JP2011200428A - Endoscope - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an endoscope device capable of preventing excessive heating of the distal end of an insertion part of an endoscope without impairing the flexibility of the insertion part, and to provide the endoscope device having a bending part in the insertion part, capable of preventing reduction of the bending force and the bending angle of the bending part.SOLUTION: The endoscope device 1 includes a built-in imaging means 30 and a built-in illumination means 31 at the distal end 6 of the insertion part 2. Carbon fiber 40 is disposed in spaces among built-in members 27, 29, 30, 31 and 34 within the distal end 6, and the carbon fiber 40 is extended toward the rear side of the insertion part 2.

Description

  The present invention relates to an endoscope apparatus that includes an insertion portion that is inserted into a body, and more particularly, to a distal end portion of the insertion portion that includes a heat generation unit such as an illumination unit.

  As is well known, an endoscopic device of a medical device includes an imaging device that is an imaging means, and is introduced into a body cavity of a patient, and an examination image taken by the imaging device is used to perform various examinations on an affected area in the body. It is for performing various treatments. Endoscopic devices are luminal channels of the body, digestive system such as esophagus, stomach, large intestine, duodenum, urinary system such as urethra, ureter, bladder, or respiratory system such as trachea, lungs, etc. In order to observe the inside, there are those that introduce the insertion portion from the oral cavity, anus, urethral entrance, and others, and those that pierce and penetrate the body wall from the vicinity of the umbilicus and introduce it into the abdominal cavity.

  Such an endoscope apparatus has an imaging unit and an illumination unit in the distal end portion. The solid-state imaging device and the illumination unit generate heat by driving the video processor, the light source device, and the like, so that the imaging unit and the illumination unit generate heat. Thereby, when the endoscope apparatus is used, heat from the imaging unit and the illuminating unit is transmitted to the distal end portion, so that the distal end portion may become high temperature. Therefore, an operator who operates the endoscope apparatus, a patient whose insertion unit is introduced into the body, and the like may feel heat.

  Assuming such a case, the endoscope apparatus disclosed in Patent Document 1, for example, arranges the tip of a metallic bundle member at the tip so as not to increase the temperature around the tip. And the technique which transmits the heat which arises in a front-end | tip part toward the rear-end side of an insertion part by a bundle member is proposed.

JP 2004-248835 A

  However, when a metallic bundle member is provided on the rear end side of the insertion portion as in a conventional endoscope device, in an endoscope device having a bending portion in the insertion portion, the bending portion is curved. In addition to increasing the amount of force, there is a problem that it is easy to cause a decrease in the bending angle of the bending portion. In addition, the insertion portion itself has a problem that flexibility is hindered by the metallic bundle member.

  Therefore, the present invention has been made in view of the above problems, and an object of the present invention is to provide an endoscope apparatus that prevents high temperature at the distal end portion without hindering flexibility of the insertion portion. That is. In addition, when the endoscope device has a bending portion in the insertion portion, it is an object to provide an endoscope device that prevents the amount of force that the bending portion bends and the bending angle from decreasing.

  In order to achieve the above object, an endoscope apparatus according to the present invention is an endoscope apparatus in which an imaging means and an illumination means are incorporated in a distal end portion of an insertion portion, and a carbon portion is provided in a space portion between built-in objects in the distal end portion. A fiber was disposed, and the carbon fiber was extended to the rear side of the insertion portion.

  According to the endoscope of the present invention, it is possible to prevent the distal end portion from becoming hot without impairing the flexibility of the insertion portion. Furthermore, in an endoscope apparatus having a bending portion in the insertion portion, it is possible to prevent a decrease in the amount of force and bending angle of the bending portion.

