JPH01113070A - Treatment jig for endoscope - Google Patents

Abstract

PURPOSE:To release the connection state of a connection member when a slide member is slid and to certainly hold said slide member to a non-slidable state when sliding operation is unnecessary, by providing the connection member having an engaging part formed to the outer peripheral surface thereof to the base end of the slide member. CONSTITUTION:A syringe 1 for an endoscope is equipped with a jacket pipe 2 composed of a flexible member and an operating part 3 having a cylindrical main body 5 is provided to the base end of the jacket pipe 2. The base end part of the jacket pipe 2 is inserted in and fixed to the leading end of the main body 5 through a folding preventing part 6 and a cylindrical connection member 7 is inserted in the main body 5 on the base end side thereof in a freely slidable manner. A pair of strip parts 18 are formed to the peripheral wall of the small diameter part 12 of the main body 5 along the axial direction. A projection 17 is formed to the inner surfaces of the free ends of the strip parts and brought into engagement with the groove formed to the outer peripheral surface of the connection member 17 to be held to the main body 5 in a non-slidable manner by the strip parts 16.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an endoscopic treatment instrument that is used by being introduced endoscopically into a body cavity.

[Prior Art] For example, when directly injecting a medicinal solution into an affected area within a body cavity, it is known to introduce a syringe as a treatment tool using a channel of an endoscope.

Conventionally, such a syringe was manufactured by Japanese Patent Application Laid-Open No. 62-1270.
There is one shown in Publication No. 30. In the syringe disclosed in this publication, an injection tinib with a needle attached to its tip is slidably inserted into a mantle tube. A holder is attached to the proximal end of the mantle tube, and a pipe is connected to the proximal end of the injection tube. An O-ring is provided on the inner peripheral surface of the holder, and the pipe can be held at any position by the frictional force of the O-ring.

When in use, the injection tube is slid in the forward direction through the pipe, the distal needle provided at its tip protrudes from the distal end of the mantle tube, and the medicinal solution is injected by puncturing the affected area with the distal needle. . When the injection of the drug solution is completed, the injection tube is slid in the backward direction and the tip needle is pulled into the mantle tube.

[Problems to be solved by the invention] By the way, in an endoscopic syringe with such a structure, when sliding the injection tube in the forward direction or backward direction, the vibrator resists the frictional resistance of the O-ring. It will slide. Therefore, due to variations in the surface properties of the O-ring, etc., the sliding resistance of the vibrator is not constant. For example, if the resistance is large, the injection tube will be pushed in with a large force, and the tip needle will suddenly move away from the mantle tube. Problems arise such as poor operability, such as protrusion and inability to smoothly retract. Furthermore, when the frictional resistance is small, the injection tube slides freely, so there is a drawback that the distal needle cannot be reliably maintained in a protruding or retracted state from the mantle tube.

This invention was made based on the above-mentioned circumstances, and its purpose is to provide an endoscope that can be pushed and pulled reliably with a light force and that does not shift when not operated. The objective is to provide medical treatment tools.

[Means and effects for solving the problems] In order to solve the above-mentioned problems, the present invention provides a mantle tube, a main body of an operating section attached to the proximal end of the mantle tube, and a device that slides into the mantle tube. a slide member that is freely inserted; a coupling member that is attached to the proximal end of the slide member and has a locking portion formed on its outer circumferential surface; and a coupling member that is provided on the main body and can be operated to integrally integrate the coupling member with the main body. and an operating body that is coupled to and holds the slide member in a non-slidable manner. By operating this operating body, the slide member can be brought into a freely sliding state or a non-slidable state.

[Embodiment] A first embodiment of the present invention will be described below with reference to FIGS. 1 to 7. FIG. 3 shows an endoscopic syringe 1 as an endoscopic treatment instrument, and the syringe 1 is equipped with a mantle tube 2 made of a flexible member such as a tightly wound coil.

