JP2012225486A - Connector - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a connector which surely connects tubes with fewer components and in a simple structure, and also is reduced in outer diameter.SOLUTION: The connector 10 connects a first tube 1 having an annular protrusion 1a, and a second tube, and includes: a body 20 having a connecting part 21 and an inserting part 23; an O ring 60; and a retainer 40. The retainer 40 has: a body part 41 controlling the movement of the O ring 60; and an engagement piece 47 arranged continuing from the body part 41 via a slit 45, and having an engagement claw 53 formed at the end 51 thereof. An opening 31 is formed in the body 20, and the end 51 of engagement piece 47 of the retainer 40 is inserted into the opening 31. Then, the engagement piece 47 can be deflected outward from the outside of the body 20.

Description

  The present invention relates to a connector for connecting pipe bodies such as hoses and pipes.

  For example, a plurality of hoses are used in an automobile radiator, a heater unit, and a fuel supply system. A connector is used for connecting these hoses, tubes, or pipes such as pipes.

  As a conventional connector of this type, the following Patent Document 1 (Japanese Patent Laid-Open No. 8-233181) discloses a body having a hose connection portion and a tube insertion portion and a clip fitting portion on the outer periphery of the tube insertion portion. The clip is attached to the tube insertion portion and fixed to the tube insertion portion, and the clip is formed to cover the outer periphery of the clip insertion portion, and the clip is fitted to the inner peripheral surface. A locking claw that protrudes to the tube insertion portion through the stop hole of the landing portion and locks the tube body is provided, and the locking claw permits insertion of the tube body to prevent the inserted tube body from being removed, and the clip A connector characterized by having a structure in which a tubular body can be removed by an expansion operation is disclosed. An O-ring for sealing a gap between the tube insertion portion and the tube body is disposed in the tube insertion portion of the body, and is prevented from coming off by a cylindrical stopper.

JP-A-8-233181

  However, in the connector described in Patent Document 1, since the O-ring is retained by a cylindrical stopper, the number of parts is large and the cost is increased.

  In addition, an annular clip is attached to the outer periphery of the body, and a structure in which the clip's locking claw protrudes into the tube insertion portion through the stop hole of the clip fitting portion tends to increase the outer diameter of the connector. there were.

  Therefore, an object of the present invention is to provide a connector that can reduce the number of parts and can reliably connect pipes with a simple structure, and can reduce the outer diameter of the connector to achieve a compact structure. There is to do.

  In order to achieve the above object, the connector of the present invention is for connecting a first tubular body having an annular protrusion formed on the outer periphery thereof and a second tubular body made of a hose or the like, one end of which is described above. A connecting portion for connecting the second tubular body, the other end of the tubular body forming the insertion portion of the first tubular body, and a rear portion in the insertion portion of the body, wherein the first tubular body is An O-ring that is inserted and seals the outer periphery of the first tube body and the inner periphery of the body, and is disposed closer to the opening side than the O-ring in the insertion portion of the body, and moves the O-ring toward the opening side. A retainer that engages with the annular protrusion of the first tubular body and prevents the retainer from coming off, and the retainer includes an annular main body that restricts movement of the O-ring, and the O of the main body. The side portion of the base end portion is connected to the end surface opposite to the ring, and A circular slit is formed along the circumferential direction of the main body portion from the base end portion through a circumferential slit formed between the body portion and the annular protrusion of the first tubular body at the distal end portion. An engaging piece formed with an engaging claw to be engaged, and the body has an opening along a circumferential direction at a portion where the engaging piece is located when the retainer is disposed in the insertion portion. The tip of the engaging piece of the retainer is inserted into the opening, and the engaging piece can be bent outward from the outside of the body. To do.

  In the connector of the present invention, a base end portion is connected to two end portions of the retainer on the side opposite to the O-ring of the main body portion in an arc shape along the circumferential direction of the main body portion. It is preferable that two extended engagement pieces are provided.

  In the connector of the present invention, a rib is projected along the axial direction in the insertion portion of the body, and a guide groove into which the rib is inserted is formed on the outer periphery of the main body portion of the retainer. preferable.

  The connector according to the present invention is inserted into the opening so that a portion of the engagement piece that reaches the distal end wraps with the inner surface of the opening of the body when viewed in the axial direction of the body. It is preferable that

  In the connector of the present invention, the distal end portion of the locking piece of the retainer has an outer peripheral surface extending in a tangential direction from the peripheral surface of the main body portion, and the distal end surface forms a surface along the radial direction. Preferably it is.

