Connecting structure and self-locking connector

Abstract

The invention relates to a connecting structure and a self-locking connector, the connecting structure comprises an inner sleeve, a lock sleeve, an unlocking sleeve, a push cylinder and an elastic piece, an inner shell is used for being in plug-in connection with a plug-in structure, and the periphery of the inner shell is provided with a positioning part; the lock sleeve is fixedly sleeved outside the inner shell, one end of the lock sleeve comprises an elastic clamping hook, and the elastic clamping hook is used for clamping the plug-in structure; the unlocking sleeve is movably arranged outside the lock sleeve in a sleeving mode and connected with the elastic clamping hook, and the unlocking sleeve can drive the elastic clamping hook to be turned inwards or outwards to be separated from the opposite insertion structure when moving in the axial direction of the lock sleeve; the push cylinder is sleeved outside the inner shell in an axial movement manner and is positioned on the inner ring of the lock sleeve; a limiting part is arranged on the periphery of the push cylinder; the elastic piece is elastically abutted between the limiting part and the positioning part; the lock sleeve comprises a clamping ring arranged on the inner ring of the lock sleeve, the clamping ring abuts against the side, away from the positioning part, of the limiting part, and the push cylinder is used for being pushed by the opposite-insertion structure to move towards the positioning part and compress the elastic piece when the inner shell is connected with the opposite-insertion structure in an inserted mode. The self-locking connector comprises the connecting structure.

Description

Technical Field

[0001] The present application relates to the technical field of connectors, and in particular to a connection structure and a self-locking connector. Background Art

[0002] A connector is a connection element commonly used in electromechanical equipment. In traditional technology, connectors usually include a male end structure and a female end structure. The male end structure and the female end structure can be plugged in separately. When the two are plugged in, they can electrically connect the two connected components together to transmit current or signals. Current connectors are also equipped with a self-locking function to improve the stability of the connection between the male end structure and the female end structure after they are plugged in.

[0003] However, current self-locking connectors have the problem of low separation efficiency. Summary of the invention

[0004] Based on this, it is necessary to provide a connection structure and a self-locking connector to address the problem of low separation efficiency of the current self-locking connector.

[0005] On the one hand, the present application provides a connection structure, the connection structure includes an inner sleeve, a locking sleeve, an unlocking sleeve, a push cylinder and an elastic member, the inner shell is used to be plugged with the plug-in structure, and the inner shell includes a positioning portion arranged on its outer periphery; the locking sleeve is fixedly sleeved on the outside of the inner shell, and one end of the locking sleeve includes an elastic hook, and the elastic hook is used to engage the plug-in structure; the unlocking sleeve is movably sleeved on the outside of the locking sleeve and connected with the elastic hook, and when the unlocking sleeve moves axially along the locking sleeve, it can drive the elastic hook to turn inward or outward and separate from the plug-in structure; the push cylinder is axially movably sleeved on the outside of the inner shell and is located on the inner ring of the locking sleeve, and a limiting portion is provided on the outer periphery of the push cylinder; the elastic member elastically abuts between the limiting portion and the positioning portion; wherein, the locking sleeve includes a snap ring arranged on its inner ring, and the snap ring abuts against a side of the limiting portion away from the positioning portion, and the push cylinder is used to be pushed by the plug-in structure to move toward the positioning portion and compress the elastic member when the inner shell and the plug-in structure are plugged.

[0006] In one embodiment, at least one of the inner periphery of the unlocking sleeve and the outer periphery of the locking sleeve is provided with a protruding abutting portion abutting against the other to limit the turning range of the elastic hook.

[0007] In one of the embodiments, the abutment portion is configured as an abutment ring protruding from the outer periphery of the locking sleeve, and the abutment ring is located on a side of the locking sleeve relative to the snap ring in the axial direction of the locking sleeve, away from the engagement between the elastic hook and the plug-in structure; there are multiple elastic hooks, and the multiple elastic hooks are arranged at intervals along the circumferential direction of the locking sleeve, and the intervals between adjacent elastic hooks extend from one end where the elastic hook is engaged with the plug-in structure to the abutment ring.

[0008] In one embodiment, along the axial direction of the locking sleeve, with the snap ring as the boundary, the elastic hook includes a first section and a second section, the first section is used to engage with the plug-in structure, and the first section is located on the outer circle relative to the second section.

