An electrical connection terminal

Abstract

The application provides an electric connection terminal, which comprises a seat body, an elastic piece, a sheath and a plurality of conductive sheets, the first end of the sheath is fixedly connected with the seat body, the second end of the sheath is provided with an opening, the elastic piece and the conductive sheets are both installed in the sheath, the conductive sheets are arranged in intervals along the circumference of the sheath and surround a slot, the slot is communicated with the opening, the slot is used for inserting a pin, the conductive sheets are movably connected with the seat body and form a conduction, the elastic piece is located between the sheath and the conductive sheets, and the elastic piece is used for pressing the conductive sheets against the circumference of the seat body and / or the pin; the electric connection terminal has the advantages of reasonable structure and large current bearing.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of connecting pieces, and particularly relates to an electric connecting terminal. BACKGROUND

[0002] The electric connecting terminal is a connecting piece commonly used in civil, commercial and industrial fields. For example, the socket (female plug or female end) commonly seen in daily life is an electric connecting terminal. By inserting a plug (male plug or male end) that matches the socket into the socket, a non-permanent conductive connection between the power supply end and the power consumption end can be formed. Specifically, the electric connecting terminal can be used to supply electric energy to an airplane before takeoff, to form an electric connection between a power battery pack and an electric device (electric control, motor) in an electric vehicle, or to supply electric energy to a ship from land after the ship docks. In the above-mentioned application scenarios, the electric connecting terminal often needs to carry a large current of hundreds or even thousands of amperes. However, the current electric connecting terminal (female end) used to carry a large current must have a thick wall to meet the design requirements of the current carrying area. As a result, the contact wall of the female plug and the male plug is rigid and has no elasticity. When the female plug and the male plug are inserted, the female plug cannot have good contact. To solve this problem, a crown spring is often installed in the inner cavity of the female plug to ensure that the female plug and the male plug have good contact when they are inserted. For example, a combined double-crown spring electric connecting structure is disclosed in application No. 202110454139.3. However, this structure has the following problems. First, the cross-sectional area of the crown spring is too small, and the resistance value is relatively large. The crown spring is prone to generate heat during use. Thus, the electric connecting terminal carrying an even larger current is prone to damage due to overheating. Second, the material matching of the electric connecting terminal is relatively difficult. For example, red copper, also known as pure copper, has very good electrical conductivity but poor elasticity (relatively soft texture). Thus, the design of the female plug insertion wall cannot be too thick to affect the elasticity. That is, the female plug cannot form good contact with the male plug and is also prone to heat generation due to poor elasticity. Alternatively, in order to ensure elasticity, the cross-sectional area of the female plug through which the current passes is relatively small and cannot carry a large current. Phosphor copper or beryllium copper has good elasticity but relatively poor electrical conductivity. Thus, when the current carrying area of the female plug insertion wall carrying a large current increases, the rigidity of the female plug insertion wall also increases and affects the elasticity. Similarly, phosphor copper or beryllium copper has relatively poor electrical conductivity or relatively high resistivity, which also causes the electric connecting terminal to easily generate heat when a large current is used. In summary, in the prior art, the elastic force of the conductive material (to ensure the close contact between the female end and the male end to ensure good conduction) and the electrical conductivity are contradictory. That is, the material with good elasticity has poor electrical conductivity. In order to ensure the elasticity of the material, the cross-sectional area of the material is small, which becomes the bottleneck of the electric connecting terminal carrying a large current. The above-mentioned problems need to be further improved. SUMMARY

[0003] Therefore, the present application aims to provide an electric connection terminal with reasonable structure and large current carrying capacity.

