JP5484393B2 - Endoscope operation unit - Google Patents

Description

  The present invention relates to an operation unit of an endoscope.

  The endoscope has an insertion portion and an operation portion following the insertion portion. The operation part is held by the practitioner, and the insertion part is inserted into the body of the subject. Various operation buttons such as an air / water supply button, a suction button, a remote switch button, and the like are attached to the operation unit. Such an operation button includes a main body and an operation cap. The main body is formed in a cylindrical shape, for example, and a switch is attached to one end. An operation cap is attached to the main body so as to cover the switch. The operation cap is made of rubber, for example, and the internal switch is turned on by elastic deformation caused by pressing. Further, by stopping the pressing on the operation cap, the switch is returned to the original state and turned off.

  When the operation button is attached to the case main body of the operation unit, it is necessary to ensure watertightness and airtightness so that liquid does not enter due to washing or dust does not enter. For this reason, an O-ring or a sealing material is loaded between the case body and, for example, as shown in Patent Documents 1 and 2, a nut is used to fasten and fix the operation member to the case body.

  For example, in Patent Document 1, a unit is inserted into the mounting hole of the case body from the inside of the case body, and a fixing nut is screwed into the case body from the outside of the case body to be fastened and fixed. Further, in Patent Document 2, contrary to Patent Document 1, a push button unit is inserted into the mounting hole of the case body from the outside of the case body, and a fixing nut is screwed into the case body from the inside of the case body. Tighten and fix. In Patent Document 3, the switch is inserted into the mounting hole from the outside of the case body, and then the push button switch is fixed to the case body from the inside of the case body using a switch plate and a fixing screw.

JP-A-8-56892 JP 2002-25387 A JP-A-8-191789

  In the above-mentioned Patent Documents 1 and 2, since a fixing nut is used, it is necessary to rotate and tighten the fixing nut. In particular, as in Patent Document 2, in the case where the fixing nut is arranged inside the case main body, it is necessary to rotate the fixing nut from a narrow gap in the case main body. It takes time to install and remove.

  In addition, as in Patent Document 1, when the fixing nut is disposed outside the case body, the push button unit is protruded outward from the mounting hole in a state where the push button unit is housed in the case body. In order to fasten the fixing nut to the male screw of the part, it is necessary to provide a moving space for attaching and removing the push button unit in the case body, which creates a wasteful space for the moving space in the case body It becomes an obstacle. During maintenance, after removing the fixing nut, it is necessary to push the push button unit inward from the outside of the case body, and then to push the push button unit out of the case body through the opening. Maintenance takes time.

  When a push button switch is attached from the inside of the case main body via a fixing screw as in Patent Document 3, a hole or opening for inserting a screwdriver for rotating the fixing screw is required in the case main body. Moreover, it is necessary to form a recessed portion that is easy to insert a driver in place of the hole or the opening. As described above, it is necessary to form a driver insertion hole, opening, recess, or the like in the case body, and the shape of the case body becomes complicated. Further, in addition to the need for a new cap for closing the hole or opening, the lid for closing the recess is complicated in a three-dimensional shape, unlike the plate-like two-dimensional shape.

  The present invention has been made in view of the above-mentioned problems. Operation members such as push button switches and switching valves, display members such as LEDs, caps and lids, and other various parts can be easily used in cases where space is limited. It is an object to provide an operation portion of an endoscope that can be attached to and detached from the endoscope.

The operation portion of the endoscope of the present invention includes a case main body having an opening and an attachment hole, a lid that is airtightly attached so as to close the opening of the case main body, and a first that faces the attachment hole from the outside to the inside of the case main body. an operating member which is inserted from the direction, is inserted from a second direction intersecting with respect to the first direction through the opening of the case body, engaged with the operating member protruding to the inside of the case body, the case body of the operating member and pulled out preventing member for preventing dropping off from, provided on the pull-out preventing member, and a contact portion which is brought into close contact with the operating member to the case main body, formed in the mounting hole, when the operating member from the first direction is inserted And an operation tube that is inserted into the attachment hole from the first direction, and an operation cap that is attached to one end of the attachment tube and is deformed by a pressing operation. Have

In addition, it is preferable that the operation member has an operation member main body, the attachment cylinder holds the operation member main body, and the operation cap is attached to one end of the attachment cylinder so as to cover the operation member main body . Moreover, it is preferable that the said operation cap has an edge part latched by the said latching step part in outer periphery.

Further, the pull-out preventing member is fixed wedge, the mounting cylinder is urged inwardly in the first direction by insertion of the fixed wedge, locking the edges to the engaging step portion A fixed wedge mounting groove.

The fixed wedge fitting groove has an inclined surface, urges the mounting cylinder by the inclined face by insertion from the second direction of the fixed wedge inwardly in the first direction, said edge portion The operation cap and the mounting hole are brought into tight contact with each other by being deformed in the locking step portion.