The figure which shows the structure of the endoscope apparatus concerning the 1st Embodiment of this invention. The front view which shows the structure of the front-end | tip part of an insertion part similarly FIG. 2 is a cross-sectional view taken along the line III-III in FIG. FIG. 2 is a cross-sectional view taken along the line IV-IV in FIG. The perspective view which shows the structure of a carbon fiber bundle unit same as the above Sectional view taken along line VI-VI in FIGS. 3 and 4 Sectional drawing which shows the structure of the front-end | tip part of an insertion part, and a bending part concerning 2nd Embodiment of this invention. Sectional drawing which shows the structure of the front-end | tip part of the insertion part of a modification, and a bending part similarly Sectional drawing which shows the structure of the front-end | tip part of an insertion part, and a bending part concerning the 3rd Embodiment of this invention. XII-XII sectional view of FIG. The perspective view which concerns on the 4th Embodiment of this invention and shows the structure of a light guide bundle. The perspective view for demonstrating an example of arrangement | positioning of a carbon fiber and a light guide fiber similarly Sectional drawing which shows the structure of the front-end | tip part of an insertion part, and a bending part concerning the 5th Embodiment of this invention. Sectional drawing which shows the structure of the imaging unit concerning the 6th Embodiment of this invention. Sectional drawing which shows the structure of the front-end | tip part according to the 7th Embodiment of this invention.

Hereinafter, an endoscope apparatus of the present invention will be described with reference to the drawings. In the following description, the drawings based on each embodiment are schematic, and the relationship between the thickness and width of each part, the thickness ratio of each part, and the like are different from the actual ones. It should be noted that the drawings may include portions having different dimensional relationships and ratios between the drawings.
(First embodiment)
First, a first embodiment of an endoscope apparatus according to the present invention will be described with reference to FIGS.
1 to 6 relate to a first embodiment of the present invention, FIG. 1 is a diagram showing a configuration of an endoscope apparatus, FIG. 2 is a front view showing a configuration of a distal end portion of an insertion portion, and FIG. 3 is an insertion portion. 2 is a cross-sectional view taken along the line III-III in FIG. 2, FIG. 4 is a cross-sectional view taken along the line IV-IV in FIG. 2, and FIG. 5 is a cross-sectional view taken along the line IV-IV in FIG. The perspective view which shows the structure of a carbon fiber bundle unit, FIG. 6 is VI-VI sectional drawing of FIG. 3 and FIG.

  An endoscope apparatus 1 shown in FIG. 1 includes an insertion portion 2, an operation portion 3 connected to the proximal end of the insertion portion 2, and a universal cord 4 that is a composite cable extending from the operation portion 3. The light source connector 5 a disposed at the end of the universal cord 4 and the electrical connector 5 b extending from the light source connector 5 are provided.

  The insertion portion 2 is a flexible tube body in which a distal end portion 6, a bending portion 7, and a flexible tube portion 8 are connected in order from the distal end (front). The operation unit 10 includes, in order from the distal end (front), a breakage prevention unit 11 connected so as to cover the proximal end portion of the flexible tube unit 8, and a treatment instrument insertion portion provided with a treatment instrument insertion port 13a described later. 13 and a plurality of switches 16 for performing various optical system operations such as an operation of a bending lever 15, an air supply, a water supply, and a suction, or an imaging unit and an illumination unit provided at the distal end 6, And a main operation portion 14 provided with a detachable and replaceable suction valve 17.

  An image signal photoelectrically converted by an imaging unit (to be described later) having a built-in CCD or CMOS imaging element for imaging tissue inside the body is electrically connected to the distal end portion 6 of the insertion portion 2 via the universal cord 4. The data is output to a video processor (not shown) that is detachably connected to the connector 5b. Note that a monitor (not shown) for displaying an endoscopic image is connected to the video processor.

  In the present embodiment, a light guide bundle (not shown) is inserted from the distal end portion 6 of the insertion portion 2 to the universal cord 4. The light guide bundle guides the illumination light emitted from the light source in the light source device, so that the endoscope device 1 emits the illumination light transmitted from the distal end portion 6 toward the subject.

  The endoscope apparatus 1 is a type in which the bending portion 7 is bent in two directions, ie, the up and down direction, and the bending portion 7 is bent up and down (UP-DOWN) by the turning operation of the bending lever 15 provided in the operation portion 3. Is done. The endoscope apparatus 1 is not limited to a type in which the bending portion 7 is bent in only two directions, ie, up and down, but in four directions including left and right (depending on the up and down and left and right operations, the entire circumference around the axis). A curved type may be used.

Next, the internal configuration of the distal end portion of the insertion portion 2 of the endoscope apparatus 1 will be described below based on FIGS.
As shown in FIG. 2, an objective lens 21 serving as an imaging window, an illumination lens 22 serving as an illumination window, and an opening of the treatment instrument channel 23 are disposed on the distal end surface of the distal end portion 6.

