Connecting joint

Abstract

The present invention provides a connecting joint (100). The connecting joint (100) includes a joint body (10) and a locking spring (20). A slot (11) is provided in the joint body (10), and a stopper (12) is provided on the groove wall of the slot (11). The stopper (12) has a first end face (121) and a second end face (122) that are oppositely installed. The locking spring (20) includes an elastic sheet (21), a locking block (22), and an abutting block (23). A position interference is formed between the abutting block (23) and the mating joint (200). The locking block (22) is driven by the elastic sheet (21) to bypass the first end face (121) and move to the second end face (122). By the contact between the locking block (22) and the second end face (122), the locking spring (20) is locked to the joint body (10), and the mating joint (200) is fixed.

Description

Technical Field

[0001] <Cross - reference to related patent applications> This application claims the priority of a Chinese patent application with the application number 202210950357.0, titled "Connection Joint", filed on August 9, 2022, and a Chinese patent application with the application number 202211442463.4, titled "Connection Joint", filed on November 18, 2022, and all of its contents are incorporated herein by reference.

[0002] The present invention relates to the technical field of the connection of refrigerant pipelines, and particularly to connection joints.

Background Art

[0003] The joint of the box and the connecting pipe are usually connected by a connection joint. Among them, the assembly between the connection joint and the joint requires a self - locking function to prevent the connection joint and the joint from being separated due to the influence of vibration or the like.

[0004] Currently, the connection joints in related technologies usually have a lock spring, and utilize the cooperation between the lock spring and the retaining ring of the joint to fix the joint to the connection joint.

Summary of the Invention

Problems to be Solved by the Invention

[0005] However, the structure of the connection joints in related technologies is complex and cannot be assembled at one time. After assembling the connection joint and the joint, the lock spring deteriorates the stability when locking the joint to the connection joint, and it is easy for the operator to disassemble the connection joint and the joint during operation.

Means for Solving the Problems

[0006] Each embodiment of the present invention provides a connection joint.

[0007] The connecting joint is used to connect the mating joint and the connecting pipe. The connecting joint includes a joint body and a locking spring. A slot is provided in the joint body, and a stopper is provided on the groove wall of the slot. The stopper has a first end face and a second end face, the first end face and the second end face are respectively located on both sides of the stopper, and the first end face and the inner peripheral wall of the joint body are arranged on the same surface. The locking spring includes an elastic sheet, a locking block and an abutting block. The locking block and the abutting block are installed on the elastic sheet. The locking spring can be inserted into the slot and fitted on the inner peripheral wall until the locking block abuts against the first end face of the stopper. A position interference is formed between the abutting block and the mating joint. The abutting block is configured to press the elastic sheet in response to the pressing of the mating joint, and elastically deform the elastic sheet along the axial insertion direction of the mating joint. The locking block is driven by the elastic sheet to bypass the first end face of the stopper and move to the second end face, and the locking spring is locked to the joint body and the mating joint is fixed by the contact between the locking block and the second end face.

[0008] In one embodiment, the abutting block is provided with an abutting inclined surface. The abutting inclined surface is configured to elastically deform the elastic sheet along the axial insertion direction of the mating joint in response to the pressing of the mating joint, fit the locking block to the first end face of the stopper, and move the locking block away from the first end face along the axial insertion direction of the mating joint until the locking block leaves the first end face.

[0009] Due to the pressing of the mating joint, the elastic sheet moves along the axial insertion direction of the locking spring until the locking block moves to the position of the second end face, and uses the elastic reset of the elastic sheet to move the locking block to the second end face along the direction opposite to the axial insertion direction of the mating joint.

[0010] In one embodiment, the stopper is provided with a guide slope, the lock block is provided with a guide mating surface adapted to the guide slope, and the cooperation between the guide slope and the guide mating surface is used as a guide to guide the lock block to move to the second end face.

[0011] In one embodiment, the lock spring is also provided with a limit baffle, and the limit baffle and the lock block are respectively located on both sides of the elastic sheet. When the lock block abuts against the second end face, the limit baffle abuts against the joint body to lock the lock spring to the joint body.

[0012] In one embodiment, the elastic sheet is provided with a protrusion, the protrusion has a contact surface, the contact surface is disposed in close contact with the inner peripheral wall, and the elastic sheet is guided to elastically deform along the axial insertion direction of the mating joint.

