JP2017136298A - Endoscope - Google Patents

Abstract

An endoscope capable of reducing the time and labor required for cleaning and disinfecting a treatment tool stand is provided. According to the present invention, a rotating shaft 52 and a rotating shaft 58 of a stand 50 are magnetically connected in a non-contact manner by a magnetic gear device 70 via a partition wall 46. Accordingly, the rotational force transmitted from the power source to the rotating shaft 58 is transmitted to the rotating shaft 52 without providing a through hole through which the rotating shaft is disposed, and the stand 50 is rotated around the rotating shaft 52. The posture can be changed between the standing position and the lying position. [Selection] Figure 5

Description

  The present invention relates to an endoscope, and more particularly, to an endoscope provided with a treatment instrument stand that changes a direction in which a treatment instrument is led out at a distal end portion of an insertion portion.

  In an endoscope, various treatment instruments are introduced from a treatment instrument introduction port provided in a hand operation section (hereinafter referred to as “operation section”), and the treatment instrument is opened at the distal end of the insertion section. Derived from the device outlet to the outside and used for treatment. For example, a duodenoscope uses a treatment tool such as a guide wire or a contrast tube, and an ultrasonic endoscope uses a treatment tool such as a puncture needle. A treatment tool is used. Such a treatment tool needs to change the derivation direction at the distal end portion in order to treat a desired position in the subject. For this reason, a treatment instrument stand (hereinafter referred to as “stand stand”) is provided at the distal end, and the endoscope has a treatment instrument that changes the posture of the stand between the standing position and the lying position. A standing mechanism is provided.

  As a treatment instrument standing mechanism, a wire pulling type mechanism in which a tip of a pulling wire is directly attached to a stand is known (see Patent Document 1). In this mechanism, the base end of the pulling wire is connected to an operating lever provided in the operating unit, and the pulling wire is pushed and pulled by the operating lever to rotate the stand up around the rotation axis. The posture is changed between.

  In addition, as another treatment instrument raising mechanism, a treatment instrument standing space (corresponding to a second accommodation chamber) in which a stand is accommodated and a lever accommodation space (in the first accommodation chamber) in which a lever is accommodated at the distal end portion of the insertion portion. A lever-type mechanism is known (refer to Patent Document 2). This mechanism connects the lever and the stand with a rotation shaft, attaches an operation wire to the lever, and pushes and pulls the operation wire with the operation lever provided in the operation unit to rotate the stand up around the rotation axis The posture is changed between the standing position and the lying position.

  In the treatment instrument erecting mechanism of Patent Document 2, a seal member is disposed between the outer peripheral surface of the rotating shaft that rotates the stand and the inner wall surface of the through hole of the partition wall that rotatably supports the rotating shaft. By forming an airtight surface with the member, blood, water, and the like are prevented from entering through the through hole from the treatment instrument standing space side to the lever housing space side. The treatment instrument standing space is a space for leading out the treatment instrument and communicates with the outside air. However, the lever housing space is sealed from the outside air by the above-described sealing structure including the partition wall and the seal member. .

JP2015-104424A JP 2010-201020 A

  By the way, the endoscope is cleaned and disinfected using a cleaning liquid and a disinfecting liquid every time it is used for various examinations and treatments. At this time, the distal end of the insertion portion provided with the stand is miniaturized and the shape thereof is complicated, so that the cleaning property and the disinfecting solution circulate, the insertion property of the cleaning brush, and the water draining property are improved and the cleaning operation is easy. Is required. In particular, since the gap between the outer peripheral surface of the rotating shaft that rotates the stand and the inner wall surface of the through hole of the partition wall is small, there is a problem that it takes time and labor to clean and disinfect the gap.

  The present invention has been made in view of such circumstances, and an object thereof is to provide an endoscope that can reduce the time and labor required for cleaning and disinfecting a treatment instrument stand.

  In order to achieve the object of the present invention, an endoscope according to the present invention is provided with an insertion portion having a distal end and a proximal end, a distal end main body provided on the distal end side of the insertion portion, and a distal end main body. The first storage chamber sealed from the outside air, the second storage chamber provided in the tip body, and communicated with the outside air, provided in the tip body, and between the first storage chamber and the second storage chamber A partition provided, a first rotating shaft housed in a first housing chamber and connected to a drive source, a treatment instrument stand having a second rotating shaft housed in a second housing chamber, and a first rotating shaft; And a second rotating shaft are connected magnetically in a non-contact manner via a partition wall, and a magnetic gear device that transmits the rotational force transmitted from the drive source to the first rotating shaft to the second rotating shaft is provided.

  According to the present invention, since the first rotating shaft and the second rotating shaft are magnetically contactlessly connected via the partition wall by the magnetic gear device, the through hole through which the rotating shaft is disposed is not provided in the partition wall. The rotational force transmitted from the drive source to the first rotating shaft is transmitted to the second rotating shaft, the treatment instrument stand is rotated around the second rotating shaft, and the posture is changed between the standing position and the lying position. Can be made. Therefore, according to the endoscope of the present invention, since the through hole of the partition wall can be eliminated, it is possible to reduce the time and labor required for cleaning and disinfecting the treatment instrument stand. In addition, since the magnetic gear device rotates the treatment instrument stand by torque transmission, compared with a treatment instrument stand mechanism that changes the posture of the treatment instrument stand using repulsion or adsorption of magnetic force, Power can be reliably transmitted to the treatment instrument stand.

  According to one aspect of the present invention, a magnetic gear device is provided on a first rotating shaft and has a first magnetic force generation surface, and is provided on a second rotating shaft and generates a first magnetic force of the first magnetic gear. And a second magnetic gear having a second magnetic force generation surface opposed to the surface.

  According to one aspect of the present invention, torque transmitted from the drive source to the first rotating shaft can be transmitted to the second rotating shaft.

  In one aspect of the present invention, the first rotating shaft and the second rotating shaft are coaxially arranged, and the first magnetic force generation surface of the first magnetic gear is provided in a direction orthogonal to the axial direction of the first rotating shaft. The second magnetic force generation surface of the second magnetic gear is provided in a direction orthogonal to the axial direction of the second rotation shaft, and the first magnetic force generation surface and the second magnetic force generation surface are arranged to face each other via a partition wall. Is preferred.