  According to the above invention, the O-ring is disposed at the back of the insertion portion of the body, the retainer is inserted into the insertion portion of the body while the engagement piece of the retainer is bent inward, and the distal end portion of the engagement piece is inserted into the body. By inserting it into the opening, the retainer itself can be prevented from being detached and mounted while the O-ring is prevented from being removed by the main body of the retainer.

  Then, when a second tube made of a hose or the like is connected to one end of the body and the first tube is inserted into the insertion portion of the body, the tip of the first tube is inserted through the inner periphery of the O-ring, The outer periphery of the distal end portion of the one tube body and the inner periphery of the body are sealed by an O-ring, and the engagement protrusions of the engaging pieces of the retainer are engaged with the annular protrusion of the first tube body, so that the first tube body is It is prevented from coming off. As a result, the first tube body and the second tube body can be connected with one touch via the connector.

  Further, by pushing the tip of the engagement piece inserted into the opening of the body with a finger or the like through the opening and bending the engagement piece outward, the annular protrusion of the first tubular body and the engagement claw In this state, by pulling the first tubular body out of the body, the connection can be released and the first tubular body and the second tubular body can be separated.

  In the present invention, since the retainer retains the O-ring, it is not necessary to separately provide a member for retaining the O-ring as in the connector of Patent Document 1, and the number of parts can be reduced. it can.

  Further, since the retainer is disposed inside the body and the distal end portion of the engaging piece is accommodated so as to be inserted into the opening provided in the body, the clip is mounted on the outer periphery of the body of Patent Document 1. The outer diameter can be made smaller than the connector.

  Further, the engaging piece of the retainer is connected to the end face of the main body at the base side, and has a shape extending in an arc shape along the circumferential direction of the main body. Compared to an elongated structure, the length of the retainer in the axial direction can be shortened, and the total length of the connector can be shortened.

It is a disassembled perspective view which shows one Embodiment of the connector which concerns on this invention. It is a perspective view of the connector. (A) is a front view of the retainer which comprises the connector, (b) is a front view of the body which comprises the connector. FIG. 4 is an exploded cross-sectional view showing a state before insertion of a first tubular body in the connector. In the connector, it is sectional drawing which shows the state which connected the 1st tubular body and the 2nd tubular body. FIG. 4 is an explanatory diagram of a state where a retainer is attached to the body in the connector.

  Hereinafter, an embodiment of a connector according to the present invention will be described with reference to FIGS.

  As shown in FIGS. 1 and 5, the connector 10 according to the present embodiment connects the first tubular body 1 having an annular protrusion 1 a formed on the outer periphery and the second tubular body 2 (see FIG. 5). Is for. Examples of pipes include hoses, tubes, pipes, etc. used in automobile radiators, heater units, fuel supply systems, etc., and can also be used to connect pipes placed in other locations. Can do. For example, as shown by an imaginary line in FIG. 5, a tubular body 3 (such as a hose or a tube) separate from the first tubular body is attached to the outer periphery of the first tubular body 1. The separate tubular body 3 and the second tubular body 2 may be connected via each other.

  The connector 10 has a tubular body 20 whose one end forms a connection portion 21 for connecting the second tubular body 2 and whose other end forms an insertion portion 23 of the first tubular body 1, and an insertion portion of the body 20. 23, the O-ring 60 that seals the outer periphery of the first tube 1 and the inner periphery of the body 20, the first tube 1 being inserted into the inner periphery thereof, The insertion portion 23 is disposed closer to the opening 23a than the O-ring 60, restricts the movement of the O-ring 60 toward the opening 23a, and engages with the annular protrusion 1a of the first tubular body 1 to prevent it from coming off. The retainer 40 is provided.

  As shown in FIGS. 1 and 4, the body 20 is formed in a substantially circular shape that extends at a predetermined length and is open at both ends in the axial direction, and annular ribs 21 a are arranged at predetermined intervals on the outer periphery of the connecting portion 21 at one end. A plurality of protrusions are provided to prevent slipping, and the second tubular body 2 (see FIGS. 4 and 5) is extrapolated and connected to the outer periphery of the connecting portion 21. The insertion portion 23 is formed at a predetermined distance from the opening 23a inside the other end of the body 20, and the first tubular body 1 is inserted into the insertion portion 23 (see FIG. 5). .

