Fluid connector

Abstract

The fluid connector is characterized in that a first pin is contained in a pin hole and moves back and forth between a locking position and an unlocking position, and the first pin comprises a front end face and a containing groove penetrating through the front end face; the second pin is contained in the containing groove and the pin hole and can move front and back, and before the fluid connector is in butt joint with the complementary connector, the front end of the first pin forwards stretches out of the pin hole, and the first pin is kept at the locking position. The second pin is positioned in the pin hole and the front end of the second pin is accommodated in the accommodating groove; when the fluid connector is butted with the complementary connector, the complementary connector pushes the first pin, so that the first pin moves backwards in the pin hole until the first pin is kept at the unlocking position; when the first pin is located at the unlocking position, the front end of the second pin moves forwards to extend out of the containing groove and the pin hole and is contained in the complementary connector, the first pin and the second pin share the same pin hole, and the second pin at least partially occupies the inner space of the first pin, so that the space of the shell is saved.

Description

[Technical field]

[0001] The invention relates to a fluid connector, in particular to a fluid connector suitable for fluid transmission. [Background technology]

[0002] The fluid connector connects or blocks the fluid flow in the fluid channel by engaging or disengaging with a complementary connector. An existing fluid connector CN202321977845.7 includes an unlocking guide rod 8 located in a first blind hole 6, and a locking guide rod 9 located in a second blind hole 7; the unlocking guide rod 8 has a locking position and an unlocking position. When in the locking position, the front end of the unlocking guide rod 8 extends out of the first blind hole 6 and can keep the valve stem 4 in the closed position, refusing the valve stem 4 to rotate from the closed position to the open position; when in the unlocking position, the front end of the unlocking guide rod 8 retracts into the first blind hole 6 and allows the valve stem 4 to rotate from the closed position to the open position; the locking guide rod 9 has a first position in which the front end extends out of the second blind hole 7 and a second position in which the front end retracts into the second blind hole 7, and the locking guide rod 9 can move freely between the first position and the second position.

[0003] The above structure has the following problems:

[0004] Since the unlocking guide rod is located in the first blind hole and the locking guide rod is located in the second blind hole, two blind holes need to be opened on the housing of the fluid connector, and the two blind holes are spaced apart from each other. The two blind holes occupy a large space, which is not conducive to space utilization on the housing.

[0005] Therefore, it is necessary to design a new fluid connector to overcome the above problems. [Summary of the invention]

[0006] In view of the problems faced by the background technology, the purpose of the invention is to provide a fluid connector in which a first pin is accommodated in a pin hole, a second pin is accommodated in the first pin and the pin hole and can move forward and backward, so that the first pin and the second pin share the same pin hole and the second pin at least partially occupies the internal space of the first pin, thereby saving shell space.

[0007] To achieve the above purpose, the present invention adopts the following technical means:

[0008] A fluid connector, characterized in that it comprises: a housing, comprising a docking surface, a pin hole and a fluid passage extending axially through the docking surface, respectively, the docking surface being located at the front end of the housing and docking with a complementary connector; a valve core capable of rotating between a closed position blocking the fluid passage and an open position opening the fluid passage; a first pin received in the pin hole and moving forward and backward between a locked position and an unlocked position, the first pin comprising a front end surface and a receiving groove extending through the front end surface; a second pin received in the receiving groove and the pin hole and moving forward and backward, and before the fluid connector docks with the complementary connector, the front end of the first pin extends forward out of the pin hole, and the first pin remains in the housing. Locked position, at this time, the valve core is in the closed position and the first pin prevents the valve core from rotating from the closed position to the open position; when the valve core is in the closed position, the second pin is located in the pin hole and the front end of the second pin is received in the receiving groove; when the fluid connector is docked with the complementary connector, the complementary connector pushes the first pin, so that the first pin moves backward in the pin hole until the first pin is maintained in the unlocked position; when the first pin is in the unlocked position, the first pin is used to allow the valve core to rotate from the closed position to the open position; and during the process of the valve core rotating from the closed position to the open position, the front end of the second pin moves forward to extend out of the receiving groove and the pin hole and is received in the complementary connector.

[0009] Furthermore, it also includes a driving member, which is fixed to the valve core, and the valve core is driven to rotate by the rotation of the driving member. The driving member is provided with a toothed disk, and the first pin includes a surrounding wall and a clearance groove penetrating the surrounding wall, and the receiving groove is formed by the surrounding wall, and the clearance groove is connected to the receiving groove. The rear end of the second pin is provided with a latching tooth along the axial direction, and the toothed disk passes through the clearance groove and enters the receiving groove to engage with the latching tooth, and the second pin is driven to move forward and backward by the rotation of the driving member.

[0010] Furthermore, the surrounding wall includes a blocking surface connected forwardly to the clearance groove, and when the first pin is located at the locking position, the toothed disc abuts against the blocking surface backwardly to prevent the first pin from moving forward.

[0011] Furthermore, the first pin includes a rear end face, the receiving groove extends rearwardly through the rear end face, the pin hole includes a step surface opposite to the rear end face, an elastic member is received in the pin hole, one end of the elastic member abuts against the step surface of the pin hole, and the other end abuts against the rear end face, and when the valve core is in a closed position, the rear end of the second pin extends rearwardly beyond the step surface.

[0012] Furthermore, it also includes a driving member, which is fixed to the valve core, and the valve core is driven to rotate by the rotation of the driving member. The driving member is provided with a toothed disk, and the second pin is provided with a latching tooth along the axial direction. The toothed disk and the latching tooth are meshed with each other. The driving member is rotated to drive the latching tooth meshed with the toothed disk to move forward and backward. When the first pin is in the locked position, the rear end face of the first pin and the step surface of the pin hole are both located in front of the meshing point between the toothed disk and the latching tooth.

[0013] Furthermore, it also includes a driving member, which is fixed to the valve core and drives the valve core to rotate by rotating the driving member. The driving member includes a protrusion protruding outward, the first pin includes a surrounding wall and a clearance groove penetrating the surrounding wall, the receiving groove is formed by the surrounding wall, the clearance groove is connected to the receiving groove, and the surrounding wall includes a stopper connected forwardly to the clearance groove. When the first pin is located in the locked position, the stopper stops the protrusion to prevent the driving member from rotating. When the first pin is located in the unlocked position, the stopper retreats, and the clearance groove provides a clearance space for the protrusion to allow the driving member to rotate.

[0014] Furthermore, it also includes a driving member, which is fixed to the valve core, and the valve core is driven to rotate by the rotation of the driving member. The driving member includes an inwardly recessed notch, and the first pin includes a surrounding wall and a stopper protruding outward from the surrounding wall. The receiving groove is formed by the surrounding wall. When the first pin is located in the locked position, the stopper is engaged in the notch to prevent the driving member from rotating; when the first pin is located in the unlocked position, the stopper retreats and moves away from the notch to allow the driving member to rotate.

[0015] Furthermore, the pin hole includes a stop surface located in front of the stop portion. When the first pin is located in the locked position, the stop surface abuts rearwardly against the stop portion to prevent the first pin from moving forward.

[0016] Furthermore, the shell also includes an outer circumferential surface and a receiving groove recessed from the outer circumferential surface, a limit member is received in the receiving groove, an elastic ring is sleeved on the outer circumferential surface, the elastic ring covers the receiving groove, and when the first pin is in the locked position, the shell abuts rearwardly against the limit member, and the limit member abuts rearwardly against the first pin to prevent the first pin from moving forward.

[0017] Furthermore, the first pin includes a surrounding wall and a limiting groove passing through the surrounding wall. The receiving groove is formed by the surrounding wall. The limiting groove is connected to the receiving groove. A limiting member is received in the limiting groove. When the first pin is in the locked position, the shell abuts rearwardly against the limiting member, and the limiting member abuts rearwardly against the rear wall of the limiting groove to prevent the first pin from moving forward.

[0018] Furthermore, the shell also includes a accommodating groove, which is connected to the limiting groove. The length of the accommodating groove along the front-to-back direction is smaller than the length of the limiting groove. The limiting member is positioned in the accommodating groove and is located between the front wall of the limiting groove and the rear wall of the limiting groove. When the first pin moves from the unlocking position to the locking position, the front wall of the limiting groove moves away from the limiting member, and the rear wall of the limiting groove approaches the limiting member until it abuts against the limiting member forward.

[0019] Furthermore, the shell also includes a receiving groove, which is connected to the limiting groove, and the limiting member is accommodated in the receiving groove. The limiting member includes a middle part and end parts connecting the two ends of the middle part. The middle part is recessed relative to the periphery of the end parts. When observed along the front-to-back direction, the part of the second pin is located between the two end parts. There is a gap between the middle part and the second pin. When the first pin is in the locked position, the end part abuts against the rear wall of the limiting groove backwards.

[0020] Furthermore, the shell also includes a receiving groove, which is connected to the limiting groove. The length of the receiving groove along the front-to-back direction is greater than the length of the limiting groove. The limiting member is accommodated in the receiving groove and positioned in the limiting groove. The first pin moves forward and backward to drive the limiting member to move forward and backward in the receiving groove. When the first pin is in the locked position, the front wall of the receiving groove abuts rearward against the limiting member to prevent the first pin from moving forward.

[0021] Furthermore, the second pin is provided with a groove, and the forward and backward movement of the first pin drives the limiting member to move forward and backward. When the first pin is in the locked position, the groove is at least partially aligned with the limiting slot, and the groove accommodates the limiting member, so that the limiting member prevents the second pin from moving forward. When the first pin is in the unlocked position, the groove is misaligned with the limiting slot, and the limiting member is located behind the groove to allow the second pin to move forward.

[0022] Furthermore, the shell also includes a receiving groove, which is connected to the limiting groove, and the limiting member is accommodated in the receiving groove. The first pin moves forward and backward to drive the limiting member to move forward and backward in the receiving groove. The receiving groove includes a first surface and a second surface extending forward from the first surface and close to the first pin. The second surface is an inclined surface. When the first pin moves from the unlocking position to the locking position, the limiting member moves from the corresponding position of the first surface to the second surface, and the second surface is used to guide the limiting member into the groove.