  According to one aspect of the present invention, a first magnetic force generation surface provided in a direction orthogonal to the axial direction of the first rotation shaft, and a second magnetic force generation provided in a direction orthogonal to the axial direction of the second rotation shaft. Since the surfaces can be arranged to face each other in parallel via the partition wall, the torque transmitted from the drive source to the first rotating shaft can be efficiently transmitted to the second rotating shaft.

  In one embodiment of the present invention, the first surface of the partition facing the first magnetic force generation surface is provided in parallel with the first magnetic force generation surface, and the second surface of the partition facing the second magnetic force generation surface is the second It is preferable to be provided in parallel with the magnetic force generation surface.

  According to one aspect of the present invention, since the first surface of the partition wall is parallel to the first magnetic force generation surface and the second surface of the partition wall is parallel to the second magnetic force generation surface, it is not necessary to process the partition wall.

  In one aspect of the present invention, the first magnetic force generation surface of the first magnetic gear is provided on the outer peripheral surface of the convex portion provided coaxially with the first rotation shaft, and the second magnetic force generation surface of the second magnetic gear is The first magnetic gear side convex portion is provided on the inner peripheral surface of the concave portion provided coaxially with the second rotating shaft, and the first magnetic gear side convex portion is inserted and disposed in the concave portion on the second magnetic gear side. It is preferable that the surface and the second magnetic force generation surface are disposed to face each other via a partition wall.

  According to one aspect of the present invention, the first magnetic force generating surface provided on the outer peripheral surface of the convex portion coaxial with the first rotating shaft and the inner peripheral surface of the concave portion coaxial with the second rotating shaft are provided. By arranging the second magnetic force generation surface to face each other via the partition wall, the torque transmitted from the drive source to the first rotation shaft can be efficiently transmitted to the second rotation shaft.

  In one aspect of the present invention, the convex portion on the first magnetic gear side is inserted into the inner peripheral space of the protruding portion of the partition wall protruding to the second storage chamber side, and the second magnetic field is formed on the outer peripheral portion of the protruding portion of the partition wall. It is preferable that the recess of the gear is inserted.

  According to the aspect of the present invention, it is necessary to process the protruding portion in the partition wall, but the first rotating shaft and the second rotating shaft are caused by the magnetic force depending on the arrangement form of the first magnetic force generating surface and the second magnetic force generating surface. Since there is no force attracting in the axial direction, it is possible to reduce the burden on the bearing that supports the first rotating shaft and the bearing that supports the second rotating shaft.

  In one aspect of the present invention, it is preferable that the treatment instrument stand is rotatably supported by the distal end portion main body via a shaft disposed coaxially with the second rotation shaft.

  According to one aspect of the present invention, the treatment instrument stand is smoothly rotated around the second rotation axis by the torque transmitted from the first rotation axis to the second rotation axis.

  In one embodiment of the present invention, a distal end body is provided with a cap detachably attached to the distal end body, the cap is provided with a second storage chamber, and the second storage chamber has a second rotating shaft. And a second magnetic gear is preferably provided.

  According to the aspect of the present invention, the cap can be removed from the distal end main body, and the treatment instrument stand and the second magnetic gear can be cleaned together with the cap, so that the cleanability and disinfection are further improved.

  In order to achieve the object of the present invention, the present invention provides an insertion portion having a distal end and a proximal end, a distal end main body provided on the distal end side of the insertion portion, a distal end main body, and sealed from outside air. A first storage chamber, a second storage chamber provided in the tip body and communicated with the outside air, a partition wall provided between the first storage chamber and the second storage chamber provided in the tip body. The rotating shaft housed in the first housing chamber and connected to the drive source, the treatment instrument stand that is housed in the second housing chamber, and the rotation shaft and the treatment instrument stand are magnetically coupled to each other through the partition wall. And a magnetic gear device that is connected by contact and that transmits the rotational force transmitted from the drive source to the rotation shaft to the treatment instrument stand.

  According to the present invention, the magnetic gear device connects the rotating shaft and the treatment instrument stand in a magnetically non-contact manner via the partition wall, so that without providing a through hole in which the rotating shaft passes through the partition wall, The rotational force transmitted from the drive source to the rotation shaft can be transmitted to the treatment instrument stand, and the treatment tool stand can be rotated about the rotation axis to change its posture between the standing position and the lying position. Therefore, according to the endoscope of the present invention, since the through hole of the partition wall can be eliminated, it is possible to reduce the time and labor required for cleaning and disinfecting the treatment instrument stand.

  According to one aspect of the present invention, a magnetic gear device is provided on a rotating shaft and provided with a first magnetic gear having a first magnetic force generation surface, a treatment instrument stand, and a first magnetic gear surface of the first magnetic gear. A second magnetic gear having a second magnetic force generation surface opposed to the first magnetic gear, and the first magnetic force generation surface of the first magnetic gear is provided on an outer peripheral surface of a convex portion provided coaxially with the rotation shaft, The second magnetic force generating surface of the second magnetic gear is provided on the inner peripheral surface of the concave portion provided on the treatment instrument stand, and the convex portion on the first magnetic gear side is inserted into the concave portion on the treatment instrument stand base. By doing so, the first magnetic force generating surface and the second magnetic force generating surface are arranged to face each other, and the convex portion on the first magnetic gear side is the inner peripheral space portion of the protruding portion of the partition wall protruding to the second accommodating chamber side. It is preferable that the recess on the treatment instrument stand base side is inserted into the outer peripheral portion of the protruding portion of the partition wall.

  According to one aspect of the present invention, the torque transmitted from the drive source to the rotating shaft can be efficiently transmitted to the treatment instrument stand. In addition, the first magnetic force generation surface provided on the outer peripheral surface of the convex portion coaxial with the rotation axis and the second magnetic force generation surface provided on the inner peripheral surface of the concave portion on the treatment instrument stand base side are interposed via a partition wall. Thus, the torque transmitted from the drive source to the rotating shaft can be efficiently transmitted to the treatment instrument stand. Furthermore, although it is necessary to process the protruding portion in the partition wall, the arrangement form of the first magnetic force generation surface and the second magnetic force generation surface eliminates the force that the rotating shaft and the treatment instrument stand are attracted in the axial direction by the magnetic force. The burden on the bearing that supports the rotating shaft can be reduced, and the protrusion can be used as a bearing that supports the treatment instrument stand. Therefore, a dedicated bearing for supporting the treatment instrument stand can be eliminated.

