JP2006266472A - Quick connector - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a quick connector with a wire retainer for securing quick pipe connecting work without particularly impairing stable connection between the connector and a pipe body. <P>SOLUTION: The quick connector 1 comprises a connector housing 3 and the wire retainer 5. Engaging slits 23, 23 are provided in a retainer mounting portion 15 of the connector housing 3. The wire retainer 5 is mounted on the retainer mounting portion 15 so that an engaging arm 59 enters into the engaging slit 23 and protrudes into the retainer mounting portion 15. The width of each engaging slit 23 is set to be sufficiently larger than the diameter of the engaging arm 59. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a quick connector used for connecting automobile piping, for example.

  A connector for connecting a pipe body and a hose is used for a fluid piping structure configured by connecting a pipe body and a hose. Such a connector has a cylindrical connector housing in which a connecting portion to which a hose is connected is formed on one side in the axial direction, and the connection between the pipe body and the connector is, for example, the insertion side of the pipe body An annular engagement projection is formed on the outer peripheral surface to form an insertion end, and a retainer means for snap engagement is provided on the other axial side of the connector housing to place the connector in a quick connection type, and a pipe body Is inserted into the connector housing from the opening on the other side end in the axial direction, and the retainer means and the annular engagement projection are snap-engaged to keep the pipe body and the connector from coming off. . As a retainer means used for the quick connection type quick connector, a pair of engagement slits are provided on the other side in the axial direction of the connector housing so as to be opposed to each other in the radial direction, and a U shape having a pair of engagement arms or Using a substantially U-shaped wire retainer (for example, a wire retainer), connect the wire retainer to the other side in the axial direction of the connector housing so that the pair of engagement arms enter the engagement slit and sandwich the connector housing. Attaching to the outer periphery on the other side in the axial direction is known (for example, see Patent Document 1). By adopting such a retainer means, even when the connector has a relatively large diameter, it is possible to ensure sufficient attachment stability of the retainer to the connector housing.

JP 2003-21287 A

  By the way, in such a connector, the pipe body inserted into the connector housing is prevented from coming off so that there is no play in the axial direction, and in order to ensure a stable connection between the connector and the pipe body, The width is set to be substantially the same as the diameter of the engagement arm. However, if the width of the engagement slit is set to be the same as the diameter of the engagement arm, when the engagement arm of the wire retainer is closed and engaged with the annular engagement protrusion of the pipe body, A large sliding resistance is applied from the slit, and the snap closing operation of the engaging arm becomes slow, and it may be difficult for the operator to easily determine that the connector and the pipe body are completely connected. There is. And when such a situation arises, the relative pushing operation | work to the connector housing of a pipe body will be repeated many times, and the quickness of piping connection work will be impaired.

  SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a quick connector including a wire retainer that can ensure a quick pipe connection operation without harming the stable connection between the connector and the pipe body.

  In order to achieve this object, the quick connector of the present invention has a connecting portion connected to a hose formed on one side in the axial direction, and a pair of engaging slits formed on the other side in the axial direction so as to face each other in the radial direction. A cylindrical connector housing and a pair of engagement arms, and the pair of engagement arms enter the engagement slit and sandwich the connector housing, thereby moving the connector housing to the other side in the axial direction. An attached U-shaped or substantially U-shaped wire retainer, and the engagement arm of the wire retainer projects into the connector housing from the engagement slit, and the insertion end of the pipe body is inserted. When it is pushed, it is pushed by the annular engagement protrusion formed on the insertion end and opens, and the clutch closes and engages with the annular engagement protrusion. Each of the engagement slits has a diameter larger than that of the engagement arm so as to collide with the connector housing or the pipe body to generate a collision sound when the engagement arm completes the closing operation. Has a large width. By the occurrence of the collision sound, the operator can confirm the completion of the closing operation of the engagement arm, that is, the complete connection between the connector and the pipe body. The engagement slit is also formed with a width larger than the diameter of the engagement arm so that the engagement arm performs a snap closing operation smoothly. Here, if the wire retainer is made of metal and the connector housing and / or the pipe body are also made of metal, it is possible to expect a clear collision sound. When the engagement arm collides with the connector housing, for example, the circumferential end of the engagement slit when the engagement arm closing operation is completed, the connector housing is made of metal, and when the engagement arm closing operation is completed, When the engagement arm contacts or collides with the outer periphery of the insertion end of the pipe body (the outer periphery of the insertion end other than the annular engagement protrusion), the pipe body is made of metal. Then, by keeping the width of the engagement slit to a minimum necessary size for generating a clear collision sound, it is possible to keep stable connectivity between the connector and the pipe body.

