JP4406268B2 - Water supply operation device for endoscope for perfusion observation - Google Patents

Description

  The present invention relates to a water supply operation device for an endoscope for observation under perfusion.

  In urological endoscopes and gynecological endoscopes, a technique to perform endoscopic observation in water while continuously injecting physiological saline into the organ (hereinafter referred to as “under-perfusion observation”) It is often done.

As an endoscope water supply operation device for performing such observation under perfusion, a cylinder body is attached to the operation section of the endoscope, and a piston body acting as a switching valve is pushed into the cylinder body with a fingertip. It is most common to adopt a configuration that allows it to be installed, and when the piston body is in a standby state where it is not pushed into the cylinder body, it enters the water supply state, and when the piston body is pushed into the cylinder body, the water supply is stopped. (For example, Patent Document 1).
JP 2000-139826, FIG. 4 and FIG.

  Even in the case of performing observation under perfusion while injecting physiological saline into an organ, there are few cases where it is necessary to stop water supply when performing various treatments other than simple endoscopic observation. Absent. Then, in the conventional water supply operation device for an observation endoscope for perfusion as described above, it is necessary for the operator to keep pushing the piston body with the fingertip, and thus the operator may not be able to sufficiently perform the treatment instrument operation. .

  Therefore, the present invention is in a water supply state for observation under perfusion in a standby state in which no piston body is operated, and it is not necessary to continue the operation to maintain the water supply stop state. It is an object of the present invention to provide a water supply operation device for an endoscope for perfusion observation that allows a person to freely operate a treatment tool with his / her hand.

  In order to achieve the above object, the water supply operation device of the endoscope for observation under perfusion according to the present invention is connected to a cylinder body in which a liquid supply pipe to which a liquid is supplied and a liquid supply pipe for sending out the liquid are connected. The piston body for switching the communication state between the liquid supply pipe and the liquid feed pipe is disposed so as to be movable back and forth in the axial direction, and the piston body is returned from the state where it is pushed into the cylinder body to the standby state where it is not pushed into the cylinder body. A compression coil spring energizing in the direction is provided so as to surround the axis of the piston body. In a standby state, the liquid supply pipe and the liquid feed pipe communicate with each other through the cylinder body, and the piston body is pushed into the cylinder body. Then, in the water supply operation device of the endoscope for observation under perfusion configured such that the space between the liquid supply pipe and the liquid supply pipe is closed by the piston body, a pin is protruded from the member connected to the piston body or the piston body. Setting The cylindrical member fixed at a coaxial position with respect to the cylinder body is formed so that the pin engages with a slanting groove that is inclined in the direction around the axis, and the piston body is compressed at the position where the piston body is pushed into the cylinder body. A click recess into which the pin is fitted by the axial biasing force of the coil spring is formed continuously with the oblique groove, and both ends of the compression coil spring are fixed to the piston body and the cylindrical member, so that the piston body is in the cylinder body. When the push-in operation is performed, the pin passes through the oblique groove and is fitted into the click recess so that the piston body is pushed into the cylinder body, and the rotational biasing force around the axis is stored in the compression coil spring. In this state, when the piston body is pushed against the axial biasing force of the compression coil spring, the compression coil spring rotates. As the pin is pushed from the click recess side to the skew groove side by the direction biasing force and the pushing operation of the piston body is released, the pin passes through the skew groove by the axial biasing force of the compression coil spring. It is made to return to the standby state.

  According to the present invention, when the piston body is pushed into the cylinder body, the pin passes through the oblique groove and is fitted into the click recess to maintain the piston body pushed into the cylinder body and the compression coil. When the piston body is pushed against the axial biasing force of the compression coil spring, the pin is clicked by the rotational biasing force of the compression coil spring. As the pin is pushed from the side to the skew groove side and the pushing operation of the piston body is released, the axial biasing force of the compression coil spring causes the pin to return to the standby state through the skew groove. In a standby state in which no body operation is performed, the water supply state for observation under perfusion is entered, and the operation is continued to maintain the water supply stop state. No need, it is possible also to surgeon in water stopped to operate freely treatment instrument in his hand.

