JP2000097384A - Quick connector - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily work the structure and the shape of a socket by constituting a stopper for a slider of a stop ring holding part projecting outward the socket and formed by folding back the circumferential wall of the socket and a stop ring fitted to the slider side. SOLUTION: A stopper 1k specifying a rear stop position of a slider 6 projects outward a socket 1. The stopper is constituted of a stop ring holding part 1i having a structure formed by folding back the circumferential wall of the socket 1 and a stop ring 10 composed of a snap ring or the like fitted to the slider 6 side of the stop ring holding part 1i. When the socket 1 is molded of a sheet material by press working with no cutting work, a stop ring holding part 1i can be formed by buckling work in a continuous process of deeply drawing the socket 1 from the sheet material. This constitution can omit another process of machining a groove by another machine after the deep drawing of the sheet material like the conventional techniques.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a quick connector used for a pneumatic circuit, a hydraulic circuit, a hydraulic circuit, or the like of an air tool, a panel pipe, a pneumatic device, etc., and which can be quickly operated for connection or disconnection thereof. Things.

[0002]

2. Description of the Related Art Conventionally, a quick connector shown in FIG. 10 has been known and is configured as follows. In this quick connector, a plug 52 on the right side in the figure is removably inserted into a socket 51 on the left side in the figure to connect a fluid circuit or piping.

[0003] First, a socket 51 for holding a required number of hard balls 53 movably in the radial direction of the quick connector is provided, and a plug 52 can be inserted and removed axially from the right side in the figure inside this socket 51. The plug 52 is inserted into the outer surface of the plug 52 at the time of insertion.
There is provided a groove-shaped engaging portion 52a with which the. A hard ball 53 is provided outside the socket 51 according to the sliding position.
A slider 54 that restricts or permits radial movement of the slider 54 is mounted so as to be slidable in the axial direction.
Inside the socket 51, a groove-shaped engaging portion 51 provided in the socket 51.
The spring ring 55 that engages with a and separates from the engaging portion 51a when the diameter is expanded is held so as to be able to expand. The spring ring 55 is a C-shaped snap ring, which is cut at one place on the circumference, and a pair of ends 55a and 55b provided at the cut portion are bent outward, respectively. One of the ends 55a is the slider 5
4 is inserted into a round hole 54a provided in the slider 54, and the other end 55b is formed in a long hole 54 also provided in the slider 54.
b. The spring ring 55 is fitted into the engaging portion 51a of the socket 51 by the tightening force. At this time, both the engaging portion 51a of the socket 51 and the groove-shaped spring ring holding portion 54c provided on the slider 54 are provided. Are engaged in the axial direction. Therefore, at this time, the slider 54 cannot slide in the axial direction with respect to the socket 51, and the hard ball pressing portion 54d of the slider 54 presses the hard ball 53 from the outside thereof.
As a result, the hard ball 53 is engaged with the engaging portion 52a of the plug 52 to prevent the plug 52 from falling out of the socket 51.

FIG. 10 shows a state in which the plug 52 is inserted into the socket 51 and is prevented from coming off. To pull out the plug 52 from this state, first, the other end 55b of the spring ring 55 Is moved in the direction (A direction) away from one end 55a of the spring ring 55 in the elongated hole 54b by a finger or a jig. When the other end 55b of the spring ring 55 is moved in this manner, the spring ring 55 is temporarily expanded in diameter against its elasticity and disengages from the engaging portion 51a of the socket 51. It is housed in the spring ring holder 54c. Therefore, the slider 54 can be slid with respect to the socket 51 in the rear end direction (direction B) of the connector. When the slider 54 is slid until the slider 54 actually comes into contact with the stop ring 56, the hard ball holding portion of the slider 54 A hard-ball escape portion 54e is located outside the hard ball 53 instead of 54d. Hard ball escape part 5
4e, the inner diameter is set larger than the hard ball pressing portion 54d, so that the hard ball 53 is
2a. Therefore, in this state, when the plug 52 is pulled in the direction of pulling out from the socket 51 (direction C), the hard ball 53 moves to the outside of the connector and comes off the engaging portion 52a of the plug 52, and the retaining is released, and the plug 52 is released. It can be pulled out from the socket 51.

