JPH07260072A - Connector - Google Patents

Abstract

PURPOSE:To facilitate that the male member of a connection is inserted in the female member having a simple structure. CONSTITUTION:In a female member 1, an opening flange 11 is provided on its one end in axial direction together with an annular groove 13 whose inner diameter is larger than its opening 11a, and in a male member 3, an inserting part 30 is provided on its one end in axial direction, and an annular projection 3 is provided on its outer circumference. A C-shaped lock member 4 which is inserted and attached in the annular groove 13 of the female member 1 has an axial direction length which is nearly equal to the length in axial direction between the inner side surface 11b of the opening flange 11 for forming the annular groove 13 on one end and a surface 12 which extends in radial direction facing to the inner side surface 11b, and it has also a C ring shaped large diameter part 41 having an outer diameter which is equal to the inner diameter of the annular groove 13, a C ring shaped small diameter end having an inner diameter which is nearly equal to the outer diameter of the inserting part 30 of the male member 3 on the other end, and a taper wall 42 having a diameter getting smaller from the other end of the C ring shaped large diameter part 41 toward a small diameter end.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a connector for piping for connecting hoses and pipes for transferring fluids such as gasoline, oil, water and air, and more particularly to a connector having a simple structure.

[0002]

2. Description of the Related Art As a connector of this type,
The applicant of the present application has proposed the one described in Japanese Patent No. 64689.

In this connector, as shown in FIGS. 14 to 17, the female member 400 is provided with an opening flange 401 extending in the centripetal direction at one end in the axial direction.
Adjacent to, the ring-shaped recess 402 having a diameter larger than the diameter of the opening 401 of the opening flange 401 is provided.

The ring-shaped recess 40 of the female member 400
2 from the opening flange 401 side, a pair of opposing tables.
A C-shaped locking member 600 having a spring elasticity is inserted with the wall 603, 604 to suppress the rattling in the radial direction and to restrict the movement in the axial direction. The male member 500 is easily inserted by using the locking member 600 having a shape.

More specifically, the C-shaped locking member 600 has a smaller diameter toward the actual direction of the female member 400, is separated from the central engagement protrusion 607, and is capable of expanding its diameter in the ring-shaped recess 402. A pair of arc-shaped taper walls 603, 60
4 and engaging projections 601 and 602 are formed at the ends of the arc-shaped taper walls 603 and 604, respectively.

Here, the engaging protrusions 607, 601, 60
The top surface of 2 and the end surface on the side of the small-diameter end 606 restrict the radial rattling and the axial shifting of the locking member 600 arranged in the ring-shaped recess 402 in the entire axial direction, and always the male member 500. Is designed so that it can be smoothly inserted coaxially with the engaging member 600.

The large diameter end 600 of the C-shaped locking member 600 faces the inner end surface of the opening flange 401 with an inner diameter (D1) larger than the inner diameter of the opening flange 401 of the female member 400, and the small diameter end 606 is The male member 500 has an inner diameter (D2) smaller than the outer diameter of the annular protrusion 50 formed on the outer periphery of the insertion portion 502, and is adapted to engage with the annular protrusion 501.

[0008]

However, as shown in FIG.
As is clear from the above, in order to insert the C-shaped locking member 600 from the opening flange 401 of the female member 400, the notch 401a is formed in the opening flange 401 for inserting the engaging protrusions 601, 602, 607. It is necessary to provide 401b, and the C-shaped locking member 600 is attached to the female member 40.
When inserting from the 0 opening flange 401, the engaging projection 60
It is necessary to fit the notches 1, 602, 603 into the notches 401a, 401b, which makes the insertion work troublesome.

The present invention has been made in view of the above circumstances, and a locking member having a simple structure having a taper wall is provided inward of the opening flange of the female member in the radial direction with respect to the entire length in the axial direction. It can be held without rattling and can be restricted from moving in the axial direction. Moreover, the conventional opening flange does not need a notch, which facilitates the work of inserting the locking member into the female member. An object of the present invention is to provide a connector capable of easily inserting a male member.

