Composite high-current female terminal and connector

Abstract

The utility model discloses a composite type heavy current female terminal and connector, the composite type heavy current female terminal comprises a terminal body, a contact spring and a terminal plug, the terminal body is integrally formed by stamping and stretching technology, the terminal body comprises a connecting portion, a head portion cylinder and a tail portion crimping area, the head cylinder and the tail crimping area are respectively arranged at the front end and the rear end of the connecting part, the head cylinder is provided with an accommodating space used for installing the contact spring, and the terminal plug extends into the accommodating space from one end of the accommodating space and is used for plugging the contact spring in the accommodating space. According to the utility model, wire harness assembly can be carried out without replacing the existing crimping equipment, and the product performance is ensured while the product cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of connectors, in particular to a composite high-current female terminal and a connector. Background Art

[0002] As high-current connector applications mature, the market is shifting from a focus solely on performance to a balance of performance and cost. To meet market demand, high-current terminals have evolved from initially using a machined body with contact springs to cold-forged or stamped bodies with contact springs.

[0003] Among them, the cold heading method has certain requirements on the batch quantity for its economic benefits due to the limitation of technology, and still needs to be supplemented by machining technology, so the improvement of both economy and production capacity per unit time is not obvious enough.

[0004] Due to the limitations of traditional processes, the stamping body method can only be stamped into a wire clip form, which is not friendly to the wiring harness assembly process and requires a two-piece assembly for the right-angle terminal, affecting the current-carrying performance of the product. Utility Model Content

[0005] In view of the shortcomings of the existing technology, the first purpose of the present invention is to propose a composite high-current female terminal, which can be used for wiring harness assembly without replacing the existing crimping equipment, thereby ensuring product performance while reducing product costs.

[0006] The second purpose of the present utility model is to provide a connector.

[0007] In order to achieve the above purpose one, the utility model adopts the following technical solutions:

[0008] A composite high-current female terminal, which includes a terminal body, a contact spring and a terminal plug. The terminal body is integrally formed using a stamping and stretching process. The terminal body includes a connecting part, a head cylinder and a tail crimping area. The head cylinder and the tail crimping area are arranged at the front and rear ends of the connecting part. The head cylinder is provided with an accommodating space for installing the contact spring. The terminal plug extends into the accommodating space from one end of the accommodating space to seal the contact spring in the accommodating space.

[0009] Preferably, the head cylinder is provided with a through hole in the axial direction, the through hole forms the accommodating space, and a convex ring extending toward the accommodating space is formed on the lower side of the head cylinder by a stretching process, and the terminal plug is interference fit with the head cylinder to crimp the contact spring between the terminal plug and the convex ring.

[0010] Preferably, the head cylinder is integrally formed by a splicing process, or / and the tail crimping area is formed by a stamping and rounding process.

[0011] Preferably, a reinforcement ring is sleeved on the tail crimping area.

[0012] Preferably, a groove is axially provided on a side of the terminal plug facing the contact spring.

[0013] Preferably, the contact spring includes a first end in an annular shape, a second end opposite to the first end and in an annular shape, and a plurality of first elastic arms arranged along the circumference of the contact spring;

[0014] The two ends of the first elastic arm are respectively connected to the first end and the second end, and the inner side of the first elastic arm is provided with a first contact portion; at least one pair of adjacent first elastic arms among the plurality of first elastic arms together with the first end and the second end form a receiving space;

[0015] A second elastic arm and / or a third elastic arm is disposed in the accommodation space; the second elastic arm and the third elastic arm each include a connecting end and a free end opposite to the connecting end and suspended in the air, the connecting end of the second elastic arm being connected to the first end, the connecting end of the third elastic arm being connected to the second end, and the inner side surfaces of the free ends of the second elastic arm and the third elastic arm forming a second contact portion;

[0016] The first and second contact portions are both offset toward the central axis of the contact spring compared to the inner surfaces of the first and second ends so as to be able to contact and mate with the outer circumference of the male terminal inserted into the contact spring.

[0017] Preferably, an accommodating space is provided between any two adjacent first elastic arms, and a second elastic arm and a third elastic arm are provided in each accommodating space.

[0018] Preferably, the second elastic arm and the third elastic arm located in the same accommodating space are arranged opposite to each other and aligned in the circumferential direction of the contact spring to form an elastic arm assembly, multiple elastic arm assemblies are arranged at intervals with multiple first elastic arms and arranged along the circumferential direction of the contact spring, the spacing between any adjacent elastic arm assemblies and the first elastic arm is the same, and the widths of the first elastic arm, the second elastic arm and the third elastic arm are all the same.

