Terminal assembly and assembling method of terminal assembly

Abstract

The invention discloses a terminal assembly and an assembling method thereof, and belongs to the technical field of electric connection devices.The terminal assembly comprises a terminal body, a crown spring and a base; the terminal body is provided with a jack. The terminal body is provided with a first end and a second end, the jack is provided with a first orifice located at the first end and a second orifice located at the second end, and the inner wall of the first orifice is provided with a first positioning hole shoulder; the crown spring is provided with a clamping hole and is clamped in the insertion hole; the crown spring is provided with a first abutting end abutting against the first positioning hole shoulder and a second abutting end flush with the second end of the terminal body. The base is provided with a terminal hole; a second positioning hole shoulder is annularly arranged on the inner wall of the terminal hole; the second end of the terminal body and the second abutting end of the crown spring are inserted into the terminal hole and jointly abut against the second positioning hole shoulder. According to the invention, the connection stability of the terminal body and the crown spring can be improved, and the phenomena of separation, dislocation and the like between the terminal body and the crown spring can be avoided.

Description

Technical Field

[0001] This application relates to the technical field of electrical connection devices, and more particularly to a terminal assembly and a method for assembling the terminal assembly. Background Technology

[0002] In the field of connector technology, a common type of terminal assembly structure in current market applications is the socket type. Its typical structure includes a terminal body and a crown spring embedded inside the terminal body. After the mechanical assembly of the terminal body and the crown spring is completed, a permanent connection between the two is achieved through a laser welding process, which creates multiple welding points at both ends of the crown spring.

[0003] However, existing welding processes have significant technical defects: First, the control precision of key parameters such as molten pool temperature and laser energy density during welding is insufficient, resulting in poor consistency in weld joint morphology. Specifically, this manifests as large size variations in weld joints (excessively large / small weld joints) and clumps of molten nuggets, severely impacting the product's aesthetic appeal. Second, welding quality stability is difficult to guarantee, easily leading to hidden defects such as incomplete welds. When incomplete welds exist, during subsequent use, the combined effects of mechanical vibration, contact friction, and environmental oxidation will gradually deteriorate the connection interface between the terminal body and the crown spring, eventually triggering failure modes such as contact separation and axial misalignment. This results in the interruption of the electrical performance of the entire terminal assembly, significantly reducing the reliability of the connector system. Summary of the Invention

[0004] The purpose of this invention is to provide a terminal assembly and a method for assembling the terminal assembly, which can solve the above-mentioned problems existing in the prior art.

[0005] To achieve the above objectives, this application adopts the following technical solution: On one hand, a terminal assembly is provided, comprising: The terminal body has a socket; the terminal body has a first end and a second end, the socket has a first opening at the first end and a second opening at the second end, and a first positioning shoulder is provided on the inner wall of the first opening; A crown spring has a clamping hole and is engaged within the insertion hole; the crown spring has a first abutting end that abuts against the shoulder of the first positioning hole and a second abutting end that is flush with the second end of the terminal body; as well as The base is provided with terminal holes; a second positioning shoulder is provided on the inner wall of the terminal holes; The second end of the terminal body and the second abutting end of the crown spring are inserted into the terminal hole and abut against the shoulder of the second positioning hole.

[0006] Preferably, the first end of the terminal body, the first abutting end of the crown spring, and the first positioning hole shoulder are all located outside the terminal hole.

[0007] Preferably, the crown spring includes a first positioning ring, a second positioning ring, and an elastic clamping strip; the first positioning ring, the second positioning ring, and the elastic clamping strip together form the clamping hole; The first positioning ring and the second positioning ring are arranged at intervals. There are multiple elastic clips that are circumferentially distributed along the axis of the first positioning ring. One end of each elastic clip is connected to one end face of the first positioning ring, and the other end of each elastic clip is connected to one end face of the second positioning ring. The other end face of the first positioning ring abuts against the shoulder of the first positioning hole, and the other end face of the second positioning ring abuts against the shoulder of the second positioning hole.