[0013] In one embodiment, the lock spring further includes a guide baffle, and the lock spring acts on the mating joint through the guide baffle to lock the mating joint to the joint body.

[0014] The joint body is provided with a chute adapted to the guide baffle, and the cooperation between the guide baffle and the chute is used as a guide to guide the lock spring to be inserted into the slot of the joint body.

[0015] In one embodiment, the elastic sheet is further provided with a boss. When the lock block abuts against the first end face, the boss snaps into connection with the joint body to restrict the lock spring from detaching from the joint body.

[0016] In one embodiment, a fixing ring is removably attached to the joint body, a connecting rib is provided on the fixing ring, and the lock spring abuts the locking block against the connecting rib via the elastic sheet, so as to limit the continuous insertion of the lock spring into the joint body.

[0017] In one embodiment, a foolproof component is provided on the fixing ring, a foolproof matching component adapted to the foolproof component is provided on the joint body, and the fixing ring is guided to be attached to the joint body by guiding the alignment between the foolproof component and the foolproof matching component.

[0018] In one embodiment, a convex buckle is provided on the outer peripheral wall of the fixing ring, a buckle groove adapted to the convex buckle is provided on the joint body, and the fixing ring can be snap-connected to the joint body by the cooperation between the convex buckle and the buckle groove.

[0019] In one embodiment, the elastic sheet is provided with a plurality of protruding thorns, and the plurality of protruding thorns are arranged at intervals on one end face along the direction in which the lock spring of the elastic sheet is inserted into the joint body.

[0020] The connecting joint further includes a first sealing ring, a spacer ring and a second sealing ring. The first sealing ring, the spacer ring and the second sealing ring are sequentially embedded in the joint body, and the mating joint cooperates with the joint body to simultaneously push and deform the first sealing ring and the second sealing ring.

[0021] Details of one or more embodiments of the present invention are described in the following drawings and description. Other features, objects and advantages of the present invention will become apparent from the specification, drawings and claims.

Brief Description of the Drawings

[0022] To more clearly explain the technical solution in the embodiment of the present invention, the drawings necessary for the description of the embodiment are briefly introduced below. Obviously, the drawings in the following description are only the embodiments of the present invention, and those skilled in the art can obtain other drawings based on the disclosed drawings without creative efforts.

[0023]

Figure 1

Figure 2

Figures 3 - 4

Figures 5 - 7

Figures 8 - 9

Figures 10 - 11

Figures 12A - 12D

Figures 13A - 13D

Figures 14A - 14D

Figures 15A - 15D

Figures 16A - 16D

Figure 17

Embodiments for Carrying Out the Invention

[0024] Hereinafter, in combination with the drawings of the embodiments of the present invention, the technical solutions of the embodiments of the present invention will be clearly and completely described. Obviously, the described embodiments are only a part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative efforts belong to the protection scope of the present invention.

[0025] It should be noted that when an element is said to be "arranged" on another element, this element may be directly arranged on the other element, or may be arranged on the other element through other elements. When an element is considered to be "arranged" on another element, this element may be directly arranged on the other element, or there may be intervening elements. When an element is considered to be "fixed" on another element, this element may be directly fixed on the other element, or there may be intervening elements.

[0026] Unless otherwise defined, all technical terms and scientific terms used in the present invention have the same meaning as commonly understood by those skilled in the technical field to which the present invention belongs. The terms used in the specification of the present invention are only for the purpose of explaining specific embodiments and are not intended to limit the present invention. The term "and / or" used in the specification of the present invention includes any combination and all combinations of one or more related listed items.

[0027] As shown in FIG. 1, the connection joint 100 of the present invention is used to connect the mating joint 200 and the connection pipe 300. It should be noted that the mating joint 200 and the connection joint 100 of the present invention may be arranged as male and female joints according to actual needs. Specifically, the mating joint 200 is attached to a box (not shown) for accommodating liquid, and the connection pipe 300 may specifically be a hose.

[0028] As shown in FIGS. 3 and 4, the connection joint 100 according to the embodiment of the present invention includes a joint body 10, a lock spring 20, a fixing ring 30, a first seal ring 40, a spacer ring 50, and a second seal ring 60.

