Sterile connector

Abstract

The utility model discloses a sterile connector which comprises two connecting bodies. Each connecting body is provided with a connector, a main plate, an annular sealing part, a first connecting piece and a second connecting piece. The first connecting piece comprises a first extending part and a first clamping part; the second connecting piece comprises a second extending part and a second clamping part; the first clamping part of the first connecting piece of one connecting main body is in buckling connection with the second clamping part of the second connecting piece of the other connecting main body, so that the integrated sterile connector is formed; a cantilever part is formed at the position, corresponding to at least one of the starting end of the first extension part and the starting end of the second extension part, of the main plate, the starting end of the first extension part and / or the starting end of the second extension part are / is connected with the cantilever part, and the cantilever part is suspended relative to the main plate. According to the utility model, the cantilever part which is easy to deform when being pressed is formed, so that the first connecting piece or / and the second connecting piece can synchronously deform along with the deformation of the cantilever part, and the first clamping part and the second clamping part can be quickly clamped in place.

Description

Technical Field

[0001] The utility model relates to the technical field of pipeline connection, in particular to a sterile connector. Background Technique

[0002] A sterile connector is used to connect two or more sterilized fluid passages. Chinese Patent CN216843590U discloses a sterile connector and a connector assembly. After installation, the first seal and the second seal respectively protrude from the first surface and the second surface, so that the first seal and the second seal can be abutted against each other to achieve antibacterial sealing when the first surface and the second surface are axially butted. The first seal has a first seal part and a second seal part, and the dimensions of the first seal part and the second seal part protruding from the first surface are different; the second seal has a third seal part and a fourth seal part, and the dimensions of the third seal part and the fourth seal part protruding from the second surface are different; to form a first relative position in space, so that the second seal part and the fourth seal part are deformed first. If the first film and the second film are pulled out at this time, the frictional force of the film being squeezed by the first seal part and the second seal part is not enough to cause them to break, thus achieving the effect of facilitating the pulling out of the film. At the same time, it can also play a short-term antibacterial sealing role; after pulling out the first film and the second film, further axially press the first sterile connector and the second sterile seal to make the first seal ring and the second seal ring abut against each other to form a second relative position in space to achieve the effect of stable antibacterial sealing.

[0003] The above structure has the following defects. When the end faces of the first main body and the second main body are opposed to each other and the two main bodies are axially squeezed towards each other to connect the two main bodies, due to the too high rigidity of the mutually matching insert and the receiving part, when axially squeezing the two main bodies towards each other, a very large force is required to squeeze the insert into the clamping space of the receiving part, and the operation is very laborious.

[0004] In order to ensure that the tongue portion of the insert can be squeezed into the insertion space along the guide surface of the receiving part, the width of the tongue portion and the guide surface protruding is limited and should not be too large, otherwise it will further increase the axial force of squeezing the two main bodies in the connection process. Therefore, the width of the tongue portion and the guide surface protruding from the corresponding side walls is subject to certain restrictions, and the protruding range should not be too large. In the subsequent use process of forming a complete connector, the pulling force between the insert and the receiving part pulled against each other will generate a torque that pushes the insert to deform in the direction away from the receiving part. The specific formation method is that the clamping end face of the insert and the clamping end face of the receiving part are against each other to form an undercut structure. The point of force between the two and the connection point of the insert / receiving part and the main body are respectively located on both sides of the tongue portion, and a certain distance is formed between the two, and the direction of the force is almost perpendicular to the end face of the main body, so that the force forms a torque relative to the connection point of the insert / receiving part and the main body, and the torque causes the insert to rotate around the connection point in the direction away from the receiving part, thereby causing the insert and the receiving part to disengage.

[0005] In view of this, this application is filed. Summary of the invention

[0006] In order to overcome the shortcomings of the prior art, the utility model provides a sterile connector, which forms a cantilever portion at the starting end of the first extension portion and / or the starting end of the second extension portion corresponding to the main board, so that the first connecting member and / or the second connecting member are easier to deform, reducing the axial squeezing force of the two connecting bodies, facilitating the quick connection between the two, and making the operation more labor-saving.

[0007] The technical solution adopted by the utility model to solve its technical problems is:

[0008] A sterile connector comprises two connecting bodies:

[0009] The connecting body comprises a joint with a hollow interior forming a flow channel, a main plate formed at one end of the joint, an annular sealing portion arranged around the outer periphery of the flow channel opening, and a first connecting member and a second connecting member located at an end surface of the main plate away from the joint and arranged oppositely at two sides of the flow channel opening;

[0010] The first connecting member includes a first extending portion whose starting end is connected to the main board and a first clamping portion formed at the end of the first extending portion;

[0011] The second connecting member includes a second extending portion whose starting end is connected to the main board and a second clamping portion formed at the end of the second extending portion;

[0012] The first clamping portion of the first connector of one of the connecting bodies forms a snap connection with the second clamping portion of the second connector of the other connecting body to form an integrated sterile connector;

[0013] At least one of the starting ends of the main board corresponding to the first extension part and the second extension part forms a cantilever part. The starting end of the first extension part and / or the starting end of the second extension part are connected to the cantilever part, and the cantilever part is arranged to be suspended relative to the main board.

[0014] In the aseptic connector of the present utility model, by forming a cantilever part at least at one of the starting ends of the main board corresponding to the first extension part and the second extension part, the cantilever part is an area where the thickness of the main board is reduced and extends a certain length both radially and circumferentially. On the premise that the cantilever part is connected to the main board, it is suspended relative to the main board. Furthermore, the stiffness of the cantilever part is relatively small, and it is prone to deformation under pressure. Therefore, when the first connector and / or the second connector are connected to the cantilever part, the first connector and / or the second connector can also deform synchronously with the deformation of the cantilever part. The deformation is more likely to occur and the deformation amplitude is larger. Thus, the axial squeezing force for squeezing the two connection bodies towards each other can be significantly reduced. When the first connector of one connection body contacts and exerts a mutual squeezing effect on the second connector of the other mating connection body, the two can quickly deform and the deformation amplitude is large. Correspondingly, the first latching part of the first connector and the second latching part of the second connector can be quickly latched and positioned.

