JP2011182939A - Conduit connection device for medical device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent breakage of a connection port attachment member and an inner conduit member when an excessive load is applied on a member of an adapter connecting port such as a forceps port. <P>SOLUTION: In a conduit connection device for an endoscope for connecting the adapter for sending of a solution or the like to the forceps port 12K, a rectangular part 12d having a periphery of a substantially regular tetragon is formed below a forceps port body 12, and an engagement hole 15d which has an inner periphery of a substantially regular tetragon and is configured to make the rectangular part 12d engage is formed below an attachment hole 15 on one resin holder 14. Then, a torque limiter mechanism by which the forceps port body 12 runs idle at a prescribed torque value or higher is configured by placing an elastic rubber 16 between the rectangular part 12d and the engagement hole 15d. The constitution in which elasticity is imparted to a side of the forceps port body or a side of the holder without providing the elastic rubber 16 can be achieved. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a configuration of a conduit connection device for connecting an external instrument (adapter) to a conduit connection device of a medical device, particularly to an endoscope internal conduit for liquid feeding and the like.

  FIG. 9 shows a configuration of a forceps opening portion of a conventional endoscope operation unit similar to those in Patent Documents 1 and 2 below, and a treatment such as forceps as shown in FIG. A treatment instrument insertion channel 1 is provided for inserting the instrument into the body cavity from the distal end portion or for feeding a liquid into the body cavity, and a forceps port 2K (forceps mouth body 2 as an introduction port of the treatment instrument insertion channel 1) ) Is provided in the operation unit 3.

  That is, a female screw portion 4a is formed below the circular mounting hole of the holder (resin mounting portion) 4 at the top of the operation portion 3, and the forceps port body (made of metal) 2 is formed in the female screw portion 4a. By screwing the male screw portion 2a formed on the lower side, the forceps port body 2 is attached and fixed to the operation portion 3 in a state where the forceps port body 2 is connected to the end tube of the treatment instrument insertion channel 1. Further, in this mounting and fixing, the watertight state of the forceps port member mounting portion can be maintained by using an adhesive or the O-ring 5 disposed in the side groove of the forceps port body 2.

  Then, for example, a liquid supply tube 7 as a liquid supply adapter (external instrument) is connected to the forceps port 2K by a connector 8. The connector 8 is composed of, for example, a luer lock type connector, and the internal thread portion 8a is screwed to the collar-like convex portion of the forceps port 2K to connect the liquid feeding tube 7 to the forceps port 2K. This makes it possible to send liquids.

JP 7-31586 A JP 7-194523 A

  However, when liquid feeding is performed with a conventional endoscope, the connector 8 is rotated and connected to the forceps port 2K, and it is necessary to firmly fix it to maintain a watertight state. Depending on the degree of application, there is a possibility that the forceps port 2K and the main body 2 thereof are overloaded in the rotational direction, and the holder 4 portion and the conduit parts of the treatment instrument insertion channel 1 may be damaged.

  In the endoscope, in addition to the above-described forceps port 2K, there are a water jet port and the like for performing liquid feeding and the like, and such a liquid feeding port has the same problem when connecting an adapter.

  The present invention has been made in view of the above problems, and its purpose is to damage the connection port mounting member and the internal conduit member even if an adapter connection port member such as a forceps port is overloaded. An object of the present invention is to provide a conduit connection device for a medical device.

In order to achieve the above object, the invention according to claim 1 is a medical device in which a connection body provided with a connection port for connecting an adapter is attached to an attachment hole, and the adapter is attached to and detached from a medical device internal conduit. In this pipe connection device, a torque limiter mechanism is provided which allows the connection portion main body attached to the attachment hole to rotate at a predetermined torque value.
In the torque limiter mechanism according to the invention of claim 2, the shape of the outer periphery of the connection portion main body and the inner periphery of the attachment hole are substantially the same (so-called key engagement), and the connection portion main body and the attachment hole are At least one of the members is configured as an elastic member.
The torque limiter mechanism according to the invention of claim 3 is configured such that the outer periphery of the connection portion body and the inner periphery of the attachment hole have substantially the same shape, and an elastic rubber is disposed between the connection portion body and the attachment hole. It is characterized by becoming.
The invention of claim 4 is characterized in that the shape of the outer periphery of the connecting portion main body and the inner periphery of the mounting hole is a quadrilateral or more polygon.
According to a fifth aspect of the present invention, there is provided an adjusting member that contacts the outer periphery of the connecting portion main body from the mounting hole member and adjusts the torque of the torque limiter mechanism.
The invention of claim 6 is characterized in that the torque limiter mechanism is set such that rotation is allowed at a torque value of 50 N · cm to 400 N · cm (50 N · cm ≦ set value ≦ 400 N · cm). .

