TW202100087A - Overtube assembly - Google Patents

Abstract

An outside tube assembly has an outside tube capable of adjusting length. The outside tube assembly includes an outside tube and a mouth tube. The outside tube has a plurality of recesses (e.g., grooves) on its outer periphery. The mouth tube has a stuck part (e.g., a protrusion or a ridge) locked in the recesses. The mouth tube can be moved between a stuck position and a non-sticking position, wherein the stuck part is a positon for the stuck part stuck in the recesses. The non-sticking position is a position for the stuck part that does not stick in the recesses.

Description

Outer casing assembly

The invention relates to an outer sleeve assembly.

In the past, for example, as an outer sleeve assembly for an endoscope, the following outer sleeve assembly is known. The outer sleeve assembly includes: an outer sleeve, which is inserted into the endoscope; and an adapter, which is provided at the base end of the outer sleeve; And the mouthpiece, which fixes the overtube to the subject (for example, refer to Patent Document 1).

In addition, as a medical tube, a bellows tube is known (for example, refer to Patent Document 2).

However, in the outer tube of Patent Document 1, because the plastic tube contains a metal coil for reinforcement, it is difficult to cut the outer tube to adjust to an appropriate length in a medical field. Therefore, it is necessary to prepare multiple outer sleeves of different lengths to suit subjects of various sizes.

The medical tube of Patent Document 2 is nothing but a corrugated tube. Furthermore, Patent Document 2 does not disclose or teach cutting the bellows tube to adjust the length. Prior art literature Patent literature

Patent Document 1: Japanese Patent Laid-Open No. 2008-220794. Patent Document 2: Japanese Patent Laid-Open No. 2014-113179.

Summary of the invention Problems to be solved by the invention The subject of the present invention is to provide an outer sleeve assembly that can adjust the length from the mouthpiece to the front end of the tube. Means to solve the problem

The outer sleeve assembly (1) of the embodiment of the present invention has: The outer sleeve (2) is in the shape of a hollow cylinder, has flexibility, and has openings at both ends; and The mouthpiece (3) is movably installed on the outer periphery of the aforementioned outer sleeve (2) along the central axis of the outer sleeve (2), The outer sleeve (2) has a plurality of recesses (5), and the plurality of recesses (5) are arranged on the outer periphery of the outer sleeve (2) at predetermined intervals along the central axis direction of the outer sleeve (2), The mouthpiece (3) has a locking portion (19), and the locking portion (19) is locked in the concave portion (5) of the outer sleeve (2).

According to the overtube assembly (1) of the embodiment thus constituted, by selecting the recess (5) for the locking portion (19) of the mouthpiece (3) to be locked, the mouthpiece (3) relative to the overtube ( The position of 2) can be adjusted from the interface tube (3) to the front end of the outer tube (2). Therefore, there is no need to keep multiple outer tubes of different lengths as inventory.

The form used to implement the invention The embodiment of the sleeve assembly outside the present invention will be described according to the attached drawings. In the following description, the end of the overtube inserted into the subject (patient) is called the "end", and the end on the opposite side is called the "base end". When the overtube is viewed from the base end side to the end side , And refer to the left and right sides of the outer sleeve as "left" and "right" respectively.

The overtube assembly 1 for an endoscope of this embodiment shown in FIG. 1 roughly includes an overtube 2, a mouthpiece 3, and a adaptor 4.

The outer sleeve 2 is formed by forming a synthetic resin material (for example: polyethylene) into a hollow cylindrical shape with openings at both ends, and its structure and thickness are determined to be easily bent with a small force.

For example, as shown in FIG. 3, the sleeve 2 outside this embodiment is a flexible hose in which small diameter parts and large diameter parts are alternately and continuously arranged in the central axis direction. Specifically, on the outer peripheral surface of the overtube 2, alternately formed in the longitudinal direction of the overtube 2 (the direction of the central axis of the overtube): outer annular grooves (recesses) 5, recessed radially inward; and The outer annular convex portion 6 is located between adjacent outer annular groove portions 5 and protrudes radially outward. As shown in the figure, the width of the outer annular groove portion 5 (specifically, the distance W between a pair of side surfaces that constitute the groove portion and face each other in the axial direction) gradually increases from the bottom of the groove portion toward the outside in the radial direction.

