JP2007255668A - Quick connector - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a quick connector capable of surely preventing a retainer from coming out from a retainer retention part to an axis perpendicular direction outward even if engagement of an engagement claw preventing movement of the retainer in a push-in direction of an axis perpendicular direction and a corresponding retainer retention part side engagement part is released by insertion of a mating pipe. <P>SOLUTION: In the quick connector including a cylindrical connector main body 16, and the retainer 18 installed in the retainer retention part 22 in the axis perpendicular direction and enabling the mating pipe 10 to be inserted in a connector housing 24 to an insertion completion position at an axis perpendicular direction retreat position and locking the mating pipe under a coming out prevention condition at an axis perpendicular direction press in position, the retainer 18 is provided with a base part 42, a coming out prevention leg 44, a claw 48, a cam part 64 for engagement release, and a claw 66 preventing the retainer 18 from coming out to the axis perpendicular direction outward. The claw 66 is provided on an end part of the coming out prevention leg and is provided with a corresponding engagement part 70 on the retainer retention part 22 side. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a quick connector capable of quickly connecting a piping tube and a mating pipe.

Conventionally, a quick connector has been widely used as a connecting device for connecting a piping tube to a mating pipe.
Various types and forms of this quick connector are known, and one of them is a pipe tube connection on one side in the axial direction and a connector housing on the other side. With the retainer mounted in the retainer holding part of the cylindrical connector body in the direction perpendicular to the axis, and the retainer positioned in the retracted position in the direction perpendicular to the axis, the mating pipe can be inserted to the connection position (insertion completion position). In addition, there is known a structure in which the mating pipe is locked in the removal-prevented state in a state where the retainer is located at the push-in position which is the fitting completion position in the direction perpendicular to the axis.

For example, Patent Document 1 below discloses this type of quick connector.
FIG. 19 shows a specific example thereof.
In the figure, reference numeral 200 denotes a mating pipe to which a piping tube is connected, and a hook-like portion 202 is provided on the outer peripheral surface at a position away from the tip by a ring shape.
Reference numeral 204 denotes a quick connector. The quick connector 204 includes a cylindrical connector main body 206 and a retainer 208 that prevents the mating pipe 200 from being pulled out.
The connector main body 206 has a connecting portion 209 for connecting with a tube for piping on one side in the axial direction, and a connector housing 212 provided with a retainer holding portion 210 on the other side.
The connector main body 206 has an opening 214 for inserting the mating pipe 200 at the shaft end.

  The retainer 208 is attached to the retainer holding portion 210 of the connector body 206 in the direction perpendicular to the axis, and allows the mating pipe 200 to be inserted into the connector housing 212 to the connection position at the retracted position in the direction perpendicular to the axis. The retainer 208 locks the mating pipe 200 in the retaining state at the pushing position in the direction, that is, the fitting completion position. The retainer 208 includes a base 216, a pair of retaining legs 218 extending from the base 216 in a direction perpendicular to the axis, and a base And a pair of elastic legs 220 extending from 216 in the same direction as the retaining legs 218.

Here, the pair of elastic legs 220 can be expanded and contracted in a direction perpendicular to the axis, that is, elastically deformable in a direction approaching or separating from each other.
Claws 222 projecting inwardly in the direction perpendicular to the axis are provided at the distal ends of the pair of elastic legs 220. In addition, these claws 222 are provided with cam portions (latching release portions) 224.

The quick connector 204 connects the piping tube and the mating pipe 200 as follows.
The retainer 208 is attached to the retainer holding portion 210 of the connector main body 206 in the direction perpendicular to the axis, and is held in the retracted position in the axis perpendicular direction in the retainer holding portion 210 before the mating pipe 200 is inserted.

At this time, the inward claw 222 of the retainer 208 is in a state of being latched with any of the first latching portion 226 and the third latching portion 228 provided in the retainer holding portion 210, and is downward in the figure. In addition, the movement is restricted in the upward direction.
In other words, the retainer 208 is prevented from moving downward by the hook of the claw 222 with respect to the first hooking portion 226, that is, moving toward the push-in position that is the fitting completion position, and the retainer 208 is moved to the third hooking portion 228. Due to the latching, the upward movement, that is, the movement of the retainer holding part 210 in the direction perpendicular to the axis is also prevented.

