Fluid connector

Abstract

A fluid connector includes a housing having a fluid passage, a ball valve housed within the housing, an operating member operating the ball valve to rotate, and a pin member, the operating member operating the ball valve to be rotatable between a closed position blocking the fluid passage and an open position opening the fluid passage, a containing hole for containing the pin component and an elastic component for supporting the pin component are arranged on the front end face of the shell, when the fluid connector is not connected with the adaptive end connector in a matched mode, the pin component is supported by the elastic component to extend out of the containing hole, and when the fluid connector abuts against the adaptive end connector and rotates to a matching hole, corresponding to the adaptive end connector, of the pin component, the elastic component extends out of the containing hole. The pin component is pressed by the elastic component to stretch into the matching hole, when the pin component is located in the matching hole, the operating component can operate the ball valve to rotate so as to be opened and closed, a guiding structure is arranged at the front end of the pin component, and the pin component can compress the elastic component through guiding of the guiding structure so as to retreat from the matching hole.

Description

[Technical Field]

[0001] This invention relates to a fluid connector, and more particularly to a fluid connector with a simple structure and easy manufacturing process that prevents accidental disconnection. [Background Technology]

[0002] The prior art, as disclosed in Chinese Invention No. CN102459985B, is a fluid connector comprising a housing, a ball valve housed within the housing, a handle mounted outside the housing for controlling the rotation of the ball valve, a detection pin protruding from the front end face of the housing in its normal state, and a locking pin engaging with a mating hole of an adapter connector. The handle can drive the locking pin to protrude from the front end face of the housing, and the detection pin, through a locking member, can control whether the locking pin and the handle can be linked. However, this fluid connector has numerous components and a complex structure.

[0003] Therefore, it is indeed necessary to improve the existing electrical connectors. [Summary of the Invention]

[0004] The purpose of this invention is to provide a fluid connector with anti-misoperation function, which has a simple structure and reliable performance.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a fluid connector, comprising a housing having a fluid channel, a ball valve with a through hole housed within the housing, an operating component and a pin component mounted outside the housing to control the rotation of the ball valve, wherein the front end of the housing is connected to an adapter connector having a mating hole at its front end, the operating component controls the ball valve to rotate between a closed position blocking the fluid channel and an open position opening the fluid channel, and when the ball valve is in the open position, the through hole communicates with the fluid channel, and the front end face of the housing is provided with a receiving hole for receiving the pin component, wherein an elastic component supporting the pin component is provided within the receiving hole. When the fluid connector is not mated with the adapter connector, the pin member extends out of the receiving hole due to the elastic support of the elastic member. When the fluid connector abuts against the adapter connector and rotates to the mating hole of the adapter connector corresponding to the pin member, the pin member extends into the mating hole due to the pressure of the elastic member. When the pin member is in the mating hole, the operating member can operate the ball valve to rotate to open and close. The front end of the pin member has a guide structure. When the pin member is in the mating hole and the ball valve is closed, rotating the fluid connector allows the pin member to compress the elastic member through the guidance of the guide structure and exit the mating hole.

[0006] Furthermore, the guiding structure has a guiding surface, through which the pin member compresses the elastic member to exit the mating hole. The receiving hole includes a main hole corresponding to the mating hole and an expansion hole extending to the side from the main hole. The guiding structure includes an insertion portion disposed in the main hole and an expansion portion disposed in the expansion hole next to the insertion portion. When the fluid connector abuts against the adapter connector and rotates to the mating hole of the adapter connector corresponding to the pin member, the insertion portion extends into the mating hole while the expansion portion is located outside the mating hole. The guiding surface is formed together in the insertion portion and the expansion portion.

[0007] Furthermore, the pin member has a columnar body and a guide structure integrally extended from the front end of the body, the guide structure being roughly shark fin shaped.

[0008] Furthermore, the guide structure is a plate with a thickness smaller than that of the main body.

