A fluid connector

Abstract

The application discloses a fluid connector, which comprises a female head body, a male head, a valve and a button, and the button is located at two sides of the male head in the pressing direction of the button; one side is provided with a first clamping tooth and a second clamping tooth, and the other side is provided with a third clamping tooth; the first clamping tooth, the third clamping tooth and the second clamping tooth are sequentially arranged along a first direction; the first direction is the withdrawal direction of the male head relative to the female head body; a boss is arranged on the male head and can be sequentially stopped at a first position, a second position and a third position along the first direction relative to the female head body. After the male head moves from the first position to the second position, the complete butt joint connection relationship is no longer present, the buffering effect can be achieved, the internal fluid change is more stable through buffering, and pressure relief can be achieved to reduce the probability that the male head is directly flushed out when the male head and the female head body are unlocked; in summary, the fluid connector can improve the problem that the connection effect of the male head and the female head body of the existing button type quick connector is poor.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of connectors, and more particularly to a fluid connector. BACKGROUND

[0002] The existing button type quick connector (fluid connector) is mainly used for quick connection between pipelines. Since the button type quick connector can control connection and disconnection with the external conducting pipe through the button lock thereon, it has the advantages of simple operation and rapid disassembly and assembly, and is widely used in pressure detection of pneumatic systems and hydraulic systems.

[0003] In the process of implementing the present application, the inventors have found that at least the following problems exist in the prior art:

[0004] First, the button function is single and has poor selectivity. In the conventional design, the button has only one hanging tooth and can be pressed only once, which only plays a role of disconnecting the connection. However, in actual use, there may be various requirements, such as the need to disconnect the male and female head bodies without separation, or the need to have a selectable insertion depth to adjust the fluid flow rate, or even the need to have an adjustable fluid inlet to achieve the effect of switching the passage without disconnecting.

[0005] Second, the stability is poor. In the pressure detection process, the button type quick connector is plugged and unplugged under pressure. When the button is pressed, the male head and the female head body are unlocked, and the male head will be directly pushed out by the gas pressure. First, there is a safety hazard. Second, if the male head is damaged by collision during the ejection process, air leakage or even distorted pressure values may occur during subsequent pressure measurement, which cannot be tolerated in the detection process.

[0006] In summary, how to effectively solve the problem of poor connection effect of the male head and the female head body of the existing button type quick connector is a problem that needs to be solved by the technical personnel in the field at present. SUMMARY

[0007] Therefore, the purpose of the present application is to provide a fluid connector which can improve the problem of poor connection effect of the male head and the female head body of the existing button type quick connector.

[0008] In order to achieve the above purpose, the present application provides the following technical solutions:

[0009] A fluid connector comprises a female head body, a male head, a valve and a button, which is located at two sides of the male head in the pressing direction of the button: one side is provided with a first latch, a second latch, and the other side is provided with a third latch; the first latch, the third latch and the second latch are sequentially arranged in a first direction, which is the withdrawal direction of the male head relative to the female head body; the male head is provided with a boss, and can sequentially stop at a first position, a second position and a third position in the first direction relative to the female head body;

[0010] When the male head moves to the first position, the valve moves to the fully open valve port of the female head body, and when the button is in the initial position, the first latch abuts against the boss;

[0011] When the male head moves to the second position, the valve moves to the half-open valve port, and when the button is in the pressed position, the third latch abuts against the boss;

[0012] When the male head moves to the third position, the valve moves to the fully closed valve port, and the gas in the female head body and the gas in the male head are discharged through the pressure relief channel, and when the button is in the initial position, the second latch abuts against the boss.

[0013] In the above fluid connector, when the male head moves to the first position, the valve moves to the fully open valve port of the female head body, and when the male head moves to the third position, the valve moves to the fully closed valve port, and a second position is further provided between the first position and the third position, and when the valve moves to the half-open valve port at the second position, the opening degree of the valve port is at least significantly lower than that of the fully open valve port, thus having better selectivity. In addition, after the male head moves from the first position to the second position, it is no longer in a complete butt joint connection relationship, which can play a buffering effect to avoid the male head directly moving from the first position to the third position, the male head accelerating too much, causing excessive force on the latch and the boss, thereby effectively protecting the latch and the boss. At the same time, through buffering, the internal fluid changes more stably, and can be discharged to reduce the probability of the male head being directly flushed out when the male head and the female head body are unlocked. In summary, the fluid connector can improve the problem of poor connection effect of the male head and the female head body of the existing button type quick connector.