The fixed wedge is a U-shaped plate member having tapered leg plates at both ends of the connecting plate, and one side edge of the leg plate is formed obliquely, and the inclined surface is pressed by the pair of oblique side edges. Is preferred. Further, the fixed wedge is a U-shaped plate member in which leg plates having a curved projection in the middle are formed at both ends of the connecting plate, and the inclined surface is preferably pressed by the curved projection. And a screw mounting hole formed in the mounting cylinder at a position corresponding to the screw mounting hole when the fixed wedge is inserted into the fixed wedge mounting groove. When the inserted from screw mounting hole screwed to the mounting screw holes, it is preferable to provide a fixing screw for fixing the fixed wedge to the mounting cylinder. Furthermore, it is preferable that the tip of the leg plate has a locking piece that locks to an edge of the fixed wedge mounting groove.

The locking step portion includes a locking surface that is substantially perpendicular to the first direction and a locking inner peripheral surface that is substantially orthogonal to the locking surface, and the operation cap is formed on the end edge portion . It is preferable to have a first annular ridge at a position facing the locking inner peripheral surface so as to contact and deform the locking inner peripheral surface and tightly adhere the operation cap and the locking step portion. Further, the operation cap is deformed in contact with the engagement surface at a position facing the engagement surface of the end edge portion , and the operation cap and the engagement step portion are hermetically adhered to each other. It is preferable to have an annular ridge.

  The pull-out prevention member is a fixed band that is inserted into the inner peripheral surface of the mounting cylinder from the inside of the case main body and has an annular shape by overlapping both end portions of a band-shaped band main body, and the contact portion is the band main body. A male screw attached to one end of the fixed band in the circumferential direction of the fixed band, and the other end of the band main body is formed long in the direction intersecting the circumferential direction by being pitch-separated in the circumferential direction of the fixed band, A plurality of locking notches into which a part of the male screw enters and locks, and changes the circumferential length of the fixing band by rotating the male screw to change the locking position of the male screw and the locking notch It is preferable to do. Moreover, it is preferable that the inner peripheral surface of the attachment hole and the outer peripheral surface of the attachment tube have a rotation restricting portion that restricts rotation of the attachment tube.

  According to the present invention, when mounting a component, the drop-off preventing member is mounted from the second direction intersecting with the component insertion direction, so that the component is easily mounted on the case of the operation portion of the endoscope having a limited mounting space. be able to. Also, when removing a part from the case, the part can be easily removed from the case by removing the drop-off prevention member from the second direction.

It is a perspective view which shows the electronic endoscope system which has the operation part of the endoscope of this invention. It is a perspective view which shows the operation part of the endoscope of the state which removed the cover. It is a perspective view which shows the attachment bracket of a universal cord connection port. It is a perspective view which shows the procedure which attaches a pushbutton switch to the attachment hole of a case main body. It is sectional drawing which shows the attachment state of a pushbutton switch. It is a side view including the partial cross section which shows the state which inserts a fixed wedge in a mounting groove. It is a side view including the partial cross section which shows the state which inserted the fixed wedge in the attachment groove | channel. It is sectional drawing which shows the pushbutton switch of 2nd Embodiment which changed the edge part of the operation cap with respect to 1st Embodiment. It is sectional drawing which shows the pushbutton switch of 3rd Embodiment which changed the edge part of the operation cap similarly with respect to 1st Embodiment. It is a perspective view which shows another embodiment of a fixed wedge. It is a perspective view which shows another embodiment of a fixed wedge similarly. It is a perspective view which shows another embodiment of a fixed wedge similarly. It is sectional drawing which shows another embodiment using a fixed band instead of a fixed wedge as a drop-off prevention member. It is a perspective view which shows a fixed band. It is a perspective view which shows the pushbutton switch of other embodiment of this invention which has a rotation control surface. It is a top view which shows the electronic endoscope system which has the operation part of the endoscope in another embodiment which attached the pushbutton switch and the three-way switching valve to the universal cord connector.

  As shown in FIG. 1, an electronic endoscope system 8 includes an electronic endoscope 10 including an insertion unit 11 and an operation unit 12 inserted into a body cavity or the like of a subject, a universal cord 13, a light source device 14, and the like. And the processor unit 15. An imaging unit is provided inside the distal end of the insertion portion 11. An imaging signal from the imaging unit is sent to the processor device 15 via the operation unit 12, the universal cord 13, and the connector 25. In the processor device 15, known image processing is performed, and an observation image taken by the imaging unit is displayed on, for example, the television monitor 16.

  The insertion portion 11 includes a distal end hard portion 17, a bending portion 18, and a flexible portion 19 in order from the distal end. As is well known, an observation window, an illumination window, a forceps outlet, an air / water supply nozzle, a water jet nozzle, and the like are formed on the distal end surface of the distal end hard portion 17. The bending portion 18 is bent at an arbitrary angle in the vertical and horizontal directions by the rotation operation of the angle knob 20. As a result, the distal end hard portion 17 is directed in a desired direction in the body cavity, and various treatments using the forceps from the forceps outlet and imaging of a site to be observed in the body cavity become possible. The flexible portion 19 is a portion that connects the operation portion 12 and the bending portion 18 in a long shape, and has flexibility.

