JPH05196185A - Connector and male connector - Google Patents

Abstract

(57) [Abstract] [Purpose] It is possible to stabilize the locking force by increasing the locking force with the claw portion 32 of the holding claw member 3, and forcibly expanding the diameter of the insertion end 10 formed of a cylindrical pipe. To provide a connector for piping and a male connector 1 capable of reducing or avoiding the above. [Structure] The male connector 1 cooperates with the female connector 2 to form a connector. The male connector 1 is configured by attaching and holding a locking member 16 formed in a cylindrical shape as a separate body to the outer periphery of an insertion end portion 10 formed at one end of a cylindrical pipe. Ring-shaped convex engaging portions 11 and 12 are formed on the insertion end portion 10 by enlarging the peripheral wall of the insertion end portion 10. The locking member 16 has a conical outer peripheral surface 16c for snap-engaging the holding claw member 3 of the female connector 2 on the outer circumference.
And a ring-shaped restraining surface 16d extending inward in the radial direction to engage with the claw portion 32 of the holding claw member 3 and a center hole 16k. The concave engaged parts 16a, 16b formed on the inner peripheral edge of the center hole 16k are engaged with the convex engaging parts 11, 12 to hold the locking member 16 at the insertion end 10.
It constitutes the male connector 1.

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 a hose or a pipe for transferring fluid such as gasoline, oil, water and air, and a male connector used therefor.

[0002]

2. Description of the Related Art Conventionally, as a connector for piping, as shown in FIG. 37, a convex engaging portion 101 made of a cylindrical pipe and extending in a ring shape and extending ahead of the engaging portion 101 is provided. A pipe-shaped male connector 100 that can be formed inexpensively without the need for cutting with the inserted insertion end 102;
It is disclosed that a receiving hole 202 having a receiving opening 201, a claw portion 204 made of a ring-shaped wire, and a female connector 200 having a seal ring 205 arranged in the receiving hole 202 (French publication). Description 2555443
issue). The engaging portion 101 has a conical surface 101a.

In this connector, the insertion end 102 of the male connector 100 is inserted from the receiving opening 201 into the receiving hole 202 of the female connector 200 during use. As a result, when the conical surface 101a of the engaging portion 101 of the male connector 100 spreads the claw portion 204 and enters deeper than the claw portion 204, the rear surface 101c of the engaging portion 101 is locked to the claw portion 204, Thereby, the male connector 100 and the female connector 200
And are combined.

By the way, in the above-mentioned connector, the engaging portion 101 formed on the male connector 100 is formed by expanding a part of the peripheral wall of the pipe-shaped male connector 100 by bulging. Therefore, the amount of protrusion of the engaging portion 101 outward in the radial direction is limited. Therefore, the engaging portion 101
The locking force between the claw portion 204 and the claw portion 204 is not always sufficient, and the degree of coupling between the male connector 100 and the female connector 200 is limited.

In particular, when the insertion end portion 102 is formed of an electric resistance welded pipe formed by continuously bending a band plate and resistance welding the joints, the welded portion is increased by increasing the diameter expansion degree. Since it is easily damaged, it is difficult to form the engagement portion 101 with a large protrusion by increasing the diameter expansion degree. Further, in the related art in which a part of the peripheral wall of the pipe-shaped male connector 100 is expanded by bulging to form the engaging portion 101, stress concentration at the maximum diameter portion 101b of the conical surface 101a of the engaging portion 101 is concentrated. In order to avoid or reduce the above, the maximum diameter portion 101b of the conical surface 101a of the engaging portion 101 has a considerably large roundness. Also in this sense, there is a problem that the locking force by the claw portion 204 is weak and the degree of coupling between the male connector 100 and the female connector 200 is not sufficient.

Also, as shown in FIG. 38, a connector in which a cylindrical locking member 300 having a conical surface 301 is attached to the outer peripheral surface of the male connector 100 adjacent to the ring-shaped engaging portion 108 is also the same. Disclosed in the book. Also in this connector, the amount of protrusion of the engaging portion 108 is small and is basically the same as the height of the locking member 300. Therefore, even if the locking member 300 is attached, the locking force cannot be improved. Further, since the engaging portion 108 is also formed by expanding a part of the peripheral wall of the pipe-shaped male connector 100 by bulging, it has a fairly large roundness and the locking force by the claw portion 204 is weak. If the engaging portion 108 is cut out by cutting, the edge is formed, but the cost becomes high.