[0023] Furthermore, a protrusion is protruding outward from the surrounding wall of the first pin, and a groove is provided on the second pin. The limiting member includes a main body, a clamping portion and a matching portion respectively connected to the main body, the clamping portion and the matching portion respectively extend from the main body toward the first pin, and when the first pin is in the locked position, the clamping portion passes through the limiting groove and abuts against the rear wall of the groove backward to prevent the second pin from moving forward; when the first pin moves from the locked position to the unlocked position, the protrusion abuts against the matching portion and the protrusion moves backward, and the protrusion pushes one end of the main body connected to the matching portion to move in a direction away from the second pin, driving the clamping portion to move in a direction away from the second pin; when the first pin is in the unlocked position, the rear walls of the clamping portion and the second pin are staggered with each other, so that the clamping portion allows the second pin to move forward.

[0024] Furthermore, the shell also includes a receiving groove, in which the limit member is received, the receiving groove includes an axis groove, the limit member includes a rotating shaft connected to one end of the main body away from the matching part, the rotating shaft is received in the axis groove and rotates in the axis groove, the clamping part is close to the matching part relative to the rotating shaft, one of the main body and the matching part is connected to a fixed part, one end of a spring-pressing member is connected to the fixed part, and the other end is connected to the shell, the spring-pressing member abuts the fixed part toward the second pin, and when the first pin moves from the unlocking position to the locking position, the end of the spring-pressing member connected to the fixed part drives the fixed part to move toward the direction close to the second pin.

[0025] Furthermore, the spring-pressing member is formed by stamping and bending a metal plate, the fixing portion is located between one end of the spring-pressing member connected to the fixing portion and one end of the spring-pressing member connected to the shell, and one end of the spring-pressing member connected to the fixing portion abuts against the fixing portion in a direction close to one end of the spring-pressing member connected to the shell.

[0026] Further, the first pin includes a surrounding wall, the receiving groove is surrounded by the surrounding wall, the surrounding wall includes a first wall portion and a second wall portion connected forwardly to the first wall portion, the second wall portion protrudes relative to the periphery of the first wall portion to form a blocking surface, the blocking surface is connected to the first wall portion, the pin hole includes a boss located in front of the blocking surface, when the first pin is in the locked position, the first wall portion extends forwardly out of the pin hole, and the boss abuts backwardly against the blocking surface to prevent the first pin from moving forward.

[0027] Furthermore, the pin hole includes an opening that penetrates backwards, the first pin is assembled into the pin hole from one end of the opening, a rear cover is located at the opening, and an elastic member is accommodated in the pin hole, one end of which abuts against the rear cover and the other end abuts against the first pin.

[0028] Furthermore, the first pin includes a rear end face, the receiving groove extends rearward through the rear end face, the size of the second pin along the front-to-back direction is smaller than that of the first pin, and before the fluid connector is docked with the complementary connector, the rear end of the second pin is located in the receiving groove.

[0029] Compared with the prior art, the present invention has the following beneficial effects:

[0030] The present application sets a first pin to be received in a pin hole and to move between a locked position and an unlocked position, wherein the first pin includes a front end face and a receiving groove penetrating the front end face; the second pin is received in the receiving groove and the pin hole and can move forward and backward, so that the first pin and the second pin share the same pin hole and the second pin at least partially occupies the internal space of the first pin, thereby saving shell space.

Brief Description of the Drawings

[0031] Figure 1 An exploded view of a fluid connector according to a first embodiment of the present invention;

[0032] Figure 2 A three-dimensional diagram of the fluid connector of the first embodiment of the present invention after docking with a complementary connector;

[0033] Figure 3 A perspective view of the fluid connector and the complementary connector before docking according to the first embodiment of the present invention;

[0034] Figure 4 is a cross-sectional view of a fluid connector according to a first embodiment of the present invention;

[0035] Figure 5 A cross-sectional view of the fluid connector of the first embodiment of the present invention after docking with the complementary connector and before the pull portion rotates;

[0036] Figure 6 A cross-sectional view of the fluid connector of the first embodiment of the present invention after the pull portion rotates after the fluid connector is docked with the complementary connector;

[0037] Figure 7 for Figure 1 A top view of the assembled fluid connector;

[0038] Figure 8 for Figure 7 Section view along AA;

[0039] Fig. 9 for Figure 7 Sectional view along BB;

[0040] Fig.10 A cross-sectional view of the fluid connector of the first embodiment of the present invention from another perspective;

[0041] Fig.11 for Fig.10 A cross-sectional view of a fluid connector after docking with a complementary connector;

[0042] Fig.12 It is a cross-sectional view of the cooperation between the notch and the stopper portion improved on the basis of the first embodiment of the present invention;

[0043] Fig.13 for Figure 7 Sectional view along CC;

[0044] Fig.14 for Fig.13 A cross-sectional view of a fluid connector in which a valve core is rotated and is in an open position;

[0045] Fig.15 An exploded view of a fluid connector according to a second embodiment of the present invention;

[0046] Fig.16 is a cross-sectional view of a fluid connector according to a second embodiment of the present invention;

[0047] Fig.17 for Fig.16 A cross-sectional view of a fluid connector after docking with a complementary connector;

[0048] Fig.18 An exploded view of a fluid connector according to a third embodiment of the present invention;

[0049] Fig.19 is a cross-sectional view of a fluid connector according to a third embodiment of the present invention;

[0050] Fig. 20 for Fig.19 A cross-sectional view of a fluid connector after docking with a complementary connector;

[0051] Fig.21 for Fig. 20 A cross-sectional view of a fluid connector after the handle is turned;

[0052] Fig. 22 An exploded view of a fluid connector according to a fourth embodiment of the present invention;

[0053] Fig.23 A partial three-dimensional cross-sectional view of a fluid connector according to a fourth embodiment of the present invention;

[0054] Fig.24 A front view of a fluid connector according to a fourth embodiment of the present invention;

[0055] Fig.25 for Fig.24 Sectional view along DD;

[0056] Fig.26 for Fig.25 A cross-sectional view of a fluid connector after docking with a complementary connector;

[0057] Fig. 27 for Fig.24 Sectional view along EE;

[0058] Fig.28 for Fig. 27 A cross-sectional view of a fluid connector after docking with a complementary connector;

[0059] Fig.29 for Fig.24 Sectional view along FF;

[0060] Fig.30 for Fig.29 A cross-sectional view of a fluid connector after docking with a complementary connector;

[0061] Fig.31 An exploded view of a fluid connector according to a fifth embodiment of the present invention;

[0062] Fig.32 A front view of the assembled fluid connector according to the fifth embodiment of the present invention;

[0063] Fig.33 for Fig.32 Sectional view along GG;

[0064] Fig.34 for Fig.33 A cross-sectional view of a fluid connector after docking with a complementary connector;

[0065] Fig.35 for Fig.32 Sectional view along HH;

[0066] Fig.36 for Fig.35 A cross-sectional view of a fluid connector after docking with a complementary connector;

[0067] Fig.37 An exploded view of a fluid connector according to a sixth embodiment of the present invention;

[0068] Fig.38 A perspective view of the fluid connector and the complementary connector before docking according to the first embodiment of the present invention;

[0069] Fig.39 It is a front view of the assembled fluid connector according to the first embodiment of the present invention;

[0070] Fig.40 for Fig.39 Sectional view along II;

[0071] Fig.41 for Fig.39 Sectional view along JJ;

[0072] Fig.42 for Fig.40 A cross-sectional view of the fluid connector before the driving member is rotated after the fluid connector is docked with the complementary connector;

[0073] Fig.43 for Fig.41 A cross-sectional view of the fluid connector before the driving member is rotated after the fluid connector is docked with the complementary connector;

[0074] Fig.44 for Fig.40 A cross-sectional view of the fluid connector after the drive member is rotated after the fluid connector is docked with the complementary connector;

[0075] Fig.45 for Fig.41 A cross-sectional view of a fluid connector and a complementary connector after the drive member is rotated after docking; Description of the reference numerals of the specific embodiments:

[0076] Fluid Connector 100 Housing 10 Butt joint 101 Connection surface 102 Fluid channel 103 Pin hole 104 Step surface 1041 Stop surface 1042 Boss 1043 Opening 1044 Outer surface 105 Accommodation slot 106 First side 1061 Second side 1062 Shaft groove 1063 Spool 11 Spherical outer surface 111 Through hole 112 First Pin 12 Front face 121 Backend 922 Storage tank 123 Wall 124 Protrusion 1241 First wall portion 1242 Second wall portion 1243 Blocking surface 1244 Slot 125 Limiting slot 126 Stopper 127 Second pin 13 Tooth 131 Groove 132 Limiting piece 14 Central 141 End 142 Main body 143 Clamping portion 144 Matching portion 145 Shaft 146 Fixed portion 147 Driving member 15 Pulling part 151 Sprocket 152 Bump 153 Gap 154 Elastic member 16 Elastic ring 17 Spring member 18 Back cover 19 [Specific implementation method]

[0077] In order to facilitate a better understanding of the purpose, structure, characteristics and effects of the present invention, the present invention is further described in conjunction with the accompanying drawings and specific implementation methods.

[0078] like Figures 1 to 12 FIG. 1 is a first embodiment of the present invention, which provides a fluid connector 100 suitable for fluid transmission, and is used to dock with a complementary connector 200. The fluid connector 100 includes a housing 10, a valve core 11, a first pin 12, a second pin 13, a stopper 14, a driving member 15, an elastic member 16, an elastic ring 17, and a sealing ring (not numbered). The complementary connector 200 includes a positioning hole 201.

[0079] like Figure 1 ,and Figure 8As shown, the housing 10 includes a docking surface 101, a connecting surface 102, and a fluid channel 103 that penetrates the docking surface 101 and the connecting surface 102. The docking surface 101 is located at the front end of the housing 10 and docks with the complementary connector 200 along the front-to-back direction, and the connecting surface 102 is located at the rear end of the housing 10 and is connected to the connecting pipe or manifold. In this embodiment, the housing 10 is a straight head type; in other embodiments, the housing 10 is an elbow type. The housing 10 also includes a pin hole 104 that extends through the docking surface 101 along the front-to-back direction. The housing 10 even includes an outer peripheral surface 105 and a receiving groove 106 that is recessed from the outer peripheral surface 105. The stopper 14 is positioned in the receiving groove 106. The stopper 14 and the receiving groove 106 can be loosely matched, with loose space, or the stopper 14 and the receiving groove 106 can be tightly matched, with no loose space. The elastic ring 17 is sleeved on the outer peripheral surface 105, and the elastic ring 17 covers the receiving groove 106.