[0004] To solve the above technical problems, the technical solution used by the present application is:

[0005] An electric connection terminal comprises a seat body, an elastic member, a sheath and a plurality of conductive pieces, the first end of the sheath is fixedly connected with the seat body, the second end of the sheath is provided with an opening, the elastic member and the conductive pieces are both installed in the sheath, the conductive pieces are arranged in intervals along the circumference of the sheath and surround a slot, the slot is communicated with the opening, the slot is used for inserting a pin, the conductive pieces are movably connected with the seat body and form a conduction, the elastic member is located between the sheath and the conductive pieces, and the elastic member is used for pressing the conductive pieces against the seat body and / or the circumferential side of the pin.

[0006] As a further improvement to the electric connection terminal, one end of the seat body is further provided with a connecting part, the first end of the connecting part is connected with the seat body relative to the axial direction of the seat body, and the second end of the connecting part extends away from the seat body.

[0007] A first contact surface is formed on the connecting part along the circumference thereof, the first contact surface is in contact with the conductive pieces and forms a conduction.

[0008] As a further improvement to the electric connection terminal, the diameter of the connecting part is smaller than the diameter of the seat body, and a first limiting part is formed on the end surface of the seat body relative to the radial direction of the connecting part, the part of the seat body higher than the connecting part forms the first limiting part, and the first limiting part is used for restricting the movement of the conductive pieces relative to the axial direction of the seat body.

[0009] As a further improvement to the electric connection terminal, a flange is further provided at the second end of the connecting part, the diameter of the flange is larger than the diameter of the connecting part and forms a second limiting part, and the first contact surface is located between the second limiting part and the first limiting part.

[0010] As a further improvement to the electric connection terminal, a bending part is further provided at the opening of the sheath, the bending part is connected with the sheath, and the bending part is bent inwardly into the sheath and forms a first limiting groove.

[0011] As a further improvement to the electric connection terminal, the conductive piece comprises a body and a contact head, the contact head is connected at the first end of the body, the contact head abuts against the first contact surface of the connecting part, and the second end of the body is clamped in the first limiting groove on the sheath.

[0012] As a further improvement of the electric connection terminal, the first contact surface is in the shape of a circular arc, and the contact head is in the shape of a circular arc that matches the first contact surface.

[0013] As a further improvement of the electric connection terminal, the elastic member comprises a first ring body and a plurality of elastic arms arranged along the circumference of the first ring body and fixedly connected to the first ring body, each of the elastic arms corresponding to each of the conductive sheets and abutting against the conductive sheets.

[0014] With respect to the radial direction of the sheath, the outer wall of the first ring body abuts against the inner wall of the sheath, and the inner wall of the first ring body is spaced apart from the conductive sheets by a preset distance.

[0015] As a further improvement of the electric connection terminal, the elastic arms are further provided with third limiting portions at both ends thereof, and the third limiting portions are fixedly connected to the elastic arms.

[0016] The body of the conductive sheet is further provided with second limiting grooves at both ends thereof that match the third limiting portions, and the third limiting portions are clamped in the second limiting grooves.

[0017] As a further improvement of the electric connection terminal, the first ring body is further provided with a plurality of partition pieces at one end or both ends thereof in the length direction, the partition pieces are arranged along the circumference of the first ring body at intervals, one end of the partition piece is fixedly connected to the first ring body, the other end extends towards the axial direction of the first ring body, and the partition pieces are arranged between adjacent two conductive sheets in sequence.

[0018] Alternatively, the elastic member is further provided with a second ring body, the first ring body is sleeved and fixed outside the second ring body, the second ring body is further provided with a plurality of partition pieces at one end or both ends thereof, the partition pieces are arranged along the circumference of the second ring body at intervals, one end of the partition piece is fixedly connected to the second ring body, the other end extends towards the axial direction of the first ring body or the second ring body, and the partition pieces are arranged between adjacent two conductive sheets in sequence.

[0019] As a further improvement of the electric connection terminal, the seat body and the conductive sheet are both made of pure copper material.

