Quick connector

Abstract

The utility model provides a quick connector, the outer side of a male connector is provided with a convex body, the convex body is provided with an inclined pushing surface and a positioning surface, a female connector is provided with a plurality of first through holes and a plurality of second through holes, and the first through holes and the second through holes penetrate through the peripheral side of the front section of the female connector in a front-back staggered mode. A first steel ball and a second steel ball are respectively arranged in the female joint, the female joint comprises a female joint front shell, a female joint rear shell connected with the female joint front shell and an outer sliding sleeve, and the outer sliding sleeve is slidably sleeved outside the female joint front shell and a spring arranged on the female joint front shell. The first steel ball and the second steel ball which are axially staggered are sequentially pushed by the pushing face of the convex body of the male connector, then the outer sliding sleeve is driven to move towards the direction of the female head rear shell to achieve self-unlocking, the first steel ball is pushed to the positioning face of the convex body, and the outer sliding sleeve is pushed to reset through the spring so as to abut against the first steel ball to be locked with the first steel ball. Therefore, good locking stability and self-unlocking during connection are achieved.

Description

Technical Field

[0001] The utility model relates to a quick connector, in particular to a quick connector which can achieve self-unlocking when connected and has good locking stability. Background Art

[0002] Quick connectors are often used in liquid or gas transportation. Generally, existing quick connectors are designed to be quickly disconnected or quickly connected by matching a male connector and a female connector for connecting the pipeline, and the basic structure of the male and female connectors usually uses a steel ball clamping method to maintain the fixed state between the male and female connectors.

[0003] However, the existing quick connector uses a single-row steel ball as a locking structure, so when the ring of the female connector is unlocked, it is still necessary to manually move the ring backward to unlock the steel ball. This one-step unlocking stroke is short, which may lead to safety hazards such as loose connection and easy loosening. Because the connection mainly relies on the ring of the female connector to press the steel ball arranged inside it to be fixed on the arc concave surface of the male connector, the ring of the locked female connector may easily move backward, loosen and unlock itself due to part tolerance or strong vibration, resulting in the ring of the female connector being unable to press the steel ball inside it to be fixed on the arc concave surface of the male connector, thereby causing the male connector to be separated from the outside of the female connector, resulting in the problem that the male and female connectors are easy to loosen after being connected and are easy to get stuck when connected.

[0004] Therefore, how to solve the problems and defects of the quick connectors being easily loosened after connection and not being able to unlock automatically after connection is the direction that the inventor of the present case and the relevant practitioners in this industry are eager to study and improve. Utility Model Content

[0005] In order to effectively solve the above problems, the purpose of the utility model is to provide a design in which a convex body arranged on the outer side of the male connector cooperates with a plurality of first and second steel balls arranged in a front and rear staggered manner on the circumferential side of the front section of the female connector to achieve a good locking stability and a quick connector that allows the outer sleeve to achieve self-unlocking during the connection process.

[0006] In order to achieve the above object, the utility model provides a quick connector, characterized in that it includes:

[0007] A male connector, comprising a male connector body, a first passage is provided through the male connector body, a male valve core and a first spring are provided in the first passage, the male valve core is located in the front end of the male connector body, the first spring abuts between the male valve core and the rear end inner wall of the male connector body, a convex body is provided on the outer side of the male connector body, the convex body has an inclined push surface and an inclined positioning surface, the push surface and the positioning surface are inclined toward the front and rear end directions of the male connector body respectively;

[0008] A female connector, comprising a female front shell, a female rear shell and an outer sleeve, the female front shell having a plurality of first through holes and a plurality of second through holes, the first through holes and the second through holes respectively passing through the front section circumference of the female front shell in a front-to-back offset manner, a first steel ball and a second steel ball located behind the first steel ball are respectively arranged in the first through hole and the second through hole, and a second spring is sleeved on the outside of the female front shell, the female front shell and the female rear shell are connected to each other and jointly define a second channel connecting the first through holes and the second through holes, a movable valve core, a fixed core shaft and a third spring are arranged in the second channel, the fixed core shaft is connected to the female rear shell, the movable valve core is movably sleeved on the outside of the fixed core shaft, the third spring abuts between the movable valve core and the bottom of the fixed core shaft, and the outer sleeve is slidably sleeved on the outside of the female front shell and the second spring;

[0009] After the male connector and the female connector are engaged, the first steel ball and the second steel ball of the female connector are pushed in sequence by the pushing surface of the convex body of the male connector body, so as to drive the outer sleeve to move toward the rear shell of the female connector by a first stroke and a second stroke in sequence. The first steel ball is pushed against the positioning surface by the convex body, and the outer sleeve is pushed back to its original position by the second spring to press the first steel ball and lock it, so that the male connector and the female connector are engaged and the first channel and the second channel are connected.