In this state, the mating pipe 200 is inserted into the connector housing 212 through the opening 214 to the connection position (at this time, the retaining leg 218 of the retainer 208 allows the hook-shaped portion 202 of the mating pipe 200 to pass).
Thus, when the mating pipe 200 is inserted to the connection position, the cam portion 224 provided in the claw 222 in the process is placed on the front surface of the hook-shaped portion 202 of the mating pipe 200 (the surface in the insertion direction side indicated by P in the figure). The pair of elastic legs 220 are pushed and opened by a cam action, and the hooks of the claws 222 and the first hooking portions 226 are released. At this time, the hooking of the claw 222 and the third hooking portion 228 is also released at the same time.
In this state, the retainer 208 can be pushed downward.
Therefore, when the retainer 208 is pushed downward and pushed in at the push-in position which is the fitting completion position, the pair of retaining legs 218 come into contact with the rear surface of the hook-like portion 202 of the mating pipe 200, and the mating pipe Prevents 200 from falling out. That is, the mating pipe 200 is locked from the connector main body 206 in a state of being prevented from being pulled out.
In this pushing position, the claw 222 of the retainer 208 is hooked on the second hooking portion 230 of the retainer holding portion 210, and the retainer 208 is held at the pushing position.

  However, in this quick connector 204, the claw 222 of the retainer 208 not only functions as a first latching claw with respect to the first latching portion 226 of the retainer holding portion 210 in the retracted position in the direction perpendicular to the axis, but also the third latching portion 228. Since the retainer 208 can prevent the retainer 208 from coming out of the retainer holding portion 210 outward in the direction perpendicular to the axis before the mating pipe 200 is inserted, the mating pipe 200 can also be used. When the hook-shaped portion 202 pushes and opens the pair of elastic legs 220 by the cam action of the cam portion 224 of the claw 222, the hook of the claw 222 with respect to the third hook portion 230 is released. If a tensile force in the direction perpendicular to the axis acts on the retainer 208 in this state, the retainer 208 is disengaged from the retainer holding portion 210. Cause the problem.

JP 2004-251319 A

  The present invention is based on the above circumstances, and even when the latching between the first latching claw on the retainer side and the first latching part on the retainer holding unit side is released by inserting the mating pipe, the retainer is released. The purpose of the present invention is to provide a quick connector that can reliably prevent the retainer from being pulled out of the retainer holding portion in the direction perpendicular to the axis.

  Thus, according to the first aspect of the present invention, (A) a tubular shape having a connector housing having a pipe connecting portion on one side in the axial direction and a retainer holding portion on the other side in the axial direction. A connector main body, and (B) a mating pipe that is mounted in a direction perpendicular to the axis with respect to the retainer holding part and has a hook-like part protruding in an annular shape on the outer peripheral surface at the retracted position in the direction perpendicular to the axis. And a retainer that locks the mating pipe in a retaining state at a push-in position that is a fitting completion position in a direction perpendicular to the axis, and the retainer includes (a) a base portion. (B) a retaining leg that extends in a direction perpendicular to the axis from the base and prevents the mating pipe from coming off by contacting the rear surface of the retainer at the pushing position opposite to the insertion side of the hook-shaped portion of the mating pipe. And (c) the retaining leg from the base A pair of elastic legs extending in the same direction, and (d) provided at each end of the pair of elastic legs, and in a retracted position of the retainer, with respect to a first latching portion provided in the retainer holding portion A first latching claw that latches in the pushing direction of the retainer and prevents movement of the retainer in the pushing direction; and (e) a second latching portion provided in the retainer holding portion at the pushing position. A second latching claw that latches the retainer in the retracting direction and prevents the retainer from moving toward the retracted position, and (f) abuts the front surface of the hook-shaped portion when the mating pipe is inserted. A latch releasing portion that contacts and elastically deforms the elastic leg in a direction in which the first latching claw releases the latch with respect to the first latching portion, and allows the retainer to move in the pushing direction; (g) At the retracted position of the retainer, the retainer holding portion is provided with respect to a third latching portion. A quick connector comprising a third latching pawl for latching the retainer in a direction perpendicular to the axial direction and preventing the retainer from being pulled out, wherein the third latching pawl is attached to the retaining leg. In addition to being provided at the end, the third hooking portion is provided in the retainer holding portion at a position corresponding to the third hooking claw.