[0009] In one of the embodiments, one end of the unlocking sleeve includes an inwardly turned edge, the elastic hook includes a hook portion for engaging with the plug-in structure, and the hook portion includes a push surface on the side facing the inner shell; in a direction along the axial direction of the locking sleeve pointing into the connecting structure, the push surface gradually deflects radially inward; when the unlocking sleeve moves axially, the inwardly turned edge detents the hook portion along the push surface, causing the elastic hook to turn outward and unlock the plug-in structure.

[0010] In one embodiment, the locking sleeve includes a sleeve body and the elastic hook, the elastic hook is connected to the end of the sleeve body, and the sleeve body is sleeved outside the inner shell and fixedly connected to the inner shell.

[0011] In one embodiment, the connection structure also includes an elastic clamping ring, the outer periphery of the inner shell is recessed with a first ring groove, the inner ring of the sleeve is recessed with a second ring groove, the first ring groove is axially aligned with the second ring groove, part of the structure of the elastic clamping ring is located in the first ring groove, and the other part of the structure is located in the second ring groove to fix the locking sleeve and the inner shell.

[0012] In one of the embodiments, one of the inner periphery of the unlocking sleeve and the outer periphery of the locking sleeve includes a snap-fit ​​piece, and the other is provided with a slot, the slot extending along the axial direction of the connecting structure, and the snap-fit ​​piece is snap-fitted with the slot to limit the travel of the unlocking sleeve.

[0013] In one embodiment, the elastic member is constructed as a wave spring; and / or the connecting structure also includes a first terminal and a first insulator, the first insulator is arranged in the inner shell, and the first terminal is passed through the first insulator for electrical connection with the second terminal of the plug-in structure.

[0014] On the other hand, the present application provides a self-locking connector, which includes a plug-in structure and the connection structure as described above, wherein the plug-in structure is plugged into and electrically connected with the connection structure.

[0015] In the above connection structure, the lock sleeve is fixed to the inner shell, and the elastic hook of the lock sleeve can be fixedly engaged with the plug-in structure when the inner shell is plugged into the plug-in structure, so that the inner shell and the plug-in structure maintain stable plug-in connection, realize self-locking, and improve the connection stability. Among them, the push cylinder is used to be pushed by the plug-in structure when the inner shell is plugged into the plug-in structure and move toward the positioning part and compress the elastic member, that is, when the connection structure is plugged into the plug-in structure, the elastic member is compressed and accumulates elastic force. Therefore, when the unlocking sleeve drives the elastic hook to separate from the plug-in structure, the plug-in structure is unlocked, and the elastic member releases the elastic force at this time, so that the push cylinder can push the plug-in structure in the opposite direction to the plug-in, so that the plug-in structure is separated from the connection structure, and the separation efficiency is improved. Further, the push cylinder can be axially movably sleeved on the outside of the inner shell and is located on the inner ring of the lock sleeve. The push cylinder is limited by the positioning part of the inner shell and the snap ring of the lock sleeve, and moves within a predetermined stroke. That is to say, the locking sleeve provided in the present application can not only realize self-locking by engaging with the plug-in structure, but also provide a limiting function for the push cylinder. Therefore, there is no need to add other structures to limit the push cylinder, making the overall connection structure simpler and more compact. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A top view of a self-locking connector provided in accordance with an embodiment of the present application.

[0017] Figure 2 for Figure 1 The self-locking connector is shown in a cross-sectional view along line AA.

[0018] Figure 3 for Figure 2 A partial enlarged view of point B in the self-locking connector shown.

[0019] Figure 4 for Figure 2 A cross-sectional view of the connection structure in the self-locking connector shown.

[0020] Figure 5 This is a schematic isometric view of a connection structure provided in one embodiment of the present application.

[0021] Figure 6 for Figure 5 Exploded view of the connection structure shown.

[0022] Figure 7 for Figure 4 A cross-sectional view of the locking sleeve in the illustrated connection structure.

[0023] Figure 8 for Figure 6 An axonometric diagram of the locking sleeve in the plug-in structure shown.