  The operation unit 12 is configured by attaching component members such as an angle knob 20, an air / water supply button 26, a suction button 27, and first to third push button switches 28 to 30 to the case 21. As shown in FIG. 2, the case 21 includes a case main body 23 having an opening 22 and a lid 24. The case body 23 and the lid 24 are made of a resin molded product. The case main body 23 is formed in a substantially five-drawn box shape whose upper part is slightly narrowed, and includes a bottom plate 23a (corresponding to a side surface of the operation unit 12) and a front plate disposed on the periphery so as to surround the bottom plate 23a. 23b, upper plate 23c, upper back plate 23d, lower back plate 23e, and lower plate 23f. An O-ring storage groove (not shown) is formed at the peripheral edge of the opening 22, and an O-ring (not shown) is fitted into the storage groove.

  The lid 24 is fitted to the case body 23 so as to close the opening 22. Then, it is fixed to the case body 23 using two screws 33. By this fixing, the O-ring is deformed between the case main body 23 and the lid 24, and is tightly adhered to both, thereby ensuring airtightness. By ensuring airtightness, watertightness is also ensured at the same time. The angle knob 20 (see FIG. 1) is disposed on the bottom plate 23a (side surface of the operation unit 12) side of the case body 23.

  As shown in FIGS. 1 and 2, the air / water supply button 26, the suction button 27, the first push button switch 28, and the second push button switch 29 are attached to the front plate 23 b of the case body 23, and the third push button The switch 30 is attached to the upper plate 23 c of the case body 23. The air / water supply button 26 is operated when air or liquid is selectively sent out from the distal end of the insertion portion 11. The suction button 27 is operated when suctioning air or liquid from the distal end of the insertion portion 11. The first to third push button switches 28 to 30 are operated when performing still image shooting, enlarged shooting, and other various operations.

  As shown in FIG. 2, the grip part 35 is integrally provided in the outer center part of the lid | cover 24 so that it may protrude outside. When gripping the case 21 with the left hand, the grip portion 35 is supported by the thumb of the left hand so that the case 21 can be easily gripped. A circular opening 36 is formed at the protruding end of the grip portion 35. The universal cord 13 (see FIG. 1) is inserted into the opening 36 while being kept airtight by an O-ring (not shown) or the like.

  The interior of the case body 23 is partitioned by a partition plate 31 into an operation button storage chamber and a wire operation section storage chamber related to the angle knob. The partition plate 31 is made of, for example, a metal plate, and is fixed to the case body 23 with a mounting screw (not shown).

  A bracket 37 is disposed in the center of the case body 23. As shown in FIG. 3, the bracket 37 has an arched frame 38 having a pair of leg portions 38a (see FIG. 2) and 38b, and an auxiliary leg portion 39 screwed to one leg portion 38b. The universal cord connection port 40 is held. As shown in FIG. 2, the auxiliary leg 39 is attached so as to be orthogonal to the frame 38. Then, it is fixed to the partition plate 31 with screws by three-point support of the pair of leg portions 38 a and 38 b and the auxiliary leg portion 39. Thereby, the universal cord connection port 40 is firmly fixed to the case body 23. Further, since the auxiliary leg portion 39 is fixed to the frame 38 with screws, the bracket 37 can be easily disassembled into the frame 38 and the auxiliary leg portion 39 when the operation portion 12 is repaired or maintained. The bracket 37 is barrel-polished so as not to damage each wiring cord 42.

  In the universal cord connection port 40, the air supply / water supply buttons 26, the tubes 41 of the suction buttons 27, the wiring cords 42 from the push button switches 28 to 30, and the like are collected. The universal cord 13 is branched from the universal cord connection port 40 to the outside of the case 21. Further, by removing the bracket 37 and disassembling it into the frame 38 and the leg portion 39, each wiring cord 42 can be easily exposed, and repair and maintenance are facilitated.

  As shown in FIG. 4, the first push button switch 28 includes a push button switch body 50, a fixed wedge 51, and a fixed screw 52. The push button switch body 50 is slightly smaller in diameter than the diameter of the circular mounting hole 54 formed in the front plate 23b, and is formed in a cylindrical shape as a whole.

  As shown in FIG. 5, the push button switch body 50 includes an operation cap 60, a switch body 61, and a mounting cylinder 62 in order from the tip. The mounting cylinder 62 is made of hard plastic or metal. On the outer peripheral surface of the mounting cylinder 62, an operation cap mounting flange 63 is formed on the outer side with respect to the case body 23 so as to protrude from the peripheral surface. The outer diameter of the operation cap mounting flange 63 is made larger than the inner diameter of the mounting hole 54. Further, a fixed wedge mounting groove 64 (see FIGS. 4 and 6) is formed on the outer peripheral surface located inside the case body 23 in a state where the mounting cylinder 62 is inserted into the mounting hole 54 of the case body 23. .

  A partition plate 65 for holding the switch body 61 is formed on the inner peripheral surface of the mounting cylinder 62, and a through hole 66 is formed in the partition plate 65. The switch body 61 has a substrate 61a, and the switch body 61 is fixed to the partition plate 65 through the substrate 61a. On the back side of the substrate 61 a, terminals 67 are formed so as to protrude, and these are inserted into the through holes 66 of the partition plate 65. The wiring cord 42 of the universal cord 13 is connected to the terminal 67 by soldering or the like.