  According to a second aspect of the present invention, in the first aspect, the retainer holding portion is provided with a penetrating window portion that allows the retaining leg to be inserted into the retainer holding portion in a direction perpendicular to the axis. The latching claw is provided in a form projecting in the axial direction, and a part of the edge of the window portion on the projecting side of the third latching claw is configured as the third latching part. And

  According to a third aspect of the present invention, in the second aspect, the retaining leg is an elastic leg having elasticity in the axial direction, and the window portion has a side opposite to a protruding side of the third latching claw. An elastic deformation space of the retaining leg is formed in which the retaining leg is inserted into the retainer holding portion by elastically deforming the retaining leg in the axial direction.

  According to a fourth aspect of the present invention, in the third aspect of the present invention, when the third latching claw is inserted into the window portion in the direction perpendicular to the axis, the retaining leg is cammed by contact with an edge portion of the window portion. A cam portion that is elastically deformed in a direction opposite to a protruding direction of the third latching claw is provided.

Effects and effects of the invention

  As described above, when the mating pipe is completely inserted, the retainer comes off from the retainer holding portion because the third hooking claw that prevents the retainer from coming off in the direction perpendicular to the axis is attached to the first hooking portion. This is caused by being provided on the side of the elastic leg provided with the first hooking pawl to be hooked.

  Here, in the present invention, a third latching claw for preventing the retainer from coming off is provided on the side of the retaining leg, and the present invention prevents the retaining leg from being deformed by the mating pipe when the mating pipe is inserted. In particular, the retaining leg is provided with a third latching claw for preventing it from coming off. According to the present invention, the first retainer can be pushed to the pushing position when the mating pipe is completely inserted. Even when the latching claw is released from the first latching portion, the third latching claw is not released from the third latching portion, so the retainer is inserted to the pushing position. On the other hand, it is possible to reliably prevent slipping in the opposite direction.

Here, the pair of elastic legs can be elastically expanded or contracted in a direction perpendicular to the axis in a direction approaching or separating from each other.
In this case, the first latching claw and the second latching claw are formed so as to protrude in a direction perpendicular to the axis, and the first and second latching portions are formed as the first latching claw and the second latching claw. It can be provided in a direction corresponding to the nail.
Moreover, the said latch release part can be comprised by the cam part which expands an elastic leg by a cam action by contact | abutting to the front surface of the said hook-shaped part.

  In the present invention, the retainer retaining portion is provided with a penetrating window portion for inserting the retaining leg of the retainer into the retainer retaining portion in the direction perpendicular to the axis, and the third latching claw is provided in a form protruding in the axial direction. A part of the edge on the protruding side of the third latching claw can be configured as the third latching portion (claim 2).

Although it is possible to provide the third hooking claw in a form protruding in the direction perpendicular to the axis, in this case, if a corresponding third hooking part is provided on the retainer holding part side, the structure becomes complicated. End up.
However, by providing the third latching claw in a form protruding in the axial direction, a part of the edge of the penetrating window part for inserting the retaining leg into the retainer holding part is used as the third latching part. It is possible to easily configure, and there is no problem that the structure is particularly complicated because the third hooking portion is provided.

In this case, the retaining leg is an elastic leg having elasticity in the axial direction, and the retaining leg is made to be elastic in the axial direction on the opposite side of the window portion from the protruding side of the third latching claw. An elastic deformation space of the retaining leg to be inserted into the retainer holding part can be formed (claim 3).
If it does in this way, the 3rd latching claw provided in the retaining leg can be easily inserted through the window part and the retainer holding part.