  As shown in FIGS. 3 and 4, the distal end portion 6 includes a distal end hard portion 20 that is a metal block body, and a metal hard tube 20 a fitted behind the distal end hard portion 20. The distal end hard portion 20 and the hard tube 20a are integrally covered with the outer skin 37.

  A pincushion bonding portion 38 is formed on the outer periphery of the outer end of the outer skin 37 that overlaps with a portion where the distal end hard portion 20 and the hard tube 20a are overlapped and fitted. It is fixed to the hard part 20.

  A lens unit including a lens holding frame 24 held by the plurality of objective optical systems 25 together with the objective lens 21 is fitted to the distal end hard portion 20. An imaging unit 30 that constitutes imaging means is disposed behind the lens unit. Note that a cable 34 for transmitting and receiving a control signal such as an imaging signal extends from the imaging unit 30. The cable 34 is disposed in the endoscope apparatus 1 up to the electrical connector 5b (see FIG. 1). The imaging unit 30 is a heat generating element in the insertion unit 2.

  The hard tube 20a has an outer skin 37 attached to the rear outer periphery thereof. A bending piece 35 is inserted and fixed to the rear end of the hard tube 20a. A plurality of bending pieces 35 are provided in the bending portion 7, and adjacent ones are rotatably connected by a pivot member 36.

  Further, the distal end hard portion 20 has an opening at the distal end, and the tube connecting tube 26 is inserted and fixed in the opening. The tube connecting pipe 26 is connected so that a channel tube 27 for inserting a treatment instrument covers a rear outer peripheral portion. With such a configuration, the above-described treatment instrument channel 23 is disposed in the insertion portion 2.

  The bending portion 7 is formed by covering the outer periphery 37 of the plurality of bending pieces 45 connected in a freely rotatable manner with the above-described outer skin 37 including the above-described net tube (not shown) as a bending rubber, and inserting the endoscope device 1 into the bending portion 7. The flexible part in the part 2 is comprised.

Further, a light guide bundle 31 that is inserted through the metal holding tube 28 is disposed behind the illumination lens 22 in the distal end hard portion 20. The light guide bundle 31 is an illumination unit that transmits illumination light in which a plurality of fiber fibers are bundled. The metal holding tube 28 is connected so that a resin sheath 29 into which the light guide bundle 31 is inserted covers the rear outer peripheral portion.
In addition, the light guide bundle 31 is arrange | positioned in the endoscope apparatus 1 to the light source connector 5a (refer FIG. 1). In addition, the light guide bundle 31 is a heating element in the insertion portion 2, like the imaging unit 30, because irradiation light heat is generated by irradiating the illumination lens 22 that refracts the transmitted illumination light.

  In the distal end portion 6 and the bending portion 7, the imaging unit 30 including the cable 34, the light guide bundle 31 covered with the resin sheath 29, and the channel tube 27 constituting the treatment instrument channel 23 are disposed around the periphery of the channel tube 27. As shown in FIGS. 5 and 6, the carbon fiber bundle unit 40 is provided up to a position where the proximal end surface of the distal end hard portion 20 and the distal end are in contact with each other. The carbon fiber bundle unit 40 may extend along the insertion axis of the insertion portion 2 up to the inside of the distal end portion of the flexible tube portion 8 after the bending portion 7 or within the entire length.

  The carbon fiber bundle unit 40 has a plurality of carbon fibers 40a arranged in a state where the tip portions are bundled in the hard tube 20a. The distal end surfaces of the plurality of carbon fibers 40a are arranged in a state shifted from the distal end surface of the hard tube 20a toward the proximal end side.

  The bundled carbon fibers 40 a are provided with an imaging unit 30 including a cable 34, a light guide bundle 31 covered with a resin sheath 29, and a channel tube 27 constituting the treatment instrument channel 23. Three holes 42, 43, and 44 are formed.

  These three holes 42, 43, 44 are formed in advance in accordance with the outer shapes of the imaging unit 30, the cable 34, the light guide bundle 31, and the channel tube 27. Thereby, the assembly | attachment property to the front-end | tip part of the insertion part 2 improves the carbon fiber bundle unit 40. FIG.