[0080] like Figure 13 to Figure 14 As shown, the valve core 11 is rotatably mounted in the fluid passage 103, and the sealing ring (not numbered) is located between the housing 10 and the valve core 11. The valve core 11 includes a spherical outer surface 111 and a through hole 112 penetrating the spherical outer surface 111. The valve core 11 can rotate around the axis X between a closed position blocking the fluid passage 103 and an open position opening the fluid passage 103. The axis X is perpendicular to the front-to-back direction and intersects with the front-to-back direction. When the valve core 11 is in the closed position, the surface of the valve core 11 cooperates with the housing 10 and the sealing ring (not numbered) to completely block the fluid passage 103, thereby preventing the fluid from the docking surface 101 of the housing 10 through the fluid passage 103 to the connecting surface 102 of the housing 10. When the valve core 11 is in the open position, the through hole 112 is coaxially aligned with the fluid passage 103 and allows fluid communication therefrom.

[0081] like Figure 1 , Figure 13 to Figure 14 As shown, the driving member 15 extends through the outer circumferential surface 105 of the housing 10, and is rigidly connected to the valve core 11 by means of fasteners (not numbered) so as to rotate together with the valve core 11 around the axis X. The valve core 11 is driven to rotate by the rotation of the driving member 15, and the valve core 11 stops rotating when the driving member 15 stops rotating. The driving member 15 includes a pull portion 151 disposed near the outer circumferential surface 105 of the housing 10, and accordingly, the rotation of the pull portion 151 around the axis X drives the valve core 11 to rotate between the open position and the closed position.

[0082] like Figure 1 , Figures 3 to 8As shown, the first pin 12 is received in the pin hole 104 and moves forward and backward between the locked position and the unlocked position. The first pin 12 includes a front end face 121, a rear end face 122, and a receiving groove 123 that penetrates the front end face 121 and the rear end face 122; in other embodiments, the receiving groove 123 may not penetrate the rear end. The first pin 12 also includes a surrounding wall 124, a clearance groove 125, and a limiting groove 126 located in front of the clearance groove 125. The clearance groove 125 and the limiting groove 126 penetrate the surrounding wall 124 respectively, and the receiving groove 123 is surrounded by the surrounding wall 124. The clearance groove 125 and the limiting groove 126 are both connected to the receiving groove 123. The length of the receiving groove 106 along the front-to-back direction is less than the length of the limiting groove 126. The limiting member 14 is partially received in the limiting groove 126 and is located between the front wall of the limiting groove 126 and the rear wall of the limiting groove 126.

[0083] like Figure 10 to Figure 11 As shown, in this embodiment, the surrounding wall 124 includes a stopper 127 connected forwardly to the clearance groove 125. The driving member 15 is provided with a protrusion 153 protruding outward. When the first pin 12 is in the locked position, the stopper 127 blocks the protrusion 153 to prevent the driving member 15 from rotating; when the first pin 12 is in the unlocked position, the stopper 127 retreats, and the clearance groove 125 provides a clearance space for the protrusion 153 to allow the driving member 15 to rotate. In other embodiments, such as Fig.12 As shown, the surrounding wall 124 protrudes outward to form a stop portion 127, and the driving member 15 is provided with an inwardly recessed notch 154. When the first pin 12 is located in the locked position, the stop portion 127 is engaged with the notch 154 to prevent the driving member 15 from rotating; when the first pin 12 is located in the unlocked position, the stop portion 127 retreats and moves away from the notch 154 to allow the driving member 15 to rotate.

[0084] like Figure 5 to Figure 6 As shown, the second pin 13 is received in the receiving groove 123 and the pin hole 104. The second pin 13 can move in the pin hole 104 along the front-to-back direction. The rear end of the second pin 13 is provided with a latching tooth 131 along the front-to-back direction. The driving member 15 is also provided with a toothed disc 152, and the toothed disc 152 is adjacent to the protrusion 153 in the direction of the axis X. The toothed disc 152 passes through the clearance groove 125 and enters the receiving groove 123 to engage with the latching tooth 131, so that the rotation of the driving member 15 around the axis X drives the second pin 13 to move forward and backward in the pin hole 104. Similarly, the driving member 15 is blocked and stops rotating, which will also cause the second pin 13 to stop moving in the pin hole 104.

[0085] like Figure 5 to Figure 6As shown, the elastic member 16 is received in the pin hole 104, one end of the elastic member 16 abuts against the rear wall of the pin hole 104, and the other end abuts against the rear end face 122 of the first pin 12. When the first pin 12 is in the locked position, the rear end face 122 of the first pin 12 is located behind the meshing position between the toothed disc 152 and the latching teeth 131, and when the valve core 11 is in the closed position, the rear end of the second pin 13 extends backward beyond the rear end face 122. In other embodiments, when the valve core 11 is in the closed position, the rear end of the second pin 13 does not extend backward beyond the rear end face 122.

[0086] like Figures 7 to 9 As shown, the stopper 14 includes a middle portion 141 and end portions 142 connecting the two ends of the middle portion 141. The middle portion 141 is recessed relative to the periphery of the end portions 142, and a portion of the second pin 13 is located between the two end portions 142 when viewed in the front-to-back direction, and there is a gap between the middle portion 141 and the second pin 13.

[0087] The process of docking and undocking the fluid connector 100 and the complementary connector 200 is as follows:

[0088] like Figure 4 and Fig.10 As shown, before the fluid connector 100 is docked with the complementary connector 200, the front end of the first pin 12 extends forwardly out of the pin hole 104, and the first pin 12 is kept in the locked position. At this time, the housing 10 abuts against the end 142 of the limiting member 14 backward, and the end 142 of the limiting member 14 abuts against the rear wall of the limiting groove 126 backward, which is used to prevent the first pin 12 from moving forward; the stopper 127 blocks the protrusion 153, which is used to prevent the driving member 15 from rotating. The driving member 15 is blocked and stops rotating, which will cause the second pin 13 to stop moving in the pin hole 104, that is, the valve core 11 is in the closed position and the first pin 12 prevents the valve core 11 from rotating from the closed position to the open position; when the valve core 11 is in the closed position, the second pin 13 is located in the pin hole 104 and the front end of the second pin 13 is received in the receiving groove 123;

[0089] like Figure 5 to Figure 6 and Fig.14As shown, when the fluid connector 100 is docked with the complementary connector 200, the complementary connector 200 pushes the first pin 12, causing the first pin 12 to move backward in the pin hole 104 until the first pin 12 is in the unlocked position; then the complementary connector 200 rotates relative to the fluid connector 100, and the second pin 13 is aligned with the positioning hole 201 of the complementary connector 200. When the first pin 12 is maintained in the unlocked position, the stopper 127 has retreated to a position where it cannot block the stop protrusion 153, and the clearance groove 125 provides a clearance space for the protrusion 153 to allow the driving member 15 to rotate, that is, the first pin 12 is used to allow the valve core 11 to rotate from the closed position to the open position; and during the rotation of the valve core 11 from the closed position to the open position, the front end of the second pin 13 moves forward to extend out of the receiving groove 123 and the pin hole 104 and is received in the positioning hole 201 of the complementary connector 200.

[0090] Before the fluid connector 100 is separated from the complementary connector 200 , the pull portion 151 drives the valve core 11 to rotate from the open position to the closed position, and the front end of the second pin 13 moves backward to the retracted receiving groove 123 and the pin hole 104 .

[0091] When the fluid connector 100 is separated from the complementary connector 200, the complementary connector 200 releases the push against the first pin 12, so that the first pin 12 moves forward in the pin hole 104 under the push of the elastic member 16; when the first pin 12 moves from the unlocked position to the locked position, the front wall of the limit groove 126 moves away from the limit member 14, and the rear wall of the limit groove 126 approaches the limit member 14 until it abuts against the limit member 14. When the first pin 12 remains in the locked position, the end 142 of the limit member 14 abuts against the rear wall of the limit groove 126 backwards to prevent the first pin 12 from moving forward, the valve core 11 is in the closed position, and the first pin 12 prevents the valve core 11 from rotating from the closed position to the open position.

[0092] like Figures 15 to 17 , which is a second embodiment of the present invention, and is used for docking with a complementary connector 200 in the front-to-back direction. The fluid connector 100 includes a housing 10, a valve core 11, a first pin 12, a second pin 13, a driving member 15, an elastic member 16, an elastic ring 17, a sealing ring (not numbered), and a rear cover 19. The complementary connector 200 includes a positioning hole 201.

[0093] like Fig.15 As shown, the housing 10 includes a docking surface 101 and a fluid passage 103 penetrating the docking surface 101. The docking surface 101 is located at the front end of the housing 10 and docks with the complementary connector 200 along the front-to-back direction. The housing 10 also includes a pin hole 104 extending through the docking surface 101 along the front-to-back direction. The pin hole 104 includes an opening 1044 penetrating backward. The elastic ring 17 is sleeved on the docking surface 101 and the outer peripheral surface 105.

[0094] The valve core 11 is rotatably mounted in the fluid passage 103, and the valve core 11 includes a spherical outer surface 111 and a through hole 112 penetrating the spherical outer surface 111. The valve core 11 can rotate around the axis X between a closed position blocking the fluid passage 103 and an open position opening the fluid passage 103. The axis X is perpendicular to the front-to-back direction and intersects with the front-to-back direction. When the valve core 11 is in the closed position, the surface of the valve core 11 cooperates with the housing 10 and the sealing ring (not numbered) to completely block the fluid passage 103, thereby preventing the fluid from the docking surface 101 of the housing 10 through the fluid passage 103. When the valve core 11 is in the open position, the through hole 112 is coaxially aligned with the fluid passage 103 and allows fluid communication therefrom.

[0095] like Fig.15 As shown, the driving member 15 and the valve core 11 are fixed to each other, and the valve core 11 is driven to rotate by the driving member 15, and the valve core 11 stops rotating when the driving member 15 stops rotating. The driving member 15 includes a notch 154 that is recessed inwardly.