Further, in this case, the third latching claw is provided with a cam portion that elastically deforms the retaining leg in a direction opposite to the protruding direction of the third latching claw by a cam action by contact with the edge of the window portion. (Claim 4).
If it does in this way, it will become possible to insert the 3rd latching claw and the retaining leg which provided this more easily into the inside of a retainer holding part through a window part.

Next, embodiments of the present invention will be described in detail with reference to the drawings.
1 to 4, reference numeral 10 denotes a metal or resin mating pipe (here, resin) to which a piping tube (hereinafter simply referred to as a tube) is to be connected, on the outer peripheral surface at a predetermined distance from the tip. It has a hook-like portion 12 projecting annularly.
Reference numeral 14 denotes a quick connector (made of resin here), which has a connector main body 16 and a retainer 18.
The connector body 16 has a tubular shape and an elbow shape as a whole, a connector having a nipple portion 20 as a tube connecting portion on one side in the axial direction and a retainer holding portion 22 on the other side. A housing 24 is provided.

On the outer peripheral surface of the nipple portion 20, a plurality of annular protrusions 26 having a sawtooth cross section along the axial direction and an acute angle at the tip are provided.
These annular protrusions 26 bite into the inner surface of the tube when the nipple portion 20 is press-fitted into the tube to prevent the tube from being pulled out.
At the base of the nipple portion 20, a flange portion 28 that defines the amount of press-fitting of the nipple portion 20 into the tube is provided.
On the other hand, the connector housing 24 is provided with an opening 30 at the shaft end (left end in the figure), and a pair of O-rings 32 as a seal ring are held therein together with an intermediate ring 34 and a bush 36 made of resin. .
These O-rings 32 are in elastic contact with the outer peripheral surface of the mating pipe 10 inserted into the connector housing 24 and hermetically seal between the connector housing 24 and the mating pipe 10.

The retainer holding portion 22 is provided with a pair of flange portions 38, and a fitting groove 40 is formed between the pair of flange portions 38, and the retainer 18 is mounted and held therein.
The mating pipe 10 is inserted into the connector housing 24 up to the connection position, and is retained by the retainer 18 in that state.

  In detail, the mating pipe 10 is inserted to a position where the flange portion 12 abuts against the shaft end surface (left end surface in the figure) of the bush 36 held inside the connector housing 24, and in this state, a later-described retaining leg 44 in the retainer 18 is provided. By coming into contact with the rear surface (left surface in the figure) opposite to the insertion side of the bowl-shaped portion 12, the retaining leg 44 prevents the leftward direction in the figure from coming off.

9 and 10 show the configuration of the retainer 18 in detail.
As shown in the drawing, the retainer 18 is a member having a substantially portal shape as a whole, and includes a base portion 42, a pair of retaining legs 44 extending in a direction perpendicular to the axis from the base portion 42, and a base portion outside the retaining legs 44. A pair of elastic legs 46 extending from 42 in the same direction as the retaining legs 44 are provided.
Here, as shown in FIG. 2 (B), the pair of retaining legs 44 is configured so that the retainer 18 is pushed in the retainer holding portion 22 in the direction perpendicular to the axis to the pushing position (insertion completion position). It contacts the rear surface of the hook-shaped portion 12 and prevents the mating pipe 10 from being removed from the connector housing 24.
On the other hand, the pair of elastic legs 46 are portions that elastically hold the retainer holding portion 22 from the outer peripheral surface, and elastically expand or contract in a direction perpendicular to the axis in a direction approaching or separating from each other. It is possible.
Claws 48 projecting inward from each other are integrally formed at the ends of the pair of elastic legs 46.

4 to 7 show a state in which the retainer 18 is attached to the retainer holding portion 22 in the direction perpendicular to the axis, and the retainer 18 is positioned in the retracted position in the direction perpendicular to the axis.
As shown in these drawings, the retainer 18 has a hook portion (first hook) provided on the retainer holding portion 22 with a claw 48 provided at each end portion of the pair of elastic legs 46 in the retracted position. The retaining portion 50 is retained in a state in which the pushing movement is prevented by being hooked in the pushing direction of the retainer 42. In other words, the retainer holding portion 22 holds the retainer 22 in a state where the downward pushing in the drawing is prevented.
The claws 48 are also hooked upward in the drawing with respect to the latching portion (third latching portion) 52 of the retainer holding portion 22, and the retainer acts by the latching action of the pawl 48 on the latching portion 52. 18 is prevented from coming out upward in the drawing, that is, outward from the retainer holding portion 22 in the direction perpendicular to the axis.