[0008] Preferably, the elastic clip forms a predetermined angle with the axis of the first positioning ring along the radial projection of the first positioning ring.

[0009] Preferably, the predetermined included angle is between 10 degrees and 40 degrees.

[0010] Preferably, the distance between the first end of the terminal body and the second end of the terminal body is greater than or equal to 13 mm and less than or equal to 18 mm.

[0011] Preferably, the width of the first positioning hole shoulder along the extension direction of the insertion hole is greater than or equal to 0.4 mm and less than or equal to 0.5 mm.

[0012] Preferably, the first positioning hole shoulder has a guide surface flush with the first end of the terminal body, and the edge of the guide surface is provided with a first chamfer.

[0013] Preferably, the base is further provided with a wire hole for inserting a wire; the base has a first insertion surface and a second insertion surface that are opposite to each other; the terminal hole is opened on the first insertion surface and the wire hole is opened on the second insertion surface.

[0014] On the other hand, a method for assembling a terminal assembly is provided, applicable to the aforementioned terminal assembly. The method for assembling the terminal assembly includes the following steps: S10, the terminal body and the crown spring are electroplated separately; S20, insert the crown spring into the insertion hole of the terminal body, such that the first abutting end of the crown spring abuts against the first positioning hole shoulder of the terminal body, and the second abutting end of the crown spring is flush with the second end of the terminal body; S30, the second end of the terminal body and the second abutting end of the crown spring are inserted together into the terminal hole of the base, so that the second end of the terminal body and the second abutting end of the crown spring abut together against the second positioning hole shoulder of the base.

[0015] The beneficial effects of this application are as follows: The terminal assembly of this application avoids separation and misalignment between the terminal body and the crown spring by clamping the crown spring between the first positioning hole shoulder of the terminal body and the first positioning hole shoulder of the base. The crown spring can be installed and positioned without spot welding, which improves the connection stability between the terminal body and the crown spring, avoids the interruption of the electrical performance of the terminal assembly, and thus improves the reliability of the connector system.

[0016] The terminal assembly method of this application can not only simplify the assembly process of the terminal body and the crown spring and improve the assembly efficiency of the terminal body and the crown spring, but also improve the stability of the connection between the crown spring and the terminal body without the need for spot welding, thus avoiding the interruption of the electrical performance of the terminal assembly and improving the reliability of the connector system. Attached Figure Description

[0017] The present application will now be described in further detail with reference to the accompanying drawings and embodiments.

[0018] Figure 1 This is a schematic diagram of the terminal assembly. Figure 2 This is a cross-sectional view of the terminal assembly; Figure 3 An exploded view of the terminal assembly; Figure 4 An exploded cross-sectional view of the terminal assembly; Figure 5 This is a schematic diagram showing the engagement of the crown spring and the buckle; Figure 6 This is a schematic diagram showing the fit between the terminal body, the crown spring, and the base; Figure 7 This is a schematic diagram of the clamping component.

[0019] Explanation of reference numerals in the attached figures: 1. Terminal body; 2. Crown spring; 3. Base; 4. Clamping component; 11. First end; 12. Second end; 13. Insertion hole; 14. First opening; 15. Second opening; 16. First positioning shoulder; 17. First chamfer; 18. Protrusion hole; 20. Mounting groove; 21. First abutting end; 22. Second abutting end; 23. Clamping hole; 24. First positioning ring; 25. Second positioning ring; 26. Elastic clamping strip; 27. First cut; 28. Second cut; 29. ​​Recess; 31. Terminal hole; 32. Second positioning hole shoulder; 33. First vent hole; 34. Second vent hole; 36. Wire hole; 37. Inner partition wall; 38. Slot; 41. Arc-shaped part; 42. Engaging part. Detailed Implementation

[0020] To make the technical problems solved by this application, the technical solutions adopted, and the technical effects achieved clearer, the technical solutions of the embodiments of this application are further described in detail below. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0021] In the description of this invention, unless otherwise explicitly specified and limited, the terms "connected," "fixed," "linked," "communicated," "abutting," "clamping," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0022] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0023] Before discussing the exemplary embodiments in more detail, it should be noted that some exemplary embodiments are described as processes or methods depicted as flowcharts. Although the flowcharts describe the operations (or steps) as sequential processes, many of these operations can be performed in parallel, concurrently, or simultaneously. Furthermore, the order of the operations can be rearranged. The process can be terminated when its operation is completed, but it may also have additional steps not included in the figures. The process may correspond to a method, function, procedure, subroutine, subroutine, etc.