  The endoscope of the present invention can reduce the time and labor required for cleaning and disinfecting the treatment tool stand.

Side view showing the overall configuration of the endoscope according to the first embodiment. External perspective view showing the configuration of the distal end portion of the insertion portion Assembly perspective view of the tip body Front view of the tip body Schematic block diagram of the treatment instrument standing mechanism according to the first embodiment Explanatory drawing showing the positional relationship between the stand and the stand stand lever Explanatory drawing which showed the posture of the stand stand lever when the stand posture was changed to the lying position Explanatory drawing which showed the posture of the stand stand lever when the stand posture was changed to the stand position Schematic block diagram of the treatment instrument standing mechanism according to the second embodiment Schematic block diagram of the treatment instrument standing mechanism according to the third embodiment Schematic block diagram of the treatment instrument standing mechanism according to the fourth embodiment Schematic block diagram of the treatment instrument standing mechanism according to the fifth embodiment

  Hereinafter, preferred embodiments of an endoscope according to the present invention will be described in detail with reference to the accompanying drawings.

  FIG. 1 is a side view showing an overall configuration of an endoscope 10 according to an embodiment of the present invention.

[Overall configuration of endoscope 10]
The endoscope 10 is an endoscope for side view, and includes an insertion portion 12 that is inserted into the body of a subject, and an operation portion 14 is connected to the proximal end side of the insertion portion 12. A universal cord 16 is connected to the operation unit 14, and the endoscope 10 is connected to a light source device, an image processing device, and an air / water supply device (not shown) via the universal cord 16.

<Whole structure of the insertion part 12>
The insertion portion 12 has a distal end and a proximal end, and is configured by connecting the distal end portion 18, the bending portion 20, and the flexible portion 22 from the distal end side toward the proximal end side. Inside the insertion portion 12, a treatment instrument insertion channel 24 (see FIG. 2) for guiding the treatment instrument to the distal end portion 18, and an operation wire 26 (see FIG. 2) for changing the direction in which the treatment instrument is derived from the distal end portion 18. ), A light guide (not shown) that guides the illumination light supplied from the light source device to the tip 18, and an air / water supply tube (not shown) that guides the air and water supplied from the air / water supply device to the tip 18. And are inserted.

<Configuration of operation unit 14>
The operation portion 14 is operated to change the derivation direction of the treatment instrument derived from the distal end portion 18 by pushing and pulling the angle knobs 28 and 28 and the operation wire 26 (see FIG. 2) for bending the bending portion 20. Blood is supplied from the operation lever 30, the air / water supply button 32 for ejecting air and water from the air / water supply nozzle 69 (see FIG. 2) provided at the tip 18 and the suction port (not shown) provided at the tip 18. A suction button 34 for sucking body fluid such as is provided at a predetermined position. The operation lever 30 described above corresponds to a drive source of the present invention for rotating a treatment instrument stand that will be described later.

  The operation unit 14 is provided with a treatment instrument introduction port 36 for introducing various treatment instruments. The treatment instrument introduced from the treatment instrument introduction port 36 is disposed on the distal end portion 18 (see FIG. 2) via the treatment instrument insertion channel 24 (see FIG. 2) inserted into the insertion section 12. ) To the outside.

<Configuration of the bending portion 20>
The bending portion 20 has a structure in which a plurality of angle rings (not shown) are connected to each other so as to be rotatable. The bending portion 20 is configured by covering the outer periphery of the structure with a cylindrical net knitted with a metal wire, and covering the outer peripheral surface of the net with a rubber outer skin. In addition, a plurality of wires (not shown) are disposed from the angle knobs 28 and 28 of the operation unit 14 to the bending portion 20, and the tips of these wires are fixed to the tip portions of the angle rings constituting the bending portion 20. Has been. Accordingly, the bending portion 20 is bent vertically and horizontally by pushing and pulling these wires by the turning operation of the angle knobs 28 and 28.

<Configuration of the soft part 22>
The flexible part 22 has a spiral tube formed by spirally winding a thin metal strip having elasticity. The flexible portion 22 is configured by covering the outer surface of the spiral tube with a cylindrical net knitted with a metal wire, and covering the outer peripheral surface of the net with a resin outer skin.

<Configuration of the tip 18>
FIG. 2 is an external perspective view showing the configuration of the tip 18. The distal end portion 18 includes a distal end portion main body 40 having a treatment instrument outlet 38 and a cap 42 that is attached to the distal end portion main body 40 and covers the distal end portion main body 40. The distal end body 40 is provided on the distal end side of the insertion portion 12. Further, the distal end main body 40 is provided with an upright stand accommodating chamber 44 which is a second accommodating chamber in which the treatment instrument outlet 38 is formed.

  The cap 42 is formed in a substantially cylindrical shape whose tip side is sealed, and a substantially rectangular opening window 42A is formed on a part of the outer peripheral surface thereof. When the cap 42 is attached to the distal end portion main body 40, the treatment instrument outlet 38 is communicated with the outside air through the opening window 42A. Thereby, the upright stand accommodating chamber 44 is communicated with the outside air through the treatment instrument outlet 38 and the opening window 42A. The cap 42 is made of an elastic material such as fluorine rubber or silicon rubber. The cap 42 has an engagement portion (not shown) that engages with a groove (not shown) formed in the distal end portion main body 40 on the proximal end side, and the distal end portion by engaging the engagement portion with the groove. The main body 40 is detachably mounted.

<Main configuration of tip body 40>
FIG. 3 is an assembled perspective view of the tip end body 40. FIG. 4 is a front view of the tip body 40. The tip main body 40 is made of a metal material such as stainless steel, which is a non-magnetic material and has corrosion resistance. Further, the tip body 40 is integrally provided with a partition wall 46 projecting from the tip side and a partition wall 48 facing the partition wall 46. Between the partition wall 46 and the partition wall 48, an upright stand accommodation chamber 44 for accommodating the upright stand 50 is formed. A treatment instrument outlet 38 for leading the treatment instrument to the outside is formed on the upper surface side in the drawing of the upright storage chamber 44.