  As shown in FIG. 6, the fixed wedge attachment groove 64 has a pair of parallel groove surfaces 64 a in which a part of the peripheral surface of the attachment cylinder 62 is cut out in a direction perpendicular to the cylinder center. One side wall (located outside) 64b of the groove surface 64a is orthogonal to the cylinder core, and the other side wall (located inside) 64c intersects the cylinder center. An inclined surface 68 is formed by the intersecting side walls 64c.

  As shown in FIG. 5, the operation cap 60 is made of synthetic rubber and has flexibility, and the outer shape is formed in a hemisphere. At the center of the inner peripheral surface 60a, a pressing protrusion 60b is formed at a position facing the movable portion 61b of the switch body 61. When the operation cap 60 is pressed, the operation cap 60 is deformed, and the movable portion 61b of the switch body 61 is pressed by the pressing protrusion 60b. As a result, the switch body 61 is switched ON or OFF.

  An attachment groove 70 is formed in the circumferential direction near the edge on the inner peripheral surface 60a of the operation cap 60. The operation cap mounting flange 63 is fitted into the mounting groove 70. In addition, a locking step portion 71 is formed on the outer side of the mounting hole 54 formed in the front plate 23b. The locking step portion 71 includes a locking surface 71a perpendicular to the first direction A1 and a locking inner peripheral surface 71b that is continuous and orthogonal to the locking surface 71a. This locking step portion 71 becomes a cap mounting groove, and the end edge portion 60c of the operation cap 60 is fitted therein.

  As shown in FIG. 4, the fixed wedge 51 is formed by bending a U-shape by a pair of leg portions 51a and a connecting portion 51b, and is made of hard plastic or metal. A hole 51c through which the fixing screw 52 is inserted is formed at the center of the connecting portion 51b. One side edge of the leg portion 51 a is formed obliquely to form an inclined surface 53. The inclined surface 53 constitutes a close contact portion for bringing the push button switch main body 50 as a component member into close contact with the front plate 23 b of the case main body 23.

  As shown in FIG. 6, the fixed wedge mounting groove 64 is formed in a trapezoidal shape when viewed from the front, and has an inclined surface 68 that gradually expands toward the upper side. The fixed wedge 51 passes through the opening 22 of the case main body 23 and is inserted into the fixed wedge mounting groove 64 from the second direction A2 substantially orthogonal to the first direction A1. As shown in FIG. 5, the inclined surface 53 of the fixed wedge 51 is pressure-bonded to the inclined surface 68 by inserting the fixed wedge 51 into the mounting groove 64. By this crimping, the mounting cylinder 62 moves to the right in the mounting hole 54, and the edge 60 c of the operation cap 60 is crushed and deformed between the operation cap mounting flange 63 and the locking step 71. Then, the operation cap 60 is pressure-bonded in the locking step portion 71. By pressing the operation cap 60, the push button switch body 50 is airtightly attached to the front plate 23b. Reference numeral 75 denotes a washer. The washer 75 protects the inner surface of the front plate 23b from being damaged when the fixed wedge 51 is made of metal.

  As shown in FIG. 5, a screw hole 76 is formed in the mounting cylinder 62 corresponding to the hole 51c in a state where the fixed wedge 51 is inserted in the wedge mounting groove 64. The fixing screw 52 is screwed into the screw hole 76. The fixed screw 52 prevents the fixed wedge 51 from dropping from the wedge mounting groove 64. In addition, as the fixing screw 52 enters the screw hole 76, the end edge portion 60c of the operation cap 60 is strongly crimped to the locking step portion 71, and the push button switch body 50 is more firmly attached to the attachment hole 54. It is done. Further, by adjusting the screwing amount of the fixing screw 52, the crimping force by the wedge 51 can be adjusted, and airtightness and watertightness can be reliably ensured.

  As shown in FIG. 4, the second and third push button switches 29 and 30 are also the first push button switches except that the operation caps 29a and 30a are not hemispherical but cylindrical or frustoconical. Since the configuration is the same as that of the first push button switch 28, the same reference numerals are used, and redundant description is omitted. In addition, the influence of the expansion | swelling of the air by a temperature change can be decreased by making the internal space of an operation cap small.

  Each push button switch 28-30 is attached to the case main body 23 as follows. First, as shown in FIG. 6, the washer 75 is previously aligned with the attachment hole 54 on the inner surface of the case body 23 and bonded. Next, the wiring cord 42 is pulled out from each mounting hole 54, and the wiring cord 42 is soldered and connected to the terminal 67 of the switch body 61. Instead of soldering, a connection terminal may be used for the wiring cord that has been soldered in advance, and the wiring cord 42 of the universal cord may be connected.

  Next, as shown in FIG. 4, the push button switch body 50 is inserted into each mounting hole 54 from the first direction A1. Next, as shown in FIG. 6, the fixed wedge 51 is inserted from the second direction A2 that is substantially orthogonal to the first direction A1. By this insertion, the inclined surface 68 of the fixed wedge mounting groove 64 and the inclined surface 53 of the fixed wedge 51 come into contact with each other, and the mounting cylinder 62 moves to the inside of the case body 23.