[0019] Preferably, the free ends of the second elastic arm and the third elastic arm are both provided with a bent portion bent outward, the inner side surface of the bent portion forms an arc-shaped second contact portion, and the tail end of the bent portion forms a supporting end.

[0020] In order to achieve the above-mentioned second purpose, the present invention adopts the following technical solutions:

[0021] The connector comprises a male terminal and the composite high-current female terminal, wherein the male terminal extends into the accommodating space and contacts the inner ring of the contact spring.

[0022] The beneficial effects of the present invention are:

[0023] 1. The terminal body adopts one-piece stamping and stretching to reduce the number of electrical connection transfers, improve the current carrying capacity of the product, and effectively improve production efficiency and optimize product costs.

[0024] 2. The tail crimping area adopts the rounding process, which can use the universal hexagonal crimping tool for wire harness assembly, making the product convenient to use;

[0025] 3. Due to the rounded structure in the tail crimping area, its open position will cause the stamping holding force to fail to meet the standard requirements. Therefore, a reinforcing ring is installed on the outside of the tail crimping area to ensure the crimping performance.

[0026] 4. The design of the assembled terminal plug facilitates the assembly of the contact spring and avoids excessive deformation of the contact spring during the assembly process, which affects the contact performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 This is a schematic diagram of the structure of the composite high-current female terminal of the utility model;

[0028] Figure 2 yes Figure 1 Schematic diagram of the decomposition structure;

[0029] Figure 3 yes Figure 1 sectional view of

[0030] Figure 4 is a cross-sectional view of the terminal body;

[0031] Figure 5 It is a structural diagram of the terminal plug;

[0032] Figure 6 This is a schematic diagram of the structure of the contact spring of the utility model;

[0033] Figure 7 for Figure 6 sectional view of

[0034] Figure 8 This is a schematic diagram of the expansion of the contact spring of the utility model;

[0035] Figure 9 It is a schematic diagram of the arrangement of the first elastic arm, the second elastic arm and the third elastic arm of the contact spring of the present invention.

[0036] In the figure: 10, contact spring; 101, first end; 102, second end; 11, first elastic arm; 110, first contact portion; 111, raised portion; 12, second elastic arm; 120, second contact portion; 121, bent portion; 122, supporting end; 13, third elastic arm; 130, second contact portion; 131, bent portion; 132, supporting end; 20, terminal body; 21, tail crimping area; 22, head cylinder; 221, convex ring; 222, perforation; 223, arc-shaped portion; 23, connecting portion; 30, reinforcement ring; 40, terminal plug; 41, groove. DETAILED DESCRIPTION

[0037] Below, the present invention is further described in conjunction with the accompanying drawings and specific embodiments. It should be noted that, under the premise of no conflict, the various embodiments described below or the various technical features can be arbitrarily combined to form a new embodiment. Unless otherwise specified, the materials and equipment used in this embodiment can be purchased from the market. Examples of the embodiments are shown in the accompanying drawings, in which the same or similar numbers throughout represent the same or similar elements or elements with the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and cannot be understood as limiting this application.

[0038] In the description of this application, it should be understood that the terms "upper," "lower," "front," "back," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like, indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended only to facilitate the description of this application and simplify the description. They do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limiting this application. In the description of this application, "plurality" means two or more, unless otherwise specifically specified.

[0039] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "connected," "connected," and "connected" should be understood in a broad sense. For example, they may refer to a fixed connection, a connection through an intermediary medium, internal communication between two components, or an interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.

[0040] The terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned drawings are intended to cover non-exclusive inclusions. For example, a process, method, system, product or apparatus that includes a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to these processes, methods, products or apparatus.

[0041] Please refer to Figure 1-3 As shown, a composite high-current female terminal may include a terminal body 20 , a contact spring 10 and a terminal plug 40 .

[0042] Among them, the terminal body 20 is formed in one piece by a stamping and stretching process. Specifically, the terminal body 20 can be divided into three parts, namely the connecting part 23, the head cylinder 22 located at the front end of the connecting part 23, and the tail crimping area 21 located at the rear end of the connecting part 23. Among them, the head cylinder 22 is used to install the contact spring 10 to achieve electrical contact with the male terminal, and the tail crimping area 21 is used to crimp the wire harness.