[0010]

In order to achieve the above object, the present invention has a first means, which has an opening flange extending in the centripetal direction at one axial end and is provided adjacent to the inside of the opening flange. And a cylindrical female member having an annular groove having an inner diameter larger than the opening diameter of the opening flange, and an insertion portion at one axial end, and the outer peripheral surface of the insertion portion at a predetermined distance from the tip in the centrifugal direction. A tubular male member having a projecting annular protrusion and inserted axially inward from the opening flange side of the female member; and the female member inserted into the annular groove from the opening flange side, And a locking member having a C-shaped spring elasticity for preventing the male part and the male part from coming off, and a predetermined axial length from the inner surface of the opening flange to form the annular groove. A shoulder having a substantially radially extending surface facing the inner surface; Having a C-ring-shaped large-diameter portion engaging member has a substantially equal axial length substantially equal to the outer diameter and the axial direction length to the inner diameter of the annular groove for fitting the annular groove at one end,
A taper wall having a C-ring-shaped small-diameter end having a diameter smaller than the outer diameter of the annular projection of the male member at the other end, and having a smaller diameter from the C-ring-shaped large-diameter portion toward the C-ring-shaped small-diameter end. The connector is characterized by including the following.

The second means has a tubular shape having an opening flange extending in the centripetal direction at one end in the axial direction and an annular groove adjacent to the inside of the opening flange and having an inner diameter larger than the opening diameter of the opening flange. Female member and an insertion portion at one end in the axial direction, and an annular projection protruding in the centrifugal direction at a predetermined distance position from the tip on the outer peripheral surface of the insertion portion, and from the opening flange side of the female member to the shaft. A cylindrical male member inserted inward in the direction,
A member having a C-shaped spring elasticity for preventing the female member and the male portion, which are inserted into the annular groove from the opening flange side, to come off, has one end substantially equal to the inner diameter of the annular groove. A ring-shaped large-diameter end, a C-ring-shaped large-diameter end on the other end coaxially with the C-ring-shaped large-diameter end, and a C-ring-shaped small-diameter end smaller than the diameter of the annular projection of the male member. A taper wall having a small diameter toward the small diameter end, and a projection protruding radially outward from an axial midpoint of the taper wall engaging with the radially extending surface of the shoulder of the female member. A connector integrally provided with a raised portion having an end surface and a top portion extending from the protruding end surface toward the C-ring-shaped large-diameter end and parallel to the axis.

A third means constitutes the connector according to the first means or the second means, characterized in that the shoulder is formed by a step. A fourth means constitutes the connector according to the first means or the second means, characterized in that the shoulder is constituted by a protruding portion protruding inward in the radial direction.

[0013]

[Action]

When the male member is relatively inserted into the female member, the female member is separated from the inner side of the opening flange by a predetermined axial length and faces the inner surface in a substantially radial direction. A C-shaped locking member having a shoulder having a surface extending in the axial direction and having a cutout from one end in the axial direction to the other end is substantially equal to the inner diameter and the axial length of the annular groove fitted in the annular groove on the one end side. Since it has a C-ring-shaped large-diameter portion having an outer diameter and an axial length, the locking member can be reduced in diameter to be freely inserted into the annular groove of the female member, and the opening to the male member. When relatively inserted from the flange side, the C-shaped locking member has its C-ring-shaped large-diameter portion in the annular groove to prevent radial rattling of the entire locking member in the axial direction. Therefore, the C-shaped locking member can always be arranged substantially concentrically in the annular groove, and the male member can be aligned with the female member. The C-shaped locking member forms an annular corner at the boundary between the C-ring-shaped large diameter portion and the taper wall, and this corner is in the radial direction of the shoulder of the female member. Since the inward movement of the C-shaped locking member can be regulated by contacting the extending surface, when the male member is pushed in, the taper wall is forcibly expanded by the annular projection of the male member and the radius is increased. After being deformed outward in the direction, the back surface of the annular projection can be snap-engaged with the C-ring-shaped small-diameter end of the locking member based on the snap action. Thereafter, when the fluid pressure is applied, the male member moves in a direction away from the female member, the large diameter end of the engaging member abuts the inner surface of the opening flange, and the male member and the female member are separated from each other. It can be prevented from coming off.

