Plug-in terminal and electrical connection structure

Abstract

The utility model relates to a plug-in terminal and an electric connection structure, and the plug-in terminal comprises a plug connector and a limiting sleeve, the plug connector is provided with a plug-in end used for plugging, and the plug connector is provided with a fixing hole; the limiting sleeve has an elastic property and comprises a sleeve body, a locking arm and a clamping wing, the sleeve body is sleeved outside the plug connector, the locking arm is connected with the sleeve body and clamped into the fixing hole so as to fix the sleeve body and the plug connector, the clamping wing is connected with the peripheral wall of the outer ring of the sleeve body and is turned outwards relative to the sleeve body, and one side, deviating from the plug-in end, of the clamping wing is used for abutting against the clamping part. And the locking arm is connected with the sleeve body and is clamped into the fixing hole, so that the sleeve body and the plug connector can be relatively fixed. The clamping fins are connected with the outer ring peripheral wall of the sleeve body and turned outwards relative to the sleeve body, and the sides, deviating from the plugging end, of the clamping fins are used for abutting against the clamping parts, so that the sleeve body and the clamping parts can be fixed through the clamping fins, and the position stability of the plugging terminal is improved. The electric connection structure comprises the plug-in terminal and has better reliability.

Description

Technical Field

[0001] The present application relates to the field of electrical connection technology, and in particular to a plug-in terminal and an electrical connection structure. Background Art

[0002] An electrical connector is an electronic engineering device used to achieve electrical connections between devices, between devices, and between electrical components. An electrical connector usually includes a male end and a female end that plug into each other, and the male end and the female end usually have similar structural components: a connecting terminal and an insulator. The connecting terminal is inserted into the insulator to maintain fixation with the insulator.

[0003] However, the fixing method of the connection terminal and the insulator using interference fit is not stable enough. After repeated plugging and unplugging of the electrical connector and long-term use, the two are prone to loosening and separation, affecting the reliability of the electrical connector. Utility Model Content

[0004] Based on this, it is necessary to provide a plug-in terminal and an electrical connection structure to address the problem of insufficient stability of interference fit between the connection terminal and the insulator in the electrical connector.

[0005] On the one hand, the present application provides a plug-in terminal, which includes a plug-in connector and a limiting sleeve, wherein the plug-in connector is provided with a plug-in end for plugging in, and the plug-in connector is provided with a fixing hole; the limiting sleeve has elastic properties, and the limiting sleeve includes a sleeve body, a locking arm and a clamping wing, the sleeve body is sleeved outside the plug-in connector, the locking arm is connected to the sleeve body and clamped into the fixing hole to fix the sleeve body and the plug-in connector, the clamping wing is connected to the outer circumferential wall of the sleeve body and turned relative to the sleeve body, and the side of the clamping wing facing away from the plug-in end is used to abut the clamping portion.

[0006] In one of the embodiments, the locking arm is extended around the circumferential direction of the limiting sleeve to embrace the outer circumference of the connector, and the free end of the locking arm is bent and inserted into the fixing hole.

[0007] In one embodiment, the number of the locking arms is at least two, and the free ends of at least two of the locking arms are arranged opposite to each other and bent to be inserted into the fixing hole to respectively abut against two oppositely arranged hole walls of the fixing hole.

[0008] In one of the embodiments, a positioning hole is opened on the outer periphery of the plug-in component, the sleeve has elastic properties, and an area of the sleeve is inverted to form a positioning piece, and the positioning piece is engaged with the positioning hole.

[0009] In one embodiment, the sleeve body is provided with a first forming hole, one side of the positioning piece is connected to the hole wall of the first forming hole, and the other side is turned inside out relative to the sleeve body.

[0010] In one embodiment, there are multiple clamping wings, and the multiple clamping wings are arranged at intervals along the circumferential direction of the limiting sleeve.

[0011] In one embodiment, the sleeve is provided with a second forming hole that passes through the inside and outside, and the wing includes a connecting portion and an outward-turned portion. At least part of the structure of the connecting portion is located in the second forming hole to fit the connector and is connected to the hole wall of the second forming hole, and the outward-turned portion is connected to the connecting portion and turned outward relative to the connecting portion.