On the inner peripheral surface of the outer tube 2, at predetermined intervals in the central axis direction of the outer tube 2 are formed: an inner annular groove 7 recessed radially outward; and an inner annular protrusion 8 located adjacent The inner annular grooves 7 protrude radially inwardly between them.

In the embodiment, the outer annular groove portion 5 and the inner annular convex portion 8 are spaced apart and opposed to each other by a certain distance, and the outer annular convex portion 6 and the inner annular groove portion 7 are separated by a certain distance from each other. In the opposite direction, the entire outer sleeve 2 is given a certain thickness t.

The size and thickness of the grooves and protrusions of the outer sleeve 2 are determined in the following way: the outer sleeve 2 can be easily bent with a small force, and even if it is deemed that the force acting on the outer sleeve 2 occurs during use The function will not be crushed or bent and maintain a stable cylinder channel inside. Therefore, the endoscope into which the outer sleeve 2 is inserted from its base end can be pushed to the end of the outer sleeve 2 with a small force. Of course, the outer tube 2 of the embodiment is a hose in which large-diameter parts and small-diameter parts are alternately arranged continuously. Therefore, it is more rigid to bending than a tube with a fixed diameter without such large-diameter parts and small-diameter parts. Larger. Therefore, even if the thickness of the tube is the same, the hose of the embodiment will not be bent and crushed as easily as a fixed diameter tube even if it is subjected to an unexpectedly large bending force during use (during intubation). A stable space for inserting the endoscope can be ensured.

The specific dimensions of each part of the outer sleeve 2 are as follows. Diameter D of outer sleeve 2: 15.0mm~20.0mm The thickness of the outer casing 2 t: 0.3mm~1.0mm Pitch size P of the outer annular convex part 6: 2.0mm~4.0mm The width dimension W1 of the outer annular convex part 6: 1.0mm~2.5mm The width dimension W2 of the outer annular groove 5: 1.0mm~2.5mm Projection size H of outer annular convex part 6: 1.2mm~2.0mm In this case, the order of priority when determining the size of each part is the order described above. For the strength of crushing when bending force acts on the tube, the diameter D of the cross section and the thickness t of the tube have a great influence. Next, in the order of the pitch dimension P of the outer annular convex portion, the width dimension W1 of the convex portion, the width dimension W2 of the groove portion, and the protrusion dimension H, the strength and the ease of bending are affected.

By determining the size of each part of the outer tube 2 in this way, the outer tube 2 itself can be lightened. In addition, since the outer annular groove portions 5 and the outer annular convex portions 6 are alternately and continuously arranged, rigidity can be improved, and even if the outer tube 2 is bent, the cylindrical shape can be maintained without crushing the internal space. In this way, the overtube 2 has a lightweight and easily bent structure, and therefore can be smoothly inserted into the body (for example, from the oral cavity to the esophagus).

As shown in the figure, at least the corners of the outer ring convex portion 6 extending in the circumferential direction should be smoothly chamfered. Thereby, when the overtube 2 is inserted from the mouth of the subject, the throat or esophagus will not be injured.

In the embodiment, although the surfaces of the outer annular groove portion 5 and the inner annular convex portion 8, particularly the inner and outer surface shapes appearing in FIG. 3, are made into a substantially bracket shape, the outer annular groove portion may be 5. At least one surface of the outer annular convex portion 6, the inner annular groove portion 7, and the inner annular convex portion 8 is formed into a substantially circular shape, a substantially U-shape, or a substantially triangular shape.

Returning to FIGS. 1 and 2, in the embodiment, a cylindrical casing 9 is fixed to the end of the outer tube 2. The material constituting the outer shell 9 is a material softer than the outer sleeve 2, for example, silicon rubber is preferable. Of course, the housing 9 can also be formed of materials other than silicon rubber (for example, polyvinyl chloride, which is harder than silicon rubber). In this case, by reducing the thickness of the housing 9, the required flexibility of the housing 9 can be ensured.