[0020] As a further improvement of the electric connection terminal, the insertion slot is further provided with a protruding portion along the circumference thereof, the protruding portion is used to form a contact surface with the insertion pin, with respect to the axial direction of the sheath, the diameter of the insertion slot gradually increases from the protruding portion to the seat body, and the diameter of the insertion slot gradually increases from the protruding portion to the opening.

[0021] The beneficial effects of the present application relative to the prior art mainly lie in that the current-carrying conductive sheet is movably connected with the seat body, and a sheath and an elastic member are arranged outside the conductive sheet and cooperated with the conductive sheet, so that the elastic pre-tightening force is provided for the close connection between the conductive sheet and the seat body and the close connection between the conductive sheet and the inserted pin; further, after the conductive sheet and the seat body are separated, pure copper can be used as the seat body and the conductive sheet without considering the elasticity of the pure copper material, so that the cross-sectional area of the terminal through which the current passes cannot meet the requirement, and the carrying capacity of the electric connection terminal for large current is improved. BRIEF DESCRIPTION OF DRAWINGS

[0022] The above and other objects, features and advantages of the present application will become more apparent from the following detailed description when taken in conjunction with the accompanying drawings in which preferred embodiments of the present application are shown by way of illustrative example. Like reference numerals in the drawings denote like elements, and the drawings are not necessarily drawn to scale, with emphasis being placed upon illustrating the principles of the present application.

[0023] Figure 1 It is a schematic diagram of the overall structure of the electric connection terminal in the present application;

[0024] Figure 2 It is a schematic diagram of the sectional structure of the electric connection terminal in the present application;

[0025] Figure 3 It is a schematic diagram of the sectional structure of another embodiment of the electric connection terminal in the present application;

[0026] Figure 4 It is a schematic diagram of the structure of the conductive sheet in the present application;

[0027] Figure 5 It is a schematic diagram of the structure of another embodiment of the conductive sheet in the present application;

[0028] Figure 6 It is a schematic diagram of the structure of the electric connection terminal in the present application. DETAILED DESCRIPTION

[0029] The technical solutions of the present application will be further described in detail below in combination with the drawings and specific embodiments, so that those skilled in the art can better understand the present application and implement it, but the embodiments are not limiting to the present application. In the embodiments, it should be understood that the terms "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0030] It should be noted that when one element is considered to be "connected" to another element, it can be directly connected to and integrated with the other element, or there may be an intervening element present. The terms "mounted," "one end," "the other end," and similar expressions used in this invention are for illustrative purposes only.

[0031] like Figures 1-6 As shown, this embodiment provides an electrical connection terminal, including a base 1, an elastic element 2, a sheath 3, and multiple conductive plates 4. The first end of the sheath 3 in the axial direction is fixed to one end of the base 1 by riveting, bolting, interference fit, or welding. The other end of the base 1 is used to connect a power cable. The second end of the sheath 3 in the axial direction is provided with an opening 31. The elastic element 2 and the conductive plates 4 are both installed inside the sheath 3. The conductive plates 4 are arranged at intervals along the circumference of the sheath 3 to form a slot 41. The slot 41 is connected to the opening 31. The slot 41 is used to insert a pin (plug, male). That is, the pin is inserted through the opening of the sheath 3 and enters the slot 41 formed by the conductive plates 4, thereby making the conductive plates 4 and the pin conductive. Furthermore, the first end of the conductive sheet 4 is movably connected to or abuts against the base 1 to form a conductive connection. The elastic element 2 also forms a ring around the circumference of the sheath 3, and is located between the sheath 3 and the conductive sheet 4. The elastic element 2 is used to press the conductive sheet against the circumference of the base 1 and / or the pin. The sheath 3 and the base 1 cooperate to constrain the conductive sheet 4 within the sheath 3, and the conductive sheet 4 undergoes a certain displacement within the sheath 3 relative to the radial direction of the sheath 3; in other words, the conductive sheet 4 swings at a certain angle with its connection point with the base 1 as a reference point. In this embodiment, both the base 1 and the conductive sheet 4 are made of pure copper. Specifically, the current-carrying conductive plate 4 is movably connected to the base 1 (non-fixed connection). At the same time, a sheath 3 and an elastic element 2 are provided on the outside of the conductive plate 4 to cooperate with it. The elastic element 2 provides elastic pre-tightening force for the tight connection between the conductive plate 4 and the base 1 and the tight connection between the conductive plate 4 and the inserted pin. When the conductive plate 4 and the base 1 are separated, pure copper can be used as the base 1 and the conductive plate 4 without considering the elasticity of the pure copper material. However, the cross-sectional area of ​​the current-carrying terminal cannot meet the requirements. That is, the electrical connection terminal can meet the elastic pre-tightening force requirement of the conductive plate 4 relative to the pin without reducing the cross-sectional area of ​​the electrical connection terminal that can carry a large current.