[0024] Figure numerals: 10, self-locking connector; 20, connecting structure; 20a, first plug-in end; 30, plug-in structure; 30a, second plug-in end; 31, housing; 31a, locking groove; 31b, stop block; 32, second insulator; 100, inner housing; 110, positioning portion; 111, introduction surface; 120, first shaft section; 130, second shaft section; 131, first ring groove; 200, locking sleeve; 210, elastic hook; 211, first section; 212, second section; 213, snap ring; 213a, Plate body; 214, hook portion; 214a, push surface; 220, sleeve body; 221, clamping piece; 222, second ring groove; 230, abutment ring; 231, ring portion; 300, unlocking sleeve; 310, inner flange; 320, clamping groove; 330, convex portion; 400, push cylinder; 410, limiting portion; 420, cylinder body; 430, push block; 500, elastic member; 600, first terminal; 700, first insulator; 800, elastic clamp ring; 810, notch; 900, sealing ring; O, axial direction. DETAILED DESCRIPTION

[0025] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0026] In the description of the present application, it should be understood that if the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, the orientation or position relationship indicated by these terms is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application.

[0027] In addition, if the terms "first" or "second" appear, these terms are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of this application, if the term "plurality" appears, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0028] In this application, unless otherwise clearly specified and limited, if the terms "installed", "connected", "connected", "fixed" and the like appear, these terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0029] In the present application, unless otherwise clearly specified and limited, if there is a description that a first feature is "above" or "below" a second feature, etc., or similar descriptions appear, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0030] It should be noted that if an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. If an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. If any, the terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in this application are for illustrative purposes only and do not represent the only implementation method.

[0031] The self-locking connector in the traditional technology usually includes a male end structure and a female end structure, and the male end structure and the female end structure can be plugged in separately to achieve electrical conduction. Among them, the plugging of the male end structure and the female end structure is also constructed to have self-locking properties to improve the stability of the plugging of the two. However, it is difficult to determine whether the unlocking is completely completed when the current self-locking connector is unlocked. If the male end structure and the female end structure are pulled apart before the unlocking is not completely completed, the self-locking structure of the self-locking connector will be deformed and damaged, affecting the self-locking stability. Therefore, when unlocking the self-locking connector, it is usually necessary to apply a large unlocking force to completely pull the unlocking part into place, and then pull the male end structure and the female end structure. Although such an operation can reduce the damage to the self-locking connector when pulling and unlocking the self-locking connector, the operation efficiency is low. In other words, in the current self-locking connector, there is a problem of low efficiency in separating the male end structure and the female end structure, which affects the plugging efficiency of the self-locking connector.

[0032] In order to solve the above problems, the present application proposes a connection structure, which includes an inner shell, a locking sleeve, an unlocking sleeve and a push cylinder. The locking sleeve is fixedly sleeved on the inner shell, and when the connection structure is plugged into the plug-in structure, the locking sleeve can engage the plug-in structure to form a self-locking. The unlocking sleeve is movably sleeved on the outside of the locking sleeve to unlock the locking sleeve, so as to facilitate the pulling and separation of the plug-in structure and the connection structure. Furthermore, the push cylinder is movably sleeved on the inner sleeve, and the push cylinder can push the plug-in structure when the locking sleeve is separated from the plug-in structure, so as to separate the plug-in structure from the connection structure, thereby improving the separation efficiency of the two after the connection structure and the plug-in structure are unlocked. The connection structure provided in each embodiment of the present application and the self-locking connector including the connection structure are described in detail below in combination with the drawings and specific embodiments of the specification.

[0033] It should be noted that the structure of the self-locking connector provided in the present application is roughly mutually socketed, so each component can have a roughly parallel or overlapping axis. Therefore, the axial direction of each component can refer to the label O in the drawings of the present application specification, and the circumferential direction described in each embodiment can be the circumferential direction around its axis.

[0034] See also Figure 1 and Figure 2 , Figure 1 FIG. 1 shows a top view of a self-locking connector provided by an embodiment of the present application. Figure 2 for Figure 1 The self-locking connector is shown in a cross-sectional view along line AA. The self-locking connector 10 provided in one embodiment of the present application includes a connection structure 20 and a plug-in structure 30, wherein the plug-in structure 30 is plugged and electrically connected with the connection structure 20. The plug-in structure 30 and the connection structure 20 can be configured to be plugged in a self-locking manner.

[0035] Further, one of the connection structures 20 can be configured as a male end, and the other can be configured as a female end. The connection structure 20 or the plug-in structure 30 as a male end can include a pin terminal, and the connection structure 20 or the plug-in structure 30 as a female end can include a socket terminal. For example, the connection structure 20 can be configured as a female end.