[0009] Furthermore, when the fluid connector is not mated with the adapter connector, the pin member is in a first position extending out of the receiving hole due to the elastic support of the elastic member. When the fluid connector abuts against the adapter connector, the pin member compresses the elastic member and is in a second position retracted into the receiving hole. When the fluid connector abuts against the adapter connector and rotates to the mating hole corresponding to the adapter connector, the pin member is in a third position inserted into the mating hole due to the pressure of the elastic member. The fluid connector includes a limiting member located between the operating member and the pin member. When the pin member is in the first and second positions, the limiting member prevents the operating member from controlling the rotation of the ball valve. When the pin member is in the third position, the operating member is not limited by the limiting member and can control the rotation of the ball valve to open and close the ball valve.

[0010] Furthermore, when the pin member is in the first position, the height by which the pin member protrudes from the receiving hole is a first height. When the pin member is in the third position, the height by which the pin member protrudes from the receiving hole is a second height that is less than the first height. When the pin member is in the third position and the ball valve is rotated to the open position by the operating member, the pin member is prevented from retracting into the receiving hole by the restricting member.

[0011] Furthermore, the pin member has a first groove recessed on its periphery, the operating member has a second groove, and the accommodating hole has an opening formed by penetrating the wall of the housing. The limiting member can switch positions between the first groove and the second groove through the opening. When the pin member is in the first position and the second position, the first groove and the second groove are offset in the front-rear direction. The limiting member is pushed against the opening and the second groove by the part of the pin member other than the first groove. At this time, the limiting member restricts the rotation of the operating member. When the pin member is in the third position, the first groove, the opening and the second groove are aligned. At this time, the operating member can be rotated. The rotation of the operating member causes the limiting member to disengage from the second groove and be located in the opening and the first groove.

[0012] Furthermore, the limiting member is a ball bearing, and the pin member has an upper section that extends out of the front end face of the housing, and a lower section connected to the upper section and located below the upper section. The diameter of the lower section is smaller than the diameter of the upper section, and the diameter of the upper section is approximately the same as the inner diameter of the receiving hole. The elastic member is supported below the lower section, and the lower section has a recessed first groove on its circumference. When the pin member is in the first position, the limiting member is located below the first groove and is pushed into the second groove by the lower section. When the pin member is in the second position, the limiting member is located above the first groove and is pushed into the second groove by the lower section.

[0013] Furthermore, when the operating member drives the ball valve to rotate from the open position to the closed position, the first groove, the opening, and the second groove are aligned. At this time, the limiting member is located in the first groove, the opening, and the second groove. Then, when the fluid connector is rotated, the pin member can be disengaged from the mating hole by the guidance of the guiding structure. At this time, the limiting member is disengaged from the first groove and is pushed against the opening and the second groove by the part of the pin member other than the first groove, so that the pin member returns to the first position.

[0014] Furthermore, the operating component is a handle connected to the ball valve via a columnar body to drive the ball valve to rotate. The operating component includes a base with one end being an arc surface and a handle integrally extended from the other end of the base for pressing operation. One end of the columnar body is fixed to the base and the other end is fixed to the ball valve. The arc surface of the base faces the opening and is provided with the second slot. The housing is provided with a wall surface opposite to the arc surface of the base. The wall surface is recessed to form a concave arc portion that mates with the arc surface. The opening is provided in the concave arc portion.

[0015] Furthermore, the fluid connector has the same structure as the adapter connector, and the fluid connector has a mating hole for the pin member provided by the adapter connector to engage.

[0016] Compared with the prior art, the present invention has the following advantages: The fluid connector of the present invention is provided with only one pin member. When the fluid connector is not mated with the adapter connector, the pin member is normally supported by the elastic member and protrudes out of the receiving hole. At this time, it is impossible to operate the operating member to open the ball valve. When the fluid connector abuts against the adapter connector and rotates to the point where the pin member corresponds to the mating hole of the adapter connector, the pin member is pressed into the mating hole by the elastic member. At this time, it is possible to operate the operating member to control the opening and closing of the ball valve. When the pin member is in the mating hole and the ball valve is closed, rotating the fluid connector causes the pin member to compress the elastic member through the guide structure provided at its front end, thereby exiting the mating hole of the adapter connector. The fluid connector has a simple structure and is easy to operate. Furthermore, by providing the guide structure, the pin member of the fluid connector can not only mate with adapter connectors with the same structure, but also with adapter connectors with different structures. [Attached Image Description]

[0017] Figure 1 This is a perspective view of the fluid connector and the adapter connector of the present invention not being mated.