[0010] The quick connector, wherein: the male connector body is provided with a plug-in portion, a male seat portion and a male connecting portion, the plug-in portion and the male connecting portion are respectively located at the front and rear sections of the male connector body, the male seat portion is located at the middle section of the male connector body, the rear side of the male seat portion is provided with a first annular groove, a first sealing body is arranged in the first annular groove, a groove is defined between the front side of the male seat portion and the convex body relative to it, and the first steel ball and the second steel ball are arranged in the groove.

[0011] The quick connector, wherein: the outer sleeve has a front section and a rear section and both ends are open, the inner side surface of the front section is provided with an inclined push surface and a flat rest surface, the push surface is inclined outward from the inner side of the front section of the outer sleeve toward the rear section to connect to the flat rest surface, the push surface and the flat rest surface are respectively in contact with and abut against the first steel ball and the second steel ball, the inner side wall between the front section and the rear section has a limiting portion, and the second spring abuts between the limiting portion and the front end of the female head rear shell.

[0012] The quick connector, wherein: the front and rear ends of the male connector body are respectively provided with a first opening and a first connecting port, the first opening and the first connecting port are respectively connected to the first channel, the male valve core is accommodated in the first opening, and a second annular groove is provided on the outer side of the male valve core, and a second sealing body for providing sealing is arranged in the second annular groove.

[0013] The quick connector, wherein: the outside of the female head front shell is provided with a plurality of external threads, the front section inner wall surface of the female head rear shell is provided with a plurality of internal threads, the female head front shell is screwed and assembled with the internal threads in the female head rear shell through the external threads, and a third sealing body is provided between the rear end of the female head front shell and the inner bottom surface of the female head rear shell to provide sealing.

[0014] The quick connector, wherein: a first groove and a second groove are respectively provided on the outer sides of the fixed core shaft and the movable valve core, a third groove is provided on the inner wall of the front section of the female head front shell, the first groove, the second groove and the third groove respectively accommodate a fourth sealing body, a fifth sealing body and a sixth sealing body in sequence, the fourth sealing body is located between the fixed core shaft and the movable valve core to provide sealing, the fifth sealing body and the sixth sealing body are located between the movable valve core and the inner wall of the female head front shell to provide sealing.

[0015] The quick connector, wherein: the first through hole and the second through hole are formed through the circumferential side of the female head front shell along the circumferential direction and at positions not on the same circumference.

[0016] The locking design of the male connector protrusion and the front circumference of the female connector in the utility model is matched with the first and second steel balls staggered forward and backward, so that the locking stability can be improved, and the outer sleeve can achieve the effect of self-unlocking during the connection between the male and female connectors. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1A It is a schematic diagram of a three-dimensional decomposition of the utility model.

[0018] Figure 1B This is a schematic diagram of another perspective of the three-dimensional decomposition of the present invention.

[0019] Figure 2A It is a cross-sectional schematic diagram of the male connector and the female connector of the utility model.

[0020] Figure 2B The utility model is a cross-sectional schematic diagram of the male connector and the female connector in the use state of being connected.

[0021] Figure 2C It is a schematic diagram of the operating state of the utility model in which the protrusion of the male connector pushes the first steel ball of the female connector to drive the outer sliding sleeve to move a first stroke.

[0022] Figure 2D It is a schematic diagram of the operating state in which the protrusion of the male connector of the utility model pushes the second steel ball of the female connector to drive the outer sliding sleeve to move a second stroke.

[0023] Figure 2E It is a cross-sectional schematic diagram of the male connector and the female connector of the utility model in a connected and locked state.