  The stand of the treatment instrument insertion channel 24 communicates with the upright storage chamber 44. The proximal end of the treatment instrument insertion channel 24 is inserted into the insertion section 12 and connected to the treatment instrument introduction port 36 of the operation section 14. As a result, the treatment instrument introduced from the treatment instrument introduction port 36 to the proximal end of the treatment instrument insertion channel 24 is guided from the distal end of the treatment instrument insertion channel 24 to the stand support chamber 44 via the treatment instrument insertion channel 24. The

  The stand 50 accommodated in the stand support chamber 44 is a treatment instrument stand for changing the direction of the treatment instrument led out from the treatment instrument outlet 38.

  Here, FIG. 5 is a schematic configuration diagram of the treatment instrument stand-up mechanism 120 according to the first embodiment for changing the posture of the stand 50 between the stand-up position and the lying down position.

  As shown in FIGS. 3 and 5, the stand 50 has a rotary shaft 52 that is a second rotary shaft on the base end side, and the rotary shaft 52 is supported by a bearing 45 provided in the stand support chamber 44. . The stand 50 is rotated about the axis of the rotary shaft 52 together with the rotary shaft 52, whereby the posture of the stand 50 is changed between the standing position and the lying position.

  The partition wall 46 corresponds to the partition wall of the present invention. As shown in FIG. 3, an upright lever storage chamber 56, which is a first storage chamber for storing the upright stand raising lever 54, is provided on the opposite side of the upright stand storage chamber 44 with the partition wall 46 interposed therebetween. The upright lever storage chamber 56 is covered with a protective plate, so that the airtightness of the upright lever storage chamber 56 is maintained and sealed from the outside air.

  As described above, the end portion main body 40 includes the upright lever storage chamber 56 sealed from the outside air, the upright stand storage chamber 44 communicated with the outside air, and the upright lever storage chamber 56 and the upright stand storage chamber 44. And a partition wall 46 provided. In addition, a rotation shaft 58 that is a first rotation shaft is provided on the proximal end side of the upright stand raising lever 54. A bearing 47 that supports the rotating shaft 58 is provided in the standing lever accommodating chamber 56 as shown in FIG. Further, as shown in FIG. 5, the rotating shaft 58 and the rotating shaft 52 are arranged coaxially with the partition wall 46 interposed therebetween.

  Here, FIG. 6 is an explanatory view showing the positional relationship between the stand 50 and the stand stand lever 54 excluding the partition wall 46.

  The rotating shaft 58 of the upright stand raising lever 54 is magnetically contactlessly connected to the rotating shaft 52 of the upright table 50 via the partition wall 46 via a magnetic gear device described later. This magnetic gear device is a device that transmits the rotational force transmitted from the operation lever 30 as a drive source to the operation wire 26, the upright stand upright lever 54, and the rotary shaft 58 to the rotary shaft 52 of the upright stand 50 as a rotary force. is there.

  As shown in FIG. 2, the distal end of the operation wire 26 is coupled to the coupling portion 66 provided on the distal end side of the upright stand raising lever 54. Therefore, when the operation wire 26 is pushed and pulled by the operation lever 30 (see FIG. 1), the upright stand raising lever 54 is rotated around the axis of the rotation shaft 58 together with the rotation shaft 58 (see FIG. 5). The operation wire 26 is inserted into the insertion portion 12 through a wire insertion hole 68 (see FIG. 3) whose proximal end is opened in the wall surface of the upright lever housing chamber 56, and is connected to the operation lever 30 of the operation portion 14. That is, the rotating shaft 58 is connected to the operation lever 30 that is a drive source via the upright stand elevating lever 54 and the operation wire 26.

<Other configuration of the tip body 40>
As shown in FIGS. 2 and 3, an optical system accommodation chamber 60 is provided on the opposite side of the upright stand accommodation chamber 44 across the partition wall 48. The optical system housing chamber 60 is kept airtight by covering the tip body 40 with a protective plate (not shown).

  An illumination window 62 and an observation window 64 are disposed adjacent to each other at the upper part of the optical system accommodation chamber 60, and an air / water supply nozzle 69 directed to the observation window 64 is provided on the distal end body 40. . The air / water supply nozzle 69 is connected to the above-described air / water supply device via an air / water supply tube (not shown) inserted through the insertion portion 12. By operating the air / water supply button 32 of the operation unit 14 shown in FIG. 1, compressed air or water is jetted from the air / water supply nozzle 69 toward the observation window 64, and the observation window 64 is washed.

  An illumination unit and a photographing unit (not shown) are accommodated inside the optical system accommodation chamber 60. The illumination unit includes an illumination lens installed inside the illumination window 62 and a light guide disposed so that the tip of the illumination lens faces the illumination lens. The light guide is inserted through the insertion portion 12 of the endoscope 10, and the base end thereof is connected to the light source device described above. Thereby, the irradiation light from the light source device is transmitted through the light guide and is irradiated to the outside from the illumination window 62.

  The imaging unit includes an imaging optical system disposed inside the observation window 64 and a complementary metal oxide semiconductor (CMOS) type or charge coupled device (CCD) type imaging device. The imaging element is connected to the above-described image processing apparatus via a signal cable inserted through the insertion unit 12 and the universal cord 16. An imaging signal of the subject image obtained by the photographing unit is output to the image processing apparatus via the signal cable and subjected to image processing, and then displayed as a subject image on a monitor connected to the image processing apparatus.

<Configuration of Magnetic Gear Device 70 According to First Embodiment>
As shown in FIGS. 5 and 6, the treatment instrument erecting mechanism 120 according to the first embodiment includes the magnetic gear device 70 according to the first embodiment.

  The magnetic gear device 70 connects a rotary shaft 58 that is a first rotary shaft and a rotary shaft 52 that is a second rotary shaft in a magnetic non-contact manner via a partition wall 46 made of stainless steel, for example. This is a device for transmitting the rotational force transmitted from a certain operating lever 30 to the rotary shaft 58 to the rotary shaft 52. Specifically, it has the following configuration.