That is, in this embodiment, the claw 48 has a function as a first latching claw and a function as a third latching claw.
However, in this embodiment, the claw 48 may be configured not to have a function as a third latching claw. That is, the claw 48 can be left without a function as a claw for preventing the retainer 18 from coming off.
In addition, these latching | locking parts 50 and 52 in the retainer holding | maintenance part 22 are comprised by the edge part of the penetration window part 54 by which the front shape was formed in bowl shape as shown in FIG.

  On the other hand, FIG. 8 shows a state in which the retainer 18 is pushed to the pushing position in a direction perpendicular to the axis. At this time, the respective claws 48 of the pair of elastic legs 46 in the retainer 18 are hooks provided on the retainer holding portion 22. The locking portion (second locking portion) 56 is hooked upward in the drawing, that is, toward the retracted position, and the retaining action prevents the retainer 18 from moving toward the retracted position. That is, the retainer 18 is held at the pushing position which is the fitting completion position by the latching action of the claw 48 on the latching portion 56.

Thus, in this embodiment, the 1st latching claw 50 which prevents the retainer 18 from moving from a retreating position to a pushing position, and the 2nd latching which prevents the movement from the pushing position of the retainer 18 toward a retreating position. A claw 56 and a third hooking claw 52 for preventing the retainer 18 from coming off in the direction perpendicular to the axis at the retracted position are integrally formed with the claw 48.
However, as described above, the function as the third latching pawl 52 for preventing the removal can be eliminated in the present embodiment.

  When the retainer 18 in the retracted position is pushed to the pushing position, the guide action of the cam portion 58 provided on the lower surface of the claw 48 (see FIG. 9) and the guide portion 60 provided on the retainer holding portion 22 (see FIG. 7). Thus, the claw 48 smoothly slides on the guide surface 62 of the guide portion 60, and the retainer 18 slides to the pushing position while maintaining the pair of elastic legs 46 in the expanded state.

Here, the front surface of the guide surface 62 of the guide portion 60 has a mountain shape, and the upper portion and the lower portion of the guide surface 62 are curved or inclined in opposite directions with the apex portion P as a boundary.
The pair of guide surfaces 62 are formed into surfaces that approach each other as the portion above the top portion P moves upward from the top portion P, and surfaces that approach each other as the lower portion moves away from the top portion P downward in the figure. ing.

  Therefore, when the retainer 18 is pushed from the retracted position to the pushed-in position, the retainer 18 moves downward in the figure while pushing the pair of elastic legs 46 until the claw 48 reaches the top portion P, and the inflection point P is changed. After that, the pair of elastic legs 46 are moved downward while contracting each other in the opposite direction.

  Therefore, when the retainer 18 is pushed downward in the drawing, the retainer 18 tries to return toward the retracted position by the action of the guide surface 62 and the elastic contraction action of the pair of elastic legs 46 until the pawl 48 reaches the top portion P. After the claw 48 gets over the top portion P, the retainer 18 naturally moves to the pushing position by the spring force by the action of the guide surface 62 and the elastic contraction action of the pair of elastic legs 46.

As shown in detail in FIGS. 9 and 10, the claw 48 is also provided with a cam portion (latching release portion) 64 on the front surface (left surface in the drawing).
When the mating pipe 10 is inserted in a state where the retainer 18 is in the retracted position shown in FIGS. 4 to 7, the cam portion 64 comes into contact with the front surface of the flange-shaped portion 12 of the mating pipe 10 and a pair of cam portions 64 are camped. The elastic leg 46 is pushed open to release the hook of the pawl 48 from the hook portion 50 (at this time, the hook of the hook 48 is also released from the hook portion 52 at the same time). It becomes possible to push in the middle and downward, that is, to the pushing position.