[0036] See also Figure 3 and Figure 4 , combined with Figure 6, the connection structure 20 provided in one embodiment of the present application includes an inner shell 100, a locking sleeve 200, an unlocking sleeve 300, a push cylinder 400 and an elastic member 500, and the locking sleeve 200, the unlocking sleeve 300, the push cylinder 400 and the elastic member 500 can all be arranged on the inner shell 100. Among them, the inner shell 100 is used to be plugged with the plug-in structure 30, and the inner shell 100 includes a positioning portion 110 arranged on its outer periphery. The locking sleeve 200 is fixedly sleeved on the outside of the inner shell 100, and one end of the locking sleeve 200 includes an elastic hook 210, and the elastic hook 210 is used to clamp the plug-in structure 30 to form a self-locking when the connection structure 20 is plugged with the plug-in structure 30. The unlocking sleeve 300 is movably sleeved on the outside of the locking sleeve 200 and is connected by the elastic hook 210. When the unlocking sleeve 300 moves along the axial direction O of the locking sleeve 200, it can drive the elastic hook 210 to turn inward or outward and separate from the plug-in structure 30, that is, the unlocking sleeve 300 can drive the elastic hook 210 to unlock. The push cylinder 400 can be axially movably sleeved on the outside of the inner shell 100 and is located in the inner ring of the locking sleeve 200. The outer periphery of the push cylinder 400 is provided with a limiting portion 410, and the elastic member 500 elastically abuts between the limiting portion 410 and the positioning portion 110. Among them, the locking sleeve 200 includes a snap ring 213 provided on its inner ring, and the snap ring 213 abuts against the side of the limiting portion 410 away from the positioning portion 110. The push cylinder 400 is used to be pushed by the plug-in structure 30 when the inner shell 100 is plugged with the plug-in structure 30, so as to move toward the positioning portion 110 and compress the elastic member 500.

[0037] In the above-mentioned connection structure 20, the locking sleeve 200 is fixed to the inner shell 100, and when the inner shell 100 is plugged with the plug-in structure 30, the elastic hook 210 of the locking sleeve 200 can be fixed with the plug-in structure 30, so that the inner shell 100 and the plug-in structure 30 maintain stable plugging, achieve self-locking, and improve the connection stability. Among them, the push cylinder 400 is used to be pushed by the plug-in structure 30 when the inner shell 100 is plugged with the plug-in structure 30 and move toward the positioning portion 110 and compress the elastic member 500, that is, when the connection structure 20 is plugged with the plug-in structure 30, the elastic member 500 is compressed and accumulates elastic force. Therefore, when the unlocking sleeve 300 drives the elastic hook 210 to separate from the plug-in structure 30, the plug-in structure 30 is unlocked, and at this time, the elastic member 500 releases the elastic force, so that the push cylinder 400 can push the plug-in structure 30 in the opposite direction to the plug-in, so that the plug-in structure 30 is separated from the connection structure 20, and the separation efficiency is improved.

[0038] Furthermore, the push cylinder 400 can be axially movably sleeved outside the inner shell 100 and located in the inner circle of the lock sleeve 200. The push cylinder 400 is limited by the positioning portion 110 of the inner shell 100 and the clamping ring 213 of the lock sleeve 200, and moves within a predetermined stroke. In other words, the lock sleeve 200 provided in the present application can not only be engaged with the plug-in structure 30 to achieve self-locking, but the lock sleeve 200 can also provide a limiting function for the push cylinder 400, so there is no need to add other structures to limit the push cylinder 400, making the connection structure 20 as a whole simpler and more compact.

[0039] See also Figure 5 Further, the connection structure 20 may include a first plug-in end 20a, and the plug-in structure 30 includes a second plug-in end 30a. When the connection structure 20 and the plug-in structure 30 are plugged in, the first plug-in end 20a and the second plug-in end 30a are plugged in toward each other. In the direction away from the first plug-in end 20a along the axial direction O of the connection structure 20, the clamping ring 213, the limiting portion 410, the elastic member 500 and the positioning portion 110 are distributed in sequence. Thus, when the plug-in structure 30 and the connection structure 20 are plugged in, the second plug-in end 30a can push the push cylinder 400 to compress the elastic member 500; when unlocking, the elastic member 500 can drive the push cylinder 400 to move in a direction close to the first plug-in end 20a to push the second plug-in end 30a to separate from the first plug-in end 20a.

