JP6538146B2 - Endoscope - Google Patents

Description

  The present invention relates to an endoscope, and more particularly to a stand of a treatment tool and a structure of a distal end portion of an endoscope provided with a stand mechanism of the stand.

  In the endoscope, various treatment tools are inserted into the treatment tool insertion port provided in the operation unit, and are led out from the treatment tool lead-out port opened in the distal end portion and used for treatment. For example, a guide wire or an imaging tube in a duodenum, a puncture needle in an ultrasound endoscope, and a treatment tool such as a forceps or a snare are used in a direct endoscope and a stroboscope. Such a treatment tool needs to change the lead-out direction at the tip end to treat a desired position in the subject, and for this reason, a treatment tool rising mechanism (raising stand) is provided at the tip end.

  As such a treatment tool standing-up mechanism, a wire is attached to a standing-up stand, a wire is extended to the base end side of an endoscope, and a standing-up stand is carried out by pushing and pulling the wire by the operation lever provided in the operation part. There is known a mechanism for rotating the rotary shaft around the rotation axis to change the position between the upright position and the collapsed position. In addition, the pivot shaft of the stand is connected to the lever housed via the partition wall, a wire is attached to the lever, and the stand is rotated by pushing and pulling the wire with the operation lever provided on the operation unit. There is also known a mechanism (lever type) that rotates around an axis and changes the position between the upright position and the collapsed position.

  Since the tip portion provided with such a treatment tool rising mechanism becomes complicated in shape and structure, the cleaning property is improved such as the penetration of the disinfectant, the penetration of the cleaning brush (the reach of the brush tip), or the drainage property. And, the ease of cleaning work is required. And the endoscope which made the cap and stand of a tip part removable conventionally was known (for example, refer to patent documents 1). In such an endoscope, the cap and the stand are removed after the treatment to clean the tip.

Japanese Patent Application Laid-Open No. 6-315458

  However, in the endoscope described in Patent Document 1, since the raising pin and the raising pin slit are open on the proximal end side of the distal end, depending on the degree of the slit, the rising stand is on the tip end during operation There is a risk of falling off. In order to prevent this, it is necessary to set the slot of the raising pin tightly, but since the elevator is small and it is difficult to apply a large force at the time of attachment or detachment, if the slot is tightened, the workability of disassembly and assembly of the tip Is worse.

  The present invention has been made in view of such circumstances, and it is an object of the present invention to provide an endoscope having good workability in disassembling and assembling the tip.

  In order to achieve the above object, an endoscope according to a first aspect of the present invention has an insertion portion having a distal end and a proximal end, and an operation member, and an operation portion provided on the proximal end side of the insertion portion And a tip end main body provided on the tip end side of the insertion portion, having a front surface, an upper surface, and a lower surface, an upright base rotatably provided on the tip end main body, and a non-circular cross section perpendicular to the axial direction A rotary shaft for rotating the stand and a rotary bearing portion provided on the stand, the rotary shaft having a rotary shaft receiving groove opening on the opposite side to the lower surface when the stand is attached to the tip end main body It has a bearing part, a rising stand raising mechanism for rotating the rotation shaft, a base end side connecting part connected to the operating member, and a tip side connecting part connected to the rising base raising mechanism, and the operation of the operating member Operation wire that rotates the rotation axis by being pulled and pulled to raise the stand An erecting table accommodation slit provided in the distal end body and forming a space for accommodating the erection table, the erecting pedestal accommodation slit extending from the upper surface of the distal end body to the lower surface through the front surface and opened; It is a cap which is detachably provided to the main body, and in a state where the cap is attached to the tip end main body, an opening window which opens the opening on the upper surface side of the stand housing accommodation slit and a partition which closes the opening on the lower surface side. A cap having a portion, and in a state in which the cap is attached to the tip end body, the thickness between the bottom surface of the rotary shaft receiving groove in the rotation bearing portion and the surface facing the lower surface of the tip portion body is a Assuming that the gap distance between the rotary shaft and the partition of the cap is b, the depth of the rotary shaft receiving groove is c, and the thickness of the proximal end of the rotary bearing is d, the following conditional expression ( 1) to (3) are satisfied.

a <b (1)
a + c> b (2)
b> d (3)
The term "base end side thickness" of the rotary bearing means the distance from the side wall surface on the base end side of the rotary shaft receiving groove to the base end of the stand.

