JP3173637B2 - Endoscope suction channel switching device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a suction channel switching device for an endoscope, and more particularly, to a suction channel switching device for an endoscope provided with two forceps ports in a hand operation section.

[0002]

2. Description of the Related Art In this type of endoscope, two forceps channels are also used as a suction conduit. For example, one forceps channel is connected to a suction device, and the other forceps channel is connected to a switching valve. And communicate with one forceps channel through the other. Thereby, when the switching valve is opened and the suction device is driven, suction can be performed simultaneously with the two forceps channels, and when the switching valve is closed,
Suction can be performed with only one forceps channel.

In the endoscope disclosed in Japanese Patent Application Laid-Open No. 2-126826, a switching valve is screwed and fixed to a hand-held operation section of the endoscope with a screw.

[0004]

However, in the endoscope described in Japanese Patent Application Laid-Open No. 2-126826, since the switching valve is screwed and fixed with screws, the mounting operation is troublesome.
In addition, there is a disadvantage that the switching valve cannot be easily removed from the operation unit at the endoscope when the switching valve is washed.

The present invention has been made in view of such circumstances, and an object of the present invention is to provide a suction channel switching device for an endoscope in which a switching valve can be easily attached and detached.

[0006]

According to the present invention, in order to achieve the above object, a switching valve for communicating at least one of two channels inserted through an endoscope insertion portion with suction means is provided. In the suction channel switching device for an endoscope provided in the mirror operation section, the switching valve is detachably attached to the endoscope operation section via a bayonet mount.

According to the present invention, in order to achieve the above object, a switching valve for communicating at least one of two channels inserted through an endoscope insertion portion with a suction means is provided in an endoscope hand-held operation portion. In the suction channel switching device for an endoscope, the switching valve is attached to the body mount portion at a first position of a body mount portion formed at a switching valve mounting position on the endoscope hand operation unit side. A detachable valve mount portion, a valve body rotatably supported by the valve mount portion, and communicating at least one of the two channels to suction means in conjunction with a rotation operation; and the body mount portion. Alternatively, the valve mount section is provided at the valve mount section, and holds the valve mount section at a second position where the valve mount section is rotated by a predetermined amount from the first position of the body mount section. Comprising a holding means, wherein the valve
The main body is turned to the valve mount section via rotation control means.
The rotation range is movably supported and regulated by the rotation regulating means.
The pivot position at one end of the enclosure is the open position of the valve body.
At the same time, the rotation position on the other end is the closed position of the valve body.
Characterized in that that.

According to the present invention, in order to achieve the above object, a switching valve for connecting at least one of two channels inserted through an endoscope insertion portion to a suction means is provided in an endoscope hand operation portion. In the suction channel switching device for an endoscope, the switching valve is attached to the body mount portion at a first position of a body mount portion formed at a switching valve mounting position on the endoscope hand operation unit side. A detachable valve mount portion, a valve body rotatably supported by the valve mount portion, and communicating at least one of the two channels to suction means in conjunction with a rotation operation; and the body mount portion. Alternatively, the valve mount portion is provided on the valve mount portion, and the valve mount portion is rotated by a predetermined amount from the first position of the body mount portion. A locking means for fixing to the unt part, and a locking means provided between the valve mount part and the valve body for urging the locking means in a fixing direction between the valve mount part and the body mount part, and pressing the valve mount part. Unlocking means for releasing the fixing of the valve mount portion and the body mount portion by the locking means by operation , wherein the valve body is
And is rotatably supported by the valve mount portion.
The rotation position at one end of the rotation range regulated by the regulation means is
The valve body is in the open position and the other end is in the rotational position.
Is a closed position of the valve body .

