JP3014092U - Fixture for medical catheter - Google Patents

Abstract

(57) [Abstract] [Purpose] It can be used for the curved part of the tube body of various medical catheters, and the elastic flange can be located near the position just below the connector part. (EN) Provided is a fixture which can be manufactured without having to take a complicated shape even if the shape of the cross section of the main body is far from a perfect circle. A main body 5 made of a rigid material is provided, which has an axial hole slidably inserted into the tube main body 2 and an annular groove into which a through hole of an elastic flange 6 is elastically press-fitted is formed on an outer peripheral surface. . An annular recess is formed in the inner peripheral surface of the main body 5 having an axial hole, and an elastic locking ring 12 having a notch 11 divided in the circumferential direction is housed in the annular recess. A tightening screw member 13 for tightening the tube body by pressing the ring from the side opposite to the cutout portion to reduce the diameter of the elastic locking ring with the inner peripheral surface of the annular recess is screwed onto the outer peripheral surface of the body 5. are doing.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 This invention is a fixture used in various medical catheters having a flexible tube body, and more specifically, it is provided by being inserted so as to be movable and adjustable in the axial direction of the tube body, and via an elastic flange. The present invention relates to a fixture that prevents a catheter from moving from a predetermined position.

[0002]

[Prior art]

 As a conventional fixture of this type, for example, the one described in Japanese Utility Model Laid-Open No. 4-71913 proposed by the applicant for a tracheostomy tube is known. It has an axial hole that is formed in a cross-sectional shape that is almost the same as the cross-section of the tube body and speaking tube, and is slidably fitted into them. Is formed into a circular groove, and a portion other than the circular groove is circumferentially divided into a plurality of claw portions that are elastically deformable in the radial direction, and the notch of the tip opening is formed between the claw portions. A first tube body having a groove formed therein, and a portion of the axial hole into which the speaking tube is fitted is arranged, and an axial hole slidably fitted into the tube body and the speaking tube. And a second cylinder for tightening the tube body by elastically displacing the claw portion of the first cylinder inward in the radial direction by pushing the axial hole into the claw portion of the first cylinder. Is.

[0003]

[Problems to be solved by the device]

 By the way, as described above, the conventional fixture composed of the first tubular body 51 and the second tubular body 52 has the axial direction when it is fitted and fixed in the tube body 53 as shown in FIG. 7 (A). Since the length (height) La tends to be too long, it cannot be used for the curved portion of the tube body 53. Further, since the annular recessed groove 56 for elastically press-fitting the through hole 55 of the elastic flange 54 is formed on the outer peripheral surface of the lower end portion of the first tubular body 51, it is directly below the connector portion (funnel portion) 57 having a large diameter. The elastic flange 54 could not be located at a close position, and the movement adjustment range was narrow. Further, there are various problems in that the farther the cross-sectional shape of the tube body 53 is from the perfect circle, the more complicated the first cylindrical body 51 must be.

Therefore, the present invention solves the above-mentioned conventional problems and can be used for the curved portion of the tube body, and the elastic flange can be positioned near the position directly below the connector portion. It is an object of the present invention to provide a fixture that can be manufactured without requiring a complicated shape even if the cross-sectional shape of the tube body is far from a perfect circle.

[0005]

[Means for Solving the Problems]

 In order to achieve the above object, the invention of claim 1 has an axial hole slidably inserted in the tube body, and an annular groove into which the through hole of the elastic flange is elastically press-fitted is formed on the outer peripheral surface. An elastic locking ring having a main body made of a rigid material, an annular recess is formed on the inner peripheral surface of the main body having an axial hole, and the annular recess has a notch cut in the circumferential direction. The tightening screw member that accommodates the elastic locking ring and presses the elastic locking ring from the side opposite to the cutout portion to reduce the diameter of the elastic locking ring between the elastic locking ring and the inner peripheral surface of the annular recess, and tightens the tube main body. Is screwed onto the outer peripheral surface of.