[0012] In one embodiment, the limiting sleeve further includes a tail cylinder, the tail cylinder is connected to the end of the sleeve body, and the outer diameter of the tail cylinder is greater than the outer diameter of the sleeve body;

[0013] Along the axial direction of the plug-in terminal, the tail cylinder and the clamping wing are respectively used to abut against two opposite sides of the clamping portion.

[0014] On the other hand, the present application further provides an electrical connection structure, which includes an insulator and the plug-in terminal as described above, wherein the plug-in terminal is inserted through the insulator.

[0015] In one of the embodiments, the insulator is provided with a mounting hole, the inner wall of the mounting hole is protruded with a clamping portion, and the plug-in terminal passes through the mounting hole and is clamped with the clamping portion.

[0016] In the above-mentioned plug-in terminal, the locking arm is connected to the sleeve and snapped into the fixing hole, so that the sleeve and the plug-in can be relatively fixed. The clamping wing is connected to the outer circumferential wall of the sleeve and turned out relative to the sleeve. The side of the clamping wing facing away from the plug-in end is used to abut the clamping part. Therefore, the sleeve and the clamping part can be fixed by the clamping wing, thereby improving the position stability of the plug-in terminal. It can be understood that the plug-in end of the plug-in part is used for plug-in, so the side of the clamping wing facing away from the plug-in end is set to abut against the clamping part, which can reduce the probability of the plug-in part loosening or falling off due to the reaction force of the plug-in end. That is, it improves the position stability of the plug-in terminal during use. In addition, compared with the fixing method of interference fit, the fixing method of abutment limit is more stable. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A schematic cross-sectional view of an electrical connection structure provided by an embodiment of the present application in one direction.

[0018] Figure 2 This is an axial schematic diagram of a plug-in terminal provided in an embodiment of the present application.

[0019] Figure 3 for Figure 2 An exploded view of the plug-in terminal is shown.

[0020] Figure 4 forFigure 2 Top view of the mating terminal shown

[0021] Figure 5 is Figure 4 Cross-sectional view of the mating terminal shown along line A-A

[0022] Figure 6 is Figure 5 Cross-sectional view of the limiting sleeve in the mating terminal shown

[0023] Reference numerals: 1, electrical connection structure; 10, mating terminal; 100, connector; 101, mating end; 110, fixing hole; 120, positioning hole; 200, limiting sleeve; 210, sleeve body; 211, first forming hole; 212, second forming hole; 213, avoidance notch; 220, locking arm; 230, clamping fin; 231, connecting portion; 232, outward turning portion; 240, positioning piece; 250, tail cylinder; 20, insulator; 21, mounting hole; 22, clamping portion; 30, retaining disc; O, axis Detailed implementation manners

[0024] To make the above objects, features, and advantages of the present application more obvious and understandable, the following will describe the detailed implementation manners of the present application in conjunction with the accompanying drawings. Many specific details are set forth in the following description in order to fully understand 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 departing from the connotation of the present application. Therefore, the present application is not limited by the specific embodiments disclosed below

[0025] In the description of the present application, it should be understood that if there appear these terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., the orientation or positional relationship indicated by these terms is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present application

[0026] In addition, if there appear these terms "first", "second", these terms are only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first", "second" may explicitly or implicitly include at least one of such features. In the description of the present application, if there appears the term "plurality", the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise specifically and definitely defined

[0027] In this application, unless otherwise clearly defined and limited, if terms such as "installed", "connected", "linked", "fixed", etc. appear, these terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components or the interaction relationship between two components, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0028] In this application, unless otherwise clearly defined and limited, if there is a description such as a first feature being "on" or "under" a second feature, its meaning can be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature can be that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "underneath" the second feature can be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.

[0029] It should be noted that if an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or there can also be an intermediate element. If an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element at the same time. If so, the terms "vertical", "horizontal", "up", "down", "left", "right" and similar expressions used in this application are only for the purpose of illustration and do not represent the only implementation.