  Next, when the fixed screw 52 is inserted into the mounting hole 51 c of the fixed wedge 51 and rotated, the fixed screw 52 is screwed into the screw hole 76 and the fixed wedge 51 is fastened to the mounting groove 64. By this tightening, the end edge portion 60 c of the operation cap 60 comes into close contact with the locking step portion 71. Thereby, the push button switch 28 is fixed to the case main body 23, and water and air from the mounting hole 54 are prevented from entering the case main body 23 due to the close contact between the operation cap 60 and the locking step portion 71. The Further, as compared with the conventional type in which the push button switch is tightened from the inside of the case with a nut or a screw, it is not necessary to connect a special recess or the like for inserting the nut or the screw to the opening 22. Therefore, the opening 22 and the lid 24 do not have a complicated shape that is three-dimensionally curved, and manufacturing is facilitated. Moreover, it is only necessary to insert the fixed wedge 51 and fasten the fixed screw 52 from the second direction, and the attachment can be performed easily. Further, since the fixed wedge 51 is inserted from the second direction A2 orthogonal to the first direction A1, which is the insertion direction of the push button switch body 50, the insertion becomes easy.

  In the present embodiment, the fixed wedge 51 is inserted from the second direction A2 orthogonal to the first direction A1, which is the insertion direction of the push button switch body 50. However, the mounting surface of the case body 23 is inclined or In the case of a curved surface, the crossing angle between the first direction and the second direction is appropriately changed according to these mounting surfaces to be a crossing angle other than 90 °.

  When the push button switches 28 to 30 are removed from the case main body 23 for maintenance or inspection, the operation is reversed. First, after the fixing screw 52 is removed by inserting a driver from the second direction A2, the fixing wedge 51 can be easily pulled out. Moreover, it is not necessary to rotate nuts and screws from the inside of the case body 23 as compared with the conventional type, and can be easily removed.

  Next, a second embodiment of the present invention will be described with reference to FIG. In the second embodiment, the first annular protrusion 82 is disposed on the outer peripheral surface of the end edge portion 81 of the operation cap 80 at a position facing the locking inner peripheral surface 71 b of the locking step portion 71. A second annular protrusion 83 (two-dot chain line display portion) is formed at a position facing the locking surface 71a. Since the other configuration is the same as that of the first embodiment, the other components are denoted by the same reference numerals, and redundant description is omitted. Similarly, in the following other embodiments, the same components are denoted by the same reference numerals.

  The first annular protrusion 82 is deformed in contact with the locking inner peripheral surface 71b, and the operation cap 80 and the locking step portion 71 are brought into tight contact with each other. Further, the second annular ridge 83 is deformed by coming into contact with the locking surface 71a of the locking step portion 71, and the operation cap 80 and the locking step portion 71 are brought into tight contact with each other. As described above, the first and second annular protrusions 82 and 83 are provided as compared with the first embodiment, and these are brought into contact with the locking step portion 71 to be deformed, so that the operation cap 80 is attached. Since double contact is made with the hole 54, the airtightness is further improved. Note that only one of the first annular protrusion 82 and the second annular protrusion 83 may be formed, and in this case, the airtightness between the operation cap 80 and the mounting hole 54 is ensured.

  In the second embodiment, the first sealant 84 is placed between the operation cap 80 and the attachment hole 54, and the second sealant 85 is placed between the operation cap 80 and the attachment tube 62. A third sealing agent 86 is placed in the mounting cylinder 62 on the opposite side of the partition plate 65 to which the switch body 61 is mounted. The first sealant 84 securely fixes the operation cap 80 to the locking step portion 71 and prevents dust, foreign matter, germs, and the like from accumulating in the gap between the operation cap 80 and the locking step portion 71. Further, the second sealant 85 seals the gap between the mounting cylinder 62 and the operation cap 80, and prevents air and the like from entering, and also ensures airtightness. The third sealing agent 86 seals the connection portion between the terminal 67 and the wiring cord 42 of the switch body 61 and also ensures the airtightness inside the case body 23 when the operation cap 80 is damaged. About another structure, it is the same as 1st Embodiment, and the overlapping description is abbreviate | omitted.

  As shown in FIG. 9, in the third embodiment, the cap mounting flange 87a of the mounting cylinder 87 is directly brought into contact with the locking surface 71a of the locking step portion 71 of the mounting hole 54. The configuration is the same as that of the second embodiment except that the shape of the end edge portion 88 is different from that of the second embodiment. In the present embodiment, the first annular protrusion 89 ensures adhesion with the locking step 71. Further, the first sealant 84 seals between the attachment hole 54 and the operation cap 88.

  In the first to third embodiments, the example using the fixed wedge 51 having the inclined surface 53 has been described. However, in each embodiment shown in FIGS. 10 to 12, the inclined surface of the mounting groove 64 of the push button switch body 50. 68, fixed wedges 90 to 92 having curved projections 90a and 91a for abutting 68 and urging the push button switch body 50 inward are used.