[0029] As shown in FIGS. 5 to 9, a slot 11 is provided in the joint body 10, and the lock spring 20 is inserted into the joint body 10 through the slot 11 to lock the mating joint 200 to the joint body 10. That is, specifically, the connection joint 100 of the present invention uses the lock spring 20 to lock the mating joint 200 inserted into the joint body 10. Note that the direction in which the lock spring 20 of the present invention is inserted into the slot 11 of the joint body 10 is orthogonal to the direction in which the mating joint 200 is inserted into the connection joint 100 when the mating joint 200 is attached to the connection joint 100.

[0030] In the present invention, a stopper 12 is provided on a groove wall 111 of a slot 11 of a joint body 10. The stopper 12 has a first end face 121 and a second end face 122, and the first end face 121 and the second end face 122 are respectively located on both sides of the stopper 12. The first end face 121 and an inner peripheral wall 101 of the joint body 10 are arranged on the same surface. The lock spring 20 includes an elastic sheet 21, and a lock block 22 and an abutting block 23 are provided on the elastic sheet 21. The lock spring 20 can insert the lock block 22 into the slot 11 until the lock block 22 abuts against the first end face 121 of the stopper 12 by fitting the lock block 22 to the inner peripheral wall 101. The abutting block 23 is provided with an abutting slope 231. The mating joint 200 can push the abutting block 23 through the abutting slope 231, and the abutting block 23 uses the elastic deformation of the elastic sheet 21 to move the lock block 22 to the position of the second end face 122 of the stopper 12 and lock the lock spring 20 to the joint body 10. By arranging the abutting slope 231 on the abutting block 23, it is understood that in the process of the mating joint 200 being inserted into the joint body, by using the pushing of the abutting slope 231, the driving of the elastic deformation of the elastic sheet 21 can be realized, and the lock block 22 can be moved from the first end face 121 of the stopper 12 to the second end face 122 while the elastic sheet 21 is elastically deformed. That is, when the connecting joint 100 of the present invention and the mating joint 200 are inserted and fitted, the inserted mating joint 200 acts on the abutting slope 231 of the abutting block 23 of the lock spring 20, and by using the structural characteristics of the elastic deformation of the elastic sheet 21, the lock block 22 is moved from the first end face 121 abutting against the stopper 12 to the second end face 122 of the stopper 12 and abuts against the second end face 122. Thereby, the lock spring 20 is locked to the joint body 10, and thereby, the mating joint 200 inserted into the connecting joint 100 is locked.

[0031] In the present invention, due to the above reasonable structural arrangement, when the connection joint 100 and the mating joint 200 are inserted and fitted, the mating joint 200 can act on the abutting block 23 of the elastic sheet 21, and by utilizing the structural characteristics of the elastic deformation of the elastic sheet 21, the elastic sheet 21 is elastically deformed along the axial insertion direction of the mating joint 200. As a result, the locking block 22 is driven by the elastic sheet 21 to bypass the first end face 121 of the stopper 12 and move to the second end face 122. Thereby, the locking spring 20 is locked to the joint body 10 and the mating joint 200 is fixed. Therefore, the mating joint 200 can be assembled at a predetermined position of the connection joint 100 at one time. In this process, since there is no need to use external tools or manually reassemble, the connection joint 100 and the mating joint 200 can be easily assembled, and the stability of the overall structure after both the connection joint 100 and the mating joint 200 are assembled is improved. At the same time, the locking spring 20 can continue to be inserted into the joint body 100 under the drive of the mating joint 200. Thereby, the locking of the position where the locking spring 20 is attached to the joint body 10 can be realized, and it is possible to avoid pressing the locking spring 20 again for later locking. Thereby, the assembly efficiency when the connection joint 100 and the mating joint 200 are assembled is improved.

[0032] The number of the elastic sheets 21 in the locking spring 20 of the present invention is two, and each elastic sheet 21 is provided with a locking block 22 and an abutting block 23 respectively. In order to meet the usage needs of attaching the locking spring 20 to the joint body 10, the stopper 12 of the joint body 10 is arranged in a one-to-one correspondence with the locking block 22.