[0024] Explanation of reference numerals: quick connector 1; male connector 2; male connector body 21; plug-in portion 211; male seat portion 212; first annular groove 2121; male connection portion 214; external thread 2141; protrusion 215; push surface 215a; positioning surface 215b; groove 216; first opening 217; first connection port 218; first channel 219; male valve core 220; second annular groove 221; first spring 222; first and second sealing bodies 223 and 224; female connector 3; female front shell 31; second opening 311; third opening 312; first through hole 313; second through hole 314; second spring 315; external thread 316; first A steel ball 317; a second steel ball 318; a third groove 319; a female rear shell 32; an external thread 320; an internal thread 321; a docking port 322; a second connection port 323; a second channel 324; a movable valve core 325; a second groove 325a; a fixed mandrel 326; a mandrel base 327; a through hole 327a; a mandrel shaft 328; a mandrel head 329; a first groove 329a; a third spring 330; an outer sleeve 33; a front section 331; a thrust surface 331a; a flat surface 331b; a rear section 332; a limiting portion 333; a third annular groove 341; third, fourth, fifth, sixth, and seventh sealing bodies 35, 36, 37, 38, and 39. DETAILED DESCRIPTION

[0025] The above-mentioned purpose and the structural and functional characteristics of the present invention will be described based on the preferred embodiments of the accompanying drawings.

[0026] The utility model provides a quick connector, please refer to Figure 1A , Figure 1B , Figure 2A The quick connector 1 can be used for water cooling, gas or hydraulic pipe connectors, and includes a male connector 2 and a female connector 3. In this embodiment, the end of the male connector 2 and the female connector 3 correspondingly connected is defined as the front end, and the other end opposite to the male connector 2 is defined as the rear end.

[0027] The male connector 2 comprises a male connector body 21, the male connector body 21 is provided with a plug-in portion 211, a male seat portion 212 and a male connection portion 214, the plug-in portion 211 and the male connection portion 214 respectively protrude outward from the front and rear sides of the male seat portion 212. A convex body 215 is provided on the outer side of the male connector body 21, the convex body 215 is arranged on the outer side of the plug-in portion 211, and the convex body 215 has an inclined push surface 215a and an inclined positioning surface 215b, the push surface 215a and the positioning surface 215b are respectively formed from both sides of a plane of the top surface of the convex body 215 towards the front and rear end directions of the male connector body 21, and the inclination direction of the push surface 215a is different from the inclination direction of the positioning surface 215b.

[0028] The outer side of the male connector 214 is provided with a plurality of external threads 2141, which can be screwed together with the internal threads provided on a gas or liquid pipeline (not shown in the figure) to form a connection. A groove 216 is defined between the front side of the male seat 212 and the convex body 215, and a first annular groove 2121 is provided on the rear side of the male seat 212. A first sealing body 223 is provided in the first annular groove 2121. The first sealing body 223 provides sealing between the pipeline to prevent leakage.

[0029] See also Figure 1A , Figure 1B , Figure 2A , Figure 2B As shown, the front and rear ends of the male connector body 21 are respectively provided with a first opening 217 and a first connection port 218, the first connection port 218 is connected and communicated with a pipeline (not shown in the figure), and a first passage 219 is provided through the male connector body 21, the first passage 219 is located between the first opening 217 and the first connection port 218 and communicates with each other. A male valve core 220 and a first spring 222 are provided in the first passage 219, the male valve core 220 is located in the first opening 217 at the front end of the male connector body 21, a second annular groove 221 is provided on the outer side of the male valve core 220, a second sealing body 224 is provided in the second annular groove 221, and the second sealing body 224 provides sealing between the male valve core 220 and the inner wall surface of the male connector body 21. The first spring 222 is located between the male valve core 220 and the rear end inner wall of the male connector body 21 and abuts against each other. The elastic force of the first spring 222 supports the male valve core 220 to reciprocate in a straight line (axially forward and backward) in the first channel 219.

[0030] The female connector 3 comprises a female front shell 31, a female rear shell 32 and an outer sleeve 33. The front and rear ends of the female front shell 31 are respectively provided with a second opening 311 and a third opening 312. The female front shell 31 has a plurality of first through holes 313 and a plurality of second through holes 314. The first and second through holes 313 and 314 are respectively staggered in front and rear and penetrate the front circumference of the female front shell 31, that is, the first through holes 313 and the second through holes 314 are formed along the circumferential direction and at positions not on the same circumference on the front circumference of the female front shell 31. In the present embodiment, the first through hole 313 on the female front shell 31 is located in front of the second through hole 314, the first through hole 313 is located closer to the second opening 311 of the female front shell 31, and the second through hole 314 is not on the same straight line with the first through hole 313.