  A pin is projected from a member connected to the piston body, and a slanting groove that is inclined in the direction around the axis is formed in a cylindrical member fixed at a coaxial position with respect to the cylinder body so that the pin engages. The click recess into which the pin is fitted by the axial biasing force of the compression coil spring at the position where the piston body is pushed into the cylinder body is formed continuously with the oblique groove, and the compression coil is applied to the piston body and the cylindrical member. Fix both ends of the spring.

Embodiments of the present invention will be described with reference to the drawings.
FIG. 1 shows a water feeding operation device for an endoscope for perfusion observation attached to an operation unit 1 of an endoscope, and a cylinder fixed to the operation unit 1 by a fixing nut 3 so as to open outward. A liquid supply pipe 4 to which a liquid such as physiological saline is supplied to the side surface and the bottom surface of the body 2, and a liquid supplied from the liquid supply pipe 4 into the cylinder body 2 is shown in an endoscope not shown. A liquid feed pipe 5 fed to the distal end of the insertion portion is connected.

  The piston body 7 disposed in the cylinder body 2 so as to be movable back and forth in the axial direction includes the cylinder body 2 so as to seal the opening of the liquid supply pipe 4 when the piston body 7 is pushed into the cylinder body 2. A seal member 10 that is in close contact with the inner wall surface is integrally attached.

  An operation button 12 that is pushed by an operator's fingertip is screwed and fixed to the protruding end of the piston body 7 that projects outward from the opening of the cylinder body 2, and the piston is located outward from the opening of the cylinder body 2. A compression coil spring 13 disposed so as to surround the axis of the body 7 always urges the operation button 12 outward by the urging force in the axial direction.

  Therefore, although the piston body 7 fixed to the operation button 12 is also urged in the direction of popping out from the cylinder body 2, the plastic mounting ring 17 that engages with the flange formed on the fixing nut 3 and The integral metal stopper ring 16 abuts against the intermediate step of the outer periphery of the piston body 7 as shown in FIG. 1, thereby preventing the piston body 7 from coming out of the cylinder body 2. The state is in the standby state.

  The attachment ring 17 is engaged with the fixed nut 3 so as not to rotate around the axis, and when performing disassembly and cleaning, the attachment ring 17 is elastically deformed to release the engagement with the fixed nut 3. Thus, the piston body 7 can be extracted from the cylinder body 2.

  One end side of the compression coil spring 13 is fixed to a spring fixing ring 14 that is screwed and fixed to the operation button 12 by silver brazing or the like, and the other end side is guided to a guide cylinder 15 ( It is also fixed to the cylindrical member by silver brazing or the like.

  The guide cylinder 15 as a whole is formed in a cylindrical shape having the same axis as that of the piston body 7, and a pair of columnar pins 21 projecting inward from the side surface of the operation button 12 are formed on the cylindrical portion. Engaging skew grooves 22 are formed (see FIG. 2). A pair of the pin 21 and the skew groove 22 are provided, for example, at positions 180.degree. Symmetrical.

  The oblique groove 22 has an open end at the outer end (upper end in FIG. 1) of the guide tube 15 and is inclined in the direction around the axis of the guide tube 15 as shown in FIG. It is formed in a shape that is inclined with respect to the direction parallel to the axis.

  Then, a click where the pin 21 is fitted by the axial biasing force of the compression coil spring 13 at the position where the piston body 7 is pushed into the cylinder body 2 at the end opposite to the open end continuously to the oblique groove 22. The recess 23 is formed in a direction returning in a direction parallel to the axis of the guide tube 15 by a dimension corresponding to the approximate radius of the pin 21.

  In the water supply operation device configured as described above, in the standby state in which no operation button 12 is operated, the liquid supply pipe 4 and the liquid supply pipe 5 are connected via the cylinder body 2 as shown in FIG. The physiological saline supplied from the liquid supply pipe 4 is sent into the body from the tip of the liquid supply pipe 5 and can be observed under perfusion.

  Then, the operator pushes the operation button 12 with the fingertip against the axial biasing force of the compression coil spring 13 (not pressing the operation button 12 all the time, but immediately after pushing the operation button 12 all the way from the fingertip. 3), as shown in FIG. 3, the pin 21 engaged with the skew groove 22 advances to the back side of the skew groove 22, and as shown in FIG. It will be in the state inserted in click crevice 23.