[0009]

According to the first aspect of the present invention, when the switching valve is mounted on the endoscope hand operation unit, first, the valve mount portion of the switching valve is connected to the first end of the body mount unit on the endoscope hand operation unit side. And the valve mount is mounted on the body mount. Next, the valve mount is rotated by a predetermined amount from the first position of the body mount, and the valve mount is held at the second position by the holding means. When the valve body is rotated in this state, at least one of the two channels can be communicated with the suction means. Next, when the switching valve is to be removed from the endoscope hand operation unit, the switching valve can be removed by rotating the valve mount from the second position to the first position.

According to the second aspect of the present invention, when the switching valve is mounted on the endoscope hand operation unit, first, the valve mount portion of the switching valve is connected to the first end of the body mount unit on the endoscope hand operation unit side. And the valve mount is mounted on the body mount. Next, the valve mount is rotated by a predetermined amount from the first position of the body mount, and the valve mount is locked at the second position by the fixing means. When the valve body is rotated in this state, at least one of the two channels can be communicated with the suction means. Next, when the switching valve is to be removed from the endoscope hand operation section, the valve mount section is pressed and the fixing between the valve mount section and the body mount section by the locking means is released by the unlocking means. When the part is rotated from the second position to the first position, the switching valve can be removed.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A preferred embodiment of the suction channel switching device for an endoscope according to the present invention will be described below in detail with reference to the accompanying drawings.
FIG. 1 is an external view showing a hand operation unit of an endoscope to which the suction channel switching device for an endoscope according to the present invention is applied. As shown in the drawing, an insertion portion 12 is connected to a lower end portion of the hand operation portion 10, and a bending portion and a tip configuration portion (not shown) are connected to a tip end of the insertion portion 12. An eyepiece 16 is formed at the upper end of the hand operation unit 10, and a lever 18 for bending the bending portion and a suction operation button 2 are provided near the eyepiece 16.
0 and air / water operation buttons 22 are provided side by side. One end of a connection tube 24 is connected to a side portion of the hand operation unit 10, and a suction tube, a light guide cable, and the like (not shown) are arranged in the tube 24. One end of the suction tube has the suction operation button 2
The other end is connected to a suction device (not shown).

On the other hand, a projecting portion 26 inclined forward is formed at a lower portion of the hand operating portion 10, and two forceps ports 28, 30 are juxtaposed at an upper end portion of the projecting portion 26. The forceps port 28
Is formed with a larger diameter than the forceps port 30 so that two types of treatment tools having different sizes can be inserted from the two forceps ports 28 and 30. A switching valve 32 is rotatably attached to the side of the protrusion 26. The structure of the switching valve 32 and the structure for attaching and detaching it to and from the protrusion 26 will be described later.

FIG. 2 is a longitudinal sectional view of a main part of the hand operation unit 10 along the axis of the forceps port 28, and FIG.
FIG. 4 is a longitudinal sectional view of a main part of the hand operation unit 10 along the axis 0;
Is a cross-sectional view of the protrusion 26 along the axis of the forceps ports 28 and 30. As shown in FIGS. 2 and 4, the base 34 in which the forceps port 28 is formed is fixed to an upper part of an insertion passage 36 formed in the protrusion 26. A substantially cylindrical pipe fitting 38 is connected to a lower portion of the base 34, and the pipe fitting 38 is connected to the cylindrical body 40 and the connector 4.
2 and connected to the forceps channel 44.

The conduit 46 of the connecting tool 42 is bent in an L-shape so as to guide the treatment tool inserted from the forceps port 28 toward the insertion portion. The thick part 42 </ b> A of the connection tool 42 is fixed to the frame 48 of the hand operation unit 10 by screws 50. Further, the connecting tool 42 has a communication port 42B formed on the upper part and a communication port 42C formed on the lower part. The communication port 42B is connected to the cylinder 40 via an O-ring 52, and the communication port 42C is Base end 4
4A is connected via a connecting jig 54. The distal end of the forceps channel 44 is connected to a forceps window formed in the distal end component of the insertion section. Thus, the treatment tool inserted via the connection tool 42 is guided to the forceps window by the forceps channel 44.