[0018] Figure 2 This is a perspective view of the fluid connector and the adapter connector of the present invention mating.

[0019] Figure 3 This is a perspective view of the operating components of the fluid connector of the present invention in an unopened state.

[0020] Figure 4 This is a schematic diagram of the pin component of the fluid connector of the present invention being compressed.

[0021] Figure 5 This is a perspective view of the operating components of the fluid connector of the present invention in the open state.

[0022] Figure 6 This is an exploded perspective view of the fluid connector of the present invention.

[0023] Figure 7 yes Figure 6 A three-dimensional exploded view from another perspective.

[0024] Figure 8 This is a perspective view of the pin component of the fluid connector of the present invention.

[0025] Figure 9 yes Figure 3 A sectional view along line AA.

[0026] Figure 10 yes Figure 3 Sectional view along line BB.

[0027] Figure 11 yes Figure 4 A sectional view along line CC.

[0028] Figure 12 Is Figure 11 The diagram shows a cross-sectional view of the fluid connector after rotating it so that its pin component enters the mating hole of the adapter connector.

[0029] Figure 13 yes Figure 5 Sectional view along line DD.

[0030] Figure 14 yes Figure 5 A cross-sectional view along line EE.

[0031] Figure 15 This is a cross-sectional schematic diagram of the mating of the fluid connector and the adapter connector of the present invention.

[0032] Figure 16 This is a cross-sectional schematic diagram of the fluid connector and the adapter connector of the present invention from another perspective.

Detailed Implementation Methods

[0033] To facilitate a better understanding of the purpose, structure, features, and effects of this invention, the invention will now be further described in conjunction with the accompanying drawings and specific embodiments.

[0034] Please see Figures 1 to 16As shown, this invention discloses a fluid connector 100, which is used to mate with an adapter connector 500 to connect a fluid channel between the two connectors. The fluid connector 100 includes a housing 1 having a fluid channel 10, a ball valve 2 with a through hole 20 housed within the housing 1, an operating member 3 mounted outside the housing 1 and connected to the ball valve 2 to control the rotation of the ball valve, and a pin member 4 protruding from the front end face 11 of the housing 1 to mate with a mating hole 501 provided at the front end of the adapter connector 500. The fluid connector 100 and the adapter connector 500 have the same structure; the fluid connector 100, in addition to the pin member 4, also has a mating hole 101 provided at the front end of the housing 1, while the adapter connector 500, in addition to the mating hole 501, also has a pin member 502. The mating hole can be a through hole or a blind hole. When the fluid connector 100 is mated with the adapter connector 500 and rotated into place, the pin member 4 of the fluid connector 100 enters the mating hole 501 of the adapter connector 500, while the pin member 502 of the adapter connector 500 enters the mating hole 101 of the fluid connector 100, thereby realizing the double interlocking function between the two and effectively eliminating leakage.

[0035] The operating component 3 controls the ball valve 2 to rotate between a closed position that blocks the fluid passage 10 and an open position that opens the fluid passage 10. Figure 3 , Figure 9 and Figure 10 As shown, when the operating component 3 is not rotated, the through hole 20 of the ball valve 2 is not connected to the fluid channel 10. At this time, the ball valve 2 is in the closed position, blocking the fluid channel 10. Figure 5 , Figure 13 and Figure 14 As shown, when the operating component 3 rotates, the through hole 20 of the ball valve 2 communicates with the fluid channel 10. At this time, the ball valve 2 is in the open position with the fluid channel 10 open. In this invention, the operating component 3 is connected and fixed to the ball valve 2 by a columnar body 5 so as to drive the ball valve 2 to rotate. The ball valve 2 is provided with a pivoting component 6 assembled in the housing 1 on the other side corresponding to the columnar body 5. The pivoting component 6 includes a pivoting part 61 with one end fixed to the ball valve 2 and the other end pivotally assembled in the housing 1, and a spring 62 disposed in the pivoting part 61 and supported in the housing 1. The spring 62 allows the ball valve 2 to pivot stably.