According to a second aspect of the present invention, the tube body has an axial hole slidably fitted therein, and an annular flange portion is provided on an inner surface near the axial hole and an elastic flange through hole is provided on an outer peripheral surface thereof. The first rigid member is provided so that it can be inserted through a part of the cutout portion, and an axial hole that is slidably inserted into the tube body, and the axial hole has the first rigidity. A second rigid member fixed to the first rigid member by contacting the annular flange portion so as to correspond to the axial hole of the member, and forming an annular recess on the inner peripheral surface side of the annular flange portion; The second rigid member or the first rigid member is provided with a screw mounting member that fits in a notched part of the elastic flange, and the elastic locking ring has a notched part that is divided in the circumferential direction in the annular recess. The elastic locking ring from the side opposite the cutout. A tightening screw member for tightening the tube main body by pressing and elastically contracting the elastic locking ring with the inner peripheral surface of the annular recess is screwed onto the outer peripheral surface of the screw mounting member.

[0007]

[Action]

 With the above configuration, the axial length when fitted and fixed in the tube body can be made shorter than the conventional one. Therefore, it can be used for a curved part of the tube body sufficiently, and the elastic flange can be positioned near the connector part of the tube body, and its movement adjustment range is wider than the conventional one. Moreover, even if the shape of the cross section of the tube body is far from the true circle, it is possible to deal with it without making it complicated.

[0008]

【Example】

 1 to 3 show a first embodiment of the present invention, FIG. 1 is a partially cutaway perspective view, and FIG. 2 is a vertical sectional front view of a main part taken along line II-II of FIG. Reference numeral 1 denotes a fixture, which comprises a flat cylindrical body 5 having upper and lower end openings having an axial hole 3 slidably fitted in a flexible tube body 2 of various medical catheters. The main body 5 is entirely made of rigid synthetic resin, and an annular groove 8 into which the through hole 7 of the elastic flange 6 is elastically press fit is formed on the outer peripheral surface thereof. The elastic flange 6 is made of rubber or the like and has the same structure as the conventional one. An annular recess 10 is formed on the inner peripheral surface of the main body 5 having the axial hole 3, and an elastic locking ring 12 having a notch 11 divided in the circumferential direction is accommodated therein. Reference numeral 13 is a tightening screw member screwed to the outer peripheral surface of the main body 5 so that its tip end faces the elastic locking ring 12 in the annular recess 10, and the elastic locking ring 12 is rotated by rotating in the screwing direction. The tube body 2 can be tightened by pressing from the side opposite to the notch portion 11 with the tip portion to reduce the diameter of the elastic locking ring 12 with the inner peripheral surface of the annular recess 10.

The elastic locking ring 12 is housed in the annular recess 10 of the main body 5 by utilizing its elastic force through the axial hole 3 before being fitted into the tube main body 2. This housing operation may be performed before or after elastically press-fitting the elastic flange 6 into the annular groove 8. Elastic locking ring 1
After housing 2, the axial hole 3 of the body 5 is fitted into the tube body 2.

The action of fixing the elastic flange 6 to an arbitrary position of the tube body 2 by using the fixture 1 in which the axial hole 3 of the body 5 is fitted in the tube body 2 as described above will be described below. . As shown in FIG. 3A, in the state before the tightening screw member 13 is screwed in, the elastic locking ring 12 has the notch 11 expanded, and the outer peripheral surface thereof elastically contacts the inner peripheral surface of the annular recess 10. are doing. When the tightening screw member 13 is rotated in the screwing direction from this state, its front end projects into the annular recess 10 and presses the elastic locking ring 12 from the side opposite to the notch 11, and gradually the elastic locking ring 12 is pressed. Is reduced in diameter with the inner peripheral surface of the annular recess 10. When the inner peripheral surface of the elastic locking ring 12 pushed by the tip of the tightening screw member 13 comes into contact with the outer peripheral surface of the tube body 2, the notch 11 is filled up as shown in FIG. 3 (B). Both ends of the elastic locking ring come to abut. As a result, the tube body 2 is tightened so as to be wrapped with the elastic locking ring 12, and the elastic flange 6 is fixed to this position via the fixture 1.