[0014]

[Operation of Second Means] Since the second means is constructed as described above, when the male member is relatively inserted into the female member, C
The shape-shaped locking member is formed in the annular groove by the top portion extending parallel to the axis from the protruding end surface of the ridge having an end surface protruding from the axial middle of the taper wall toward the C-ring-shaped large diameter end. Radial rattling of the C-shaped locking member in the entire axial direction can be suppressed, the C-shaped locking member can be held concentrically with the annular groove, and the male member can be easily inserted. Further, since the end surface of the raised portion abuts the shoulder of the female member, the inward movement of the locking member can be regulated.When the male member is further pushed in, the taper wall is forced by the annular protrusion of the male member. After the diameter is increased and deformed outwardly in the radial direction, the back surface of the annular protrusion can be snap-engaged with the C-ring small diameter end of the C-shaped locking member based on the snap action. Then, when the fluid pressure is applied, the male member moves away from the female member,
It is possible to prevent the C-shaped large-diameter end of the C-shaped engaging member from coming into contact with the inner side surface of the opening flange and disengaging the male member.

[0015]

Embodiments of the present invention will be described below with reference to FIGS.

(Embodiment 1) First, an embodiment will be described with reference to FIGS. In the figure, 1 is a cylindrical female member, and the female member 1 has an axial hole 10 extending in the axial direction.
An expanded diameter portion is formed by rolling or the like at one axial end of the thin steel pipe. Specifically, the female member 1 is formed by an overlapping portion in which an opening flange 11 projecting in the centripetal direction at one end in the axial direction is folded inward at the pipe end, and the inner surface of the opening flange 11 is formed at the folded pipe end. 11b is formed. A step 12 having a radially extending surface 12a facing the inner surface 11b is formed inside the opening flange 11 with a predetermined axial length from the facing surface 11b. An annular groove 13 having an inner peripheral surface having a diameter larger than the diameter of the opening 11a is provided adjacent to the opening flange 11.

A first hole 14, a second hole 15 and a third hole 16 are formed inside the annular groove 13 so as to be successively stepped to have a smaller diameter. Then, as shown in FIG. 3 and FIG. 4, a notch 43 is formed over the entire length from one end to the other end in the axial direction so that a C-shaped spring-like locking member having a C-shaped cross section. 4 is inserted into the annular groove 13 and held in the female member 1.

More specifically, the C-shaped locking member 4 is smaller in diameter than the inner diameter and axial length of the annular groove 13 (substantially annular so that it fits into the annular groove 13 of the female member 1 at one end in the axial direction). It has a C-ring-shaped straight cylindrical large diameter portion 41 having an outer diameter of (the inner diameter of the groove 13 is substantially equal) and a length equal to the axial length of the annular groove 13, and is coaxial with the large diameter portion 41 at the other end. Large diameter part 41
A taper wall 42 having a smaller diameter end 402 having a smaller diameter and gradually decreasing in diameter from the other end of the large diameter portion 41 toward the small diameter end 402 is formed.

By forcibly reducing the diameter of the C-shaped detent member 4, the locking member 4 can be inserted into the female member 1 through the opening 11a of the female member 1, and then returned to its original shape. After returning, the large engaging portion 41 is inserted into the annular groove 13, the small diameter end 402 and the taper wall 42 can be expanded in the first hole 14, and the taper wall 42 and the taper wall 42 can be expanded. It is held in a radially outwardly deformable manner with the bending angle 41a at the boundary with the large diameter portion 41 as a base portion.