[0024] Unless otherwise stated or defined, the term "and / or" as used in this invention includes any and all combinations of one or more of the associated listed items.

[0025] For ease of description, the up and down directions mentioned below are... Figure 2 Its vertical direction is consistent with the horizontal direction mentioned below. Figure 2 Its left and right directions are consistent.

[0026] like Figures 1 to 7 As shown, this embodiment provides a terminal assembly, including a terminal body 1, a crown spring 2, and a base 3. The terminal body 1, crown spring 2, and base 3 are all conductive. The base 3 is used to connect an external cable to achieve circuit continuity. The crown spring 2, also known as a torsion spring, is an existing component in connectors used for elastically holding the pins of the pin assembly.

[0027] The terminal body 1 has a socket 13. The terminal body 1 is cylindrical. The socket 13 is used to install the crown spring 2 and to allow the pins of the pin tip assembly to be inserted. The terminal body 1 has a first end 11 and a second end 12, with the first end 11 located at the left end of the terminal body 1 and the second end 12 located at the right end of the terminal body 1. The socket 13 has a first opening 14 located at the first end 11 and a second opening 15 located at the second end 12. A first positioning shoulder 16 is provided on the inner wall of the first opening 14, and the first positioning shoulder 16 is integrally formed with the terminal body 1.

[0028] The crown spring 2 has a clamping hole 23 and is engaged within the insertion hole 13. The crown spring 2 has a first abutting end 21 that abuts against the first positioning hole shoulder 16 and a second abutting end 22 that is flush with the second end 12 of the terminal body 1. The first abutting end 21 is located at the left end of the crown spring 2, and the second abutting end 22 is located at the right end of the crown spring 2. When installing the crown spring 2, the crown spring 2 is inserted into the insertion hole 13 of the terminal body 1 through the second hole 15. After the first abutting end 21 abuts against the first positioning hole shoulder 16, the second end 12 of the terminal body 1 is just flush with the second abutting end 22 of the crown spring 2. The first positioning hole shoulder 16 can be used to achieve the installation and positioning of the first abutting end 21 of the crown spring 2.

[0029] The base 3 is cylindrical and has a terminal hole 31 located at the left end of the base 3. A second positioning shoulder 32 is provided on the inner wall of the terminal hole 31 and is integrally formed with the base 3. The second end 12 of the terminal body 1 and the second abutting end 22 of the crown spring 2 are inserted into the terminal hole 31 and abut against the second positioning shoulder 32.

[0030] After the crown spring 2 is inserted into the socket 13 and assembled with the terminal body 1, the second end 12 of the terminal body 1 and the second abutting end 22 of the crown spring 2 are simultaneously inserted into the terminal hole 31 of the base 3 until the second end 12 of the terminal body 1 and the second abutting end 22 of the crown spring 2 simultaneously abut against the second positioning hole shoulder 32. At this time, the terminal body 1 and the base 3 are interference-fitted, realizing the installation of the terminal body 1 and the second positioning hole shoulder 32, realizing the installation and positioning of the second abutting end 22 of the crown spring 2. The pin of the pin end assembly is inserted into the clamping hole 23 of the crown spring 2 from the first hole 14 of the socket 13, and the elastic clamping of the crown spring 2 realizes the electrical connection between the pin end assembly and the terminal assembly of this application.