[0043] The head cylinder 22 is formed using a one-piece stretching process, ensuring its integrity and dimensional accuracy. The tail crimping area 21 is formed using a stamping and rounding process, creating a circular crimping area design. This allows for convenient crimping of wires using common hexagonal crimping tools, eliminating the need for specialized jigs and machines. Overall, the terminal body 20 first uses a stretching process to integrally form the sheet-like structure of the head cylinder 22, connecting portion 23, and tail crimping area 21. This sheet-like structure is then formed into a circular tail crimping area 21 using a stamping and rounding process.

[0044] The terminal body 20 is formed by one-piece stamping and stretching, which reduces the number of electrical connection transfers, improves the current carrying capacity of the product, and can effectively improve production efficiency and optimize product costs.

[0045] Due to the rounded structure of the tail crimping area 21, the stamping holding force at the rounded area will inevitably not meet the standard requirements. Therefore, a reinforcement ring 30 is assembled outside the terminal crimping area to ensure the crimping performance of the terminal crimping area. The reinforcement ring 30 can be formed by cutting to length using standard metal tubes, or it can be made through drawing or machining processes.

[0046] Please refer to Figure 3 and 4As shown, a through hole 222 is opened axially in the head cylinder 22, and the through hole 222 forms an accommodating space. The contact spring 10 is installed in the accommodating space. In order to prevent the contact spring 10 from falling off during the plugging and unplugging of the male terminal, in a preferred embodiment of the present invention, a lip position is stretched out at the bottom of the head cylinder 22 to provide a holding force to the contact spring 10. The lip position is formed by a stretching process at the bottom of the head cylinder 22 to form a convex ring 221 extending into the accommodating space. When the contact spring 10 is installed in the accommodating space, its lower end abuts against the convex ring 221, and the upper end of the contact spring 10 is in contact with the lower end surface of the terminal plug 40, thereby preventing the contact spring 10 from moving axially in the head cylinder 22.

[0047] The terminal plug 40 can be made of metal or plastic, preferably injection-molded plastic. It is assembled into the accommodating space using an interference fit. The terminal plug 40 is inserted into the accommodating space from the upper end of the through-hole 222. To facilitate assembly of the terminal plug 40, in a preferred embodiment of the present invention, an arcuate portion 223 is formed on the upper end surface of the head cylinder 22.

[0048] The design of the assembled terminal plug 40 facilitates the assembly of the contact spring 10 and avoids excessive deformation of the contact spring 10 during the assembly process, which affects the contact performance. The injection-molded terminal plug 40 can also optimize product costs.

[0049] Please refer to Figure 5 As shown, the terminal plug 40 is axially provided with a groove 41 on one side facing the contact spring 10 to form a depression. The main function of the groove 41 is to accommodate the end of the male terminal for insertion. The use of the female terminal can be compatible with the tolerance of the male terminal and can increase the reliability of the contact, especially the impact of vibration or stamping on the reliability of the electrical connection. The upper end of the contact spring 10 conflicts with the terminal plug 40 on both sides of the groove 41.

[0050] The contact spring 10 can be implemented using an existing conventional contact spring structure.

[0051] In order to ensure the stable contact between the contact spring 10 and the male terminal, the insertion and removal force of the male terminal can be reduced, thereby reducing the wear of the contact spring and the male terminal, and at the same time increasing the contact points between the contact spring 10 and the male terminal, reducing the contact resistance and improving the current carrying capacity. In a preferred embodiment of the present invention, Figure 6 、 7As shown, the contact spring 10 is made by stamping and rounding a metal sheet, and includes a first end 101, a second end 102 opposite to the first end 101, and a plurality of first elastic arms 11. The first end 101 and the second end 102 are both annular. The plurality of first elastic arms 11 are arranged along the circumference of the contact spring 10, and the two ends of the first elastic arm 11 are respectively connected to the first end 101 and the second end 102. When the first elastic arm 11 is made by the stamping process, the two ends of the first elastic arm 11 are respectively integrally formed with the first end 101 and the second end 102. A first contact portion 110 is provided on the inner side surface, and the first contact portion 110 can preferably be provided in the middle position in the length direction of the first elastic arm 11. The first contact portion 110 is offset toward the central axis O of the contact spring 10 compared to the first end 101 and the second end 102; at least one pair of adjacent two first elastic arms 11 among the multiple first elastic arms 11 and the first end 101 and the second end 102 form an accommodating space. In a preferred embodiment of the present utility model, an accommodating space is formed between any two adjacent first elastic arms 11.