An operating portion 3 is provided at the proximal end of this mantle tube 2, and a tip tip 4 is provided at the distal end. The operating section 3 has a cylindrical main body 5 as shown in FIGS. 1 and 4. As shown in FIGS. As shown in FIG. 4, the proximal end portion of the mantle tube 2 is fitted into and fixed to the distal end of the main body 5 via a breakage member 6. As shown in FIG. Further, a cylindrical coupling member 7 is slidably inserted into the base end side of the main body 5. The connecting member 7 has a large diameter portion 8 formed in a portion protruding from the main body 5, and the inner peripheral surface of the large diameter portion 8 is formed into a tapered hole 9 for connecting a syringe (not shown).

The outer peripheral surface of this coupling member 7 has a large number of grooves 1 as locking parts.
1 is formed along its axial direction.

The base end portion of the main body 5 is formed into a small diameter portion 12 . An operating ring 13 as an operating body made of a material having a certain degree of elasticity such as synthetic resin is slidably fitted onto the small diameter portion 12. A groove 14 is formed on the inner circumferential surface of the distal end of the operating ring 13, and a pair of convex portions 15 are formed on the inner circumferential surface of the proximal end, offset by 180 degrees in the circumferential direction.

The dimension between the pair of convex portions 15 is set smaller than the outer diameter dimension of the small diameter portion 12.

On the other hand, a pair of band-shaped portions 16 are formed along the axial direction on the peripheral wall of the small diameter portion 12 of the main body 5, corresponding to the convex portion 15 of the operation ring 13. These band-shaped portions 16 are pressed by the convex portion 15 of the operating ring 13, so that their free ends are elastically deformed radially inward. A protrusion 17 is formed on the inner surface of the free end of this strip-shaped portion 16, and this protrusion 17 engages with a groove 11 formed on the outer peripheral surface of the coupling member 7. Therefore, the coupling member 7 is non-slidably held on the main body 5 by the strip portion 16.

The operating ring 13 is biased by a spring 18 in a direction to be pulled out from the small diameter portion 12. Further, a stopper ring 19 is fitted onto the end of the small diameter portion 12 to prevent the operating ring 13 from being pulled out. Furthermore, the main body 5
There is a convex strip 2 slightly on the tip side of the small diameter portion 12 on the outer peripheral surface of the
1 is formed. A concave groove 14 formed on the inner peripheral surface of the tip of the operating ring 13 elastically engages with this protrusion 21, and prevents the operating ring 13 from sliding in the extraction direction due to the biasing force of the spring 18. are doing. Note that the engagement and disengagement between the protrusion 21 and the groove 14 can be performed by strongly pushing and pulling the operation ring 13.

The above-mentioned mantle tube 2 has an injection tube 2 as a sliding member.
2 is slidably inserted. The proximal end of the injection tube 22 is connected to the distal end of the coupling member 7, and a tip needle 23 is attached to the distal end. This tip needle 23 is connected to a tip 4 attached to the tip of the mantle tube 2 by sliding the injection tube 22 as described later.
It can be made to protrude from the through hole 24 of. The inner surface of the distal tip 4 is formed into a tapered surface 25, and a stopper 26 attached to the distal end of the injection tube 2 comes into contact with this tapered surface 25, so that the protrusion of the distal needle 23 is regulated. Be as you are.

Next, how to use the syringe 1 will be explained. First, an insertion section of an endoscope (not shown) is introduced into the patient's body cavity, and then the mantle tube 2 of the syringe 1 is inserted into the channel of the endoscope. At this time, the tip needle 23 is retracted into the mantle tube 1. When the affected area is found under observation with the endoscope, the operation ring 13 is pulled and the concave groove 14 is inserted into the main body 5.
is removed from the protrusion 21 and moved back to a position where it abuts against the stopper ring 19 by the biasing force of the spring 18. Then,
Since the state in which the band-shaped portion 16 is suppressed by the convex portion 15 formed on the operating ring 13 is released, the protrusion 17 of the band-shaped portion 16 is removed from the groove 11 of the coupling member 7. therefore,
Since the coupling member 7 is in a state where it can freely slide relative to the main body 5, by pushing the coupling member 7 and advancing the injection tube 22, the distal needle 23 can be made to protrude from the through hole 24 of the distal tip 4. . In this state, the operation ring 13
When it is moved forward and the concave groove 14 at its tip engages with the protrusion 21, the band 16 is again pressed by the protrusion 15 at its base end, so that the coupling member 7 is held non-slidably. That is, the distal needle 23 can be reliably held in a state in which it protrudes from the distal tip 4.