[0030] Please refer to Figure 1 and Figure 2 , an embodiment of the present application provides an electrical connection structure 1. The electrical connection structure 1 includes a mating terminal 10 and an insulator 20, and the mating terminal 10 is inserted through the insulator 20. The electrical connection structure 1 can be used as a male end in an electrical connector, or the electrical connection structure 1 can be used as a female end in an electrical connector. When the electrical connection structure 1 is used as a male end, the mating terminal 10 can be configured as a pin element. When the electrical connection structure 1 is used as a female end, the mating terminal 10 can be configured as a jack element. For ease of understanding and explanation, in each embodiment and the accompanying drawings of the specification, the mating terminal 10 is taken as an example of a pin element for illustration and display. However, in each embodiment of the present application, it is not limited whether the mating terminal 10 is mated as a pin element or as a jack element, and it can be adjusted according to actual needs.

[0031] Furthermore, the plug-in terminal 10 can be snap-fitted with the insulator 20 to achieve stable fixation.

[0032] See also Figures 1 to 3 In one embodiment, the plug-in terminal 10 includes a plug-in connector 100 and a limiting sleeve 200. The plug-in connector 100 is provided with a plug-in end 101 for plugging, and the plug-in connector 100 is provided with a fixing hole 110. The limiting sleeve 200 has elastic properties. The limiting sleeve 200 includes a sleeve body 210, a locking arm 220 and a clamping wing 230. The sleeve body 210 is sleeved outside the plug-in connector 100. The locking arm 220 is connected to the sleeve body 210 and is clamped into the fixing hole 110 to fix the sleeve body 210 and the plug-in connector 100. The clamping wing 230 is connected to the outer circumferential wall of the sleeve body 210 and is turned outward relative to the sleeve body 210. The side of the clamping wing 230 away from the plug-in end 101 is used to abut the clamping portion 22.

[0033] In the above-mentioned plug-in terminal 10, the locking arm 220 is connected to the sleeve 210 and is inserted into the fixing hole 110, so that the sleeve 210 and the plug-in connector 100 can be relatively fixed. The clamping wing 230 is connected to the outer circumferential wall of the sleeve 210 and is turned outward relative to the sleeve 210. The side of the clamping wing 230 away from the plug-in end 101 is used to abut the clamping portion 22. Therefore, the sleeve 210 and the clamping portion 22 can be fixed by the clamping wing 230, thereby improving the position stability of the plug-in terminal 10. It can be understood that the plug-in end 101 of the plug-in connector 100 is used for plugging. Therefore, the side of the clamping wing 230 away from the plug-in end 101 is set to abut the clamping portion 22, which can reduce the probability of the plug-in connector 100 being retreated by the reaction force of the plug-in end 101, resulting in the loosening and falling off of the plug-in terminal 10, that is, the position stability of the plug-in terminal 10 during use is improved. Moreover, compared with the fixing method of interference fit, the fixing method of abutment limit is more stable.

[0034] See also Figure 1 In one embodiment, the insulator 20 is provided with a mounting hole 21, and a clamping portion 22 is protruded from the inner wall of the mounting hole 21. The plug-in terminal 10 passes through the mounting hole 21 and is clamped with the clamping portion 22. Since the limiting sleeve 200 is elastic, the clamping wing 230 is compressed and can be temporarily in an inward state during the process of the plug-in terminal 10 passing through the mounting hole 21. When the plug-in terminal 10 is inserted to the expected position, the compression effect of the hole wall of the mounting hole 21 is lost, and the clamping wing 230 can be expanded to clamp with the clamping portion 22.

[0035] It should be noted that the connector 100 is used for plugging. To ensure a good electrical connection effect, the connector 100 usually needs to have good electrical conductivity. Therefore, it is usually difficult for the connector 100 to have both good elasticity and support. Thus, in this application, the limit sleeve 200 is provided separately from the connector 100, and the two can be independent of each other, so that different materials can be used to make the limit sleeve 200 meet the requirements of elasticity and support, while the connector 100 can meet the good electrical conductivity effect. Moreover, by providing the clamping wings 230 on the limit sleeve 200 instead of the connector 100, the weakening of the structural strength of the connector 100 can be reduced, which is convenient for plugging.