In the embodiment, as shown in FIG. 2, the outer periphery of the housing end portion 9a is formed as a tapered surface that gradually becomes smaller in outer diameter toward the end. On the inner peripheral surface of the housing 9, there are alternately formed small-diameter annular convex portions 9b and large-diameter annular groove portions 9c corresponding to the shape of the outer annular groove 5 and the outer annular convex portion 6 of the outer sleeve 2, and the outer annular groove 9c The small-diameter annular convex portion 9b and the large-diameter annular groove 9c of 9 are respectively fitted into the outer annular groove 5 and the outer annular convex portion 6 of the outer tube 2 to fix the casing 9 to the outer tube 2.

The mouthpiece 3 is formed of a synthetic resin material (for example, ABS resin) harder than the outer tube 2, and has a hollow cylindrical insertion tube portion 10 as shown in FIGS. 2 and 4. A hollow cylindrical cushion member 30 is attached to the insertion tube 10. The cushion member 30 is made of a soft material such as urethane or silicone rubber, and is inserted into the subject's mouth in a state of being fixed by a flange portion 10D formed at the tip portion of the insertion tube portion 10. With the cushion member 30 interposed therebetween, it is easier for the subject to bite.

The insertion cylindrical portion 10 has a first cylindrical surface 10A through which the overtube 2 is inserted. The first cylindrical surface 10A, that is, the cross-sectional shape of the passage through which the cylindrical portion 10 is inserted, is not a perfect circle, but has a shape that expands in the left-right direction relative to the up-down direction. That is, as shown in FIG. 8, the first cylindrical surface 10A is composed of a small-diameter arc surface 10a and a large-diameter arc surface 10b, and the small-diameter arc surface 10a is configured as an upper and lower part and is close to the outer sleeve 2; The large-diameter circular arc surface 10b is configured as a left and right portion, and the inner diameter size is small and the diameter circular arc surface 10a is large. In addition, the cross-sectional area of the passage of the insertion tube 10 is only slightly larger than the cross-sectional area of the passage of the outer sleeve 2.

A face plate (flange) 11 is fixed to the proximal end of the insertion cylinder 10. The panel 11 extends along the entire circumference of the proximal end of the insertion tube 10 and expands outward in the radial direction from the proximal end. In the embodiment, the panel 11 is expanded more in the left-right direction than the up-down direction. The left and right flanges of the panel 11 are gently bent toward the distal end of the insertion tube 10, and the subject bites the insertion tube 10 with the cushion member 30 in the mouth. The left and right flanges are formed along the receiving tube. The cheek of the examiner. The left and right flange portions of the panel 11 are formed with openings 11a for oral care, and the outer ends of the left and right flange portions are integrally formed with hooks 14 for locking fixing cords and the like.

The bracket 12 is integrally fixed to the base end side surface of the panel 11 (the surface on the opposite side to the surface to which the insertion tube 10 is connected). In the embodiment, the bracket 12 has a pair of flanges 15 extending from the panel 11 to the base end side. In the embodiment, the pair of flanges 15 are composed of an upper flange and a lower flange provided at a predetermined interval in the vertical direction. As shown in Figure 4, the lower surface of the upper flange (the lower flange facing surface) and the upper surface of the lower flange (the upper flange facing surface) are formed along the second cylindrical surface 10B. The surface 10B extends the first cylindrical surface 10A inserted into the cylindrical portion 10 toward the proximal side. These first cylindrical surface 10A and second cylindrical surface 10B (to be precise, the lower surface of the upper flange portion and the upper surface of the lower flange portion) form a cylindrical passage 10C through which the outer sleeve 2 is inserted.

As shown in Fig. 4, a groove-shaped positioning portion (recessed portion) 16 is formed in the circumferential center of the lower surface of the cylinder of the upper flange and the upper surface of the cylinder of the lower flange. The base end side ends of the flange and the lower flange extend toward the distal end side. In addition, the left and right edges of the upper flange are respectively extended outward to form the upper bearing flange 17, and similarly, the left and right edges of the lower flange are respectively extended outward to form the lower bearing flange 17 .