As shown in FIG. 4, the plumbing tool 38 is disposed coaxially with the base 34 in the insertion passage 36 of the projection 26,
The O-rings 56 and 58 maintain the airtightness of the insertion passage 36. A communication passage 60 penetrating through the side surface of the pipe fitting 38 is formed. The communication passage 60 communicates with a mounting hole 62 of the switching valve 32 formed in the protrusion 26. Further, a flat positioning surface 64 is formed on a part of the outer peripheral surface of the plumbing tool 38 as shown in FIG. The positioning surface 64 is formed along the longitudinal direction of the plumbing tool 38 and fits with a positioning surface 66 formed in the longitudinal direction of the insertion passage 36 of the projection 26. Therefore, the plunger 38 is inserted into the insertion passage 36 by inserting the positioning surface 64 along the positioning surface 66, and the lower step 39 of the plunger 38 contacts the step 37 of the insertion passage 36. At the point of contact, the communication passage 60 of the piping tool 38 and the mounting hole 62 of the switching valve 32 are positioned.

On the other hand, as shown in FIGS.
Is fixed to the upper part of the other insertion passage 70 formed in the protrusion 26. A substantially cylindrical pipe 72 is connected to a lower portion of the base 68, and the pipe 72 is connected to a forceps channel 78 via a cylindrical body 74 and a connector 76. The main conduit 80 of the connection tool 76 is bent in a U-shape so as to guide the treatment tool inserted from the forceps port 30 toward the insertion portion. The connection tool 76 has a communication port 76A formed at an upper portion, and a bifurcated lower portion formed with communication ports 76B and 76C at the front and rear. The communication port 76A
Is connected to the cylinder 74 via an O-ring 82, the communication port 76B is connected to the distal end 84A of the suction tube 84, and the communication port 76C is connected to the proximal end 7 of the forceps channel 78.
8A is connected via a connecting jig 86. The distal end of the forceps channel 78 is connected to a forceps window formed in the distal end component of the insertion section. Thus, the treatment tool inserted via the connection tool 76 is guided by the forceps channel 78 to the forceps window.

The suction tube 84 is connected at its base end to a valve of the suction operation button 20 shown in FIG. 1, and is opened to communicate with the suction device via the above-mentioned suction tube. You. Therefore, if the suction device is operated by operating the valve, the liquid accumulated in the affected part or the like can be sucked from the forceps window through the forceps channel 78, the connector 76, and the suction tube 84. Also,
By opening the switching valve 32 to allow the piping tool 38 on the forceps port 28 side to communicate with the piping tool 72 on the forceps port 30 side,
Suction can be performed by the two forceps channels 44 and 78.

As shown in FIG. 4, the pipe fitting 72 is disposed coaxially with the base 68 in the insertion passage 70 of the projecting portion 26.
The O-rings 88 and 90 maintain the airtightness of the insertion passage 70. A communication passage 92 is formed on the side surface of the pipe 72 and penetrates the switching valve 32.
Is connected to the mounting hole 62. Further, a flat positioning surface 94 is formed on a part of the outer peripheral surface of the plumbing tool 72 as shown in FIG. The positioning surface 94 is provided for the pipe fitting 7.
2 and is formed along the longitudinal direction of
0 is fitted to the positioning surface 96 formed in the longitudinal direction.
Therefore, the piping tool 72 moves the positioning surface 94 to the positioning surface 9.
6 is inserted into the insertion passage 70 by being inserted along, and when the lower step 73 of the pipe 72 abuts against the step 71 of the insertion passage 70, the communication passage 92 of the pipe 72 is
And the mounting hole 62 of the switching valve 32 are positioned. Thus, when the switching knob 98 of the switching valve 32 is opened, the communication path 60 of the pipe tool 38 and the communication path 92 of the pipe tool 72 are connected via the communication path 102 of the valve body 100.