[0031] A first steel ball 317 and a second steel ball 318 are respectively disposed in the first through hole 313 and the second through hole 314. The first and second steel balls 317 and 318 are axially staggered in double rows on the front side of the front shell 31 of the female head, so as to provide two-stage unlocking of the outer sleeve 33 and improve the force transmission efficiency of unlocking the outer sleeve 33, and at the same time ensure the effect of increasing the unlocking stroke. A second spring 315 and a plurality of external threads 316 are disposed on the outside of the female head front shell 31. The external threads 316 are formed on the outside of the female head front shell 31. The second spring 315 is sleeved on the outside of the female head front shell 31 between the second steel ball 318 and the external threads 316.

[0032] The front and rear ends of the female rear shell 32 are respectively provided with a pair of interfaces 322 and a second connection port 323. The interface 322 of the female rear shell 32 is combined with the rear section of the corresponding female front shell 31. The second connection port 323 is connected and communicated by a plurality of external threads 320 provided on the outer side of the rear section of the female rear shell 32 and an internal thread provided on another gas and liquid pipeline (not shown in the figure). The inner wall surface of the front section of the female rear shell 32 is provided with a plurality of internal threads 321. The female rear shell 32 is screwed and assembled with the external threads 316 of the female front shell 31 through the internal threads 321 therein, so that the female front shell 31 and the female rear shell 32 are connected to each other as a whole and jointly define a second channel 324. The second channel 324 is connected to the second and third openings 311, 312 of the female front shell 31 and the second connection port 323 and the first and second through holes 313, 314.

[0033] In addition, a third sealing body 35 is further provided between the rear end of the female head front shell 31 and the inner bottom surface of the female head rear shell 32, and the third sealing body 35 provides sealing to prevent liquid (gas) leakage. A third annular groove 341 is provided on the rear side of the female head rear shell 32, and a seventh sealing body 39 is provided in the third annular groove 341, and the seventh sealing body 39 provides sealing between another pipeline to prevent leakage.

[0034] See also Figure 1A , Figure 2A , Figure 2B A movable valve core 325, a fixed core shaft 326 and a third spring 330 are arranged in the second channel 324. The fixed core shaft 326 has a core shaft base 327, a core shaft shaft body 328 and a core shaft head 329. The front end and the rear end of the core shaft shaft body 328 are respectively connected to the core shaft head 329 and the core shaft base 327. A plurality of through holes 327a are opened on the core shaft base 327. The through holes 327a are formed through the core shaft base 327 to connect the second channel 324 and the second connecting port 323. The core shaft base 327 of the fixed core shaft 326 is fixed to the inner bottom surface of the female rear shell 32 and is connected. The core shaft head 329 is located in the second channel 324 at the middle section of the female front shell 31, and a first groove 329a is provided on the outer side of the core shaft head 329. A fourth sealing body 36 is disposed in the first groove 329a. The fourth sealing body 36 is located between the core shaft head 329 of the fixed core shaft 326 and the movable valve core 325 to provide sealing.

[0035] The third spring 330 is sleeved on the mandrel shaft 328, and the third spring 330 is arranged between the mandrel base 327 of the fixed mandrel 326 and the movable valve core 325 to abut against each other. The movable valve core 325 is movably sleeved on the outside of the fixed mandrel 326, and the elastic force of the third spring 330 is used to support the movable valve core 325 to reciprocate in the second channel 324 in a straight line (forward and backward along the axial direction), and a second groove 325a is provided on the outer side of the movable valve core 325, and a fifth sealing body 37 is arranged in the second groove 325a, and the fifth sealing body 37 is located between the movable valve core 325 and the inner wall of the female head front shell 31 to provide sealing. A third groove 319 is further provided on the inner wall of the front section of the female front shell 31. The third groove 319 accommodates a sixth sealing body 38. The sixth sealing body 38 is located between the movable valve core 325 and the inner wall of the female front shell 31 to provide sealing when the plug-in portion 211 of the male connector 2 is connected to the female connector 3, so as to ensure that there is no risk of leakage between the male and female connectors 2 and 3 during the period of engagement and unlocking.