As shown in FIG. 9, in this embodiment, the claws 66 are also provided at the ends of the pair of retaining legs 44.
The claw 66 serves as a third latching claw for preventing the retainer 18 in the retracted position from slipping out in the direction perpendicular to the axis.
Specifically, in the case of this embodiment, as shown in FIG. 5, the claw 66 is hooked on the hook portion (third hook portion) 70 provided on the retainer holding portion 22 in a state where the retainer 18 is in the retracted position. By stopping, the retainer 18 is prevented from coming off in the direction perpendicular to the axis.

In this retracted position, when the mating pipe 10 is inserted into the connector housing 24, the pair of elastic legs 46 are cammed by the contact of the cam portion 64 with the hook-shaped portion 12 at the claw 48 provided at the end thereof. And the hook of the claw 48 on the hook 50 is released.
Therefore, if the pawls 66 are not provided on the pair of retaining legs 44, the retainer 18 can be extracted outward in the direction perpendicular to the axis in this state.
However, in this embodiment, the pair of retaining legs 44 that are not deformed by the hook-shaped portion 12 of the mating pipe 10 are provided with claws 66 for retaining the retainer 18 outward in the direction perpendicular to the axis. Even when the mating pipe 10 is inserted into the connector housing 24, the retainer 18 does not come out outward in the direction perpendicular to the axis, and only movement in the pushing direction is allowed.

As shown in FIG. 9, in this embodiment, the claw 66 of the retaining leg 44 is provided so as to protrude in the axial direction (left direction in FIGS. 5 and 6).
As shown in FIG. 6, the retaining portion 70 on the retainer retaining portion 22 side for retaining the claw 66 is an edge portion of a penetrating window portion 72 provided in the retainer retaining portion 22 (see FIGS. 12 and 13). ).
Here, the latching portion 70 is formed in a flat shape corresponding to the flat shape of the upper surface of the claw 66.
The window portion 72 becomes an insertion window portion of the pair of retaining legs 44 when the retainer 18 is attached to the retainer holding portion 22 in the direction perpendicular to the axis. The claws 66 of the retaining legs 44 are provided with the window portions 72. It passes through and is inserted into the retainer holding part 22.
At this time, the retaining leg 44 elastically deforms in the axial direction (rightward in the figure) as shown in FIG.
In order to smoothly pass the claw 66 to the window portion 72, the claw 66 is provided with a cam portion 68 on the left surface in FIG.

  When the claw 66 passes through the window portion 72, the cam portion 68 is brought into contact with the edge portion of the window portion 72, and the retaining leg 44 is elastically deformed rightward in FIG. 16 by the cam action of the cam portion 68 at that time. Thus, it can smoothly pass through the window portion 72 and enter the retainer holding portion 22.

Thus, in the retaining leg 44, the window portion 72 has a wide portion 74 (see FIG. 11B), and an elastic deformation space is secured on the rear side (right side in the drawing) of the claw 66. When inserted into the window portion 72, it can be smoothly elastically deformed in the same direction, and the claw 66 can be inserted through the window portion 72 into the inside.
Thus, the claw 66 inserted into the retainer holding portion 22 through the window portion 72 is in a state of being hooked to the hook portion 70 by the elastic restoring force of the retaining leg 44 at that time.

14 to 18 show the mounting procedure of the retainer 18 and the operation of the retainer 18 in this embodiment.
As shown in FIGS. 14 and 15, in this embodiment, the retainer 18 is fitted and attached to the retainer holding portion 22 in a direction perpendicular to the axis. At this time, the pair of elastic legs 46 is inserted into the retainer holding part 22 from the window part 54 of FIGS. 5, 6, 11 and 13, and the pair of retaining legs 44 is inserted into the window part 72 of the retainer holding part 22. Insert into it from inside.
At this time, as shown in FIG. 16, the pair of retaining legs 44 moves from the window portion 72 to the retainer holding portion 22 based on the action of the cam portion 68 provided on the claw 66 and the elastic deformation of the retaining leg 44 in the axial direction. Inserted inside.
The retainer 18 attached to the retainer holding part 22 in this way is initially held in the retracted position as shown in FIG.
In this retracted position, the retainer 18 is prevented from moving both in the pushing direction perpendicular to the axis and in the upward pulling direction in the figure.