[0036] Furthermore, the connector 100 can be made of high-precision phosphor bronze. The limit sleeve can be made of SUS304 stainless steel.

[0037] Please refer to Figure 2 and Figure 3 , in one embodiment, the locking arm 220 extends around the circumferential direction of the limit sleeve 200 to embrace the outer periphery of the connector 100, and the free end of the locking arm 220 is bent and snapped into the fixing hole 110. Since the locking arm 220 not only snaps into the fixing hole 110, but also embraces the outer periphery of the connector 100, there is also a relatively large contact area between the locking arm 220 and the connector 100, which can improve the stability of the fixation of the locking arm 220. It should be noted that the accompanying drawings of the specification only show the part where the locking arm 220 embraces the outer periphery of the connector 100, and do not show the part where the locking arm 220 is bent and snapped into the fixing hole 110.

[0038] Furthermore, the number of the locking arms 220 is at least two. The free ends of at least two locking arms 220 are arranged oppositely and are bent and snapped into the fixing hole 110 to respectively abut against two opposite hole walls of the fixing hole 110. Thus, the locking arm 220 can not only limit the position of the limit sleeve 200 relative to the connector 100 in the axial direction O of the connector 100, but also limit the position of the limit sleeve 200 relative to the connector 100 in the circumferential direction of the connector 100. In short, the locking arm 220 can limit the axial sliding and circumferential rotation of the limit sleeve 200.

[0039] Furthermore, taking two locking arms 220 as an example. As Figure 3As shown, an avoidance notch 213 is provided on the outer periphery of one end of the sleeve body 210 facing away from the insertion end 101. Two locking arms 220 are respectively connected to two opposite groove walls of the avoidance notch 213, such that the free ends of the two locking arms 220 are arranged oppositely. Moreover, both of the two locking arms 220 extend along the circumferential direction of the limiting sleeve 200, such that the two locking arms 220 are approximately like embracing arms to hold the plug-in member 100. One end of the two locking arms 220 away from the avoidance notch 213 is the free end, and this free end can be bent to enter the fixing hole 110 on the plug-in member 100, so that the limiting sleeve 200 is fixed relative to the plug-in member 100. It can be understood that along the radial direction of the plug-in member 100, the projection of the avoidance notch 213 on the outer periphery of the plug-in member 100 can cover the fixing hole 110.

[0040] In one embodiment, the locking arm 220 can be integrally provided with the sleeve body 210, and it can be set that the locking arm 220 itself is a part of the sleeve body 210. In this embodiment, the sleeve body 210 can be directly cut to form the embracing locking arms 220. With such a setting, the processing is simple and convenient.

[0041] Please refer to Figure 4 and Figure 5 , in one embodiment, a positioning hole 120 is provided on the outer periphery of the plug-in member 100. The sleeve body 210 has an elastic property, and a positioning piece 240 is formed by inverting a region of the sleeve body 210. The positioning piece 240 is clamped with the positioning hole 120, so that the limiting sleeve 200 can be positioned with the plug-in member 100. It can be understood that the locking arms 220 hold the outside of the plug-in member 100, and the free ends of the locking arms 220 are bent and clamped into the fixing hole 110. During actual production and processing, in order to improve the fixing effect of the locking arms 220, usually after the limiting sleeve 200 and the plug-in member 100 are inserted in place, the free ends of the locking arms 220 are bent to be clamped into the fixing hole 110, so that the locking arms 220 can have more dimensions for being clamped into the fixing hole 110, and the dimensions of this bent part will not be stuck and interfere with the plug-in member 100 during installation. At this time, since the locking arms 220 have not been clamped into the fixing hole 110 when the limiting sleeve 200 and the plug-in member 100 are initially positioned, the positioning piece 240 can play a positioning role.