Further, the plug 52 is removed from the pulled-out state.
Is inserted into the socket 51 by a predetermined amount, and the slider 54 is slid with respect to the socket 51 in the distal direction (the C direction). When the hard ball pressing portion 54d of the slider 54 engages the hard ball 53 with the engaging portion 52a of the plug 52, The spring ring 55 engages with the engaging portion 51a of the socket 51 due to its elasticity, whereby the spring ring 55 returns to the state of FIG.

Therefore, according to the quick connector having the above structure, the plug 52 can be pulled out of the socket 51 by a simple operation of moving the other end 55b of the spring ring 55 and sliding the slider 54. The plug 52 can be inserted into the socket 51 to prevent it from falling off.

[0007] However, the above prior art has the following disadvantages.

That is, in the quick connector having the above-described structure, the stopper 51b for specifying the rear stop position of the slider 54 includes a groove-shaped stop ring holding portion 51c provided on the outer surface of the socket 51, and the stop ring holding portion 51c. And a stop ring 56 fitted to the stop ring. Therefore, if it is attempted to form the socket 51 by pressing only from a plate material without performing any cutting process in order to reduce the processing cost, the socket 51 deeply drawn into a tube shape from the plate material is removed from the continuous press machine, and roll bead processing is performed. Ring-shaped stop ring holder 51c by another process using another machine capable of beading or beading
Need to be processed. Therefore, it takes a lot of trouble and time for the molding, and it may not be possible to realize the initial goal or schedule of pressing the socket 51 to improve the productivity.

In the prior art, the groove-shaped stop ring holding portion 51c is provided on the outer surface of the socket 51, as described above, and the inward projection 51d is formed on the inside thereof, that is, on the inner surface of the socket 51. Is formed. A sealing member 57 such as an O-ring is mounted inside the socket 51 alongside the projection 51d. Therefore, when the plug 52 is inserted into the socket 51, the protrusion 51
The sealing member 57 is bitten between d and the plug 52,
There is a risk of causing breakage such as tearing.

[0010]

SUMMARY OF THE INVENTION In view of the above, the present invention has been devised so that the structure or shape of the socket, which is a component of the quick connector, can be easily processed, thereby improving the productivity. The purpose is to let them. Another object of the present invention is to provide a quick connector capable of preventing breakage of a seal member when the seal member is mounted inside the socket. In addition, a hard ball can be loaded with the slider attached to the socket, and the hard ball does not fall out of the connector after loading, so that the hard ball can be prevented from falling off and quick assembly can be improved. The purpose is to provide a connector.

[0011]

According to a first aspect of the present invention, there is provided a quick connector according to the first aspect of the present invention, wherein a stopper for specifying a rear stop position of a slider slidably disposed on the outer periphery of the socket is provided on the quick connector. And a stop ring holding portion having a structure in which the outer peripheral wall of the socket is folded back and a stop ring fitted to the slider side of the stop ring holding portion.

According to a second aspect of the present invention, there is provided the quick connector as set forth in the first aspect, wherein the hard ball for preventing the plug from coming out of the socket when the slider comes into contact with the stop ring and stops. In this case, the hard ball can pass between the socket and the slider when the slider comes into contact with the stop ring holding portion without the stop ring and stops without the stop ring.

[0013] As in the quick connector according to the first aspect of the present invention, the stopper for specifying the rear stop position of the slider protrudes outside the socket and has a structure in which the peripheral wall of the socket is folded back. And a stop ring fitted on the slider side of the stop ring holding portion, the socket is deep drawn from the plate material when the socket is formed by pressing only from the plate material without cutting. By performing the buckling process in a continuous process, it is possible to form the stop ring holding portion. Therefore, it is possible to omit a separate step of processing the groove-shaped stop ring holding portion by another machine after deep drawing as in the above-described prior art. Further, since no groove is provided on the outer surface of the socket, no inwardly projecting portion is formed on the inner surface of the socket.

[0014] In addition to this, as in the quick connector according to the second aspect of the present invention having the above structure, when the slider comes into contact with the stop ring and stops, the hard ball does not fall off the connector due to the slider. When the hard ball can pass between the socket and the slider when the slider comes into contact with the stop ring holding portion and stops without the ring, the hard ball can be loaded into the socket with the slider attached to the outer periphery of the socket. It is possible to prevent the hard ball from falling off the connector after loading. This is because the amount of slidable rearward of the slider varies depending on the presence or absence of the stop ring.