As shown in FIGS. 5 and 6, the switching valve 32 is provided with a switching knob 98 exposed to the outside from the protruding portion 26, and a valve having a substantially cylindrical shape is provided below the switching knob 98. The main body 100 is fixed by bolts 104. At a substantially central portion of the valve body 100, a concave groove 106 is formed along an outer peripheral surface,
An O-ring 108 for sealing is mounted in the groove 106. When the switching valve 32 is attached to the protruding portion 26, the O-ring 108 presses against the inner peripheral surface of the body mount portion 110 disposed on the protruding portion 26 side, thereby improving the airtightness between the valve body 100 and the body mount portion 110. To keep. The body mount 110 is a claw that forms a bayonet mount, the details of which will be described later.

Below the switching knob 98, there is disposed a valve mount portion 112 formed in a substantially donut shape. The valve mount portion 112 is rotatable on an upper cylindrical portion 114 of the valve main body 100 and an inner peripheral portion 116 thereof is rotatable. Has been inserted. Thus, the valve body 100 and the valve mount 112 are relatively rotatable. A click ball 116 constituting one click mechanism is attached to the lower surface of the switching knob 98.
16 is urged in the direction of the valve mount 112 by the urging force of a spring (not shown) embedded in the switching knob 98. On the upper surface of the valve mount 112 corresponding to the click ball 116, two click holes 118 and 120 constituting the other click mechanism are formed at predetermined intervals. Further, on the lower surface of the switching knob 98, a guide pin 122 is implanted at a position symmetrical to the click ball 116.
12 is engaged with an arc-shaped long hole 124 formed on the upper surface. The elongated hole 124 is formed to be slightly wider than the interval between the click holes 118 and 120. Therefore, the amount of rotation of the switching knob 98 with respect to the valve mount portion 112 is regulated by the action of the pin 122 and the elongated hole 124, and when the switching knob 98 is rotated to one end of the rotation range, the click ball 116 Engages with the click hole 118. The turning position of the switching knob 98 is the open position of the valve body 100. Switching knob 9
When the click 8 is turned to the other end of the turning range, the click ball 116 is engaged with the click hole 120. The turning position of the switching knob 98 is the closed position of the valve body 100.

A mount claw 126 is formed on the lower surface of the valve mount portion 112, and two pins 128 and 130, which are lock members, are fixed upward to the outside of the mount claw 126. The mounting claw 126
Is formed into a shape that can be engaged with the body mount 110 at a predetermined rotation position.
The valve mount portion 112 engaged with 10 is rotatably supported by the body mount portion 110.

The body mount 110 is shown in FIGS.
As shown in FIG. 7, a hole 132 into which the valve body 100 is fitted is formed at the center, and two claw plates 134 and 136 are formed on both left and right sides of the hole 132. The claw plates 134 and 136 are formed with concave grooves 138 and 140 for engaging the pins 128 and 130, respectively. Also,
A stopper pin 142 is fixed to one end of the claw plate 136. When the valve mount 112 rotates, the stopper pin 142 engages with the edge 126A of the mounting claw 126.
(See FIG. 9) and 126B (see FIG. 12) are in contact with each other to regulate the amount of rotation of the valve mount 112. For example, the edge 126A is the stopper pin 1
The position at which the valve mount portion 112 comes into contact with the body mount portion 110 is detachable from the body mount portion 110 (see FIG. 9).
2 (see FIGS. 12 and 13) are positions where the pins 128 and 130 on the valve mount 112 side engage with the grooves 140 and 138 on the body mount 110 side, respectively.

On the other hand, as shown in FIGS. 5 and 6, a coil spring 144 is disposed between the valve mount 112 and the valve body 100. The valve mount portion 112 and the valve main body 100 are urged away from each other by the urging force of the coil spring 144, and when the valve main body 100 is fitted and fixed in the mounting hole 62 of the projection 26, the coil spring 144 Power is transmitted to the valve mount 112. As a result, the valve mount 112 is kept in close contact with the lower surface of the switching knob 98 by the urging force of the coil spring 144. Further, a resin ring member 146 for improving finger grip is fixed to an outer peripheral portion of the valve mount portion 112. This ring member 146 is manually pressed from the outside in FIG. 13 to push down the valve mount 112 against the urging force of the coil spring 144, and
8, 130 and the grooves 140, 138 are disengaged.