[0014] In some technical solutions, the female head body is provided with a mounting cavity for mounting the button, one side of the mounting cavity is formed with an opening to expose the button, and a gap channel is formed between the opening and the button to serve as an outlet section of the pressure relief channel.

[0015] In some embodiments, when the male head moves to the third position, the first elastic member between the female head body and the valve piece is in a pre-compressed state to generate a pushing force on the male head, and the valve piece can move in the first direction and keep the valve port of the female head body fully closed.

[0016] In some embodiments, the valve piece is a valve rod provided with an axial channel; a first column part of the valve rod towards a second direction closes an end of the axial channel towards the second direction, and closes the valve port when the first column part moves into the cylindrical valve port in the first direction; the second direction is the insertion direction of the male head relative to the female head body; and a through hole leading to the axial channel is provided at a side of the first column part of the valve rod towards the first direction, so that when the first column part moves in the second direction to separate from the valve port, the through hole leads to a cavity of the female head body on the side of the valve port towards the second direction.

[0017] In some embodiments, a column part of the male head towards the second direction cooperates with a middle cylindrical hole of the female head body, so that when the male head moves to the first position and the second position, the column part of the male head is located in the middle cylindrical hole and sealingly connected.

[0018] In some embodiments, a second column part of the valve rod towards the first direction cooperates with the middle cylindrical hole, so that when the male head moves to the third position in the first direction, the second column part can move into the middle cylindrical hole in the first direction and sealingly connected.

[0019] In some embodiments, a radial gap is formed at the abutting position of the valve rod and the male head, so that when the male head moves to the third position, the radial gap communicates with the installation cavity.

[0020] In some embodiments, the female head body comprises a valve seat and a cavity piece; the valve seat is sequentially provided with a first cavity, the valve port and a second cavity in the first direction; the cavity piece is sequentially provided with a groove cavity, the middle cylindrical hole and the installation cavity in the first direction; an end of the valve seat towards the first direction extends into the groove cavity and is threadedly connected; the first elastic member is provided in the second cavity and sleeved on the valve rod; after the male head moves in the first direction to separate from the third position, the first elastic member can push the shoulder of the valve rod to abut to the groove bottom of the groove cavity in the first direction; one end of the first elastic member abuts to the shoulder, and the other end abuts to the valve port.

[0021] In some embodiments, the opening is not smaller than the button so that the button can be loaded into the mounting cavity from the opening, and a second elastic member is arranged on a side cavity wall of the mounting cavity away from the opening to push the button back to the initial position from the pressing position.

[0022] In some embodiments, a connecting pin is further arranged to limit the movement of the button to the pressing position or the initial position. BRIEF DESCRIPTION OF DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed in the following embodiment or prior art description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative effort.

[0024] Figure 1 A structural schematic diagram of the fluid connector when the valve port is fully open is provided for the embodiments of the present application;

[0025] Figure 2 A structural schematic diagram of the fluid connector when the valve port is half open is provided for the embodiments of the present application;

[0026] Figure 3 A structural schematic diagram of the fluid connector when the valve port is fully closed and the male head is in the third position is provided for the embodiments of the present application;

[0027] Figure 4 A structural schematic diagram of the fluid connector when the male head is detached is provided for the embodiments of the present application.

[0028] The signs in the drawings are as follows:

[0029] The female head body 1, the male head 2, the valve 3, the button 4, the first elastic member 5, the second elastic member 6;

[0030] The valve seat 1-1, the cavity member 1-2;

[0031] The boss 2-1;

[0032] The axial channel 3-1, the through hole 3-2;

[0033] The first clamping tooth 4-1, the second clamping tooth 4-2, the third clamping tooth 4-3. DETAILED DESCRIPTION

[0034] The embodiments of the present application disclose a fluid connector which can improve the poor connection effect of the male head and the female head body of the fluid connector.

[0035] With reference to the drawings of the embodiments of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described, obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of the present application.

[0036] Please refer to Figures 1-4 , Figure 1 The structural schematic diagram of the fluid connector when the valve port is fully open is provided for the embodiments of the present application; Figure 2 The structural schematic diagram of the fluid connector when the valve port is half open is provided for the embodiments of the present application; Figure 3 The structural schematic diagram of the fluid connector when the valve port is fully closed and the male head is located at the third position is provided for the embodiments of the present application; Figure 4 The structural schematic diagram of the fluid connector when the male head is detached is provided for the embodiments of the present application.