[0096] like Figure 16 to Figure 17 As shown, the first pin 12 is assembled into the pin hole 104 from one end of the opening 1044, and the first pin 12 is received in the pin hole 104, and the first pin 12 moves forward and backward between the locked position and the unlocked position. The first pin 12 includes a front end face 121, a rear end face 122, and a receiving groove 123 that passes through the front end face 121 and the rear end face 122; in other embodiments, the receiving groove 123 may not pass through the rear end. The first pin 12 includes a surrounding wall 124, a clearance groove 125 that passes through the surrounding wall 124, and a stopper 127 that protrudes outward from the surrounding wall 124. The receiving groove 123 is surrounded by the surrounding wall 124, and the clearance groove 125 is connected to the receiving groove 123. The pin hole 104 includes a stop surface 1042 located in front of the stopper 127. When the first pin 12 is in the locked position, the stop surface 1042 abuts rearwardly against the stop portion 127 to prevent the first pin 12 from moving forward. At this time, the stop portion 127 is engaged in the notch 154 to prevent the driving member 15 from rotating. When the first pin 12 is in the unlocked position, the stop portion 127 retreats and moves away from the notch 154 to allow the driving member 15 to rotate.

[0097] like Fig.16 As shown, the second pin 13 is received in the receiving groove 123 and the pin hole 104. The second pin 13 can move in the pin hole 104 along the front-to-back direction. The rear end of the second pin 13 is provided with a latching tooth 131 along the front-to-back direction. The driving member 15 is also provided with a toothed disc 152, and the toothed disc 152 is adjacent to the notch 154 in the direction of the axis X. The toothed disc 152 passes through the clearance groove 125 and enters the receiving groove 123 to engage with the latching tooth 131, so that the rotation of the driving member 15 around the axis X drives the second pin 13 to move forward and backward in the pin hole 104. Similarly, the driving member 15 is blocked and stops rotating, which causes the second pin 13 to stop moving in the pin hole 104.

[0098] like Figure 16 to Figure 17 As shown, the elastic member 16 is received in the pin hole 104, the rear cover 19 is located at the opening 1044, one end of the elastic member 16 abuts against the rear cover 19, and the other end abuts against the first pin 12. When the first pin 12 is in the locked position, the rear end face 122 of the first pin 12 is located behind the meshing position between the toothed disc 152 and the latching teeth 131, and when the valve core 11 is in the closed position, the rear end of the second pin 13 extends backward beyond the rear end face 122. In other embodiments, when the valve core 11 is in the closed position, the rear end of the second pin 13 does not extend backward beyond the rear end face 122.

[0099] The process of docking and undocking the fluid connector 100 and the complementary connector 200 is as follows:

[0100] like Fig.16 As shown, before the fluid connector 100 is docked with the complementary connector 200, the front end of the first pin 12 extends forward from the pin hole 104, and the first pin 12 is kept in the locked position. At this time, the stop surface 1042 abuts the stop portion 127 backward to prevent the first pin 12 from moving forward, and the stop portion 127 is inserted into the notch 154 to prevent the driving member 15 from rotating. The driving member 15 is blocked and stops rotating, which causes the second pin 13 to stop moving in the pin hole 104, that is, the valve core 11 is in the closed position and the first pin 12 prevents the valve core 11 from rotating from the closed position to the open position; when the valve core 11 is in the closed position, the second pin 13 is located in the pin hole 104 and the front end of the second pin 13 is received in the receiving groove 123;

[0101] like Fig.17 As shown, when the fluid connector 100 is docked with the complementary connector 200, the complementary connector 200 pushes the first pin 12, so that the first pin 12 moves backward in the pin hole 104 until the first pin 12 is maintained in the unlocked position; then the complementary connector 200 rotates relative to the fluid connector 100, and the second pin 13 is aligned with the positioning hole 201 of the complementary connector 200. When the first pin 12 is in the unlocked position, the stopper 127 has retreated to a position away from the notch 154 to allow the drive member 15 to rotate, that is, the first pin 12 is used to allow the valve core 11 to rotate from the closed position to the open position; and during the rotation of the valve core 11 from the closed position to the open position, the front end of the second pin 13 moves forward to extend out of the receiving groove 123 and the pin hole 104 and is received in the positioning hole 201 of the complementary connector 200.

[0102] Before the fluid connector 100 is separated from the complementary connector 200 , the driving member 15 drives the valve core 11 to rotate from the open position to the closed position, and the front end of the second pin 13 moves backward to the retracted receiving groove 123 and the pin hole 104 .

[0103] When the fluid connector 100 is separated from the complementary connector 200, the complementary connector 200 releases the push against the first pin 12, so that the first pin 12 moves forward in the pin hole 104 under the push of the elastic member 16; when the first pin 12 moves from the unlocked position to the locked position, the stopper 127 approaches the stop surface 1042 of the pin hole 104 until it abuts forward against the stop surface 1042. When the first pin 12 remains in the locked position, the stop surface 1042 abuts backward against the stopper 127 to prevent the first pin 12 from moving forward, and the stopper 127 is inserted into the notch 154 to prevent the driving member 15 from rotating, that is, the valve core 11 is in the closed position and the first pin 12 prevents the valve core 11 from rotating from the closed position to the open position.

[0104] like Figures 18 to 21 , which is a third embodiment of the present invention, and is used for docking with a complementary connector 200 in the front-to-back direction. The fluid connector 100 includes a housing 10, a valve core 11, a first pin 12, a second pin 13, a stopper 14, a drive member 15, an elastic member 16, an elastic ring 17, and a sealing ring (not numbered). The stopper 14 is a metal ball. The complementary connector 200 includes a positioning hole 201.

[0105] like Figure 18 to Figure 19 As shown, the housing 10 includes a docking surface 101 and a fluid channel 103 that penetrates the docking surface 101. The docking surface 101 is located at the front end of the housing 10 and docks with the complementary connector 200 along the front-to-back direction. The housing 10 also includes a pin hole 104 that extends through the docking surface 101 along the front-to-back direction. The housing 10 even includes an outer peripheral surface 105 and a receiving groove 106 that is recessed from the outer peripheral surface 105. The stopper 14 is positioned in the receiving groove 106. The stopper 14 and the receiving groove 106 are loosely matched and there is room for looseness. The elastic ring 17 is sleeved on the outer peripheral surface 105, and the elastic ring 17 covers the receiving groove 106. The receiving groove 106 includes a first surface 1061 and a second surface 1062 that extends forward from the first surface 1061 and toward the first pin 12, and the second surface 1062 is an inclined surface.

[0106] The valve core 11 is rotatably mounted in the fluid passage 103, and the valve core 11 includes a spherical outer surface 111 and a through hole 112 penetrating the spherical outer surface 111. The valve core 11 can rotate around the axis X between a closed position blocking the fluid passage 103 and an open position opening the fluid passage 103. The axis X is perpendicular to the front-to-back direction and intersects with the front-to-back direction. When the valve core 11 is in the closed position, the surface of the valve core 11 cooperates with the housing 10 and the sealing ring (not numbered) to completely block the fluid passage 103, thereby preventing the fluid from the docking surface 101 of the housing 10 through the fluid passage 103. When the valve core 11 is in the open position, the through hole 112 is coaxially aligned with the fluid passage 103 and allows fluid communication therefrom.

[0107] like Fig.18 As shown, the driving member 15 and the valve core 11 are fixed to each other, and the valve core 11 is driven to rotate by the driving member 15 , and when the driving member 15 stops rotating, the valve core 11 also stops rotating.

[0108] like Figure 19 to Figure 20 As shown, the first pin 12 is received in the pin hole 104 and moves forward and backward between the locked position and the unlocked position. The first pin 12 includes a front end face 121, a rear end face 122, and a receiving groove 123 that penetrates the front end face 121 and the rear end face 122; in other embodiments, the receiving groove 123 may not penetrate the rear end. The first pin 12 also includes a surrounding wall 124, a clearance groove 125, and a limiting groove 126 located in front of the clearance groove 125. The clearance groove 125 and the limiting groove 126 penetrate the surrounding wall 124 respectively. The receiving groove 123 is surrounded by the surrounding wall 124, and the clearance groove 125 and the limiting groove 126 are both connected to the receiving groove 123. The length of the receiving groove 106 along the front-to-back direction is greater than the length of the limiting groove 126, and the limiting member 14 is partially received in the receiving groove 106 and positioned in the limiting groove 126. The limiting member 14 and the limiting groove 126 are loosely matched, and there is space for looseness. The first pin 12 moves forward and backward, driving the limiting member 14 to move forward and backward in the receiving groove 106 .

[0109] like Figure 20 to Figure 21 As shown, the second pin 13 is received in the receiving groove 123 and the pin hole 104. The second pin 13 can move in the pin hole 104 along the front-to-back direction. The rear end of the second pin 13 is provided with a latching tooth 131 along the front-to-back direction. The driving member 15 is also provided with a toothed disc 152. In this embodiment, the toothed disc 152 passes through the clearance groove 125 and enters the receiving groove 123 to engage with the latching tooth 131, so that the rotation of the driving member 15 around the axis X drives the second pin 13 to move forward and backward in the pin hole 104. Similarly, the second pin 13 is blocked in the pin hole 104 and stops moving, which also causes the driving member 15 to stop rotating.

[0110] like Figure 19 to Figure 20As shown, the elastic member 16 is received in the pin hole 104, one end of the elastic member 16 abuts against the rear wall of the pin hole 104, and the other end abuts against the rear end face 122 of the first pin 12. When the first pin 12 is in the locked position, the rear end face 122 of the first pin 12 is located behind the meshing position between the toothed disc 152 and the latching tooth 131, and when the valve core 11 is in the closed position, the rear end of the second pin 13 extends backward beyond the rear end face 122. In other embodiments, when the valve core 11 is in the closed position, the rear end of the second pin 13 does not extend backward beyond the rear end face 122. In other embodiments, since the first pin 12 is not provided with the clearance groove 125, the toothed disc 152 directly enters the pin hole 104 from the rear of the first pin 12 and meshes with the latching tooth 131, so that the rotation of the driving member 15 around the axis X drives the second pin 13 to move forward and backward in the pin hole 104, and similarly, the second pin 13 is blocked and stops moving, causing the driving member 15 to also stop rotating. The pin hole 104 includes a step surface 1041 opposite to the rear end surface 122. The elastic member 16 is received in the pin hole 104, with one end thereof abutting against the step surface 1041 of the pin hole 104 and the other end abutting against the rear end surface 122. When the first pin 12 is in the locked position, the rear end surface 122 of the first pin 12 and the step surface 1041 of the pin hole 104 are both located in front of the mutual meshing position between the toothed disc 152 and the latching teeth 131; when the valve core 11 is in the closed position, the rear end of the second pin 13 extends backward beyond the step surface 1041. The second pin 13 is also provided with a groove 132, which is used to cooperate with the stopper 14.