The upper and lower bearing flanges 17 are respectively formed with bearing holes 17a, and the bearing holes 17a are formed along an axis (not shown) extending in the vertical direction perpendicular to the central axis of the cylindrical passage 10C. Between the upper and lower bearing flanges 17, left and right lock plates (rotating members) 13 are arranged. Each lock plate 13 has an end side portion 18a and a base end side portion 18b. The end side portion 18a and the base end side portion 18b of the two lock plates 13 and the inner surfaces of the upper and lower flanges 15 constitute an inner cylindrical surface having approximately the same channel cross-sectional shape as the cylindrical channel 10C, or slightly larger Large inner cylindrical surface. The inner surface of the distal end portion 18a and the inner surface of the proximal portion 18b are not aligned neatly, and the inner surface of the proximal portion 18b extends obliquely outward in the radial direction from the proximal end of the distal cylindrical inner surface. A locking portion (first locking portion) 19 is formed on the inner surface of the distal end side portion 18a of each lock plate 13. In the embodiment, the locking portion 19 is constituted by a ridge substantially corresponding to the shape of the outer annular groove 5 of the overtube 2. Instead, the locking portion 19 may also be one protrusion or a plurality of protrusions. As shown in FIG. 4, a plurality of protruding bars may be provided on each lock plate 13. The interval between the protrusions or protrusions is preferably set to the tooth pitch of the outer annular groove 5 or an integer multiple thereof.

The height (the vertical dimension) of the distal end side portion 18a and the base end side portion 18b is substantially equal to the distance between the upper bearing flange 17 and the lower bearing flange 17. In the upper and lower edge portions near the boundary between the distal end portion 18a and the proximal end portion 18b, shaft portions (rotating shafts) 20 respectively protruding in the up and down direction are formed therefrom. Therefore, the left and right lock plates 13 are arranged between the upper and lower bearing flanges 17 with the shaft portion 20 inserted into the upper and lower bearing holes 17a, and are at the locking position (position shown in Figures 4 and 7) and Shake between non-locking positions (not shown), the locking position is the position where the locking portion 19 enters the inner side of the second cylindrical surface 10B; the non-locking position is the locking portion 19 retracted to the second cylindrical surface The position on the outside of the surface 10B.

As shown in FIG. 1, the adapter 4 is detachably mounted on the base end of the outer sleeve 2. As shown in FIG. 5, the adapter 4 is made of a cylinder made of a relatively soft synthetic resin material (for example, silicone rubber). In the embodiment, the adapter 4 has a cylindrical portion 21 on the tip side. The cylindrical portion 21 has an inner diameter that is approximately the same as the outer diameter of the outer tube 2 and an outer diameter that is approximately the same as the inner diameter of the second cylindrical surface 10B on the proximal side of the mouthpiece 3.

On the upper and lower portions of the outer peripheral surface of the cylindrical portion 21, positioning portions (convex portions) 24 projecting outward in the radial direction are formed. The positioning portion 24 corresponds to the inner surface positioning portion (recessed portion) 16 of the upper and lower flanges 15.

On the inner surface of the cylindrical portion 21, a locking portion (second locking portion) 25 protruding inward is formed. In the embodiment, the locking portion 25 is composed of one or a plurality of protrusions (here, two) approximately corresponding to the shape of the outer annular groove 5 of the outer sleeve 2. Instead, the locking portion 25 may also be one protrusion or a plurality of protrusions.

The base end of the cylindrical portion 21 is connected to the conical cylindrical portion 22. The inner diameter of the conical cylindrical portion 22 gradually expands from the base end toward the distal end side. The end of the conical cylindrical portion 22 is connected to the annular portion 23. The annular portion 23 extends radially inward from the distal end of the conical cylindrical portion 22, and has a circular opening 23a formed in the center. An annular valve 23b is further formed from the opening 23a, and the inner diameter of the annular valve 23b gradually decreases toward the proximal side. The ring valve 23b is thinned to be easily deformable. In addition, the center hole 23c of the ring valve 23b is determined to be smaller than the outer diameter of the insert (for example, an endoscope) inserted into the overtube 2. Therefore, on the outer periphery of the insert inserted into the adapter 4 from the center hole 23c, the inner peripheral edge of the center hole 23c is in close contact with the contact portion to form a seal.

When the overtube assembly 1 composed of the above configuration is combined with the mouthpiece 3, the overtube 2 to which the housing 9 is fixed on the tip side is inserted into the cylindrical channel 10C of the mouthpiece 3 from the tip or base side. At this time, the left and right lock plates 13 are set at the non-locking position, and the locking portion (first locking portion) 19 of the distal end portion 18a does not interfere with the outer casing inserted from the distal side to the proximal side or the opposite direction Tube 2.