On the other hand, in order to release the fixation, the tightening screw member 13 is rotated in the direction opposite to the screwing direction to release the pressing force on the elastic locking ring 12. As a result, the elastic locking ring 12 is elastically restored so that the notch 11 is formed and returns to the original state shown in FIG. 3 (A), and the elastic flange 6 can slide on the tube body 2 together with the fixture 1. Becomes

In the fixture 1 having the above-mentioned structure, when the fixture 1 is fitted and fixed in the tube body 2 as compared with the conventional fixture of FIG. 7 (A) in FIG. 7 (B). The length (height) Lb in the axial direction is shortened to about 1/3 in the drawing, so that it can be sufficiently used for the curved portion of the tube body 2. Further, as is apparent from the drawing, the elastic flange 6 can be located at a position close to directly below the connector portion 15, and the range of movement adjustment is wider than that of the conventional one. Moreover, even if the cross-sectional shape of the tube body 2 is far from the perfect circle, it is possible to deal with it without making it complicated.

4 to 6 show a second embodiment of the present invention, FIG. 4 is a partially cutaway plan view, and FIG. 5 is a left half partly cutaway front view. Reference numeral 21 denotes a fixture, which includes a disc-shaped first rigid member 22 and a second rigid member 23 which are made of a synthetic resin having rigidity as a whole, as shown in FIG. As shown in FIG. 6 (B), the first rigid member 22 has an axial hole 25 slidably fitted in the tube body 2, and one axially divided portion is formed on the inner surface near the axial hole. An annular flange portion 27 having a cutout portion 26 is provided so as to extend substantially concentrically with the same thickness as the elastic flange 28. The cutout portion 26 of the annular flange portion 27 has substantially the same size (width) as the cutout portion 29a of the through hole portion 29 of the elastic flange 28 inserted into the outer peripheral surface of the flange portion. Reference numeral 30 is a hole for a retaining pin formed along the outer circumference of the first rigid member 22.

The second rigid member 23 has an axial hole 32 of the same size as the axial hole 25 of the first rigid member 22 slidably fitted in the tube body 2 as shown in FIG. 6C. And a screw mounting member 34 having a size that fits into the notched portion 29a of the elastic flange 28 on the inner surface. A tightening screw member 35 is screwed onto the outer peripheral surface of the screw mounting member 34 so as to pass through the first rigid member 22 in the radial direction. The reference numeral 37 designates holes for retaining pins which are formed along the outer circumference of the second rigid member 23. FIG. 6 (D) shows an elastic locking ring 39 having a notch 38 that is divided in the circumferential direction. In this elastic locking ring 39, the second rigid member 23 is the first rigid member 22. Both axial holes 3 and 32 are brought into contact with the annular flange portion 27 of the above, and both stop pin holes 30 and 37 and a stop pin hole 41 provided in the elastic flange 28 shown in FIG. 6 (A). When fixed via a stop pin 42 inserted between them, it is housed in an annular recess 43 formed on the inner peripheral surface side of the annular flange portion 27.

With the fixture 21 as described above, the same operation as that of the fixture 1 of the first embodiment can be expected. That is, when the tightening screw member 35 is rotated in the screwing direction from FIG. 4 which shows the state before the tightening screw member 35 is screwed in, the tip end of the tightening screw member 35 presses the elastic locking ring 39 to reduce the diameter of the tube body. Tighten 2 by wrapping it with elastic locking ring 39. This secures the elastic flange 28 in that position. On the other hand, when the tightening screw member 35 is rotated in the direction opposite to the screwing direction, the pressing force on the elastic locking ring 39 is released. As a result, the elastic locking ring 39 is elastically restored to release the fixation, and the elastic flange 28 becomes slidable on the tube body 2. Further, in the case of this fixing tool 21, the length in the axial direction is further shorter than that of the fixing tool 1, so the action described in paragraph number 0012 can be expected.