[0007]

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and an object thereof is to provide an inexpensive means without cutting or brazing an engaging portion of a male member. An object of the present invention is to provide a connector and a male connector that can increase the locking force.

[0008]

A connector according to claim 1 comprises:
A straight cylindrical insertion end formed at one end of the cylindrical pipe,
A male connector provided with a tubular locking member held on the outer periphery of the insertion end, a receiving opening end into which the inserting end of the male connector can be inserted, and a receiving opening end provided A connector comprising a female connector having deformable holding means, wherein an insertion end portion of the male connector includes an engagement portion formed by expanding or contracting a peripheral wall of the insertion end portion. ,
The locking member of the male connector is larger on the outer circumference than the outer diameter of the insertion end and gradually increases in diameter from the front end of the insertion end toward the rear end, and the locking member of the female connector contacts the holding means. A conical outer peripheral surface that elastically deforms the holding means radially outward with contact, and snap-engages with the holding means and extends radially inward from the outer circumference to prevent the male connector from coming off the female connector A restraining surface, a center hole having an inner diameter substantially the same as the outer diameter of the insertion end portion at the center of the shaft, and an engaged portion formed at an inner peripheral edge portion of the central hole. The engaging member is held at the insertion end by engaging the engaging portion.

A male connector according to a second aspect of the invention cooperates with a female connector having a deformable holding means to form a connector, and is held at one end of a cylindrical pipe and an outer circumference of the one end. A cylindrical locking member, the locking member having a central hole having an inner diameter substantially equal to the outer diameter of the cylindrical pipe, and an engaged portion formed at an inner peripheral edge of the central hole. A cylindrical outer peripheral surface forming the outer circumference, and a restraining surface extending inward in the radial direction from the outer circumference to prevent the outer peripheral surface of the cone from coming off the female connector in cooperation with the holding means. One end portion of the cylindrical pipe is provided with an engaging portion formed by enlarging or reducing the peripheral wall of the one end portion, and the engaging portion is engaged with the engaged portion so as to be attached to the one end portion of the cylindrical pipe. It is characterized in that the locking member is held.

In the present invention, the engaging portion provided at the insertion end may be formed in a convex shape by enlarging the peripheral wall of the insertion end,
Alternatively, the peripheral wall of the insertion end may be reduced in diameter to form a concave shape. Further, the engaging portion provided on the insertion end may be continuous in the circumferential direction so as to make one round around the outer circumference of the insertion end, or at a predetermined distance from the outer circumference of the insertion end. It may be formed intermittently in the circumferential direction.

The engaged portion of the locking member engages with the engaging portion of the insertion end, and may be convex or concave. In the present invention, the restraining surface of the locking member is preferably formed such that the outer peripheral portion thereof is substantially edge-shaped. This is because the locking force is further improved.

[0012]

The operation of the connector of the present invention will be described together with the method of using it. Insert the insertion end of the male connector through the receiving opening end of the female connector. Then, the conical outer peripheral surface of the locking member comes into contact with the holding means and pushes the holding means radially outward to elastically deform it. As a result, the locking member of the male connector gets over the holding means and moves inward. In this way, when the locking member gets over the holding means, the restraining surface of the locking member and the holding means are locked, whereby the male connector and the female connector are coupled.

In the male connector of the present invention, the locking member is formed separately from the cylindrical pipe, and the separate locking member is held at the end of the cylindrical pipe, so that the female connector and the male connector are The locking part of can be maximized in the radial direction,
The locking area is also secured. Moreover, in the male connector of the present invention, since the locking member is separate from the insertion end, it is possible to form the outer peripheral end of the restraining surface of the locking member in an edge shape.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the connector of the present invention will be described below with reference to FIGS. 1 and 2 show a state in which the male connector and the female connector are coupled, and FIGS. 3 and 4 show a state in which the male connector is being inserted into the female connector. (Structure of Embodiment) In this embodiment, a male connector 1 is provided with an insertion end portion 10 formed of one end of a metal cylindrical pipe and an outer peripheral portion of the insertion end portion 10 as shown in FIGS. 1, 3, and 7. The engaging member 16 is held by two formed ring-shaped convex engaging portions 11 and 12.