[0052] like Figure 8 、 9 As shown, combined with Figure 6 、 7 In the present invention, a second elastic arm 12 and a third elastic arm 13 are provided in each accommodating space. The second elastic arm 12 and the third elastic arm 13 both include a connecting end and a free end opposite to the connecting end and suspended in the air. The connecting end of the second elastic arm 12 is connected to the first end 101. When manufactured by the stamping process, the connecting end of the second elastic arm 12 is integrally formed with the first end 101, and then the second elastic arm 12 and the first end 101 are integrally formed. The connecting end of the third elastic arm 13 is connected to the second end 102. Similar to the second elastic arm 12, the connecting end of the third elastic arm 13 is integrally formed with the second end 102; a second contact portion 120 is formed on the inner side surface of the free end of the second elastic arm 12, and a second contact portion 130 is formed on the inner side surface of the free end of the third elastic arm 13. The second contact portion 120 and the second contact portion 130 are both offset toward the central axis O of the contact spring 10 compared to the inner surfaces of the first end 101 and the second end 102. When the contact spring 10 is used as the main contact component of the female end of the connector, after the male terminal of the connector is inserted from the first end 101, the first contact portion 110, the second contact portion 120, and the second contact portion 130 are all squeezed by the male terminal and contact and cooperate with the outer peripheral surface of the male terminal to achieve electrical connection.

[0053] In the present invention, since the first elastic arm is fixed at both ends, after the male terminal is inserted into the contact spring 10, it can provide sufficient contact positive force through a small deformation to ensure stable contact between the male terminal and the contact spring 10. The provision of the second elastic arm 12 and / or the third elastic arm 13 can increase the contact points between the contact spring 10 and the male terminal, that is, by combining the first elastic arm 11 fixed at both ends with the second elastic arm 12 and / or the third elastic arm 13 in a cantilever structure, the male terminal insertion and extraction force is reduced on the basis of ensuring stable contact between the contact spring and the male terminal, thereby reducing the wear of the contact spring and the male terminal, and at the same time increasing the contact points between the contact spring and the male terminal, thereby reducing the contact resistance and improving the current carrying capacity.

[0054] Figure 8 、 9 The contact spring 10 is shown in its unfolded state (ie, the contact spring 10 is not enclosed in a circle). Figure 9 The diagram shows an arrangement of the first elastic arm 11, the second elastic arm 12, and the third elastic arm 13. A second elastic arm 12 and a third elastic arm 13 are provided in each accommodating space. The second elastic arm 12 and the third elastic arm 13 are arranged opposite to each other and aligned in the circumferential direction of the contact spring 10. The second elastic arm 12 and the third elastic arm 13 located in the same accommodating space form an elastic arm assembly. Multiple elastic arm assemblies are arranged at intervals from multiple first elastic arms 11 and arranged along the circumferential direction of the contact spring 10. The spacing between any adjacent elastic arm assemblies and the first elastic arm 11 is the same, and the width of the first elastic arm 11, the second elastic arm 12, and the third elastic arm 13 are all D. The width D can be optionally set to 0.3 mm, the gap between the first elastic arm 11 and the second elastic arm 12 is 0.2 mm, and the gap between the first elastic arm 11 and the third elastic arm 13 is 0.2 mm. Of course, the specific values ​​of the above widths and gaps can also be adjusted according to actual needs. When manufacturing the contact spring 10 by a stamping process, a metal sheet is selected and blanked using a stamping die. A first end 101 and a second end 102 are reserved on both sides of the metal sheet in the width direction. An arm structure with a gap of 0.2 mm and a single width of 0.3 mm is formed between the first end 101 and the second end 102. Of the two adjacent arm structures, one arm structure is processed into a first elastic arm 11, and the other arm structure is cut off in the middle of the length direction. The two sides of the cut portion are respectively processed into a second elastic arm 12 and a third elastic arm 13. The total number of first elastic arms 11 and elastic arm assemblies (i.e., a second elastic arm and its corresponding third elastic arm are referred to as an elastic arm assembly) is n. That is, when blanking the metal sheet, the number of arm structures between the first end 101 and the second end 102 is n, where n is equal to 1.5C to 2.5C, where C is the cross-sectional perimeter of the first elastic arm or the second elastic arm or the third elastic arm in the elastic arm assembly. Of course, n should be an integer. If the obtained n is not an integer, it is rounded down.