More specifically, the end surface 401 of the large diameter portion 41
Faces the inner surface 11b of the opening flange 11 of the female member 1, while the corner 41a faces the annular surface 12a extending inward in the radial direction of the step 12, and the outer peripheral surface of the large-diameter portion 41 faces the female member. It contacts the inner peripheral surface of the first annular groove 13. As a result, the locking member 4 is restricted from moving in the axial direction by the large engaging portion 41, and the movement (rattle) in the radial direction of the locking member in the entire axial direction is restricted. Are held in the female member 1 substantially concentrically with the female member.

From the side of the opening flange 11 of the female member 1 in which the C-shaped engaging member 4 is inserted and attached (indicated by arrow A),
As shown in FIG. 2, the cylindrical male member 3 can be easily inserted, and as shown in FIG. 5, the cylindrical female member 1 and the cylindrical male member 3 are connected by the locking member 4 so as not to come off. Can be combined with each other.

That is, the male member 3 has an insertion portion 30 which can be inserted into the female member 1 at one axial end thereof, and an annular protrusion projecting in the centrifugal direction at a predetermined distance position from the tip end on the outer peripheral surface of the insertion portion 30. The part 31 is formed by bulging.

The outer diameter of the annular projection 31 is smaller than the inner diameter of the large diameter portion 41 of the C-shaped locking member 4, but larger than the inner diameter of the small diameter end 402 of this locking member 4. , Small diameter end 4
The inner diameter of 02 is substantially the same as the outer diameter of the insertion portion of the male member 3.

Therefore, as shown in FIG. 2, when the insertion portion of the male member 3 is relatively inserted in the female member 1 in the axial direction, the detent member 4 slightly moves inward, but its corner 41a is formed. Female member 3
Of the step 12 is in contact with the radially inwardly extending surface of the step 12 and its inward movement in the axial direction is restricted, and the taper wall portion 42 can be expanded radially outward by the annular projection 31 to reduce the bending angle 41a. As the base portion, the small diameter end 402 side is deformed outward in the radial direction so that the annular protrusion 31 can finally pass through the small diameter end 402.

Then, as shown in FIG. 5, the female member 1 and the male member 3 can be connected and coupled so as not to come off by a C-shaped locking member 4. That is, at this time, the male member 4
The tip portion of the insertion portion 30 of the female member 1 is guided by the guide ring 17 mounted in the large hole 15 of the female member 1, and is sealed by the seal ring and the backup ring 19 such as the 0 rings 18a and 18b mounted inward. Densely sealed, the tip is the third hole 16
When the fluid pressure acts on the female member 1 and the male member 3, the female member 1 and the male member 3 move in the directions in which they are separated from each other, but the back surface 31a of the annular protrusion 31 of the male member 3 is engaged. The female member 1 and the male member 3 are locked by coming into contact with the small-diameter end 402 of the stopper member 3 to form a connector having a simple structure.

(Embodiment 2) As shown in FIG. 6, this connector has the same C-shaped locking member 4 and cylindrical male member (not shown) as in Embodiment 1 (the same portions are the same). (Reference numeral is attached), the structure of the female member 2 is slightly different.

That is, the female member 2 has an axial hole 20 extending axially inward of the flange portion 21 at one axial end, and this axial hole 20 extends in the centripetal direction formed at one axial end. It has a first hole 24, a second hole 25, and a third hole 26 that gradually decrease in diameter from the side of the annular opening flange 21.

The inner diameter of the first hole 24 is larger than that of the opening 21a of the opening flange 21, and the surface 22a extending in the radial direction from the inner peripheral surface of the axial center portion of the first hole 24.
A plurality of projecting portions 22 projecting inward in the radial direction are formed in an annular shape with a gap in the circumferential direction.

As a result, the inner side surface 21b is separated from the inner side surface 21b formed on the opening flange 21 by a predetermined axial length.
A substantially annular groove 23 is formed between and facing the substantially radially extending surface 22a. Then, the large engagement portion 41 of the locking member 4 is regulated in the annular groove 23 in the axial direction, and the radial movement of the locking member 4 in the entire axial direction is regulated. It is held in the annular groove 23 concentrically with the annular groove 23.