The engaging portions 11 and 12 are formed by enlarging the peripheral wall of the insertion end portion 10, and the outer peripheral surfaces thereof are arcuate surfaces 11a and 12a having arcuate sections. Then, by using the cylindrical metal locking member 16 and locking the concave engaged portions 16a and 16b of the inner peripheral portion of the locking member 16 to the engaging portions 11 and 12, respectively, The stop member 16 is held substantially coaxially with the outer peripheral surface of the male connector 1 so as not to be displaced substantially in the axial direction. The locking member 16 has a conical outer peripheral surface 16c having an outer diameter larger than the outer diameter of the insertion end portion 10 and gradually increasing in diameter with increasing distance from the tip of the insertion end portion 10, and a ring-shaped restraining surface 16d extending in the radial direction. With and. The maximum diameter portion 16 of the restraining surface 16d
The radius of curvature of r is set to 1 mm or less, and thus the maximum diameter portion 16r of the restraining surface 16d is not substantially rounded. The inner diameter of the center hole 16k of the locking member 16 is substantially the same as the outer diameter of the insertion end portion 10.

A guide portion 10a is formed at the tip of the insertion end portion 10 for easy insertion. A rubber hose (not shown) is connected to the other end of the male connector 1. By the way, in this embodiment, the locking member 1 is attached to the male connector 1.
In holding 6, the following can be done. That is, FIG.
As shown in FIG. 14, a locking member 16 having two ring-shaped engaged portions 16a and 16b on the inner peripheral portion thereof is used, and the locking member 16 is attached to the pipe-shaped insertion end portion 10 whose end face is cut. After that, liquid pressure or rubber pressure is applied to the inner surface of the peripheral wall of the insertion end portion 10 to expand the peripheral wall portion of the peripheral wall of the insertion end portion 10 corresponding to the engaged portions 16a and 16b in the radially outward direction. The engaging portions 11 and 12 are formed by being extended so that the engaging portion 1
1 and 12 and the engaged parts 16a and 16b are locked.

The female connector 2 is shown in FIG. Receiving opening end 2s for receiving the male connector 1 of the female connector 2
A circular receiving opening 24 is formed in the. The female connector 2 has a ring-shaped first inner peripheral surface 23 that defines a receiving hole 23 a communicating with the receiving opening 24. As shown in FIG. 6, the first inner peripheral surface 23 includes an inner peripheral surface 23c having the same diameter that defines the receiving opening 24, a conical inner peripheral surface 23d that reduces in diameter with increasing distance from the receiving opening 24, and a seal inner peripheral surface 23e. A ring groove 23f formed in the seal inner peripheral surface 23e, an inner peripheral surface 23g having the same diameter, and step portions 23i and 23j. Rubber O-rings 28a and 28b as ring seals and a resin ring-shaped collar 29 are coaxially fitted in the space defined by the seal inner peripheral surface 23e. A ring-shaped bush 27 made of resin is engaged and fixed to the ring groove 23f. As shown in FIG. 1, the female connector 2 is provided with a bamboo-shaped seal groove 22i.

Further, as can be understood from FIG. 2, the peripheral wall of the receiving opening end 2s of the female connector 2 is provided with a slit hole 2t extending in an arc shape and a pin hole-like insertion hole 2r. Three slit holes 2t are formed along the circumferential direction, and two insertion holes 2r are arranged in parallel. As shown in FIGS. 1 and 2, a metal wire made of spring steel having a large elastic force, which constitutes the holding claw member 3 serving as a holding means, is inserted into the slit hole 2t, and the end portion of the metal wire is inserted. Insert hole 2r
The holding claw member 3 is mounted on the female connector 2 by holding the holding claw member 3. Therefore, as shown in FIG. 2, the holding claw member 3 includes a holding projection 31 held in the insertion hole 2r and a claw 32 protruding inward from the inner peripheral surface 23c of the female connector 2 having the same diameter. , The outer exposed portion 33 located outside the outer peripheral surface 2u of the female connector 2.

(Operation of Embodiment) Now, the operation of the quick connector of this embodiment will be described together with its operation. First, the insertion end 10 of the male connector 1 is inserted into the female connector 2 through the receiving opening 24 of the female connector 2. Then, as the insertion end portion 10 is inserted backward, as shown in FIG.
As can be understood from FIG. 5, the conical outer peripheral surface 16 of the locking member 16
The claw portion 32 is pushed outward in the radial direction, that is, in the direction of the arrow Y1 and elastically deformed, and as a result, the claw portion 32 expands and retracts. As a result, the outer exposed portion 33 is separated from the outer peripheral surface 2u of the female connector 2 as shown in FIG. As a result, the conical outer peripheral surface 16c of the locking member 16 rides over the claw portion 32. Further, as shown in FIG. 1, when the conical outer peripheral surface 16c of the locking member 16 completely passes over the claw portion 32 as the insertion work progresses, the resilient force of the holding claw member 3 restores the claw portion 32 in the radially inward direction. Then, the claw portion 32 of the holding claw member 3 and the restraining surface 16d of the locking member 16 are locked, and thus the coupling between the male connector 1 and the female connector 2 is completed.

