JP2000097383A - Slider for quick connector - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve productivity by a method wherein the structure and the shape of a slider being the constitutional part of a quick connector are easily processed. SOLUTION: Through engagement of a rigid ball 3, slip-off of a plug 2 from a socket 1 is prevented from occurring, and movement of the rigid ball 3 is limited by a slider 6 slidably arranged on the outer periphery of the socket 1, and movement of the slider 6 is limited by a spring ring 9 expandably fitted in the outer periphery of the socket 1. In this case, through combination of first and second parts 7 and 8, a spring holding part 6a to expandably hold the spring ring 9 consists of the first press part 7 to internally bend a rear end part 7b and the second press part 8.arranged on the inner side of the first press part 7.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is used for a pneumatic circuit, a hydraulic circuit or a hydraulic circuit of an air tool, panel piping or pneumatic equipment, etc., and is used for a quick connector which can be quickly operated when connecting or disconnecting the circuit. Related to the slider.

[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 slider 54 slidably disposed outside the socket 51 is formed by a single component as shown in FIG. A curved portion 54f having an arcuate cross section for forming the spring ring holding portion 54c, a sliding portion 54g that slides with respect to the socket 51, and a hard ball pressing portion that engages the hard ball 53 with the engaging portion 52a of the plug 52 54d and the hard ball 53 are plug 5
2 is provided integrally with a hard-ball escape portion 54e that allows the engagement portion 52a to come off from the engagement portion 52a.
4a and a long hole 54b are provided. Therefore, if the slider 54 is to be formed from a plate material only by press working without any cutting work in order to reduce the working cost, a mandrel (e.g., a mandrel) is required to form a round hole 54a and a long hole 54b in the curved portion 54f. (Not shown) must be split. However, since the durability of the mandrel decreases as the inner diameter of the slider 54 decreases, the number of replacements and the time are required, and the initial goal or schedule of press working the slider 54 to improve the productivity is considered. It may not be possible.

[0009]

SUMMARY OF THE INVENTION In view of the above, the present invention has been devised so that the structure or shape of the slider, 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 in which the strength of the slider is high or the operability of the slider is good.

[0010]

In order to achieve the above object, a slider for a quick connector according to the first aspect of the present invention prevents a plug from falling out of a socket by engagement of a hard ball, and is slidable on the outer periphery of the socket. A slider used for a quick connector that restricts the movement of the hard ball by a slider that is arranged and that restricts the movement of the slider by a spring ring that is fitted to the outer periphery of the socket so as to be able to expand in diameter. The first press part, which is formed by a combination of two press parts and has a rear end portion bent inward, and the second press part disposed inside the first press part, holds the spring ring so as to be able to expand. The spring ring holding part is formed.

According to a second aspect of the present invention, there is provided the slider for a quick connector according to the first aspect of the present invention, wherein the hard ball is engaged with the engaging portion of the plug when located outside the hard ball. It has a hard ball holding part, in which the second pressed part is press-fitted and fixed to the first pressed part.

According to a third aspect of the present invention, there is provided the slider for a quick connector according to the first aspect of the present invention, wherein the tip of the second pressed part is formed in a projecting shape by winding the tip of the first pressed part. It is decided that the slide operation section is provided.

[0013] Like the slider for a quick connector according to the first aspect of the present invention having the above-mentioned structure, the slider comprises a combination of first and second pressed parts which are pressed from a sheet material by deep drawing, When the spring ring holding portion is formed by the first pressed part whose rear end is bent inward and the second pressed part disposed inside the first pressed part, the slider has a circular cross section as in the prior art. The spring ring holding portion can be formed without providing the arc-shaped curved portion. Therefore, since there is no curved portion, it is not necessary to use a split mold for the mandrel for drilling, so that the strength of the mandrel can be increased and the required hole shape can be formed without distortion.

[0014] In addition to this, as in the slider for a quick connector according to the second aspect of the present invention having the above structure, a hard ball retainer for engaging the hard ball with the engaging portion of the plug when located outside the hard ball. When the second pressed part is press-fitted and fixed to the first pressed part in the hard ball holding part, the rigidity of the slider is extremely increased. Therefore, it is possible to prevent the inner surface of the slider from being plastically deformed into a concave shape due to the floating of the hard sphere due to the sealing fluid pressure.

[0015] Further, according to the present invention having the above configuration,
Like the slider for a quick connector, when the leading end of the second pressed part is wound around the leading end of the first pressed part and provided with a protrusion-like slide operating part, the slider is gripped and the slider is slid. By doing so, the operability of the slider can be improved.

[0016]

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 provided with a slider according to the embodiment. FIG. 2 shows FIG.
FIG. 4 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 the present embodiment) of hard balls (steel balls) 3 movably 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, and a hard ball 3 is engaged with the outer surface (outer peripheral surface) of the plug 2 when inserted. 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. Incidentally, the stopper 1k may be composed of a groove-shaped stop ring holding portion as shown in FIG. 10 and a stop ring fitted to this.