More specifically, the C-shaped locking member 4 has its bending angle 41a abutting on the radially inwardly extending surface 22a of the projection 22 protruding radially inwardly, so that the axially inward direction. Is restricted, and the large-diameter end 401 is in contact with the inner side surface 401 of the flange portion 21 to restrict the movement outward in the axial direction. Further, the outer diameter of the outer peripheral surface of the large diameter portion 41 is formed to be substantially the same as the inner diameter of the annular groove 23, and the C-shaped locking member 4 is formed.
The rattling in the radial direction related to the entire axial direction is substantially regulated.

According to the present invention, the annular groove of the female member can be formed in this way, and further, the protruding portion 22 protruding inward in the radial direction can be formed as an annular continuous annular protruding portion. . Here, the step 12 described in the first embodiment and the protruding portion 22 protruding inward in the radial direction described in the embodiment show typical examples of the “shoulder” in the gist of the present invention.

(Third Embodiment) Next, a third embodiment will be described with reference to FIGS. 7 and 8. In the figure, 5 is a C-shaped locking member, the female member 1 and the male member (not shown) other than the locking member 5 are the same as those in the first embodiment, and the same parts are designated by the same reference numerals. To do.

The C-shaped locking member 5 has a C-shaped cross section by making a notch 53 from one end to the other end in the axial direction over the entire length. A large-diameter portion 51 having a C-ring-shaped large diameter end 501 having a large-diameter end 501 having a C-ring shape is provided at one end in the axial direction, and a small-diameter end 502 coaxially with the large-diameter end 501 is provided at the other end. A taper wall 52 having a gradually decreasing diameter is formed toward a small diameter end 502 via a step portion 51a formed at the other end of 51.

Therefore, this C-shaped locking member 5 can be inserted from the opening 11a of the female member 1 by reducing the diameter, as in the first embodiment, and when restored, the C-shaped locking member 5 can be inserted into the annular groove 13. The ring-shaped large-diameter portion 51 is inserted and held concentrically with the annular groove 13.

That is, the straight cylindrical C of the C-shaped locking member 5
Since the outer diameter of the ring-shaped large-diameter portion 51 is formed to be substantially equal to the inner diameter of the annular groove 13, the radial movement of the locking member 5 in the entire axial direction is restricted, and the locking member 5 is concentrically held in the annular groove 13. In addition, the axial length of the C-ring-shaped large-diameter portion 51 is formed to be substantially equal to the axial length between the inner surface 11b of the opening flange 11 and the step 12 facing the inner surface 11b, which extends in the radial direction. Therefore, when the fluid pressure is applied, the C-ring-shaped large-diameter end 501 is moved to the inner side surface 11b of the opening flange 11.
When the male member (not shown) is inserted by restricting the outward movement in the axial direction of the C-shaped locking member 5 by abutting against the stepped portion 51,
The a contacts the surface 12a of the step 12 extending in the radial direction, and restricts the movement of the locking member 5 inward in the axial direction.

The small diameter end 5 of the C-shaped locking member 5
Since the inner diameter of 02 is formed to be substantially equal to the outer diameter of the insertion portion of the male member as in the first embodiment, the female member 1 and the male member are relatively inserted, so that the female member is similar to the first embodiment. 1 and the male member can be connected by the snap locking action of the locking member 5 and can be coupled so as not to come off.

(Embodiment 4) Next, an embodiment 4 will be described with reference to FIGS.
A description will be given based on 0. In the figure, 6 is a C-shaped locking member, the female member 1 and the male member (not shown) other than the locking member 6 are the same as those in the first embodiment, and the same parts are designated by the same reference numerals. explain.

The C-shaped locking member 6 has a C-shaped cross section by making a notch 63 over the entire length from one end to the other end in the axial direction. A large diameter end 601 is coaxially provided at one end and a small diameter end 602 is coaxially provided at the other end. Further, a taper wall 62 having a diameter gradually decreasing from the large diameter end 601 toward the small diameter end 602 is provided.