  According to the configuration of the present invention, when the outer periphery of the connecting portion main body is key-engaged with the inner periphery of the mounting hole and a load of, for example, a torque value of 50 N · cm or more is applied to the connecting portion main body, the connection is made to release the load. The part main body is idled at the attachment hole, and this prevents the peripheral members of the connection port arrangement from being damaged.

  According to the pipe connection device of the medical device of the present invention, even when an overload is applied to a member of a connection port such as a forceps port or a water jet port when an adapter for feeding liquid is attached or connected, the connection port There is an effect that the attachment portion and the internal pipe line parts are not damaged and the quality can be improved.

It is sectional drawing which shows the structure of the pipe-line connection apparatus (forceps opening | mouth part) of the medical device (endoscope) which concerns on 1st Example of this invention. It is a perspective view which shows the structure of the endoscope operation part to which the pipe-line connection apparatus of 1st Example is applied. It is a perspective view which shows the components which comprise the pipe-line connection apparatus of 1st Example. The structure of the attachment part of the connection part main body of an Example is shown, FIG. (A) is sectional drawing of 1st Example, FIG. (B) is sectional drawing of 2nd Example. It is a figure which shows the other example of the shape of the outer periphery of the connection part main body of an Example, and the inner periphery of an attachment hole. It is sectional drawing which shows the structure of the attachment part of the pipe-line connection apparatus of 3rd Example. It is sectional drawing which shows the structure of the pipe-line connection apparatus of 4th Example. It is a perspective view which shows the other connection port of the endoscope to which the pipe-line connection apparatus of an Example is applied. It is sectional drawing which shows the structure of the pipe line connection apparatus of the conventional endoscope.

FIG. 1 to FIG. 4 show an endoscope conduit connection device according to a first embodiment of the present invention. This first embodiment is an endoscope operation as shown in FIG. This is applied to a forceps port 12 </ b> K provided in the portion 10.
In FIG. 1, a treatment instrument insertion channel 1 of the operation unit 10 is disposed up to the distal end for inserting a treatment instrument such as forceps into the body cavity from the distal end, and for feeding liquid into the body cavity. A forceps port 12 </ b> K as an introduction port for the treatment instrument insertion channel 1 is provided in the operation unit 10.

  The forceps port 12K is formed as a conduit introduction port in a metal forceps port main body (connector body) 12, and the forceps port 12K has a collar-like annular convex portion 13 for connecting and fixing an adapter. On the other hand, an attachment hole 15 for inserting and attaching the forceps port main body 12 is formed in the resin holder 14 as the attachment portion of the operation portion 10. As shown in FIGS. 3A and 4, the upper (tip side) outer periphery of the forceps port body 12 is circular, but below that is a rectangular portion 12 d whose outer periphery is a substantially square. The upper inner circumference of the mounting hole 15 of one holder 14 is a circular hole, but the inner circumference is formed into a substantially regular square below the engagement hole 15 to engage the square portion 12d. (Square hole: key engagement hole) 15d slightly larger than the square portion 12d is formed.

  In the first embodiment, a regular square hollow elastic rubber 16 that fits the outer peripheral shape is attached to the outer periphery of the rectangular portion 12d. The elastic rubber 16 may be a simple circular hollow. In the forceps port body 12, an O-ring 5 for maintaining watertightness inside the endoscope is disposed on the outer periphery (annular groove) such as above the rectangular portion 12d.