[0040] See also Figure 2 and Figure 3 In one embodiment, the plug-in structure 30 may include a housing 31, a second terminal and a second insulator 32. The second insulator 32 is disposed in the housing 31, and the second terminal is passed through the second insulator 32 for electrical connection with the connection structure 20.

[0041] See also Figure 4 In one embodiment, the connection structure 20 further includes a first terminal 600 and a first insulator 700 . The first insulator 700 is disposed in the inner shell 100 . The first terminal 600 is passed through the first insulator 700 for electrically connecting to the second terminal of the plug-in structure 30 .

[0042] Further, the first terminal 600 may be configured as a socket terminal, and the second terminal may be configured as a pin terminal.

[0043] In one embodiment, when the plug-in structure 30 and the connecting structure 20 are plugged into each other, the housing 31 is inserted into the lock sleeve 200 and sleeved on the outside of the push cylinder 400, that is, the housing 31 is embedded between the lock sleeve 200 and the push cylinder 400. The outer periphery of the housing 31 is engaged with the elastic hook 210 to form a self-locking; the inner periphery of the housing 31 is in contact with the push cylinder 400, so that after unlocking, it is pushed by the push cylinder 400 and bounces away from the connecting structure 20.

[0044] See also Figure 3Furthermore, a locking groove 31a is provided on the outer circumference of the housing 31, and the locking sleeve 200 is engaged with the elastic hook 210. At this time, the unlocking sleeve 300 can drive the elastic hook 210 to turn outward, so that the elastic hook 210 can be deformed and escape from the locking groove 31a, thereby unlocking the plug-in structure 30. The housing 31 also includes a stopper 31b provided on its inner circumference. When the plug-in structure 30 is plugged into the connecting structure 20, the stopper 31b can abut against the push cylinder 400, so that the push cylinder 400 moves inward along the axial direction O and compresses the elastic member 500. After unlocking, the push cylinder 400 pushes against the stopper 31b to make the plug-in structure 30 as a whole bounce apart, so as to improve the separation efficiency.

[0045] In another embodiment, the housing 31 can also be sleeved outside the lock sleeve 200, and the lock groove 31a is configured to be opened on the inner circumference of the housing 31. At this time, the unlocking sleeve 300 correspondingly drives the elastic hook 210 to turn inward to unlock the plug-in structure 30. For ease of understanding in the embodiments of the present application, the elastic hook 210 will be separated from the plug-in structure 30 when it turns outward as an example for description.

[0046] In one embodiment, since the snap ring 213 providing a limiting function for the push cylinder 400 is arranged on the inner circumference of the lock sleeve 200, and the movement of the elastic hook 210 separating from the plug structure 30 is an outward movement, in order to reduce the risk of the snap ring 213 everting with the elastic hook 210, which may cause the limit of the limit portion 410 of the push cylinder 400 by the snap ring 213 to loosen, the elastic hook 210 and the snap ring 213 may be arranged in different areas on the axial direction O of the lock sleeve 200 to reduce the influence of the movement of the elastic hook 210 on the position of the snap ring 213.

[0047] Alternatively, see Figure 4 In one embodiment, at least one of the inner circumference of the unlocking sleeve 300 and the outer circumference of the locking sleeve 200 is provided with a protruding abutting portion to abut the other to limit the turning range of the elastic hook 210. Relying on the abutting and limiting effect of the abutting portion, the turning range of the elastic hook 210 can be limited, so that the snap ring 213 maintains the limiting effect on the push cylinder 400, and the overall stability of the connecting structure 20 is improved.

[0048] See also Figure 7 and Figure 8 , combined with Figure 3 and Figure 4In one embodiment, the abutting portion is configured as an abutting ring 230 protruding from the outer periphery of the locking sleeve 200. The abutting ring 230 is located on a side away from the engagement between the elastic hook 210 and the plug-in structure 30 relative to the snap ring 213 in the axial direction O of the locking sleeve 200, that is, a side relatively away from the first plug-in end 20a. There are multiple elastic hooks 210, and the multiple elastic hooks 210 are arranged at intervals along the circumferential direction of the locking sleeve 200, and the intervals between adjacent elastic hooks 210 extend from one end where the elastic hook 210 is engaged with the plug-in structure 30 to the abutting ring 230. By configuring the locking sleeve 200 to include the abutting ring 230, the abutting ring 230 abuts against the unlocking sleeve 300, and the flipping amplitude of the elastic hook 210 can be limited. Therefore, the intervals between the elastic hooks 210 can have a longer extension length, that is, the elastic hooks 210 can have a longer extension length, so they are easier to deform when flipped with the same amplitude, making it easier for the unlocking sleeve 300 to drive the elastic hooks 210 to separate from the plug-in structure 30, thereby reducing the difficulty of unlocking.