[0111] The process of docking and undocking the fluid connector 100 and the complementary connector 200 is as follows:

[0112] like Fig.19 As shown, before the fluid connector 100 is docked with the complementary connector 200, the front end of the first pin 12 extends forward from the pin hole 104, and the first pin 12 is maintained in the locked position. At this time, the shell 10 abuts against the limit member 14 backward, and the limit member 14 abuts against the rear wall of the limit groove 126 backward to prevent the first pin 12 from moving forward. In this embodiment, the groove 132 is partially aligned with the limit groove 126, and the second surface 1062 limits the limit member 14 so that the limit member 14 is received in the groove 132, so that the limit member 14 prevents the second pin 13 from moving forward. In other embodiments, the groove 132 is completely aligned with the limiting groove 126, and the second surface 1062 limits the limiting member 14 so that the limiting member 14 is received in the groove 132, so that the limiting member 14 prevents the second pin 13 from moving forward, and the second pin 13 is blocked and stops moving, causing the driving member 15 to also stop rotating, and further causing the valve core 11 to stop rotating, that is, the valve core 11 is in the closed position and the first pin 12 prevents the valve core 11 from rotating from the closed position to the open position; when the valve core 11 is in the closed position, the second pin 13 is located in the pin hole 104 and the front end of the second pin 13 is received in the receiving groove 123;

[0113] like Figure 20 to Figure 21As shown, when the fluid connector 100 is docked with the complementary connector 200, the complementary connector 200 pushes the first pin 12, so that the first pin 12 moves backward in the pin hole 104 until the first pin 12 is kept in the unlocked position, and the limiting groove 126 moves backward to drive the limiting member 14 to move from the corresponding position of the second surface 1062 to the corresponding position of the first surface 1061, and the second surface 1062 releases the restriction on the limiting member 14; then the complementary connector 200 rotates relative to the fluid connector 100, and the second pin 13 is aligned with the positioning hole 201 of the complementary connector 200. When the first pin 12 is in the unlocked position, the groove 132 is aligned with the limiting groove 1 26 are misaligned with each other, that is, the groove 132 and the limiting groove 126 are completely misaligned and have no overlapping parts. The limiting member 14 is located behind the groove 132, and is used to allow the second pin 13 to move forward; at this time, the second pin 13 is driven to move forward and the valve core 11 is rotated from the closed position to the open position by rotating the driving member 15, that is, the first pin 12 is used to allow the valve core 11 to rotate from the closed position to the open position; and during the rotation of the valve core 11 from the closed position to the open position, the front end of the second pin 13 moves forward to extend out of the receiving groove 123 and the pin hole 104 and is received in the positioning hole 201 of the complementary connector 200.

[0114] Before the fluid connector 100 is separated from the complementary connector 200 , the driving member 15 drives the valve core 11 to rotate from the open position to the closed position, and the front end of the second pin 13 moves backward to the retracted receiving groove 123 and the pin hole 104 .

[0115] When the fluid connector 100 is separated from the complementary connector 200, the complementary connector 200 releases the push against the first pin 12, so that the first pin 12 moves forward in the pin hole 104 under the push of the elastic member 16; when the first pin 12 moves from the unlocked position to the locked position, the stopper 14 moves from the corresponding position of the first surface 1061 to the second surface 1062, and the second surface 1062 is used to guide the stopper 14 into the groove 132. When the first pin 12 is in the locked position, the front wall of the receiving groove 106 abuts against the stopper 14 backward to prevent the first pin 12 from moving forward. In this embodiment, the groove 132 is partially aligned with the stopper groove 126, and the second surface 1062 limits the stopper 14 so that the stopper 14 is accommodated in the groove 132, so that the stopper 14 prevents the second pin 13 from moving forward. In other embodiments, the groove 132 is completely aligned with the limiting groove 126 , and the second surface 1062 limits the limiting member 14 so that the limiting member 14 is received in the groove 132 , so that the limiting member 14 prevents the second pin 13 from moving forward.

[0116] like Figures 22 to 30, which is a fourth embodiment of the present invention, and is used for docking with a complementary connector 200 along the front-to-back direction. The fluid connector 100 includes a housing 10, a valve core 11, a first pin 12, a second pin 13, a stopper 14, a drive member 15, an elastic member 16, an elastic ring 17, a sealing ring (not numbered), and a spring-pressing member 18. The complementary connector 200 includes a positioning hole 201.

[0117] like Fig. 22 and Fig.25 As shown, the housing 10 includes a docking surface 101 and a fluid channel 103 that penetrates the docking surface 101. The docking surface 101 is located at the front end of the housing 10 and docks with the complementary connector 200 along the front-to-back direction. The housing 10 also includes a pin hole 104 that extends through the docking surface 101 along the front-to-back direction. The housing 10 even includes an outer peripheral surface 105 and a receiving groove 106 that is recessed from the outer peripheral surface 105. The limiting member 14 is positioned in the receiving groove 106. The limiting member 14 and the receiving groove 106 are loosely matched, and there is room for looseness. The elastic ring 17 is sleeved on the outer peripheral surface 105, and the elastic ring 17 covers the receiving groove 106.

[0118] The valve core 11 is rotatably mounted in the fluid passage 103, and the valve core 11 includes a spherical outer surface 111 and a through hole 112 penetrating the spherical outer surface 111. The valve core 11 can rotate around the axis X between a closed position blocking the fluid passage 103 and an open position opening the fluid passage 103. The axis X is perpendicular to the front-to-back direction and intersects with the front-to-back direction. When the valve core 11 is in the closed position, the surface of the valve core 11 cooperates with the housing 10 and the sealing ring (not numbered) to completely block the fluid passage 103, thereby preventing the fluid from the docking surface 101 of the housing 10 through the fluid passage 103. When the valve core 11 is in the open position, the through hole 112 is coaxially aligned with the fluid passage 103 and allows fluid communication therefrom.

[0119] like Fig. 22 As shown, the driving member 15 and the valve core 11 are fixed to each other, and the valve core 11 is driven to rotate by the driving member 15 , and the valve core 11 stops rotating when the driving member 15 stops rotating.

[0120] like Fig.25 , Fig. 27 and Fig.29 As shown, the first pin 12 is received in the pin hole 104 and moves forward and backward between the locked position and the unlocked position. The first pin 12 includes a front end face 121, a rear end face 122, and a receiving groove 123 that penetrates the front end face 121 and the rear end face 122; the first pin 12 also includes a surrounding wall 124 and a limiting groove 126 that penetrates the surrounding wall 124. The receiving groove 123 is surrounded by the surrounding wall 124, and the limiting groove 126 is connected to the receiving groove 123. The limiting member 14 is received in the limiting groove 126, and the surrounding wall 124 of the first pin 12 is provided with a protrusion 1241 protruding outwardly, which is used to cooperate with the limiting member 14.

[0121] like Figure 25 to Figure 26 As shown, the second pin 13 is received in the receiving groove 123 and the pin hole 104. The second pin 13 can move in the pin hole 104 along the front-to-back direction. The rear end of the second pin 13 is provided with a latching tooth 131 along the front-to-back direction. The driving member 15 is also provided with a toothed disc 152. In this embodiment, the toothed disc 152 directly enters the pin hole 104 from the rear of the first pin 12 and meshes with the latching tooth 131, so that the rotation of the driving member 15 around the axis X drives the second pin 13 to move forward and backward in the pin hole 104. Similarly, the second pin 13 is blocked in the pin hole 104 and stops moving, which will also cause the driving member 15 to stop rotating. The pin hole 104 includes a step surface 1041 opposite to the rear end surface 122. The elastic member 16 is received in the pin hole 104, one end of which abuts against the step surface 1041 of the pin hole 104, and the other end abuts against the rear end surface 122. When the first pin 12 is in the locked position, the rear end face 122 of the first pin 12 and the step face 1041 of the pin hole 104 are both located in front of the meshing position between the toothed disc 152 and the latching teeth 131; when the valve core 11 is in the closed position, the rear end of the second pin 13 extends backward beyond the step face 1041. In other embodiments, the first pin 12 further includes a clearance groove 125 penetrating the surrounding wall 124, the clearance groove 125 is located behind the limiting groove 126, the toothed disc 152 passes through the clearance groove 125 and enters the receiving groove 123 to mesh with the latching teeth 131, so that the rotation of the driving member 15 around the axis X drives the second pin 13 to move forward and backward in the pin hole 104; similarly, the second pin 13 is blocked in the pin hole 104 and stops moving, which also causes the driving member 15 to stop rotating. The second pin 13 is also provided with a groove 132, which is used to cooperate with the limiting member 14.

[0122] like Figure 22 to Figure 23 As shown, the limiting member 14 includes a main body 143, a clamping portion 144 and a matching portion 145 respectively connected to the main body 143, and the clamping portion 144 and the matching portion 145 respectively extend from the main body 143 toward the first pin 12. The accommodating groove 106 includes an axis groove 1063. The limiting member 14 also includes a rotating shaft 146 connected to one end of the main body 143 away from the matching portion 145, the rotating shaft 146 is received in the axis groove 1063 and rotates in the axis groove 1063, the clamping portion 144 is close to the matching portion 145 relative to the rotating shaft 146, the clamping portion 144 is received in the limiting groove 126, and the clamping portion 144 is located between the front wall of the limiting groove 126 and the rear wall of the limiting groove 126. In this embodiment, the limiting member 14 further includes a fixing portion 147 , and the matching portion 145 is connected to the fixing portion 147 . In other embodiments, the limiting member 14 further includes a fixing portion 147 , and the main body 143 is connected to the fixing portion 147 .

[0123] like Figure 22 to Figure 23As shown, the spring member 18 is formed by stamping and bending a metal plate, one end of the spring member 18 is connected to the fixing portion 147, and the other end is connected to the housing 10. The fixing portion 147 is located between one end of the spring member 18 connected to the fixing portion 147 and one end of the spring member 18 connected to the housing 10. One end of the spring member 18 connected to the fixing portion 147 abuts against the fixing portion 147 in a direction close to the end of the spring member 18 connected to the housing 10.