  In addition, a fixing ring 18 is provided to fix the forceps port body 12 inserted into the mounting hole 15 in the axial direction. The fixing ring 18 has a male screw portion 18a formed on the outer periphery thereof, and is attached to the mounting hole. As a result, the forceps port body 12 can be prevented from coming off.

  The first embodiment has the above-described configuration, and the torque limiter mechanism of the first embodiment includes a forceps port body 12 having an outer periphery that is substantially square and an elastic rubber 16 fitted therein, and an attachment hole having an inner periphery that is substantially square. 15 is realized by key engagement, and the torque (limit value) of rotation allowance (start) of this torque limiter mechanism is set to a value of about 100 N · cm, for example.

  Then, as described in FIG. 9, the adapter 8 is connected to the forceps port 12K while turning, for example, the connector 8 of the liquid feeding tube 7 or the like. When a torque of about cm or more is applied, the elastic rubber 16 is deformed, and in some cases, some deformation of the engagement hole 15d is also applied, so that the rectangular portion 12d rotates in the engagement hole 15d, and the forceps opening The main body 12 idles in the mounting hole 15. As a result, the rotational load applied to the forceps port main body 12 is released, and it is possible to prevent the holder 14 and the like from being damaged.

  The rotation allowable torque of such a torque limiter mechanism is preferably set to a value of 50 N · cm to 400 N · cm. That is, normally, the torque applied when the adapter (connector) for feeding a liquid is attached or detached is 20 to 30 N · cm, and if it is less than 50 N · cm, the forceps port body 12 is idled although it is not an abnormal operation. This is because the user feels uncomfortable, and if it is larger than 400 N · cm, the holder 14 and the end tube of the treatment instrument insertion channel 1 are likely to be broken.

  FIG. 4B shows the configuration of the second embodiment. This second embodiment uses the elasticity of the holder without the elastic rubber of the first embodiment. That is, also in the second embodiment, a square portion 20d having a substantially square outer periphery is formed below the metal forceps port main body 20, and the mounting hole 22 of the holder 21 made of resin and having elasticity is also provided below the In addition, an engagement hole (fitting hole) 22d is formed in which the inner periphery is a substantially square and the rectangular portion 12d is fitted with a little play. In the second embodiment, a predetermined rotation allowable torque value in the range of 50 N · cm to 400 N · cm is set by the elasticity of the resinous material of the holder 21.

  Also in the second embodiment, when a force greater than a predetermined torque value is applied during operation, the square portion 20d rotates due to the elastic deformation of the engagement hole 22d of the holder 21, and the forceps port body 20 is attached to the attachment hole 22. It will idle in the.

  In the second embodiment, an adjustment member for adjusting the torque of the torque limiter mechanism is provided. As shown in FIG. 4B, the screw hole extends from the outer periphery of the holder 21 to the engagement hole 22d. 21e is provided, and a torque adjusting screw 24 is screwed into the screw hole 21e. According to such a torque adjustment screw 24, the tip thereof is in contact with the side surface portion of the square portion 20d of the forceps port main body 20, and this contact state (position of adjustment screw, strength of contact) is changed. Thus, the rotation allowable torque can be adjusted.

  In the second embodiment, the elasticity of the holder 21 side member is used. However, a metal member is disposed on the holder 21 (mounting hole 22) side and a resin member having elasticity on the forceps port body 20 side is used. Thus, a predetermined rotation allowable torque of the torque limiter mechanism may be set, or both the holder 21 side member and the forceps port main body 20 side member may be configured to have elasticity.

  FIG. 5 shows other shapes of the outer periphery of the forceps port main body 12 as the torque limiter mechanism and the inner periphery (key engagement) of the mounting holes 15 and 22. In the above-described embodiment, a regular square shape is shown. However, as shown in FIG. 5A, the outer periphery of the forceps port main body 2 and the inner periphery of the attachment holes 15 and 22 may be formed by straightly cutting the corners of a regular square. It may be a square. Further, as shown in FIG. 5B, a part of a circle can be cut into a straight line.

  FIG. 6 shows the configuration of the third embodiment. This third embodiment is provided with an engagement hole 27d whose inner periphery below the mounting hole 27 of the resin holder 26 is circular. A circular portion 28d having a circular outer periphery is formed below one metal forceps port main body 28, and a slightly thicker elastic rubber 29 is disposed between the engagement hole 27d and the circular portion 28d.