As shown in enlarged form in FIG. 4, the hole-shaped hard sphere holding portion 1f is provided so that when the plug 2 is not inserted into the inside of the socket 1, the hard sphere 3 moves from the hard sphere holding portion 1f to 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 this spacer 4 is an annular ring 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 slidable 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.

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 must be 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.

Further, from the pulled-out state, the plug 2 is inserted into the socket 1 until the step 2f thereof 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 slider 6 provided in the quick connector has the following functions and effects due to the above configuration.

That is, first, since the slider 6 has a combined structure of the first and second pressed parts 7 and 8, it has been difficult to machine a single plate with a deep drawing with high precision. Processing of the ring holding portion 6a and processing of the round hole 6e and the long hole 6f can be performed relatively easily. Further, since both the first and second pressed parts 7 and 8 are formed into a shape that can be machined from a plate material by deep drawing, they can be machined in a short time and at low cost. Further, since the spring ring holding portion 6f can be formed without providing a curved portion having an arc-shaped cross section as in the prior art, it is necessary to use a split mold for a mandrel (not shown) for drilling. Therefore, the strength of the mandrel can be increased, and the required hole shape can be formed without distortion.

Further, the two-piece hard ball pressing portion 6c composed of the first and second pressed parts 7, 8 has a press-fitting structure, so that the thickness of the hard ball pressing portion 6c is substantially increased. It is possible to increase its rigidity.
Accordingly, it is possible to prevent the inner surface of the slider 6 from being plastically deformed into a concave shape due to the floating of the hard sphere 3 due to the sealing fluid pressure.

Further, since the leading end 8d of the second pressed part 8 winds around the leading end 7d of the first pressed part 7, a protruding slide operation part 6g is provided at the leading end of the slider 6. The operability of the slider 6 can be improved by gripping the operation portion 6g and sliding the slider 6.

[0038]

The present invention has the following effects.

That is, first, in the slider for a quick connector according to the first aspect of the present invention having the above-described structure, since the slider has a combined structure of the first and second pressed parts, the conventional one-piece plate is used. Processing of the spring ring holding portion, which has been difficult to perform with high precision by deep drawing, can be performed relatively easily. In addition, since both the first and second pressed parts are formed into a shape that can be processed by deep drawing from a plate material, these can be processed in a short time and at low cost. Further, since the spring ring holding portion can be formed without providing a curved portion having an arc-shaped cross section as in the above-described conventional technology, it is not necessary to use a split mold for the mandrel for drilling. And the required hole shape can be formed without distortion.

In addition to the above, in the slider for a quick connector according to the second aspect of the present invention having the above-described structure, the two-piece hard ball holding portion composed of the first and second pressed parts has a press-fitting structure. By doing so, it is possible to substantially increase the plate thickness of the hard ball holding portion and increase its rigidity. Therefore, it is possible to prevent the inner surface of the slider from being plastically deformed into a concave shape due to the floating of the hard sphere due to the sealing fluid pressure.

Further, the present invention having the above-mentioned structure is characterized by claim 3 of the present invention.
In the slider for a quick connector, the tip of the second pressed part is wound around the tip of the first pressed part, so that a protrusion-shaped slide operating part is provided at the tip of the slider. By gripping and sliding the slider, the operability of the slider can be improved.

[Brief description of the drawings]

FIG. 1 is a sectional view of a quick connector having a slider 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 2 Plug 2e Engagement part 3 Hard ball 4 Spacer 5 Seal member 6 Slider 6a Spring ring holding part 6c Hard ball holding part 7 First pressed part 7d, 8d Tip part 7g Rear end part 8 Second pressed part 9 Spring ring 10 Stop ring

Claims (3)

[Claims] 1. A plug (2) is prevented from falling out of a socket (1) by engagement of a hard ball (3), and the hard ball (3) is slidably disposed on an outer periphery of the socket (1) by a slider (6). A slider (6) used in a quick connector for restricting the movement of the slider (6) by a spring ring (9) fitted to the outer periphery of the socket (1) so as to be able to expand in diameter. A first pressed part (7) having a combination of first and second pressed parts (7) and (8), and having a rear end (7g) bent inward, and an inner side of the first pressed part (7). A spring for a quick connector, wherein a spring ring holding portion (6a) for holding the spring ring (9) so as to be able to expand in diameter is formed by a second press part (8) arranged in the slider. 2. The slider for a quick connector according to claim 1, wherein the hard ball presser engages with the engaging portion of the plug when the hard ball is located outside the hard ball. (6c) A slider for a quick connector, wherein the second pressed part (8) is press-fitted and fixed to the first pressed part (7) at the hard ball holding part (6c). 3. The slider for a quick connector according to claim 1, wherein the tip end (8d) of the second pressed part (8) winds around the tip end part (7d) of the first pressed part (7). A slider for a quick connector, characterized in that a slider (6g) is provided.