[0037] In some embodiments, a fluid connector, which can be specifically referred to as a fluid connector with double secondary buttons, is provided. Specifically, the fluid connector mainly comprises a female head body 1, a male head 2, a valve 3 and a button 4. Wherein the button 4 mainly limits the relative movement of the male head 2 and the female head body 1 when the male head 2 opens the valve 3 to complete the butt joint connection with the female head body 1, so as to maintain the butt joint state. Generally, the male head 2 and the female head body 1 are in a constraint relationship of sliding connection through holes, columns and the like, while in the vertical direction of the sliding direction of the male head 2, the button 4 and the female head body 1 form a sliding connection relationship, mainly the button 4 and the female head body 1 are relatively fixed in the sliding direction of the male head 2. While the button 4 can move back and forth between the initial position and the pressed position, so that the corresponding teeth and the corresponding boss 2-1 on the male head 2 enter or leave the abutting relationship along the sliding direction.

[0038] It can be understood that the fluid connector has a male head 2 and a female head, the female head has a female head body 1, a valve 3 and a button 4, the female head body 1 is the main structure of the female head, the valve 3 and the button 4 are respectively assembled in the female head body 1, the male head 2 can be inserted into the female head body 1, the valve 3 can move in the female head body 1 to control the conduction or cutoff of the female head body 1 and the male head 2, and the button 4 can lock the female head body 1 and the male head 2.

[0039] Specifically, the male head 2 can be inserted into the female head body 1 along the second direction to open the valve 3 to complete the butt joint connection with the female head body 1; in addition, the male head 2 can move out of the female head body 1 along the first direction to complete the detachment with the female head body 1. It can be understood that the second direction can refer to the insertion direction of the male head 2 relative to the female head body 1, and the first direction can refer to the withdrawal direction of the male head 2 relative to the female head body 1.

[0040] In the present application, for the convenience of description, the male head 2 moves forward to make the male head 2 and the female head body 1 into the docking connection relationship, and the male head 2 moves backward to make the male head 2 and the female head body 1 out of the docking connection relationship and disassembly. It can be understood that the forward movement of the male head 2 can refer to the movement of the male head 2 in the second direction, and the backward movement of the male head 2 can refer to the movement of the male head 2 in the first direction.

[0041] In some embodiments, the cooperation between the catch of the button 4 and the boss 2-1 of the male head 2 can make the male head 2 stay in the first position and the third position relative to the female head body 1. When the male head 2 is in the first position, the male head 2 and the female head body 1 enter the docking connection relationship, and for the convenience of description, the docking connection relationship of the first position mainly refers to that the valve port is in the fully open state or close to the fully open state, at this time the valve 3 has reached or approached the maximum opening limit. When in the third position, the valve port is in the closed state, that is, the male head 2 and the female head body 1 are out of the docking connection relationship, but the male head 2 is still limited by the button 4 and cannot be separated from the female head body 1, and the cavity between the male head 2 and the female head body 1 is connected with the pressure relief channel, so that the high-pressure gas between them can be relieved until the relief is completed. At this time, by operating the button 4, the male head 2 can be disassembled from the female head body 1. In the above scheme, it is mainly completed by two catches and one boss 2-1, or it can be completed by one boss 2-1 and two catches.

[0042] In some embodiments, a second position is preferably provided between the first position and the third position, and when in the second position, the valve 3 moves to the valve port half open, at this time the opening degree of the valve port is at least significantly lower than that of the fully open valve port. That is, after the male head 2 moves from the first position to the second position, it is no longer a complete docking connection relationship, so as to play a buffering effect. Avoiding directly moving from the first position to the third position, the male head 2 accelerates too much, causing the catch and the boss 2-1 to bear too much force, thereby effectively protecting the catch and the boss 2-1, and through buffering, the internal fluid changes more stably, protecting the necessary equipment and prolonging the service life. Specifically, staying in the first position, the second position and the third position can be achieved by one catch and three bosses 2-1, or by other means.

[0043] In some embodiments, the button 4 can be provided with three catches, and the male head 2 can be provided with one or more bosses 2-1, and the boss 2-1 can adopt a ring-shaped boss 2-1.