[0124] The process of docking and undocking the fluid connector 100 and the complementary connector 200 is as follows:

[0125] like Fig.25 , Fig. 27 and Fig.29 As shown, before the fluid connector 100 is docked with the complementary connector 200, the front end of the first pin 12 extends forward from the pin hole 104, and the first pin 12 is maintained in the locked position. At this time, the housing 10 abuts the limiting member 14 backward, and the retaining portion 144 of the limiting member 14 abuts the rear wall of the limiting groove 126 backward to prevent the first pin 12 from moving forward. At the same time, the retaining portion 144 passes through the limiting groove 126 and abuts the rear wall of the groove 132 backward to prevent the second pin 13 from moving forward; the second pin 13 is blocked and stops moving, causing the driving member 15 to stop rotating, and further causing the valve core 11 to stop rotating, that is, the valve core 11 is in the closed position and the first pin 12 prevents the valve core 11 from rotating from the closed position to the open position; when the valve core 11 is in the closed position, the second pin 13 is located in the pin hole 104 and the front end of the second pin 13 is received in the receiving groove 123;

[0126] like Fig.26 , Fig.28 and Fig.30As shown, when the fluid connector 100 is docked with the complementary connector 200, the complementary connector 200 pushes the first pin 12, so that the first pin 12 moves backward in the pin hole 104 until the first pin 12 is kept in the unlocked position; when the first pin 12 moves from the locked position to the unlocked position, the front wall of the limiting groove 126 moves backward to approach the retaining portion 144, the rear wall of the limiting groove 126 moves backward away from the retaining portion 144, the protrusion 1241 abuts against the matching portion 145 and the protrusion 1241 moves backward The protrusion 1241 pushes one end of the main body 143 connected to the matching portion 145 to move away from the second pin 13, driving the holding portion 144 to move away from the second pin 13; then the complementary connector 200 rotates relative to the fluid connector 100, and the second pin 13 is aligned with the positioning hole 201 of the complementary connector 200. When the first pin 12 is in the unlocked position, the rear walls of the holding portion 144 and the second pin 13 are staggered, so that the holding portion 144 allows the second pin 13 to move forward. That is, the first pin 12 is used to allow the valve core 11 to rotate from the closed position to the open position; and during the rotation of the valve core 11 from the closed position to the open position, the front end of the second pin 13 moves forward to extend out of the receiving groove 123 and the pin hole 104 and be received in the positioning hole 201 of the complementary connector 200.

[0127] Before the fluid connector 100 is separated from the complementary connector 200 , the driving member 15 drives the valve core 11 to rotate from the open position to the closed position, and the front end of the second pin 13 moves backward to the retracted receiving groove 123 and the pin hole 104 .

[0128] When the fluid connector 100 is separated from the complementary connector 200, the complementary connector 200 releases the push against the first pin 12, so that the first pin 12 moves forward in the pin hole 104 under the push of the elastic member 16; when the first pin 12 moves from the unlocked position to the locked position, the end of the spring-pressing member 18 connected to the fixing portion 147 drives the fixing portion 147 to move toward the second pin 13; the first pin 12 remains in the locked position, at which time the housing 10 abuts rearwardly against the limiting member 14, and the retaining portion 144 of the limiting member 14 abuts rearwardly against the rear wall of the limiting groove 126 to prevent the first pin 12 from moving forward, and at the same time, the retaining portion 144 passes through the limiting groove 126 and abuts rearwardly against the rear wall of the groove 132 to prevent the second pin 13 from moving forward.

[0129] like Figure 31 to Figure 36 , which is a fifth embodiment of the present invention, and is used for docking with a complementary connector 200 in the front-to-back direction. The fluid connector 100 includes a housing 10, a valve core 11, a first pin 12, a second pin 13, a driving member 15, an elastic member 16, an elastic ring 17, a sealing ring (not numbered), and a rear cover 19. The complementary connector 200 includes a positioning hole 201.

[0130] like Fig.31As shown, the housing 10 includes a docking surface 101 and a fluid passage 103 penetrating the docking surface 101. The docking surface 101 is located at the front end of the housing 10 and docks with the complementary connector 200 in the front-to-back direction. The housing 10 also includes a pin hole 104 extending through the docking surface 101 in the front-to-back direction. The pin hole 104 includes an opening 1044 penetrating backward.

[0131] The valve core 11 is rotatably mounted in the fluid passage 103, and the valve core 11 includes a spherical outer surface 111 and a through hole 112 penetrating the spherical outer surface 111. The valve core 11 can rotate around the axis X between a closed position blocking the fluid passage 103 and an open position opening the fluid passage 103. The axis X is perpendicular to the front-to-back direction and intersects with the front-to-back direction. When the valve core 11 is in the closed position, the surface of the valve core 11 cooperates with the housing 10 and the sealing ring (not numbered) to completely block the fluid passage 103, thereby preventing the fluid from the docking surface 101 of the housing 10 through the fluid passage 103. When the valve core 11 is in the open position, the through hole 112 is coaxially aligned with the fluid passage 103 and allows fluid communication therefrom.

[0132] like Fig.31 As shown, the driving member 15 and the valve core 11 are fixed to each other, and the valve core 11 is driven to rotate by the driving member 15 , and the valve core 11 stops rotating when the driving member 15 stops rotating.

[0133] like Fig.33 and Fig.35 As shown, the first pin 12 is assembled into the pin hole 104 from one end of the opening 1044, and the first pin 12 is received in the pin hole 104 and moves forward and backward between the locked position and the unlocked position. The first pin 12 includes a front end face 121, a rear end face 122, and a receiving groove 123 that penetrates the front end face 121 and the rear end face 122. The first pin 12 also includes a surrounding wall 124 and a clearance groove 125 that penetrates the surrounding wall 124. The receiving groove 123 is surrounded by the surrounding wall 124, and the clearance groove 125 is connected to the receiving groove 123. The surrounding wall 124 includes a first wall portion 1242 and a second wall portion 1243 that is connected to the first wall portion 1242 forwardly, and the first wall portion 1242 is recessed relative to the periphery of the second wall portion 1243. The second wall portion 1243 is provided with a blocking surface 1244, and the blocking surface 1244 is connected to the first wall portion 1242. The pin hole 104 includes a boss 1043 located in front of the blocking surface 1244.

[0134] like Figure 35 to Figure 36As shown, in this embodiment, the surrounding wall 124 includes a stopper 127 connected forwardly to the clearance groove 125, and the driving member 15 includes a protrusion 153 protruding outwardly. When the first pin 12 is in the locked position, the stopper 127 blocks the protrusion 153 to prevent the driving member 15 from rotating; when the first pin 12 is in the unlocked position, the stopper 127 retreats, and the clearance groove 125 provides a clearance space for the protrusion 153 to allow the driving member 15 to rotate. In other embodiments, the surrounding wall 124 protrudes outwardly to form a stopper 127, and the driving member 15 is provided with a notch 154 recessed inwardly. When the first pin 12 is in the locked position, the stopper 127 is engaged in the notch 154 to prevent the driving member 15 from rotating; when the first pin 12 is in the unlocked position, the stopper 127 retreats and moves away from the notch 154 to allow the driving member 15 to rotate.

[0135] like Figure 33 to Figure 34 As shown, the second pin 13 is received in the receiving groove 123 and the pin hole 104. The second pin 13 can move in the pin hole 104 along the front-to-back direction. The rear end of the second pin 13 is provided with a latching tooth 131 along the front-to-back direction. The driving member 15 is also provided with a toothed disc 152, which is adjacent to the protrusion 153 in the direction of the axis X. The toothed disc 152 passes through the clearance groove 125 and enters the receiving groove 123 to engage with the latching tooth 131, so that the rotation of the driving member 15 around the axis X drives the second pin 13 to move forward and backward in the pin hole 104.

[0136] like Figure 33 to Figure 34 As shown, the elastic member 16 is received in the pin hole 104, the rear cover 19 is located at the opening 1044, one end of the elastic member 16 abuts against the rear cover 19, and the other end abuts against the rear end face 122 of the first pin 12. When the first pin 12 is located at the locking position, the rear end face 122 of the first pin 12 is located behind the meshing position between the toothed disc 152 and the latching teeth 131, and when the valve core 11 is in the closed position, the rear end of the second pin 13 extends backward beyond the rear end face 122.

[0137] The process of docking and undocking the fluid connector 100 and the complementary connector 200 is as follows:

[0138] like Fig.33 and Fig.35As shown, before the fluid connector 100 is docked with the complementary connector 200, the front end of the first pin 12 extends forward from the pin hole 104, and the first pin 12 is maintained in the locked position. At this time, the first wall portion 1242 extends forward from the pin hole 104, and the boss 1043 abuts against the blocking surface 1244 backward to prevent the first pin 12 from moving forward. The stopper 127 blocks the protrusion 153 to prevent the driving member 15 from rotating. The driving member 15 is blocked and stops rotating, which causes the second pin 13 to stop moving in the pin hole 104, that is, the valve core 11 is in the closed position and the first pin 12 prevents the valve core 11 from rotating from the closed position to the open position; when the valve core 11 is in the closed position, the second pin 13 is located in the pin hole 104 and the front end of the second pin 13 is received in the receiving groove 123;

[0139] like Fig.34 and Fig.36 As shown, when the fluid connector 100 is docked with the complementary connector 200, the complementary connector 200 pushes the first pin 12, so that the first pin 12 moves backward in the pin hole 104 until the first pin 12 is maintained in the unlocked position; then the complementary connector 200 rotates relative to the fluid connector 100, and the second pin 13 is aligned with the positioning hole 201 of the complementary connector 200. When the first pin 12 is in the unlocked position, the stopper 127 has retreated to a position where it cannot block the stop protrusion 153, and the clearance groove 125 provides a clearance space for the protrusion 153 to allow the driving member 15 to rotate, that is, the first pin 12 is used to allow the valve core 11 to rotate from the closed position to the open position; and during the rotation of the valve core 11 from the closed position to the open position, the front end of the second pin 13 moves forward to extend out of the receiving groove 123 and the pin hole 104 and is received in the positioning hole 201 of the complementary connector 200.