  When the mating pipe 10 is inserted into the connector housing 24 in this state, the pair of elastic legs 46 is brought into contact with the cam portion 64 of the hook 48 of the mating pipe 10 and the claws 48 of the pair of elastic legs 46. It expands elastically, and the mating pipe 10 can be inserted deeper, more specifically, to a position where it abuts against the shaft end surface of the bush 36 held inside the connector housing 24 (up to the connection position). That is, the mating pipe 10 can be further inserted to the connection position (FIG. 17 (II)).

Thus, when the mating pipe 10 is inserted to the connection position, as shown in FIG. 18, the retainer in the retracted position is pushed in the direction perpendicular to the axis (FIG. 18 (III)), and the fitting completion position is reached. It is located at the pushing position.
In this state, the pair of retaining legs 44 comes into contact with the rear surface of the flange-shaped portion 12 of the mating pipe 10 so that the mating pipe 10 is prevented from coming off from the connector housing 24 (FIG. 18 (IV)). .

According to the present embodiment as described above, when the pawl 48 of the elastic leg 46 is released from the hook 50 so that the retainer 18 can be pushed to the pushing position when the mating pipe 10 is completely inserted. In this case, the claw 66 of the retaining leg 44 is held by the latching portion 70 in a latched state.
Therefore, while the retainer 18 can be pushed to the pushing position, it is possible to reliably prevent the retainer 18 from coming off in the opposite direction.

  Further, in this embodiment, the claw 66 of the retaining leg 44 is provided in a state of protruding in the axial direction, and the claw 66 of the through window 72 for inserting the retaining leg 44 into the retainer holding part 22 in the direction perpendicular to the axis. Since a part of the edge portion on the protruding side is configured as the latching portion 70, the latching portion 70 can be easily configured, and the structure is particularly complicated because the latching portion 70 is provided. There is no problem.

  Further, since the wide portion 74 as an elastic deformation space of the retaining leg 44 is formed in the window portion 72, the claw 66 provided on the retaining leg 44 can easily pass through the window portion 72 and enter the retainer holding portion 22. Can be inserted.

  Further, in this case, the claw 66 is provided with a cam portion 68 that elastically deforms the retaining leg 44 in a direction opposite to the protruding direction of the claw 66 by a cam action by contact with the edge portion of the window portion 72. The claw 66 and the retaining leg 44 provided with the claw 66 can be easily inserted into the retainer holding part 22 through the window part 72.

Although the embodiment of the present invention has been described in detail above, this is merely an example.
For example, in the above embodiment, the retainer 18 is held by the retainer holding portion 22 so as to hold the outer peripheral surface of the retainer holding portion 22 by the pair of elastic legs 46. However, the present invention is a pair of elastic legs. Can be applied to a quick connector that is inserted into the retainer holding portion, i.e., into the connector housing and pushed in the direction perpendicular to the axis along the inner peripheral wall, and held in the pushed position. Further, in some cases, the present invention can be applied to a quick connector in which a pair of elastic legs is elastically deformed in the axial direction and the retainer is pushed in a direction perpendicular to the axis and held in the pushed position. The present invention can be configured in various modifications without departing from the scope of the invention.