[0031] Thus, after the terminal body 1 and the base 3 are installed, the crown spring 2 is positioned by the first positioning shoulder 16 of the terminal body 1 and the second positioning shoulder 32 of the base 3. Compared to the prior art where one end of the crown spring 2 is connected to the terminal body 1 via spot welding, the installation of the terminal assembly in this application is more convenient. It not only avoids the cumbersome welding process but also prevents the subsequent normal use of the terminal assembly from being affected by the instability of welding quality. The terminal assembly of this application is unaffected by mechanical vibration, contact friction, and environmental oxidation, thereby preventing contact separation and axial misalignment between the crown spring 2 and the terminal body 1, thus avoiding the interruption of the electrical performance of the entire terminal assembly and significantly improving the reliability of the connector.

[0032] Optionally, the first end 11 of the terminal body 1, the first abutting end 21 of the crown spring 2, and the first positioning hole shoulder 16 are all located outside the terminal hole 31, which facilitates the alignment and insertion of the pin tip assembly.

[0033] In one embodiment, the crown spring 2 includes a first positioning ring 24, a second positioning ring 25, and an elastic clamping strip 26. The first positioning ring 24, the second positioning ring 25, and the elastic clamping strip 26 together form a clamping hole 23.

[0034] The first positioning ring 24 and the second positioning ring 25 are arranged at intervals. There are multiple elastic clamping strips 26 and they are distributed circumferentially along the axis of the first positioning ring 24. One end of each elastic clamping strip 26 is connected to one end face of the first positioning ring 24, and the other end of each elastic clamping strip 26 is connected to one end face of the second positioning ring 25. The other end face of the first positioning ring 24 abuts against the first positioning hole shoulder 16, and the other end face of the second positioning ring 25 abuts against the second positioning hole shoulder 32.

[0035] The elastic clip 26 has a specific elastic deformation capability. The elastic clip 26 is recessed into the clamping hole 23. That is, the diameter of the clamping hole 23 gradually decreases and then gradually increases from the first positioning ring 24 towards the second positioning ring 25, so that the diameter of the middle part of the clamping hole 23 is the smallest. The recessed elastic clip 26 can better elastically clamp the needle of the needle end assembly.

[0036] Optionally, the first positioning ring 24 is provided with a first slit 27 extending along its own axis, and the second positioning ring 25 is provided with a second slit 28 extending along its own axis, so that the crown spring 2 can more easily generate elastic deformation and better clamp the needle of the needle end assembly.

[0037] Furthermore, the axis of the elastic clip 26 and the first positioning ring 24 are projected along the radial direction of the first positioning ring 24 at a predetermined angle C. That is, the axis of the first positioning ring 24 and the elastic clip 26 form a certain angle, and the predetermined angle C between the axis of the first positioning ring 24 and the elastic clip 26 is not equal to 0 degrees or 180 degrees. Since the insertion and extraction direction of the needle of the needle end assembly is parallel to the axis of the first positioning ring 24, this application allows the elastic clip 26 to extend along an arc trajectory. The elastic clip 26 and the insertion and extraction direction of the needle of the needle end assembly form a certain angle, increasing the contact area between the elastic clip 26 and the outer surface of the needle of the needle end assembly, improving the frictional resistance between the elastic clip 26 and the needle of the needle end assembly, making the connection when the needle of the needle end assembly is inserted into the crown spring 2 more stable, and improving the reliability of the electrical connection.

[0038] Optionally, the predetermined included angle C is 10 to 40 degrees. This angle can ensure that the elastic clip 26 can elastically abut and hold the length of the pin, and can also increase the contact area between the elastic clip 26 and the outer surface of the pin of the pin end assembly to achieve the best insertion and removal effect.

[0039] In one embodiment, the distance between the first end 11 and the second end 12 of the terminal body 1 is greater than or equal to 13 mm and less than or equal to 18 mm, so that the terminal body 1 can meet the insertion requirements of most commonly used pins on the market.