[0044] Specifically, in the pressing direction of the button 4, the button 4 is located at two sides of the male head 2: one side is provided with two or more than two teeth, that is, at least including the first tooth 4-1 and the second tooth 4-2; the other side is provided with one or more than one tooth, that is, at least including a third tooth 4-3. The male head 2 has a boss 2-1 at both sides in the pressing direction of the button 4, that is, both sides are provided with a ring boss 2-1, so that both sides have the boss 2-1, and the boss 2-1 on one side of the two sides of the male head 2 in the pressing direction of the button 4 corresponds to the first tooth 4-1 and the second tooth 4-2, so as to work in cooperation to prevent the male head 2 from moving backward; and the boss 2-1 on the other side corresponds to the third tooth 4-3, so as to work in cooperation to prevent the male head 2 from moving backward.

[0045] Wherein the first tooth 4-1, the third tooth 4-3 and the second tooth 4-2 are arranged in sequence backward (i.e. along the first direction), and the corresponding male head 2 is provided with a boss 2-1, so that the male head 2 can be stopped in sequence at the first position, the second position and the third position backward (i.e. along the first direction) relative to the female head body 1, and only when the position of the corresponding change button 4 is changed, the male head 2 can continue to move backward (i.e. along the first direction) from the current stop state.

[0046] Specifically, as shown in Figure 1 When the male head 2 moves to the first position, the elastic force of the first elastic member 5 can be overcome to push open the valve member 3, so that the valve member 3 moves to the fully open valve port of the female head body 1. At this time, if the button 4 is located at the initial position, the first tooth 4-1 abuts against the boss 2-1 of the male head 2, specifically, the front limiting surface of the first tooth 4-1 abuts against the boss 2-1 of the male head 2, so as to prevent the boss 2-1 from retreating, and further prevent the male head 2 from retreating, so that the male head 2 remains at the first position. When the button 4 moves to the pressing position, the first tooth 4-1 is disengaged from the boss 2-1 at this time, so that under the action of the first elastic member 5, the male head 2 can be pushed backward (i.e. along the first direction) to move away from the current first position.

[0047] As shown in the accompanying Figure 2As shown, when the male connector 2 moves to the second position, the valve 3 moves to the half-open position. At this point, it still needs to abut against the valve to maintain the half-open position. It should be noted that the male connector 2 moving to the second position can be achieved either by moving backward (i.e., along the first direction) from the first position under the action of the first elastic element 5, or by moving forward (i.e., along the second direction) from the third position against the first elastic element 5 under external force to enter the second position. When the button 4 is in the pressed position, the third locking tooth 4-3 abuts against the boss 2-1 of the male connector 2. Specifically, the front limiting surface of the third locking tooth 4-3 abuts against the boss 2-1 from front to back to prevent the boss 2-1 from retracting, thereby preventing the male connector 2 from retracting and keeping the male connector 2 in the second position. When the male head 2 is in the first position, the button 4 is in the initial position, and the male head 2 is limited by the first locking tooth 4-1 to maintain the first position. Then, when the button 4 is pressed, the button 4 is disengaged from the initial position and enters the pressed position. At this time, because the first locking tooth 4-1 is disengaged, the male head 2 moves backward (i.e., along the first direction). Because the button 4 enters the pressed position, the third locking tooth 4-3 limits the movement of the male head 2 backward (i.e., along the first direction) to the second position. Because of the limitation of the third locking tooth 4-3, the male head 2 remains in the second position.

[0048] As attached Figure 3 As shown, when the male connector 2 moves to the third position, the valve 3 moves to fully close the valve port, allowing the gas in the female connector body 1 and the male connector 2 to flow out through the pressure relief channel, thus completing the pressure relief. When the button 4 is in the initial position, the second locking tooth 4-2 abuts against the boss 2-1 of the male connector 2. Specifically, the front limiting surface of the second locking tooth 4-2 abuts against the boss 2-1 front and back to prevent the boss 2-1 from moving backward, thereby preventing the male connector 2 from moving backward, so that the male connector 2 remains in the third position. The male connector 2 can move backward (i.e., along the first direction) from the second position to the third position, or it can move forward (i.e., along the second direction) to the first position. When the male head 2 is in the second position, the button 4 is in the pressed position, and the male head 2 is limited by the third locking tooth 4-3 to maintain the second position. Then, the button 4 is released, so that the button 4 is disengaged from the pressed position and enters the initial position under the action of the second elastic member 6. At this time, the third locking tooth 4-3 is disengaged, and the male head 2 moves backward (i.e., along the first direction). Since the button 4 enters the initial position, the second locking tooth 4-2 is limited, so that the male head 2 moves backward (i.e., along the first direction) to the third position. Because of the limitation of the second locking tooth 4-2, it remains in the third position.