Once the tip needle 23 has protruded in this way, it is inserted into the affected area, and in this state, the tapered hole 9 at the rear end of the coupling member 7
If you connect a syringe (not shown) to the and send the drug solution,
It can be injected directly into the affected area.

When the injection of the drug solution is finished, the operation ring 13 is moved back, the coupling member 7 is made slidable, the injection tube 22 is moved back, and the tip needle 23 is pulled into the mantle tube 2.

That is, according to the syringe 1 configured as described above, when moving the injection tube 22 forward and backward, the coupling member 7 can be made free with respect to the main body 5 of the operating section 3, so that the forward and backward operations can be performed smoothly with a light force. can be done. Also,
When puncturing the tip needle 23 into an affected area or inserting the mantle tube 2 into a channel of an endoscope, the connecting member 7 is connected to the main body 5 via the band 16 to ensure that it does not slide. Since it can be held, these operations can be performed safely.

FIG. 8 shows a second embodiment of the invention. This embodiment is a modification of the operating section 3, in which a spring 18 is provided between the rear end surface of the operating ring 13 and a stopper ring 19. In this way, since the operating ring 13 is biased by the spring 18 in a direction in which the convex portion 15 presses the band-shaped portion 16, a concave groove is formed in the operating ring 13 in order to maintain the coupled state of the coupling member 7. 14 or the protrusions 21 on the main body 5.

9 to 11 show a third embodiment of the present invention.

In this embodiment, a thread 31 is formed near the small diameter portion 12 on the outer peripheral surface of the main body 5, while a female thread 32 is formed on the inner peripheral surface of the tip end of the operating ring 13 to be screwed into the male thread 31.

Further, a tapered portion 33 is provided on the inner circumferential surface of the rear end portion of the operating ring 13.
A slider 35 having a tapered surface 34 that comes into contact with the tapered portion 33 is interposed between the tapered portion 33 and the strip portion 16 formed on the main body 5.

According to such a structure, when the slider 35 is pressed by the tapered portion 33 of the operating ring 13, the strip portion 16 is elastically deformed by the slider 35 as shown in FIG. 7 groove 1
1, this coupling member 7 is held non-slidably. Further, when the operating ring 13 is rotated in the backward direction, the pressing force exerted on the slider 35 by the tapered portion 33 is removed, so that the strip portion 16 is restored and the protrusion 17 is connected as shown in FIG. It comes off from the groove 11 of the member 7,
This coupling member 7 can be freely slid.

12 to 15 show a fourth embodiment of the present invention. In this embodiment, a pair of hemispherical protrusions 36 are provided on the inner surface of the tip end of the operating ring 13 at intervals of 180 degrees in the circumferential direction, and on the outer peripheral surface of the main body 5 of the operating section 3 as shown in FIG. A large number of hemispherical engagement grooves 37 are formed at predetermined intervals in the circumferential direction, and the pair of protrusions 36 are elastically engaged with the engagement grooves 37 to rotate the operating ring 13 in a predetermined rotation in the circumferential direction. It can now be held in a moving position. Further, an elliptical hole 38 is formed in the inner circumferential surface of the rear end portion of the operating ring 13, and a sphere 39 is interposed between the inner surface of the elliptical hole 38 and the band-shaped portion 16. Note that a concave surface 40 is formed on the outer surface of the band-shaped portion 16 to ensure that the contact state with the sphere 39 is maintained.

According to such a structure, as shown in FIG. 14, when the short diameter of the elliptical hole 38 is located in the direction connecting the pair of band-shaped parts 16, the sphere 39 is pressed by the inner surface of the elliptical hole 38, so that the band-shaped part 16 is elastically deformed and the protrusion 17 becomes the connecting member 7.
is engaged with the groove of

From this state, if the operating ring 13 is rotated about 90 degrees in the circumferential direction to position the long diameter of the elliptical hole 38 in the direction of the pair of band-shaped parts 16 as shown in FIG.
Since the suppressed state of 9 is released, the coupling member 7 can be slid.

In other words, the coupling member 7 can be made slidable or non-slidable simply by rotating the operating ring 13 by 90 degrees, resulting in good operability.