[0055] Assume that the distance between the first contact portion 110 and the central axis O of the contact spring 10 is d1, and the distance between the second contact portion 120, the second contact portion 130 and the central axis O of the contact spring 10 is d2, wherein d1 is greater than d2, that is, compared with the first contact portion 110, the second contact portion 120 and the second contact portion 130 are closer to the central axis O of the contact spring 10; since the two ends of the first elastic arm 11 are respectively connected to the first end 101 and the second end 102, the first elastic arm 11 is less likely to generate Elastic deformation, therefore, the interference of the first elastic arm 11 when mating with the male terminal is relatively small, and the interference of the second elastic arm 12 and the third elastic arm 13 when mating with the male terminal is relatively large. Since the interference of the first elastic arm 11 is relatively small, the plugging and unplugging force of the male terminal is further reduced. The interference of the second elastic arm 12 and the third elastic arm 13 is relatively large, so that the second elastic arm 12 and the third elastic arm 13 can produce a larger deformation after being squeezed by the male terminal, thereby ensuring the stability of the electrical connection after the second contact portion 120 and the second contact portion 130 contact the male terminal.

[0056] A raised portion 111 is formed in the middle of the first elastic arm 11 in the longitudinal direction and extends toward the central axis O of the contact spring 10. The inner surface of the raised portion 111 forms an arc-shaped first contact portion 110. Specifically, after the arm structure corresponding to the first elastic arm 11 is formed by punching, the middle portion of the arm structure is squeezed inward to bend it into an arc-shaped structure to form the above-mentioned raised portion 111. Of course, in other embodiments, the arc-shaped first contact portion 110 can also be formed by other means. For example, an arc-shaped metal block is fixed in the middle of the straight arm structure to form the first contact portion 110 on the inner surface of the metal block. The free end of the second elastic arm 12 is provided with a bent portion 121 that bends outward. The inner side surface of the bent portion 121 forms an arcuate second contact portion 120, and the tail end of the bent portion 121 forms a support end 122. Similar to the second elastic arm 12, the free end of the third elastic arm 13 is provided with a bent portion 131. The inner side surface of the bent portion 131 forms an arcuate second contact portion 130, and the tail end of the bent portion 131 forms a support end 132. The first contact portion 110, the second contact portion 120, and the second contact portion 130 are all provided with curved surfaces to prevent burrs generated by stamping from damaging the male terminal during insertion and removal, further increasing the service life of the male terminal and the contact spring 10. At the same time, the contact portion with the curved surface can smoothly transition when in contact with the male terminal, facilitating insertion and removal of the male terminal. When the male terminal is inserted into the contact spring 10, the male terminal squeezes the free ends of the second elastic arm 12 and the third elastic arm 13 outward, so that the support end 122 at the tail end of the bent portion 121 and the support end 132 at the tail end of the bent portion 131 contact the inner wall of the female end of the connector, increasing the contact points between the contact spring 10 and the female end housing, making the connection between the contact spring 10 and the female end housing more secure.

[0057] In order to make the second contact portion on the second elastic arm 12 and the third elastic arm 13 closer to the center axis O, so as to ensure that the support portion can be pressed against the inner wall of the female end housing after the second elastic arm 12 and the third elastic arm 13 are squeezed, the utility model sets the second elastic arm 12 to be gradually inclined toward the center axis O of the contact spring 10 from the first end 101 toward the axial middle part of the contact spring 10. Similarly, the third elastic arm 13 is set to be gradually inclined toward the center axis O of the contact spring 10 from the second end 102 toward the axial middle part of the contact spring 10. By setting the second elastic arm 12 and the third elastic arm 13 to an inclined structure, a bending portion is set at the free ends of the two to form a support end that detours outward. At the same time, the inclined second elastic arm 12 and the third elastic arm 13 enable the free ends of the two to be close to the center axis O, thereby making the second contact portion 120 and the second contact portion 130 closer to the center axis O than the first contact portion 110.

[0058] It should be noted that the above embodiment utilizes a first elastic arm fixed at both ends in conjunction with a second elastic arm and a third elastic arm in a cantilevered configuration. The first, second, and third elastic arms can be arranged in various configurations. For example, only one second elastic arm can be provided between two adjacent first elastic arms of a contact spring. In other embodiments, only one third elastic arm can be provided between two adjacent first elastic arms. For example, the second and third elastic arms provided between two adjacent first elastic arms of a contact spring can be staggered in the circumferential direction of the contact spring.