That is, the imaging unit 30, the cable 34, the light guide bundle 31, and the channel tube 27 are covered with a plurality of carbon fibers 40 a inside the distal end portion 6 and the bending portion 7.
In addition, it is more desirable that the distal end surfaces of the plurality of carbon fibers 40a are in contact with the proximal end surface of the distal end hard portion 20 and are connected by an adhesive or the like. Although the plurality of carbon fibers 40a are described as being disposed in the hard tube 20a, the carbon fibers 40a are not limited to this, and are disposed in a bundle in another connection tube and connected within the distal end portion 6. A configuration in which the tube is fitted and fixed may be used.

  Further, the carbon fiber 40a of the present embodiment uses, for example, pitch-based carbon fiber having a diameter of 10 μm and high thermal conductivity so as not to affect the bending variable characteristics of the bending portion 7. It has been. This pitch-based carbon fiber has a thermal conductivity of about 2 to 3 times that of copper (about 370 W / m · k) and about 4 to 5 times that of aluminum (about 200 W / m · k). (About 900 W / m · k). The carbon fiber 40a is not limited to the pitch-based carbon fiber, and may of course be a PAN-based carbon fiber.

  As described above, the endoscope apparatus 1 according to the present embodiment is provided between the built-in components such as the imaging unit 30, the cable 34, the light guide bundle 31, and the channel tube 27 in the distal end portion 6 and the bending portion 7. The carbon fiber bundle unit 40 in which a plurality of carbon fibers 40a are filled in the gap is provided.

  Therefore, in the endoscope apparatus 1, the driving heat of the imaging unit 30 generated in the distal end portion 6 and the irradiation light heat by the illumination light transmitted by the light guide bundle 31 are rearward of the insertion portion 2 by the carbon fiber bundle unit 40. Heat is transferred to the side, that is, the curved portion 7 side.

  By configuring the endoscope apparatus 1 in this manner, it is possible to suppress the high temperature of the distal end portion 6 due to driving heat of the imaging unit 30 and irradiation light heat from illumination light. Furthermore, the carbon fiber bundle unit 40 disposed in the distal end portion 6 and the bending portion 7 has a plurality of spaces (spaces) in the distal end portion 6 and other built-in objects disposed in the bending portion 7. Since the structure is filled with the carbon fiber 40a, the outer diameter of the distal end portion 6 and the bending portion 7 is not increased, and it is effective for reducing the diameter required for the endoscope apparatus 1.

  Further, each of the plurality of carbon fibers 40a constituting the carbon fiber bundle unit 40 is a flexible ultrafine fiber having a diameter of, for example, 10 μm, and the insertion portion 2 includes the bending portion 7 as in the present embodiment. In the endoscope apparatus 1, since the connecting pipe 41 is not covered in the bending portion 7, the bending operation of the bending portion 7 can be prevented from being affected. Even if the carbon fiber bundle unit 40 is the endoscope apparatus 1 that does not include the bending portion 7 in the insertion portion 2, the flexibility of the flexible portion (flexible tube portion 8) immediately after the distal end portion 6 is improved. There is no hindrance.

  As described above, the endoscope apparatus 1 according to the present embodiment prevents the distal end portion 6 from being heated at a high temperature and does not hinder the flexibility of the insertion portion 2, in particular, the bending characteristics of the bending portion 7. It is also possible to prevent the amount of bending force and the bending angle from decreasing.

(Second Embodiment)
Next, an endoscope apparatus 1 according to a second embodiment will be described below based on FIGS. 7 and 8.
7 and 8 relate to the second embodiment of the present invention, FIG. 7 is a cross-sectional view showing the configuration of the distal end portion and the bending portion of the insertion portion, and FIG. 8 is a modification of the insertion portion. It is sectional drawing which shows the structure of a front-end | tip part and a bending part. In the following description, the same components as those in the first embodiment are denoted by the same reference numerals for the sake of convenience of description, and detailed descriptions and operational effects of those components are omitted. The configuration of the present embodiment may be implemented in combination with the configuration of the first embodiment.