In order to adjust the length of the outer tube 2 according to the body shape of the subject, the base end side of the mouthpiece 3 is cut to a necessary length. At this time, since the thickness of the outer sleeve 2 is small, and the endless outer annular groove 5 continues in the circumferential direction, the cut ends can be completely aligned. In addition, since the tooth pitch of the outer annular groove 5 is fixed, the cutting position can be easily recognized. For example, when the outer annular groove portion 5 is formed with a pitch of 3 mm, in order to cut 3.0 cm, the length can be measured without placing a scale, and the outer annular groove portion 5 may be cut roughly at the position of the tenth outer annular groove portion 5 from the base.

After adjusting the length of the outer sleeve 2, the adapter 4 is inserted into the base end of the outer sleeve 2. Thereby, the inner surface locking portion (second locking portion) 25 of the adapter 4 is embedded in the outer annular groove portion 5 of the outer tube 2, and the adapter 4 is detachably fixed to the outer tube 2.

When in use, that is, when intubating, insert the endoscope into the overtube 2 beforehand, insert the endoscope into the esophagus of the subject, and move the overtube 2 along the endoscope from the subject’s mouth to the throat. Insert into the esophagus. At this time, since the outer annular groove portion 5 and the inner annular groove portion 7 are alternately continuous in the outer tube 2, the outer tube 2 is easily bent according to the shape of the larynx and esophagus. In addition, even if a local force is applied to the outer sleeve 2 from the outside, the inner diameter of the tube will not be locally reduced due to the existence of the annular wall. The mouthpiece 3 is inserted into the barrel 10 into the mouth of the subject, and the cords attached to the left and right hooks 14 are wound around the back of the subject to fix it to the subject.

After the end of the outer sleeve 2 is inserted to the target position, the end sides of the left and right lock plates 13 are pushed in the other direction. Thereby, the lock plate 13 moves from the non-locking position to the locking position, the locking portion 19 is fitted into the outer annular groove portion 5 of the outer tube 2 and the outer tube 2 is fixed to the mouthpiece 3.

Furthermore, after the end of the outer sleeve 2 is inserted to the target position, the positioning portion (convex portion) 24 of the adapter 4 is fitted into the positioning portion (concave) 16 of the mouthpiece 3, and prevents the outer sleeve 2 from rotating (around the mouthpiece) 3 The rotation of the central axis).

In this state, an insert such as an endoscope is inserted into the body of the subject through the overtube 2 from the center hole 23c of the adapter 4, removed, and the intended treatment is performed.

After the treatment, when removing the overtube 2 to be inserted from the subject, push the base ends of the left and right lock plates 13 in the other direction to move the lock plates 13 from the locked position to the non-locked position mobile. Thereby, the outer sleeve 2 can be pulled out of the subject's body.

The outer sleeve assembly of the above-mentioned embodiment can have various changes.

For example, the groove formed on the outer peripheral surface of the outer sleeve 2 does not need to be an endless annular groove, and may be formed as one or a plurality of spiral grooves connected spirally.

In addition, the first locking portion 19 may not be provided in the distal end portion (18a) of the lock plate 13, but may be provided in the proximal end portion (18b).

In addition, as described above, although the lock plates 13 are provided on the left and right sides of the mouthpiece 3, at least one of them is sufficient. However, as shown in the above-mentioned embodiment, if the lock plates 13 are arranged on the left and right sides of the mouthpiece 3, the lock plates 13 can be pressed with, for example, the thumb and index finger, so that a more stable locking (non-locking) is achieved. Stop) operation.