[0015] Furthermore, the cantilever part includes a first area and a second area connected integrally. The second area is connected to the starting end of the first extension part, and the first area and the first latching part are located on the same side of the first extension part.

[0016] The first area of the cantilever part is connected to the main board. The first area and the first latching part are located on the same side of the first extension part, that is, the connection point between the cantilever part and the main board and the first latching part are arranged on the same side of the first extension part. It changes the relative rotation fulcrum between the first connector and the main board through the cantilever part, so that the mutual cooperation force points among the rotation fulcrum, the first connector and the second connector are located on the same side of the first extension part. Under the action of the moment, the first extension part rotates towards the side where the rotation fulcrum is located along with the cantilever part, that is, the first connector rotates towards the direction of being more tightly latched with the second connector, overcoming the defect in the prior art that the moment causes the insert part to rotate around the connection point towards the direction away from the receiving part, making the first latching part and the second latching part more tightly latched, and the pressure resistance strength after the two are connected in cooperation is higher.

[0017] Furthermore, the length by which the first area protrudes from the first extension part is L1, and the maximum distance between the center of the first latching part and the side wall of the first extension part is L2, then L1 - L2 ≤ 1 mm.

[0018] The difference between L1 and L2 is designed to be less than or equal to 1 mm, so as to avoid damage to the cantilever due to excessive deformation caused by excessive torque. On the basis that the cantilever can reduce the external force required for operation during the clamping fit between the first connecting member and the second connecting member, it is possible to avoid damage to the cantilever caused by excessive deformation; in addition, the above design reduces the distance between the relative rotation fulcrum of the first connecting member and the motherboard and the force application point between the first connecting member and the second connecting member. During the use of the sterile connector as a whole, the torque is reduced, and the rotation amplitude of the first connecting member relative to the rotation fulcrum is smaller, so that the clamping between the first connecting member and the second connecting member is tighter and more stable, and the first connecting member and the second connecting member are prevented from disengaging from each other.

[0019] Further, the axial length H1 of the first extension and the axial length H2 of the second extension satisfy:

[0020] H1 - H2 = 3 - 4 mm.

[0021] The axial length of the first extension is greater than that of the second extension, making the first extension more likely to deform than the second extension. Thus, the first extension mainly plays the role of deformation, while the second extension is not easily deformed and mainly plays the role of stable clamping. On the basis of labor-saving clamping operation between the first connecting member and the second connecting member, the stability of their clamping is ensured, and during the clamping assembly process, inaccurate clamping caused by large deformations of both the first extension and the second extension is avoided; and the difference between H1 and H2 is between 3 - 4 mm, which avoids too large a length difference between the first extension and the second extension, ensures their effective clamping, and at the same time ensures the structural stability after their clamping. In addition, it avoids too large a length of the first extension, thereby avoiding too large a length of the main body and too large a volume of the sterile connector as a whole.

[0022] Further, the axial thickness of the cantilever is 20 - 40% of the axial thickness of the motherboard.

[0023] If the ratio of the two is less than 20%, the cantilever is likely to break when rotating under force; if the ratio is greater than 40%, the cantilever is difficult to deform under force, or the deformation under force is small, resulting in difficult clamping between the two connecting members. With such a setting, on the premise of ensuring that the cantilever can provide sufficient deformation and easy clamping of the two connecting members, the cantilever is ensured to have sufficient strength to avoid damage during the clamping process between the first connecting member and the second connecting member.

[0024] Further, the cantilever is perpendicularly connected to the first extension or the second extension; the first clamping portion is a convex block protruding from the outer wall of the first extension and corresponding to the cantilever, and the convex block has a first clamping surface, which extends obliquely outward from the side wall of the first extension in a direction tending to be close to the end face of the motherboard, and its inclination angle is 3 - 7°.

[0025] The cantilever part is perpendicularly connected to the first extension part or the second extension part, so that the force applied by the mutual cooperation between the first connecting piece and the second connecting piece is along the direction perpendicular to the end face of the main board. At this time, there will be no more component forces, ensuring the axial stable connection between the first connecting piece and the second connecting piece; the setting of the inclination angle of the first engaging surface enables it to form a helical tooth engaging structure with the second engaging part, making the snap connection between the first connecting piece and the second connecting piece more stable. Even when the first engaging part has a tendency to rotate away from the second engaging part, the second engaging part will not disengage from the first engaging part.

[0026] Furthermore, the second engaging part includes a second engaging surface and a third engaging surface that are axially separated. Both the second engaging surface and the third engaging surface can be snap-connected to the first engaging part. The inclination directions of the second engaging surface and the third engaging surface are the same, and the inclination angle of the second engaging surface is smaller than that of the third engaging surface.

[0027] When the first connection body and the second connection body are axially butted, first, they slide in cooperation through the first engaging surface and the second engaging surface, and then they slide in cooperation through the first engaging surface and the third engaging surface. Thus, by the setting of the second engaging surface and the third engaging surface, the first connecting piece and the second connecting piece have two sealing positions, facilitating the effective sealed docking of the sterile connector. Moreover, the inclination angle of the second engaging surface is smaller than that of the third engaging surface, making the final cooperation between the first engaging surface and the third engaging surface stable.