Next, a method of attaching and detaching the switching valve of the suction channel switching device of the endoscope configured as described above will be described. When the switching valve 32 is mounted on the protrusion 26 of the hand operation unit 10, first, the mounting claws 126 of the valve mount 112 are aligned with the body mount 110 of the protrusion 26 as shown in FIG. Valve body 10
0 into the mounting hole 62 and the valve mount 11
2 is engaged with the body mount 110.

Next, the valve member 112 is retracted from the switching knob 98 by depressing the ring member 146.
In this state, the valve mount 112 is rotated clockwise in FIG. 9 with respect to the body mount 110. FIG.
FIGS. 0 and 11 are views showing a state immediately before the pins 128 and 130 of the valve mount 112 are engaged with the grooves 140 and 138 of the body mount 110 by rotation of the valve mount 112.

Then, the valve mount section 112 is
0, a small amount of clockwise rotation from the position shown in FIG. 11 in the clockwise direction in FIG.
The edge 126B of the sixth abuts against the stopper pin 142 on the body mount 110 side. In this position, the ring member 14
When the hand is released from 6, the valve mount 112 is returned to the original position by the urging force of the coil spring 144, and the pins 128 and 130 are engaged with the grooves 140 and 138. At this time, since the pins 128 and 130 are urged in the fixing direction by the coil spring 144, the valve mount 112 is fixed to the body mount 110. Thus, the mounting of the switching valve 32 is completed. When the switching knob 98 is rotated, the valve is opened and closed by the valve body 100 connected to the switching knob 98.

Next, when the switching valve 32 is to be removed from the projecting portion 26, first, the ring member 146 is pressed down from the position shown in FIG. And the grooves 140 and 138 are disengaged, and the fixed state between the valve mount 112 and the body mount 110 is released. In this state,
The valve mount 112 is rotated counterclockwise in FIG. Then, as shown in FIG. 9, the edge 126A of the mounting claw 126 abuts on the stopper pin 142, that is, the mounting claw 126 and the body mount 1
The switching valve 32 is pulled out of the body mount 110 at a position corresponding to the position 10. Thereby, the switching valve 32
Can be easily removed.

Therefore, according to the present embodiment, the switching valve 3
2 is a valve mount 112 and a body mount 110
The switching valve can be attached and detached with a single touch because the bayonet mount makes the attachment / detachment detachable from the hand operation unit 10. In the present embodiment, the grooves 138 and 140 are formed on the body mount section 110 side, and the valve mount section 112 is formed.
The holding means (locking means) is configured by attaching pins 128 and 130 to the body mounting portion 110 side.
The grooves 138 and 140 may be formed on the valve mount 112 side by attaching the holes 28 and 130. The unlocking means described in claim 3 of the present invention corresponds to the valve mount 112 and the coil spring 144 of this embodiment.

[0029]

As described above, according to the suction channel switching device for an endoscope according to the present invention, the switching valve can be detachably attached to the endoscope hand-held operating section via the bayonet mount. It can be easily attached and detached.

[Brief description of the drawings]

FIG. 1 is an external view of a hand operation unit to which an endoscope suction channel switching device according to the present invention is applied.

FIG. 2 is a longitudinal sectional view of a first forceps port including a hand operation unit.

FIG. 3 is a longitudinal sectional view of a second forceps port including a hand operation unit.

FIG. 4 is a sectional view of the hand operation unit shown in FIG. 1 taken along line AA.

FIG. 5 is a sectional view of the hand operation unit shown in FIG. 1 taken along line BB.

FIG. 6 is an assembled perspective view of a switching valve.