[0049] In the fluid connector, when the male head 2 moves to the first position, the valve member 3 moves to the fully open state of the valve port of the female head body 1, when the male head 2 moves to the third position, the valve member 3 moves to the fully closed state of the valve port, and a second position is further provided between the first position and the third position, and when the male head 2 is in the second position, the valve member 3 moves to the half-open state of the valve port, that is, the opening degree of the valve port is at least significantly lower than that of the fully open state, so that better selectivity is achieved. In addition, after the male head 2 moves from the first position to the second position, it is no longer in a complete docking connection relationship, which can play a buffering effect to avoid the male head 2 from directly moving from the first position to the third position, so that the acceleration of the male head 2 is not too large, thereby effectively protecting the teeth and the boss 2-1, and through buffering, the internal fluid changes more stably, and pressure relief can be achieved to reduce the probability of the male head 2 being directly ejected when the male head 2 and the female head body 1 are unlocked. Furthermore, by providing three teeth and one boss 2-1, the above-mentioned three position changes can be achieved, the structure is simple, and the setting is convenient. Because the boss 2-1 is annular and the teeth can be provided in a toothed shape, the boss 2-1 has higher strength, so the boss 2-1 is abutted more times than the teeth, which can improve the overall service life. At the same time, the male head 2 can be rotated to change different abutment positions, thereby further improving the service life. In summary, the fluid connector can improve the poor connection effect of the male head 2 and the female head body 1 of the existing button type quick connector.

[0050] In some embodiments, when the male head 2 moves to the third position, pressure relief needs to be performed through the pressure relief channel. Generally, the pressure relief channel is separately provided, but this will result in an increase in the structure. When the button 4 is installed on the female head body 1, the female head body 1 needs to have an installation cavity for installing the button 4, and an opening is formed on one side of the installation cavity to expose the button 4. At this time, a gap channel can be formed between the opening and the button 4 to serve as an outlet section of the pressure relief channel, so that the outlet does not need to be separately provided. The gap channel can be formed through the gap between the two, or a groove can be formed on the side wall of the opening or the side wall of the button 4 to form the gap channel. It should be noted that part of the cavity of the installation cavity can be connected to the gap channel and the cavity between the male head 2 and the female head body 1. Specifically, when the male head 2 moves to the third position, the male head 2 can move into the installation cavity, or the internal channel is connected to the installation cavity through the gap between the male head 2 and the female head body 1, so as to achieve the above-mentioned connection relationship.

[0051] In some embodiments, when the male head 2 is in the first position and the second position, the first elastic member 5 is in an elastic deformation state (elastic compression state or elastic elongation state) and forms a closing direction pushing force on the valve member 3, so that when the male head 2 is in the first position, the male head 2 can be pushed into the second position, and when the male head 2 is in the second position, the male head 2 can be pushed into the third position.

[0052] In the third position, the first elastic member 5 can no longer form a pushing force on the male head 2 through the valve member 3, which facilitates the design, because the valve port has been closed at this time. However, considering that in the third position, the second clamping tooth 4-2 stops limiting, the male head 2 needs to continue to move backward (i.e., in the first direction) to be detached, but after pressure relief, the male head 2 cannot move backward to push out of the third position without external force, which leads to the need for external force to continue to move the male head 2 backward when the button 4 moves from the initial position to the pressed position.