[0028] Furthermore, when the two connection bodies are axially butted, there is a gap between the end of the first connecting piece or the end of the second connecting piece and the corresponding end face of the main board.

[0029] This gap setting can ensure that the first engaging part can be smoothly snap-inserted into the space below the second engaging part, avoiding interfering with the snap connection between the first engaging part and the second engaging part, and also ensuring that the first engaging surface of the first engaging part and the third engaging surface of the second engaging part can contact and engage in the largest range.

[0030] Furthermore, the main board of the connection body is provided with a matching anti-rotation protrusion and anti-rotation recess. When the two connection bodies are butted, the anti-rotation protrusion is inserted into the anti-rotation recess to enable the two connection bodies to be anti-rotationally matched.

[0031] The design of the anti-rotation protrusion and the anti-rotation recess is beneficial to the accurate and rapid alignment connection of the two connection bodies.

[0032] Furthermore, the anti-rotation protrusions and anti-rotation recesses are respectively arranged on both sides of the first connecting piece and both sides of the second connecting piece, and the positions of the anti-rotation protrusions and anti-rotation recesses on both sides of the first connecting piece are swapped with their positions on both sides of the second connecting piece.

[0033] Such a setting enables the first connecting body and the second connecting body to be axially butted, so that the first connecting member and the second connecting member can be quickly and accurately butted and inserted, improving the assembly efficiency, avoiding deviation during butting, and being convenient for processing and manufacturing at the same time.

[0034] Further, the annular sealing portion includes an inner annular seal and an outer annular seal. The main board of the connecting body forms an installation groove on the outer periphery of the flow channel opening. A plurality of limiting blocks are provided on the inner bottom surface of the installation groove, and the plurality of limiting blocks are arranged at intervals along the circumferential direction of the circle. The outer annular seal is hermetically clamped between the inner wall of the installation groove and the outer side wall of the limiting block, the outer wall of the inner annular seal is hermetically attached to the inner side wall of the limiting block, and the inner wall of the inner annular seal surrounds the outer periphery of the flow channel opening.

[0035] The inner annular seal and the outer annular seal form a double seal. Since the limiting blocks are arranged at intervals, the interval between adjacent limiting blocks provides a accommodating space for the extrusion deformation of the outer annular seal, avoiding the irregular arching of the outer annular seal caused by the force extrusion and resulting in poor sealing effect, and the installation is more convenient, ensuring the effective sealing fit between the outer annular seal and the inner wall of the installation groove and the outer wall of the limiting block, and the overall sealing effect of the annular sealing portion is better.

[0036] The beneficial effects of the present utility model are as follows: 1) By forming a cantilever portion at at least one of the starting ends of the main board corresponding to the first extension portion and the second extension portion, the cantilever portion is a region where the thickness of the main board is reduced, and it extends a certain length both radially and circumferentially. Under the premise of being connected to the main board, the cantilever portion is suspended relative to the main board, so that the stiffness of the cantilever portion is relatively small, and it is prone to deformation under pressure. Therefore, when the first connecting member and / or the second connecting member is connected to the cantilever portion, the first connecting member and / or the second connecting member can also deform synchronously with the deformation of the cantilever portion. Its deformation is more likely to occur and the deformation amplitude is larger, thereby greatly reducing the mutual extrusion force for axially squeezing the two connecting bodies towards each other. The first connecting member of one connecting body contacts the second connecting member of the other cooperating connecting body and generates a mutual extrusion effect. The two can quickly deform, and the deformation amplitude is large. Correspondingly, the first clamping portion of the first connecting member and the second clamping portion of the second connecting member can be quickly clamped and in place; 2) The first region of the cantilever portion is connected to the main board. The first region and the first clamping portion are located on the same side of the first extension portion, that is, the connection point between the cantilever portion and the main board and the first clamping portion are arranged on the same side of the first extension portion. It changes the relative rotation point between the first connecting member and the main board through the cantilever portion, so that the rotation fulcrum, the mutual cooperation force application points between the first connecting member and the second connecting member are located on the same side of the first extension portion. Under the action of the moment, the first extension portion rotates towards the side where the rotation fulcrum is located along with the cantilever portion, that is, the first connecting member rotates towards the direction of clamping more tightly with the second connecting member, making the first clamping portion and the second clamping portion clamped more tightly; 3) The design of the difference between L1 and L2 avoids excessive moment causing damage to the cantilever portion due to excessive deformation. On the basis that the cantilever portion can reduce the external force required for the operation during the clamping and matching process of the first connecting member and the second connecting member, it avoids excessive deformation of the cantilever portion resulting in damage; in addition, the above design reduces the distance between the relative rotation fulcrum of the first connecting member and the main board and the mutual cooperation force application points between the first connecting member and the second connecting member. During the use of the sterile connector as a whole, the moment is reduced, and the rotation amplitude of the first connecting member relative to the rotation fulcrum is smaller. Therefore, the clamping between the first connecting member and the second connecting member is tighter and more stable, avoiding the first connecting member and the second connecting member from separating from each other. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 is a perspective view of the sterile connector provided by the present utility model.

[0038] Figure 2 is a front view of the sterile connector provided by the present utility model.

[0039] Figure 3 is Figure 2 an enlarged view of the structure at A in

[0040] Figure 4 is a perspective view of the connecting body provided by the present utility model.

[0041] Figure 5 The perspective view of the connection body plus the thin film provided by the present utility model.

[0042] Figure 6 The front view of the exploded structure of the connection body and the annular sealing part provided by the present utility model.

[0043] Figure 7 The rear view of the exploded structure of the connection body and the annular sealing part provided by the present utility model.

[0044] Figure 8 The perspective view of the exploded structure of the connection body and the annular sealing part provided by the present utility model.