[0015]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 shows a cross section of a quick connector according to the embodiment. FIG. 2 is a sectional view taken along line DD of FIG.

In this quick connector, a plug 2 on the right side is removably inserted into a socket 1 on the left side in FIG. 1 to connect a fluid circuit or piping.
It is configured as follows.

First, there is provided a cylindrical socket 1 for holding a required number (six in this embodiment) of hard balls (steel balls) 3 so as to be movable in the radial direction of the connector. A cylindrical plug 2 is inserted into the inside of the socket 1 (inner peripheral side) from the right side in the figure so as to be able to be inserted and withdrawn in the axial direction. A mating groove-shaped engaging portion 2e is provided.

As shown in FIG. 3, the socket 1 has a large-diameter portion (also referred to as a large-diameter cylindrical portion) 1c from a front end portion (right end portion in the drawing) 1a to a rear end portion (left end portion in the drawing) 1b. A central portion (also referred to as a central cylindrical portion) 1d having a smaller diameter than the large-diameter portion 1c and a small-diameter portion (also referred to as a small-diameter cylindrical portion) 1e having a smaller diameter than the central portion 1d are integrally provided. A required number of hard-ball holding portions (also referred to as hard-ball holding holes or hard-ball holes) 1f for accommodating and holding the hard balls 3 one by one is provided in the large-diameter portion 1c on the distal end side. The hard ball holding portion 1f is provided with an annular groove-shaped engaging portion (also referred to as a spring ring groove) 1g on an outer surface on a rear end side thereof. The inner surface of the large-diameter portion 1c inside the groove-shaped engaging portion 1g. The inner peripheral surface), an annular projection 1h is provided by the provision of the engagement portion 1g. Further, between the large diameter portion 1c and the central portion 1d (boundary), a projection-shaped or flange-shaped stop ring holding portion (also referred to as a bent portion) 1i that projects outside the socket 1 and has a structure in which the peripheral wall of the socket 1 is folded back. A stopper 1 for specifying a rear stop position of the slider 6 by the stop ring holding portion 1i and a stop ring 10 described later.
k is configured. The protruding or flanged stop ring holding portion 1i can be easily formed by buckling in the process of continuous forming of the socket 1 by deep drawing from a plate material. Therefore, the socket 1 is not provided with a groove-shaped stop ring holding portion as in the above-described conventional technology, and is not provided with a projection inside the socket. Further, a tapered step portion 1 is provided between the central portion 1d and the small diameter portion 1e.
j is provided.

As shown in FIG. 4 in an enlarged manner, the hole-shaped hard sphere holding portion 1f allows the hard sphere 3 to move from the hard sphere holding portion 1f to the inside of the socket 1 when the plug 2 is not inserted into the inside of the socket 1. The inner wall is tapered with a predetermined angle θ so that it does not fall off. The opening diameter is larger than the diameter of the hard ball 3 on the outer surface side of the socket 1, and the hard ball 3 is formed on the inner surface side of the socket 1. It is set smaller than the diameter dimension. In addition, the hard ball 3 is moved from the hard ball holding portion 1f to the socket 1
In order to prevent the hard ball 3 from dropping inside, there are a method of forming a step on the inner wall of the hard ball holding portion 1f and a method of making a hole having a diameter slightly smaller than the diameter of the hard ball 3.

As shown in FIG. 5, the plug 2 has a large-diameter portion (also referred to as a large-diameter cylindrical portion) 2c from a front end portion (right end portion in the drawing) 2a to a rear end portion (left end portion in the drawing) 2b. A small-diameter portion (also referred to as a small-diameter cylindrical portion) 2d having a smaller diameter than the large-diameter portion 2c is integrally provided. A groove-shaped engaging portion 2e is provided. The large diameter portion 2c and the small diameter portion 2
1d, a tapered step 2f is provided between
As shown in (2), when the plug 2 is inserted into the inside of the socket 1, the step 2f comes into contact with the projection 1h provided on the inner surface of the socket 1 to stop the insertion. Therefore, when the step portion 2f comes into contact with the projection 1h, the engaging portion 2e is located inside the hard ball holding portion 1f and the hard ball 3 exactly. Also, at this time, the rear end portion 2b of the plug 2 is inserted up to the inside of the central portion 1d of the socket 1 with the front end thereof.