  According to the first aspect of the present invention, at the time of normal operation, the lower surface side opening of the rising stand accommodation slit is closed by the partition of the cap, and the rotary bearing of the rising stand has the rising stand attached to the tip body. In this case, since the rotary shaft accommodation groove opens on the opposite side to the lower surface, the stand does not structurally come off at the angle of the stand when raising the treatment tool, and the rotary shaft and the rotary bearing portion There is no need to wear too tight. Therefore, the amount of working force at the time of disassembly and assembly of the tip can be set appropriately, and the workability of disassembly and assembly is improved. Also, this allows the tip to be cleaned quickly and easily.

  In the endoscope according to the second aspect, in the first aspect, the raising stand raising mechanism has a raising stand raising lever connected to the rotation shaft, and the distal end side connection portion of the operation wire is a raising stand raising lever The operation wire is connected to the operation wire and is pushed and pulled by the operation of the operation member to rotate the rotation shaft via the rising plate rising lever to displace the rising plate.

  The second aspect shows one aspect of the stand displacement mechanism.

  As described above, according to the endoscope of the present invention, the workability of disassembling and assembling the tip portion is good.

BRIEF DESCRIPTION OF THE DRAWINGS It is a figure which shows the whole structure of the endoscope which concerns on one Embodiment of this invention. It is a perspective view showing the composition of the tip part of the endoscope concerning one embodiment of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS It is a figure which shows the tip part of the endoscope which concerns on one Embodiment of this invention, (a) is a figure which shows a mode that it saw from the tip direction, (b) is a figure which shows the mode seen from upper. In the endoscope which concerns on one Embodiment of this invention, it is a figure which shows a mode that a standup stand lever and a standup are couple | bonded. The endoscope which concerns on one Embodiment of this invention WHEREIN: It is a figure which shows the shape of a stand raising lever. The endoscope which concerns on one Embodiment of this invention WHEREIN: It is a figure which shows the shape of a stand. The endoscope which concerns on one Embodiment of this invention WHEREIN: It is sectional drawing which shows the front-end | tip part in the state with which the standing stand raising lever and the standing stand were combined. It is the elements on larger scale of sectional drawing shown in FIG. It is a figure which shows a mode that the front-end | tip part of the endoscope which concerns on one Embodiment of this invention was seen from the side direction (raising stand raising lever side). It is another figure which shows a mode that the front-end | tip part of the endoscope which concerns on one Embodiment of this invention was seen from the side direction. It is still another figure which shows a mode that the front-end | tip part of the endoscope which concerns on one Embodiment of this invention was seen from the side direction. It is a conceptual diagram which shows the stopper mechanism of a standing stand provided in the operation part of the endoscope which concerns on one Embodiment of this invention. It is a figure which shows the example of the stand which concerns on another invention. It is a figure which shows the other example of the stand which concerns on another invention. It is a figure which shows the further another example of the stand which concerns on another invention.

  An endoscope according to the present invention will be described below with reference to the accompanying drawings. FIG. 1 is a diagram showing an entire configuration of an endoscope 10 according to a first embodiment.

First Embodiment
<Overall Configuration of Endoscope>
As shown in FIG. 1, the endoscope 10 includes an insertion portion 12 which is inserted into the body of a subject, and the 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 (not shown), an image processing device (processor), etc. via the universal cord 16.

<Overall Configuration of Insertion Unit>
The insertion portion 12 is configured by sequentially connecting a distal end portion 12a, a bending portion 12b, and a flexible portion 12c from the distal end side toward the proximal end side (the operation portion 14 side). A bending prevention member of the insertion portion 12 is provided on the most proximal side of the flexible portion 12c.

<Configuration of Operation Unit>
In the operation unit 14, an operation lever 20 for displacing (raising or folding) the angle knob 18 and the stand 46 (refer to FIGS. 2, 4, 6 to 11) for performing a bending operation of the bending portion 12 b, insertion An air supply / water supply button 21a, a suction button 21b, and the like are provided to eject air, water, and the like from an air supply / water supply nozzle provided at the tip of the section 12. The operation lever 20 is an example of an operation member for operating the stand according to the present invention. In addition, on the insertion portion 12 side of the operation portion 14, a treatment instrument introduction port 22 for introducing various treatment instruments is provided.