[0040] Furthermore, the width of the first positioning hole shoulder 16 along the extension direction of the insertion hole 13 is greater than or equal to 0.4 mm and less than or equal to 0.5 mm, which can ensure the strength of the first positioning hole shoulder 16 and also meet the installation of the crown spring 2 without increasing the length of the terminal body 1.

[0041] Optionally, the first positioning hole shoulder 16 has a guide surface flush with the first end 11 of the terminal body 1, and a first chamfer 17 is provided on the edge of the guide surface to facilitate the insertion of the pin into the clamping hole 23 of the crown spring 2.

[0042] It can be understood that a second chamfer is provided on the edge of the second hole 15 at the second end 12 of the terminal body 1 to facilitate the installation of the crown spring 2 in the insertion hole 13 of the terminal body 1.

[0043] In one embodiment, the base 3 is further provided with a wire hole 36 for inserting a wire or cable. The base 3 has a first insertion surface and a second insertion surface that are opposite to each other. The first insertion surface is the left end face of the base 3, and the second insertion surface is the right end face of the base 3. The terminal hole 31 is opened on the first insertion surface, and the wire hole 36 is opened on the second insertion surface. After the wire or cable is installed in the wire hole 36, the crown spring 2 is inserted into the socket 13 through the pin to realize the conduction of electricity.

[0044] Furthermore, a separating inner wall 37 is provided between the terminal hole 31 and the wire hole 36, separating and isolating the terminal hole 31 and the wire hole 36 so that they are not connected. Both the terminal hole 31 and the wire hole 36 have V-shaped grooves formed on the separating inner wall 37, which can accommodate the tip of the pin and allow multiple wires to converge when inserted into the wire hole 36. The base 3 has a first vent hole 33 and a second vent hole 34. The terminal hole 31 communicates with the outside of the base 3 through the first vent hole 33, and the wire hole 36 communicates with the outside of the base 3 through the second vent hole 34, preventing difficulties in inserting the pin and wire or cable due to pressure.

[0045] Key reference Figures 5 to 7 In one embodiment, the terminal assembly further includes a locking member 4 for preventing the terminal body 1 from separating from the base 3. The terminal body 1 has an extension hole 18, through which the insertion hole 13 is connected to the outside. The inner wall of the terminal hole 31 of the base 3 has a groove 38. A portion of the locking member 4 abuts against or connects to the elastic clip 26 of the crown spring 2, and a portion of the locking member 4 extends into the extension hole 18. The groove 38 is located on the movement path of the locking member 4 in the direction away from the elastic clip 26. Thus, when the pin is inserted into the clip hole 23 of the crown spring 2, the pin opens the elastic clip 26, and the elastic clip 26 pushes the locking member 4, causing a portion of the locking member 4 to extend out of the extension hole 18 and engage with the groove 38, thereby preventing the terminal body 1 from separating from the base 3 when the pin is inserted into the terminal assembly, and improving the stability of the connection.

[0046] Understandably, one or more clamping elements 4 can be provided. In this application, in order to make the force more even, there are multiple clamping elements 4, which are arranged at intervals along the circumference of the crown spring 2. There are multiple slots 38, protruding holes 18, and clamping elements 4, and they correspond one-to-one.

[0047] Furthermore, the elastic clip 26 of the crown spring 2 has a recess 29 extending into the clip hole 23. The elastic clip 26 has a mounting surface facing away from the clip hole 23, and a mounting groove 20 extending into the recess 29 is provided on the mounting surface. A portion of the clamping member 4 is engaged in the mounting groove 20. Specifically, the mounting groove 20 is an arc groove, and the clamping member 4 includes an arc-shaped portion 41 and a square-shaped engaging portion 42. The arc-shaped portion 41 engages in the arc groove, thereby enabling the clamping member 4 to be installed on the elastic clip 26. When the pin is inserted into the clip hole 23 of the crown spring 2, the pin abuts against the recess 29, thereby opening the elastic clip 26, so that the engaging portion 42 of the clamping member 4 engages in the slot 38 of the base 3.