[0033] Note that a convex ring 210 is provided on the outer wall of the mating joint 200, and the mating joint 200 can push the abutting slope 231 of the abutting block 23 by using the convex ring 210. Due to the structural characteristics of the abutting slope 231, when the convex ring 210 of the mating joint 200 starts to push the abutting slope 231 of the abutting block 23, the locking block 22 of the elastic sheet 21 fits onto the inner peripheral wall 101 of the joint body 10. Therefore, the abutting block 23 can only drive the elastic sheet 21 to deform in the axial insertion direction of the mating joint 200. That is, the locking block 22 is moved to fit onto the first end face 121 of the stopper 12. When the locking block 22 moves away from the first end face 121, it restricts the elastic sheet 21 from continuously deforming in the axial insertion direction of the mating joint 200 under the elastic restoring force generated by the elastic deformation of the elastic sheet 21. As a result, when the convex ring 210 of the mating joint 200 continuously pushes the abutting slope 231 of the abutting block 23, the elastic sheet 21 expands outward from the inner peripheral wall 101 of the joint body 10. That is, the locking block 22 is moved to the position of the second end face 122 of the stopper 12, and the abutting slope 231 of the abutting block 23 is prevented from being pushed by the convex ring 210 of the mating joint 200. Finally, due to the elastic reset of the elastic sheet 21, the locking block 22 is moved along the second end face 122 of the stopper 12 in the direction opposite to the axial insertion direction of the mating joint 200, realizing the contact between the locking block 22 and the stopper 12. That is, the contact between the stopper 12 and the locking block 22 realizes the locking of the locking spring 20 by the joint body 10. Of course, during the process of inserting the locking spring 20 into the slot 11 of the joint body 10, the two elastic sheets 21 of the locking spring 20 are pushed and closed, and during the process of inserting the locking spring 20 into the joint body 10, the locking block 22 of the locking spring 20 is always in contact with the inner peripheral wall 101 of the joint body 10.

[0034] The stopper 12 of the present invention is provided with a guide slope 123, and the lock block 22 is provided with a guide mating surface 221 that matches the guide slope 123. Guided by the cooperation between the guide slope 123 and the guide mating surface 221, the lock block 22 is guided to move to the second end face 122. Thereby, during the elastic deformation reset process of the elastic sheet 21, the guide slope 123 can guide the moving direction of the lock block 22, whereby the lock block 22 can be driven by the elastic sheet 21 to move to the position of the second end face 122 of the stopper 12, and locking between the lock block 22 and the stopper 12 is achieved.

[0035] The elastic sheet 21 of the present invention is provided with a protrusion 24. The protrusion 24 has a contact surface 241, and the contact surface 241 is disposed in close contact with the inner peripheral wall 101. The abutting block 23 is adapted to guide the elastic deformation of the elastic sheet 21 along the axial insertion direction of the mating joint 200. That is, during the process of inserting the lock spring 20 of the present invention into the joint body 10, when the lock block 22 and the protrusion 24 of the elastic sheet 21 are simultaneously in close contact with the inner peripheral wall 101 and the elastic sheet 21 is driven by the abutting block 23 to elastically deform, the contact surface 241 of the protrusion 24 remains disposed in close contact with the inner peripheral wall 101 and can realize the guiding function, ensuring that the elastic sheet 21 disengages the lock block 22 from the first end face 121 of the stopper 12 and can move it to the position of the second end face 122 of the stopper 12.

[0036] Since the protrusion 24 is provided on one side of the elastic sheet 21 facing the axial insertion direction of the mating joint 200, the elastic sheet 21 can only elastically deform along the axial insertion direction of the mating joint 200.

[0037] Incidentally, in the process where the mating joint 200 is axially inserted into the joint body 10 and locked by the locking spring 20, the contact surface 241 of the protruding portion 24 is installed in close contact with the inner peripheral wall 101 of the joint body 10. Thereby, guiding the fitting between the contact surface 241 of the protruding portion 24 and the inner peripheral wall 101 of the joint body 10, the elastic sheet 21 can be guided to elastically deform along the axial insertion direction of the mating joint 200, disengaging the locking block 22 from the first end surface 121 of the stopper 12, and guiding the elastic sheet 21 to elastically deform along the direction opposite to the axial insertion direction of the mating joint 200, moving the locking block 22 to the second end surface 122 of the stopper 12.

[0038] The locking spring 20 of the present invention further includes a guide baffle 25, and the locking spring 20 can act on the mating joint 200 through the guide baffle 25 to lock the mating joint 200 to the joint body 10. Thereby, the locking spring 20 locks the mating joint 200 inserted into the joint body 10.

[0039] The joint body 10 is provided with a chute 13 adapted to the guide baffle 25. Guided by the cooperation between the guide baffle 25 and the chute 13, the locking spring 20 is guided to be inserted into the slot 11 of the joint body 10. Thereby, the locking spring 20 can be easily pre - attached to the joint body 10, meeting the usage needs of attaching the locking spring 20 to the joint body 10.