  Further, in response to the operation of the air supply / water supply button 21a, air or water is supplied from the air supply / water supply device built in the light source device (not shown), and the observation window 36 (FIGS. (See)). On the other hand, in response to the operation of the suction button 21b, suction is performed through an opening (not shown) provided in the tip portion 12a. The tip of the treatment tool inserted into the treatment tool inlet 22 is drawn out from the opening of the tip 12a through a forceps channel (not shown) communicating with the treatment tool inlet 22 and operates the operation lever 20 to raise the stand 46. The direction of the treatment tool can be changed by displacing (raising or falling).

<Structure of flexible part>
The flexible portion 12c is a helical tube formed by helically winding a thin strip having an innermost elasticity, and covers the outer side of the helical tube by covering a metal wire-knitted mesh, and a metal cap at both ends Are fitted into a tubular body, and an outer shell made of resin is laminated on the outer peripheral surface of the tubular body.

<Structure of Curved Portion>
Angled rings (not shown) are pivotally connected to each other to form a structure, and the outer periphery of this structure is covered with a mesh woven with metal wires, and further covered with a rubber shell. It has a structure that Further, a plurality of wires (not shown) extend from the angle knob 18 of the operation unit 14 to the bending portion 12b, and the tip of these wires is fixed to the tip of the angle ring constituting the bending portion 12b. Thereby, in response to the operation of the angle knob 18, the bending portion 12b is bent vertically and horizontally.

<Configuration of tip>
FIG. 2 is an exploded perspective view showing the structure of the distal end portion 12a according to the present embodiment. As shown in FIG. 2, the tip 12 a has a cap 32 that covers the tip body 30. The cap 32 has an opening 32A for opening the opening 38a on the upper surface side of the rising stand accommodation slit 38 (see FIGS. 2 to 4) in the state of being attached to the tip end main body 30, and an opening 38c on the lower surface. The partition part 32B to be closed is formed, and in the state where the cap 32 is attached, the fall of the stand 46 is regulated by the partition part 32B. The cap 32 is made of an elastic material, such as silicon rubber, and the small diameter portion with a small inner diameter provided at the base end of the cap 32 is fitted in the groove formed in the tip end main body 30 to obtain the cap 32. Is detachably mounted to the tip end main body 30.

  The tip end main body 30 is made of a corrosion-resistant metal such as stainless steel, and a rising stand accommodation slit 38 (see FIGS. 2 to 4) is provided at the center position of the tip end main body 30. The rising stand accommodation slit 38 forms a space for receiving the rising stand 46, and as shown in FIGS. 3 and 4, the upper surface of the tip end main body 30 (the outlet side of the forceps starting from the rotation axis of the rising stand 46) Openings 38a, 38b and 38c extend from the front surface (the tip side of the tip portion main body 30) to the lower surface (the side opposite to the forceps outlet direction starting from the rotation shaft 42a). Further, the tip end portion main body 30 has a pair of side wall portions 41 a and 41 b facing each other with the rising stand accommodation slit 38 interposed therebetween.

  In FIGS. 2 to 4, in order to clearly show the openings 38 a, 38 b and 38 c, the illustration of the cap 32, the raising stand raising lever 42, the raising stand 46 and the like is appropriately omitted.

  Thus, in the endoscope 10 according to the present embodiment, since the openings 38a, 38b and 38c extending from the upper surface to the lower surface through the front surface are formed in the rising stand accommodation slit 38, the exposure of the rising stand 46 is The range is wide, the workability of disassembling and assembling the tip 12a (mounting, removal, and the like of the raising stand 42 and the raising stand 46) is good, and the tip 12a can be cleaned quickly and easily.

  Further, a treatment instrument insertion channel (not shown) is communicated with the stand housing accommodation slit 38. The treatment instrument insertion channel is inserted into the insertion portion 12 of the endoscope 10 and connected to the treatment instrument inlet 22 of the operation unit 14. As a result, when the treatment tool is inserted from the treatment tool introduction port 22 into the treatment tool insertion channel, the treatment tool is guided to the upright stand accommodation slit 38. The guided treatment tool is erected by the stand 46 and is drawn upward from the opening window 32A.