  Each of the engagement slits preferably has a width that is 1.1 to 1.3 times the diameter of the engagement arm. If the width of the engagement slit is less than 1.1 times the diameter of the engagement arm, it may not be possible to ensure a smooth snap closing operation of the engagement arm, and the width of the engagement slit may be less than the diameter of the engagement arm. If it exceeds 1.3 times, the play of the engagement arm becomes too large, and the stable connectivity between the connector and the pipe body may be impaired.

  It is advantageous that the insertion end of the pipe body is configured so that it can be inserted into the connector housing until the axially other side annular surface of the annular engagement protrusion coincides with at least the axial end of the engagement slit. Is. By configuring in this way, the snap-closing operation of the engagement arm is prevented from being hindered by the sliding resistance of the other annular surface in the axial direction of the annular engagement protrusion.

  As described above, when the quick connector of the present invention is used, the engagement arm of the wire retainer generates a distinction sound or a sign with a sound that can easily confirm the complete connection between the connector and the pipe body. Will be smooth.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  1 is a perspective view of a quick connector according to the present invention, FIG. 2 is a sectional view of the quick connector, FIG. 3 is another sectional view of the quick connector, FIG. 4 is an exploded perspective view of the quick connector, and FIG. FIG.

  The quick connector 1 is used, for example, for connection of an air supply / exhaust pipe of an automobile. As can be understood particularly from FIGS. 1 to 3, the quick connector 1 is attached to the thin connector housing 3 and the connector housing 3. And a U-shaped or substantially U-shaped wire retainer 5. The connector housing 3 is made of, for example, metal, and is integrally configured from a cylindrical hose connection portion 7 (connection portion) on one axial side and a substantially cylindrical pipe insertion portion 9 on the other axial side. In order to connect the large diameter hose and the large diameter pipe body, the large diameter hose is formed relatively short.

  The hose connection portion 7 is composed of a cylindrical connection portion main body 11 and a retaining portion 13 formed integrally with one end portion in the axial direction of the connecting portion main body 11. The diameter is increased in a taper shape from one end in the axial direction toward the other side in the axial direction, and is bent so as to protrude outward in the radial direction from the connecting portion main body 11. For example, one end in the axial direction of the retaining portion 13 is formed to have a smaller diameter than the connecting portion main body 11.

  The pipe insertion portion 9 is formed between the retainer mounting portion 15 on the other side in the axial direction, the pipe support portion 17 on the one side in the axial direction to which the hose connection portion 7 is connected, and the retainer mounting portion 15 and the pipe support portion 17. The pipe support portion 17 is smaller in diameter than the seal holding portion 19 and larger in diameter than the connecting portion main body 11 of the hose connecting portion 7. Yes.

  The annular retainer mounting portion 15 of the pipe insertion portion 9 is formed to have the same diameter as the seal holding portion 19, more specifically, the same diameter as the other side in the axial direction of the seal holding portion 19. It has a structure provided with mounting projections 21 and 21 having cylindrical wall-shaped radially outer walls, and each of the pair of mounting projections 21 and 21 has an arc length of approximately a quarter. Is formed over. However, the mounting protrusion 21 may be formed over the entire circumference. An engagement slit 23 is formed on the radially outer wall portion of each mounting protrusion 21. The engagement slit 23 includes a slit portion 25 formed on one side in the circumferential direction, and a circumferential slit. The other side slit portion 27 is formed on the other side in the direction and has a shape equal to or symmetrical to the one side slit portion 25, and the one side slit portion 25 and the other side slit portion 27 are formed by the one side slit. Between the portion 25 and the other side slit portion 27, a portion 29 having a circumferential width substantially equal to the width of the engagement slit 23 or slightly longer than the width of the engagement slit 23 (for example, approximately twice as long) Part) is left. That is, the engagement slit 23 is divided into the one-side slit portion 25 and the other-side slit portion 27 by, for example, a dividing portion 29 located in the circumferential center. In addition, the width (axial width) of the mounting protrusion 21 is set to approximately three times or three to four times the width (axial width) of the engagement slit 23. Specifically, the width of the engagement slit 23 is set to 2.6 mm to 2.8 mm.