[0045] Figure 9 The rear view of the connection body provided by the present utility model.

[0046] Figure 10 For Figure 9 The enlarged view of the structure at position B in

[0047] Figure 11 The front view of the connection body provided by the present utility model.

[0048] Figure 12 For Figure 11 The enlarged view of the structure at position C in

[0049] Figure 13 The schematic diagram of the structure of the connection body of another structure provided by the present utility model.

[0050] Figure 14 The perspective view of the connection body plus the protective cover of the sterile connector provided by the present utility model.

[0051] Figure 15 The front view of the connection body plus the protective cover of the sterile connector provided by the present utility model.

[0052] Wherein, 11 - the first connection body, 12 - the second connection body, 2 - the joint, 3 - the main board, 31 - the anti-rotation protrusion, 32 - the anti-rotation recess, 33 - the installation groove, 34 - the limit block, 4 - the flow channel, 5 - the annular sealing part, 51 - the inner annular seal, 52 - the outer annular seal, 61 - the first connecting member, 611 - the first extension part, 612 - the first clamping part, 613 - the first clamping surface, 62 - the second connecting member, 621 - the second extension part, 622 - the second clamping part, 623 - the second clamping surface, 624 - the third clamping surface, 7 - the cantilever part, 71 - the first area, 72 - the second area, 8 - the gap, 9 - the thin film, 91 - the protective cover. Specific embodiments

[0053] To enable those skilled in the art to better understand the solution of the present utility model, the following will clearly and completely describe the technical solutions in the embodiments of the present utility model in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0054] As Figures 1 - 5 shown, a sterile connector includes two connection bodies. Here, the two connection bodies are respectively defined as the first connection body 11 and the second connection body 12. The structures of the two connection bodies can be the same or different, and no specific limitation is made. In this embodiment, the first connection body 11 and the second connection body 12 have the same structure and are collectively referred to as the connection body for specific description.

[0055] The connection body has a joint 2 with a hollow interior forming a flow channel 4, a main board 3 formed at one end of the joint 2, an annular sealing portion 5 surrounding the outer periphery of the opening of the flow channel 4, and a first connecting member 61 and a second connecting member 62 located on the end surface of the main board 3 facing away from the joint 2 and relatively arranged on both sides of the opening of the flow channel 4.

[0056] As Figure 3 、 Figure 7 、 Figure 10 shown, the first connecting member 61 includes a first extension portion 611 with a starting end connected to the main board 3 and a first clamping portion 612 formed at the end of the first extension portion 611. In this embodiment, the number of the first connecting members 61 is two, and its first extension portion 611 is a columnar structure. The two columnar structures are spaced apart and can be symmetrically arranged or asymmetrically arranged. On the opposite side surfaces of the two columnar bodies, a first clamping portion 612 is formed through a protruding structure respectively.

[0057] As Figure 3 、 Figure 6 、 Figure 12 shown, the second connecting member 62 includes a second extension portion 621 with a starting end connected to the main board 3 and a second clamping portion 622 formed at the end of the second extension portion 621. The number of the second connecting members 62 corresponds to the number of the first connecting members 61 and is also two. Its second extension portion 621 is a columnar structure. The two columnar structures are spaced apart and can be symmetrically arranged or asymmetrically arranged. On the opposite side surfaces of the two columnar bodies, a second clamping portion 622 is formed through a protruding structure respectively.

[0058] The first clamping portion 612 of the first connecting member 61 of one connecting body forms a snap connection with the second clamping portion 622 of the second connecting member 62 of the other connecting body to form an integral body, that is, a sterile connector. Specifically, in this embodiment, the first clamping portion 612 of the first connecting member 61 of the first connecting body 11 forms a snap connection with the second clamping portion 622 of the second connecting member 62 of the second connecting body 12; the second clamping portion 622 of the second connecting member 62 of the first connecting body 11 forms a snap connection with the first clamping portion 612 of the first connecting member 61 of the second connecting body 12. Since the first connecting member 61, the second connecting member 62 of the first connecting body 11 and the first connecting member 61, the second connecting member 62 of the second connecting body 12 have the same structure, the following describes the unilateral structure specifically.

[0059] The main board 3 forms a cantilever portion 7 at at least one of the starting ends of the first extension portion 611 and the starting end of the second extension portion 621. The starting end of the first extension portion 611 and / or the starting end of the second extension portion 621 is connected to the cantilever portion 7, and the cantilever portion 7 is disposed suspended relative to the main board 3.

[0060] Specifically, the above refers to the following three situations. In the first situation, the main board 3 forms a cantilever portion 7 corresponding to the starting end of the first extension portion 611, and the starting end of the first extension portion 611 is connected to the cantilever portion 7. At this time, the main board 3 does not form a cantilever portion 7 corresponding to the starting end of the second extension portion 621. In the second situation, the main board 3 forms a cantilever portion 7 corresponding to the starting end of the second extension portion 621, and the starting end of the second extension portion 621 is connected to the cantilever portion 7. At this time, the main board 3 does not form a cantilever portion 7 corresponding to the starting end of the first extension portion 611. In the third situation, the main board 3 forms a cantilever portion 7 corresponding to the starting end of the first extension portion 611. At the same time, the main board 3 also forms a cantilever portion 7 corresponding to the starting end of the second extension portion 621.

[0061] In the above first situation, it further includes that the starting ends of both first extension portions 611 form cantilever portions 7, or only the starting end of one first extension portion 611 forms a cantilever portion 7. In the above second situation, it further includes that the starting ends of both second extension portions 621 form cantilever portions 7, or only the starting end of one second extension portion 621 forms a cantilever portion 7. In the above third situation, it further includes that the starting end of at least one of the two first extension portions 611 forms a cantilever portion 7, and the starting end of at least one of the two second extension portions 621 forms a cantilever portion 7. Generally, the starting ends of both first extension portions 611 form cantilever portions 7; or the starting ends of both second extension portions 621 form cantilever portions 7.