[0036] See also Figure 1A , Figure 2A , Figure 2BThe outer sleeve 33 of the female connector 3 is slidably sleeved on the outside of the female front shell 31 and the second spring 315. The two ends of the outer sleeve 33 are open and have a front section 331 and a rear section 332. The inner side surface of the front section 331 is provided with an inclined push surface 331a and a flat support surface 331b. The push surface 331a is inclined outwardly from the inner side of the front section 331 of the outer sleeve 33 toward the rear section 332 of the outer sleeve 33 to connect with the flat support surface 331b. When the female connector 3 is not connected to the male connector 2, the push surface 331a and the flat support surface 331b of the outer sleeve 33 of the female connector 3 are in contact with the first steel ball 317 and the second steel ball 318 respectively. The inner side wall between the front and rear sections 331, 332 of the outer sleeve 33 has a limiting portion 333, and the second spring 315 is limited between the limiting portion 333 and the front end of the female rear shell 32 and abuts against each other. The outer sleeve 33 is pushed forward by the elastic force of the second spring 315 to press and limit the movement of the first and second steel balls 317, 318.

[0037] See also Figure 1A , Figure 2A , Figure 2B , Figure 2C , Figure 2D , Figure 2E As shown, when the male connector 2 is connected to the female connector 3, an external force is applied to insert the plug-in portion 211 of the male connector 2 into the second opening 311 of the female connector 3 (as shown in FIG. Figure 2A As shown), the male connector 2 is connected to the male valve core 220 and the movable valve core 325 and the core shaft head 329 of the fixed core shaft 326 in the female connector 3 (as shown in FIG. Figure 2B As shown in the figure, the plug-in portion 211 of the male connector 2 pushes the movable valve core 325 of the female connector 3 to move toward the second connection port 323 therein, and at the same time, the male valve core 220 in the male connector 2 is also resisted by the fixed core shaft 326 in the female connector 3 and moves backward toward the first connection port 218 therein, and then the push surface 215a of the protrusion 215 of the male connector 2 first contacts the first steel ball 317 that pushes the female front shell 31, and the push surface 331a of the outer sleeve 33 is first pushed and driven by the thrust transmitted by the first steel ball 317 to move toward the female rear shell 32 by a first stroke as the first unlocking stroke (as shown in the figure). Figure 2C As shown in FIG. 2 ), the push surface 215a of the protrusion 215 of the male connector 2 contacts the second steel ball 318 that pushes the female front shell 31, and the push surface 331a of the outer sleeve 33 is again pushed and driven by the thrust transmitted by the second steel ball 318 to move toward the female rear shell 32 for a second stroke as the second unlocking stroke (as shown in FIG. 2 ). Figure 2DAs shown in FIG. 2 , the first and second steel balls 317 and 318 are temporarily unlocked and move toward the groove 216 of the male connector 2. Finally, the outer sleeve 33 is pushed back to its original position by the elastic force of the second spring 315 to press the first steel ball 317 against the positioning surface 215b of the male connector 2 and lock it (as shown in FIG. 2 ). Figure 2E As shown), the male and female connectors 2 and 3 are connected and the first and second channels 219 and 324 are connected.

[0038] In the above embodiment, the female rear shell 32 is screwed together with the external thread 316 of the female front shell 31 through the internal thread 321 therein, but the present invention is not limited thereto. In other embodiments, the female front shell 31 and the female rear shell 32 can be connected and assembled into one body by embedding or other methods (such as).

[0039] Therefore, by means of the locking design of the protrusion 215 of the male connector 2 and the first and second steel balls 317 and 318 that are offset frontally and rearwardly of the female connector 3 in coordination with each other, not only can the unlocking stroke be increased, but the two-stage unlocking stroke can also improve the force transmission efficiency of the first and second steel balls 317 and 318 for unlocking the outer sleeve 33, thereby ensuring a good locking stability after the male connector 2 is locked by the outer sleeve 33 of the female connector 3, thereby effectively improving the problem of the conventional female connector's ring loosening and unlocking due to component tolerance or strong vibration. In addition, during the connection between the male and female connectors 2 and 3, the first and second steel balls 317 and 318 of the female connector 3 are directly pushed by the protrusion 215 of the male connector 2 to drive the outer sliding sleeve 33 to move to achieve self-unlocking, thereby solving the problem that the ring of the conventional female connector must be manually held and external force is applied to the ring to push it in order to connect with the male connector. Therefore, the utility model can achieve the effect of single-handed operation of connecting the male and female connectors 2 and 3, and the connection is smooth and the operation is convenient.