[0049] See also Figure 7 and Figure 8 , the intervals between the elastic hooks 210 extend to the area where the abutting ring 230 is located, so as to divide the abutting ring 230 into a plurality of ring portions 231 spaced apart in the circumferential direction of the lock sleeve 200. The number of the ring portions 231 corresponds to the number of the elastic hooks 210, and the plurality of ring portions 231 are arranged one by one on the outer circumferential sides of the plurality of elastic hooks 210 to limit the turning range of the corresponding elastic hooks 210. Similarly, the intervals between the elastic hooks 210 extend to the area where the abutting ring 230 is located, and the snap ring 213 can also be divided into a plurality of plate bodies 213a spaced apart in the circumferential direction of the lock sleeve 200, and the plurality of plate bodies 213a abut against the limiting portion 410 to jointly limit the movement stroke of the push cylinder 400.

[0050] Please continue reading Figure 7 and Figure 8 In one embodiment, along the axial direction O of the lock sleeve 200, with the snap ring 213 as the boundary, the elastic hook 210 includes a first section 211 and a second section 212, the first section 211 is used to engage with the plug-in structure 30, and the first section 211 is located on the outer circle relative to the second section 212. In other words, the first section 211 can have a relatively larger radial dimension relative to the second section 212, so as to accommodate the housing 31 of the plug-in structure 30. The second section 212 has a smaller radial dimension relative to the first section 211, and the radial interval between the second section 212 and the unlocking sleeve 300 is larger than that of the first section 211, so as to facilitate the flipping and deformation of the elastic hook 210.

[0051] Furthermore, the abutment ring 230 can be arranged on the second section 212, that is, a plurality of ring portions 231 are arranged one by one on the outer peripheral side of the second section 212 to limit the turning range of the elastic hook 210. It should be noted that the second section 212 is a section of the elastic hook 210 that is relatively far away from the first plug end 20a, and correspondingly, the limiting portion 410 is limited between the snap ring 213 and the positioning portion 110, and the limiting portion 410 is also located on the side of the snap ring 213 that is relatively far away from the first plug end 20a. Therefore, arranging the abutment ring 230 on the second section 212 can specifically abut to reduce the turning range of the second section 212 and improve the stability of the snap ring 213 limiting the limiting portion 410.

[0052] See also Figure 6 In one embodiment, the elastic member 500 is configured as a wave spring (also called a wave spring or a corrugated spring). In a limited space, the wave spring has a higher spring stiffness than a conventional cylindrical spring and can provide load requirements within a smaller travel range. Thus, while meeting the travel requirements of the push cylinder 400, the distance between the limit portion 410 and the positioning portion 110 can be configured to be smaller, thereby reducing the overall size of the connection structure 20.

[0053] See also Figure 3 and Figure 4 In one embodiment, the abutment portion can also be configured as a convex portion 330, and the convex portion 330 is protruding from the inner circumference of the unlocking sleeve 300. The connecting structure 20 can include both the convex portion 330 and the abutment ring 230, and the two are located at the same axial position O, that is, when the elastic hook 210 is everted, the convex portion 330 and the abutment ring 230 can abut to jointly limit the eversion range of the elastic hook 210.

[0054] See also Figure 7 and Figure 8 In one embodiment, the lock sleeve 200 includes a sleeve body 220 and the elastic hook 210 as described above, the elastic hook 210 is connected to the end of the sleeve body 220, and the sleeve body 220 is sleeved outside the inner shell 100 and fixedly connected to the inner shell 100.

[0055] See also Figure 4 , combined with Figure 7 and Figure 8In one embodiment, one end of the unlocking sleeve 300 includes an inner flange 310. The elastic hook 210 includes a hook portion 214, and the hook portion 214 is used to engage with the plug-in structure 30, that is, the hook portion 214 is used to snap into the lock groove 31a. The side of the hook portion 214 facing the inner shell 100 (that is, its inner peripheral side) includes a push surface 214a. In the direction along the axial direction O of the locking sleeve 200 pointing to the inside of the connecting structure 20, the push surface 214a gradually deflects radially inward. When the unlocking sleeve 300 moves axially, the inner flange 310 pushes the hook portion 214 along the push surface 214a, causing the elastic hook 210 to turn outward and unlock the plug-in structure 30.