  The magnetic gear device 70 is provided on the rotating shaft 58 and has a disk-shaped first magnetic gear 74 having a first magnetic force generating surface 72, and the first magnetic force generating surface 72 of the first magnetic gear 74 provided on the rotating shaft 52. And a disk-shaped second magnetic gear 78 having a second magnetic force generation surface 76 opposed to the first magnetic force generation surface 76. The first magnetic force generation surface 72 and the second magnetic force generation surface 76 are arranged to face each other in parallel via the partition wall 46.

  In the embodiment, the first magnetic force generation surface 72 and the second magnetic force generation surface 76 are arranged in parallel so that the first magnetic force generation surface 72 and the second magnetic force generation surface 76 are opposed to each other. In the device 70, the torque of the first magnetic gear 74 can be transmitted to the second magnetic gear 78 without necessarily arranging the first magnetic force generating surface 72 and the second magnetic force generating surface 76 to face each other in parallel. That is, if the torque of the first magnetic gear 74 can be transmitted to the second magnetic gear 78, the first magnetic force generation surface 72 and the second magnetic force generation surface 76 are relatively set to a predetermined angle (for example, 1 to 10). °) It may be tilted and placed opposite. However, the magnetic gear device 70 has a function of increasing the torque transmission efficiency as the relative inclination angle between the first magnetic force generation surface 72 and the second magnetic force generation surface 76 becomes smaller. As described above, it is preferable that the first magnetic force generation surface 72 and the second magnetic force generation surface 76 are arranged to face each other in parallel. As a result, the torque transmitted from the drive source to the rotating shaft 58 can be efficiently and maximally transmitted to the rotating shaft 52 as will be described later.

  The above-described configuration will be described using another expression. The rotating shaft 58 and the rotating shaft 52 are coaxially arranged, and the first magnetic gear 74 is provided in a direction orthogonal to the axial direction of the rotating shaft 58. The second magnetic force generation surface 76 of the second magnetic gear 78 is provided in a direction orthogonal to the axial direction of the second magnetic gear 78. As a result, the first magnetic force generation surface 72 and the second magnetic force generation surface 76 are arranged to face each other in parallel, and the above-described effects can be obtained.

  The first magnetic force generating surface 72 and the second magnetic force generating surface 76 are circular with the centers of the first magnetic gear 74 and the second magnetic gear 78 (which are also the axes of the rotating shafts 52 and 58) formed in a disk shape as the center. A plurality of permanent magnets having different polarities in the circumferential direction are alternately arranged.

  Further, the first surface 46A of the partition wall 46 facing the first magnetic force generation surface 72 is provided in parallel with the first magnetic force generation surface 72, and the second surface 46B of the partition wall 46 facing the second magnetic force generation surface 76 is the same. The second magnetic force generation surface 76 is provided in parallel. In the magnetic gear device 70, even if the first surface 46A of the partition wall 46 is not provided in parallel with the first magnetic force generation surface 72, the second surface 46B of the partition wall 46 is not provided in parallel with the second magnetic force generation surface 76. However, the torque of the first magnetic gear 74 can be transmitted to the second magnetic gear 78. That is, the first surface 46A and the second surface 46B of the partition wall 46 are inclined with respect to the first magnetic force generation surface 72 and the second magnetic force generation surface 76, or irregularities occur on the first surface 46A and the second surface 46B. Even if it does, it does not affect the torque transmission by magnetic force. However, by providing the first surface 46A of the partition wall 46 in parallel with the first magnetic force generation surface 72 and the second surface 46B of the partition wall 46 in parallel with the second magnetic force generation surface 76, the processing of the partition wall 46 as will be described later. Therefore, the magnetic gear device 70 can be easily attached to the tip portion main body 40.

[Operation of the treatment instrument stand-up mechanism 120 according to the first embodiment]
Next, the operation of the treatment instrument erecting mechanism 120 according to the first embodiment having the magnetic gear device 70 according to the first embodiment will be described.

  FIG. 7 is an explanatory view showing the posture of the stand-up stand raising lever 54 when the posture of the stand 50 is changed to the lying position, and FIG. 8 is a stand-up when the posture of the stand 50 is changed to the stand-up position. It is explanatory drawing which showed the attitude | position of the stand raising lever.

  As shown in FIG. 7, when the operation wire 30 is pushed by operating the operation lever 30 (see FIG. 1), the upright stand raising lever 54 rotates in the A direction around the axis of the rotation shaft 58 together with the rotation shaft 58. That is, when the rotating shaft 58 rotates in the A direction via the upright stand raising lever 54, the rotating shaft 52 rotates in the A direction together with the rotating shaft 58 by the magnetic force of the magnetic gear device 70, and the upright table 50 moves to the lying position. .

  On the other hand, when the operation lever 30 (see FIG. 1) is operated in the reverse direction and the operation wire 26 is pulled as shown in FIG. Rotate to. That is, when the rotating shaft 58 rotates in the B direction via the upright stand raising lever 54, the rotating shaft 52 rotates in the B direction together with the rotating shaft 58 by the magnetic force of the magnetic gear device 70, and the upright 50 moves to the standing position. . As described above, by operating the operation lever 30, the rotating shaft 58 is rotated in the A and B directions via the upright stand rising lever 54, whereby the upright base 50 is moved to the upright position and the lying down position by the magnetic force of the magnetic gear device 70. To do.

<Effect>
According to the treatment instrument erecting mechanism 120 according to the first embodiment, since the rotary shaft 52 and the rotary shaft 58 are magnetically connected to each other via the partition wall 46 by the magnetic gear device 70, the rotary shaft is disposed in a penetrating manner. Without providing the through-hole formed in the partition wall 46, the rotational force transmitted from the drive source to the rotary shaft 58 is transmitted to the rotary shaft 52, and the stand 50 is rotated around the rotary shaft 52, and the standing position and the lying position are determined. The posture can be changed between.

  Therefore, according to the endoscope 10 having the treatment instrument erecting mechanism 120 according to the first embodiment, since the through hole of the partition wall 46 can be eliminated, the time and labor required for cleaning and disinfecting the upright 50 are reduced. can do.