  An erecting lever accommodating chamber 40 is provided on the side opposite to the erecting table 46 at one side wall portion 41 a of the erecting table accommodating slit 38, and the erecting table 46 is pivoted inside the erecting lever accommodating chamber 40. A stand for raising a stand 42 is accommodated. Further, an optical system storage chamber 47 is provided on the side wall portion 41 b on the opposite side of the rising lever housing chamber 40 with the rising stand housing slit 43 interposed therebetween.

  The optical system storage chamber 47 is closed by attaching a protective cover (not shown) to the tip end main body 30. The joint surfaces of the tip end main body 30 and the protective cover are joined via a sealing agent, whereby the gap between the tip end main body 30 and the protective cover is sealed, and the airtightness of the optical system storage chamber 47 is maintained.

  The irradiation window 34 and the observation window 36 are disposed on the top of the optical system storage chamber 47, and an air / water supply port (not shown) is provided toward the observation window 36. The air supply / water supply port is connected to an external device via an air supply / water supply tube (not shown) inserted into the insertion unit 12, and by operating the air / water supply button 21 a of the operation unit 14, Compressed air or water is jetted from the air / water supply port toward the observation window 36, and the observation window 36 is cleaned. The irradiation window 34, the observation window 36, and the air / water supply port are provided at positions facing the opening window 32A when the cap 32 is covered on the tip end main body 30. Hereinafter, the surface on which the observation window 36 is disposed is the upper surface, and the observation direction observed from the observation window 36 is the upper direction.

  Inside the optical system accommodation chamber 47, a photographing optical system and an illumination optical system (not shown) are accommodated. The illumination optical system includes an illumination lens (not shown) disposed inside the illumination window 34, and a light guide disposed so that the tip of the illumination lens faces the illumination lens. The light guide is inserted into the insertion portion 12 of the endoscope 10, and its proximal end is connected to a light source device (not shown). Thereby, the irradiation light from the light source device is transmitted through the light guide and is irradiated upward from the irradiation window 34.

  The photographing optical system includes an objective lens disposed inside the observation window 36, and a CCD unit (Charge Coupled Device unit) (not shown) disposed behind the objective lens via a prism. Is connected to an image processing apparatus (not shown) via a cable. An object image taken in from the observation window 36 is converted into an electric signal by the photographing optical system, transmitted to an image processing apparatus (processor) connected to the endoscope 10, and the object is transmitted to the monitor via the image processing apparatus. The image is displayed.

  On the other hand, the rising lever storage chamber 40 is closed by covering the tip end main body 30 with a protective plate (not shown). The protective plate is screwed to the distal end portion main body 30 at a plurality of locations (not shown), and the gap between the protective plate and the distal end portion main body 30 is filled with a sealing agent. Thus, the airtightness of the rising lever storage chamber 40 is maintained.

<Arrangement of erecting stand and lever>
A raising stand raising lever 42 is provided inside the raising lever storage chamber 40 (see FIGS. 2 and 4). As shown in FIG. 4, the rotary shaft 42 a provided at the lower end of the elevator stand 42 is inserted into the circular hole 41 and rotatably supported with respect to the distal end main body 30 to rotate the rotary shaft of the elevator 46. Configure.

  FIG. 5 is a view showing the shape of the rising stand rising lever 42. As shown in FIG. As shown in parts (a) and (b) of FIG. 5, the stand raising lever 42 has a rotary shaft 42a having a circular cross section, and the tip of the rotary shaft 42a is perpendicular to the rotary shaft 42a. An axial tip portion 42b having a rectangular cross section in the direction is formed.

  6 shows the shape of the stand 46. As shown in FIG. As shown in FIGS. 4 and 6, the stand 46 is provided with a rotary bearing 46 a. The rotation bearing portion 46a has a rotation shaft accommodation groove 46b opened on the side opposite to the lower surface (upper surface side) when the rising base 46 is attached to the tip portion main body 30, and the rotation shaft accommodation groove 46b The rising end of the stand 42 is formed in a rectangular shape large enough to accommodate the shaft tip portion 42b. Therefore, the shaft end portion 42 b of the rising table rising lever 42 is engaged with the rotary bearing portion 46 b of the rising table 46, and the rising table rising lever 42 is connected to the rising table 46 and integrally swings with the rising table 46. You will come to That is, in the present embodiment, the rising stand rising lever 42 constitutes a rising stand rising mechanism.