FIGS. 16 to 19 show a fifth embodiment of the present invention. In this embodiment, the strip portion 16 is not formed on the main body 5 of the operating portion 3, but an annular groove 41 is formed at the base end thereof. This annular groove 4
1, a pair of through holes 42 are bored in the bottom of the hole 42, shifted by 180 degrees in the circumferential direction, and each through hole 42 is provided with a sphere 43, respectively.

Further, a ring 44 serving as an operating body is rotatably provided in the annular groove 41. The inner circumferential surface of this ring 44 is formed from a pair of curved surface portions 45 and a flat portion 46, and the dimension between the pair of curved surface portions 45 is set larger than the dimension between the pair of flat portions 46. Then, as shown in FIG. 18, when the pair of flat parts 46 are positioned in the direction connecting the pair of spheres 43,
These flat portions 46 allow the sphere 43 to move into the groove 1 of the coupling member 7.
1 and is held in a depressed state. Therefore, the coupling member 7 is held non-slidably by the main body 5. Further, if the ring 44 is rotated 90 degrees from the state shown in FIG. 18 and the pair of curved surfaces 45 are positioned opposite to the sphere 43 as shown in FIG. 19, the suppressed state of the sphere 43 is released. The coupling member 7 can be freely slid from the position.

In each of the above embodiments, an endoscopic syringe is used as the treatment instrument, but the treatment instrument may also be, for example, a needle-like high-frequency cutting instrument for an endoscope, and the point is that it requires a sliding operation when used. It is fine as long as it is something.

〔Effect of the invention〕

As described above, the present invention provides a coupling member having an engaging portion formed on the outer peripheral surface at the proximal end of a slide member that is slidably inserted into the mantle tube, and connects the coupling member to the proximal end of the mantle tube. It can be held in a non-slidable manner by operating the operating body on the main body provided in the main body. Therefore, when sliding the sliding member, by releasing the connected state of the connecting member, the sliding operation can be performed easily with light force and smoothly without sudden protrusion, and there is no need to perform the sliding operation. When there is no slide member, the slide member can be reliably held in a non-slidable manner by coupling the coupling member to the main body.

[Brief explanation of the drawing]

1 to 7 show a first embodiment of the present invention, in which FIG. 1 is a half-sectional view of the operating section, FIG. 2 is a sectional view of the tip of the flexible tube, and FIG. 3 is a sectional view of the syringe. A perspective view, FIG. 4 is a half-sectional view of the connecting portion between the operating section and the mantle tube, FIG. 5 is a half-sectional view of the connecting portion between the coupling member and the injection tube, and FIG.
A sectional view taken along line A, FIG. 7 is a plan view of a strip formed on the operating section, FIG. 8 is a half sectional view of the operating section showing a second embodiment of the present invention, and FIG. 9 is a cross-sectional view of the operating section according to the second embodiment of the present invention. FIG. 10 is a sectional view taken along line B-B in FIG. 9, and FIG. 11 is a sectional view of the coupling member in a state where the coupling member is released. , FIG. 12 is a half-sectional view of the operating section showing the fourth embodiment of the present invention, and FIG.
14 is a sectional view taken along the line C-C in the figure, FIG. 14 is a sectional view taken along the line D-D in FIG. 17 is a half-sectional view of the operating section showing the fifth embodiment of the present invention; FIG. 17 is a plan view of the annular groove portion formed in the operating section 1;
Figure 8 is a sectional view taken along line E-E in Figure 16, and Figure 19.
The figure is also a sectional view of the coupling member in a state where the coupling state is released. 2... Mantle tube, 3... Operation section, 5... Main body, 7.
... Connection member, 13 ... Operation ring (operation body), 22
...Injection tube (slide member). Applicant's agent Patent attorney Atsushi Tsuboi

Claims (1)

[Claims] A mantle tube, a main body of the operating section attached to the base end of the mantle tube, a slide member slidably inserted into the mantle tube, and a slide member attached to the base end of the slide member and locked to the outer circumferential surface. and an operating body that is provided on the main body and that, when operated, integrally couples the coupling member to the main body and holds the slide member in a non-slidable manner. Treatment instruments for endoscopes.