Here, the restraining surface 16d extends along the direction perpendicular to the axis,
Moreover, the outer diameter can be set large, and the restraining surface 16d
Since the maximum diameter portion 16r of is not substantially rounded,
The locking force between the claw portion 32 and the restraining surface 16d is strong. In such a coupled state, as shown in FIG. 1, the conical outer peripheral surface 16c of the locking member 16 faces or closely contacts the conical inner peripheral surface 23d of the female connector 2, so that the locking member 16 has The rattling in the axial direction is restricted.

Of the locking member 16, the engaging portion 11,
Since 13 is engaged on both sides in the axial direction, shift movement of the locking member 16 in the axial direction is prevented. When releasing the connection between the male connector 1 and the female connector 2, the outer exposed portion 33 of the holding claw member 3 in the state of FIG.
Forcibly pulling the claw part 32 outwards in the radial direction and pulling the claw portion 32 into the inner peripheral surface 2 having the same diameter.
By elastically deforming more radially than 3c, the engagement between the claw portion 32 and the restraining surface 16d is released. If the insertion end 10 of the male connector 1 and the female connector 2 are relatively separated in the axial direction in the state where the locking is released in this way, the male connector 1 and the female connector 2 can be easily separated in a short time. To be done.

(Effects of Embodiment) As described above, in this embodiment, the engagement is performed by using the separate engagement member 16 provided with the conical outer peripheral surface 16c and the ring-shaped restraining surface 16d in the direction perpendicular to the axis. The member 16 is held on the outer peripheral surface of the insertion end 10. Since the locking member 16 is separate from the insertion end portion 10 in this manner, the outer diameter of the locking member 16 can be set large without being affected by the outer diameter of the insertion end portion 10, and thus the locking member 16 can be set. The locking area can be set to be large, and thus the locking force of the locking member 16 can be increased, and the coupling between the male connector 1 and the female connector 2 can be strengthened.

In addition, in this embodiment, the restraining surface 16d is substantially perpendicular to the axis, and the maximum diameter portion 16r of the restraining surface 16d is not substantially rounded. The locking force can be strengthened, and the connection between the male connector 1 and the female connector 2 can be further strengthened. Further, in this embodiment, the locking member 16 having a diameter larger than that of the insertion end portion 10 is held on the insertion end portion 10 to form the male connector 1. Therefore, as compared with the conventional example shown in FIG. The diameter expansion process of 10 can be reduced or eliminated. Therefore, in this embodiment, it is possible to solve the problem that there is a limit to the expansion of the diameter of the pipe-shaped insertion end portion, which has occurred conventionally.

Furthermore, in the present embodiment, FIG.
As can be understood from FIG.
And a minute gap m between the outer peripheral surface of the insertion end 10 of the male connector 1 and
Therefore, the internal pressure of the fluid becomes O-rings 28a, 28b, and color-2.
There is a risk that they will act on 9 and move. In this case, it is disadvantageous to maintain the high sealing performance of the O-rings 28a and 28b. In this respect, in the embodiment, the bush 27
Is engaged with and fixed to the ring groove 23f of the female connector 2, the movement of the O-rings 28a, 28b and the collar 29 is blocked by the bush 27. Therefore, it is possible to avoid the movement of the O-rings 28a, 28b and the collar 29 due to the transmission of the internal pressure through the minute gap m, which is advantageous in maintaining a high sealing property.

(Other Embodiment) Next, a second embodiment of the connector of the present invention will be described with reference to FIG. The connector of this embodiment has basically the same configuration as that of the first embodiment, and the portions having the same functions are designated by the same reference numerals. However, in this example, the claw portion 3 as a holding means that is elastically deformable in the radially outward direction
2 is formed integrally with the receiving opening end 2s of the female connector 2.