As shown in FIG. 1, an annular spacer 4 is mounted inside the socket 1 and on the rear end side of the projection 1h, and further on the rear end side of the spacer 4 is an annular spacer such as an O-ring. The seal member 5 is mounted. The spacer 4 is formed of a material such as resin into a rectangular cross section, and is located between the small diameter portion 2d of the plug 2 and the large diameter portion 1c of the socket 1 when the plug 2 is inserted inside the socket 1. Keep them concentric. The socket 4 has a sealing member 5.
There is also a function of protecting the sealing member 5 from being excessively deformed by being strongly sandwiched between the plug 2 and the socket 1 or strongly pressed by the sealing fluid pressure. As shown in FIG. 6, the spacer 4 is obliquely cut at one position on the circumference so that the spacer 4 can pass through the inside of the protrusion 1h of the socket 1 and be mounted on the rear end side. 4a is provided. The seal member 5 is formed of a material such as rubber, and seals a sealed fluid (also referred to as a transfer fluid) from the space between the plug 2 and the socket 1 so as not to leak outside. In FIG. 1, when a sealing fluid pressure acts from the left side of the seal member 5, the seal member 5 is pressed against the spacer 4 on the right side of the seal member 5, whereby the spacer 4 attempts to move rightward. By simultaneously contacting the portion 1h and the step 2f of the plug 2, the movement is stopped. Therefore, the spacer 4 is very stably mounted between the socket 1 and the plug 2.

As shown in FIG. 1, outside the socket 1,
A cylindrical slider 6 that restricts or permits the radial movement of the hard ball 3 in accordance with the sliding position is mounted so as to be slidable in the axial direction, and a groove-shaped groove provided in the socket 1 is provided inside the slider 6. A spring ring 9 that engages with the engaging portion 1g and comes off from the engaging portion 1g when the diameter is increased is held so that the diameter can be increased.

As shown in FIG. 2, the spring ring 9 is a snap ring having a C-shape, which is cut at one position on the circumference, and a pair of end portions 9 provided at the cut portion.
a and 9b are bent outward, one end 9a of which is inserted into a round hole (also referred to as a spring ring engaging portion) 6e provided in the slider 6, and the other end 9a. 9b is also inserted into an elongated hole (also referred to as a spring ring operating portion) 6f provided in the slider 6. The spring ring 9 is fitted into the engaging portion 1g of the socket 1 by its tension.
At this time, both the engaging portion 1g of the socket 1 and the groove-shaped spring ring holding portion 6a provided on the slider 6 are engaged in the axial direction. Therefore, at this time, the slider 6 cannot slide in the axial direction with respect to the socket 1, and the hard ball pressing portion 6 c of the slider 6 presses the hard ball 3 from the outside thereof. The plug 2 is locked from the socket 1 by engaging with 2e.

As shown in FIG. 7, the slider 6 has a groove-shaped spring ring holding portion (also referred to as a spring ring holding groove) 6a and a sliding portion slidably sliding with respect to the large diameter portion 1c of the socket 1. 6b, a hard ball pressing portion 6c for engaging the hard ball 3 with the engaging portion 2e of the plug 2, and a hard ball escape portion (also referred to as a hard ball escape portion) 6d for allowing the hard ball 3 to come off the engaging portion 2e of the plug 2. And is formed by a combination of first and second pressed parts 7 and 8 configured as follows.
Each of the first and second pressed parts 7 and 8 is an annular part pressed from a plate material by deep drawing.

First, the first pressed part 7 forming the outer surface of the slider 6 has a large-diameter portion (large-diameter cylindrical portion) from its front end (right end in the drawing) to its rear end (left end in the drawing). 7a), a central portion (also referred to as a central cylindrical portion) 7b having a smaller diameter than the large diameter portion 7a, and a small diameter portion (also referred to as a small diameter cylindrical portion) 7c having a smaller diameter than the central portion 7b. Are integrally provided, and a front end portion 7d of the large diameter portion 7a is bent outward to form an outward flange. Between large diameter portion 7a and central portion 7b and central portion 7b
And the small diameter portion 7c are tapered steps 7e,
7f is provided. The rear end 7g of the small diameter portion 7c is bent inward to form an inward flange, and the small diameter portion 7c is provided with a round hole 6e and a long hole 6f.