Further, a taper wall 62 is provided with a taper in the middle in the axial direction.
It has a semi-circular projecting end face 61a that projects radially outward from the wall 62, has a top part 61b extending parallel to the axis from the apex of the projecting end face 61a, and contacting the large diameter end 601, and a top part 61b.
To form a semi-circular arc from the projecting end face 61a to the large-diameter end 6
Two raised portions 61 each having a semi-circular arc that gradually decreases toward 01 are provided at intervals in the circumferential direction.

Therefore, as shown in FIG. 9, the C-shaped locking member 6 is formed adjacent to the inside of the opening flange 11 from the opening 11a of the opening flange 11 at one axial end of the female member 1. It can be inserted and held in the annular groove 13.

That is, the ring-shaped large-diameter end 602 of the C-shaped engaging female member 6 abuts on the inner side surface 11b of the opening flange 11 to restrict the outward movement of the locking member 6 in the axial direction. The protruding end surface 61a of the stopper member 6 abuts on the annular surface 12a of the female member 1 extending inward in the radial direction of the step 12, and the locking member 6
It is designed to regulate the axial outward movement of the.

Further, the apex 61b extending in the axial direction abuts on the inner peripheral surface of the annular groove 13 to prevent radial rattling of the C-shaped locking member 6 in the entire axial direction. . The locking member 6 is integrally formed of resin such as nylon by injection molding.

(Fifth Embodiment) Finally, a fifth embodiment will be described with reference to FIGS. 12 and 13. This example is similar to example 4. That is, the C-shaped locking member 7 has a C-shaped cross section by making a notch 73 over the entire length from one end to the other end in the axial direction. Further, a taper wall 72 having a gradually decreasing diameter is provided from the ring-shaped large-diameter end 701 at one end to the ring-shaped small-diameter end 702 at the other end.

Further, a taper wall 72 is provided with a taper in the middle in the axial direction.
It has a semi-arcuate projecting end face 71a that projects radially outward from the wall 72, extends from the apex of the projecting end face 71a in parallel with the axis, and is formed so as to contact the large-diameter end 601.
The taper wall 72 is provided with a raised portion 71 having a slit 72a for forming a protruding end surface 71a, and is integrally formed by press forming from a spring steel plate.

It should be noted that the raised portion 6 of the fourth and fifth embodiments
Although the cross-sections of 1 and 71 are formed in a semi-circular shape, a ridge having a trapezoidal or triangular cross-section may be used.

The present invention can be implemented in many other modes and modes without departing from the gist of the present invention.

For example, the female member 1 can be made of resin, and in this case, the opening flange at one end in the axial direction does not need to have a folded portion, and the male member 3 can of course be made of resin. The annular protrusion can be formed by changing the appropriate shape by cutting.

[0048]

According to the present invention, a C-shaped locking member having a taper wall and having a simple structure is provided in the female member without forming a notch in the conventional female member. It is possible to prevent the rattling of the locking member in the radial direction with respect to the entire length in the axial direction and to insert the locking member so as to restrict the inward movement in the axial direction, so that the locking member can be easily inserted into the female member. In addition to the above, it is possible to provide a connector that facilitates insertion work of the male member.

[Brief description of drawings]

FIG. 1 is a sectional view of a stop member according to a first embodiment of the present invention and a locking member inserted into the female member.

FIG. 2 is a cross-sectional view showing a state in which a male member is inserted into the female member shown in FIG.

FIG. 3 is a perspective view of the locking member shown in FIG.

FIG. 4 is a bottom view of FIG.

5 is a cross-sectional view showing a state in which a male member is connected and coupled to the female member of FIG.

FIG. 6 is a cross-sectional view showing a state where the locking member of the first embodiment is inserted and attached to the female member according to the second embodiment.

FIG. 7 is a sectional view showing a state in which the locking member of the third embodiment is inserted into the female member of the first embodiment.

8 is a perspective view of the locking member shown in FIG. 7. FIG.