[0140] Before the fluid connector 100 is separated from the complementary connector 200 , the driving member 15 drives the valve core 11 to rotate from the open position to the closed position, and the front end of the second pin 13 moves backward to the retracted receiving groove 123 and the pin hole 104 .

[0141] When the fluid connector 100 is separated from the complementary connector 200, the complementary connector 200 releases the resistance against the first pin 12, so that the first pin 12 moves forward in the pin hole 104 under the resistance of the elastic member 16; when the first pin 12 moves from the unlocked position to the locked position, the stopper 127 moves forward; when the first pin 12 is maintained in the locked position, the boss 1043 abuts against the blocking surface 1244 backward to prevent the first pin 12 from moving forward, and the stopper 127 blocks the protrusion 153 to prevent the driving member 15 from rotating, that is, the valve core 11 is in the closed position and the first pin 12 prevents the valve core 11 from rotating from the closed position to the open position.

[0142] like Figures 37 to 45, which is a sixth embodiment of the present invention, and is used for docking with a complementary connector 200 in the front-to-back direction. The fluid connector 100 includes a housing 10, a valve core 11, a first pin 12, a second pin 13, a driving member 15, an elastic member 16, an elastic ring 17, and a sealing ring (not numbered). The complementary connector 200 includes a positioning hole 201.

[0143] like Fig.37 As shown, the housing 10 includes a docking surface 101 and a fluid passage 103 passing through the docking surface 101. The docking surface 101 is located at the front end of the housing 10 and docks with the complementary connector 200 along the front-to-back direction. The housing 10 also includes a pin hole 104 extending through the docking surface 101 along the front-to-back direction.

[0144] The valve core 11 is rotatably mounted in the fluid passage 103, and the valve core 11 includes a spherical outer surface 111 and a through hole 112 penetrating the spherical outer surface 111. The valve core 11 can rotate around the axis X between a closed position blocking the fluid passage 103 and an open position opening the fluid passage 103. The axis X is perpendicular to the front-to-back direction and intersects with the front-to-back direction. When the valve core 11 is in the closed position, the surface of the valve core 11 cooperates with the housing 10 and the sealing ring (not numbered) to completely block the fluid passage 103, thereby preventing the fluid from the docking surface 101 of the housing 10 through the fluid passage 103. When the valve core 11 is in the open position, the through hole 112 is coaxially aligned with the fluid passage 103 and allows fluid communication therefrom.

[0145] like Fig.37 As shown, the driving member 15 and the valve core 11 are fixed to each other, and the valve core 11 is driven to rotate by the driving member 15 , and the valve core 11 stops rotating when the driving member 15 stops rotating.

[0146] like Fig.40 As shown, the first pin 12 is received in the pin hole 104, and the first pin 12 moves forward and backward between the locked position and the unlocked position. The first pin 12 includes a front end face 121, a rear end face 122, and a receiving groove 123 that penetrates the front end face 121 and the rear end face 122. The first pin 12 also includes a surrounding wall 124 and a clearance groove 125 that penetrates the surrounding wall 124. The receiving groove 123 is surrounded by the surrounding wall 124, and the clearance groove 125 is connected to the receiving groove 123. The surrounding wall 124 includes a blocking surface 1244 that is connected to the clearance groove 125 forward.

[0147] like Fig.41As shown, in this embodiment, the surrounding wall 124 includes a stopper 127 connected forwardly to the clearance groove 125, and the driving member 15 includes a protrusion 153 protruding outwardly. When the first pin 12 is located at the locked position, the stopper 127 blocks the protrusion 153 to prevent the driving member 15 from rotating; when the first pin 12 is located at the unlocked position, the stopper 127 retreats, and the clearance groove 125 provides a clearance space for the protrusion 153 to allow the driving member 15 to rotate.

[0148] like Fig.40 As shown, the size of the second pin 13 in the front-to-back direction is smaller than that of the first pin 12, and the second pin 13 is received in the receiving groove 123 and the pin hole 104. The second pin 13 can move in the pin hole 104 in the front-to-back direction. The rear end of the second pin 13 is provided with a latching tooth 131 in the front-to-back direction. The driving member 15 is also provided with a toothed disc 152, and the toothed disc 152 is adjacent to the protrusion 153 in the direction of the axis X. The toothed disc 152 passes through the clearance groove 125 and enters the receiving groove 123, and the toothed disc 152 and the latching tooth 131 are meshed with each other, so that the rotation of the driving member 15 around the axis X drives the second pin 13 to move forward and backward in the pin hole 104.

[0149] like Fig.40 and Fig.41 As shown, the elastic member 16 is received in the pin hole 104, one end of the elastic member 16 abuts against the rear wall of the pin hole 104, and the other end abuts against the rear end face 122 of the first pin 12. When the first pin 12 is in the locked position, the rear end face 122 of the first pin 12 is located behind the meshing position between the toothed disc 152 and the latching teeth 131, and when the valve core 11 is in the closed position, the rear end of the second pin 13 extends backward beyond the rear end face 122.

[0150] The process of docking and undocking the fluid connector 100 and the complementary connector 200 is as follows:

[0151] like Fig.40 and Fig.41 As shown, before the fluid connector 100 is docked with the complementary connector 200, the front end of the first pin 12 extends forward from the pin hole 104, and the first pin 12 is maintained in the locked position. At this time, the toothed disc 152 abuts against the blocking surface 1244 backward to prevent the first pin 12 from moving forward, and the stop portion 127 stops the protrusion 153 to prevent the driving member 15 from rotating. The driving member 15 is blocked and stops rotating, which will cause the second pin 13 to stop moving in the pin hole 104, that is, the valve core 11 is in the closed position and the first pin 12 prevents the valve core 11 from rotating from the closed position to the open position; when the valve core 11 is in the closed position, the second pin 13 is located in the pin hole 104, the front end of the second pin 13 is received in the receiving groove 123, and the rear end of the second pin 13 is located in the receiving groove 123.

[0152] like Fig.42 and Fig.43As shown, when the fluid connector 100 is docked with the complementary connector 200, the complementary connector 200 pushes the first pin 12, causing the first pin 12 to move backward in the pin hole 104 until the first pin 12 remains in the unlocked position; Fig.44 and Fig.45 As shown, the complementary connector 200 is then rotated relative to the fluid connector 100, and the second pin 13 is aligned with the positioning hole 201 of the complementary connector 200. When the first pin 12 is in the unlocked position, the stop portion 127 has retreated to a position where it cannot block the stop protrusion 153, and the clearance groove 125 provides a clearance space for the protrusion 153 to allow the driving member 15 to rotate, that is, the first pin 12 is used to allow the valve core 11 to rotate from the closed position to the open position; and during the rotation of the valve core 11 from the closed position to the open position, the front end of the second pin 13 moves forward to extend out of the receiving groove 123 and the pin hole 104, and the front end of the second pin 13 is received in the positioning hole 201 of the complementary connector 200.

[0153] Before the fluid connector 100 is separated from the complementary connector 200 , the driving member 15 drives the valve core 11 to rotate from the open position to the closed position, and the front end of the second pin 13 moves backward to the retracted receiving groove 123 and the pin hole 104 .

[0154] When the fluid connector 100 is separated from the complementary connector 200, the complementary connector 200 releases the resistance against the first pin 12, so that the first pin 12 moves forward in the pin hole 104 under the resistance of the elastic member 16; when the first pin 12 moves from the unlocked position to the locked position, the stopper 127 moves forward; when the first pin 12 is maintained in the locked position, the toothed disc 152 abuts against the blocking surface 1244 backward to prevent the first pin 12 from moving forward, and the stopper 127 blocks the protrusion 153 to prevent the driving member 15 from rotating, that is, the valve core 11 is in the closed position and the first pin 12 prevents the valve core 11 from rotating from the closed position to the open position.

[0155] In summary, the fluid connector of the present invention has the following beneficial effects:

[0156] 1. The first pin 12 is received in the pin hole 104 and moves between a locked position and an unlocked position. The first pin 12 includes a front end surface 121 and a receiving groove 123 penetrating the front end surface 121; the second pin 13 is received in the receiving groove 123 and the pin hole 104 and can move forward and backward, so that the first pin 12 and the second pin 13 share the same pin hole 104 and the second pin 13 at least partially occupies the internal space of the first pin 12, thereby saving the space of the housing 10;

[0157] 2. The first pin 12 includes a surrounding wall 124 and a clearance groove 125 penetrating the surrounding wall 124, which provides clearance space for the toothed disc 152, so as to facilitate the toothed disc 152 to enter the receiving groove 123 and engage with the latching teeth 131, thereby driving the latching teeth 131 to move forward and backward.

[0158] 3. When the valve core 11 is in the closed position, the rear end of the second pin 13 extends backward beyond the step surface 1041, and the distance of the second pin 13 moving forward and backward is not limited by the size of the first pin 12, which is conducive to stable docking.

[0159] 4. When the first pin 12 is in the locked position, the rear end face 122 of the first pin 12 is located in front of the meshing position of the toothed disc 152 and the latching tooth 131, providing a clearance space for the toothed disc 152, facilitating the meshing of the toothed disc 152 and the latching tooth 131, thereby driving the latching tooth 131 to move forward and backward.

[0160] 5. The elastic ring 17 is sleeved on the outer circumferential surface 105 to achieve an anti-collision function. The elastic ring 17 covers the receiving groove 106 , and the limiting member 14 is received in the receiving groove 106 . The elastic ring 17 can prevent the limiting member 14 from escaping from the receiving groove 106 .

[0161] 6. The limiting member 14 includes a middle portion 141 and end portions 142 connecting the two ends of the middle portion 141. The middle portion 141 is recessed relative to the periphery of the end portions 142. When viewed along the front-to-back direction, part of the second pin 13 is located between the two end portions 142. There is a gap between the middle portion 141 and the second pin 13. When the first pin 12 is in the locked position, the end portions 142 can abut against a larger area of ​​the rear wall of the limiting groove 126 backwards, which is conducive to stable abutment.

[0162] The above detailed description is only an explanation of the preferred embodiment of the present invention, and does not limit the patent scope of the present invention. Therefore, all equivalent technical changes made by using the description and illustrations of this creation are included in the patent scope of this creation.