[0040] Due to the structural arrangement of the guide baffle 25, the locking spring 20 can lock the mating joint 200 inserted into the joint body 10, and through the cooperation between the guide baffle 25 and the chute 13, the guide baffle 25 plays a guiding role in the process of inserting the locking spring 20 into the joint body 10, meeting the usage needs of inserting the locking spring 20 into the joint body 10.

[0041] The elastic sheet 21 of the present invention is also provided with a boss 26. When the lock block 22 abuts against the first end face 121, the boss 26 is snap-connected to the joint body 10, and the lock spring 20 can be restricted from detaching from the joint body 10. When the lock spring 20 is pre-attached to the joint body 10, by utilizing the snap connection between the boss 26 and the joint body 10, it can play a restrictive role in preventing the lock spring 20 pre-attached to the joint body 10 from falling off, and the lock spring 20 can be prevented from detaching from the joint body 10. Therefore, the connection joint 100 can be supplied to the outside as a whole, facilitating subsequent packaging and transportation and reducing costs.

[0042] Specifically, the joint body 10 is provided with a boss contact surface 102, and the boss contact surface 102 is installed on the outer side of the inner peripheral wall 101 of the joint body 10 in accordance with the boss 26. Thereby, when the lock spring 20 is inserted into the slot 11 of the joint body 10, the boss 26 of the lock spring 20 is pushed against the inner peripheral wall 101 and contracted to the corresponding elastic sheet 21. When the boss 26 detaches from the inner peripheral wall 101 and moves to the position of the boss contact surface 102, the elastic sheet 21 can be elastically reset, moving the boss 26 outward to realize the snap connection between the boss 26 and the boss contact surface 102, whereby the lock spring 20 can be restricted from detaching from the joint body 10.

[0043] The elastic sheet 21 of the present invention is provided with a plurality of protruding thorns 211, and the plurality of protruding thorns 211 are arranged at intervals on one end face along the direction in which the lock spring 20 of the elastic sheet 21 is inserted into the joint body 10. Thereby, by utilizing the tingling feeling of the finger when the protruding thorn 211 touches the finger, the operator can be restricted, and the structural stability of the connection joint 100 and the mating joint 200 after assembly can be ensured.

[0044] In addition, a limit baffle 27 is also provided on the lock spring 20 of the present invention. When the lock block 22 abuts against the second end face 122, the limit baffle 27 abuts against the joint body 10, so as to limit the lock spring 20 from continuously inserting into the joint body 10. Thus, on the premise of satisfying the need to attach the lock spring 20 to the joint body 10, when unlocking the connection joint 100 and the mating joint 200 later, a unlocking tool can be used to lift the limit baffle 27, and the lock on the lock spring 20 can be released from the joint body 10.

[0045] Among them, the limit baffle 27 of the present invention is partially raised in a direction away from the joint body 10 to form a warped portion 271, and the unlocking tool can be inserted into the position of the warped portion 271 to lift the warped portion 271. This is convenient for unlocking after the connection joint 100 and the mating joint 200 are completely assembled. In addition, the above unlocking tool may be arranged in a structure having a flat head, and the flat head can be inserted into the warped portion 271.

[0046] It can be understood that due to the structural arrangement of the above limit baffle 27, after the mating joint 200 is assembled to the joint body 10, the entire lock spring 20 can be locked to the joint body 10.

[0047] Referring to FIGS. 12 to 17 together, the process of axially inserting the mating joint 200 into the joint body 10 will be described in detail from the following first stage to the fourth stage.

[0048] Referring to FIGS. 12A to 12D, in the first stage, the lock spring 20 fits the lock block 22 onto the inner peripheral wall 101 and inserts it into the slot 11 until the lock block 22 abuts against the first end face 121 of the stop 12. The mating joint 200 is inserted into the joint body 10 of the connection joint 100 and abuts against the abutting block 23 of the elastic sheet 21 of the lock spring 20.