  Further, since the magnetic gear device 70 rotates the stand 50 by transmitting torque, a conventional treatment instrument stand mechanism (for example, Japanese Patent Application Laid-Open No. 2007-61220) that changes the posture of the stand using repulsion or adsorption of magnetic force. The power from the drive source can be reliably transmitted to the stand 50 as compared to the publication and Japanese Patent Application Laid-Open No. 2007-135881.

  Further, in the magnetic gear device 70, the first magnetic force generation surface 72 and the second magnetic force generation surface 76 are disposed to face each other, so that the torque transmitted from the drive source to the rotation shaft 58 can be efficiently transmitted to the rotation shaft 52. it can.

  Further, since the magnetic gear device 70 includes the first magnetic force generation surface 72 in a direction orthogonal to the axial direction of the rotation shaft 58 and the second magnetic force generation surface 76 in a direction orthogonal to the axial direction of the rotation shaft 52, The first magnetic force generation surface 72 and the second magnetic force generation surface 76 can be arranged to face each other, so that the torque transmitted from the drive source to the rotation shaft 58 can be efficiently transmitted to the rotation shaft 52.

  Further, in the treatment instrument erecting mechanism 120 according to the first embodiment, the first surface 46A of the partition wall 46 is parallel to the first magnetic force generation surface 72, and the second surface 46B of the partition wall 46 is connected to the second magnetic force generation surface 76. Since it is parallel, the process of the partition 46 becomes unnecessary and the magnetic gear apparatus 70 can be easily mounted | worn with the front-end | tip part main body 40. FIG.

[Configuration of Treatment Instrument Standing Mechanism 130 According to Second Embodiment]
FIG. 9 is a schematic configuration diagram of the treatment instrument erecting mechanism 130 according to the second embodiment, and the treatment instrument erecting mechanism 130 includes a magnetic gear device 80 according to the second embodiment. Note that members having the same or similar functions as those of the treatment instrument erecting mechanism 120 and the magnetic gear device 70 shown in FIG.

  In the magnetic gear device 80 of the treatment instrument erecting mechanism 130, the first magnetic force generation surface 72 of the first magnetic gear 74 is provided on the outer peripheral surface of the convex portion 82 provided coaxially with the rotation shaft 58. Further, the second magnetic force generating surface 76 of the second magnetic gear 78 is provided on the inner peripheral surface of the concave portion 84 provided coaxially with the rotating shaft 52. The convex portion 82 on the first magnetic gear 74 side is inserted and disposed in the concave portion 84 on the second magnetic gear 78 side, so that the first magnetic force generating surface 72 and the second magnetic force generating surface 76 are interposed via the partition wall 46. Are opposed to each other.

  Further, the convex portion 82 on the first magnetic gear 74 side is inserted into the inner peripheral space portion 46D of the protruding portion 46C of the partition wall 46 protruding to the upright stand accommodating chamber 44 side, and the outer peripheral portion 46E of the protruding portion 46C of the partition wall 46. A recess 84 of the second magnetic gear 78 is inserted into the second magnetic gear 78.

<Effect>
According to the magnetic gear device 80, the first magnetic force generating surface 72 provided on the outer peripheral surface of the convex portion 82 coaxial with the rotary shaft 58 and the inner peripheral surface of the concave portion 84 coaxial with the rotary shaft 52 are provided. By arranging the second magnetic force generation surface 76 so as to face the projecting portion 46 </ b> C of the partition wall 46, the torque transmitted from the drive source to the rotating shaft 58 can be efficiently transmitted to the rotating shaft 52.

  Further, according to the treatment instrument erecting mechanism 130 according to the second embodiment, it is necessary to process the protruding portion 46C in the partition wall 46, but depending on the arrangement form of the first magnetic force generation surface 72 and the second magnetic force generation surface 76, That is, the arrangement in which the direction of the magnetic force is perpendicular to the axis of the rotary shafts 52 and 58 eliminates the force that the rotary shaft 58 and the rotary shaft 52 attract in the axial direction due to the magnetic force. As a result, it is possible to reduce a load in the thrust direction (axial direction of the rotation shafts 52 and 58) applied to the bearing 47 that supports the rotation shaft 58 and the bearing 45 that supports the rotation shaft 52.

  As another form of the magnetic gear device 80, a first magnetic force generation surface 72 of the first magnetic gear 74 is provided on the inner peripheral surface of a recess provided coaxially with the rotation shaft 58, and the second magnetic gear 78 The second magnetic force generation surface 76 may be provided on the outer peripheral surface of the convex portion provided coaxially with the rotation shaft 52. In this embodiment, the convex portion on the second magnetic gear 78 side is inserted and disposed in the concave portion on the first magnetic gear 74 side, and the first magnetic force generating surface 72 and the second magnetic force generating surface 76 are opposed to each other through the partition wall 46. Deploy. Further, the convex portion on the second magnetic gear 78 side is inserted into the inner peripheral space portion of the protruding portion of the partition wall 46 protruding to the upright lever housing chamber 56 side, and the first magnetic field is formed on the outer peripheral portion 46E of the protruding portion of the partition wall 46. The recess of the gear 74 is inserted.

[Configuration of Treatment Instrument Standing Mechanism 140 According to Third Embodiment]
FIG. 10 is a schematic configuration diagram of a treatment instrument erecting mechanism 140 according to the third embodiment, and the treatment instrument erecting mechanism 140 includes a magnetic gear device 90 according to the third embodiment. Note that members having the same or similar functions as those of the treatment instrument erecting mechanism 120 and the magnetic gear device 70 shown in FIG.

  The magnetic gear device 90 of the treatment instrument erecting mechanism 140 does not have the bearing 45 (see FIG. 5) that supports the rotary shaft 52, and the stand 50 is arranged via a shaft 92 that is arranged coaxially with the rotary shaft 52. Is rotatably supported by the partition wall 48 of the tip end body 40.

<Effect>
According to the treatment instrument standing mechanism 140 according to the third embodiment, since the stand 50 is supported by the partition wall 48 via the shaft 92, the stand 50 can be smoothly rotated around the rotation shaft 52.