[0048] Optionally, the clamping member 4 includes a conductive film and an electrorheological fluid wrapped within the conductive film. The conductive film is elastic and conductive. After the conductive film is filled with the electrorheological fluid, the arc portion 41 of the clamping member 4 becomes an arc strip. The arc portion 41 of the clamping member 4 extends along the arc trajectory. The fluidity of the electrorheological fluid allows the arc portion 41 of the clamping member 4 to engage with the mounting groove 20. The engaging portion 42 is used to engage with the slot 38. When the terminal body 1 is working, that is, when the pin is inserted into the clamping hole 23 of the crown spring 2 and current flows between the pin and the terminal assembly, the insertion of the pin into the clamping hole 23 of the crown spring 2 will push the engaging portion 42 of the clamping member 4 into the slot 38. When energized, the electrorheological fluid will solidify under the action of the current, thereby connecting the crown spring 2, the terminal body 1, and the base 3 through the clamping member 4, preventing the pin from being pulled out when energized, and improving the stability of the connection. When the current is disconnected, the electrorheological fluid returns to a liquid state. At this time, the electrorheological fluid has a certain degree of flexibility, making it easier to pull out the pin. It also facilitates the disassembly and maintenance of the crown spring 2, terminal body 1, and base 3.

[0049] Furthermore, the edge of the protrusion and the groove of the slot 38 are provided with a third chamfer to facilitate the passage of the clamping member 4.

[0050] Optionally, the inner wall of the protrusion and the inner wall of the slot 38 are provided with soft padding to prevent the clamping member 4 from being damaged by the base 3 and the terminal body 1.

[0051] This embodiment also provides a method for assembling a terminal assembly, applicable to the terminal assembly of any of the above embodiments. The method for assembling the terminal assembly includes the following steps: S10, the terminal body 1 and the crown spring 2 are electroplated separately. Electroplating adds an electroplating layer to the terminal body 1 and the crown spring 2, providing rust and corrosion protection. Traditionally, during assembly, the terminal body 1 and crown spring 2 are connected by spot welding. This welding not only requires tooling for positioning and adjustment of the terminal body 1 and crown spring 2, extending assembly time and reducing efficiency, but also damages the electroplating layer. Therefore, electroplating can only be performed after the terminal body 1 and crown spring 2 are spot-welded together. This method results in some areas being unplatable, failing to form a protective electroplating layer for the terminal body 1 and crown spring 2. This application eliminates the need for welding, allowing for separate electroplating of the terminal body 1 and crown spring 2, resulting in more comprehensive electroplating and eliminating unplatable dead zones. Separate electroplating of the terminal body 1 and crown spring 2 before assembly achieves better rust and corrosion protection.

[0052] S20, insert the crown spring 2 into the insertion hole 13 of the terminal body 1, so that the first abutting end 21 of the crown spring 2 abuts against the first positioning hole shoulder 16 of the terminal body 1, and the second abutting end 22 of the crown spring 2 is flush with the second end 12 of the terminal body 1. After the crown spring 2 is installed in the insertion hole 13 of the terminal body 1, the clamping member 4 is then installed.

[0053] S30, insert the second end 12 of the terminal body 1 and the second abutting end 22 of the crown spring 2 into the terminal hole 31 of the base 3 together, so that the second end 12 of the terminal body 1 and the second abutting end 22 of the crown spring 2 abut against the second positioning hole shoulder 32 of the base 3. At this time, the clamping member 4 is aligned with the slot 38, and the slot 38 is located on the moving path of the clamping member 4.

[0054] The terminal assembly method of this application can improve production efficiency, reduce costs, and enhance product performance, thus playing a positive role in improving the overall performance of the equipment.

[0055] The technical principles of this application have been described above with reference to specific embodiments. These descriptions are merely for explaining the principles of this application and should not be construed as limiting the scope of protection of this application in any way. Based on this explanation, those skilled in the art can readily conceive of other specific embodiments of this application without inventive effort, and these embodiments will all fall within the scope of protection of this application.