[0032] like Figures 2-6As shown, in the preferred embodiment, one end of the seat body 1 is further provided with a connecting portion 11, the first end of the connecting portion 11 is integrally formed with the seat body 1 relative to the axial direction of the seat body 1, and the second end of the connecting portion 11 extends away from the seat body 1; wherein a first contact surface 12 is formed on the connecting portion 11 along the circumferential direction thereof, the first contact surface 12 is in contact with the conductive sheet 4 and forms a conduction. Further, the diameter of the connecting portion 11 is smaller than the diameter of the seat body 1, and relative to the radial direction of the connecting portion 11, the part of the end surface of the seat body 1 that is higher than the connecting portion 11 forms a first limiting portion 13, which is used to constrain the conductive sheet 4 from moving relative to the axial direction of the seat body 1. Specifically, since the conductive sheet 4 is movably connected with the seat body 1, when the pin is inserted from the opening 31 of the sheath 3, an axial pushing force will be generated on the conductive sheet 4 and the conductive sheet 4 will move, and the first limiting portion 13 can avoid the conductive sheet 4 from sliding relative to the seat body 1 or the sheath 3. Further, the second end of the connecting portion 11 is further provided with a flange, the diameter of the flange is greater than the diameter of the connecting portion 11 or the diameter of the flange is greater than the diameter of the first contact surface 12 and forms a second limiting portion 14, the first contact surface 12 is located between the second limiting portion 14 and the first limiting portion 13, and for the same reason, when the pin is pulled out from the insertion slot 41, an axial force will also be generated on the conductive sheet 4 and the conductive sheet 4 will slide, and the second limiting portion 14 can eliminate this problem.