[0053] In some embodiments, the first elastic member 5 between the female head body 1 and the valve member 3 can be pre-compressed to form a pushing force on the male head 2 when the male head 2 is moved to the third position, so that when the button 4 is moved from the initial position to the pressed position, the male head 2 is moved backward (i.e., in the first direction) due to the pushing force of the first elastic member 5, thereby facilitating the disassembly of the male head 2. It should be noted that when the male head 2 is in the third position, the valve member 3 closes the valve port, and the male head 2 is kept in the current position due to the abutting force. At this time, the valve member 3 can move backward (i.e., in the first direction) by a distance and keep the valve port of the female head body 1 fully closed, so that when the male head 2 moves backward (i.e., in the first direction) from the third position, the valve member 3 moves backward (i.e., in the first direction) by a distance and then no longer moves backward, at which time it can be separated from the abutment of the male head 2. It should be noted that after the valve member 3 moves backward by a distance, the limiting portion can abut to prevent the valve member 3 from continuing to move backward, and at this time the first elastic member 5 is preferably still in a compressed state to ensure compact internal structure. Of course, after the valve member 3 moves backward by a distance, the first elastic member 5 is in a natural extension and contraction state.

[0054] In some embodiments, the valve member 3 can be a valve or a valve rod, wherein the valve is generally used to directly close the valve port, and the valve rod is mainly used to form a communication relationship through the channel inside itself. Specifically, the valve member 3 can be a valve rod to facilitate a certain movement space in the forward and backward directions in the closed state. For how the valve rod communicates the channel and closes the channel, reference can be made to the existing technology, such as the valve member 3 of a reversing valve.

[0055] Specifically, the valve rod is preferably provided with an axial channel 3-1 that penetrates in the axial direction, so as to facilitate the communication relationship between the axial channel 3-1 and the middle channel of the male head 2 when the male head 2 is connected to the end of the valve rod in the second direction.

[0056] Specifically, the front end column of the valve stem (i.e., the first column of the valve stem facing the second direction) can be configured to close the front end of the axial channel 3-1 (i.e., the end of the axial channel 3-1 facing the second direction), and close the valve port when the front end column of the valve stem (i.e., the first column) enters the cylindrical valve port backward (i.e., along the first direction), so that the valve port is in a full closed state. Specifically, to ensure sealing effect, the front end column (i.e., the first column) can be provided with a sealing ring, so that the sealing ring seals between each other when the front end column of the valve stem (i.e., the first column) enters the cylindrical valve port.

[0057] And the front end column of the valve stem (i.e., the first column) is provided with a through hole 3-2 leading to the axial channel 3-1 at the side of the rear side of the front end column of the valve stem (i.e., the side of the first column of the valve stem facing the first direction), so that the through hole 3-2 is in the cavity of the female head body 1 located in front of the valve port (i.e., the side of the valve port facing the second direction) and leads when the front end column of the valve stem (i.e., the first column) moves forward (i.e., along the second direction) to separate from the valve port. When the front end column enters the cylindrical valve port backward (i.e., the first column along the first direction), the through hole 3-2 cannot communicate with the cavity in front of the valve port at this time, thereby realizing full closing. Generally, the through hole 3-2 is completely located in front of the valve port, and at this time the valve port is fully open; and half of the through hole 3-2 is located in front of the valve port and the other half enters the valve port, and at this time the valve port can be considered to be half open.

[0058] Through the above arrangement, the front end column of the valve stem (i.e., the first column) can continue to move after entering the valve port, because the cylindrical valve port is in an axial extension relationship, so that the valve stem can continue to move backward (i.e., along the first direction) after closing the valve port.

[0059] In some embodiments, the male head 2 and the valve stem abut, and the axial channel 3-1 in the valve stem is communicated, specifically, the communication relationship can refer to the above embodiments. After the male head 2 and the valve stem are connected, the central hole of the male head 2 is directly communicated with the axial channel 3-1, or the communication is realized by means of the internal cavity of the female head body 1. When directly communicated, the abutting part of the male head 2 and the valve stem can be abutted by a sealing ring.

[0060] However, considering that the force transmission of the sealing ring is relatively inconvenient, the front end column of the male head 2 (the column part facing the second direction) is preferably matched with the middle cylindrical hole of the female head body 1, so that after the front end column of the male head 2 (i.e., the column part of the male head 2 facing the second direction) is inserted into the middle cylindrical hole, the communication of the hole in the male head 2 with the outside is blocked. Specifically, a sealing ring can be provided to seal the gap between the front end column of the male head 2 (the column part facing the second direction) and the middle cylindrical hole. Specifically, a sealing ring can be provided on the middle cylindrical hole or the front end column of the male head 2 (the column part facing the second direction). When the male head 2 moves to the first position and the second position, the front end column of the male head 2 (the column part facing the second direction) is located in the middle cylindrical hole and sealingly engages, so that the cavity between the valve port and the middle cylindrical hole of the female head body 1 forms a sealed cavity. At this point, the hole in the male head 2 and the axial channel 3-1 are connected to ensure the sealing of the connection. It should be noted that when the male head 2 moves to the third position, at this time, the front end column of the male head 2 (the column part facing the second direction) can move backward (i.e., along the first direction) to disengage from the middle cylindrical hole; or the front end column of the male head 2 moves backward but is still located in the middle cylindrical hole and no longer sealingly contacts the middle cylindrical hole.