  As shown in FIG. 7, the endoscope apparatus 1 of the present embodiment includes an imaging unit 30, a cable 34 extending from the imaging unit 30, and a light guide bundle 31 at the distal end portion 6 and the bending portion 7. A carbon fiber net 47 formed in a tube-like net shape is covered around each of the resin sheaths 29 covering the glass. Each carbon fiber net 47 has an adhesive portion 46 that is closely fixed to the outer surface of the imaging unit 30 or the resin sheath 29 at the tip portion.

  Further, the carbon fiber network 47 is formed by using a plurality of pitch-based carbon fibers having high thermal conductivity and the like by braiding the plurality of pitch-based carbon fibers, as in the first embodiment. . The carbon fiber net 47 may cover the entire length of the cable 34 extending from the imaging unit 30 and the resin sheath 29 that covers the light guide bundle 31.

  Even with such a configuration, the endoscope apparatus 1 inserts the driving heat of the imaging unit 30 generated in the distal end portion 6 and the irradiation light heat by the illumination light transmitted by the light guide bundle 31 through the carbon fiber network 47. Heat is transferred to the rear side of the portion 2 to prevent the tip portion 6 from being heated at a high temperature, and the carbon fiber net 47 is simply covered with the cable 34 and the light guide bundle 31. It can be made to have no effect.

  As a result, the endoscope apparatus 1 according to the present embodiment also prevents the high temperature of the distal end portion 6, which is the same effect as the first embodiment, and the flexibility of the insertion portion 2, in particular, the bending portion. It is also possible to prevent a decrease in the amount of bending force and the bending angle of the bending portion 7 without hindering the bending characteristics of the bending portion 7.

  The carbon fiber net 47 is a resin sheath that covers the imaging unit 30, the cable 34 extending from the imaging unit 30, and the light guide bundle 31 in advance before the imaging unit 30 and the light guide bundle 31 are assembled. 29 can be coated around. Therefore, the assembling property of the imaging unit 30 and the light guide bundle 31 to the distal end portion 6 of the insertion portion 2 is improved.

As shown in FIG. 8, the endoscope apparatus 1 may have a configuration in which a carbon fiber net 49 formed in a tube-like net shape is stacked on the inner surface side of the outer skin 37 so as to overlap. That is, in the distal end portion 6 and the bending portion 7, the outer peripheral portions of the plurality of bending pieces 35 are covered with the carbon fiber net 49 from the middle of the hard tube 20 a, and the carbon fiber net 49 is covered with the outer skin 37. The tip end portion of the carbon fiber net 49 is fixed to the outer peripheral portion of the hard tube 20a by an adhesive portion 48.
Note that the carbon fiber net 49 may also be provided in the flexible tube portion 8 and disposed substantially the entire length of the insertion portion 2.

  Even with such a configuration, the endoscope apparatus 1 transmits the driving heat of the imaging unit 30 generated in the distal end portion 6 and the irradiation light heat from the illumination light transmitted by the light guide bundle 31 to the carbon fiber network 49. Since it is heated and the heat moves to the rear side, it is possible to prevent the tip portion 6 from becoming hot.

(Third embodiment)
Next, an endoscope apparatus 1 according to a third embodiment will be described below based on FIGS. 9 and 10.
9 and 10 relate to the third embodiment of the present invention, FIG. 9 is a cross-sectional view showing the configuration of the distal end portion and the bending portion of the insertion portion, and FIG. 10 is XII-XII in FIG. It is sectional drawing. In the following description, the same components as those in the first embodiment are denoted by the same reference numerals for the sake of convenience of description, and detailed descriptions and operational effects of those components are omitted. The configuration of the present embodiment may be implemented in combination with the configuration of the first and second embodiments.

  As shown in FIGS. 9 and 10, the endoscope apparatus 1 according to the present embodiment extends from the distal end portion 6 to the inside of the bending portion 7, and one side portion and the distal end portion of the imaging unit 30 are bonded portions. A first carbon fiber bundle cable 52 fixed by 51 and a plurality of (here, three) second carbon fiber bundle cables 54 each having a distal end connection portion 53 fitted and fixed to the proximal end surface of the distal end hard portion 20. Yes.