[0036] The front end face 11 of the housing 1 is provided with a receiving hole 110 for receiving the pin member 4, and an elastic member 7 for supporting the pin member 4 is provided in the receiving hole 110. When the fluid connector 100 is not mated with the adapter connector 500, refer to Figure 3As shown, the pin member 4 is supported by the elastic member 7 and is in a first position extending out of the receiving hole 110. (See reference...) Figure 4 As shown, when the fluid connector 100 abuts against the adapter connector 500, the pin member 4 is pressed by the adapter connector 500, thereby compressing the elastic member 7 and placing it in the second position retracted from the receiving hole 110. (See reference...) Figure 5 As shown, when the fluid connector 100 abuts against the adapter connector 500 and rotates to the mating hole 501 of the adapter connector 500 corresponding to the pin member 4, the pin member 4 is pressed by the elastic member 7 and is in a third position extending into the mating hole 501. To achieve the above function, the fluid connector 100 includes a limiting member 8 located between the operating member 3 and the pin member 4. When the pin member 4 is in the first and second positions, the limiting member 8 prevents the operating member 3 from controlling the rotation of the ball valve 2. When the pin member 4 is in the third position, the operating member 3 is not restricted by the limiting member 4 and can control the rotation of the ball valve 2. In addition, when the pin member 4 is in the third position and the ball valve 2 is rotated to the open position by the rotation of the operating member 3, the pin member 4 is prevented by the limiting member 8 from retracting into the receiving hole 110, thereby preventing the fluid connector 100 from rotating in the open state of the ball valve 2, effectively avoiding fluid loss due to improper operation.

[0037] In this invention, the pin member 4 has a first groove 401 recessed on its periphery, the operating member 3 has a second groove 301, and the accommodating hole 110 penetrates the wall 102 of the housing 1 to form an outwardly exposed opening 1021. The limiting member 8 can switch positions between the first groove 401 and the second groove 301 via the opening 1021. Specifically, the operating member 3 is a handle, comprising a base 31 with one end being an arc surface 30 and a handle 32 integrally extended from the other end of the base 31 for pressing operation. One end of the columnar body 5 is fixed to the base 31 and the other end is fixed to the ball valve 2. The arc surface 30 faces the wall 102, the second groove 301 is disposed on the arc surface 30, and the wall 102 is provided with a concave arc portion 1020 that mates with the arc surface 30. The opening 1021 is disposed within the concave arc portion 1020. When the operating member 3 is in position... Figure 9 When the indicated position is reached, pin component 4 is in the first position, at which point ball valve 2 is in... Figure 10 In the unopened state shown, the second groove 301 communicates with and is aligned with the opening 1021. When the pin member 4 is located... Figure 11In the second position shown, the second groove 301 is connected to and aligned with the opening 1021, at which point the operating member 3 cannot operate the ball valve 2 to open. (See reference...) Figure 10 and Figure 11 As shown, when the pin member 4 is in the first position and the second position, the first groove 401 and the second groove 301 are offset in the front-rear direction. The limiting member 8 is pushed against the opening 1021 and the second groove 301 by the portion of the pin member 4 other than the first groove 401. At this time, the limiting member 8 restricts the rotation of the operating member 3, so the ball valve 2 cannot be opened. Figure 5 , Figure 13 and Figures 14 to 16 As shown, when the pin component 4 is in the third position, the first groove 401, the opening 1021 and the second groove 301 are connected and aligned with each other, and the operating component 3 can be rotated. The rotation of the operating component 3 not only drives the ball valve 2 to open, but also drives the limiting component 8 to disengage from the second groove 301 and be located at the opening 1021 and the first groove 401.