Claims

1. A quick connector, characterized in that: include: A male connector, comprising a male connector body, a first passage is provided through the male connector body, a male valve core and a first spring are provided in the first passage, the male valve core is located in the front end of the male connector body, the first spring abuts between the male valve core and the rear end inner wall of the male connector body, a convex body is provided on the outer side of the male connector body, the convex body has an inclined push surface and an inclined positioning surface, the push surface and the positioning surface are inclined toward the front and rear end directions of the male connector body respectively; A female connector, comprising a female front shell, a female rear shell and an outer sleeve, the female front shell having a plurality of first through holes and a plurality of second through holes, the first through holes and the second through holes respectively passing through the front section circumference of the female front shell in a front-to-back offset manner, a first steel ball and a second steel ball located behind the first steel ball are respectively arranged in the first through hole and the second through hole, and a second spring is sleeved on the outside of the female front shell, the female front shell and the female rear shell are connected to each other and jointly define a second channel connecting the first through holes and the second through holes, a movable valve core, a fixed core shaft and a third spring are arranged in the second channel, the fixed core shaft is connected to the female rear shell, the movable valve core is movably sleeved on the outside of the fixed core shaft, the third spring abuts between the movable valve core and the bottom of the fixed core shaft, and the outer sleeve is slidably sleeved on the outside of the female front shell and the second spring; After the male connector and the female connector are engaged, the first steel ball and the second steel ball of the female connector are pushed in sequence by the pushing surface of the convex body of the male connector body, so as to drive the outer sleeve to move toward the rear shell of the female connector by a first stroke and a second stroke in sequence. The first steel ball is pushed against the positioning surface by the convex body, and the outer sleeve is pushed back to its original position by the second spring to press the first steel ball and lock it, so that the male connector and the female connector are engaged and the first channel and the second channel are connected.

2. The quick connector according to claim 1, characterized in that: The male connector body is provided with an inserting portion, a male seat portion and a male connecting portion. The inserting portion and the male connecting portion are respectively located at the front and rear sections of the male connector body. The male seat portion is located at the middle section of the male connector body. A first annular groove is provided at the rear side of the male seat portion. A first sealing body is provided in the first annular groove. A groove is defined between the front side of the male seat portion and the convex body relative to the male seat portion. The first steel ball and the second steel ball are placed in the groove.

3. The quick connector according to claim 1, characterized in that: The outer sleeve has a front section and a rear section with both ends being open. The inner side surface of the front section is provided with an inclined push surface and a flat rest surface. The push surface is inclined outwardly from the inner side of the front section of the outer sleeve toward the rear section and connected to the flat rest surface. The push surface and the flat rest surface are in contact with and abut against the first steel ball and the second steel ball respectively. The inner side wall between the front section and the rear section has a limiting portion, and the second spring abuts between the limiting portion and the front end of the female rear shell.

4. The quick connector according to claim 1, characterized in that: The front and rear ends of the male connector body are respectively provided with a first opening and a first connecting port, the first opening and the first connecting port are respectively connected to the first channel, the male valve core is accommodated in the first opening, and a second annular groove is provided on the outer side of the male valve core, and a second sealing body for providing sealing is arranged in the second annular groove.

5. The quick connector according to claim 1, characterized in that: The outside of the female head front shell is provided with a plurality of external threads, and the front section inner wall surface of the female head rear shell is provided with a plurality of internal threads. The female head front shell is screwed and assembled with the internal threads in the female head rear shell through the external threads, and a third sealing body is provided between the rear end of the female head front shell and the inner bottom surface of the female head rear shell to provide sealing.

6. The quick connector according to claim 1, characterized in that: A first groove and a second groove are respectively provided on the outer sides of the fixed core shaft and the movable valve core, a third groove is provided on the inner wall of the front section of the female head front shell, the first groove, the second groove and the third groove respectively accommodate a fourth sealing body, a fifth sealing body and a sixth sealing body in sequence, the fourth sealing body is located between the fixed core shaft and the movable valve core to provide sealing, the fifth sealing body and the sixth sealing body are located between the movable valve core and the inner wall of the female head front shell to provide sealing.

7. The quick connector according to claim 1, characterized in that: The first through hole and the second through hole are formed through the circumferential side of the female head front shell along the circumferential direction and at positions not on the same circumference.

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