Claims

1. A fluid connector, characterized in that: include: A housing, comprising a docking surface, a pin hole and a fluid passage extending axially through the docking surface, respectively, wherein the docking surface is located at a front end of the housing and docks with a complementary connector; a valve core capable of rotating between a closed position blocking a fluid passage and an open position opening the fluid passage; A first pin is received in the pin hole and moves forward and backward between a locked position and an unlocked position, the first pin comprising a front end surface and a receiving groove penetrating the front end surface; The second pin is received in the receiving groove and the pin hole and can move forward and backward. Before the fluid connector is docked with the complementary connector, the front end of the first pin extends forward from the pin hole, and the first pin is kept in the locked position. At this time, the valve core is in the closed position and the first pin prevents the valve core from rotating from the closed position to the open position; when the valve core is in the closed position, the second pin is located in the pin hole and the front end of the second pin is received in the receiving groove; When the fluid connector is mated with the complementary connector, the complementary connector pushes against the first pin, causing the first pin to move backward in the pin hole until the first pin is held in the unlocked position; When the first pin is in the unlocked position, the first pin is used to allow the valve core to rotate from the closed position to the open position; and during the rotation of the valve core from the closed position to the open position, the front end of the second pin moves forward to extend out of the receiving groove and the pin hole and be received in the complementary connector.

2. The fluid connector according to claim 1, characterized in that: It also includes a driving member, which is fixed to the valve core, and the valve core is driven to rotate by the rotation of the driving member. The driving member is provided with a toothed disk, and the first pin includes a surrounding wall and a clearance groove penetrating the surrounding wall, and the receiving groove is formed by the surrounding wall, and the clearance groove is connected to the receiving groove. A latching tooth is provided along the axial direction at the rear end of the second pin, and the toothed disk passes through the clearance groove and enters the receiving groove to engage with the latching tooth, and the second pin is driven to move forward and backward by the rotation of the driving member.

3. The fluid connector according to claim 2, characterized in that: The surrounding wall comprises a blocking surface connected forwardly to the clearance groove. When the first pin is located at the locking position, the toothed disc abuts against the blocking surface backwardly to prevent the first pin from moving forwardly.

4. The fluid connector according to claim 1, wherein: The first pin includes a rear end face, the receiving groove extends rearwardly through the rear end face, the pin hole includes a step surface opposite to the rear end face, an elastic member is received in the pin hole, one end of the elastic member abuts against the step surface of the pin hole, and the other end abuts against the rear end face, when the valve core is in a closed position, the rear end of the second pin extends rearwardly beyond the step surface.

5. The fluid connector according to claim 4, characterized in that: The spool is moved forwards and the second pin is moved forwards and the second pin is moved backwards and the second pin is moved back and forth along the spool.

6. The fluid connector according to claim 1, characterized in that: It also includes a driving member, which is fixed to the valve core and drives the valve core to rotate by rotating the driving member. The driving member includes a protrusion protruding outward. The first pin includes a surrounding wall and a clearance groove penetrating the surrounding wall. The receiving groove is formed by the surrounding wall. The clearance groove is connected to the receiving groove. The surrounding wall includes a stopper connected forwardly to the clearance groove. When the first pin is located in the locked position, the stopper stops the protrusion to prevent the driving member from rotating. When the first pin is located in the unlocked position, the stopper retreats, and the clearance groove provides a clearance space for the protrusion to allow the driving member to rotate.

7. The fluid connector according to claim 1, wherein: It also includes a driving member, which is fixed to the valve core, and the valve core is driven to rotate by the rotation of the driving member. The driving member includes an inwardly recessed notch, and the first pin includes a surrounding wall and a stopper protruding outward from the surrounding wall. The receiving groove is formed by the surrounding wall. When the first pin is located in the locked position, the stopper is engaged in the notch to prevent the driving member from rotating; when the first pin is located in the unlocked position, the stopper retreats and moves away from the notch to allow the driving member to rotate.

8. The fluid connector according to claim 7, characterized in that: The pin hole comprises a stop surface located in front of the stop portion. When the first pin is located at the locking position, the stop surface abuts the stop portion backwards to prevent the first pin from moving forward.

9. The fluid connector according to claim 1, characterized in that: The shell also includes an outer circumferential surface and a receiving groove recessed from the outer circumferential surface, a limit piece is received in the receiving groove, an elastic ring is sleeved on the outer circumferential surface, the elastic ring covers the receiving groove, when the first pin is in the locked position, the shell abuts rearwardly against the limit piece, and the limit piece abuts rearwardly against the first pin to prevent the first pin from moving forward.

10. The fluid connector according to claim 1, wherein: The first pin includes a surrounding wall and a limiting groove penetrating the surrounding wall. The receiving groove is formed by the surrounding wall. The limiting groove is connected to the receiving groove. A limiting member is received in the limiting groove. When the first pin is located in the locked position, the shell abuts against the limiting member backwards, and the limiting member abuts against the rear wall of the limiting groove backwards to prevent the first pin from moving forward.

11. The fluid connector according to claim 10, characterized in that: The shell also includes a receiving groove, which is connected to the limiting groove. The length of the receiving groove along the front-to-back direction is smaller than the length of the limiting groove. The limiting member is positioned in the receiving groove and is located between the front wall of the limiting groove and the rear wall of the limiting groove. When the first pin moves from the unlocking position to the locking position, the front wall of the limiting groove moves away from the limiting member, and the rear wall of the limiting groove approaches the limiting member until it abuts against the limiting member forward.

12. The fluid connector according to claim 10, characterized in that: The shell also includes a receiving groove, which is connected to the limiting groove. The limiting member is accommodated in the receiving groove. The limiting member includes a middle part and ends connecting the two ends of the middle part. The middle part is recessed relative to the periphery of the end part. When observed along the front-to-back direction, the part of the second pin is located between the two ends. There is a gap between the middle part and the second pin. When the first pin is in the locked position, the end part abuts against the rear wall of the limiting groove backwards.

13. The fluid connector according to claim 10, wherein: The shell also includes a receiving groove, which is connected to the limiting groove. The length of the receiving groove along the front-to-back direction is greater than the length of the limiting groove. The limiting member is accommodated in the receiving groove and positioned in the limiting groove. The first pin moves forward and backward to drive the limiting member to move forward and backward in the receiving groove. When the first pin is in the locked position, the front wall of the receiving groove abuts against the limiting member backward to prevent the first pin from moving forward.

14. The fluid connector according to claim 10, wherein: The second pin is provided with a groove, and the first pin moves forward and backward to drive the limiting member to move forward and backward. When the first pin is in the locked position, the groove is at least partially aligned with the limiting slot, and the groove accommodates the limiting member, so that the limiting member prevents the second pin from moving forward. When the first pin is in the unlocked position, the groove is misaligned with the limiting slot, and the limiting member is located behind the groove to allow the second pin to move forward.

15. The fluid connector according to claim 14, characterized in that: The shell body also includes a receiving groove, which is connected to the limiting groove. The limiting member is accommodated in the receiving groove. The first pin moves forward and backward to drive the limiting member to move forward and backward in the receiving groove. The receiving groove includes a first surface and a second surface extending forward from the first surface and close to the first pin. The second surface is an inclined surface. When the first pin moves from the unlocking position to the locking position, the limiting member moves from the corresponding position of the first surface to the second surface. The second surface is used to guide the limiting member into the groove.

16. The fluid connector according to claim 10, wherein: The surrounding wall of the first pin is provided with a protrusion protruding outward, and the second pin is provided with a groove. The limiting member includes a main body, a clamping portion and a matching portion respectively connected to the main body, the clamping portion and the matching portion respectively extend from the main body toward the first pin, and when the first pin is located in the locked position, the clamping portion passes through the limiting groove and abuts against the rear wall of the groove backward to prevent the second pin from moving forward; when the first pin moves from the locked position to the unlocked position, the protrusion abuts against the matching portion and the protrusion moves backward, and the protrusion pushes one end of the main body connected to the matching portion to move in a direction away from the second pin, driving the clamping portion to move in a direction away from the second pin; when the first pin is located in the unlocked position, the rear walls of the clamping portion and the second pin are staggered with each other, so that the clamping portion allows the second pin to move forward.

17. The fluid connector according to claim 16, wherein: The shell also includes a receiving groove, in which a limit member is received, the receiving groove includes an axis groove, the limit member includes a rotating shaft connected to one end of the main body away from the matching part, the rotating shaft is received in the axis groove and rotates in the axis groove, the clamping part is close to the matching part relative to the rotating shaft, one of the main body and the matching part is connected to a fixed part, one end of a spring-pressing member is connected to the fixed part, and the other end is connected to the shell, the spring-pressing member abuts the fixed part toward the second pin, and when the first pin moves from the unlocking position to the locking position, one end of the spring-pressing member connected to the fixed part drives the fixed part to move toward the direction close to the second pin.

18. The fluid connector according to claim 17, wherein: The spring-pressing member is formed by stamping and bending a metal plate. The fixing portion is located between one end of the spring-pressing member connected to the fixing portion and one end of the spring-pressing member connected to the shell. One end of the spring-pressing member connected to the fixing portion abuts against the fixing portion in a direction close to one end of the spring-pressing member connected to the shell.

19. The fluid connector according to claim 1, wherein: The first pin includes a surrounding wall, and the receiving groove is surrounded by the surrounding wall. The surrounding wall includes a first wall portion and a second wall portion connected to the first wall portion forwardly. The second wall portion protrudes relative to the periphery of the first wall portion to form a blocking surface. The blocking surface is connected to the first wall portion. The pin hole includes a boss located in front of the blocking surface. When the first pin is in the locked position, the first wall portion extends forwardly out of the pin hole, and the boss abuts backward against the blocking surface to prevent the first pin from moving forward.

20. The fluid connector according to claim 1, wherein: The pin hole includes an opening that penetrates backwards. The first pin is assembled into the pin hole from one end of the opening. A rear cover is located at the opening. An elastic member is accommodated in the pin hole, one end of which abuts against the rear cover and the other end abuts against the first pin.

21. The fluid connector according to claim 1, wherein: The first pin includes a rear end face, and the receiving groove extends backward through the rear end face. The size of the second pin along the front-to-back direction is smaller than that of the first pin. Before the fluid connector is docked with the complementary connector, the rear end of the second pin is located in the receiving groove.

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