[0062] It should be noted that in this embodiment, the cantilever portion 7 is located in the area where the thickness of the main board 3 is reduced, and extends a certain length both radially and circumferentially. Thus, on the premise that the cantilever portion 7 is connected to the main board 3, the cantilever portion 7 is suspended relative to the main board 3. With such a setting, the stiffness of the cantilever portion 7 is relatively small, and it is prone to deformation under pressure. Therefore, when the first connecting member 61 and / or the second connecting member 62 is connected to the cantilever portion 7, the first connecting member 61 and / or the second connecting member 62 can also deform synchronously with the deformation of the cantilever portion 7. Compared with the prior art, the deformation of the first connecting member 61 and / or the second connecting member 62 is more likely to occur and the deformation amplitude is larger. Thus, the mutual extrusion force between the two connecting bodies axially extruded towards each other can be greatly reduced. When the first connecting member 61 of the first connecting body 11 contacts the second connecting member 62 of the second connecting body 12 that cooperates with it and generates a mutual extrusion effect, the two can quickly deform, and the deformation amplitude is large. Correspondingly, the first engaging portion 612 of the first connecting member 61 and the second engaging portion 622 of the second connecting member 62 can quickly engage and be in place.

[0063] Specifically, in this embodiment, the cantilever portion 7 is formed at the starting end of the main board 3 corresponding to the first extension portion 611. And cantilever portions 7 are provided at the starting ends of the first extension portions 611 of the two first connecting members 61. The axial thickness of the cantilever portion 7 is 20-40% of the axial thickness of the main board 3. Figure 10 Where S1 represents the axial thickness of the cantilever portion 7. Figure 9 Where S represents the axial thickness of the main board 3. Therefore, S1 / S = 20-40%. If the ratio of the two is less than 20%, the cantilever portion 7 is prone to break when rotating under force. If the ratio of the two is greater than 40%, it is difficult for the cantilever portion 7 to deform after being stressed, or the deformation that occurs after being stressed is small, resulting in difficulty in engaging the two connecting members. With such a setting, on the premise of ensuring that the cantilever portion 7 can provide greater deformation and the two connecting members are easy to engage, the cantilever portion 7 is ensured to have sufficient strength to avoid damage during the mutual engagement process of the first connecting member 61 and the second connecting member 62.

[0064] Such as Figure 3 、 Figure 10 As shown, the cantilever portion 7 includes a first region 71 and a second region 72 that are integrally connected. The second region 72 is connected to the starting end of the first extension portion 611. The first region 71 and the first engaging portion 612 are located on the same side of the first extension portion 611. Specifically, as Figure 10 shown, the upper side of the plane where the O2 line is located belongs to the first connecting member 61, and the lower side of the plane where the O2 line is located belongs to the cantilever portion 7. For the lower side part of the plane where the O2 line is located, it is further bounded by the O1 line. The left side of the vertical plane where the O1 line is located belongs to the first region 71, and the right side of the vertical plane where the O1 line is located belongs to the second region 72. The first engaging portion 612 is also located on the left side of the vertical plane where the O1 line is located.

[0065] In other words, in the above structure, the connection point between the cantilever portion 7 and the main board 3, that is, the connection point between the first area 71 and the main board 3, is located on the left side of the vertical plane where the O1 line is located, and the first clamping portion 612 is located on the left side of the first extension portion 611, that is, the connection point between the cantilever portion 7 and the main board 3 and the first clamping portion 612 are on the same side of the first extension portion 611. The connection point between the first area 71 and the main board 3 forms a rotation fulcrum.

[0066] The torque is a physical quantity representing the rotational effect produced when a force acts on an object. The product of the force and the lever arm is the torque of the force on the rotation axis. The torque has directionality. In the prior art, the relative rotation point between the first connecting member 61 and the main board 3 is located at the starting end of the first extension portion 611, away from the first clamping portion 612, and the force point where the first connecting member 61 and the second connecting member 62 cooperate with each other is located on one side of the first clamping portion 612, that is, the rotation fulcrum, the mutual cooperation force point between the first connecting member 61 and the second connecting member 62 are located on different sides of the first extension portion 611. Therefore, under the action of the torque, the first extension portion 611 will rotate toward the side where the rotation fulcrum is located, and the first connecting member 61 will tend to rotate away from the second connecting member 62, that is, rotate toward the side where the first connecting member 61 and the second connecting member 62 are separated from each other, which will cause the clamping between the first connecting member 61 and the second connecting member 62 to be not stable enough, and the two are easy to disengage.

[0067] The first area 71 of the cantilever part 7 of the utility model is connected to the main board 3, and the first area 71 and the first clamping part 612 are located on the same side of the first extension part 611, that is, the connection point between the cantilever part 7 and the main board 3, that is, the rotation fulcrum and the first clamping part 612 are arranged on the same side of the first extension part 611, and the relative rotation point between the first connecting member 61 and the main board 3 is changed by the cantilever part 7, so that the mutual cooperation force points ( Figure 3 It is pointed out in the figure that the mutual cooperation force between the first connecting member 61 and the second connecting member 62 is F) and is located on the same side of the first extension part 611. Under the action of the torque, the first extension part 611 rotates toward the side where the rotation fulcrum is located along with the cantilever part 7, so that the first connecting member 61 rotates in the direction of a tighter clamping with the second connecting member 62, overcoming the shortcomings of the prior art, making the first clamping part 612 and the second clamping part 622 clamped more tightly, and the compressive strength of the two after being connected is higher.