  The circumferential one end wall portion 31 and the circumferential other end wall portion 33 of the mounting protrusion 21 are connected to the dividing portions 29 so as to spread in parallel with the straight line passing through the axial center and the axis, that is, mounting the wire retainer 5. It is formed so as to spread in a direction orthogonal to the direction. Moreover, between the circumferential direction one end wall part 31 of the protrusion part 21 for attachment, and the circumferential direction one end of the one side slit part 25, and between the circumferential direction other end wall part 33 and the other side slit part 27 of the protrusion part 21 for attachment A circumferential interval approximately twice the width of the engagement slit 23 is provided between the other end in the circumferential direction, and one end in the circumferential direction and the other end in the circumferential direction of the mounting projection 21 are Retaining wall portions 35 and 37 having a circumferential length or a circumferential width approximately twice the width of the engagement slit 23 are formed.

  In the mounting projection 21, a slit-like one-side entrance / exit 38 extending short in one axial direction is formed at one circumferential end of the one-side slit 25, and at the other circumferential end of the other-side slit 27. Also, a slit-like other side entrance 39 that is shortly extended on one side in the axial direction is formed.

  In addition, the retainer attaching part 15 of the connector housing 3 is formed in the symmetrical shape which can attach the wire retainer 5 similarly from the radial direction opposite side.

  The other end in the axial direction of the retainer mounting portion 15 (the other end in the axial direction of the pipe insertion portion 9 or the connector housing 3) is integrally provided with an outward flange 40 protruding outward in the radial direction. The flange 40 is formed integrally with the other axial end of the mounting projection 21. Although the outward flange 40 has a circular outer edge, the outer edge of this part is formed so as to be cut off at the corresponding part between the pair of mounting projections 21, 21. It is set in a straight line.

  A rubber O-ring 41 is fitted on the inner peripheral surface of the seal holding part 19 on one side in the axial direction, and a metal bush 43 formed on an annular body is press-fitted on the other side in the axial direction. The O-ring 41 is sandwiched between a stepped portion 44 formed at one end in the axial direction of the seal holding portion 19 and the bush 43 and is positioned in the axial direction. In the seal holding part 19, the other axial side is formed with a slightly larger diameter than the one axial side.

  The bush 43 used in the quick connector 1 is integrated with a receiving portion 51 for receiving an annular engagement protrusion 49 (see FIG. 6) of the pipe body 47 on the other axial side of a simple annular bush body 45. The inner peripheral surface of the receiving portion 51 is enlarged in diameter toward the other axial side so as to correspond to the tapered annular surface on the one axial side of the annular engaging projection 49. It is formed in a tapered shape. A closed portion 53 that protrudes somewhat toward the other side in the axial direction is integrally formed at a radially symmetric position of the receiving portion 51, and each closed portion 53 has a circumferential length corresponding to the mounting protruding portion 21. have. The closed portion 53 has an inner surface formed so as to extend the inner peripheral surface of the receiving portion 51, enters into the mounting protrusions 21, 21, and the inner peripheral surface of the mounting protrusions 21, 21 or Although it is formed to protrude radially outward from the bush main body 45 and the receiving portion 51 so as to be in contact with the inner surface, it has an outer surface corresponding to the inner peripheral surface or inner surface of the mounting protruding portions 21, 21. The central portion (intermediate portion) in the circumferential direction of the portion that enters the mounting protrusion 21 is cut off to form a passage portion 55. Therefore, when the bush 43 is fitted to the connector housing 3, the one-side entrance / exit 38 of the one-side slit portion 25 and the other-side entrance / exit 39 of the other-side slit portion 27 are connected to the inner peripheral surface or the inner surface of the mounting projections 21, 21. The outer peripheral surface or outer periphery of the closed portion 53 that is in contact is configured to be totally or partially closed. Although the passage portion 55 is formed to be slightly deviated to one side in the mounting direction of the wire retainer 5 (refer to FIG. 8, the passage portion 55 is formed to be deviated upward), but is symmetrical to the attachment direction. You may form in.