[0059] In other embodiments, rather than having a second elastic arm and / or a third elastic arm disposed between each pair of adjacent first elastic arms as in the above embodiment, the second elastic arm and / or the third elastic arm may be disposed between a portion of adjacent first elastic arms. Of course, more than two second elastic arms and / or third elastic arms may be disposed side by side in the accommodation space between adjacent first elastic arms. There are many arrangements of the first elastic arms, the second elastic arms, and / or the third elastic arms, which are not listed here. In short, any arrangement of the elastic arms fixed at both ends and the elastic arms of the cantilever structure will suffice.

[0060] The utility model also provides a connector, which is realized by using the matching structure of the above-mentioned composite high-current female terminal and male terminal, wherein the male terminal is inserted into the contact spring from the convex ring to realize the electrical connection between the male terminal and the composite high-current female terminal.

[0061] Finally, it should be noted that the above-mentioned implementation modes are only optional embodiments of the present invention and cannot be used to limit the scope of protection of the present invention. Any non-substantial changes and replacements made by those skilled in the art on the basis of the present invention shall fall within the scope of protection required by the present invention.

Claims

1. A composite high current female terminal, characterized in that: It includes a terminal body, a contact spring and a terminal plug. The terminal body is integrally formed by a stamping and stretching process. The terminal body includes a connecting part, a head cylinder and a tail crimping area. The head cylinder and the tail crimping area are arranged at the front end and the rear end of the connecting part. The head cylinder is provided with an accommodating space for installing the contact spring. The terminal plug extends into the accommodating space from one end of the accommodating space to seal the contact spring in the accommodating space.

2. The composite high-current female terminal according to claim 1, characterized in that: The head cylinder is provided with a through hole in the axial direction to form the accommodating space. A convex ring extending toward the accommodating space is formed on the lower side of the head cylinder by a stretching process. The terminal plug is interference fit with the head cylinder to crimp the contact spring between the terminal plug and the convex ring.

3. The composite high-current female terminal according to claim 1, characterized in that: The head cylinder is integrally formed by a splicing process, or / and the tail crimping area is formed by a stamping and rounding process.

4. The composite high-current female terminal according to any one of claims 1 to 3, characterized in that: A reinforcing ring is sleeved on the tail crimping area.

5. The composite high-current female terminal according to any one of claims 1 to 3, characterized in that: A groove is axially formed on one side of the terminal plug facing the contact spring.

6. The composite high-current female terminal according to any one of claims 1 to 3, characterized in that: The contact spring comprises a first end in an annular shape, a second end opposite to the first end and in an annular shape, and a plurality of first elastic arms arranged along the circumference of the contact spring; Two ends of the first elastic arm are respectively connected to the first end and the second end, and a first contact portion is provided on the inner side thereof; At least one pair of adjacent first elastic arms among the plurality of first elastic arms, together with the first end and the second end, encloses a receiving space; A second elastic arm and / or a third elastic arm is arranged in the accommodation space; the second elastic arm and the third elastic arm each include a connecting end and a free end opposite to the connecting end and suspended in the air, the connecting end of the second elastic arm is connected to the first end, the connecting end of the third elastic arm is connected to the second end, and the inner side surfaces of the free ends of the second elastic arm and the third elastic arm each form a second contact portion; The first contact portion and the second contact portion are both offset toward the central axis of the contact spring compared to the inner surfaces of the first end and the second end so that the first contact portion and the second contact portion can contact and cooperate with the outer peripheral surface of the male terminal inserted into the contact spring.

7. The composite high-current female terminal according to claim 6, characterized in that: An accommodating space is arranged between any two adjacent first elastic arms, and a second elastic arm and a third elastic arm are arranged in each accommodating space.

8. The composite high-current female terminal according to claim 7, characterized in that: The second elastic arm and the third elastic arm located in the same accommodating space are arranged opposite to each other and aligned in the circumferential direction of the contact spring to form an elastic arm assembly. The multiple elastic arm assemblies are arranged at intervals with the multiple first elastic arms and arranged along the circumferential direction of the contact spring. The spacing between any adjacent elastic arm assemblies and the first elastic arms is the same, and the widths of the first elastic arm, the second elastic arm and the third elastic arm are the same.

9. The composite high-current female terminal according to claim 7, characterized in that: The free ends of the second elastic arm and the third elastic arm are both provided with a bent portion bent outward, the inner side surface of the bent portion forms an arc-shaped second contact portion, and the tail end of the bent portion forms a supporting end.

10. A connector, characterized in that It comprises a male terminal and the composite high-current female terminal according to any one of claims 1 to 9, wherein the male terminal extends into the accommodating space and contacts the inner ring of the contact spring.

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