  Further, as shown in FIG. 4, the distal end side connecting portion 44a of the operation wire 44 is connected to the upper end portion 42c of the rising stand erecting lever 42, and the operation wire 44 is inserted into the insertion portion 12 and the proximal end side. The connecting portion is connected to the operating lever 20 of the operating portion 14. Therefore, when the operation lever 20 is turned, the operation wire 44 is pushed and pulled to rotate the rising stand 42 and, as a result, the rising stand 46 is displaced (rise or fall).

<The connection state of the rising stand and the rising stand>
FIG. 7 is a cross-sectional view showing the distal end portion 12a in a state in which the rising stand rising lever 42 and the rising stand 46 are coupled and the cap 32 is mounted on the distal end main body 30, FIG. 8 is a cross sectional view shown in FIG. FIG.

  As shown in FIGS. 7 and 8, in the endoscope 10 according to the present embodiment, the thickness between the bottom surface of the rotation shaft accommodation groove 46 b and the surface facing the lower surface of the tip end main body 30 is a, and rotation is The gap distance between the shaft 42a and the partition 32B of the cap 32 is b, and the depth of the rotary shaft receiving groove 46b is c, and the thickness of the proximal end of the rotary bearing 46a (the tip side of the stand 46 and Assuming that the distance between the side wall surface on the base end side of the rotary shaft accommodation groove 46b and the base end of the stand 46 is d in the direction connecting the base end side (the left and right direction in the states shown in FIGS. The conditional expressions (1) to (3) of the above are satisfied.

a <b (1)
a + c> b (2)
b> d (3)
In the present embodiment, since the thickness a of the rotary shaft receiving groove 46b is smaller than the gap distance b between the rotary shaft 42a and the partition 32B of the cap 32 according to the conditional expression (1), Since the sum of the thickness a and the depth c of the rotary shaft accommodation groove 46b is larger than the gap distance b according to the conditional expression (2), the falling off is restricted in the lower surface direction of the stand 46. Therefore, the stand 46 does not structurally come off at an angle of the stand 46 when raising the treatment tool (a range in which the fall angle is smaller than a first fall position described later). Furthermore, since the thicknesses a and d of the stand are smaller than the gap distance b according to the conditional expressions (1) and (3), the stand 46 can be rotated while the cap 32 is attached to the tip end main body 30. The end 46c of the stand 46 is a curved surface whose distance from the rotation shaft accommodation groove 46b is equal to or less than d so that the end 46c does not contact the partition 32B of the cap 32 when the stand 46 is rotated. It is processed into a shape.

<Mounting and dismounting of stand>
As described above, at the angle of the stand 46 when raising the treatment tool, the stand 46 does not structurally dislodge, so removal of the stand 46 from the tip portion main body 30 In the normal use (a first position or a second position described later; see FIGS. 9 and 11). Further, mounting of the stand 46 to the tip end main body 30 accommodates the stand 46 in the stand housing slit 38 and causes the shaft end portion 42 b of the stand stand lever 42 to be fitted to the rotary bearing 46 b of the stand 46. (See Figure 4). Such mounting of the stand 46 can also be performed in a state corresponding to the first position or the second position.

<Fall position of the stand>
In FIG. 9, the stand 46 is in the first position (the cap 32 is attached to the tip end portion 30 and the stand 46 is in the position just before the stand 46 falls to the tip side and abuts against the partition 32B of the cap 32). It is a figure showing tip part 12a in a state. As described above, the endoscope 10 is used with the protection lever covering chamber 40 covered with a protection plate. However, in FIG. 9, the illustration of the protection plate is omitted in order to clearly show the fallen state of the elevation stand elevation lever 42, The standing lever accommodating chamber 40 and the standing stand standing lever 42 grade | etc., Which are covered with a protective plate are shown by the dotted line (same in FIG. 10, 11). In addition, illustration of the cap 32 is abbreviate | omitted in FIG. 9, and the cap 32 is illustrated in FIG. As described above, the openings 38a, 38b and 38c are formed in the rising stand housing slit 38 and extend from the upper surface to the lower surface through the front surface, but as described above, the falling of the rising table 46 is a partition during normal use Since it is regulated by the portion 32B and a stopper mechanism 60 (described later) is further provided in the operation portion 14, it is prevented that the stand 46 falls to the lower surface side from the state shown in FIGS.