[0068] like Figure 3As shown, the length by which the first region 71 protrudes from the first extension portion 611 is L1. Specifically, the starting end and the terminal end for measuring L1 are respectively the connection portion between the first region 71 of the cantilever portion 7 and the main board 3, and the outer side wall of the first extension portion 611; the maximum distance between the center of the first clamping portion 612 and the side wall of the first extension portion 611 is L2. Specifically, the starting end and the terminal end for measuring L2 are respectively the outer side wall of the first extension portion 611 and the center of the transverse width of the first clamping portion 612. Then, L1 - L2 is equivalent to the length of the force arm, and L1 - L2 ≤ 1 mm. For the same object, the greater the torque, the easier it is to change its rotational state. In order to prevent the cantilever portion 7 from being damaged due to excessive torsional deformation caused by too large a torque, the difference between L1 and L2 is designed to be less than or equal to 1 mm. Thus, on the basis that the cantilever portion 7 can reduce the external force required during the clamping fit between the first connecting member 61 and the second connecting member 62, it is avoided that the cantilever portion 7 undergoes excessive deformation and is damaged; in addition, the above design reduces the distance between the relative rotation fulcrum of the first connecting member 61 and the main board 3 and the force application point of the mutual cooperation between the first connecting member 61 and the second connecting member 62. During the use of the sterile connector as a whole, the torque is reduced, and the amplitude of rotation of the first connecting member 61 relative to the rotation fulcrum is smaller. Thus, the clamping between the first connecting member 61 and the second connecting member 62 is tighter and more stable, and it is also avoided that the first connecting member 61 and the second connecting member 62 are disengaged from each other.

[0069] Of course, the case where L1 - L2 = 0 mm is not excluded. At this time, it is equivalent to a torque of 0, the cantilever portion 7 is not rotated under force, the first clamping portion 612 and the second clamping portion 622 axially pull on each other, and the first clamping portion 612 and the second clamping portion 622 do not disengage from each other.

[0070] As Figure 10 shown, the axial length of the first extension portion 611 is H1. As Figure 12 shown, the axial length of the second extension portion 621 is H2. Then, it satisfies: H1 - H2 = 3 - 4 mm. That is, the axial lengths of the first extension portion 611 and the second extension portion 621 are not the same, and the axial length of the first extension portion 611 is greater than the axial length of the second extension portion 621. With such a setting, the first extension portion 611 is more likely to deform compared to the second extension portion 621. Thus, the first extension portion 611 mainly plays the role of deformation, and the second extension portion 621 is not easily deformed and mainly plays the role of stable clamping. On the basis that the clamping operation between the first connecting member 61 and the second connecting member 62 is labor-saving, the stability of the clamping between the two is ensured, and it is avoided that the clamping is not firm due to the fact that both the first extension portion 611 and the second extension portion 621 are easily deformed. And the difference between H1 and H2 is between 3 - 4 mm, which avoids too large a length difference between the first extension portion 611 and the second extension portion 621, ensures that the two can be effectively clamped, and at the same time ensures the structural stability after the two are clamped.

[0071] In this embodiment, the cantilever portion 7 is perpendicularly connected to the first extension portion 611 or the second extension portion 621, that is, as Figure 9 shown, the cantilever portion 7 extends along the horizontal direction of the end face of the main board 3, and the first extension portion 611 extends along the vertical direction perpendicular to the end face of the main board 3; as Figure 13 shown, the cantilever portion 7 is formed at the starting ends of the two second extension portions 621. At this time, the cantilever portion 7 extends along the horizontal direction of the end face of the main board 3. Similarly, its first region 71 and the second clamping portion 622 are also located on the same side of the second extension portion 621, and the second extension portion 621 extends along the vertical direction perpendicular to the end face of the main board 3. Such a setting makes the mutual cooperation force between the first connecting member 61 and the second connecting member 62 along the direction perpendicular to the end face of the main board 3, as Figure 3 the direction indicated by the force F in, and at this time, there will be no more component forces, ensuring the axial stable connection between the first connecting member 61 and the second connecting member 62. Of course, in some other embodiments, the cantilever portion 7 may not be perpendicular to the first extension portion 611 or the second extension portion 621.

[0072] Based on the perpendicular connection of the first extension portion 611 to the cantilever portion 7, the first clamping portion 612 is a convex block protruding from the outer wall of the first extension portion 611 and corresponding to the cantilever portion 7. The convex block has a first clamping surface 613, and the first clamping surface 613 extends obliquely outward from the side wall of the first extension portion 611 in a direction tending to be close to the end face of the main board 3, and its inclination angle is 3 - 7°, that is, Figure 10 in, the first clamping surface 613 extends obliquely outward and downward from the side wall of the first extension portion 611, and the α angle is 3 - 7°.

[0073] Based on the perpendicular connection of the second extension portion 621 to the cantilever portion 7, as Figure 12 and 13 shown, the second clamping portion 622 includes an axially spaced second clamping surface 623 and a third clamping surface 624. Both the second clamping surface 623 and the third clamping surface 624 can be snap-connected to the first clamping portion 612. The inclination directions of the second clamping surface 623 and the third clamping surface 624 are the same, and the inclination angle of the second clamping surface 623 is less than the inclination angle of the third clamping surface 624. Of course, in some other embodiments, as Figure 12 shown, the second extension portion 621 can be perpendicularly connected to the end face of the main board 3, and specific details are not limited.