  As shown in FIGS. 4 and 5, the internal shape of the body 20 has a diameter that is gradually reduced from the opening 23 a side of the insertion portion 23. That is, an O-ring arrangement portion 25 is formed in the back of the insertion portion 23 of the body 20 so as to have a diameter smaller than the inner diameter of the insertion portion 23 and the O-ring 60 is arranged. A tube insertion portion 27 is formed which is smaller in diameter than the inner diameter of the O-ring arrangement portion 25 and into which the distal end portion of the first tube body 1 is inserted.

  Further, as shown in FIG. 1 and FIG. 3B, a rib 29 extending along the axial direction has a length from the opening 23a to the O-ring arrangement portion 25 at a position opposed to the inner periphery of the insertion portion 23. 29 are protruded. As shown in FIG. 3B, one outer surface 29 a of each rib 29 extends in the radial direction toward the axis C <b> 1 of the body 20, and the other outer surface 29 b faces in the inner diameter direction of the body 20. The rib 29 has a tapered shape that gradually narrows.

  Further, as shown in FIG. 1, an opening 31 communicating with the insertion portion 23 is formed along the circumferential direction of the body 20 on the outer periphery of the other end of the body 20. In this embodiment, a pair of openings 31, 31 are formed opposite to each other at a position spaced apart from the other end opening 23 a of the body 20 in the axial direction and between the ribs 29, 29. Yes. Each opening 31 extends from the outer surface 29a of one rib 29 to a length slightly ahead of the outer surface 29b of the other rib 29 (see FIG. 1).

  The retainer 40 disposed in the insertion portion 23 of the body 20 has a main body portion 41 and an engagement piece 47. The main body portion 41 is formed in an annular shape with an outer diameter substantially matching the inner diameter of the insertion portion 23 of the body 20, and is disposed in the insertion portion 23 of the body 20 as shown in FIG. This is a part that regulates the movement of the O-ring 60 arranged in the arrangement unit 25. In addition, guide grooves 43 and 43 into which ribs 29 and 29 projecting into the insertion portion 23 of each body 20 are inserted are formed in opposing portions on the outer periphery of the main body 41. The inner surface of each guide groove 43 has a shape suitable for the guide groove 43. That is, as shown in FIG. 3A, one inner side surface 43 a of each guide groove 43 extends in the radial direction toward the axis C <b> 2 of the main body portion 41, and the other inner side surface 43 b A tapered shape is formed to gradually expand the guide groove 43 toward the outer diameter direction.

  On the other hand, the engagement piece 47 is connected to the end surface of the main body 41 opposite to the O-ring 60 at the side portion of the base end portion 49, and is formed in the circumferential direction between the main body portion 41 and the engagement piece 47. Through the slit 45 (see FIGS. 1 and 4), the arc extends along the circumferential direction of the annular main body 41 from the base end portion 49, and can be bent outward and inward of the retainer 40. It is said that.

  In this embodiment, the base end portions 49 of the pair of engagement pieces 47 and 47 are connected to two places in the circumferential direction on the end surface opposite to the O-ring 60 of the main body 41, and the engagement pieces 47 and 47 are connected. Is extended in an arc shape in the same direction along the circumferential direction. Specifically, as shown in FIGS. 1 and 3A, the base end portions 49, 49 of the engagement piece 47 are connected to the positions adjacent to the guide grooves 43, 43 of the main body portion 41, The tip portions 51, 51 are extended so as to be opposed to each other in the circumferential direction of the main body portion 41. Note that the width of the engaging piece 47 along the axial direction of the retainer 40 is set to a size substantially matching the width of the opening 31 of the body 20.

  An engagement claw 53 that engages with the annular protrusion 1 a of the first tubular body 1 is formed on the inner periphery of the distal end portion 51 of each engagement piece 47. A side surface 53a of the engagement claw 53 opposite to the main body 41 has a tapered shape that gradually protrudes inward toward the main body 41.

  Further, as shown in FIG. 3A, the distal end portion 51 of the engagement piece 47 has a shape in which an outer peripheral surface 51a extends and projects in a tangential direction from the peripheral surface of the main body portion 41, and The front end surface 51 b forms a surface along the radial direction of the retainer 40. As shown in FIGS. 1 and 4, a streak-like groove is formed on the distal end surface 51 b of the distal end portion 51, and a slip stopper is provided when the engaging piece 47 is bent through the distal end portion 51. There is no.