  Each of these carbon fiber bundle cables 52 and 54 is made of a plurality of pitch-based carbon fibers having a high thermal conductivity, and the plurality of pitch-based carbon fibers are bundled and bonded in the same manner as in the first embodiment. The rear portion excluding the portion 51 or the tip connection portion 53 is covered with a resin tube.

  If comprised in this way, the 1st carbon fiber bundle cable 52 will carry out the heat transfer of the drive heat of the imaging unit 30 heat-transferred from the adhesion part 51 to the back side of the insertion part 2, ie, the curved part 7 side. Then, the three second carbon fiber bundle cables 54 transmit the heat of the irradiation light generated by the illumination light transmitted by the light guide bundle 31 from the tip connection part 53 to the illumination lens 22 and transferred to the hard tip part 20. The heat moves to the rear side of the insertion portion 2, that is, to the bending portion 7 side.

  Thus, the endoscope apparatus 1 inserts the driving heat of the imaging unit 30 generated in the distal end portion 6 and the irradiation light heat by the illumination light transmitted by the light guide bundle 31 by the carbon fiber bundle cables 52 and 54. Since heat is transferred to the rear side of 2, the tip portion 6 can be prevented from increasing in temperature.

(Fourth embodiment)
Next, an endoscope apparatus 1 according to a fourth embodiment will be described below based on FIG. 11 and FIG.
11 and 12 relate to the fourth embodiment of the present invention, FIG. 11 is a perspective view showing the configuration of the light guide bundle, and FIG. 12 explains an example of the arrangement of the carbon fibers and the light guide fibers. It is a perspective view for doing. In the following description, the same components as those in the first embodiment are denoted by the same reference numerals for the sake of convenience of description, and detailed descriptions and operational effects of those components are omitted. The configuration of the present embodiment may be implemented in combination with the configurations of the first to third embodiments.

  As shown in FIG. 11, in the endoscope apparatus 1 of the present embodiment, a carbon fiber net 47 having the same configuration as that of the second embodiment is provided between the light guide bundle 31 and the resin sheath 29. Yes. Note that the carbon fiber net 47 is provided so as to cover the light guide bundle 31 only in the length range arranged at the distal end portion 6 and the curved portion 7, or covers the entire length of the light guide bundle 31. It may be provided as follows.

  Furthermore, as shown in FIG. 12, a plurality of carbon fibers 40a mixed in a light guide fiber 31a, which is a plurality of single-core fibers that transmit illumination light, are inserted into the light guide bundle 31. The light guide bundle 31 may be mixed with a plurality of carbon fibers 40a in a random manner. For example, the light guide fiber 31a and the carbon fiber 40a are sequentially stacked from the center of the light guide bundle 31 in the circumferential direction. Thereby, the distribution of the illumination light by the light guide fiber 31a is optimized, and the efficiency of heat transfer by the carbon fiber 40a is improved.

  By mixing a plurality of carbon fibers 40a in the light guide bundle 31 in this way, for example, the heat generated at the place where several light guide fibers 31a are broken is dispersed back and forth by the carbon fibers 40a, and the local High temperature can be prevented and the thermal effect on other built-in objects can be reduced.

(Fifth embodiment)
Next, an endoscope apparatus 1 according to a fifth embodiment will be described below based on FIG.
FIG. 13 is a cross-sectional view illustrating the configuration of the distal end portion of the insertion portion and the bending portion according to the fifth embodiment of the present invention. In the following description, the same components as those in the first embodiment are denoted by the same reference numerals for the sake of convenience of description, and detailed descriptions and operational effects of those components are omitted. The configuration of the present embodiment may be implemented in combination with the configurations of the first to fourth embodiments.

  As shown in FIG. 13, the channel tube 27 of the present embodiment is provided with a heat absorption coil 27a spirally wound around the outer periphery. The heat absorption coil 27a is formed of, for example, a metal coil such as copper, aluminum, or iron, or a pitch-based carbon coil.

  The heat absorption coil 27a is connected to the other end of the guide member 61 to which the side of the imaging unit 30 and one end are connected. The guide member 61 is also made of, for example, a metal such as copper, aluminum, iron, or pitch-based carbon. Further, the imaging unit 30 is connected to an outer peripheral part of the channel tube 27 through an adhesive 62 made of pitch-based carbon, for example. The adhesive 62 is in contact with a heat absorption coil 27 a provided on the outer periphery of the channel tube 27.