[0038] In this invention, the limiting member 8 is a ball bearing, and the pin member 4 has an upper section 41 located at the upper end and a lower section 42 connected to the upper section 41 and located below the upper section 41. The elastic member 7 is supported below the lower section 42 so that the upper section 41 protrudes from the receiving hole 110. The diameter of the lower section 42 is smaller than the diameter of the upper section 41, and the diameter of the upper section 42 is approximately the same as the inner diameter of the receiving hole 110. The lower section 42 is recessed on its periphery to form the first groove 401. Setting the diameter of the upper section 41 to be approximately the same as the receiving hole 110 allows the pin member 4 to move smoothly within the receiving hole 110. Setting the diameter of the lower section 42 to be smaller than the inner diameter of the receiving hole 110 allows the limiting member 8 to have a certain space between the portion of the lower section 42 other than the first groove 401 and the receiving hole 110 after it is disengaged from the first groove 401, which can accommodate the limiting member 8. When the pin member 4 is in the first position, the limiting member 8 is located below the first groove 401 and is pushed into the second groove 301 by the lower section 42. The pin member 4 protrudes from the receiving hole 110 at a height of a first height H1. When the pin member 4 is in the second position, the limiting member 8 is located above the first groove 401 and is pushed into the second groove 301 by the lower section 42. The pin member 4 protrudes from the receiving hole 110 at a height of a second height H2, which is less than the first height H1. Furthermore, to reliably support the elastic member 7, the pin member 4 has a base 43 at the lower end of the lower section 42 with a diameter equivalent to the inner diameter of the receiving hole 110. The elastic member 7 is supported on the lower surface of the base 43.

[0039] The pin member 4 has a guide structure 44 at its front end. When the pin member 4 is in the mating hole 501 and the ball valve 2 is closed, rotating the fluid connector 100 allows the pin member 4 to be guided by the guide structure 44 and compress the elastic member 7, causing the pin member 4 to retract from the mating hole 501. The guide structure 44 has a guide surface 440 that abuts against the inlet edge of the mating hole 501. As the fluid connector 100 is rotated, the pin member 4 compresses the elastic member 7 through the guide surface 440 and retracts from the mating hole 501.

[0040] Specifically, the receiving hole 110 includes a main hole 1101 corresponding to the mating hole 501 and an expansion hole 1102 extending laterally from the main hole 1101. The guiding structure 44 includes an insertion portion 441 corresponding to the main hole 1101 and an expansion portion 442 disposed in the expansion hole 1102. The guiding surface 440 is formed together in the insertion portion 441 and the expansion portion 442. When the fluid connector 100 abuts against the adapter connector 500, the pin member 4 is pressed by the adapter connector 500, thereby the pin member 4 compresses the elastic member 7, causing the insertion portion 441 to retract into the main hole 1101 and the expansion portion 442 to retract into the expansion hole 1102. When the fluid connector 100 abuts against the adapter connector 500 and rotates to the mating hole 501 of the adapter connector 500 corresponding to the pin member 4, the pin member 4, supported by the elastic member 7, causes the insertion part 441 to extend into the mating hole 501 while the extension part 442 is located outside the mating hole 501. At this time, the guide surface 440 abuts against the inlet edge of the mating hole 501. When the ball valve 2 is closed and the fluid connector 100 is rotated, the pin member 4, guided by the guide surface 440 of the guide structure 44, compresses the elastic member 7, causing the insertion part 441 to retract into the main hole 1101 and the extension part 442 to retract into the extension hole 1102. In this invention, the pin member 4 has a columnar body 40 and a guide structure 44 integrally extended from the front end of the body 40, the guide structure 44 being generally shark fin shaped. The guide structure 44 is a plate with a thickness smaller than that of the main body 40 and a width larger than that of the main body 40. The thinner guide structure 44 allows the pin member 4 to be more easily guided through the guide surface 440 and rotated out of the mating hole 501. Of course, the thickness of the guide structure 44 can also be the same as or greater than that of the main body 40.