On the other hand, the second pressed part 8 forming the inner surface of the slider 6 has a large-diameter portion (also referred to as a large-diameter cylindrical portion) from its front end (right end in the drawing) to its rear end (left end in the drawing). 8a, a central portion (also referred to as a central cylindrical portion) 8b having a smaller diameter than the large diameter portion 8a, and a small diameter portion (also referred to as a small cylindrical portion) 8 having a smaller diameter than the central portion 8b.
c, the leading end 8d of the large diameter portion 8a winds around the leading end 7d of the first pressed part 7 as shown in the figure, and a projection-shaped or flange-shaped slide operation portion 6g is formed there. ing. A tapered step 8 is provided between the large diameter portion 8a and the central portion 8b and between the central portion 8b and the small diameter portion 8c.
e, 8f are provided. The rear end 8g of the small diameter portion 8c remains cylindrical, and the rear end 8g is
A groove-shaped spring ring receiving portion 6a having an inside opening, together with a small diameter portion 7c and an inwardly bent rear end portion 7g.
Forming a three-way wall. The second pressed part 8 is located at the center 8 of the second pressed part 8 at the hard ball holding part 6c.
b is fixed to the first pressed part 7 by being pressed into the center part 7b of the first pressed part 7, and is substantially connected to the first pressed part 7 together with the curling in the slide operation part 6g. It is integrated into. Since the small diameter portion 8c of the second pressed part 8 has the slide portion 6b formed on the inner surface thereof, the inner diameter of the small diameter portion 8c is set so as to slide with the large diameter portion 1c of the socket 1. Since the center portion 8b has a hard ball pressing portion 6c formed on the inner surface thereof, when the inner surface is located outside the hard ball 3, the hard ball 3 is engaged with the engaging portion 2 of the plug 2.
The inner diameter dimension is set so as to engage with e.
Further, since the large-diameter portion 8a is provided with a hard-ball escape portion 6d on its inner surface, the hard-ball 3 is allowed to come off from the engaging portion 2e of the plug 2 when the inner surface is located outside the hard ball 3. The inner diameter is set. However, since it is difficult for the hard ball 3 to drop off from the connector, the inner diameter is set so that the hard ball 3 is detached from the engaging portion 2e of the plug 2 but is not dropped from the hard ball holding portion 1f.

The groove-shaped spring ring holding portion 6a is formed so as to have a predetermined depth d and an axial width w, and the depth d is the inner diameter of the small diameter portion 7c of the first pressed part 7. It can be easily adjusted by appropriately changing the dimensions. Therefore, depending on the case, a gap 6h may be formed between the small-diameter portion 7c and the small-diameter portion 8c of the second pressed part 8 as shown in the drawing (there may be no such gap). In addition, the axial width w can be changed by appropriately changing the axial length of the small-diameter portion 8c of the second pressed part 8 or changing the axial length of the small-diameter portion 7c of the first pressed part 7 to change the axial length of the rear end 7g. The adjustment can be easily made by appropriately changing the direction position. Incidentally, the slider 6 may be a single piece as shown in FIG.

As shown in FIG. 1, the large diameter portion 1 of the socket 1
A stop ring 10 is fitted on the outer periphery of the stop ring c on the slider 6 side (tip side) of the stop ring holding portion 1i. As described above, the stop ring holding portion 1i and the stop ring 10 cause the rear of the slider 6 to be fitted. A stopper 1k for specifying the stop position is configured. The stop ring 10 is a C-shaped snap ring, and is fitted on the outer periphery of the socket 1 by its tightening force. The stop ring 10 is backed up by the stop ring holding portion 1i, and the sliding slider 6
Stops at a position where it hits the hard ball escape portion 6d of the slider 6 and does not fall off the connector. On the other hand, FIG.
When the slider 6 directly abuts the stop ring holding portion 1i and stops without the stop ring 10, the hard ball 3 can pass between the socket 1 and the slider 6, as shown in FIG. Therefore, when assembling the connector, the slider 6 is slid without the stop ring 10 until it comes into contact with the stop ring holding portion 1i. In this state, the hard ball 3 is loaded into the hard ball holding portion 1f of the socket 1, and after the loading, the stop ring 10 is connected to the socket. 1 is fitted. Accordingly, the hard ball 3 can be loaded into the socket 1 with the slider 6 attached to the outer periphery of the socket 1, and the stop ring 10 is fitted to the socket 1 after loading to limit the sliding amount of the slider 6. Thereby, the hard ball 3 can be prevented from falling off from the connector.