[0061] In some embodiments, the rear end column of the valve stem (i.e., the second column part of the valve stem facing the first direction) can be matched with the middle cylindrical hole, so that when the male head 2 moves backward (i.e., along the first direction) to the third position, the rear end column of the valve stem (the second column part) can correspondingly move backward (i.e., along the first direction) into the middle cylindrical hole and sealingly engage, so that the cavity between the valve port and the middle cylindrical hole of the female head body 1 is protected, while avoiding the attachment of dust and the like to the inner wall of the middle cylindrical hole later, which affects the sealing effect.

[0062] In some embodiments, a radial gap can be formed at the abutment between the valve stem and the male head 2; so that when the male head 2 moves to the third position, the radial gap communicates with the mounting cavity. At this time, the front end column of the male head 2 (i.e., the column part of the male head 2 facing the second direction) is located in the middle cylindrical hole, and the middle cylindrical hole and the male head 2 are no longer sealed by the sealing ring, so a ventilation gap is formed to communicate with the mounting cavity. Specifically, a groove can be formed in the hole wall of the middle cylindrical hole to accommodate the sealing ring. When the male head 2 moves to the third position, the front end column of the male head 2 exits the sealing ring, and the rear end of the valve stem (i.e., the second column part) enters the sealing ring. Because the diameter of the middle cylindrical hole is larger than the diameter of the front end column of the male head 2, a gap is formed between them, which extends from the front end of the male head 2 (i.e., the end of the male head 2 facing the second direction) to the mounting cavity to complete the communication.

[0063] In some embodiments, the female head body 1 can be in one piece, for the convenience of connection, the female head body 1 here preferably comprises a valve seat 1-1 and a cavity piece 1-2, wherein the valve seat 1-1 is sequentially provided with a first cavity, a valve port and a second cavity along a first direction, and wherein the cavity piece 1-2 is sequentially provided with a groove cavity, a middle cylindrical hole and a mounting cavity along the first direction. The rear end of the valve seat 1-1 (the end of the valve seat facing the first direction) extends into the groove cavity and is threadedly connected therebetween, and is preferably sealed by a sealing ring. Specifically, the valve seat 1-1 can be made to abut the groove bottom of the groove cavity through the sealing ring. The second cavity therein can be provided with a first elastic member 5 sleeved on the valve rod, so that the first elastic member 5 can be installed.

[0064] After the male head 2 is moved backward (i.e. along the first direction) to disengage from the third position, the first elastic member 5 can push the shoulder of the valve rod backward (i.e. along the first direction) to abut the groove bottom of the groove cavity; and the first elastic member 5 abuts one end of the shoulder and the other end of the valve port. During installation, the valve member 3 sleeved with the first elastic member 5 can be first installed into the second cavity, and then the connection between the valve seat 1-1 and the cavity piece 1-2 can be performed.

[0065] In some embodiments, the opening can be no smaller than the button 4 so that the button 4 can be installed into the mounting cavity from the opening, and the side cavity wall of the mounting cavity away from the opening is provided with a second elastic member 6 for pushing the button 4 to reset from the pressed position to the initial position. The button 4 forms a through hole for the male head 2 to pass through, and the side of the through hole away from the opening has a first clamping tooth 4-1 and a second clamping tooth 4-2, and the side close to the opening is provided with a third clamping tooth 4-3. During installation, the button 4 can be placed into the mounting cavity from the opening, and then the male head 2 can be passed through.

[0066] In some embodiments, a connecting pin can be further included for limiting the button 4 entering the pressed position or the initial position to prevent the button 4 from continuing to move. Specifically, the connecting pin can be relatively fixed to the female head body 1, and the button 4 has a limiting slot hole matched with the connecting pin, so that when the male head 2 exits, the connecting pin prevents the button 4 from disengaging from the opening. During installation, the button 4 can be installed first, and then the connecting pin can be installed, which is insertedly connected or threadedly connected to the female head body 1. The limiting slot hole can be in a long strip shape in the extension direction, so that the connecting pin does not interfere with the movement of the button 4 between the initial position and the pressed position.