[0074] When the first connecting body 11 and the second connecting body 12 are axially butted, that is, when the first engaging portion 612 and the second engaging portion 622 are inserted up and down, first, they slide in cooperation through the first engaging surface 613 and the second engaging surface 623, so that the first engaging portion 612 enters between the second engaging surface 623 and the third engaging surface 624. The first engaging surface 613 and the second engaging surface 623 form an engagement. At this time, the user can pull out the film 9, so that the annular sealing portions 5 of the first connecting body 11 and the second connecting body 12 are abutted to form a preliminary antibacterial seal. The specific working principle is the prior art and will not be elaborated here. Then, continue to press the two connecting bodies, so that the first engaging portion 612 enters the space below the third engaging surface 624 (illustrated by the Figure 3 indicated direction), the first engaging surface 613 and the third engaging surface 624 form an engagement, and the pressure of the annular sealing portions 5 of the first connecting body 11 and the second connecting body 12 being abutted increases, further increasing the antibacterial sealing performance and the liquid sealing performance of the liquid passage.

[0075] The inclination angle of the first engaging surface 613 of the first engaging portion 612 is 3-7°. It is engaged with the third engaging surface 624 of the second engaging portion 622, and the two form a helical tooth engagement structure, making the snap connection between the first connecting member 61 and the second connecting member 62 more stable. Even when the first engaging portion 612 has a tendency to rotate away from the second engaging portion 622, the second engaging portion 622 will not be disengaged from the first engaging portion 612.

[0076] To ensure that the first engaging portion 612 can be smoothly snapped into the space below the second engaging portion 622, and to ensure that the first engaging surface 613 of the first engaging portion 612 and the third engaging surface 624 of the second engaging portion 622 can be in contact and engaged within the maximum range, there is a gap 8 between the end of the first connecting member 61 or the end of the second connecting member 62 and the end face of the corresponding main board 3. That is, as Figure 3 shown, there is a gap 8 between the end of the first connecting member 61 and the end face of the main board 3 of the second connecting body 12. This gap 8 is D in the figure. This gap 8 reserves space for the snap connection of the first connecting member 61 and the second connecting member 62, avoiding interfering with the snap connection between the first engaging portion 612 and the second engaging portion 622. In some other embodiments, it can be that there is the above gap 8 between the end of the second connecting member 62 and the end face of the main board 3 of the first connecting body 11. Specifically, the value of D can be 0.1-0.3 mm.

[0077] As Figure 14 、 Figure 15As shown, when each connecting body leaves the factory, a film 9 covers the end face of the set connecting piece thereof and is connected to a protective cover 91. The connecting body and the protective cover 91 are snap-connected, so that the protective cover 91 plays a role in dust prevention. When it is necessary to butt-connect two connecting bodies to form a sterile connector, the protective covers 91 of the two connecting bodies are respectively removed, and then the two connecting bodies are axially butt-connected and assembled. The specific structure of the protective cover is similar to that disclosed in the prior art and will not be elaborated herein.

[0078] When the first connecting body 11 and the second connecting body 12 are axially butted, in order to facilitate their accurate and rapid alignment and connection, a matching anti-rotation protrusion 31 and anti-rotation recess 32 are provided on the main board 3 of the connecting body. When the two connecting bodies are butted, the anti-rotation protrusion 31 is inserted into the anti-rotation recess 32, so that the two connecting bodies are anti-rotationally matched. Specifically, as Figure 8 shown, the anti-rotation protrusion 31 and the anti-rotation recess 32 are respectively provided on both sides of the first connecting piece 61 of the second connecting body 2, and the anti-rotation protrusion 31 and the anti-rotation recess 32 are respectively provided on both sides of the second connecting piece 62, and the positions of the anti-rotation protrusion 31 and the anti-rotation recess 32 on both sides of the first connecting piece 61 are swapped with their positions on both sides of the second connecting piece 62. In other words, as Figure 8 、 Figure 9 、 Figure 11 shown, when the anti-rotation protrusion 31 is on the left side of the first connecting piece 61 and the anti-rotation recess 32 is on the right side of the first connecting piece 61, in the same line of sight direction, the anti-rotation recess 32 is on the left side of the second connecting piece 62 and the anti-rotation protrusion 31 is on the right side of the second connecting piece 62. When the two connecting bodies are axially butted, the anti-rotation protrusion 31 beside the first connecting piece 61 is inserted into the anti-rotation recess 32 beside the second connecting piece 62, and the anti-rotation protrusion 31 beside the second connecting piece 62 is inserted into the anti-rotation recess 32 beside the first connecting piece 61.

[0079] There is no limitation on the shapes of the anti-rotation protrusion 31 and the anti-rotation recess 32, as long as the anti-rotation protrusion 31 can be vertically inserted into the anti-rotation recess 32. In this embodiment, the cross-sections of the anti-rotation protrusion 31 and the anti-rotation recess 32 are both triangular.

[0080] As mentioned in the above structure, one of the second connecting pieces 62 is integrally connected to the main board 3. Specifically, the second connecting piece 62 is integrally formed with the outer wall of the anti-rotation recess 32, as Figure 6 、 Figure 11 shown, which improves the stiffness of the second connecting piece 62. During the insertion process of the first connecting piece 61 and the second connecting piece 62, the second connecting piece 62 hardly deforms, while the first connecting piece 61 mainly plays the role of deforming. Compared with the situation where both the first connecting piece 61 and the second connecting piece 62 can deform, this structural setting is beneficial to the accurate and rapid formation of a snap connection between the first connecting piece 61 and the second connecting piece 62.