FIG. 1 shows a state in which the plug 2 is inserted into the socket 1 and is prevented from falling out. In order to pull out the plug 2 from this state, first, the other end 9b of the spring ring 9 is finger- or healed. The spring ring 9 is moved in a direction away from one end 9a of the spring ring 9 in the elongated hole 6f (direction A). When the other end 9b of the spring ring 9 is moved away from the one end 9a in the elongated hole 6f in this manner, the diameter of the spring ring 9 is temporarily expanded against its elasticity, so that the socket 1 Are disengaged from the engaging portions 1g, and all of them are accommodated in the spring ring holding portions 6a of the slider 6. Therefore, the slider 6 is connected to the socket 1
9 can be slid in the rear end direction (B direction) of the connector. When the connector is slid until it actually comes into contact with the stop ring 10 as shown in FIG. The hard ball escape portion 6d is located outside the hard ball 3 instead of 6c. Therefore, in this state, when the plug 2 is pulled in the direction of pulling out from the socket 1 (direction C), the hard sphere 3 moves to the outside of the connector and comes off from the engaging portion 2e of the plug 2 to release the stopper. It can be pulled out of the socket 1.

From the pulled-out state, the plug 2 is inserted into the socket 1 until the step 2f of the plug 2 comes into contact with the projection 1h of the socket 1, and the slider 6 is slid with respect to the socket 1 in the tip direction (direction C). The hard ball pressing portion 6c of the slider 6 engages the hard ball 3 with the engaging portion 2e of the plug 2 and the spring ring 9 engages with the engaging portion 1g of the socket 1 due to its elasticity. The lock is locked again after returning to.

Therefore, according to the quick connector having the above structure, the plug 2 can be pulled out of the socket 1 by a simple operation of moving the other end 9b of the spring ring 9 and sliding the slider 6. The plug 2 can be inserted into the socket 1 to prevent it from falling off.

The above-described quick connector has the following functions and effects due to the above configuration.

That is, first, a stopper 1k for specifying the rear stop position of the slider 6 protrudes outside the socket 1 and the peripheral wall of the socket 1 is folded back. Since the socket 1 is formed by a stop ring 10 formed of a snap ring or the like fitted on the slider 6 side of the portion 1i, the socket 1 is formed only by pressing from a plate material without cutting. The stop ring holding portion 1i can be formed by buckling in a continuous process of deep drawing from a plate material. Therefore, it is possible to omit a separate step of forming the groove (groove-shaped stop ring holding portion) by another machine after deep-drawing the plate material as in the above-described prior art, and the manufacturing of the socket 1 is facilitated accordingly. And the manufacturing cost can be reduced. The structure of the stop ring holding portion 1i, which protrudes outside the socket 1 and has the peripheral wall of the socket 1 turned back, has a shape in which the socket 1 is buckled outward at a part thereof.

Further, since a groove (a groove-shaped stop ring holding portion) is not provided on the outer surface of the socket 1 unlike the above-described conventional technique, no inwardly protruding portion is formed on the inner surface of the socket 1. Therefore, when the plug 2 is inserted into the socket 1, it is possible to prevent the sealing member 5 made of an O-ring or the like from being caught and damaged between the projection and the plug 2.

Further, in the above-mentioned prior art, since the socket 1 has a shape in which the socket 1 is once expanded and the side is pushed inward in the opposite direction, the mandrel can be applied only to one side of the curve, and distortion is caused on the side where the diameter is increased. Although the workability was poor and the workability was not good, a uniform finished state can be obtained by adopting the above shape, and the productivity of the socket 1 can be improved.