[0041] When the ball valve 2 is in the open position, pressing the handle 32 causes the operating member 3 to rotate the ball valve 2 from the open position to the closed position. The first groove 401, the opening 1021, and the second groove 301 return to their corresponding interconnected state. At this time, the limiting member 8 is located in the first groove 401, the opening 1021, and the second groove 301. Then, rotating the fluid connector 100 in the opposite direction allows the pin member 4 to compress the elastic member 7 via the guide surface 440 of its guide structure 44, thereby disengaging from the mating hole 501. Simultaneously, the limiting member 8 disengages from the first groove 401 and is pushed back to the opening 1021 and the second groove 301 by the lower section 42 of the pin member 4 (excluding the first groove 401), causing the pin member 4 to return to the first position. The adapter connector 500 also performs the above operation simultaneously, allowing its pin member 502 to disengage via the mating hole 101 of the fluid connector 100.

[0042] In this invention, the front end face 11 of the fluid connector 100 is provided with a protruding claw 111 and a recessed groove 112, and the adapter connector 500 is similarly provided with a claw 503 and a groove 504. When the fluid connector 100 and the adapter connector 500 are mated, the claw 111 of the fluid connector 100 is inserted into the groove 504 of the adapter connector 500, and the claw 503 of the adapter connector 500 is inserted into the groove 112 of the fluid connector 100. As the fluid connector 100 rotates relative to the adapter connector 500, the claw and the groove rotate and lock together, preventing the two connectors from disengaging in the front-to-back direction. The engagement between the pin member of the fluid connector 100 and the mating hole of the adapter connector 500 is used to prevent the two connectors from rotating when the ball valve is not closed, effectively preventing liquid leakage.

[0043] It is worth noting that the fluid connector 100 of the present invention is not limited to mating with the adapter connector 500 with the same structure, but can also mat with adapter connectors with different structures. For example, the pin member of the adapter connector may not have a guiding structure and can still be mated with the fluid connector 100 of the present invention. It should be noted that the above are merely preferred embodiments of the present invention and should not be construed as limiting the scope of the invention. That is, all simple equivalent changes and modifications made in accordance with the claims and description of the present invention should still fall within the scope of the patent coverage of the present invention.

Claims

1. A fluid connector comprising a housing having a fluid passage, a ball valve provided with a through hole and housed in the housing, an operating member mounted outside the housing to operate rotation of the ball valve, and a pin member, the front end of the housing being fittedly connected with an adapter connector having a fitting hole at the front end, the operating member operating the ball valve to enable rotation between a closed position to block the fluid passage and an open position to open the fluid passage, the through hole being in communication with the fluid passage when the ball valve is in the open position, a front end face of the housing being provided with a receiving hole to receive the pin member, characterized in that: The accommodating hole is provided with an elastic member supporting the pin member, when the fluid connector is not connected with the mating connector, the pin member is elastically supported by the elastic member to protrude out of the accommodating hole, when the fluid connector abuts against the mating connector and rotates to the matching hole of the mating connector corresponding to the pin member, the pin member is pressed by the elastic member to protrude into the matching hole, when the pin member is in the matching hole, the operating member can operate the ball valve to rotate to open and close, the front end of the pin member has a guide structure, when the pin member is in the matching hole and the ball valve is closed, rotating the fluid connector, the pin member can guide the elastic member to compress to exit the matching hole through the guide of the guide structure.

2. The fluid connector of claim 1, wherein: The guide structure has a guide surface, the pin member compresses the elastic member to exit the matching hole through the guide of the guide surface, the accommodating hole includes a main hole corresponding to the matching hole and an expansion hole expanding from the main hole, the guide structure includes an insertion part provided in the main hole and an expansion part provided in the expansion hole and located beside the insertion part, when the fluid connector abuts against the mating connector and rotates to the matching hole of the mating connector corresponding to the pin member, the insertion part protrudes into the matching hole and the expansion part is located outside the matching hole, the guide surface is formed on the insertion part and the expansion part.