  With such a configuration, the drive heat of the imaging unit 30 is transferred to the heat absorption coil 27 a of the channel tube 27 via the adhesive 62. Since the heat transferred to the heat absorption coil 27a is transferred to the rear side of the insertion portion 2 by the heat absorption coil 27a, it is possible to prevent the tip portion 6 from being heated too high.

  Although not shown in the drawing, the resin guide 29 of the light guide bundle 31 and the outer peripheral part of the channel tube 27 are connected via the adhesive 62 and transmitted by the light guide bundle 31 with the same configuration as described above. By transferring the irradiation light heat generated by the illumination light to the heat absorption coil 27a and moving the heat to the rear side of the insertion portion 2, it is possible to further prevent the tip portion 6 from becoming hot.

  Further, the heat absorption coil 27 a may be provided on the cable 34 extending from the imaging unit 30 and the resin sheath 29 covering the light guide bundle 31.

(Sixth embodiment)
Next, an endoscope apparatus 1 according to a sixth embodiment will be described below based on FIG.
FIG. 14 is a cross-sectional view showing the configuration of the imaging unit according to the sixth embodiment of the present invention. In the following description, the same components as those in the first embodiment are denoted by the same reference numerals for the sake of convenience of description, and detailed descriptions and operational effects of those components are omitted. The configuration of the present embodiment may be implemented in combination with the configurations of the first to fifth embodiments.

  As shown in FIG. 14, the imaging unit 30 includes an imaging element holding frame 55 fitted on the base end side of the lens holding frame 24 that holds the objective lens 21 and the objective optical system 25, and the imaging element holding frame 55. A plurality of mounting components 59 such as an electronic component mounted on the substrate 58, a substrate 58 electrically connected to the solid-state imaging device 57, and a solid-state imaging device 57 adhered to the held cover lens 56. The adhesive 60 is fixedly formed so as to cover the base of the image sensor holding frame 55 to the periphery of the solid-state image sensor 57, the substrate 58, the plurality of mounting components 59 and the tip of the cable 34.

  The adhesive 60 is formed with a plurality of heat-dissipating parts 60a, which are heat-dissipating holes in which the solid-state imaging device 57 and a part of the surface of a plurality of mounting parts are exposed to form an opening that communicates with the outside during fixing molding. Has been. In order to maintain the airtightness of the substrate 58, the adhesive 60 is an electric circuit provided on the substrate 58, which is an electrical connection portion between the entire substrate 58, the solid-state imaging device 57, and the plurality of mounting components 59. The connection land or the like is hermetically sealed so as not to be exposed to the outside.

  By setting it as such a structure, the imaging unit 30 is the heat_generation | fever structure, The heat | fever of the solid-state image sensor 57 and the some mounting components 59 is dissipated outside from the exhaust heat part 60a. Thereby, it becomes difficult for heat to be trapped in the imaging unit 30, and the temperature rise of the imaging unit 30 can be reduced.

  In order to easily form the heat exhausting portion 60a of the adhesive 60, the solid-state imaging device 57 and the guide member of the insulating tubular member formed with a passage through which air passes so as to expose the partial surfaces of the plurality of mounting components. May be embedded.

(Seventh embodiment)
Next, an endoscope apparatus 1 according to a seventh embodiment will be described below based on FIG.
FIG. 15 is a cross-sectional view showing the configuration of the tip portion according to the seventh embodiment of the present invention. In the following description, the same components as those in the first embodiment are denoted by the same reference numerals for the sake of convenience of description, and detailed descriptions and operational effects of those components are omitted. The configuration of the present embodiment may be implemented in combination with the configurations of the first to sixth embodiments.

  As shown in FIG. 15, the distal end portion 6 of the endoscope apparatus 1 according to the present embodiment is formed of a transparent resin member having a light transmission property, in which the distal end hard portion 70 has a concave lens function also serving as an illumination lens. A mirror film 71 such as metal coating by vapor deposition is formed on the back surface (base end surface) of the distal end hard portion 70, the rear side peripheral surface, and the hole surface through which the imaging unit 30, the light guide bundle 31 and the like are inserted and fitted. It is filmed. The mirror film 71 may be a metallic frame having a mirror-treated surface on the side in contact with the hard tip portion 70.