FIG. 7 is a perspective view of a body mount portion formed in the endoscope hand operation unit.

FIG. 8 is a plan view of the body mount shown in FIG. 7;

FIG. 9 is an explanatory diagram showing an engagement state of a switching valve with a body mount portion.

FIG. 10 is an explanatory diagram showing a rotation state of a switching valve with respect to a body mount portion.

FIG. 11 is a sectional view showing a state immediately before the switching valve is fixed to the body mount.

FIG. 12 is an explanatory diagram showing a state in which a switching valve is fixed to a body mount portion.

FIG. 13 is a sectional view showing a state in which a switching valve is fixed to a body mount portion.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 ... Hand operation part 26 ... Projection part 28, 30 ... Forceps port 32 ... Switching valve 44, 78 ... Forceps channel 98 ... Switching knob 100 ... Valve body 110 ... Body mount part 112 ... Valve mount part 126 ... Mounting claws 128, 130 … Pin 138, 140… Groove 142… Stopper pin 144… Coil spring 146… Ring member

Claims (5)

(57) [Claims] 1. An endoscope suction channel switching device provided in an endoscope hand-held operation unit, wherein a switching valve for communicating at least one of two channels inserted through an endoscope insertion unit to a suction unit is provided. In the above, the switching valve may be a valve mount portion detachable from the body mount portion at a first position of a body mount portion formed at a switching valve mounting position on the endoscope hand operation portion side; A valve body rotatably supported by a mount portion and communicating at least one of the two channels to suction means in conjunction with a rotation operation, provided on the body mount portion or the valve mount portion; and a holding means for holding the valve mount portion of the valve mounting portion in a second position a predetermined amount of rotation from the first position of the body mount portion, the valve Body through a turn restricting means the Barubumau
Rotatably supported by the port part and regulated by the rotation regulating means.
The rotation position at one end of the rotation range is the opening of the valve body.
Position and the rotational position on the other end is
A suction channel switching device for an endoscope, wherein the suction channel switching device is in a closed position . 2. A suction channel switching device for an endoscope, wherein a switching valve for connecting at least one of two channels inserted through the endoscope insertion portion to the suction means is provided in the endoscope hand operation portion. In the above, the switching valve may be a valve mount portion detachable from the body mount portion at a first position of a body mount portion formed at a switching valve mounting position on the endoscope hand operation portion side; A valve body rotatably supported by a mount portion and communicating at least one of the two channels to suction means in conjunction with a rotation operation, provided on the body mount portion or the valve mount portion; Locking means for fixing the valve mount to the body mount at a second position in which the valve mount is rotated by a predetermined amount from the first position of the body mount; The valve mounting part is provided between the valve body and the valve body, and urges the locking means in a direction in which the valve mounting part and the body mount part are fixed. and a lock release means for releasing the fixing of the body mount portion, wherein the valve body via a rotation restricting means Barubumau
Rotatably supported by the port part and regulated by the rotation regulating means.
The rotation position at one end of the rotation range is the opening of the valve body.
Position and the rotational position on the other end is
A suction channel switching device for an endoscope, wherein the suction channel switching device is in a closed position . 3. The valve mounting device according to claim 2, wherein
And a cutout of the valve body.
A guide pin provided on a replacement knob and engaged with the elongated hole
3. The method according to claim 1, comprising:
Endoscope suction channel switching device. 4. The valve mount part and the body mouse.
The valve mount for the body mount
A regulating member that regulates the amount of rotation of the
At the position where the amount of rotation is regulated by the material, push the valve mount
By releasing the pressure operation, the locking means
The valve mount is in the second position on the body mount.
3. The endoscope according to claim 2, wherein the endoscope is fixed at
Suction channel switching device. 5. The valve mounting part according to claim 5, wherein
And the body claw
A stopper that is provided and abuts the mounting claw.
5. The pin according to claim 4, wherein
Endoscope suction channel switching device.