[0033] As Figure 2 , 3,6, in the preferred embodiment, the opening 31 of the sheath 3 is further provided with a bending portion 32, the bending portion 32 is connected with the sheath 3, and the bending portion 32 is bent inwardly to the sheath 3 and forms a first limiting groove 33. Further, the conductive sheet 4 includes a body 41 and a contact head 42, the contact head 42 is connected at the first end of the body 41 in an integral forming manner, and the contact head 42 abuts against the first contact surface 12 of the connecting portion 11, and the second end of the body 41 is clamped in the first limiting groove 33 on the sheath 3. Specifically, one end of the conductive sheet 4 is movably connected with the seat body 1, and the other end is located at the opening of the sheath 3 (so that the end of the conductive sheet 4 away from the seat body 1 forms a free end), therefore, under the elastic force of the elastic member 2, the free end of the conductive sheet 4 will be excessively contracted to the center of the sheath 3, and then affect the smooth insertion of the electric connection terminal and the pin (male plug); therefore, the first limiting groove 33 formed by the bending portion 32 can limit the contraction amount of the conductive sheet 4 to the center of the sheath 3, or in other words, limit the swing amount of the free end of the conductive sheet 4 relative to the radial direction of the sheath 3. Further, the insertion slot 41 surrounded by the plurality of conductive sheets 4 is circular, and the inner wall of the insertion slot 41 is further provided with a protruding portion 44 along the circumferential direction thereof, or in other words, the protruding portion 44 is provided on the conductive sheet 4, and the protruding portion in the embodiment is integrally formed with the conductive sheet 4. Further, the protruding portion 44 is used to form a contact surface with the pin, and the diameter of the insertion slot 41 from the protruding portion 44 to the seat body 1 gradually increases relative to the axial direction of the sheath 3, and the diameter of the insertion slot 41 from the protruding portion 44 to the opening 31 gradually increases or in other words, the diameter gradually increases in a smooth manner. Specifically, the diameter of the insertion slot 41 from the protruding portion 44 to the opening 31 gradually increases (horn mouth or guiding mouth), which can facilitate the smooth insertion of the pin and the electric connection terminal. Secondly, since the conductive sheet 4 is movably connected with the seat body 1, after the diameter of the insertion slot 41 from the protruding portion 44 to the seat body 1 gradually increases, and the diameter of the pin will necessarily be slightly larger than the diameter of the protruding portion 44 in the insertion slot 41, when the pin is inserted into the insertion slot 41, the contact head 42 on the conductive sheet 4 can only swing at a certain angle with the first contact surface 12 on the seat body 1 as the fulcrum, and then ensure the reliable contact and conduction of the conductive sheet 4 and the seat body 1; further, if the diameter of the insertion slot 41 from the protruding portion 44 to the seat body 1 is unchanged, when the pin is inserted, it may lead to the movement of the contact head 42 relative to the radial direction of the sheath 3, that is, it may cause the contact head 42 to move away from the first contact surface on the seat body 1, and then cause poor contact.

[0034] As Figures 2-5As shown, in a preferred embodiment, the first contact surface 12 is arc-shaped, and the contact head 42 is arc-shaped to cooperate with the first contact surface 12. Specifically, as the pin is inserted or removed, the conductive sheet 4 swings at a certain angle with the contact head 42 and the first contact surface 12 on the connecting part 11 as the base point, or the main body 41 of the conductive sheet 4 swings at a certain angle relative to the axis of the sheath 3. The arc-shaped first contact surface 12 and the contact head 42 can ensure reliable or tight contact between the conductive sheet 4 and the base 1, that is, ensure reliable current flow between the conductive sheet 4 and the base 1. Of course, the first contact surface 12 and the contact head 42 can also be flat, that is, when the pin (male) is inserted into the electrical connection terminal, the first contact surface 12 and the contact head 42 form surface contact, thereby ensuring smooth current flow.

[0035] like Figure 6 As shown, in a preferred embodiment, the elastic element 2 includes a first ring body 21 and a plurality of elastic arms 22. The elastic arms 22 are arranged circumferentially along the first ring body 21 and are integrally formed with the first ring body 21. Each elastic arm 22 corresponds to each conductive sheet 4 and abuts against the conductive sheet 4. That is, the number of elastic arms 22 is the same as the number of conductive sheets 4, so that each conductive sheet 4 can participate in bearing force, thereby further ensuring reliable contact between the conductive sheet 4 and the seat body 1 and the pin. Furthermore, relative to the radial direction of the sheath 3, the outer wall of the first ring 21 abuts against the inner wall of the sheath 3, while the elastic arm 22 bends or extends towards the axis of the sheath 3. The inner wall of the first ring 21 is spaced a predetermined distance from the conductive sheet 4. Since the diameter of the pin is often slightly larger than the diameter of the slot 41 formed by the conductive sheet 4, when the pin is inserted, it forces the second end of the conductive sheet 4 to move radially towards the inner wall of the sheath 3. Therefore, a corresponding space needs to be reserved inside the sheath 3. Furthermore, the elastic element 2 can be made of steel to ensure reliable contact between the conductive sheet 4 and the pin, and between the conductive sheet 4 and the base.