  As shown in FIG. 10, the fixed wedge 90 is formed by bending a metal plate, for example, and has a rectangular connecting plate 90b and first and second leg portions 90c and 90d connected to the four corners of the connecting plate 90b. And have. The first leg portion 90c is an elongated band plate and is bent at 90 ° with respect to the connecting plate 90b. The second leg portion 90d is a band plate having a curved projection 90a protruding outward at the intermediate portion, and has an acute angle with respect to the connecting plate 90b so that the tip is close to the tip of the first leg 90c. Can be folded. When the fixed wedge 90 is inserted into the mounting groove 64 of the push button switch body 50 instead of the fixed wedge 51 shown in FIG. 6, the first leg 90c comes into contact with the washer 44, and the curved protrusion of the second leg 90d. 90 a presses the inclined surface 68. As a result, the push button switch body 50 moves in a direction toward the inside of the case body 23. Further, since the second leg portion 90d urges the fixed wedge 90 toward the inclined surface 68 by the curved projection 90a having a spring property, the push button switch body 50 is attached to the inside of the case body 23 with an appropriate force. You can Furthermore, the urging force can be easily adjusted by changing the screwing amount of the fixing screw 52.

  FIG. 11 shows a structure in which a single band is bent by sheet metal processing, and leg portions 91b having curved projections 91a are formed on both sides of the connecting plate 91c to form a fixed wedge 91. The fixed wedge 90 shown in FIG. Similarly, the inclined surface 68 of the mounting groove 64 can be pressed by the curved protrusion 91a formed at the center of the leg portion 91b. The fixed wedge 91 is configured as follows. First, a pair of legs 91b are formed by bending at a right angle from both ends of a metal strip to the central connecting plate 91c. Next, after twisting the leg portion 91b by 90 °, the curved projection 91a is pressed at the substantially central portion of the leg portion 91b. Note that the order of processing is not limited to this, and the curved protrusion 91a may be formed first and then twisted and bent.

  FIG. 12 shows a fixed wedge 92 in which a locking claw (locking piece) 91d for retaining is bent at the tip of the fixed wedge 91 of FIG. When the fixed wedge 92 of this embodiment is inserted into the mounting groove 64 of the push button switch body 50 instead of the fixed wedge 51 shown in FIG. 6, the fixed wedge 92 contacts the washer 75, and the curved protrusion 91 a has the inclined surface 68. Press. Thereby, the mounting cylinder 62 is urged toward the inside of the case main body 23. Then, the locking claw 91d is locked to the end edge of the mounting groove 64, so that a retaining effect is obtained. When the fixed wedge 92 is taken out, the curved projection 91a is pressed in the direction in which the locking claw 91d is unlocked. Accordingly, the locking claw 91d can be released from the mounting groove 64, and the fixed wedge 92 can be removed from the mounting groove 64. The fastening and fixing with the fixing screw 52 may be omitted, but the fixing screw 52 and the locking claw 91d may be used in combination. Further, instead of the fixing screw 52 and the locking claw 91d, the fixing wedge 92 may be fixed to the wedge mounting groove 64 by other fixing means.

  The fixed wedges 90 to 92 shown in FIGS. 10 to 12 are formed by pressing a metal band plate, but in addition to those formed by sheet metal processing such as pressing, the fixed wedges 90 to 92 are formed by a molded product using a hard resin. May be.

  13 and 14 show another embodiment in which a fixed wedge is not used as the removal preventing member. In addition, it is the same structure as the thing of 1st Embodiment shown in FIGS. 5-7 except using the fixed band 93 as a removal prevention member, and the same code | symbol as 1st Embodiment is attached | subjected to the same structural member. . A fixed band 93 whose outer peripheral length can be changed is inserted into the inner peripheral surface of the mounting cylinder 62. The fixed band 93 is inserted into the case main body 23 from the second direction A2 that is substantially orthogonal to the first direction A1 that is the insertion direction of the push button switch main body 50, and is then inserted into the inner peripheral surface of the mounting cylinder 62. The

  As shown in FIG. 14, the fixed band 93 has the same configuration as a known hose clamp, and is configured so that both end portions 94 a and 94 b of the band-shaped band main body 94 are overlapped to form an annular shape. A male screw 96 is rotatably held at one end 94 a of the band main body 94 by a bracket 95 in the circumferential direction of the fixed band 93. A plurality of locking notches 97 are formed in the other end portion 94 b of the band body 94 at the same pitch as the male screw 96 in the circumferential direction of the fixed band 93. The locking notch 97 is formed long in a direction intersecting the circumferential direction of the fixed band 93, and a part of the male screw 96 is inserted and locked. The male screw 96, the bracket 95, and the locking notch 97 constitute a close contact portion 98 that brings the outer peripheral surface of the mounting cylinder 62 into close contact with the inner peripheral surface of the mounting hole 54 of the case body 23.

  When attaching the push button switch 99 to the case body 23, first, the male screw 96 is rotated from the opening 22 of the case body 23 by a driver. As a result, the locking position between the male screw 96 and the locking notch 97 changes, and the circumferential length of the fixing band 93 changes. By rotating the male screw 96 in the direction in which the circumferential length of the fixed band 93 is increased in the mounting cylinder 62, the outer diameter of the fixing band 93 is increased and the mounting cylinder 62 can be pressed against the mounting hole 54. By this pressing, the push button switch 99 is fixed to the case main body 23. As shown by a two-dot chain line, a tapered surface 54a that gradually expands toward the inside of the case main body 23 is formed in the mounting hole 54, and the outer peripheral surface of the mounting cylinder 62 is crimped to the tapered surface 54a. The mounting cylinder 62 is securely fixed to the case main body 23.

