JP4866631B2 - Rotating connector - Google Patents

Description

  The present invention relates to a medical rotary connector for connecting a drug solution tube, a blood tube, a tracheal tube inserted in a human body and an external circuit by a conical joint.

In many cases, medical connectors are required to have functions contradicting the fact that secure connection and easy attachment / detachment are possible when connecting pipe lines or between a pipe line and a member. One means of satisfying this requirement is a conical joint. Many conical joints are defined by various standards such as JIS and ISO that must be applied to medical products such as artificial respiration circuits, circuit components, and liquid syringes. ing.
Another demand for the medical connector is that the connecting members can rotate while securing the joining. The medical rotary connector satisfies this demand. By freely rotating the joining member, it is possible to avoid inadvertent blockage or separation of a pipe line or the like, or patient pain.
Medical rotary connectors with various conical joints that meet these demands and demands are currently used. However, the conventional rotary connector has a problem that it is difficult to remove it due to its pivotability.
For example, a conical junction between a tracheal tube and an external circuit includes a male terminal portion attached to the end of the tracheal tube and a female terminal portion attached to the end of the ventilator circuit. Is connected to an internationally standardized conical connection state. In this case, a rotating connector called a swivel connector employing a rotating mechanism is used in order to reduce stress applied to a patient who has been intubated with a tracheal tube due to twisting of a respiratory circuit or the like.

  A longitudinal sectional view of a conventional rotary connector is shown in FIG. The rotary connector includes a male terminal portion 21 and a female terminal portion 22, and the female terminal portion 22 includes an inner cylindrical body 23 and an outer cylindrical body 24 connected to the male terminal portion 21. The outer cylindrical body 24 is relatively rotatable. The male terminal portion 21 is attached to the tracheal tube 25, the female terminal portion 22 is attached to the ventilator circuit 26, and the male terminal portion 21 is connected to the inner cylinder 23 of the female terminal portion 22 in a conical connection state. It is.

  The connection between the male terminal portion 21 and the female terminal portion 22 needs to be removed very quickly. However, in the conventional rotary connector, the outer cylindrical body 24 can be applied even if the outer cylindrical body 24 is gripped with a finger and twisted. Rotates with respect to the inner cylindrical body 23, and it is difficult to remove the male terminal portion 21 from the female terminal portion 22.

Therefore, a one-touch connector that employs a latch mechanism has been proposed as a connector that can be easily detached while having a rotation mechanism in the connector (see Patent Document 1). Here, since this type of connector is used continuously on the patient's mouth and throat, it is preferable to be small and light, but in the one-touch connector described in Patent Document 1 that employs a latch mechanism, The size and weight of the connector itself will increase.
JP 2004-344281 A

    An object of the present invention is to provide a connector that can be conically joined, can be easily detached while having a rotation mechanism in the connector, and is small and lightweight.

  In order to solve the above problems, the present invention provides the following means.

The rotary connector according to the present invention includes a male terminal portion having a conical outer peripheral surface, and a female terminal portion having a conical inner peripheral surface connected to the conical outer peripheral surface in a conical joined state. And the male terminal portion include an inner cylinder and an elastically deformable outer cylinder in which the inner cylinder is inserted so as to be relatively rotatable, and an outer peripheral surface of the inner cylinder and the outer cylinder Between the inner peripheral surface of the inner cylindrical body and an outer peripheral surface of the inner cylindrical body. It is comprised from the protrusion formed in any one of the internal peripheral surfaces of the said outer cylinder, and the recessed part formed in the other and engageable with the said protrusion.

A rotating connector can be provided with a rotation mechanism by either one of a male terminal part and a female terminal part being comprised by the double cylinder shape of an inner cylinder body and the outer cylinder body relatively rotatable to this. Further, when the outer cylinder body is gripped with a finger and elastically deformed to bring the outer peripheral surface of the inner cylinder body into contact with the inner peripheral surface of the outer cylinder body, the protrusions and the recesses are engaged, and the inner cylinder body and the outer cylinder body are engaged. Since the relative rotation with the body can be restricted, the male terminal portion and the female terminal portion that are conically joined can be easily removed by gripping the outer cylinder and pulling it while twisting.

  In the rotary connector according to the present invention, the female terminal portion includes the inner cylindrical body having the conical inner peripheral surface and the elastically deformable outer cylindrical body in which the inner cylindrical body is inserted so as to be relatively rotatable. Features.

  The outer cylindrical body located on the outermost side of the connector is grasped with a finger by the female terminal portion being configured in a double cylindrical shape of an inner cylindrical body having a conical inner peripheral surface and an outer cylindrical body relatively rotatable therewith. Thus, the relative rotation between the inner cylinder and the outer cylinder can be restricted by elastic deformation.

  Furthermore, the rotary connector according to the present invention is characterized in that the protrusion is a protrusion formed along the axial direction of the female terminal portion, and the recess is a groove engageable with the protrusion.

  When the protrusion and the recess are combined with a ridge and a groove along the axial direction, the length can be given in the axial direction, so that it is possible to widen a gripping position where the rotation can be restrained by gripping with a finger.