  The wire retainer 5 includes a connecting portion 57 and a pair of long engaging arms 59, 59 extending linearly in parallel with each other from both sides (both sides in the width direction or both ends in the width direction) of the connecting portion 57. The connecting portion 57 has shoulder portions 61, 61 on both sides, and a U-shape that bulges outward between the shoulder portions 61, 61. A finger hook 63 is provided. Each of the shoulder portions 61 includes a shoulder main body 65 on the engagement arm 59 side and a stopper portion 66 on the finger hanging portion 63 side for making the engagement arm 59 easy to open. Curved in an arc until the end or the end in the width direction of the finger-holding portion 63 is directed to the laterally outer side, that is, the direction in which the engagement arm 59 extends or the direction in which the wire retainer 5 is attached is directed outward. The shoulder main body 65 is inclined so as to correspond to the retaining wall portion 35 on one side in the circumferential direction, and the circumferential length of the retaining wall portion 35. They have the same or almost the same length.

The pair of engagement arms 59, 59 includes a long arm main body 67 that extends linearly from the front end of the shoulder 61 or the shoulder main body 65 (the end opposite to the finger hanging portion 63), and the front end of the arm main body 67 (free And a retaining member 68 formed integrally by bending inwardly at the side end), but here, the wire rod of the wire retainer 5 or the engagement arm 59 or the arm main body 67 The outer diameter is set to 2.3 mm. The retaining engagement portion 68 of the engagement arm 59 is inclined so as to correspond to the retaining wall portion 37 on the other circumferential side of the mounting projection 21, and the circumferential length of the retaining wall portion 37. The engagement main body 69 is bent to the inner side and is formed to have substantially the same length as that of the engagement main body 69. An axial direction portion 71 extending to the side (substantially one axial direction side), and the engagement main body portions 69, 69 of the respective retaining engagement portions 68, 68 are located on the other circumferential side. 37, 37 and the retaining wall portions 37, 37 are formed so as to come into contact with and engage with the outer surfaces of the retaining wall portions 37, 37.

  The length of the arm main body 67 is set to be substantially equal to that of the engagement slit 23, that is, substantially equal to the interval between the one end in the circumferential direction of the one side slit portion 25 and the other end in the circumferential direction of the other side slit portion 27. The interval between the arm main body portions 67 and 67 is set to be substantially equal to the inner diameter of the pipe support portion 17, the inner diameter of the bush main body 45 of the bush 43, or the outer diameter of the pipe body 47.