  In another embodiment shown in FIG. 15, the rotation restricting surfaces 100a and 101a are formed in the mounting hole 100 and the mounting cylinder 101, and the others are configured in the same manner as in the first embodiment. The rotation restricting surface 101a of the mounting cylinder 101 is formed by cutting out a part of the outer peripheral surface of the mounting cylinder 101 into a flat shape. Similarly, a rotation regulating surface 101a that regulates the rotation of the mounting cylinder 101 in contact with the rotation regulating surface 101a is formed in the mounting hole 100 where the rotation regulating surface 101a is located. As shown in FIG. 15, a plurality of rotation restricting surfaces 101a may be provided in addition to one. Further, in the case of a plurality of sides, each side where the attachment hole 100 is formed in a polygonal shape may be used as the rotation restricting surface. Moreover, it may replace with a regulation surface, and what is necessary is just what can regulate rotation of an attachment cylinder, and you may regulate rotation using a latching protrusion and a latching recessed part. The rotation restricting surfaces 100a and 101a may be formed in the above embodiments.

  In the present embodiment, when the mounting cylinder 101 is inserted into the mounting hole 100, the mounting cylinder 101 does not rotate, and positioning when the fixed wedge 51 is inserted becomes easy. Further, since the mounting cylinder 101 does not rotate in the mounting hole 100, the wiring cord 42 is not pulled due to the rotation, and the connection portion is not separated from the soldered portion.

  In the above embodiment, the operation unit 12 of the endoscope 10 to which the insertion unit 11 is connected has been described as an example. However, any device that functions as the operation unit 12 of the endoscope 10 may be used, and the insertion unit 11 is connected. The operation unit 12 is not limited to this.

  In another embodiment shown in FIG. 16, the present invention is applied to the connector 110 of the universal cord 13 in place of the first operation unit 12 continuing to the insertion unit 11. The connector 110 has a case main body 108 and a lid 109, and connects the electronic endoscope 10 to the light source device 14 by the universal cord 13. Push-button switches 111 and 112 and a three-way switching valve 113 are attached to the case main body 108 by a fixed wedge 51 and a fixed screw 52 to constitute a second operation unit 114. An opening 115 is formed in the case main body 108, and a fixed wedge 51 and a fixing screw 52 are inserted from the opening 115.

  A specific method of attaching the push button switches 111 and 112 and the three-way switching valve 113 to the case main body 108 is the same as that in each of the above embodiments, and the same constituent members are denoted by the same reference numerals. In addition to the universal cord 13, the connector 110 is connected to a connection cord 116 to the processor device 15, a tube 118 to the liquid feeding tank 117, and the like.

  Also in the present embodiment, since the drop prevention member such as the fixed wedge 51 is inserted from the direction intersecting the insertion direction of the operation member such as the push button switches 111 and 112 and the operation member is attached to the case main body 108, these operations are performed. The attachment and removal of members can be performed easily. In the present embodiment, operation members such as push button switches 111 and 112 are attached to the case main body 108 of the connector 110 of the universal cord 13 to form the second operation unit 114, but the illustration is omitted. The operation unit can also be carried out using a case body such as a branching unit. In addition, the operation member is not limited to an operation switch or the like, and includes a three-way switching valve as described above and other mechanical operation members.

  In each of the above-described embodiments, a fixed wedge having a leg portion in a wedge shape or a curved protrusion provided in an intermediate portion of the leg portion is used as a drop-off preventing member. However, the present invention is not limited to this, and the operation member As long as the push button switch can be fixed in a watertight or airtight manner to the case by engaging with a component such as the above, the drop prevention member may have any configuration.

  In the above embodiment, an example of a push button switch is given as a component. However, the present invention is not limited to this, and may be a display component such as an LED. The operation cap is made of flexible synthetic rubber or the like. For example, the operation cap does not need to be flexible. In this case, a displaceable cap having a movable part at the top can be used. . An O-ring or the like may be used between the push button switch and the mounting hole.

  In the above embodiment, the operation unit is formed in a box shape, but the operation unit can be formed in various shapes. For example, it may be a case body formed of a cylindrical shape, a hemispherical shape, or other free curved surface.

  In the above embodiment, for example, the operation member is attached to the first direction A1 indicating the insertion direction of the operation member such as a switch into the case body and the second direction A2 indicating the insertion direction of the fixed wedge for fixing the operation member. The case where the angle of intersection between the front plate and the lid is 90 degrees has been described as an example. However, when the operation member is attached to be inclined with respect to the mounting plate portion in which the mounting hole is formed, 90 degrees. Other inclination angles may be used. In addition, the first direction A1 and the second direction A2 do not need to cross each other, and include a separated state.

In the above embodiment, screwing with the fixing screw 52 is employed as a measure for preventing the fixing wedge 51 from loosening. However, the present invention is not limited to this, and for example, fixing to the inner wall surface of the lid 24 that closes the case body 23. A convex portion or the like that restricts movement of the wedge 51 in the take-out direction may be provided. Further, the fixed wedge 51 and the mounting groove 64 may be bonded using an adhesive instead of the fixed screw 52, and in this case also, the loosening of the fixed wedge is prevented. When removing the fixed wedge 51, a removal tool such as a flat-blade screwdriver is inserted into the gap between the connecting portion 51b of the fixed wedge 51 and the mounting cylinder 62 and rotated or inclined to slightly lift the fixed wedge 51 upward. Thus, the adhesive is peeled off, and the fixed wedge 51 can be lifted from the mounting groove 64.