  Then, in this state, since the pin 21 is pressed against the click recess 23 by the axial biasing force of the compression coil spring 13, even if the operator releases the fingertip from the operation button 12, as shown in FIG. The state where the piston body 7 is pushed into the cylinder body 2 and the opening of the liquid supply pipe 4 is sealed by the seal member 10 is maintained.

  Therefore, in this state, the surgeon can release the fingertip from the operation button 12 and freely operate the treatment instrument as necessary, and can perform endoscopic treatment without restriction in the water supply stop state.

  Further, as shown in FIG. 3, as the pin 21 advances along the oblique groove 22, the pin 21 also rotates around the axis of the piston body 7, so that the operation button 12 rotates together therewith. The compression coil spring 13 is twisted around the axis.

  Therefore, in the state where the pin 21 is engaged with the click recess 23 as shown in FIG. 4, both the axial direction biasing force and the rotational direction biasing force are applied to the compression coil spring 13 as shown by the broken arrow in FIG. Is stored.

  As a result, when the surgeon next presses the operation button 12, as shown in FIG. 6, the pin 21 that is disengaged from the click recess 23 is clicked by the rotation direction biasing force of the compression coil spring 13. When the surgeon releases the finger from the operation button 12 (or loosens the pushing force), the pin 21 is moved along the skew groove 22 by the axial biasing force of the compression coil spring 13. Returning to the standby state shown in FIG. 1, the water supply operation device of the perfusion observation endoscope returns to the water supply state.

  In addition, this invention is not limited to the said Example, For example, it is also possible to take the structure which fixes the pin 21 to the piston body 7 directly, and takes various aspects as a concrete structure. Can do.

It is side surface sectional drawing of the standby (water supply) state of the water supply operation apparatus of the endoscope for perfusion observation of the Example of this invention. It is a perspective view of the guide cylinder of the Example of this invention. It is operation | movement explanatory drawing of the Example of this invention. It is operation | movement explanatory drawing of the Example of this invention. It is side surface sectional drawing of the pushing (water supply stop) state of the water supply operation apparatus of the endoscope for observation under perfusion of the Example of this invention. It is operation | movement explanatory drawing of the Example of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Operation part 2 Cylinder body 4 Liquid supply pipe 5 Liquid feed pipe 7 Piston body 12 Operation button 13 Compression coil spring 15 Guide cylinder (cylindrical member)
21 Pin 22 Skew groove 23 Click recess

Claims (1)

A piston body for switching the communication state between the liquid supply pipe and the liquid supply pipe is provided in the axial direction to a cylinder body connected with a liquid supply pipe to which the liquid is supplied and a liquid supply pipe for delivering the liquid. A compression coil spring, which is arranged so as to be able to advance and retract, and urges in a direction to return the piston body from being pushed into the cylinder body to a standby state where it is not pushed into the cylinder body, surrounds the axis of the piston body. In the standby state, the liquid supply pipe and the liquid supply pipe communicate with each other through the cylinder body, and in the state in which the piston body is pushed into the cylinder body, the liquid supply pipe, the liquid supply pipe, In the water feeding operation device of the endoscope for observation under perfusion configured to be closed by the piston body between,
A pin connected to the piston body or a pin projecting from the piston body, and the pin has a slanting groove that runs obliquely in the direction of the axis around a cylindrical member fixed at a coaxial position with respect to the cylinder body. A click recess is formed continuously with the skew groove in which the pin is fitted by an axial urging force of the compression coil spring at a position where the piston body is pushed into the cylinder body. Fixing both ends of the compression coil spring to the piston body and the cylindrical member;
When the piston body is pushed into the cylinder body, the pin passes through the skew groove and is fitted into the click recess to maintain the state where the piston body is pushed into the cylinder body and A rotational biasing force around the axis is stored in the compression coil spring, and when the piston body is pushed against the axial biasing force of the compression coil spring from this state, the rotational biasing force of the compression coil spring As the pin is pushed out from the click recess side to the skew groove side and the pushing operation of the piston body is released, the pin is pushed into the skew groove by the axial biasing force of the compression coil spring. A water supply operation device for an endoscope for observation under perfusion, characterized in that it is returned to the standby state through the inside.

Images