  Moreover, the rotary connector according to the present invention is characterized in that it is for connecting a tracheal tube and a ventilator circuit.

When such a rotating connector is used for connection between the tracheal tube and the ventilator circuit, conical joining can be performed, and the connector can be easily detached while having a rotating mechanism, and is small and lightweight. A rotating connector for a tracheal tube can be provided.

  According to the present invention, conical joining is possible, and the connector has a rotating mechanism, and the outer cylinder of the female terminal can be easily removed by grasping with a finger and pulling while twisting, and is small and lightweight. The rotary connector can be provided.

A tracheal tube rotary connector according to an embodiment of the present invention will be described with reference to FIGS. 1 and 2.
FIG. 1 is a longitudinal sectional view of the present embodiment, and FIGS. 2A and 2B are transverse sectional views taken along line AA ′ in FIG. Here, FIG. 2B shows a state when the outer cylindrical body of the female terminal portion is gripped with a finger.

  The tracheal tube rotary connector 1 according to this embodiment includes a male terminal portion 2 connected to the end of the tracheal tube 51 and a female terminal portion 3 connected to the end of the ventilator circuit 52 as shown in FIG. Is done. The male terminal portion 2 is formed in a cylindrical shape as a whole, and the outer peripheral surface of the tip portion excluding the base end portion is a conical outer peripheral surface 4 that is slightly tapered. On the other hand, the female terminal portion 3 is configured as a double cylinder of an inner cylinder 5 and an outer cylinder 6 that are relatively rotatable. The inner peripheral surface of the inner cylinder 5 excluding the base end portion is formed as a conical inner peripheral surface 7 connected to the conical outer peripheral surface 4 of the male terminal portion 2 in a conical joined state. Further, in the inner cylinder 5 and the outer cylinder 6, an annular recess 8 is formed on the outer peripheral surface of the inner cylinder 5 on the side connected to the ventilator circuit 52, and on the inner peripheral surface of the outer cylinder 6. An annular convex portion 9 is formed, and the annular concave portion 8 and the annular convex portion 9 are brought into a fitted state to prevent the inner cylindrical body 5 and the outer cylindrical body 6 from coming off.

In the inner cylinder 5 and the outer cylinder 6 at the front end portion on the connection side with the male terminal portion 2, as shown in FIG. 2A, the outer circumferential surface of the inner cylinder 5 is in the direction of its axis 10. Are formed on the inner peripheral surface of the outer cylindrical body 6 with the same number of grooves 12 that can be engaged with the respective convex strips 11 of the inner cylindrical body 5. Are formed over the entire circumference with a mutual interval engageable with the ridges 11. In this case, the groove 12 is formed slightly larger than the ridge 11.
Further, the groove forming region 13 of the outer cylindrical body 6 is formed in a thin shape and is elastically deformed by being gripped with a finger. In this case, the length of the groove forming region 13 is formed larger than the width of a human finger.
A tongue-like projecting piece 15 is formed along the circumferential direction between the ridge forming region 14 on the outer peripheral surface of the inner cylinder 5 and the annular recess 8, and this is formed between the groove forming region 13 of the outer cylinder 6 and the annular The seal portion 16 formed on the inner peripheral surface with the convex portion 9 is in elastic contact. This prevents air flowing in the tracheal tube rotary connector 1 from leaking to the outside.

In a state where the male terminal portion 2 and the female terminal portion 3 of the tracheal tube rotating connector 1 are connected, the male terminal portion 2 and the inner cylindrical body 5 of the female terminal portion 3 are connected in a conical connection state and are not easily detached. It is like that. To release the connection between the male terminal portion 2 and the female terminal portion 3, the female terminal portion 3 is moved toward the respiratory circuit 52 while twisting while gripping the outer cylindrical body 6 with a finger, and the male terminal portion 2 is pulled out. It will be. That is, when the groove forming region 13 of the outer cylindrical body 6 is gripped with a finger as shown by a white arrow in FIG. 2B, the portion gripped by the finger and its peripheral portion are bent, and these portions are the inner cylindrical body 5. In contact with the outer circumferential surface. Then, the ridges 11 formed on the outer peripheral surface of the inner cylinder 5 and the grooves 12 formed on the inner peripheral surface of the outer cylinder 6 are engaged as shown in FIG. Relative rotation with the cylinder 6 is restricted. The inner cylinder 5 and the outer cylinder 6 can be rotated together by the twisting force applied to the outer cylinder 6, and the inner cylinder 5 can be easily detached from the male terminal portion 2. That is, the protruding means 11 and the groove 12 constitute the engaging means of the present invention.
Even when the ridge 11 and the groove 12 are misaligned when the groove forming region 13 of the outer cylinder 6 is gripped with a finger, the outer cylinder 6 is rotatable with respect to the inner cylinder 5 when twisting is applied. Therefore, the groove 12 formed on the inner peripheral surface of the outer cylindrical body 6 moves along the outer peripheral surface of the inner cylindrical body 5, and the ridge 11 formed on the outer peripheral surface of the inner cylindrical body 5 eventually becomes the groove 12. The relative rotation between the inner cylinder 5 and the outer cylinder 6 is restricted.