[0036] like Figure 6 As shown, in a preferred embodiment, a third limiting part 23 is provided at both ends of the elastic arm 22, and the third limiting part is integrally formed with the elastic arm 22; a second limiting groove 43 that cooperates with the third limiting part 23 is provided at both ends of the body 41 of the conductive sheet 4, and the third limiting part 23 is held in the second limiting groove 43. The provided third limiting part 23 and the provided second limiting groove 43 that cooperate with it on the conductive sheet 4 can make the elastic member 2 and the conductive sheet 4 reliably fixed, thereby controlling the axial movement distance between the conductive sheet 4 and the elastic member 2 due to the insertion and removal of the pin within a specified range.

[0037] like Figure 6As shown, in the preferred embodiment, a plurality of partitions 25 are further arranged at one or both ends of the first ring body 21 in the length direction, the partitions 25 are arranged at intervals along the circumference of the first ring body 21, one end of the partition 25 is fixedly connected with the first ring body 21, the other end extends towards the axial direction of the first ring body 21, and the partitions 25 are sequentially arranged between two adjacent conductive sheets 4. In another embodiment, the elastic member 2 is further provided with a second ring body 24, the first ring body 21 is sleeved and fixed on the outside of the second ring body 24, a plurality of partitions 25 are further arranged at one or both ends of the second ring body 24, the partitions 25 are arranged at intervals along the circumference of the second ring body 24, one end of the partition 25 is integrally formed with the second ring body 24, the other end extends or bends towards the axial direction of the first ring body 21 or the second ring body 24, and the partitions 25 are sequentially arranged between two adjacent conductive sheets 4. The partitions 25 can keep the distance between two adjacent conductive sheets 4 consistent, that is, the conductive sheets 4 can uniformly surround the periphery of the pin (male) after the pin is inserted.

[0038] The beneficial effects of the present application relative to the prior art mainly include: the conductive sheet carrying current is movably connected with the seat body, a sheath cooperating with the conductive sheet is arranged outside the conductive sheet, and an elastic member is arranged, thereby providing elastic pre-tightening force for the close connection between the conductive sheet and the seat body and the close connection between the conductive sheet and the inserted pin; further, after the conductive sheet and the seat body are separated, pure copper can be used as the seat body and the conductive sheet, without considering the elastic problem of the pure copper material, so that the cross-sectional area of the terminal through which the current passes cannot meet the requirement, thereby improving the carrying capacity of the electrical connection terminal for large current.

[0039] In this specification, unless expressly specified and limited otherwise, a first feature is "on", "above", or "under" a second feature can mean that the first and second features are in direct contact, or that the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature "above", "over", and "on" the second feature can mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in horizontal height than the second feature. The first feature "below", "under", and "under" the second feature can mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in horizontal height than the second feature.

[0040] In the description of the specification, the description using the terms "preferred embodiment", "still another embodiment", "other embodiments", "specific example" or the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the specification, the illustrative expressions of the above terms are not necessarily directed to the same embodiment or example. Also, the specific features, structures, materials or characteristics described can be combined in an appropriate manner in any one or more embodiments or examples. In addition, the person skilled in the art can combine and combine the different embodiments or examples described in the specification and the features of the different embodiments or examples, without contradiction.

[0041] Although the embodiments of the present application have been shown and described above, it is understood that the above-described embodiments are exemplary and are not to be construed as limiting the present application, and the person skilled in the art can make changes, modifications, replacements and variations to the above-described embodiments within the scope of the present application.