[0056] See also Figure 4 In one embodiment, one of the inner periphery of the unlocking sleeve 300 and the outer periphery of the locking sleeve 200 includes a clamping member 221, and the other is provided with a clamping slot 320. The clamping slot 320 extends along the axial direction O of the connecting structure 20, and the clamping member 221 is clamped with the clamping slot 320 to limit the travel of the unlocking sleeve 300. Further, the clamping slot 320 can be provided on the inner peripheral wall of the unlocking sleeve 300, and the clamping member 221 is provided on the outer peripheral wall of the locking sleeve 200.

[0057] See also Figure 4 , combined with Figure 7 and Figure 8 In one embodiment, the connection structure 20 further includes an elastic collar 800. The outer circumference of the inner shell 100 is recessed with a first annular groove 131, and the inner ring of the sleeve 220 is recessed with a second annular groove 222, and the first annular groove 131 and the second annular groove 222 are axially aligned with each other. Part of the structure of the elastic collar 800 is located in the first annular groove 131, and the other part of the structure is located in the second annular groove 222 to fix the lock sleeve 200 and the inner shell 100. In other words, the lock sleeve 200 is fixed to the inner shell 100 by the elastic collar 800. In addition, since the elastic collar 800 fixes the lock sleeve 200 and the inner shell 100 by being simultaneously engaged in the first annular groove 131 and the second annular groove 222, the elastic collar 800 does not occupy additional installation space in the connection structure 20, making the connection structure 20 simpler and more compact as a whole.

[0058] See also Figure 6 , combined with Figure 4In one embodiment, the inner shell 100 includes a first shaft section 120 and a second shaft section 130, and the first shaft section 120 and the second shaft section 130 are connected end to end in the axial direction O of the inner shell 100. The first shaft section 120 is located at the first plug end 20a, and the second shaft section 130 is relatively far away from the first plug end 20a. The outer diameter of the second shaft section 130 is larger than that of the first shaft section 120, so as to form a stepped positioning portion 110 at the boundary between the two. The first annular groove 131 can be arranged in the second shaft section 130, and the area near the outer periphery of the positioning portion 110 is provided with an introduction surface 111. In the direction away from the first plug end 20a along the axial direction O of the inner shell 100, the outer diameter of the introduction surface 111 can be gradually increased, and tilted relative to the axial direction O. A notch 810 is opened at a place in the circumferential direction of the elastic collar 800, so that the elastic collar 800 can be elastically stretched and automatically closed. During assembly, the groove wall of one side of the second annular groove 222 abuts against the elastic collar 800 and moves along the axial direction O of the introduction surface 111. The elastic collar 800 is stretched open by the introduction surface 111 and moves to the second shaft section 130 and is inserted into the first annular groove 131. At this time, the inner ring portion of the elastic collar 800 is inserted into the first annular groove 131, and the outer ring portion is located in the second annular groove 222, so that the lock sleeve 200 is fixed to the inner shell 100.

[0059] See also Figure 3 and Figure 4 In one embodiment, the push cylinder 400 further includes a cylinder body 420 and a push block 430, and the cylinder body 420 is sleeved outside the inner shell 100 and slidably cooperates with the inner shell 100. The limiting portion 410 and the push block 430 are both arranged on the outer periphery of the cylinder body 420, and in the axial direction O of the connecting structure 20, the push block 430 is closer to the first plug-in end 20a than the limiting portion 410. When the plug-in structure 30 is plugged into the connecting structure 20, the push block 430 can be pushed by the abutment block 31b, and move in the direction close to the positioning portion 110 and compress the elastic member 500. After unlocking, the push block 430 can push the abutment block 31b to pop out the plug-in structure 30.

[0060] See also Figure 4 In one embodiment, the connection structure 20 may include a plurality of sealing rings 900, and the sealing rings 900 may be installed between the lock sleeve 200 and the inner shell 100 and between the push cylinder 400 and the inner shell 100. Further, when the plug-in structure 30 is plugged into the connection structure 20, the housing 31 may be sleeved outside the push block 430. The sealing ring 900 may also be embedded in the outer periphery of the push block 430, so as to seal and abut against the housing 31 when the plug-in structure 30 is plugged into the connection structure 20, thereby improving the sealing of the plug-in.