  As shown in FIGS. 2 and 6, when the main body portion 41 of the retainer 40 is disposed in the insertion portion 23 of the body 20, the distal end portion 51 of the engagement piece 47 is inserted and disposed in the opening portion 31 of the body 20. The retainer 40 is prevented from coming off, and a finger or the like is inserted into the opening 31 and pulled toward the outside while pressing the tip 51, thereby bending the engagement piece 47 outward from the outside of the body 20. It can be done. In addition, it is preferable that the front-end | tip part 51 of the engagement piece 47 is formed in the height which protrudes outward from the outer periphery of the opening part 31 of the body 20, and it is outward from the outer periphery of the opening part 31 in this embodiment. It has a protruding height.

  The outer peripheral radius R2 (see FIG. 3A) of the intermediate portion 55 from the base end portion 49 of the engagement piece 47 to the tip end portion 51 with respect to the axis C2 of the retainer 40 is the insertion portion 23 of the body 20. The inner radius R1 (see FIG. 3B) with respect to the axis C1 is slightly larger. Therefore, when the main body portion 41 of the retainer 40 is disposed in the insertion portion 23 of the body 20 and the distal end portion 51 of the engagement piece 47 is inserted into the opening portion 31 of the body 20, as shown in FIG. The middle portion 55 of the piece 47 slightly wraps on the inner side surface 31 a of the opening 31, in other words, a part of the outer periphery of the middle portion 55 enters the opening 31.

  In this embodiment, the outer peripheral radius R2 of the intermediate portion 55 of the engagement piece 47 with respect to the axial center C2 of the retainer 40 is slightly larger than the inner peripheral radius R1 of the insertion portion 23 of the body 20 with respect to the axial center C1. However (see FIGS. 3A and 3B), the outer peripheral radius R2 of the intermediate portion 55 of the engagement piece 47 with respect to the axis C2 of the retainer 40 is set to the inner radius of the insertion portion 23 of the body 20 with respect to the axis C1. It may be formed slightly smaller than the circumferential radius R1.

  Next, the effect of the connector 10 having the above configuration will be described.

  First, the O-ring 60 is inserted into the insertion portion 23 from the other end opening 23 a of the body 20, and the O-ring 60 is disposed in the O-ring arrangement portion 25 at the back of the insertion portion 23. Thereafter, the guide grooves 43 and 43 of the retainer 40 are aligned with the ribs 29 and 29 of the body 20, and the main body portion 41 of the retainer 40 is inserted into the insertion portion 23 of the body 20. Then, the rib 29 is inserted into the guide groove 43 and the retainer 40 is prevented from rotating.

  In this state, the pair of engagement pieces 47 are bent and deformed inward of the retainer 40, and the distal end portion 51 is inserted into the insertion portion 23 of the body 20, and the rib 29 inserted into the guide groove 43. Thus, the retainer 40 is pushed in while being guided.

  At this time, in this embodiment, the outer peripheral surface 51a of the distal end portion 51 of the engagement piece 47 has a shape that extends in a tangential direction from the peripheral surface of the main body portion 41, so that the retainer 40 is attached to the body 20. When inserting into the insertion part 23, the amount of bending inward of the engagement piece 47 can be reduced to facilitate the insertion operation.

  When the engagement piece 47 reaches the opening 31 of the body 20, the bent engagement piece 47 is elastically restored, and the intermediate portion 55 of the engagement piece 47 is slightly wrapped on the inner surface 31 a of the opening 31. However, the tip 51 is inserted into the opening 31 and slightly protrudes from the outer periphery of the opening 31. As a result, the retainer 40 itself is prevented from being detached, and the O-ring 60 is also retained by the main body 41 of the retainer 40, so that the retainer 40 can be mounted in the insertion portion 23 of the body 20 (FIGS. 2 and 6). reference).

  As described above, in the connector 10, the main body portion 41 of the retainer 40 can restrict the axial movement of the O-ring 60 and prevent the O-ring 60 from falling into the body 20. In addition, it is not necessary to separately provide a member such as a stopper for preventing the O-ring from coming off, thereby reducing the number of parts and reducing the manufacturing cost.