[0049] Referring to FIGS. 13A to 13D, in the second stage, the mating joint 200 presses the abutting block 23 of the elastic sheet 21 of the lock spring 20 through the convex ring 210, and elastically deforms the elastic sheet 21 along the axial insertion direction of the mating joint 200. Since the locking block 22 of the elastic sheet 21 fits into the inner peripheral wall 101 of the joint body 10, the abutting block 23 can only deform the elastic sheet 21 in the axial insertion direction of the mating joint 200. However, the first end face 121 and the inner peripheral wall 101 of the joint body 10 are arranged on the same plane, that is, the locking block 22 is fitted and moved to the first end face 121 of the stopper 12. The elastic sheet 21 can be elastically deformed only along the axial direction of the mating joint 200, and the deformation in the radial direction of the mating joint 200 is restricted.

[0050] Referring to FIGS. 14A to 14D and FIGS. 15A to 15D, in the third stage, the locking block 22 fits and moves on the first end face 121 of the stopper 12. After leaving the first end face 121, the locking block 22 receives the elastic restoring force generated by the elastic deformation of the elastic sheet 21, and restricts the elastic sheet 21 from continuously deforming in the axial insertion direction of the mating joint 200. Also, the force exerted by the mating joint 200 on the abutting slope of the abutting block can be decomposed into two component forces acting on the elastic sheet 21. One component force is along the insertion direction of the mating joint 200, and the other component force is along the direction in which the lock spring 20 is inserted into the joint body 10. As the convex ring 210 of the mating joint 200 continuously presses the abutting block 23, the abutting block 23 receives a radial expansion force through the abutting slope 231, and the elastic sheet 21 expands outward from the inner peripheral wall 101 of the joint body 10. At this time, the abutting slope 231 is not pressed by the convex ring 210 of the mating joint 200, and the elastic sheet 21 moves the locking block 22 to the position of the second end face 122 of the stopper 12.

[0051] Referring to FIGS. 16A to 16D, in the fourth stage, due to the elastic reset of the elastic sheet 21, the lock block 22 is moved along the second end face 122 of the stopper 12 in a direction opposite to the axial insertion direction of the mating joint 200, towards the second end face 122 of the stopper 12, to achieve the contact between the lock block 22 and the stopper 12, that is, to achieve the automatic locking of the lock spring 20.

[0052] As shown in FIGS. 10 and 11, a connecting rib 31 is provided on the fixing ring 30 of the present invention. The lock spring 20 abuts the lock block 22 against the connecting rib 31 via the elastic sheet 21, so as to limit the continuous insertion of the lock spring 20 into the joint body 10. Thus, it can play a restrictive role in preventing the lock spring 20 pre-mounted on the joint body 10 from being over-inserted into the joint body 10. That is, the assembly position between the lock spring 20 and the joint body 10 can be determined, and then the overall packaging and transportation requirements of the connection joint 100 can be met. In addition, an avoidance structure (not shown) is provided on the fixing ring 30 of the present invention. The avoidance structure plays an avoidance role when the lock spring 20 is inserted into the joint body 10, so as to meet the usage requirement that the lock spring 20 can be inserted into the joint body 10.

[0053] Among them, a foolproof part 32 is provided on the fixing ring 30 of the present invention, and a foolproof matching part 14 adapted to the foolproof part 32 is provided on the joint body 10. Guided by the alignment between the foolproof part 32 and the foolproof matching part 14, the fixing ring 30 is guided to be attached to the joint body 10. Thereby, it can play a foolproof role when the fixing ring 30 is assembled to the joint body 10, and the fixing ring 30 can be easily attached to the joint body 10. The foolproof role by assembling the fixing ring 30 to the joint body 10 specifically refers to accurately positioning the position where the fixing ring 30 is attached to the joint body 10.

[0054] Specifically, the foolproof component 32 of the present invention is specifically configured as a groove 321 provided on the outer peripheral wall 301 of the fixed ring 30, and the foolproof matching component 14 is configured as a rib 141 provided on the inner peripheral wall 101 of the joint body 10. The fixed ring 30 is guided to be attached to the joint body 10 by the concave-convex fitting between the groove 321 and the rib 141. Of course, the foolproof component 32 and the foolproof matching component 14 are not limited to the groove 321 and the rib 141 as shown in the figure. For those skilled in the art, the foolproof component 32 and the foolproof matching component 14 may be installed in a one-to-one corresponding wire-drawing structure, which will not be described in detail here.