When the slider 6 comes into contact with the stop ring 10 and stops when the stop ring 10 is fitted to the socket 1, the hard ball 3 hits the hard ball escape portion 6d of the slider 6 and does not fall off the connector. At the same time, when the slider 6 comes into contact with the stop ring holding portion 1i and stops in a state where the stop ring 10 is not fitted to the socket 1, the hard ball 3 can pass between the socket 1 and the slider 6. Therefore, based on the difference in the slidable amount of the slider 6 depending on the presence or absence of the stop ring 10, it is possible to load the hard ball 3 into the hard ball holding portion 1f of the socket 1 in a state where the slider 6 is assembled to the socket 1, Moreover, it is possible to prevent the hard ball 3 from passing through the space between the socket 1 and the slider 6 and dropping from the connector after the loading. That. Therefore, it is possible to improve the assemblability of the connector while ensuring that the hard balls 3 do not fall off.

[0038]

The present invention has the following effects.

That is, in the quick connector according to the first aspect of the present invention having the above structure, the stopper for specifying the rear stop position of the slider projects out of the socket and has a structure in which the peripheral wall of the socket is turned back. When the socket is formed only by pressing from a plate material without cutting, the socket is formed by the plate material because the stop ring is formed by the ring holding portion and the stop ring fitted to the slider side of the stop ring holding portion. It is possible to form the stop ring holding portion by buckling in a continuous process of deep drawing from below. Therefore, it is possible to omit a separate process in which a groove is machined by another machine after deep-drawing the plate material, thereby facilitating the manufacture of the socket and reducing the manufacturing cost.

Since no groove is provided on the outer surface of the socket, no inwardly projecting portion is formed on the inner surface of the socket. Therefore, when the plug is inserted into the socket, it is possible to prevent the seal member from being caught and damaged between the projection and the plug.

In addition to the above, in the quick connector according to the second aspect of the present invention having the above structure, when the slider comes into contact with the stop ring and stops, the hard ball does not fall off the connector due to the slider. Since the hard ball can pass between the socket and the slider when the slider comes into contact with the stop ring holding part and stops without it, the socket can be moved based on the difference in the slideable amount of the slider depending on the presence or absence of the stop ring. It is possible to load a hard ball into the hard ball holding portion of the socket with the slider mounted on the socket, and it is possible to prevent the hard ball from passing through the space between the socket and the slider and dropping off from the connector after the loading. . Therefore, it is possible to improve the assemblability of the connector while ensuring that the hard balls do not fall off.

[Brief description of the drawings]

FIG. 1 is a sectional view of a quick connector according to an embodiment of the present invention.

FIG. 2 is a sectional view taken along line DD in FIG.

FIG. 3 is a sectional view of a socket.

FIG. 4 is an enlarged view of a hard ball holding unit and a hard ball.

FIG. 5 is a sectional view of a plug.

FIG. 6 is a side view of a spacer.

FIG. 7 is a sectional view of a slider.

FIG. 8 is a sectional view showing an assembly process of the connector.

FIG. 9 is a sectional view showing the operation procedure of the connector.

FIG. 10 is a sectional view of a connector according to a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Socket 1i Stop ring holding part 1k Stopper 2 Plug 3 Hard ball 4 Spacer 5 Seal member 6 Slider 7 First pressed part 8 Second pressed part 9 Spring ring 10 Stop ring

Claims (2)

[Claims] A stopper (1k) for specifying a rear stop position of a slider (6) slidably disposed on an outer periphery of the socket (1) projects outside the socket (1) and the socket (1). ), A stop ring holding portion (1i) having a structure in which the peripheral wall is folded, and a stop ring (10) fitted to the slider (6) side of the stop ring holding portion (1i). Quick connector. 2. A hard connector (3) according to claim 1, wherein when the slider (6) comes into contact with the stop ring (10) and stops, the hard ball (3) for preventing the plug (2) from coming off the socket (1). The slider (6) does not fall off the connector when hitting the slider (6), and the slider (6) does not have the stop ring (10).
A quick connector characterized in that the hard ball (3) can pass between the socket (1) and the slider (6) when the abutment stops against the stop ring holding portion (1i).