  Further, when the retainer 40 is mounted on the body 20 described above, in this embodiment, a rib 29 projects from the insertion portion 23 of the body 20 and a guide groove 43 is formed on the outer periphery of the main body 41 of the retainer 40. Therefore, by aligning the rib 29 of the body 20 with the guide groove 43 of the retainer 40 and pushing the retainer 40 into the insertion portion 23, the retainer 40 is prevented from rotating, and the retainers 40 are inserted into the openings 31 and 31 of the body 20. The ribs 29 slide in the guide grooves 43 while accurately positioning the engagement pieces 47, 47 of the 40, and the pushing operation of the retainer 40 can be guided, and the retainer 40 can be smoothly and accurately guided to the body 20. Can be installed.

  When connecting the first tubular body 1 and the second tubular body 2, the end of the second tubular body 2 is extrapolated to the outer periphery of the connecting portion 21 of the body 20, and the inner periphery of the second tubular body 2 is connected. The second rib 2 is connected to the connecting portion 21 by biting the annular rib 21a. The connection of the second tubular body 2 to the body 20 may be performed after the first tubular body 1 is engaged with the body 20.

  Next, the first tubular body 1 is inserted into the insertion portion 23 of the body 20. Then, the annular protrusion 1 a of the first tubular body 1 presses the tapered inner side surface 53 a of the engagement claw 53, and the pair of engagement pieces 47 and 47 are bent and deformed outward, so that the engagement claw 53. When the crossing over the annular protrusion 1a, each engagement piece 47 is elastically restored, the engagement claw 53 engages with the annular protrusion 1a, and the first tubular body 1 is connected to the body 20 in a state of being prevented from coming off. (See FIG. 5). At the same time, the distal end portion of the first tubular body 1 is inserted into the inner periphery of the O-ring 60 and inserted into the tubular body insertion portion 27 of the body 20, and the distal end portion outer periphery of the first tubular body 1 and the body 20 are inserted. Is sealed by an O-ring 60. In this way, the first tubular body 1 and the second tubular body 2 are connected to each other via the connector 10 with a simple operation by simply inserting the first tubular body 1 into the insertion portion 23 of the body 20. be able to.

  Further, in this connector 10, as shown in FIGS. 2 and 6, when the main body portion 41 of the retainer 40 is disposed in the insertion portion 23 of the body 20, the distal end portion 51 of the engagement piece 47 is the opening portion of the body 20. Since it is inserted and arranged at 31, the distal end portion 51 of the engagement piece 47 can be touched through the opening 31 from the outside of the body 20.

  Therefore, when it is desired to separate the first tubular body 1 and the second tubular body 2, the distal end surface 51b of the distal end portion 51 of the engaging piece 47 inserted into the opening 31 of the body 20 is pressed with a finger or the like. Then, as shown by an imaginary line in FIG. 6, by engaging the engagement piece 47 outward, the engagement between the annular protrusion 1 a of the first tubular body 1 and the engagement claw 53 of the retainer 40 is performed. Since the first tubular body 1 is pulled out from the insertion portion 23 of the body 20 in this state, the connection between the first tubular body 1 and the second tubular body 2 can be released and separated. . At this time, since the rib 29 of the body 20 is inserted into the guide groove 43 of the retainer 40 and the retainer 40 is prevented from rotating, the engagement piece 47 can be reliably bent outward.

  In the connector 10, the retainer 40 is disposed in the insertion portion 23 of the body 20, and the distal end portion 51 of the engagement piece 47 is inserted into the opening 31 provided in the body 20. Yes. When the engagement piece 47 is bent outward, a finger can be inserted into the opening 31 to push the distal end portion 51 of the retainer 40, so that the distal end portion 51 of the retainer 40 is moved from the outer periphery of the body 20. There is no need to make it protrude greatly, the outer diameter of the connector 10 can be reduced, and a compact structure can be achieved. As a result, it is possible to increase the degree of freedom of the installation location and layout of the connector 10 and to provide a user-friendly connector 10.

  Further, the engaging piece 47 of the retainer 40 has a shape in which the side portion of the base end portion 49 is connected to the end surface of the main body portion 41 and extends in an arc shape along the circumferential direction of the main body portion 41. Compared to a structure in which the engagement piece extends in the axial direction, the axial length of the retainer 40 can be shortened, and the total length of the connector 10 can be shortened.

