JP4611511B2 - Endoscopic tube treatment device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an endoscopic tubular treatment tool in which a flexible sheath is formed of a tube.
[0002]
[Prior art]
In a tube-shaped treatment instrument for an endoscope in which a flexible sheath is formed by a tube (hereinafter referred to as “sheath tube”), generally, the proximal end of the sheath tube is connected to the proximal side base, and further, the sheath In order to suppress the tube from being bent with a small radius of curvature near the proximal end, a short flexible folding tube is disposed around the proximal end of the sheath tube.
[0003]
[Problems to be solved by the invention]
In the conventional endoscopic tube-shaped treatment instrument as described above, the proximal end of the sheath tube is connected and fixed to the proximal side base, and separately, the folding prevention tube is connected and fixed to the proximal side base.
[0004]
However, in order to prevent infection from patient to patient, it is preferable that the tube-shaped treatment instrument for an endoscope is disposable after one use, and at the same time, an economically inexpensive structure is required. Medical waste needs to be reduced as much as possible.
[0005]
Therefore, an object of the present invention is to provide an endoscopic tube-shaped treatment instrument that can be manufactured at a low cost by reducing the number of parts as much as possible and facilitating assembly.
[0006]
[Means for Solving the Problems]
In order to achieve the above-described object, the tubular treatment instrument for an endoscope according to the present invention is configured such that the proximal end of the flexible sheath tube is connected to the proximal base and the sheath tube has a small radius of curvature near the proximal end. Endoscopic tube shape in which a flexible anti-bending tube is placed around the proximal end of the sheath tube, and the proximal end of the anti-bending tube is attached to the proximal base. In the treatment instrument, a diameter-enlarged end portion that expands in a funnel shape or a flange shape is formed on each of the proximal end of the sheath tube and the proximal end of the break-off tube, and the expanded diameter end portion of the sheath tube and the expanded diameter of the break-off tube The end portion is overlapped, and the portion is fixed by being tightly sandwiched between the pressing and fixing member locked to the proximal side base and the proximal side base.
[0007]
In addition, if protrusions or irregularities are described on at least one of the pressing surfaces of the proximal side base and the pressing fixing member that are in contact with the surfaces of the expanded diameter ends of both tubes, the retaining strength is improved, and the expanded diameter of the sheath tube is increased. Even if a plate-like member made of a material harder than both the tubes is sandwiched between the end portion and the diameter-expanded end portion of the bend preventing tube, the retaining strength is improved.
[0008]
Moreover, if protrusions are formed on both the front and back surfaces of the plate-like member, the retaining strength is further improved.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described with reference to the drawings.
FIG. 2 shows the appearance of an endoscopic tube-like treatment instrument according to the first embodiment of the present invention. For example, from an tetrafluoroethylene resin tube having an outer diameter of about 2 mm and a length of about 1 to 2 m. The base end of the sheath tube 10 is connected to a proximal base 20 made of metal or plastic.
[0010]
Further, in order to prevent the sheath tube 10 from being bent with a small radius of curvature in the vicinity of the proximal end, for example, an anti-bending tube 11 made of a tetrafluoroethylene resin tube having an outer diameter of about 3 mm and a length of about several cm to 10 cm. Is disposed so as to surround the proximal end of the sheath tube 10, and the proximal end of the sheath tube 10 and the proximal end of the anti-break tube 11 are fixed to the proximal base 20 by the pressing fixing member 30.
[0011]
FIG. 1 shows a portion in which the proximal end of the sheath tube 10 and the proximal end of the break-off tube 11 are fixed to the proximal base 20, and the end of the sheath tube 10 and the end of the break-off tube 11 are The enlarged end portions 10a and 11a are formed in a funnel shape. The angle which the surface of each enlarged diameter end part 10a, 11a makes with respect to the axial direction of the sheath tube 10 is, for example, 45 °.
[0012]
A passage hole 25 communicating with the inside of the sheath tube 10 is formed in the proximal side base 20 so as to penetrate the axial position, and a cylindrical projection 23 formed at the distal end portion thereof is press-fitted into the proximal end portion of the sheath tube 10. ing.