Claims

1. A terminal assembly, characterized in that, include: The terminal body (1) has a socket (13); the terminal body (1) has a first end (11) and a second end (12), the socket (13) has a first opening (14) located at the first end (11) and a second opening (15) located at the second end (12), and a first positioning shoulder (16) is provided on the inner wall of the first opening (14); The crown spring (2) has a clamping hole (23) and is engaged in the insertion hole (13); the crown spring (2) has a first abutting end (21) that abuts against the first positioning hole shoulder (16) and a second abutting end (22) that is flush with the second end (12) of the terminal body (1); as well as The base (3) is provided with a terminal hole (31); a second positioning shoulder (32) is provided on the inner wall of the terminal hole (31); The second end (12) of the terminal body (1) and the second abutting end (22) of the crown spring (2) are inserted into the terminal hole (31) and abut against the shoulder of the second positioning hole (32).

2. The terminal assembly according to claim 1, characterized in that, The first end (11) of the terminal body (1), the first abutting end (21) of the crown spring (2), and the first positioning hole shoulder (16) are all located outside the terminal hole (31).

3. The terminal assembly according to claim 1, characterized in that, The crown spring (2) includes a first positioning ring (24), a second positioning ring (25), and an elastic clamping strip (26); the first positioning ring (24), the second positioning ring (25), and the elastic clamping strip (26) together form the clamping hole (23); The first positioning ring (24) and the second positioning ring (25) are arranged at intervals. There are multiple elastic clips (26) and they are distributed circumferentially at intervals along the axis of the first positioning ring (24). One end of each elastic clip (26) is connected to one end face of the first positioning ring (24), and the other end of each elastic clip (26) is connected to one end face of the second positioning ring (25). The other end face of the first positioning ring (24) abuts against the first positioning hole shoulder (16), and the other end face of the second positioning ring (25) abuts against the second positioning hole shoulder (32).

4. The terminal assembly according to claim 3, characterized in that, The elastic clip (26) and the axis of the first positioning ring (24) are projected along the radial direction of the first positioning ring (24) at a predetermined angle.

5. The terminal assembly according to claim 4, characterized in that, The predetermined included angle is between 10 degrees and 40 degrees.

6. The terminal assembly according to any one of claims 1 to 5, characterized in that, The distance between the first end (11) and the second end (12) of the terminal body (1) is greater than or equal to 13 mm and less than or equal to 18 mm.

7. The terminal assembly according to any one of claims 1 to 5, characterized in that, The width of the first positioning hole shoulder (16) along the extension direction of the insertion hole (13) is greater than or equal to 0.4 mm and less than or equal to 0.5 mm.

8. The terminal assembly according to any one of claims 1 to 5, characterized in that, The first positioning hole shoulder (16) has a guide surface that is flush with the first end (11) of the terminal body (1), and the edge of the guide surface is provided with a first chamfer (17).

9. The terminal assembly according to any one of claims 1 to 5, characterized in that, The base (3) is also provided with a wire hole (36) for inserting wires; the base (3) has a first plug-in surface and a second plug-in surface that are opposite to each other; the terminal hole (31) is opened on the first plug-in surface and the wire hole (36) is opened on the second plug-in surface.

10. A method for assembling a terminal assembly, applied to the terminal assembly according to any one of claims 1 to 9, characterized in that, Includes the following steps: S10, the terminal body (1) and the crown spring (2) are electroplated separately; S20, insert the crown spring (2) into the insertion hole (13) of the terminal body (1), such that the first abutting end (21) of the crown spring (2) abuts against the first positioning hole shoulder (16) of the terminal body (1), and the second abutting end (22) of the crown spring (2) is flush with the second end (12) of the terminal body (1); S30, insert the second end (12) of the terminal body (1) and the second abutting end (22) of the crown spring (2) together into the terminal hole (31) of the base (3), so that the second end (12) of the terminal body (1) and the second abutting end (22) of the crown spring (2) abut together against the second positioning hole shoulder (32) of the base (3).

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