DESCRIPTION OF SYMBOLS 10 Electronic endoscope 12 Operation part 23 Case main body 28, 29, 30 Pushbutton switch 50 Pushbutton switch main body 51 Fixed wedge 52 Fixed screw 53,68 Inclined surface 54 Mounting hole 60 Operation cap 61 Switch main body 62 Mounting cylinder 63 Operation cap Mounting flange 64 Mounting groove 68 Inclined surface 70 Mounting groove 71 Locking step portion 80 Operation cap 90, 91, 92 Fixed wedge 93 Fixed band 99 Push button switch 110 Connector 111, 112 Push button switch 113 Three-way switching valve

Claims (13)

A case body having an opening and a mounting hole;
A lid attached airtight so as to close the opening of the case body;
An operation member inserted from the first direction toward the inside from the outside of the case body with respect to the mounting hole,
Wherein the first second direction crossing to the direction is inserted through the opening of the case body, engaged with the operating member protruding to the inside of the case body, pulled out from the case body of the operating member A removal prevention member for preventing
A contact portion provided on the pull-out prevention member, and tightly contacting the operation member to the case body;
A locking step portion formed in the mounting hole and locked by the operation member when the operation member is inserted from the first direction.
With
The operating member is
A mounting cylinder inserted into the mounting hole from the first direction;
An operation portion of an endoscope having an operation cap attached to one end of the attachment tube and deformed by a pressing operation . The operation member has an operation member main body, the attachment cylinder holds the operation member main body, and the operation cap is attached to one end of the attachment cylinder so as to cover the operation member main body. The operation part of the endoscope according to Item 1. The operation portion of the endoscope according to claim 1 , wherein the operation cap has an end edge portion to be engaged with the engagement step portion on an outer periphery. The removal preventing member is a fixed wedge;
The mounting cylinder has a fixed wedge mounting groove that is biased inward in the first direction by the insertion of the fixed wedge and that locks the locking portion of the operation cap in the locking step portion. The operation part of the endoscope according to any one of claims 1 to 3 . The fixed wedge fitting groove has an inclined surface, urges the mounting cylinder by the inclined face by insertion from the second direction of the fixed wedge inwardly in the first direction, said edge portion 5. The operation portion of the endoscope according to claim 4 , wherein the operation cap and the mounting hole are brought into tight contact with each other by being deformed in the locking step portion. The fixed wedge is a U-shaped plate member having tapered leg plates at both ends of the connecting plate, and one side edge of the leg plate is formed obliquely, and the inclined surface is pressed by the pair of oblique side edges. The operation part of the endoscope according to claim 5 . 6. The endoscope according to claim 5 , wherein the fixed wedge is a U-shaped plate member in which leg plates having a curved projection in the middle are formed at both ends of the connecting plate, and the inclined surface is pressed by the curved projection. Operation part. A screw mounting hole formed in the connecting plate;
A mounting screw hole formed in the mounting cylinder at a position corresponding to the screw mounting hole when the fixed wedge is inserted into the fixed wedge mounting groove;
The operation portion of the endoscope according to claim 6 , further comprising a fixing screw that is inserted from the screw mounting hole and is screwed into the mounting screw hole to fix the fixed wedge to the mounting cylinder. . The operation portion of the endoscope according to claim 7 , wherein a distal end of the leg plate includes a locking piece that is locked to an edge of the fixed wedge mounting groove. The locking step portion includes a locking surface substantially perpendicular to the first direction and a locking inner peripheral surface that is substantially orthogonal to the locking surface and is continuous.
The operation cap is deformed in contact with the locking inner peripheral surface at a position facing the locking inner peripheral surface of the end edge portion , and the operation cap and the locking step portion are hermetically adhered. The endoscope operating portion according to any one of claims 3 to 9, further comprising one annular protrusion. The operation cap is deformed in contact with the engagement surface at a position facing the engagement surface of the end edge portion , and the operation cap and the engagement step portion are hermetically adhered to each other. The operation portion of the endoscope according to claim 10 , further comprising a strip. The pull-out prevention member is a fixed band that is inserted into the inner peripheral surface of the mounting cylinder from the inside of the case main body, and has an annular shape by overlapping both end portions of a band-shaped band main body,
The contact portion is
A male screw attached to one end of the band body in the circumferential direction of the fixed band;
A plurality of latches formed at the other end of the band main body in the circumferential direction of the fixed band and spaced apart by the pitch of the male screw and extending in a direction crossing the circumferential direction, and a part of the male screw enters and latches Having a notch,
The endoscope according to any one of claims 1 to 3, wherein the external length of the fixing band is changed by rotating the male screw to change a locking position between the male screw and the locking notch. Operation part. The operation of the endoscope according to any one of claims 1 to 12 , wherein an inner peripheral surface of the mounting hole and an outer peripheral surface of the mounting tube have a rotation restricting portion that restricts rotation of the mounting tube. Department.

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