  On the other hand, in FIG. 11, the cap 32 has been removed, and the second operation (described later) of the operation lever 20 further raises the stand 46 to the opposite side to the standing position than the state of FIG. It shows a state of displacement (furrowing to the lower surface side) and being in the second reclining position. In the state of FIG. 11, the exposure (exposure of the side portion) of the stand 46 from the stand housing slit 38 is more than in the states of FIGS. The attachment / removal of the stand 46 to / from the tip end main body 30 can be performed quickly and easily.

<Lifting angle of rising stand and falling angle of rising stand>
As shown in FIG. 9, in the endoscope 10 according to the present embodiment, the fall angle θ1 of the stand 46 is the fall angle θ2 of the stand up lever 42 (a direction L orthogonal to the axial direction of the endoscope 10 It is larger than the reference angle) (θ1> θ2). If it is assumed that the lodging angle θ1 ≦ θ2, in order to make the stand 46 fall large (for example, to the second fall position shown in FIG. 11), it is necessary to make the stand rising lever 42 also largely lay down. In order to secure a rotation space for the stand erecting lever 42, the erecting lever accommodating chamber 40 has to be enlarged. However, in the endoscope 10 according to the present embodiment, by setting the inclination angles θ1 and θ2 to the relationship as described above, the inclination angle θ1 of the elevation base 46 is made larger than the inclination angle θ2 of the elevation base erect lever 42. Thus, it is possible to reduce the pivoting space of the erecting stand erecting lever 42, and to miniaturize the erecting lever accommodating chamber 40 and the distal end portion main body 30 including the same and the distal end portion 12a.

<Stopper mechanism>
Next, the stopper mechanism (locking mechanism) of the stand will be described. FIG. 12 is a conceptual view showing the structure of the stopper mechanism 60. As shown in FIG. As shown in FIG. 12, in the endoscope 10, a movable portion 62 that rotates about the axis AX in synchronization with the rotation operation of the operation lever 20 is provided in the operation portion 14, and the lower surface of the movable portion 62 A leaf spring 64 provided with a projection 64a is attached to the frame. On the other hand, a stopper 68 a is provided on the surface facing the movable portion 62 in the fixed portion 68 fixedly provided on the main body side of the operation portion 14.

  The stopper 68 a is provided at a position PMAX corresponding to the first reclining position of the stand 46. Therefore, one end of the rotation range of the stand 46 is restricted to the first reclining position by rotating the operation lever 20 to engage the projection 64a with the stopper 68a. Such operation of the control lever 20 is referred to as “first operation”.

  Therefore, in order to cause the stand 46 to fall beyond the first fall position, an operation different from the rotation operation in normal use (a force larger than normal is intentionally applied to the operation lever 20 to further fall the stand 46). Operation; hereinafter referred to as “the second operation”, the fall from the first fall position to the second fall position (the state shown in FIG. 11) is restricted, and the unintended fall of the stand 46 or this Damage to the cap 32 can be prevented. Further, by performing the second operation, the projection 64a gets over the stopper 68a and the locking of the both is released, whereby the stand 46 falls over the first position to the second position. In this state, the exposure of the stand 46 from the stand housing slit 38 (exposure of the side portion) is more than in the states of FIGS. 9 and 10, and the mounting / removal of the stand 46 to the tip end main body 30 is quick and easy. It can be carried out.

  In the stopper mechanism 60, the number and size of the projections 64a and the stoppers 68a may be determined in accordance with the magnitude of the required locking force.

<Effect of this embodiment>
As described above, in the endoscope 10 according to the present embodiment, attachment and removal of the stand 46 to and from the tip end main body 30 can be performed quickly and easily, and the workability of disassembling and assembling the tip end 12a Is good. In addition, this makes it possible to wash the tip 12a quickly and easily.

<Another invention>
Next, an endoscope as another invention other than the present invention will be described. In the embodiment of the present invention described above, the rotary shaft accommodation groove 46b of the stand 46 and the rotary shaft tip 42b of the stand lift lever 42 are fitted, but in another invention, the stand 46 and the stand The mode of connection with the standing lever 42 is different from the present invention. An example of the shape of the stand in this alternative invention is shown in FIGS. In the endoscope as another invention, the same configuration as that of the present invention can be adopted except for the shape of the stand, so the detailed description will be omitted.