[0055] A convex buckle 33 is provided on the outer peripheral wall 301 of the fixed ring 30 of the present invention, and a buckle groove 15 adapted to the convex buckle 33 is provided on the joint body 10. The fixed ring 30 can be snap-connected to the joint body 10 by the cooperation between the convex buckle 33 and the buckle groove 15, thereby specifically realizing the assembly connection between the fixed ring 30 and the joint body 10 and easily attaching the fixed ring 30 to the joint body 10.

[0056] The first seal ring 40, the spacer ring 50, and the second seal ring 60 of the present invention are sequentially embedded in the joint body 10, and the mating joint 200, in cooperation with the joint body 10, and by simultaneously pushing and deforming the first seal ring 40 and the second seal ring 60, can play a role of double sealing when the connection joint 100 and the mating joint 200 are inserted, so as to meet the use needs of the seal for attaching between the connection joint 100 and the mating joint 200.

[0057] As shown in FIG. 2, a limiting step 51 is provided on the spacer ring 50, and a step surface 16 adapted to the limiting step 51 is provided on the joint body 10. The spacer ring 50 can be attached to the joint body 10 until the limiting step 51 of the spacer ring 50 abuts against the step surface 16. That is, the position where the spacer ring 50 is assembled to the joint body 10 can be determined. Thereby, the size of the region of the joint body 10 used for assembling the first seal ring 40 and the second seal ring 60 can be made larger than the corresponding first seal ring 40 and second seal ring 60, and a deformation space corresponding to the corresponding first seal ring 40 and the corresponding second seal ring 60 is provided. Note that a first limiting boss 17 and a second limiting boss 18 are also formed on the inner peripheral wall 101 of the joint body 10 of the present invention. The first limiting boss 17 can abut against the first seal ring 40 and limit the first seal ring 40 at a position between the first limiting boss 17 and the spacer ring 50. The second limiting boss 18 can abut against the fixed ring 30 and limit the second seal ring 60 at a position between the spacer ring 50 and the fixed ring 30. Therefore, the usage needs for the first seal ring 40 and the second seal ring 60 to be pushed and deformed can be satisfied.

[0058] Furthermore, it should be noted that a third seal ring 70 is fitted into the end of the joint body 10 of the present invention away from the fixed ring 30, and the connecting joint 100 can be assembled and sealed with the connecting pipe 300 via the third seal ring 70. Of course, the number of the third seal rings 70 can be set to a plurality according to usage needs, but this will not be described here.

[0059] In summary, since the reasonable structure described above is arranged in the connecting joint 100 of the present invention, the connecting joint 100 and the mating joint 200 can be assembled at a predetermined position at one time. In this process, there is no need to use external tools or manually reassemble, the assembly of the connecting joint 100 and the mating joint 200 becomes easy, and the stability of the overall structure after the connecting joint 100 and the mating joint 200 are assembled is improved.

[0060] Each technical feature of the above-described embodiments can be arbitrarily combined. However, for the sake of brevity of description, not all possible combinations of each technical feature in the foregoing embodiments are described. As long as the combinations of these technical features do not conflict, all of them should be regarded as being within the scope of the description in this specification.

[0061] It should be noted that for those skilled in the art, the foregoing embodiments are only used to explain the present invention and should not be construed as limiting the scope of the patent application. Without departing from the spirit and scope of the present invention, some modifications and corrections can be made, and all of them belong to the protection scope of the present invention.

Description of Reference Numerals

[0062] 100 Connection joint 200 Counterpart joint 300 Connection pipe 10 Joint body 20 Lock spring 30 Fixed ring 40 First sealing ring 50 Spacer ring 60 Second sealing ring 70 Third sealing ring 11 Joint body 12 Stopper 13 Shoot 14 Foolproof matching part 15 Buckle groove 16 Step surface 17 First limiting boss 18 Second limiting boss 21 Elastic sheet 22 Lock block 23 Abutting block 24 Protrusion 25 Guide baffle 26 Boss 27 Limit baffle 30 Fixed ring 31 Connecting rib 32 Foolproof parts 33 Convex buckle 51 Limiting step 101 Inner peripheral wall of the joint body 102 Boss contact surface 111 Groove wall of slot 11 121 First end face 122 Second end face 123 Guide inclined plane 141 Rib 210 Convex ring 221 Guide mating surface 211 Protruding ridge 231 Pushing inclined plane 241 Contact surface 271 Warping part 301 Outer peripheral wall of the fixing ring 321 Groove