  In order to assemble the quick connector 1 having such a configuration, first, the wire retainer 5 is attached to the connector housing 3 from the one side slit portion 25 side. The wire retainer 5 is attached by inserting the axial direction portion 71 of the retaining engagement portion 68 into the connector housing 3 from the one side entrance / exit 38 of the one side slit portion 25 and outside the other side entrance / exit 39 of the other side slit portion 27. To protrude. Then, the wire retainer 5 has the shoulder main bodies 65, 65 attached to the retaining wall portions 35, 35 on one side in the circumferential direction of the mounting projections 21, 21, and the retaining wall portions 35, 35 on the outer surface. The stopper portions 66 and 66 are in contact with the circumferential end walls 31 and 31 of the mounting projections 21 and 21, and the stoppers 66 are connected to each other. The joint portions 68 and 68 or the engagement main body portions 69 and 69 are provided along the outer wall of the retaining wall portions 37 and 37 on the other circumferential side of the mounting projections 21 and 21 and the retaining wall portions 37 and 37. Alternatively, they are brought into contact with each other and engaged to be attached to the retainer attaching portion 15 of the connector housing 3. The shoulder main body 65 may be formed so as to be lifted from the retaining wall portion 35 on one side in the circumferential direction of the mounting projection 21. In order to project the axial portion 71 outward from the other side entrance 39 of the other side slit portion 27 and engage the retaining engagement portion 68 or the engagement main body portion 69 with the retaining wall portion 37 in the axial direction, When the portion 71 approaches the other end in the circumferential direction of the other slit portion 27, the insertion of the engagement arm 59 is interrupted, and the engagement arm 59, for example, the axial portion 71 is positioned at the other side entrance 39. The insertion of the engagement arm 59 may be resumed after elastically deforming outward. Then, the axial direction portion 71 comes out of the other side slit portion 27, and the engagement main body portion 69 also comes out of the other side slit portion 27 and engages with the retaining wall portion 37 in the pulling direction (acting pulling resistance). To engage). Thus, in the wire retainer 5, the stopper portions 66, 66 are engaged with the one end wall portions 31, 31 in the circumferential direction of the mounting projections 21, 21, in the insertion direction (so that the insertion resistance acts). In the state in which the retaining engagement portions 68 and 68 are engaged with the mounting projections 21 and 21 in the pulling direction, the retainer mounting portion 15 is sandwiched between the pair of engaging arms 59 and 59 to the quick connector 1. It will be attached. The pair of engaging arms 59 and 59 are inserted into the connector housing 3 with the arm main body 67 protruding from the engaging slits 23 and 23. Here, even if the wire retainer 5 is further pushed in at this attachment position by the contact between the stopper portions 66 and 66 and the one end wall portions 31 and 31 in the circumferential direction of the attachment projections 21 and 21, a pair of engagements is possible. The joint arms 59 and 59 are not opened so as to pass the annular engagement protrusion 49 of the pipe body 47.

  The distance between the one ends in the circumferential direction of the one-side slit portion 25 and the distance between the other ends in the circumferential direction of the other-side slit portion 27 are equal, and the outer diameter of the pipe body 47 (the outer diameter of the portion other than the annular engagement protrusion 49). (More specifically, the distance between the circumferential ends of the one-side slit portion 25 and the distance between the other circumferential ends of the other-side slit portion 27 are outside of the pipe body 47. The wire retainer 5 is attached to the retainer 5 in a state where the pair of engaging arms 59 and 59, more specifically, the pair of arm main bodies 67 and 67 extend in parallel with each other without spreading. It is attached to the part 15.

  Then, as shown in FIG. 4, the bush 43 is pushed into the connector housing 3 with the wire retainer 5 moved in the retracting direction until just before the axial portion 71 enters the other side entrance 39. The interval between the arm main body portions 67 and 67 of the wire retainer 5 or the interval between the arm main body portions 67 and 67 protruding into the connector housing 3 is substantially equal to the interval between the passage portions 55 and 55 of the bush 43. Alternatively, since it extends so as to be slightly larger than the interval between the passage portions 55, 55 (because it extends so as not to cover the outer edge of the bush body 45 or overlap), that is, the engagement arm 59, 59 or the arm main body portions 67 and 67 are opened so as to allow passage of the bush 43, or the engagement arms 59 and 59 or the arm main body portions 67 and 67 are passed through the passage portions 55, 55 and 55 of the bush 43. Since the bush body 45 is opened to allow passage of the bush body 45, the bush 43 is passed through the wire retainer 5 to It can be pressed into the Le holding portion 19. Since the closing portion 53 of the bush 43 partially closes the one-side entrance / exit 38 and the other-side entrance / exit 39, for example, in the quick connector 1, the wire retainer 5 is connected to the connector housing unless the bush 43 is removed from the connector housing 3. There is no such thing as going out of 3.

  6 is a cross-sectional view along the axial direction showing a state in which a rubber hose and a pipe body 47 are connected to the quick connector 1, and FIG. 7 is along a radial direction showing a state in which the pipe body 47 is connected to the quick connector 1. It is sectional drawing.

  The rubber hose 73 is fitted on the outer periphery of the hose connection portion 7 so that the tip end or the other axial end approaches the stepped portion 75 formed at the one axial end of the pipe support portion 17 and is tightened. It is fastened to the connecting portion main body 11 by a band 77 and is connected to the quick connector 1 in a sufficiently secured state. The tightening band 77 is a screw type, but a spring type can also be used. Furthermore, the hose 73 can be prevented from coming off by caulking the ring instead of the band.