[Configuration of the treatment instrument stand-up mechanism 150 according to the fourth embodiment]
FIG. 11 is a schematic configuration diagram of a treatment instrument erecting mechanism 150 according to the fourth embodiment. This treatment instrument erecting mechanism 150 includes the magnetic gear device 100 according to the fourth embodiment. Note that members having the same or similar functions as those of the treatment instrument erecting mechanism 120 and the magnetic gear device 70 shown in FIG.

  The treatment instrument erecting mechanism 150 according to the fourth embodiment is provided with an erecting storage chamber 44 in a cap 42 that is detachably attached to the distal end portion main body 40, and the erecting storage chamber 44 has a rotating shaft 52. 50 and a second magnetic gear 78 are provided. The rotating shaft 52 is supported by a bearing 45 provided on the bottom surface 42 </ b> B of the cap 42 located in the upright stand accommodating chamber 44.

<Effect>
According to the treatment instrument erecting mechanism 150 according to the fourth embodiment, the cap 42 can be removed from the distal end body 40, and the erecting base 50, the rotary shaft 52, and the second magnetic gear 78 can be cleaned together with the cap 42. Further, the cleanability and disinfection of these members are further improved.

[Configuration of Treatment Instrument Standing Mechanism 160 According to Fifth Embodiment]
FIG. 12 is a schematic configuration diagram of a treatment instrument erecting mechanism 160 according to the fifth embodiment. The treatment instrument erecting mechanism 160 includes the magnetic gear device 110 according to the fifth embodiment. In describing the treatment instrument stand-up mechanism 160, there is a portion overlapping with the description of the treatment tool stand-up mechanism 130 shown in FIG. 9, but the treatment tool stand-up mechanism 160 and the treatment instrument stand-up mechanism 130 are different forms, so Even so, the explanation will be repeated. In describing the treatment instrument standing mechanism 160, members having the same or similar functions as the treatment instrument standing mechanism 130 will be described with the same reference numerals.

  The treatment instrument erecting mechanism 160 according to the fifth embodiment includes a rotating shaft 58 accommodated in an erecting lever accommodating chamber 56 and connected to a drive source, and an erecting stand 50 accommodated in the erecting stand accommodating chamber 44. . In the magnetic gear device 110 according to the fifth embodiment, the rotary shaft 58 and the upright stand 50 are magnetically contactlessly connected via the partition wall 46, and the rotational force transmitted from the drive source to the rotary shaft 58 is raised. It is a device that transmits to the base 50.

  In addition, the magnetic gear device 110 according to the fifth embodiment is provided on the rotating shaft 58, provided with the first magnetic gear 74 having the first magnetic force generation surface 72, and provided on the stand 50. A second magnetic gear 78 having a second magnetic force generation surface 76 opposed to the first magnetic force generation surface 72.

  Further, the first magnetic force generation surface 72 of the first magnetic gear 74 is provided on the outer peripheral surface of the convex portion 82 provided coaxially with the rotary shaft 58, and the second magnetic force generation surface 76 of the second magnetic gear 78 is It is provided on the inner peripheral surface of the recess 84 provided on the stand 50 side. And the convex part 82 by the side of the 1st magnetic gear 74 is arrange | positioned by inserting in the recessed part 84 by the side of the stand 50, and the 1st magnetic force generation surface 72 and the 2nd magnetic force generation surface 76 are opposingly arranged.

  Further, the convex portion 82 on the first magnetic gear 74 side is inserted into the inner peripheral space portion 46D of the protruding portion 46C of the partition wall 46 protruding to the upright stand accommodating chamber 44 side, and the outer peripheral portion 46E of the protruding portion 46C of the partition wall 46. A recess 84 of the second magnetic gear 78 is inserted into the second magnetic gear 78.

<Effect>
According to the treatment instrument standing mechanism 160 according to the fifth embodiment, the rotating shaft 58 and the stand 50 are connected magnetically in a non-contact manner via the partition wall 46 by the magnetic gear device 110 according to the fifth embodiment. Therefore, the rotational force transmitted from the drive source to the rotary shaft 58 is transmitted to the upright base 50 without providing a through hole through which the rotary shaft 58 is disposed, and the upright base 50 is rotated around the rotary shaft 58. It can be rotated to change its posture between the standing position and the lying position. Therefore, according to the treatment instrument erecting mechanism 160 according to the fifth embodiment, since the through hole of the partition wall 46 can be eliminated, the time and labor required for the cleaning / disinfecting process for the upright 50 can be reduced.

  In addition, according to the magnetic gear device 110 according to the fifth embodiment, the first magnetic force generation surface 72 provided on the outer peripheral surface of the convex portion 82 coaxial with the rotation shaft 58 and the concave portion 84 on the stand 50 side. The torque transmitted from the drive source to the rotating shaft 58 can be efficiently transmitted to the stand 50 by disposing the second magnetic force generation surface 76 provided on the inner peripheral surface so as to face each other via the partition wall 46. .

  According to the magnetic gear device 110 according to the fifth embodiment, it is necessary to process the protrusion 46C in the partition wall 46. However, depending on the arrangement form of the first magnetic force generation surface 72 and the second magnetic force generation surface 76, that is, the magnetic force Is arranged in the direction orthogonal to the axis of the rotary shaft 58, the force that the rotary shaft 58 and the stand 50 are attracted in the axial direction by the magnetic force is eliminated. Thereby, the burden of the thrust direction (axial center direction of the rotating shaft 58) concerning the bearing 47 which supports the rotating shaft 58 can be reduced. Further, the protruding portion 46 </ b> C can be used as a bearing that supports the stand 50. Therefore, the bearing 45 (refer FIG. 9) which supports the stand 50 can be eliminated.

  In the above embodiment, the push / pull force of the operation wire 26 by the operation lever 30 is exemplified as the drive source of the rotating shaft 58, but the present invention is not limited to this. For example, as another drive source, an electric system that electrically rotates the rotary shaft 58 may be employed. In this case, it is preferable to incorporate the electric motor in the tip body 40.

  In the above embodiment, as a mechanism for rotating the rotating shaft 58, a mechanism for rotating the upright stand raising lever 54 by pushing and pulling the operation wire 26 is illustrated, but the present invention is not limited to this. For example, the drive source and the rotary shaft 58 are connected via a gear mechanism composed of a rack and pinion, a gear mechanism composed of a worm and a worm wheel, or a bevel gear mechanism, and the rotational force of the drive source is coupled via the gear mechanism. The rotating shaft 58 may be rotated.