Claims

1. In a connecting joint used for connecting a mating joint and a connecting pipe, the connecting joint includes a joint body and a lock spring, a slot is provided in the joint body, a stopper is provided on the groove wall of the slot, the stopper has a first end face and a second end face, the first end face and the second end face are respectively located on both sides of the stopper, and the first end face and the inner peripheral wall of the joint body are arranged on the same surface, the lock spring includes an elastic sheet, a lock block and an abutting block, the lock block and the abutting block are installed on the elastic sheet, and the lock spring can be inserted into the slot until the lock block abuts against the first end face of the stopper after being fitted to the inner peripheral wall, a position interference is formed between the abutting block and the mating joint, and the abutting block is configured to press the elastic sheet in response to the pressing of the mating joint, so that the elastic sheet is elastically deformed along the axial insertion direction of the mating joint, and the lock block is driven by the elastic sheet to bypass the first end face of the stopper and move to the second end face, and the lock spring is locked to the joint body and the mating joint is fixed by the abutting between the lock block and the second end face. A connecting joint characterized by this.

2. The abutting block is provided with an abutting slope, and the abutting slope is configured to elastically deform the elastic sheet along the axial insertion direction of the mating joint in response to the pressing of the mating joint, the lock block is fitted to the first end face of the stopper, and the lock block moves away from the first end face until it reaches the axial insertion direction of the mating joint, due to the pressing of the mating joint, the elastic sheet moves in the axial insertion direction of the lock spring until the lock block is driven to move to the position of the second end face, and the elastic reset of the elastic sheet is utilized to move the lock block along the direction opposite to the axial insertion direction of the mating joint to the second end face. The connecting joint according to claim 1, characterized by this.

3. The stopper is provided with a guide slope, the lock block is provided with a guide mating surface adapted to the guide slope, and the cooperation between the guide slope and the guide mating surface is used as a guide to guide the lock block to move to the second end face. The connecting joint according to claim 2 is characterized in that.

4. The lock spring is also provided with a limit baffle, and the limit baffle and the lock block are respectively located on both sides of the elastic sheet. When the lock block abuts against the second end face, the limit baffle abuts against the joint body, and the lock spring can be locked to the joint body. The connecting joint according to claim 1 is characterized in that.

5. The elastic sheet is provided with a protrusion, the protrusion has a contact surface, the contact surface is disposed in close contact with the inner peripheral wall, and the elastic sheet is guided to elastically deform along the axial insertion direction of the mating joint. The connecting joint according to claim 1 is characterized in that.

6. The lock spring further includes a guide baffle, and the lock spring acts on the mating joint through the guide baffle to lock the mating joint to the joint body. The joint body is provided with a chute adapted to the guide baffle, and the cooperation between the guide baffle and the chute is used as a guide to guide the lock spring to be inserted into the slot of the joint body. The connecting joint according to claim 1 is characterized in that.

7. The elastic sheet is further provided with a boss. When the lock block abuts against the first end face, the boss snaps onto the joint body to restrict the lock spring from detaching from the joint body. The connecting joint according to claim 1 is characterized in that.

8. A fixing ring is removably attached to the joint body, the fixing ring is provided with a connecting rib, and the lock spring abuts the lock block against the connecting rib through the elastic sheet to limit the continuous insertion of the lock spring into the joint body. The connecting joint according to claim 1 is characterized in that.

9. The fixed ring is provided with foolproof parts, and the joint body is provided with foolproof matching parts that match the foolproof parts. Guided by the alignment between the foolproof parts and the foolproof matching parts, the fixed ring is guided to be attached to the joint body. The connecting joint according to claim 8, characterized in that.

10. A convex buckle is provided on the outer peripheral wall of the fixed ring, and a buckle groove that matches the convex buckle is provided on the joint body. The fixed ring can be snap-connected to the joint body by the cooperation between the convex buckle and the buckle groove. The connecting joint according to claim 8, characterized in that.

11. The elastic sheet is provided with a plurality of protruding thorns, and the plurality of protruding thorns are arranged at intervals on one end face along the direction in which the lock spring of the elastic sheet is inserted into the joint body. The connecting joint according to claim 1, characterized in that.

12. The connecting joint further includes a first seal ring, a spacer ring, and a second seal ring. The first seal ring, the spacer ring, and the second seal ring are sequentially embedded in the joint body, and the mating joint, in cooperation with the joint body, simultaneously presses and deforms the first seal ring and the second seal ring. The connecting joint according to claim 1, characterized in that.

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