1: Outer tube assembly 2: outer tube 3: Interface tube 4: Adapter 5: Outer annular groove (concave) 6: Outer ring convex 7: Inside annular groove 8: inner ring convex 9: Shell 9a: The end part of the shell 9b: Small diameter ring convex 9c: Large diameter annular groove 10: Insert the barrel 10a: Small diameter arc surface 10b: Large diameter arc surface 10A: The first cylindrical surface 10B: 2nd cylindrical surface 10C: Cylindrical channel 10D: Flange 11: Panel (flange) 11a: opening 12: Bracket 13: Lock plate (rotating member) 14: hook 15: flange 16: positioning part (concave part) 17: Bearing flange 17a: Bearing hole 18a: End side part 18b: Base end part 19: Locking part (1st locking part) 20: Shaft (rotation shaft) 21: Cylinder 22: Cone cylindrical part 23: Ring 23a: opening 23b: Ring valve 23c: Center hole 24: Positioning part (convex part) 25: Locking part (Second locking part) 30: Pad member D: diameter H: Protruding size P: Pitch size W: distance W1: width size W2: width size t: thickness

Fig. 1 is a perspective view of an overtube assembly according to an embodiment of the present invention. Fig. 2 is an exploded perspective view of the outer sleeve assembly shown in Fig. 1. Fig. 3 is a partial enlarged cross-sectional view of the outer sleeve constituting the outer sleeve assembly shown in Fig. 1. Fig. 4 is a perspective view of a part of the mouthpiece constituting the outer sleeve assembly shown in Fig. 1 cut away. Fig. 5 is a perspective view of a part of the adaptor constituting the outer sleeve assembly shown in Fig. 1 cut away. Fig. 6 is a perspective view of a part of the outer sleeve assembly shown in Fig. 1 cut away. Fig. 7 is a perspective view of a part of the outer sleeve assembly shown in Fig. 1 cut away. Fig. 8 is a partial perspective view seen from the side opposite to the mouthpiece side of the overtube assembly shown in Fig. 1.

2: outer tube

3: Interface tube

4: Adapter

5: Outer annular groove (concave)

7: Inside annular groove

8: inner ring convex

10: Insert the barrel

10C: Cylindrical channel

11: Flat plate (flange)

16: positioning part (concave part)

23: Ring

23a: round opening

23b: Ring valve

23c: Center hole

24: Positioning part (convex part)

25: Locking part (Second locking part)

Claims (9)

An outer sleeve assembly, which is characterized by having: The outer sleeve is in the shape of a hollow cylinder, has flexibility, and has openings at both ends; and The mouthpiece is movably installed on the outer circumference of the outer sleeve along the central axis of the outer sleeve, The aforementioned outer sleeve has a plurality of recesses, and the plurality of recesses are provided on the outer periphery of the outer sleeve at a predetermined interval along the central axis direction of the outer sleeve, The mouthpiece has a locking portion that is locked to the concave portion of the outer tube. For example, the sleeve assembly outside claim 1, wherein the aforementioned locking portion is configured to be movable between a locking position and a non-locking position, the locking position is a position locked to the aforementioned recess; the non-locking position is not It is locked at the position of the aforementioned recess. For example, the sleeve assembly outside claim 1, wherein the aforementioned mouthpiece has: a cylindrical channel inserted through the aforementioned outer sleeve, The locking portion is configured to be movable between a locking position and a non-locking position, the locking position is a position where it enters the cylindrical passage and is locked in the recess; the non-locking position is from the cylindrical passage The retreat does not stop at the position of the aforementioned recess. For example, the sleeve assembly other than claim 3, wherein the aforementioned mouthpiece has: a rotating member that rotates around a shaft portion that is arranged in a direction perpendicular to the central axis of the aforementioned cylindrical passage, The aforementioned rotating member has: a distal end portion located on the distal side of the aforementioned shaft portion; and a proximal end portion located on the proximal side of the aforementioned shaft portion, The said locking part is provided in either the said terminal side part or the said base end side part. As in claim 4, the sleeve assembly, wherein the rotating member is arranged on both sides of the cylindrical passage so as to sandwich the cylindrical passage and face each other. As in any one of claims 1 to 5, the outer sleeve assembly, wherein the aforementioned recess is a groove extending along the circumferential direction of the aforementioned outer sleeve. As in claim 6, the outer sleeve assembly, wherein the groove is an annular groove extending endlessly along the circumferential direction of the outer sleeve. As in claim 6, the outer sleeve assembly, wherein the aforementioned groove is a spiral groove extending spirally along the circumferential direction of the aforementioned outer sleeve. For example, the outer sleeve assembly in any one of claim 6 to claim 8, wherein the aforementioned locking portion is an elongated convex strip corresponding to the aforementioned groove.

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