  With such a configuration, the illumination light transmitted by the light guide bundle 31 is reflected by the mirror film 71 and is reflected as reflected light (L2) on the front side because the light reflected in the tip hard portion 70 is reflected. The light quantity loss of the illumination lights L1 and L2 irradiated to the outside is reduced. In FIG. 15, the illumination lights L1 and L2 irradiated to the outside are illustrated without considering the difference in the refractive index of light between the distal end hard portion 70 and air.

  Furthermore, with the configuration described above, the illumination light transmitted from the light guide bundle 31 reflects the light reflected inside the tip hard portion 70 to the outside substantially, and therefore the tip hard portion due to absorption of the reflected light. The temperature rise of 70 can also be reduced.

  The invention described above is not limited to the above-described embodiments, and various modifications can be made without departing from the scope of the invention at the stage of implementation. Further, each embodiment includes various stages of the invention, and various inventions can be extracted by appropriately combining a plurality of disclosed constituent elements.

  For example, even if some constituent requirements are deleted from all the constituent requirements shown in each embodiment, this constituent requirement can be obtained when the described effect can be obtained for the problem to be solved by the invention. A configuration in which is deleted can be extracted as an invention.

DESCRIPTION OF SYMBOLS 1 ... Endoscope apparatus 2 ... Insertion part 3 ... Operation part 4 ... Universal cord 5 ... Light source connector 5a ... Light source connector 5b ... Electric connector 6 ... Tip part 7 ... Curved part 8 ... Flexible tube part 10 ... Operation part 11 ... Folding prevention part 12 ... gripping part 13 ... treatment instrument insertion part 13a ... treatment instrument insertion port 14 ... main operation part 15 ... bending lever 16 ... switch 17 ... suction valve 20 ... distal end hard part 20a ... hard tube 21 ... objective lens 22 ... Illumination lens 23 ... treatment device channel 24 ... lens holding frame 25 ... objective optical system 26 ... tube connecting tube 27 ... channel tube 28 ... metal holding tube 29 ... resin sheath 30 ... imaging unit 31 ... light guide bundle 34 ... cable 35 ... curved Piece 36 ... pivot member 37 ... outer skin 38 ... bobbin adhering portion 40 ... carbon fiber bundle unit 40a ... carbon fibers 42, 43, 44 ... hole 45 ... bending piece

Claims (9)

In the endoscope apparatus in which the imaging means and the illumination means are built in the distal end portion of the insertion portion,
An endoscope apparatus, wherein carbon fibers are disposed in a space between built-in objects in the distal end portion, and the carbon fibers are extended to the rear side of the insertion portion.   The endoscope apparatus according to claim 1, wherein the carbon fiber is a carbon fiber bundle obtained by bundling a plurality of carbon fibers.   2. The endoscope apparatus according to claim 1, wherein the carbon fiber is formed in a braided tube-like carbon fiber network, and the imaging unit and the illumination unit are covered with the carbon fiber network. .   The inner side according to claim 1, wherein the carbon fiber is formed in a braided tube-like carbon fiber network, and the carbon fiber network is laminated so as to overlap the inner surface of the outer surface of the insertion portion. Endoscopic device. A plurality of the carbon fiber bundles;
The endoscope apparatus according to claim 2, wherein the distal ends of the carbon fiber bundles are respectively connected to a distal end hard portion of the distal end portion to which the imaging unit and the illumination unit are fitted and fixed. The illumination means has a light guide bundle in which a plurality of single-core fibers are bundled,
The endoscope apparatus according to claim 1, wherein a plurality of the carbon fibers are inserted and arranged so as to be mixed in the light guide bundle.   The endoscope apparatus according to claim 6, wherein the single-core fiber and the carbon fiber are laminated in order from a center of the light guide bundle in a circumferential direction.   The endoscope apparatus according to any one of claims 1 to 7, wherein the carbon fibers are pitch-based carbon fibers. The insertion portion has a bending portion,
The endoscope apparatus according to any one of claims 1 to 8, wherein the carbon fiber extends at least into the curved portion.

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