A third embodiment of the connector of the present invention will be described with reference to FIGS. The connector of this embodiment has basically the same configuration as that of the first embodiment, and the portions having the same functions are designated by the same reference numerals. However, there is only one ring-shaped concave engaged portion 16a formed on the inner peripheral portion of the locking member 16, and correspondingly, a ring is formed on the outer peripheral portion of the insertion end portion 10 of the male connector 1. -Shaped convex engaging portion 11
Are formed.

A holding claw member 5 is provided in the slit groove 2t of the female connector 2. The holding claw member 5 is formed by bending a metal wire into a substantially rectangular shape, and has an outer exposed portion 51, a claw portion 52, and an outer exposed portion 53. Also in this example, as the insertion end portion 10 of the male connector 1 is inserted further into the female connector 2, the conical outer peripheral surface 1 of the locking member 16 is inserted.
6c radially outwardly moves the claw portion 52, that is, an arrow Y shown in FIG.
While being elastically deformed in one direction, the holding claw member 5 is elastically deformed using the bent portion 53c of the outer exposed portion 53 of the locking member 5 as a fulcrum, as can be understood from FIG. As a result, the conical outer peripheral surface 16c gets over the claw portion 52. Then the first
Similar to the embodiment, the claw portion 52 is restored in the radial direction by its elastic force, the claw portion 52 and the restraining surface 16d are locked, and thus the coupling between the male connector 1 and the female connector 2 is completed. ..

In this example, in holding the locking member 16 on the male connector 1, the following can be done. That is, FIG.
As shown in FIG. 17, a locking member 16 having one ring-shaped engaged portion 16a at the center of the inner peripheral portion is used, the locking member 16 is inserted into the insertion end portion 10, and then, , Insertion end 1
Liquid pressure or rubber pressure is applied to the peripheral wall of
This is performed by expanding the diameter of the peripheral wall portion corresponding to a to form the engaging portion 11.

Next, a fourth embodiment of the connector of the present invention is shown in FIG.
8 and FIG. 19 will be described. The quick connector of this embodiment has basically the same configuration as that of the example shown in FIG. 9, and parts having the same functions are designated by the same reference numerals. However, in FIG.
As shown in FIG. 9, by expanding the diameter of the peripheral wall of the insertion end portion 10, two tongue-shaped engaging portions 11 and 12 are formed so as to face each other.

Next, a fifth embodiment of the connector of the present invention is shown in FIG.
0, it demonstrates based on FIG. The quick connector of this embodiment also has basically the same configuration as that of the example shown in FIG. 9, and the parts having the same functions are designated by the same reference numerals. However, FIG.
As shown in FIGS. 0 and 21, only one tongue-shaped engaging portion 11 is formed on the insertion end 10. Next, a sixth embodiment of the connector of the present invention will be described with reference to FIGS.
The quick connector of this embodiment also has basically the same configuration as that of the example shown in FIG. 1, and portions having the same functions are designated by the same reference numerals. Therefore, as shown in FIG. 25 (A), the locking member 18 has a conical outer peripheral surface 18c and a restraining surface 18d, and the maximum diameter portion 18r of the restraining surface 18d is not rounded. However, unlike the first embodiment, the locking member 18 is of a split type, and the half ring-shaped split portions 18e and 18f are connected to the pin portion 18.
It is formed by swingably pivoting at h. Then, as shown in FIG. 25 (B), the split portion 1 of the locking member 18
The locking member 18 is positioned on the outer peripheral side of the male connector 1 in a state where 8e and 18f are opened.
By closing e and 18f, as shown in FIG. 22, the locking member 18 is held on the outer peripheral surface portion between the engaging portions 11 and 13 of the insertion end portion 10.

Also in this example, as the insertion end 10 of the male connector 1 is inserted further into the female connector 2, as shown in FIG. It is pushed outwards, that is, in the direction of the arrow Y1, and as a result, the conical outer peripheral surface 18c rides over the claw portion 32, and as shown in FIG.
And the claw portion 32 are locked.

27 to 28 show the seventh embodiment and show another example of the division type. In this example, one concave engaged portion 1 is provided at the center of the inner peripheral portion of the central hole 18k of the locking member 18.
8a is formed, and this engaged portion 18a is shown in FIG.
The engaging member 11 of the insertion end 10 shown in FIG. Further, in the above-described first embodiment, as shown in FIG. 1, the engaging portions 11 and 12 formed on the insertion end portion 10 of the male connector 1 are arcuate surfaces 11 having an arcuate cross section.
a, 12a, but not limited to this, and the eighth shown in FIG.
As in the embodiment, the engaging portions 11, 1 formed on the insertion end portion 10
It is needless to say that 2 may have a rectangular shape or an approximate shape, and the cross-sectional shapes of the engaged portions 16a and 16b of the locking member 16 may have a rectangular shape or an approximate shape correspondingly.