Claims

1. An electrical connection terminal, characterized by: The utility model provides a connector, including seat body, elastic element, sheath and a plurality of conductive sheet, the first end of sheath is fixedly connected with seat body, the second end of sheath is provided with opening, elastic element and conductive sheet are all installed in sheath, the conductive sheet is arranged along the circumference of sheath and surrounds and forms the slot, the slot is communicated with the opening, the slot is used to place the pin, the conductive sheet is movably connected with seat body and forms the conduction, elastic element is located between sheath and conductive sheet, and elastic element is used for making the conductive sheet be pressed in seat body and / or the circumferential side of pin, One end of the seat body is also provided with a connecting portion, the first end of the connecting portion is connected with the seat body with respect to the axial direction of the seat body, and the second end of the connecting portion extends away from the seat body. A first contact surface is formed on the connecting portion along the circumferential direction thereof, the first contact surface is in contact with the conductive sheet and forms a conduction. A bending portion is further provided at the opening of the sheath, the bending portion is connected with the sheath, and the bending portion is bent inwardly into the sheath and forms a first limiting groove. The conductive sheet includes a body and a contact head, the contact head is connected at the first end of the body, and the contact head abuts against the first contact surface of the connecting portion, the conductive sheet swings with the contact head and the first contact surface on the connecting portion as the fulcrum, the second end of the body is clamped in the first limiting groove on the sheath, and the first limiting groove limits the contraction amount of the conductive sheet towards the axial center of the sheath.

2. The electrical connection terminal of claim 1, wherein: The diameter of the connecting portion is smaller than the diameter of the seat body, and with respect to the radial direction of the connecting portion, a part of the end surface of the seat body that is higher than the connecting portion forms a first limiting portion, the first limiting portion is used to restrict the movement of the conductive sheet with respect to the axial direction of the seat body.

3. The electrical connection terminal of claim 2, wherein: A flange is further provided at the second end of the connecting portion, the diameter of the flange is larger than the diameter of the connecting portion and forms a second limiting portion, and the first contact surface is located between the second limiting portion and the first limiting portion.

4. The electrical connection terminal of claim 1, wherein: The first contact surface is in the shape of a circular arc, and the contact head is in the shape of a circular arc that cooperates with the first contact surface.

5. The electrical connection terminal according to any one of claims 1 to 3, characterized in that: The elastic element includes a first ring body and a plurality of elastic arms, the elastic arms are arranged along the circumferential direction of the first ring body, the elastic arms are fixedly connected with the first ring body, each of the elastic arms corresponds to each of the conductive sheets, and the elastic arms abut against the conductive sheets. With respect to the radial direction of the sheath, the outer wall of the first ring body abuts against the inner wall of the sheath, and the inner wall of the first ring body is spaced apart from the conductive sheets.

6. The electrical connection terminal of claim 5, wherein: Third limiting portions are further provided at both ends of the elastic arms, and the third limiting portions are fixedly connected with the elastic arms. Second limiting grooves that cooperate with the third limiting portions are provided at both ends of the body of the conductive sheet, and the third limiting portions are clamped in the second limiting grooves.

7. The electrical connection terminal of claim 5, wherein: The first ring body is further provided with a plurality of separators at one end or both ends in the length direction, the separators are arranged at intervals in the circumferential direction of the first ring body, one end of each separator is fixedly connected to the first ring body, the other end extends towards the axial center of the first ring body, and the separators are sequentially arranged between two adjacent conductive sheets. Alternatively, the elastic member is further provided with a second ring body, the first ring body is sleeved and fixed outside the second ring body, the second ring body is further provided with a plurality of separators at one end or both ends, the separators are arranged at intervals in the circumferential direction of the second ring body, one end of each separator is fixedly connected to the second ring body, the other end extends towards the axial center of the first ring body or the second ring body, and the separators are sequentially arranged between two adjacent conductive sheets.

8. The electrical connection terminal according to any one of claims 1 to 3, characterized in that: The seat body and the conductive sheet are both made of pure copper material.

9. The electrical connection terminal according to any one of claims 1 to 3, characterized in that: The insertion slot is further provided with a protruding portion in the circumferential direction, the protruding portion is used to form a contact surface with the insertion pin, the diameter of the insertion slot gradually increases from the protruding portion to the seat body and from the protruding portion to the opening in the axial direction of the sheath.

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