FIG. 9 is a cross-sectional view showing a state in which the lock of the fourth embodiment is inserted and attached in the female member of the first embodiment.

10 is a perspective view of the locking member shown in FIG.

11 is a left-side sectional view taken along line XX of FIG.

FIG. 12 is a perspective view of a locking member of the fifth embodiment.

13 is a left side view taken along the line YY of FIG.

FIG. 14 is a half sectional view of a conventional connector.

FIG. 15 is a right side view of FIG.

16 is a side view of the C-shaped locking member shown in FIG.

FIG. 17 is a plan view of FIG.

[Explanation of symbols]

 1, 2: Female member 11, 21: Opening flange 11a: 21a: Opening 11b, 21b: Inner peripheral surface 12: Step (shoulder) 22: Radially inward projecting portion (shoulder) 12a, 22a: Radial direction Inner surface 13:23: annular groove 3: male member 30: insertion portion 31: annular protrusion 4, 5, 6, 7: C-shaped locking member 401, 501, 601, 701: C-ring Large-diameter end 402, 502, 602, 602: C-ring-shaped small-diameter end 41, 51: C-ring-shaped large-diameter portion 61, 71: Raised portion 42, 52, 62, 72 ,: Taper wall 41a: Corner 51a: Step portion 61a: 71a: protruding end surface 43, 53, 63, 73: notch

Claims (4)

[Claims] 1. A tubular female member having an opening flange extending in the centripetal direction at one axial end thereof and having an annular groove adjacent to the inside of the opening flange and having an inner diameter larger than the opening diameter of the opening flange. An axially inward direction from the opening flange side of the female member having an insertion portion at one end in the axial direction, and having an annular projection on the outer peripheral surface of the insertion portion at a predetermined distance position from the tip end in the centrifugal direction. A cylindrical male member to be inserted into the housing, a female member inserted into the annular groove from the opening flange side, and a C-shaped spring elastic locking member for preventing the male portion from coming off. A member having a substantially radially extending surface facing the inner surface at a predetermined axial length from the inner surface of the opening flange to form the annular groove, The locking member fits in the annular groove at one end side and is approximately equal to the inner diameter of the annular groove It has a C-ring-shaped large-diameter portion having an outer diameter and an axial length equal to the outer-axial length, and a C-ring-shaped small-diameter end having a diameter smaller than the outer diameter of the annular projection of the male member at the other end. A connector having a taper wall whose diameter decreases from the C-ring-shaped large-diameter portion toward the C-ring-shaped small-diameter end. 2. A tubular female member having an opening flange extending in the centripetal direction at one axial end and having an annular groove adjacent to the inside of the opening flange and having an inner diameter larger than the opening diameter of the opening flange. , Having an insertion portion at one end in the axial direction and having an annular projection protruding in the centrifugal direction at a predetermined distance position from the tip on the outer peripheral surface of the insertion portion, and extending inward in the axial direction from the opening flange side of the female member. A cylindrical male member to be inserted, a C-shaped spring-elastic locking member for preventing the male member and the female member inserted in the annular groove from the opening flange side from coming off. A shoulder having a substantially radially extending surface facing the inner surface at a predetermined axial length from the inner surface of the opening flange to form the annular groove, The locking member has at one end a C-ring-shaped large-diameter end that is approximately equal to the inner diameter of the annular groove, and A C-ring-shaped small-diameter end having a diameter smaller than the diameter of the annular projection of the male member coaxially with the C-ring-shaped large-diameter end, and extending from the C-ring-shaped large-diameter end to the C-ring-shaped small-diameter end. With a small diameter
The pa-wall and a projecting end face projecting radially outward from an intermediate part in the axial direction of the taper wall engaging with the radially-extending surface of the shoulder of the female member, and the C-ring-shaped large end from the projecting end face. A connector integrally provided with a raised portion having a top portion extending parallel to an axis toward a radial end. 3. The connector according to claim 1, wherein the shoulder has a step. 4. The connector according to claim 1, wherein the shoulder is formed of a protrusion protruding radially inward.