Next, a ninth embodiment of the connector of the present invention is shown in FIG.
This will be described with reference to FIGS. The quick connector of this embodiment also has basically the same configuration as that of the example shown in FIG. 1, and portions having the same functions are designated by the same reference numerals. However, the engaging portion 11 formed on the insertion end portion 10 has a concave shape, and the engaged portion 16a formed on the locking member 16 has a convex shape protruding radially inward. As shown in FIG. 32, the engaging portion 11 formed on the insertion end portion 10 has a ring-shaped concave shape.

Next, a tenth embodiment of the connector of the present invention will be described with reference to FIGS. 33 and 34. The quick connector of this embodiment also has basically the same configuration as that of the example shown in FIG. 1, and portions having the same functions are designated by the same reference numerals. However, the engaging portions 11 are concave, and are formed at positions facing each other as shown in FIG. 34 by reducing the diameter of a part of the peripheral wall of the insertion end portion 10.

Next, an eleventh embodiment of the connector of the present invention will be described with reference to FIGS. The quick connector of this embodiment also has basically the same configuration as that of the example shown in FIG. 1, and portions having the same functions are designated by the same reference numerals. However, the engaging portion 11 is concave, and one is formed as shown in FIG. 36 by reducing a part of the peripheral wall of the insertion end portion 10.

[0036]

According to the present invention, a separate locking member having a conical outer peripheral surface and a restraining surface is used, and the locking member is held substantially coaxially with the outer peripheral surface of the insertion end made of a cylindrical pipe. is doing. Since this locking member is formed separately from the insertion end, the outer diameter of the locking member can be appropriately set to a large value. Therefore, a large locking area between the restraining surface and the holding means, and thus a large locking force can be secured. Therefore, the connection between the male connector and the female connector can be strengthened.

Moreover, when the restraint surface is substantially perpendicular to the axis and the maximum diameter portion of the restraint surface is not substantially rounded, the locking force between the restraint surface and the holding means is increased. The connection between the male connector and the female connector can be made even stronger. Further, according to the present invention, since the large-diameter locking member is held on the outer peripheral surface of the insertion end, the diameter expansion processing or diameter reduction processing of the peripheral wall of the male connector can be reduced or eliminated. Therefore, according to the present invention, it is possible to solve the conventional problem that there is a limit to the expansion or contraction of the diameter of the pipe-shaped male connector.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a state in which a male connector and a female connector are joined together.

FIG. 2 is a front view of the state seen from the arrow K1 direction in FIG.

FIG. 3 is a sectional view of the male connector inserted into the receiving opening end of the female connector.

FIG. 4 is a cross-sectional view showing a state in which a male connector is inserted into a receiving opening end portion of a female connector and a claw portion is elastically deformed radially outward by a conical outer peripheral surface of a locking member.

5 is a front view of the state seen from the arrow K2 direction in FIG. 4. FIG.

FIG. 6 is a sectional view of a female connector.

FIG. 7 is a side view of the male connector.

FIG. 8 is a cross-sectional view of a state in which a male connector and a female connector according to the second embodiment are joined together.

FIG. 9 is a cross-sectional view showing a state in which a male connector and a female connector according to the third embodiment are joined together.

10 is a front view of the state seen from the direction of arrow K4 in FIG.

FIG. 11 is a front view of a state in which a claw portion of a holding claw member is elastically deformed in a radially outward direction.

FIG. 12 is a cross-sectional view of the insertion end portion of the male connector before the engagement portion is formed.

FIG. 13 is a cross-sectional view showing a state in which a locking member is inserted through the insertion end of the male connector before the engagement portion is formed.

FIG. 14 is a cross-sectional view showing a state in which a locking member is engaged with the peripheral wall of the insertion end of the male connector by an engaging portion formed by bulging.

FIG. 15 is a cross-sectional view of the insertion end portion of the male connector before the engagement portion is formed.

FIG. 16 is a cross-sectional view showing a state in which a locking member is inserted through the insertion end of the male connector before the engagement portion is formed.

FIG. 17 is a cross-sectional view showing a state in which a locking member is engaged by an engaging portion formed on the peripheral wall of the male connector.