  The small and lightweight tracheal tube rotary connector capable of conical connection according to this embodiment has a rotating mechanism in the connector, and is easily removed from the male terminal portion by holding the female terminal portion with a finger and pulling it while twisting. be able to.

When the rotary connector for tracheal tube of this embodiment is applied to an international standard product of 22 mm / 15 mm coaxial conical joint, for example, a polypropylene resin having a Rockwell hardness of 80 to 105 is used for both the male terminal portion 2 and the female terminal portion 3. Is used. The inner cylinder 5 has an inner diameter of about 15 mm and the outer cylinder 6 has an outer diameter of about 22 mm. The thickness a of the inner cylinder 5 in the ridge formation region 14 is 1.4 mm, and the height b of the ridge 11. Is 0.6 mm, the thickness c of the outer cylinder 6 in the groove forming region 13 is as thin as 1.0 mm in order to facilitate elastic deformation, and the depth d of the groove 12 is 0. .5 mm.
In addition to polypropylene resin, any crystalline resin that does not break even when deformed can be used. If necessary, a hard material is used for the inner cylinder 5 and a soft material is used for the outer cylinder 6. It is also possible to combine the materials.
The rotary connector according to the present invention can be used not only for a tracheal tube but also for a tracheostomy tube, and the tracheal tube in the present invention includes a tracheostomy tube.

  The rotary connector according to the present invention may be used not only in the connection between a tube through which gas flows and an external circuit like the rotary connector for a tracheal tube of the embodiment, but also in an infusion path of a liquid such as a drug solution or blood.

  Further, in the above embodiment, the engaging means according to the present invention is constituted by the ridges 11 and the grooves 12 along the axial direction of the inner cylindrical body 5 and the outer cylindrical body 6, but the outer cylindrical body is gripped. If it can engage and restrain the relative rotation of both cylinders, it does not have to be formed along the axial direction. For example, it has a simple combination of protrusions and recesses, or has fine irregularities. A rough surface or the like may be used.

  Further, in the rotary connector according to the present invention, the rotation mechanism and the restraining means of the rotation mechanism are provided in the female terminal portion in the embodiment, but these may be provided in the male terminal portion.

  Further, the rotary connector according to the present invention is a rotary connector having a 15 mm / 22 mm coaxial conical joint in the above embodiment, but is not limited to this, a 15 mm conical connector, a 22 mm conical connector, a 30 mm conical connector, a luer connector, and an elbow connector. For circuit products such as artificial respiration circuits, artificial noses (HME), water traps, filters, etc., medical syringes, enteral nutrition lines, flow sensors, etc. May be used.

It is a longitudinal cross-sectional view of the rotation connector for tracheal tubes which concerns on one Embodiment of this invention. (A) Cross-sectional view of the rotary connector for tracheal tube in FIG. 1A-A ′, (b) Cross-sectional view of the rotary connector for tracheal tube in FIG. 1A-A ′ when the outer cylindrical body of the female terminal portion is gripped with a finger FIG. It is a longitudinal cross-sectional view of the conventional rotary connector.

Explanation of symbols

1 ... rotating connector for tracheal tube (rotating connector), 2 ... male terminal,
3 ... Female terminal part, 4 ... Conical outer peripheral surface, 5 ... Inner cylinder, 6 ... Outer cylinder,
7 ... Conical inner peripheral surface, 8 ... Annular concave part, 9 ... Annular convex part, 10 ... Axle,
11 ... ridge, 12 ... groove, 13 ... groove forming region, 14 ... ridge forming region,
15 ... tongue-like protrusion, 16 ... seal part,
51 ... Tracheal tube, 52 ... Ventilator circuit a ... Thickness in the ridge formation region of the inner cylinder, b ... Height of the ridge,
c: Thickness in the groove forming region of the outer cylinder, d: Depth of the groove

Claims (4)

A male terminal portion having a conical outer peripheral surface, and a female terminal portion having a conical inner peripheral surface connected to the conical outer peripheral surface in a conical joint state,
Either one of the female terminal portion and the male terminal portion includes an inner cylindrical body and an elastically deformable outer cylindrical body in which the inner cylindrical body is inserted so as to be relatively rotatable,
Between the outer peripheral surface of these inner cylindrical bodies and the inner peripheral surface of the outer cylindrical body, it is provided with engaging means that can contact each other by elastic deformation of the outer cylindrical body and restrain the relative rotation ,
The engaging means includes a protrusion formed on one of the outer peripheral surface of the inner cylinder and the inner peripheral surface of the outer cylinder, and a recess formed on the other and engageable with the protrusion. rotating connector, characterized by that. 2. The female terminal portion includes an inner cylinder having the conical inner peripheral surface and an elastically deformable outer cylinder in which the inner cylinder is inserted so as to be relatively rotatable. Rotating connector. The rotary connector according to claim 1 , wherein the protrusion is a protrusion formed along the axial direction of the female terminal portion, and the recess is a groove engageable with the protrusion. The rotary connector according to any one of claims 1 to 3, wherein the rotary connector is for connecting a tracheal tube and a ventilator circuit.

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