  The pipe body 47 inserted into and fitted into the quick connector 1 from the other end opening 79 in the axial direction of the retainer mounting portion 15 is made of, for example, metal, and one side in the axial direction has an annular engagement protrusion 49 on the outer peripheral surface. It is of the type configured as an insertion end 81. Here, the one-side annular surface in the axial direction of the annular engagement protrusion 49 is formed in a tapered shape whose diameter increases toward the other side in the axial direction. The pipe body 47 advances relatively while the annular surface on the one side in the axial direction of the annular engaging projection 49 pushes the space between the arm main body portions 67 and 67 of the wire retainer 5 (the imaginary of the engaging arm 59 in FIG. 7). The quick connector 1 or the connector housing 3 until the insertion end 81 is inserted into the pipe insertion portion 9 of the connector housing 3 over the entire length. It is pushed into. The other annular surface 82 in the axial direction of the annular engagement projection 49 is formed so as to expand in the radial direction or the direction perpendicular to the axis. The one annular surface in the axial direction of the annular engagement projection 49 is received by the bush 43. When it abuts on the inner peripheral surface of the portion 51, it is coincident with or substantially coincides with the axial one end 83 of the engagement slit 23 in the axial position, so that the arm body portions 67 and 67 of the wire retainer 5 When the connector housing 3 is normally inserted into the pipe insertion portion 9, it is returned to the parallel state in a snap-like manner by the elastic return force, and the annular engagement protrusion 49 or the annular engagement so as to prevent the pipe body 47 from coming off. Snap-engage with the axially other annular surface 82 of the mating protrusion 49. Since the width of the engagement slit 23 is set wider than the diameter of the arm main body 67 (10% to 25% increase in the diameter of the arm main body 67), the snap action of the arm main body 67 is sharp and the retaining is prevented. The engaging portions 68, 68 collide with the retaining wall portion 37 of the connector housing 3 to generate a clear collision sound. Here, the arm main body 67 is not configured to collide with the outer periphery of the pipe body 47, but the arm main body 67 may collide with the pipe body 47 to generate a collision sound.

  One end in the axial direction of the insertion end 81 of the pipe body 47 passes through the O-ring 41 and reaches the inside of the pipe support portion 17, and the pipe body 47 or the insertion end 81 of the pipe body 47 and the quick connector 1 or connector housing. 3 is sealed by an O-ring 41, and one side in the axial direction of the annular engagement protrusion 49 of the insertion end 81 of the pipe body 41 is loosened in the radial direction by the pipe support 17 and the bush 43. It is supported so that it does not occur. It should be noted that the annular engagement protrusion 49 of the pipe body 47 is snap-engaged with the engagement arms 59 and 59 or the arm body portions 67 and 67, and the snap operation of the engagement arm 59 or the arm body portion 67 is performed. When the annular surface of one side in the axial direction of the annular engagement projection 49 is accommodated in the bush 43 so that the sliding does not become dull due to sliding with the annular engagement projection 49, the other side in the axial direction of the annular engagement projection 49 You may comprise so that an annular surface may be located in the one axial direction a little rather than the axial direction one end 83 of the engagement slit 23. FIG.

  FIG. 8 is a view for explaining a method of operating the wire retainer 5 of the quick connector 1.

  When the pipe body 47 is detached from the quick connector 1, for example, a finger is put on the finger-holding portion 63 of the wire retainer 5 held at the attachment position (position shown in FIG. 7) to apply a pulling force (retraction force). (See arrow A in FIG. 7). Then, the wire retainer 5 slides the engagement main body 69 of each engagement arm 59 toward the other slit portion 27 on the outer surface of the retaining wall portion 37 on the other circumferential side of the mounting projection 21. The engaging arms 59 and 59 gradually open while moving in the retracting direction. When the wire retainer 5 continues to be pulled, the arm main body portion 67 abuts against the dividing portion 29 and is strongly pressed, and the wire retainer 5 can be moved in the retracting direction beyond the position (the retracted position shown in FIG. 8). In this state (retracted state), the engagement arms 59 and 59 are open to the extent that the annular engagement protrusion 49 of the pipe body 47 can pass through. Here, the axial portion 71 is formed so as to be slightly lifted from the outer surface of the retaining wall portion 37 on the other circumferential side of the mounting projection 21 (more specifically, the bending of the axial portion 71). The starting end may contact, engage and slide with the outer surface of the retaining wall portion 37), and the entire axial portion 71 may slide on the outer surface of the retaining wall portion 37.