3. The fluid connector of claim 2, wherein: The pin member has a columnar main body and the guide structure integrally extended from the front end of the main body, the guide structure is substantially in the shape of a shark fin, the guide structure is a plate body with a thickness smaller than the size of the main body.

4. The fluid connector of claim 1, wherein: When the fluid connector is not connected with the mating connector, the pin member is elastically supported by the elastic member to be in a first position protruding out of the accommodating hole, when the fluid connector abuts against the mating connector, the pin member compresses the elastic member to be in a second position retracted into the accommodating hole, when the fluid connector abuts against the mating connector and rotates to the matching hole of the mating connector corresponding to the pin member, the pin member is pressed by the elastic member to be in a third position protruding into the matching hole, the fluid connector includes a limiting member between the operating member and the pin member, when the pin member is in the first position and the second position, the limiting member prevents the operating member from operating the rotation of the ball valve, when the pin member is in the third position, the operating member can operate the rotation of the ball valve to open and close without being limited by the limiting member.

5. The fluid connector of claim 4, wherein: When the pin member is in the first position, the height of the pin member protruding out of the accommodating hole is a first height, when the pin member is in the third position, the height of the pin member protruding out of the accommodating hole is a second height smaller than the first height, when the pin member is in the third position and the ball valve is operated to the open position by the operating member, the pin member cannot be retracted into the accommodating hole due to the prevention of the limiting member.

6. The fluid connector of claim 1, wherein: The pin member is provided with a first groove on the circumferential side, the operation member is provided with a second groove, the circumferential side of the accommodating hole is provided with an opening through the wall of the shell, the limiting member can switch positions between the first groove and the second groove through the opening, when the pin member is in the first position and the second position, the first groove and the second groove are staggered in the front and back direction, the limiting member is pushed by the part of the pin member other than the first groove to the opening and the second groove, at this time, the limiting member limits the rotation of the operation member, when the pin member is in the third position, the first groove, the opening and the second groove are aligned, at this time, the operation member can be operated to rotate, the rotation of the operation member drives the limiting member to be out of the second groove and be located in the opening and the first groove.

7. The fluid connector of claim 6, wherein: The limiting member is a ball, the pin member has an upper segment part at the upper end which can extend out of the front end surface of the shell, a lower segment part connected with the upper segment part below the upper segment part, the diameter of the lower segment part is smaller than the diameter of the upper segment part, the diameter of the upper segment part is substantially the same as the inner diameter of the accommodating hole, the elastic member is supported below the lower segment part, the circumferential side of the lower segment part is recessed to form the first groove, when the pin member is in the first position, the limiting member is located below the first groove and is pushed into the second groove by the lower segment part, when the pin member is in the second position, the limiting member is located above the first groove and is pushed into the second groove by the lower segment part.

8. The fluid connector of claim 6, wherein: When the operation member drives the ball valve to rotate from the open position to the closed position, the first groove, the opening and the second groove are aligned, at this time, the limiting member is located in the first groove, the opening and the second groove, and then the fluid connector is rotated, the pin member can be guided out of the fitting hole through the guide structure, at this time, the limiting member is out of the first groove and is pushed by the part of the pin member other than the first groove to the opening and the second groove to make the pin member return to the first position.

9. The fluid connector of claim 8, wherein: The operation member is a handle connected to the ball valve through a columnar body to drive the ball valve to rotate, the operation member includes a base body with a circular arc surface at one end and a handle for pressing operation integrally extended from the other end of the base body, one end of the columnar body is fixed to the base body and the other end is fixed to the ball valve, the circular arc surface of the base body faces the opening and is provided with the second groove, the shell is provided with a wall surface opposite to the circular arc surface of the base body, the wall surface is recessed to form a concave arc part matched with the circular arc surface, and the opening is arranged in the concave arc part.

10. The fluid connector of claim 1, wherein: The fluid connector is the same as the adapter end connector, the fluid connector is provided with a fitting hole matched with the pin member of the adapter end connector.

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