The materials of the main body 5, the first and second rigid members 22 and 23 shown in each of the above embodiments are not necessarily synthetic resins as long as they are rigid. In addition, the screw mounting member 34 may be provided on the first rigid member 22 instead of the second rigid member 23. In this invention, the detailed construction is variously modified without changing the basic technical idea. It can be modified or modified.

[0017]

[Effect of device]

 Since the inventions of claims 1 and 2 are configured as described above, they can be used in a curved portion of the tube body, and the elastic flange can be located near the position directly below the connector portion. In addition, even if the cross-sectional shape of the tube body is far from a perfect circle, it can be manufactured without having to take a complicated shape, and it is possible to solve all the problems that could not be solved by conventional fixtures. It has an excellent effect that it can be done.

[Brief description of drawings]

FIG. 1 is a partially cutaway perspective view showing a first embodiment of the present invention.

FIG. 2 is a vertical sectional front view of a main part taken along line II-II in FIG.

3 (A) and 3 (B) are explanatory views of the operation.

FIG. 4 is a partially cutaway plan view showing a second embodiment of the present invention.

FIG. 5 is a front view of the left half section of the above.

6A and 6B are exploded views of constituent members, FIG. 6A is a plan view of an elastic flange, FIG. 6B is a plan view of a first rigid member, and FIG. 6C is a bottom view of a second rigid member. D) is a plan view of the elastic locking ring.

FIG. 7 is a view for explaining the operational difference between the conventional fixture and the fixture of the first embodiment of the present invention.

[Explanation of symbols]

1 Fixture 2 Tube body 3 Axial hole 5 Body 6 Elastic flange 7 Through hole 8 Annular groove 10 Annular recess 11 Notch 12 Elastic locking ring 13 Tightening screw member 21 Fixture 22 First rigid member 23 Second Rigid member 25 Axial hole 26 Notch 27 Annular flange 28 Elastic flange 29 Through hole 32 Axial hole 34 Screw mounting member 35 Tightening screw member 38 Notch 39 Elastic locking ring 42 Locking pin 43 Annular recess

Claims (2)

[Scope of utility model registration request] 1. A fixing for fixing an elastic flange of a medical catheter having a flexible tube body to the tube body, the elastic flange being inserted into the tube body through a through hole formed in the central portion thereof. A tool having a body made of a rigid material having an axial hole slidably inserted into the tube body and having an annular groove into which a through hole of the elastic flange is elastically press-fitted is formed on an outer peripheral surface, An annular recess is formed on the inner peripheral surface of the main body having an axial hole, and an elastic locking ring having a notch cut in the circumferential direction is housed in the annular recess. It is characterized in that a tightening screw member for tightening the tube main body is screwed onto the outer peripheral surface of the main body by pressing from the side opposite to the notch portion to reduce the diameter of the elastic locking ring with the inner peripheral surface of the annular recess. To Ryoyo fixture for a catheter. 2. An elasticity of a medical catheter having a flexible tube body, which is inserted into a central portion of the tube body through a cutout portion so that a part thereof communicates with the outside. A fixture for fixing a flange to a tube body, which has an axial hole slidably fitted in the tube body, and an annular flange portion on an inner surface near the axial hole and an outer peripheral surface thereof. A first rigid member in which the through-hole portion of the elastic flange is provided so as to be insertable through the cutout portion, and an axial hole slidably fitted in the tube body, The axial hole is in contact with the annular flange portion so as to correspond to the axial hole of the first rigid member, and an annular recess is formed on the inner peripheral surface side of the annular flange portion to be fixed to the first rigid member. And the second rigid member The second rigid member or the first rigid member is provided with a screw mounting member that fits into the cutout portion of the elastic flange, and the annular recess has a cutout portion that is divided in the circumferential direction. A tube for tightening the tube body by accommodating the elastic locking ring and pressing the elastic locking ring from the side opposite to the cutout portion to reduce the diameter of the elastic locking ring with the inner peripheral surface of the annular recess. A fixture for a medical catheter, wherein an attached screw member is screwed onto the outer peripheral surface of the screw mounting member.