  A predetermined rotation allowable torque value in a range of 50 N · cm to 400 N · cm is set by friction and elastic deformation of both the engagement hole 27 d and the circular portion 28 d of the elastic rubber 29. Also in the third embodiment, the holder 26 and the like are prevented from being damaged by the idle rotation of the forceps port main body 28.

  In the torque limiter mechanisms of the first to third embodiments, the rotation allowable torque values in the left and right rotation directions are the same. Usually, the necessary torque value to be applied to the connector 8 (FIG. 9) is the same at the time of fixing and at the time of releasing, so this mode is sufficient. That is, the torque value in the rotational direction when the connector 8 is fixed is a low torque value, and the torque value in the rotational direction when the connector 8 is released is a high torque value.

  FIG. 7 shows the configuration of the fourth embodiment in which the allowable rotation torque value is changed between right and left. For example, the rotation direction (low torque) at the time of fixing is set to a torque value of 50 N · cm or more and 400 N · cm or less. The release rotation direction (high torque) is set to a torque value greater than 400 N · cm and less than or equal to 1000 N · cm (400 N · cm <set value at release ≦ 1000 N · cm). That is, as shown in FIG. 7, in the key combination, the apex (Δ) on the rotation direction side when fixed is slightly spaced, and the apex (◯) on the rotation direction side when released is in contact. Good.

  According to the configuration of the fourth embodiment as described above, even if a situation occurs in which the connector 8 is accidentally strongly engaged, even if a sufficiently large torque is applied when the connector 8 is rotated in the rotational direction at the time of release. Since the forceps port body 12 is not idle, the connector 8 can be disengaged, so that the reliability when the connector is released can be further improved.

In the above-described embodiment, an example of a portion where the forceps port 2K is disposed has been described. However, the present invention can be applied to other connection ports that perform liquid feeding or the like in an endoscope.
FIG. 8 shows another example of an endoscope. In FIG. 8, a water jet port (connection port) 31 and the like are provided at the rear end portion of the operation unit 10. The water jet port 31 is used for, for example, spraying or washing the staining liquid on the observation site, and the present invention can be applied to the connection member of the water jet port 31.

DESCRIPTION OF SYMBOLS 1 ... Treatment instrument penetration channel, 2,12 ... Forceps mouth main body 4, 14, 21, 26 ... Holder (attachment part),
2K, 12K ... forceps opening, 12d, 20d ... square part,
15, 22, 27 ... mounting holes, 15d, 22d, 27d ... engaging holes,
16, 29 ... elastic rubber, 24 ... adjusting screw,
28d ... circular part, 31 ... water jet port.

Claims (6)

In the conduit connection device of the medical device in which the connection body provided with the connection port for connecting the adapter is attached to the attachment hole, and the adapter is attached to and detached from the medical device conduit.
A conduit connection device for a medical device, characterized in that a torque limiter mechanism is provided that allows the connection portion main body attached to the attachment hole to rotate at a predetermined torque value.   The torque limiter mechanism is configured such that the outer periphery of the connection portion main body and the inner periphery of the attachment hole have substantially the same shape, and at least one of the connection portion main body and the member of the attachment hole is configured as an elastic member. The medical device pipe connection device according to claim 1.   The torque limiter mechanism is characterized in that the shape of the outer periphery of the connection portion main body and the inner periphery of the attachment hole are substantially the same, and an elastic rubber is disposed between the connection portion main body and the attachment hole. Item 1. A medical device pipe connection device according to Item 1.   The conduit connection device for a medical device according to claim 2 or 3, wherein a shape of an outer periphery of the connection portion main body and an inner periphery of the attachment hole is a quadrilateral or more polygon.   The medical device conduit according to any one of claims 1 to 4, further comprising an adjustment member that abuts the outer periphery of the connection portion main body from the mounting hole member and adjusts the torque of the torque limiter mechanism. Connected device.   6. The conduit connection device for a medical device according to claim 1, wherein the torque limiter mechanism is set so that rotation is allowed at a torque value of 50 N · cm to 400 N · cm.

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