[0067] The various embodiments in the specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0068] The foregoing description of the disclosed embodiments enables a person skilled in the art to make or use the application. Modifications of these embodiments will occur to persons of skill in the art, and that the appended claims are intended to cover all such modifications that do not depart from the true spirit and scope of the application. Therefore, the application is not limited to the embodiments shown but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A fluid connector comprising a female body, a male head, a valve member and a button, characterised in that, The button is located at two sides of the male head in the pressing direction of the button: one side is provided with a first tooth, a second tooth, and the other side is provided with a third tooth; the first tooth, the third tooth and the second tooth are sequentially arranged along a first direction, the first direction being the withdrawal direction of the male head relative to the female head body; the male head is provided with a boss and can be sequentially stopped at a first position, a second position and a third position along the first direction relative to the female head body; When the male head moves to the first position, the valve moves to the fully open valve port of the female head body, and when the button is in the initial position, the first tooth abuts against the boss; When the male head moves to the second position, the valve moves to the half-open valve port, and when the button is in the pressing position, the third tooth abuts against the boss; When the male head moves to the third position, the valve moves to the fully closed valve port, the gas in the female head body and the gas in the male head are discharged through the pressure relief channel, and when the button is in the initial position, the second tooth abuts against the boss; The valve is a valve rod, and the valve rod is provided with an axial channel; a first column portion of the valve rod facing a second direction closes one end of the axial channel facing the second direction, and when the first column portion enters the cylindrical valve port along the first direction, the valve port is closed, and the second direction is the insertion direction of the male head relative to the female head body; and a through hole is provided on the side of the first column portion of the valve rod facing the first direction, which leads to the axial channel, so that when the first column portion moves along the second direction to separate from the valve port, the through hole is located in the cavity on the side of the valve port facing the second direction of the female head body and leads to the cavity.

2. The fluid connector of claim 1, wherein, The female head body is provided with a mounting cavity for mounting the button, one side of the mounting cavity is formed with an opening to expose the button, and a gap channel is formed between the opening and the button to serve as an outlet section of the pressure relief channel.

3. The fluid connector of claim 2, wherein, When the male head moves to the third position, the first elastic member between the female head body and the valve is in a pre-compressed state to form a thrust force on the male head, and the valve can move along the first direction and keep the valve port of the female head body fully closed; It also includes a connecting pin which is connected to the female head body by insertion or screwing, and the button has a limiting slot hole matched with the connecting pin, which is in the shape of a long strip in the extension direction.

4. The fluid connector of claim 3, wherein, The column portion of the male head facing the second direction cooperates with the middle cylindrical hole of the female head body, so that when the male head moves to the first position and the second position, the column portion of the male head is located in the middle cylindrical hole and sealingly engages.

5. The fluid connector of claim 4, wherein, The second column portion of the valve rod facing the first direction cooperates with the middle cylindrical hole, so that when the male head moves to the third position along the first direction, the second column portion can move into the middle cylindrical hole along the first direction and sealingly engage.

6. The fluid connector of claim 5, wherein, The valve stem and the male head abut to form a radial gap; when the male head moves to the third position, the radial gap communicates with the installation cavity.

7. The fluid connector of claim 6, wherein, The female head body comprises a valve seat and a cavity piece, the valve seat is sequentially provided with a first cavity, the valve port and a second cavity along the first direction, the cavity piece is sequentially provided with a groove cavity, the middle cylindrical hole and the installation cavity along the first direction; an end of the valve seat towards the first direction extends into the groove cavity and is threadedly connected therebetween, the second cavity is provided with the first elastic piece sleeved on the valve stem; after the male head moves along the first direction to be separated from the third position, the first elastic piece can push the shoulder of the valve stem to abut to the groove bottom of the groove cavity along the first direction; one end of the first elastic piece abuts against the shoulder and the other end abuts against the valve port.

8. The fluid connector of claim 7, wherein, The opening is not smaller than the button so that the button can be loaded into the installation cavity from the opening, and a second elastic piece for pushing the button to reset from the pressing position to an initial position is arranged on a cavity wall of a side of the installation cavity away from the opening.

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