[0081] As shown Figures 6 - 8 in the figure, the annular seal part 5 includes an inner annular seal 51 and an outer annular seal 52. The main board 3 of the connecting body forms an installation groove 33 on the outer periphery of the opening of the flow channel 4. A plurality of limiting blocks 34 are provided on the inner bottom surface of the installation groove 33. The plurality of limiting blocks 34 are arranged at intervals along the circumferential direction of the circle, specifically, they are arranged at intervals along one circle of the outer periphery of the opening of the flow channel 4. The outer annular seal 52 is hermetically clamped between the inner wall of the installation groove 33 and the outer side wall of the limiting block 34, that is, the unilateral radial width of the outer annular seal 52 is equal to or slightly larger than the radial interval between the inner wall of the installation groove 33 and the outer side wall of the limiting block 34. The outer wall of the inner annular seal 51 is hermetically attached to the inner side wall of the limiting block 34, and the inner wall of the inner annular seal 51 surrounds the outer periphery of the opening of the flow channel 4. When the inner annular seal 51 and the outer annular seal 52 are assembled into the installation groove 33, the top surfaces of both slightly protrude from the end surface of the main board 3, and the thickness of the inner annular seal 51 protruding from the end surface of the main board 3 is slightly smaller than the thickness of the outer annular seal 52 protruding from the end surface of the main board 3.

[0082] The above-mentioned inner annular seal 51 and outer annular seal 52 form a double seal. And because the limiting blocks 34 are arranged at intervals, when the outer annular seal 52 deforms under the extrusion of the inner wall of the installation groove 33 and the outer wall of the limiting block 34, the deformation can be absorbed by the interval between adjacent limiting blocks 34, avoiding the irregular arching of the outer annular seal 52 caused by the force extrusion, resulting in poor sealing effect, and ensuring the effective sealing fit between the outer annular seal 52 and the inner wall of the installation groove 33 and the outer wall of the limiting block 34, and the overall sealing effect of the annular seal part 5 is better.

[0083] The above specific embodiments are used to explain and illustrate the present invention, rather than to limit the present invention. Within the spirit and scope of the protection of the claims of the present invention, any modification and change made to the present invention fall within the protection scope of the present invention.

Claims

1. A sterile connector, comprising two connecting bodies: The connecting body comprises a joint with a hollow interior forming a flow channel, a main plate formed at one end of the joint, an annular sealing portion arranged around the outer periphery of the flow channel opening, and a first connecting member and a second connecting member located at an end surface of the main plate away from the joint and arranged oppositely at two sides of the flow channel opening; The first connecting member includes a first extending portion whose starting end is connected to the main board and a first clamping portion formed at the end of the first extending portion; The second connecting member includes a second extending portion whose starting end is connected to the main board and a second clamping portion formed at the end of the second extending portion; The first clamping portion of the first connector of one of the connecting bodies forms a snap connection with the second clamping portion of the second connector of the other connecting body to form an integrated sterile connector; characterized in that: The mainboard forms a cantilever portion at at least one of the starting end of the first extension portion and the starting end of the second extension portion, the starting end of the first extension portion and / or the starting end of the second extension portion are connected to the cantilever portion, and the cantilever portion is suspended relative to the mainboard.

2. The aseptic connector according to claim 1, characterized in that: The cantilever portion includes a first area and a second area that are integrally connected, the second area is connected to the starting end of the first extension portion, and the first area and the first clamping portion are located on the same side of the first extension portion.

3. The sterile connector according to claim 2, characterized in that: The length of the first area protruding from the first extension portion is L1, and the maximum distance between the center of the first clamping portion and the side wall of the first extension portion is L2, then L1-L2≤1mm.

4. The aseptic connector according to claim 2, wherein: The axial length H1 of the first extension portion and the axial length H2 of the second extension portion satisfy: H1-H2=3-4 mm.

5. The aseptic connector according to claim 1, wherein: The axial thickness of the cantilever portion is 20-40% of the axial thickness of the main board.

6. The aseptic connector according to claim 1 or 2, characterized in that: The cantilever portion is vertically connected to the first extension portion or the second extension portion; the first clamping portion is a protrusion protruding from the outer wall of the first extension portion and arranged corresponding to the cantilever portion, and the protrusion has a first clamping surface, which tends to be close to the end face of the mainboard and extends outwardly from the side wall of the first extension portion, and its inclination angle is 3-7°.

7. The sterile connector according to claim 1, characterized in that: The second clamping portion includes a second clamping surface and a third clamping surface axially separated, and the second clamping surface and the third clamping surface can be snap-connected with the first clamping portion, the second clamping surface and the third clamping surface have the same inclination direction, and the inclination angle of the second clamping surface is smaller than the inclination angle of the third clamping surface.

8. The aseptic connector according to claim 1, characterized in that: When the two connection bodies are axially butted against each other, there is a gap between the end of the first connection piece or the end of the second connection piece and the corresponding end surface of the main board.

9. The aseptic connector according to claim 1, wherein: The main board of the connection body is provided with matching anti-rotation protrusions and anti-rotation recesses. When the two connection bodies are butt-jointed, the anti-rotation protrusions are inserted into the anti-rotation recesses to make the two connection bodies anti-rotationally matched.

10. The aseptic connector according to claim 9, characterized in that: The anti-rotation protrusions and anti-rotation recesses are respectively arranged on both sides of the first connecting member and both sides of the second connecting member, and the positions of the anti-rotation protrusions and anti-rotation recesses on both sides of the first connecting member are swapped with their positions on both sides of the second connecting member.

11. The aseptic connector according to claim 1, wherein: The annular sealing portion includes an inner annular seal and an outer annular seal. The main board of the connecting body forms an installation groove on the outer periphery of the flow channel opening. A plurality of limiting blocks are provided on the inner bottom surface of the installation groove, and the plurality of limiting blocks are arranged at intervals along the circumferential direction of the circle. The outer annular seal is hermetically clamped between the inner wall of the installation groove and the outer side wall of the limiting block, the outer wall of the inner annular seal is hermetically attached to the inner side wall of the limiting block, and the inner wall of the inner annular seal surrounds the outer periphery of the flow channel opening.

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