It is a perspective view which shows the quick connector of one Embodiment of this invention in the connection state with the other party pipe. It is a figure which cuts and shows a part of quick connector of FIG. It is a perspective view which shows the quick connector in the embodiment in the state before a connection with an other party pipe. It is a figure which cuts and shows a part of FIG. It is a perspective view which shows the state which kept the retainer in the retracted position in the same embodiment. It is a figure which shows the state before retainer mounting | wearing in the same embodiment. FIG. 6 is a partially cutaway view showing a state of the elastic leg and the retaining leg when the retainer is held at the retracted position in the same embodiment. FIG. 6 is a partially cutaway view showing a state of the elastic leg and the retaining leg at the retainer pushing position in the same embodiment. It is a perspective view of the single item of the retainer in the embodiment. FIG. 10 is a front view, a rear view, and a side view of the retainer of FIG. 9. It is a figure of the connector main body in the embodiment. It is a front view of the connector main body of FIG. It is the perspective view which looked at the connector main body of FIG. 11 from the downward direction. It is operation | movement explanatory drawing of the embodiment. FIG. 15 is an operation explanatory diagram following FIG. 14. It is action explanatory drawing at the time of insertion of the retaining leg in the same embodiment. FIG. 16 is an operation explanatory diagram following FIG. 15. FIG. 18 is an operation explanatory diagram following FIG. 17. It is a figure of the conventional quick connector.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Opposite pipe 12 Cage-like part 14 Quick connector 16 Connector main body 18 Retainer 20 Nipple part 22 Retainer holding part 24 Connector housing 42 Base 44 Stopping leg 46 Elastic leg 48, 66 Claw 50 Hook part (1st hook part)
52 Hook (third hook)
54, 72 Window 56 Hook (second hook)
58, 68 Cam part 64 Cam part (Latch release part)
70 Hanging part 74 Wide part

Claims (4)

(A) A cylindrical connector body having a connector housing having a tube connecting portion on one side in the axial direction and a retainer holding portion on the other side in the axial direction, and (B) the retainer holding The mating pipe is attached to the connector housing in a direction perpendicular to the axis and has a hook-shaped portion projecting annularly on the outer peripheral surface at the retracted position in the direction perpendicular to the axis. A retainer that locks the mating pipe in a locked-out state at a push-in position that is a fitting completion position in a direction perpendicular to the axis, and the retainer includes (a) a base, and (b) a direction perpendicular to the axis from the base. A retaining leg that abuts against the rear surface opposite to the insertion side of the hook-shaped portion of the mating pipe at the pushing position of the retainer and prevents the mating pipe from coming off; and (c) the retaining leg from the base portion. A pair extending in the same direction as the legs An elastic leg, and (d) provided at each end of the pair of elastic legs, and in a retracted position of the retainer, is hooked in a pushing direction of the retainer with respect to a first hooking portion provided in the retainer holding portion. A first latching claw that stops and prevents movement of the retainer in the pushing direction; and (e) is hooked in the retracting direction of the retainer with respect to a second latching portion provided in the retainer holding portion at the pushing position. A second latching claw for stopping the retainer from moving toward the retracted position, and (f) abutting against the front surface of the hook-shaped portion when the mating pipe is inserted, A latch releasing portion that elastically deforms the first latching pawl in a direction to release the latch with respect to the first latching portion, and allows the retainer to move in the pushing direction; and (g) the retracting of the retainer. In the direction perpendicular to the axis of the retainer with respect to the third latching portion provided on the retainer holding portion. A third pawl dropout and engaging in the direction of preventing the withdrawal of the retainer, the quick connector comprising provided with,
The quick connector characterized in that the third hooking claw is provided at an end of the retaining leg, and the third hooking part is provided in the retainer holding part at a position corresponding to the third hooking claw. .   In Claim 1, The retainer holding part is provided with a through-window part for inserting the retaining leg into the interior of the retainer holding part in a direction perpendicular to the axis, and the third latching claw is provided in the axial direction. A quick connector provided in a protruding form, wherein a part of an edge of the window portion on the protruding side of the third hooking claw is configured as the third hooking portion.   3. The retaining leg according to claim 2, wherein the retaining leg is an elastic leg having elasticity in the axial direction, and the retaining leg is disposed in the axial direction on the opposite side of the window portion from the protruding side of the third latching claw. A quick connector characterized in that an elastic deformation space of the retaining leg is formed to allow the retaining leg to be inserted into the retainer holding portion by being elastically deformed.   4. The third latching claw according to claim 3, wherein the retaining leg is cammed by abutting against an edge of the window portion when inserted into the window portion in a direction perpendicular to the axis. A quick connector comprising a cam portion that is elastically deformed in a direction opposite to a protruding direction.

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