[0013]
The expanded diameter end portion 10a of the sheath tube 10 and the expanded diameter end portion 11a of the anti-bending tube 11 are arranged so as to overlap each other, and the contact surface 21 with which the inner surface of the expanded diameter end portion 10a of the sheath tube 10 contacts is the proximal side. It is formed on the base 20. The abutment surface 21 is formed in a tapered shape having an angle of about 45 ° corresponding to the enlarged diameter end portion 10 a of the sheath tube 10.
[0014]
The male screw portion 24 formed on the outer periphery of the proximal side base 20 adjacent to the outer edge of the contact surface 21 is pressed in a cap shape for connecting and fixing the tubes 10 and 11 and the proximal side base 20 together. The female thread portion 34 of the fixing member 30 is screwed.
[0015]
A passage hole 33 sized to allow the folding tube 11 to pass loosely is formed at the axial position of the distal end portion of the pressing and fixing member 30, and the inner portion of the pressing and fixing member 30 has an angle of about 45 ° with respect to the axis. The tapered pressing surface 31 formed is formed so as to press the diameter-enlarged end portion 11a of the anti-bending tube 11 from the outer surface side toward the contact surface 21 of the proximal base 20.
[0016]
Therefore, when the sheath tube 10 and the anti-bending tube 11 are connected and fixed to the proximal base 20, the cylindrical projection 23 of the proximal base 20 is press-fitted into the proximal end portion of the sheath tube 10, and the diameter of the sheath tube 10 is expanded. The end portion 10 a is brought into contact with the contact surface 21, and the female screw portion 34 of the pressing and fixing member 30 is screwed into the male screw portion 24 of the proximal side base 20 to be tightened.
[0017]
Thereby, the enlarged diameter end portion 10a of the sheath tube 10 and the enlarged diameter end portion 11a of the break-off tube 11 are overlapped with each other between the contact surface 21 of the proximal side base 20 and the pressing surface 31 of the pressing fixing member 30. It is pinched in between.
[0018]
As a result, the sheath tube 10 and the folding stop tube 11 are simultaneously connected to the proximal side base 20 in a state in which the passage hole 25 of the proximal side base 20 and the inside of the sheath tube 10 communicate with each other in a straight line. In this way, the sheath tube 10 and the folding stop tube 11 are simultaneously connected and fixed to the proximal side base 20 simply by screwing the pressing and fixing member 30 onto the proximal side base 20.
[0019]
In addition, as shown in FIG. 1, the outer edge of the enlarged diameter end portion 10 a of the sheath tube 10 is formed larger than the outer edge of the enlarged diameter end portion 11 a of the anti-bending tube 11, whereby the enlarged diameter end portion 10 a of the sheath tube 10. Becomes difficult to come out, and when the sheath tube 10 is pulled from the front side, the connecting portion with the proximal side base 20 is difficult to come off.
[0020]
FIG. 3 shows the connecting portion between the sheath tube 10 and the anti-bending tube 11 and the proximal base 20 of the tubular treatment instrument for endoscope according to the second embodiment of the present invention, and the diameter of the sheath tube 10 is increased. Both the end portion 10a and the diameter-expanded end portion 11a of the anti-bending tube 11 are formed in a flange shape extending in a direction of approximately 90 ° with respect to the axis. Even if it does in this way, the effect similar to the above-mentioned 1st Example can be acquired.
[0021]
FIG. 4 shows the connecting portion between the sheath tube 10 and the anti-bending tube 11 and the proximal base 20 of the tubular treatment instrument for endoscope according to the third embodiment of the present invention, and the diameter of the sheath tube 10 is increased. A conical dish made of a plate-like material harder than the tubes 10 and 11, such as a metal such as a stainless steel plate or a hard plastic, between the end portion 10a and the diameter-expanded end portion 11a of the anti-break tube 11 The washer 12 is sandwiched. By doing in this way, both the enlarged diameter end parts 10a and 11a of both the tubes 10 and 11 become difficult to come out, and connection strength improves.
[0022]
Further, by using a material having a large friction coefficient as compared with the material of the sheath tube 10 and the bend prevention tube 11 as the washer 12, the enlarged diameter end portions 10a and 11a are more difficult to come out, and the connection strength is improved. As shown in FIG. 5 alone, the protrusions 12 a may be formed on both the front and back surfaces of the washer 12.