  FIG. 13 is a view showing a stand 50 as another embodiment of the present invention. In the stand 50, the stand main body 50a and the clip 50b (circled part in FIG. 13) are integrated by adhesion or the like, and utilizing elastic deformation and biasing force on the rotation shaft tip 42b of the clip 50b. The stand 50 is attached to and fixed to the stand raising lever 42. Specifically, in the stand 50, the clip 50b is fitted to the shaft end 42b and attached to the stand raising lever 42. At this time, the clip 50b is elastically deformed by the rotation shaft end 42b and attached after attachment. The stand 50 can be fixed to the stand raising lever 42 in order to press the rotating shaft tip portion 42 b from the upper surface side and the lower surface side by the force. Further, the stand 50 can be removed from the stand raising lever 42 by causing the clip 50 b to be elastically deformed so as to be larger than the rotation shaft tip portion 42 b. Such attachment / removal and fixing modes are the same as in the stands 52 and 54 shown in FIGS.

  FIG. 14 is a view showing a stand 52 as another embodiment of the present invention. In the stand 52, the plate spring 52b is integrated with the stand main body 52a by welding, and the stand 52 is raised using the elastic deformation and the biasing force of the plate spring 52b with respect to the rotation shaft tip 42b. Attach and fix to 42.

  FIG. 15 is a view showing a stand 54 as still another embodiment of the present invention. In the stand 54, the leaf spring 54b is integrated with the stand main body 54a by screwing, and the stand 54 is raised using the elastic deformation and the biasing force of the leaf spring 54b with respect to the rotation shaft tip 42b. Attach and fix to the lever 42. The aspect shown in FIG. 15 can improve the strength more than the aspect of FIG.

  In the stands 50, 52, 54 of the above embodiment, the clip 50b and the plate springs 52b, 54b are elastically deformed by the rotary shaft tip 42b, so that mounting and removal to the shaft tip 42b is easy, and the tip 12a is disassembled The assembling workability is good, and the biasing force of the clip 50b and the plate springs 52b and 54b enables reliable fixation to the shaft tip portion 42b. In each aspect of the above-mentioned separate invention, the magnitudes of the elastic deformation and biasing force of the clip 50b and the plate springs 52b and 54b are determined by the ease of attachment / detachment and the strength of the fixation between the stands 50, 52 and 54 and the stand 42. It can be decided according to the demand for

  The present invention and other inventions are not limited to the embodiments described above, and various modifications can be made without departing from the spirit of each invention.

  DESCRIPTION OF SYMBOLS 10 ... Endoscope, 12 ... Insertion part, 12a ... Tip part, 12b ... Curved part, 12c ... Flexible part, 14 ... Operation part, 16 ... Universal code, 18 ... Angle knob, 20 ... Operation lever, 21a ... Air supply / water supply button 22, treatment tool inlet, 30: tip portion body, 32: cap, 32A: opening window, 32B: partition wall, 34: irradiation window, 36: observation window, 38: rising stand housing slit, 38a, 38b, 38c: Opening, 40: Upright lever storage chamber, 41a, 41b: Side wall, 42: Upright stand lever, 42a: Axis, 42b: Shaft tip, 42c: Upper end, 44: Operation wire, 46, 50, 52, 54: stand, 46a: rotation bearing portion, 46b: rotation shaft accommodation groove, 47: optical system accommodation chamber, 60: stopper mechanism, 62: movable portion, 64: leaf spring, 64a: projection, 68 ... fixed part, 6 a ... stopper

Claims (2)

A tip end main body provided on the tip end side of the insertion portion;
A rotating shaft provided in the tip end body;
A stand that is attachable to and detachable from the end of the rotary shaft at one end side of the rotary shaft and rotates with the rotation of the rotary shaft;
Equipped with
The stand is
A pair of elastically deformable gripping portions disposed opposite to each other with the tip end portion of the rotation shaft interposed therebetween;
A retaining portion provided on at least one gripping portion of the pair of gripping portions and protruding toward the other gripping portion;
Have
The endoscope by which the said stand and the said rotating shaft are comprised integrally rotatably by engaging with the to-be-engaged surface of the said rotating shaft front-end | tip part by a pair of said holding part. Each of the pair of grips is formed to extend in a direction orthogonal to the axial direction of the rotation shaft.
The endoscope according to claim 1.

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