[0042] Moreover, the positioning piece 240 can also provide feedback to facilitate knowing whether the limiting sleeve 200 and the plug-in member 100 are installed in place. The sleeve body 210 has an elastic property. When the limiting sleeve 200 and the plug-in member 100 have not been inserted in place, the positioning piece 240 has not been clamped into the positioning hole 120, and the positioning piece 240 abuts against the outer periphery of the plug-in member 100. When the limiting sleeve 200 and the plug-in member 100 are inserted in place, at this time, the positioning piece 240 is clamped into the positioning hole 120, which will have a force feedback and a sound feedback, enabling the operator to know that the limiting sleeve 200 and the plug-in member 100 are inserted in place.

[0043] Please refer to Figure 5 , in one embodiment, the sleeve body 210 is provided with a first forming hole 211. One side of the positioning piece 240 is connected to the hole wall of the first forming hole 211, and the other side is turned inward relative to the sleeve body 210. In this embodiment, the positioning piece 240 itself can be a part of the sleeve body 210. By cutting a C-shaped slit in a specified area on the outer periphery of the sleeve body 210, the positioning piece 240 is formed, and one side edge of the positioning piece 240 is still connected to the sleeve body 210. With such a setting, the processing is simple and convenient. Moreover, compared with directly stamping or riveting an inward-turning structure on the outer periphery of the sleeve body 210, in this embodiment, only one side edge of the positioning piece 240 is connected to the sleeve body 210, enabling the positioning piece 240 to have a larger elastic movement space.

[0044] Please refer to Figures 3 to 6 , similarly, in one embodiment, the sleeve body 210 is provided with a second forming hole 212 that penetrates inside and outside. One side of the clamping fin 230 is connected to the hole wall of the second forming hole 212, and the other side is turned outward. The clamping fin 230 itself can be a part of the sleeve body 210. By cutting a C-shaped slit in a specified area on the outer periphery of the sleeve body 210, the clamping fin 230 is formed, and one side edge of the clamping fin 230 is still connected to the sleeve body 210. With such a setting, the processing is simple and convenient. Moreover, in this embodiment, only one side edge of the clamping fin 230 is connected to the sleeve body 210, enabling the clamping fin 230 to have a larger elastic movement space.

[0045] Please refer to Figure 5 , in one embodiment, the clamping fin 230 includes a connecting portion 231 and an outward-turning portion 232. At least part of the structure of the connecting portion 231 is located inside the second forming hole 212 to fit the plug-in member 100 and be connected to the hole wall of the second forming hole 212, so as to improve the position stability of the clamping fin 230. The outward-turning portion 232 is connected to the connecting portion 231 and turns outward relative to the connecting portion 231.

[0046] Furthermore, the clamping fin 230 can be arranged to extend along the axis O of the mating terminal 10. Along the axis O of the mating terminal 10, from the end close to the connecting portion 231 to the end far from the connecting portion 231, the outward-turning portion 232 gradually turns outward in the radial direction.

[0047] Please refer to Figure 3 , in one embodiment, the number of the clamping fins 230 is multiple, and the multiple clamping fins 230 are arranged at intervals along the circumferential direction of the limiting sleeve 200 to improve the limiting effect.

[0048] Please refer to Figure 1 and Figure 6, in one embodiment, the limit sleeve 200 further includes a tail cylinder 250. The tail cylinder 250 is connected to the end of the sleeve body 210, and the outer diameter of the tail cylinder 250 is greater than that of the sleeve body 210. Along the axis O direction of the mating terminal 10, the tail cylinder 250 and the clamping fins 230 are respectively used to abut against opposite sides of the clamping portion 22. With such a setting, by the tail cylinder 250 and the clamping fins 230 abutting against the clamping portion 22 in opposite directions, the position stability of the mating terminal 10 can be further improved. That is to say, not only can the backward movement of the mating terminal 10 be reduced by the clamping fins 230 abutting against the clamping portion 22, but also the probability of the mating terminal 10 extending out can be reduced by the tail cylinder 250 abutting against the clamping portion 22.