[0023]
FIG. 6 shows a connecting portion between the sheath tube 10 and the folding prevention tube 11 and the proximal side base 20 of the tubular treatment instrument for endoscope according to the fourth embodiment of the present invention. Small irregularities are formed on the contact surface 21 and the pressing surface 31 of the pressing fixing member 30.
[0024]
Even if it does in this way, it will become difficult for the enlarged diameter end parts 10a and 11a of both the tubes 10 and 11 to come out, and connection strength will improve. Further, as in the fifth and sixth embodiments shown in FIGS. 7 and 8, radial or circumferential protrusions 22 and 32 may be formed on the contact surface 21 and the pressing surface 31.
[0025]
【The invention's effect】
According to the present invention, the expanded end of the sheath tube and the bent tube are formed at the proximal end of the sheath tube and the proximal end of the folded tube, respectively, so that the expanded diameter end of the sheath tube and the folded tube Overlapping the enlarged diameter end, and the part is tightly sandwiched and fixed between the press fixing member locked to the hand side base and the hand side base, so that the sheath tube and the anti-break tube are pressed together. Since it can be connected and fixed to the hand side base by the fixing member, it can be easily and reliably assembled with the minimum number of parts, can be manufactured at a very low cost, and waste is reduced even if it is disposable.
[Brief description of the drawings]
FIG. 1 is a side cross-sectional view of a connecting and fixing portion between a tube and a proximal side base of an endoscope tube-like treatment instrument according to a first embodiment of the present invention.
FIG. 2 is an external view of a tubular treatment tool for an endoscope according to a first embodiment of the present invention.
FIG. 3 is a side cross-sectional view of a connecting and fixing portion between a tube and a proximal side base of an endoscope tube-like treatment instrument according to a second embodiment of the present invention.
FIG. 4 is a side sectional view of a connecting and fixing portion between a tube and a proximal side base of an endoscope tube-shaped treatment tool according to a third embodiment of the present invention.
FIG. 5 is a side sectional view showing a modification of a dish-shaped washer of an endoscope tube-shaped treatment instrument according to a third embodiment of the present invention alone.
FIG. 6 is a side cross-sectional view of a connecting and fixing portion between a tube and a proximal side base of an endoscope tube-like treatment instrument according to a fourth embodiment of the present invention.
FIG. 7 is a side cross-sectional view of a connecting and fixing portion between a tube and a proximal side base of an endoscope tube-like treatment instrument according to a fifth embodiment of the present invention.
FIG. 8 is a side sectional view of a connecting and fixing portion between a tube and a proximal side base of an endoscope tube-like treatment instrument according to a sixth embodiment of the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 Sheath tube 10a Expanded end part 11 Bending tube 11a Expanded end part 12 Washer 12a Protrusion 20 Hand side base 21 Contact surface 22 Protrusion 24 Male screw part 30 Press fixing member 31 Press surface 32 Protrusion 34 Female thread part

Claims (4)

A base end of a sheath tube made of a flexible resin tube is connected to the proximal base, and a flexible anti-fold tube for suppressing the sheath tube from bending with a small radius of curvature near the base end is provided. In the tubular treatment instrument for an endoscope, which is disposed so as to surround the proximal end of the sheath tube and the proximal end of the folding tube is attached to the proximal base,
The folding tube is loosely fitted to the sheath tube with a radial gap, and 45 ° to 90 ° with respect to the axis at each of the proximal end of the sheath tube and the proximal end of the folding tube. ° angle to form a funnel-shaped or flange-like on the flared enlarged end portion of overlapped the upper SL enlarged end portion of the sheath tube and the bending prevention diameter end of the tube, that part, the An endoscope characterized by being tightly sandwiched and fixed between both of the pressing and fixing member locked to the proximal side base and the proximal side base between the surfaces formed in parallel with the enlarged end portions of the two tubes. Tubular treatment device. The tube-shaped treatment instrument for an endoscope according to claim 1, wherein a projection or an unevenness is described on at least one pressing surface of the proximal side base and the pressing fixing member that are in contact with the surfaces of the enlarged diameter end portions of both the tubes. . The endoscope according to claim 1 or 2, wherein a plate-like member made of a material harder than the two tubes is sandwiched between the expanded end portion of the sheath tube and the expanded end portion of the folding tube. Tubular treatment device. The tube-shaped treatment tool for an endoscope according to claim 3, wherein protrusions are formed on both front and back surfaces of the plate-like member.

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