached to the glass lid 32 ′ extending along the radial direction R.
  • the imaging element 33 ′ is electrically connected to one surface 40 i of the substrate 40, and a spacer 50 ′ that is an auxiliary member is disposed in the area A of the one surface 40 i.
  • an assembly 60 ′ is configured by the imaging unit 30 ′, the substrate 40, and the spacer 50 ′, and the resin material 80 is provided between the outer peripheral surface 60g ′ and the inner peripheral surface 70n of the assembly 60. Is filled.
  • the first gap R1 is set between the upper surface 50i 'of the spacer 50' and the inner peripheral surface 70n.
  • the configuration of the spacer 50 ′ is substantially the same as the configuration of the spacer 50. That is, the spacer 50 'makes the first gap R1 equal or substantially equal to the second gap R2.
  • the configuration of the other imaging unit 100 ′ is the same as that of the imaging unit 100.
  • the same effect as that in the first embodiment can be obtained for the same reason as in the first embodiment described above.
  • each of the spacers 50, 250, 450, and 50 ′ is composed of one, and is elongated along the optical axis direction L.
  • the case where it is formed is shown as an example.
  • the spacers 50, 250, 450, and 50 ' may be divided into two parts before and after the optical axis direction.
  • the workability of fixing the spacers 50, 250, 450, and 50 'with respect to the substrate 40, the distal end hard member 6s, the cable 90, and the like can be improved as compared with the case of one.

Abstract

Une unité d'imagerie selon la présente invention est pourvue : d'une partie imagerie 30 ; d'un câble 90 ; d'un substrat 40 ; d'un espaceur 50 ; d'un cadre de protection 70 ; d'un matériau de résine 80 ; d'un premier espace vide R1 qui est formé entre l'espaceur 50 et une surface périphérique interne 70n et est rempli avec le matériau de résine 80 ; et d'un second espace vide R2 qui est formé entre le substrat 40 et la surface périphérique interne 70 et qui est rempli avec le matériau de résine 80. L'espaceur 50 est constitué d'un matériau ayant un taux de dilatation/rétrécissement inférieur à celui du matériau de résine 80 ; et le premier espace vide R1 et le second espace vide R2 sont égaux l'un à l'autre.
PCT/JP2017/017842 2016-05-17 2017-05-11 Unité d'imagerie WO2017199838A1 (fr)

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Application Number Priority Date Filing Date Title
JP2017552193A JPWO2017199838A1 (ja) 2016-05-17 2017-05-11 撮像ユニット

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JP2016098641 2016-05-17
JP2016-098641 2016-05-17

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WO2017199838A1 true WO2017199838A1 (fr) 2017-11-23

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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002159438A (ja) * 2000-11-24 2002-06-04 Olympus Optical Co Ltd 内視鏡用撮像ユニット
JP2012205807A (ja) * 2011-03-30 2012-10-25 Fujifilm Corp 内視鏡用撮像装置

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5467122B2 (ja) * 2012-05-14 2014-04-09 オリンパスメディカルシステムズ株式会社 撮像装置

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002159438A (ja) * 2000-11-24 2002-06-04 Olympus Optical Co Ltd 内視鏡用撮像ユニット
JP2012205807A (ja) * 2011-03-30 2012-10-25 Fujifilm Corp 内視鏡用撮像装置

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