[0049] Of course, in other embodiments, it is not limited to setting the tail cylinder 250 and the clamping fins 230 to cooperate to jointly define the axial position of the mating terminal 10. For example, the electrical connection structure 1 further includes a retaining disc 30. The retaining disc 30 is disposed outside the insulator 20, and the retaining disc 30 and the plugging end 101 are located at the same end of the insulator 20. Combining Figure 1 , it is also possible to set the end of the limit sleeve 200 to abut against the retaining disc 30 to limit the extension of the mating terminal 10.

[0050] In one embodiment, regarding the processing and assembly of the mating terminal 10, since the clamping fins 230, the positioning piece 240, and the locking arm 220 can all be part of the sleeve body 210 and are obtained by processing the sleeve body 210. Therefore, a plate-shaped workpiece can be stamped to cut and form the shapes of the clamping fins 230, the positioning piece 240, and the locking arm 220, and then formed into a hollow tube by rounding. By using the stamping method for processing, the processing is convenient and the product consistency is high. Further, the connector 100 can also be obtained by stamping.

[0051] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity of description, 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, it should be considered as within the scope described in this specification.

[0052] The above-described embodiments only represent several implementation manners of the present application. Their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the patent application. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present application, several deformations and improvements can be made, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application should be subject to the appended claims.

Claims

1. A butt terminal, characterized in that, The plug-in terminal comprises: A plug connector, wherein the plug connector is provided with a plug end for plugging, and the plug connector is provided with a fixing hole; The limiting sleeve has elastic properties and includes a sleeve body, a locking arm and a clamping wing. The sleeve body is sleeved outside the connector. The locking arm is connected to the sleeve body and is clamped into the fixing hole to fix the sleeve body and the connector. The clamping wing is connected to the outer circumferential wall of the sleeve body and is turned outward relative to the sleeve body. The side of the clamping wing facing away from the plug end is used to abut the clamping part.

2. The butt terminal according to claim 1, wherein The locking arm is extended around the circumferential direction of the limiting sleeve to embrace the outer circumference of the plug-in component, and the free end of the locking arm is bent and inserted into the fixing hole.

3. The butt terminal according to claim 2, characterized in that, The number of the locking arms is at least two, and the free ends of at least two locking arms are arranged opposite to each other and bent to be inserted into the fixing hole so as to respectively abut against two hole walls of the fixing hole arranged opposite to each other.

4. The butt terminal according to claim 1, characterized in that, A positioning hole is provided on the outer periphery of the plug connector. The sleeve has elastic properties. An area of the sleeve is inverted to form a positioning piece, and the positioning piece is engaged with the positioning hole.

5. The butt terminal according to claim 4, characterized in that, The sleeve body is provided with a first forming hole, one side of the positioning piece is connected to the hole wall of the first forming hole, and the other side is turned inside out relative to the sleeve body.

6. The butt terminal according to claim 1, wherein The number of the clamping wings is multiple, and the multiple clamping wings are arranged at intervals along the circumferential direction of the limiting sleeve.

7. The butt terminal according to claim 1, characterized in that, The sleeve body is provided with a second forming hole that passes through the inside and outside, and the clamping wing includes a connecting portion and an outward-turned portion. At least part of the structure of the connecting portion is located in the second forming hole to fit the connector and is connected to the hole wall of the second forming hole. The outward-turned portion is connected to the connecting portion and turned outward relative to the connecting portion.

8. The butt terminal according to claim 1, wherein The limiting sleeve also includes a tail cylinder, which is connected to the end of the sleeve body, and the outer diameter of the tail cylinder is greater than the outer diameter of the sleeve body; Along the axial direction of the plug-in terminal, the tail cylinder and the clamping wing are respectively used to abut against two opposite sides of the clamping portion.

9. An electrical connection structure, characterized in that, The electrical connection structure includes an insulator and a plug-in terminal according to any one of claims 1 to 8, wherein the plug-in terminal is inserted through the insulator.

10. The electrical connection structure according to claim 9, wherein The insulator is provided with a mounting hole, the inner wall of the mounting hole is protruded with a clamping portion, and the plug-in terminal passes through the mounting hole and is clamped with the clamping portion.

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