FIG. 18 is a sectional view of a main part of a male connector according to a fourth embodiment.

FIG. 19 is a transverse cross-sectional view of the insertion end portion according to the fourth embodiment.

FIG. 20 is a sectional view of a main part of a male connector according to a fifth embodiment.

FIG. 21 is a transverse cross-sectional view of the insertion end portion according to the fifth example.

FIG. 22 is a sectional view of the male connector according to the sixth embodiment which is being inserted into the female connector.

FIG. 23 is a cross-sectional view showing a state in which a male connector and a female connector according to the sixth embodiment are joined together.

FIG. 24 is a front view as seen from the direction of arrow K5 in FIG. 23.

FIG. 25 shows a state in which the split type locking member according to the sixth embodiment is opened, (A) is a side view, and (B) is a front view.

FIG. 26 is a side view of the male connector in which the split type locking member according to the sixth embodiment is held at the insertion end.

FIG. 27 is a view showing a state in which a split type locking member according to a seventh embodiment is opened, (A) is a side view, and (B) is a front view.

FIG. 28 is a side view of the insertion end portion according to the seventh embodiment.

FIG. 29 is a cross-sectional view of the main parts of the connector according to the eighth example.

FIG. 30 is a cross-sectional view showing a state in which a male connector and a female connector according to the ninth embodiment are joined together.

FIG. 31 is a sectional view of a main part of a male connector according to a ninth embodiment.

FIG. 32 is a cross-sectional view of the insertion end portion according to the ninth embodiment.

FIG. 33 is a cross-sectional view of the main parts of the male connector according to the tenth embodiment.

FIG. 34 is a transverse cross-sectional view of the insertion end portion according to the tenth embodiment.

FIG. 35 is a cross-sectional view of the main parts of the male connector according to the eleventh embodiment.

FIG. 36 is a transverse cross-sectional view of the insertion end portion according to the eleventh embodiment.

FIG. 37 is a side view showing a partial cross section of a state immediately before the male connector according to the conventional example is inserted into the female connector.

FIG. 38 is a side view showing a partial cross section of a main part of a male connector according to a conventional example.

[Explanation of symbols]

In the figure, 1 is a male connector, 11 and 12 are engaging portions, 16 is a locking member, 16c is a conical outer peripheral surface, 16d is a restraining surface, 2 is a female connector, 2s is a receiving opening end portion, 3 is a holding claw member. (Holding means), 32 is a claw portion.

Claims (3)

[Claims] 1. A male connector having a straight cylindrical insertion end formed at one end of a cylindrical pipe, and a cylindrical locking member held on the outer periphery of the insertion end, and a male connector of the male connector. A receiving opening end into which the insertion end can be inserted,
A female connector having a deformable holding means provided at the receiving opening end portion, wherein the insertion end portion of the male connector is formed by expanding or contracting a peripheral wall of the insertion end portion. The locking member of the male connector has an outer circumference that is larger than the outer diameter of the insertion end and gradually increases in diameter from the tip of the insertion end toward the rear end. , A conical outer peripheral surface that elastically deforms the holding means radially outward when the female connector comes into contact with the holding means, and a snap-engaged engagement with the holding means and extends radially inward from the outer circumference. A restraining surface for preventing the connector from coming off the female connector, a center hole having an inner diameter substantially the same as the outer diameter of the insertion end portion in the shaft center portion, and an engaged portion formed in an inner peripheral edge portion of the center hole. By engaging the engaging portion with the engaged portion, Connector being characterized in that allowed retaining the locking member in the. 2. A connector which cooperates with a female connector provided with a deformable holding means, wherein one end of a cylindrical pipe and a cylindrical lock held on the outer periphery of the one end. The engaging member includes a central hole having an inner diameter substantially equal to the outer diameter of the cylindrical pipe, an engaged portion formed at an inner peripheral edge portion of the central hole, and an outer periphery of the engaging member. A conical outer peripheral surface and a holding means for preventing the connector from coming off from the female connector,
A restraining surface extending inward in the radial direction from the outer circumference, and one end of the cylindrical pipe includes an engaging portion formed by expanding or contracting a peripheral wall of the one end, and the engaged portion A male connector, characterized in that the engaging portion is engaged with, and the locking member is held at the one end portion of the cylindrical pipe. 3. A connector, wherein an outer peripheral portion of a restraining surface of the locking member according to claim 1 or 2 is formed in a substantially edge shape.