  Furthermore, in this embodiment, since the pair of engagement pieces 47, 47 are provided at positions facing the circumferential direction of the retainer 40, these engagement pieces are provided on the annular protrusion 1a of the first tubular body 1. 47, 47 can be engaged to prevent the first tubular body 1 from coming off in a well-balanced manner, and the distal end portion 51 of the engagement piece 47 is pushed with a finger or the like to bend the engagement piece 47 outward. (See FIG. 6), it is only necessary to bend the engagement claws 53 of the individual engagement pieces 47 so as to be disengaged from the annular protrusion 1a. Can be easily performed. Further, since the amount of bending of each engagement piece 47 is small, it is not necessary to make a large surrounding space, and it can be applied to various places.

  Further, in this embodiment, as shown in FIG. 6, the main body portion 41 of the retainer 40 is disposed in the insertion portion 23 of the body 20, and the distal end portion 51 of the engagement piece 47 is inserted into the opening portion 31 of the body 20. Since the middle portion 55 of the engagement piece 47 wraps around the inner side surface 31a of the opening 31, the engagement piece 47 is wide on the inner side 31a of the opening 31 of the body 20. The connector 10 can be made compact by wrapping the engagement piece 47 of the retainer 40 and the body 20 in the thickness direction while increasing the retaining force of the first tubular body 1 by engaging. it can.

  Furthermore, in this embodiment, as shown in FIG. 3A, the distal end portion 51 of the engagement piece 47 has a shape in which the outer peripheral surface 51a extends from the peripheral surface of the main body 41 in the tangential direction and protrudes. None, since the front end surface 51b forms a surface along the radial direction of the body 20, it can be easily pushed with a finger or the like, and the engagement piece 47 can be easily bent outward.

DESCRIPTION OF SYMBOLS 1 1st pipe body 1a Annular protrusion 2 2nd pipe body 10 Connector 20 Body 21 Connection part 23 Insertion part 23a Opening 31 Opening part 31a Inner side surface 40 Retainer 41 Main body part 43 Guide groove 45 Slit 47 Engagement piece 49 Base end part 51 End 51a Outer peripheral surface 51b End surface 53 Engaging claw 55 Midway portion 60 O-ring

Claims (5)

A connector for connecting a first tubular body having an annular protrusion on the outer periphery and a second tubular body made of a hose or the like,
A tubular body having one end forming a connecting portion for connecting the second tubular body and the other end forming an insertion portion of the first tubular body;
An O-ring which is disposed in the interior of the insertion portion of the body and through which the first tubular body is inserted to seal the outer periphery of the first tubular body and the inner periphery of the body;
A retainer that is disposed on the opening side of the O-ring in the insertion portion of the body, restricts the movement of the O-ring to the opening side, and engages with the annular protrusion of the first tubular body to prevent it from coming off. And
The retainer is connected to an annular main body that restricts movement of the O-ring, and a side portion of a base end to an end surface of the main body opposite to the O-ring, and between the main body and the retainer. An engagement that extends in a circular arc shape from the base end portion along the circumferential direction of the main body portion through a circumferential slit formed in the front end portion and engages with the annular protrusion of the first tubular body at the distal end portion An engaging piece formed with a claw,
In the body, when the retainer is disposed in the insertion portion, an opening portion is formed along a circumferential direction in a portion where the engagement piece is located, and the opening of the engagement piece of the retainer is formed in the opening portion. A connector, wherein a distal end portion is inserted and the engagement piece can be bent outward from the outside of the body.   The end surface of the retainer on the opposite side of the O-ring from the O-ring has two proximal ends connected to the circumferential direction, and two arcs extending along the circumferential direction of the main body. The connector according to claim 1, wherein an engagement piece is provided.   The connector according to claim 1 or 2, wherein a rib is projected along the axial direction in the insertion portion of the body, and a guide groove into which the rib is inserted is formed on an outer periphery of the main body portion of the retainer. .   2. The intermediate portion of the engagement piece reaching the distal end is inserted into the opening so as to wrap with the inner surface of the opening of the body when viewed in the axial direction of the body. The connector as described in any one of -3.   The distal end portion of the retaining piece of the retainer has an outer peripheral surface extending in a tangential direction from the peripheral surface of the main body portion, and the distal end surface forms a surface along the radial direction. The connector according to any one of the above.

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