[0061] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0062] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be construed as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent application shall be subject to the attached claims.

Claims

1. A connection structure, characterized in that: The connection structure comprises: An inner shell, used for plugging with the plug-in structure, the inner shell comprising a positioning portion arranged on its outer periphery; A locking sleeve, fixedly sleeved outside the inner shell, one end of the locking sleeve comprising an elastic hook, the elastic hook being used for engaging the plug-in structure; An unlocking sleeve, movably sleeved outside the locking sleeve and connected to the elastic hook, wherein the unlocking sleeve can drive the elastic hook to turn inward or outward and separate from the plug-in structure when moving along the axial direction of the locking sleeve; A push cylinder is axially movably sleeved on the outer side of the inner shell and is located on the inner ring of the lock sleeve, and a limiting portion is provided on the outer periphery of the push cylinder; An elastic member elastically abuts between the limiting portion and the positioning portion; Wherein, the locking sleeve includes a snap ring arranged on its inner ring, the snap ring abuts against the side of the limiting portion facing away from the positioning portion, and the push cylinder is used to be pushed by the plug-in structure to move toward the positioning portion and compress the elastic member when the inner shell is plugged into the plug-in structure.

2. The connection structure according to claim 1, characterized in that: At least one of the inner periphery of the unlocking sleeve and the outer periphery of the locking sleeve is provided with a protruding abutting portion abutting against the other to limit the turning range of the elastic hook.

3. The connection structure according to claim 2, characterized in that: The abutment portion is configured as an abutment ring protruding from the outer periphery of the lock sleeve, and the abutment ring is located on a side of the lock sleeve relative to the clamping ring, away from the clamping position of the elastic clamping hook and the plug-in structure in the axial direction of the lock sleeve; There are multiple elastic hooks, which are spaced apart along the circumferential direction of the lock sleeve, and the intervals between adjacent elastic hooks extend from one end of the elastic hook engaged with the plug-in structure to the abutment ring.

4. The connection structure according to claim 3, characterized in that: Along the axial direction of the locking sleeve, with the snap ring as the boundary, the elastic hook includes a first section and a second section, the first section is used for snapping with the plug-in structure, and the first section is located on the outer circle relative to the second section.

5. The connection structure according to claim 1, characterized in that: One end of the unlocking sleeve includes an inner flange, the elastic hook includes a hook portion for engaging with the plug-in structure, and a side of the hook portion facing the inner shell includes a push surface; In the direction along the axial direction of the locking sleeve pointing into the connecting structure, the push surface gradually deflects radially inward; when the unlocking sleeve moves axially, the inverted edge buckles the hook along the push surface, causing the elastic hook to turn outward and unlock the plug-in structure.

6. The connection structure according to claim 1, characterized in that: The locking sleeve comprises a sleeve body and the elastic hook, wherein the elastic hook is connected to the end of the sleeve body, and the sleeve body is sleeved outside the inner shell and fixedly connected to the inner shell.

7. The connection structure according to claim 6, characterized in that: The connection structure also includes an elastic clamping ring, a first ring groove is recessed on the outer periphery of the inner shell, a second ring groove is recessed on the inner ring of the sleeve, the first ring groove is axially aligned with the second ring groove, part of the structure of the elastic clamping ring is located in the first ring groove, and the other part of the structure is located in the second ring groove to fix the locking sleeve and the inner shell.

8. The connection structure according to claim 1, characterized in that: One of the inner periphery of the unlocking sleeve and the outer periphery of the locking sleeve comprises a clamping piece, and the other is provided with a clamping groove, which extends along the axial direction of the connecting structure. The clamping piece is clamped with the clamping groove to limit the stroke of the unlocking sleeve.

9. The connection structure according to claim 1, characterized in that: The elastic member is configured as a wave spring; and / or The connection structure further includes a first terminal and a first insulator, wherein the first insulator is disposed in the inner shell, and the first terminal is passed through the first insulator for being electrically connected to the second terminal of the plug-in structure.

10. A self-locking connector, characterized in that: The self-locking connector comprises a plug-in structure and a connection structure according to any one of claims 1 to 9, wherein the plug-in structure is plugged into and electrically connected with the connection structure.

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