  Further, in this retracted state, the distal end of the engagement main body 69 of the retaining engagement portion 68 is in a state where it comes off from the retaining wall portion 37 and falls into the other side slit portion 27. The other side entrance / exit 39 is, for example, partially blocked by the outer peripheral surface or the outer surface of the closed portion 53 of the bush 43, so that the axial portion 71 does not enter the connector housing 3. The direction portion 71 (the bending start end or the bending start end side of the axial direction portion 71) is related to the other end in the circumferential direction of the other side entrance / exit 39 of the other side slit portion 27 or the other end in the circumferential direction of the other side slit portion 27 in the mounting direction. (Axial direction part 71 inclines outward toward the tip, for example). Therefore, even if the retracting force is released from the wire retainer 5, the wire retainer 5 is held in the retracted state. In order to return the retracted wire retainer 5 to the attachment position, the wire retainer 5 is pushed strongly in the attachment direction, and the axial direction portion 71 of the retaining engagement portion 68 is moved to the other side slit portion 27 and the other side entrance / exit 39. Alternatively, the retaining wall portion 37 is pushed out from the other side slit portion 27 on the outer surface or in the direction. Alternatively, the axial direction portion 71 is moved outward, and the tip of the engaging portion main body 69 of the retaining engagement portion 68 is pushed out from the other side slit portion 27 onto the outer surface of the retaining wall portion 37. The wire retainer 5 moves smoothly to the attachment position by the elastic return force of the engagement arms 59, 59 trying to return in parallel.

  The quick connector of the present invention ensures the speed of connection work by being applied to a super heat-resistant air hose in automobile piping or the like.

1 is a perspective view of a quick connector according to the present invention. It is sectional drawing of a quick connector. It is another sectional view of a quick connector. It is a disassembled perspective view of a quick connector. It is an assembly drawing of a quick connector. It is sectional drawing along the axial direction which shows the state which connected the rubber-made hose and the pipe body to the quick connector. It is sectional drawing along the radial direction which shows the state which connected the pipe body to the quick connector. It is a figure for demonstrating the operation method of the wire retainer of a quick connector.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Quick connector 3 Connector housing 5 Wire retainer 7 Hose connection part 23 Engagement slit 47 Pipe body 49 Annular engagement protrusion 59 Engagement arm 81 Insertion end part 82 Axial other side annular surface

Claims (4)

A cylindrical connector housing having a connecting portion connected to the hose formed on one side in the axial direction and a pair of engaging slits formed opposite to each other in the radial direction on the other side in the axial direction, and a pair of engaging arms The pair of engagement arms enter the engagement slit and sandwich the connector housing so that the U-shaped or substantially U-shaped wire retainer is attached to the other axial side of the connector housing. And the engagement arm of the wire retainer protrudes into the connector housing from the engagement slit and is formed in the insertion end when the insertion end of the pipe body is inserted. A quick connector that is pushed by the engaging protrusion and opens and closes to engage with the annular engaging protrusion,
Each of the engagement slits has a width larger than the diameter of the engagement arm so as to collide with the connector housing or the pipe body and generate a collision sound when the engagement arm completes the closing operation. A quick connector characterized by   The quick connector according to claim 1, wherein each of the engagement slits has a width that is 1.1 to 1.3 times the diameter of the engagement arm.   The insertion end of the pipe body is configured so that it can be inserted into the connector housing until an annular surface on the other axial side of the annular engagement protrusion coincides with at least one axial end of the engagement slit. The quick connector according to claim 1, wherein the quick connector is provided.   The quick connector according to claim 1, 2 or 3, wherein the wire retainer is made of metal, and the connector housing and / or the pipe body is also made of metal.

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