  In the above embodiment, the side-view endoscope 10 has been described as an example. However, if the endoscope is provided with an upright stand that adjusts the leading direction of the treatment instrument at the distal end portion of the insertion portion, direct viewing is performed. The present invention can be applied to various endoscopes such as mirrors.

DESCRIPTION OF SYMBOLS 10 Endoscope 12 Insertion part 14 Operation part 16 Universal code 18 Tip part 20 Bending part 22 Flexible part 24 Treatment tool insertion channel 26 Operation wire 28 Angle knob 30 Operation lever 32 Air supply / water supply button 34 Suction button 36 Treatment tool introduction port 38 Treatment tool outlet 40 Front end body 42 Cap 42A Opening window 42B Bottom surface 44 Standing chamber accommodating chamber 45 Bearing 46 Partition wall 46A First surface 46B Second surface 46C Projection portion 46D Inner peripheral space portion 46E Outer periphery portion 47 Bearing 48 Partition wall 50 Standing base 52 Rotating shaft 54 Standing stand erecting lever 56 Standing lever accommodating chamber 58 Rotating shaft 60 Optical system accommodating chamber 62 Illuminating window 64 Observation window 66 Connecting portion 68 Wire insertion hole 69 Air / water feeding nozzle 70, 80, 90, 100, 110 Magnetic gear Device 72 First magnetic force generating surface 74 First magnetic gear 76 Second magnetic force generating surface 78 Second magnetic gear 2 protrusion 84 recess 92 the axis 120,130,140,150,160 instrument raising mechanism

Claims (10)

An insertion portion having a distal end and a proximal end;
A distal end portion body provided on the distal end side of the insertion portion;
A first storage chamber provided in the tip body and sealed from outside air;
A second storage chamber provided in the tip body and communicated with outside air;
A partition wall provided in the tip body and provided between the first storage chamber and the second storage chamber;
A first rotating shaft housed in the first housing chamber and connected to a drive source;
A treatment instrument stand that is housed in the second housing chamber and has a second rotating shaft;
The first rotating shaft and the second rotating shaft are connected magnetically in a non-contact manner via the partition, and the rotational force transmitted from the drive source to the first rotating shaft is transmitted to the second rotating shaft. A magnetic gear device to
An endoscope comprising: The magnetic gear device includes:
A first magnetic gear provided on the first rotating shaft and having a first magnetic force generation surface;
A second magnetic gear provided on the second rotating shaft and having a second magnetic force generation surface opposed to the first magnetic force generation surface of the first magnetic gear;
The endoscope according to claim 1, comprising: The first rotating shaft and the second rotating shaft are arranged coaxially,
The first magnetic force generation surface of the first magnetic gear is provided in a direction orthogonal to the axial direction of the first rotation shaft;
The second magnetic force generation surface of the second magnetic gear is provided in a direction orthogonal to the axial direction of the second rotation shaft;
The first magnetic force generation surface and the second magnetic force generation surface are arranged to face each other with the partition wall interposed therebetween.
The endoscope according to claim 2. A first surface of the partition facing the first magnetic force generation surface is provided in parallel with the first magnetic force generation surface;
A second surface of the partition wall facing the second magnetic force generation surface is provided in parallel with the second magnetic force generation surface;
The endoscope according to claim 3. The first magnetic force generation surface of the first magnetic gear is provided on an outer peripheral surface of a convex portion provided coaxially with the first rotation shaft,
The second magnetic force generation surface of the second magnetic gear is provided on an inner peripheral surface of a recess provided coaxially with the second rotation shaft,
The convex portion on the first magnetic gear side is inserted and disposed in the concave portion on the second magnetic gear side, so that the first magnetic force generation surface and the second magnetic force generation surface face each other through the partition wall. Arranged,
The endoscope according to claim 2. The convex portion on the first magnetic gear side is inserted into an inner peripheral space portion of the protruding portion of the partition wall protruding to the second storage chamber side,
The concave portion of the second magnetic gear is inserted into the outer peripheral portion of the protruding portion of the partition wall,
The endoscope according to claim 5. The treatment instrument stand is rotatably supported by the distal end portion main body via a shaft disposed coaxially with the second rotation shaft.
The endoscope according to any one of claims 1 to 6. The tip body includes a cap that is detachable from the tip body.
The cap is provided with the second storage chamber;
The treatment instrument stand having the second rotation shaft and the second magnetic gear are provided in the second storage chamber,
The endoscope according to claim 2. An insertion portion having a distal end and a proximal end;
A distal end portion body provided on the distal end side of the insertion portion;
A first storage chamber provided in the tip body and sealed from outside air;
A second storage chamber provided in the tip body and communicated with outside air;
A partition wall provided in the tip body and provided between the first storage chamber and the second storage chamber;
A rotating shaft housed in the first housing chamber and connected to a drive source;
A treatment instrument stand accommodated in the second accommodation chamber;
A magnetic gear device that connects the rotary shaft and the treatment instrument stand in a magnetically non-contact manner via the partition wall, and transmits the rotational force transmitted from the drive source to the rotary shaft to the treatment tool stand. When,
An endoscope comprising: The magnetic gear device includes:
A first magnetic gear provided on the rotating shaft and having a first magnetic force generation surface;
A second magnetic gear provided on the treatment instrument stand and having a second magnetic force generation surface opposed to the first magnetic force generation surface of the first magnetic gear;
Have
The first magnetic force generation surface of the first magnetic gear is provided on an outer peripheral surface of a convex portion provided coaxially with the rotation shaft,
The second magnetic force generation surface of the second magnetic gear is provided on an inner peripheral surface of a recess provided on the treatment instrument stand.
The convex portion on the first magnetic gear side is inserted and arranged in the concave portion on the treatment instrument stand, so that the first magnetic force generation surface and the second magnetic force generation surface are arranged to face each other.
The convex portion on the first magnetic gear side is inserted into an inner peripheral space portion of the protruding portion of the partition wall protruding to the second storage chamber side,
The concave portion on the treatment instrument stand base side is inserted into the outer peripheral portion of the protruding portion of the partition wall,
The endoscope according to claim 9.

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