Connector terminal and electrical connector

Abstract

The connector terminal and the electric connector of the present disclosure, the connector terminal comprises a crimping section and a guide section connected with the crimping section, wherein the crimping section is provided with an elastic expansion structure, the crimping section is provided with a gradually thinning structure in thickness, the elastic expansion structure can realize interference fit with the electric connection hole of the circuit board through the expansion and contraction deformation of itself, the gradually thinning design reduces the insertion force of the crimping section inserted into the electric connection hole by reducing the material thickness at a certain position, while maintaining sufficient holding force with the electric connection hole to ensure the stable crimping of both, thereby significantly avoiding the risk of cracking or damage of the metal plating layer in the electric connection hole due to excessive insertion force, and improving the product quality and reliability.

Description

Technical Field

[0001] This disclosure pertains to the field of connector technology, and particularly relates to a connector terminal and an electrical connector. Background Technology

[0002] In electronic product manufacturing, connectors are used to achieve electrical connections between different circuit boards or modules. Traditional connection methods often involve soldering, but soldering has many drawbacks. For example, it requires the use of flux, high temperatures can cause adverse reactions on the circuit board, and replacing the connector is inconvenient once a problem occurs. With the development of electronic technology, higher requirements are being placed on existing connectors.

[0003] To address the aforementioned issues, press-fit connection technology was developed. In press-fit connection technology, connector terminals are provided. By applying a certain force to the connector terminals, they are pressed into the electrical connection holes of the circuit board, allowing the connector terminals to connect to the circuit board through the electrical connection holes and complete circuit conduction. This electrical connection method eliminates the need for soldering, reduces the use of flux, avoids the impact of high temperatures on the motherboard, and makes replacement more convenient.

[0004] However, for small-sized connector terminals, especially when they serve as power pins to carry large currents, the design and stability requirements are even higher. Excessive insertion force when inserting existing connector terminals into electrical connection holes on circuit boards can cause cracking or damage to the copper plating of the holes, affecting product quality and reliability. Therefore, effectively reducing insertion force while ensuring sufficient holding force is a significant challenge facing current press-fit connection technology. Summary of the Invention

[0005] In view of the shortcomings of the prior art described above, the purpose of this disclosure is to provide connector terminals and electrical connectors to solve the problems in the related art.

[0006] The first aspect of this disclosure provides a connector terminal, including a crimping section and a guide section connected to the crimping section. The crimping section is provided with an elastic retraction structure that can achieve an interference fit with an electrical connection hole in a circuit board through retraction and expansion deformation. The crimping section is provided with a gradually thinning structure in terms of thickness that can reduce the insertion force of the connector terminal into the electrical connection hole.

[0007] In an embodiment of the first aspect, the resilient retraction structure is at least one retraction through-hole that extends through the thickness of the crimping section.

[0008] In the first aspect of the embodiment, the elastic retractable structure is a retractable through hole located in the central region of the crimping section and penetrating the thickness of the crimping section. The retractable through hole is fish-eye shaped, elliptical, or oblong. The dimension of the retractable through hole along the length direction of the crimping section is larger than the dimension of the retractable through hole along the width direction of the crimping section.

[0009] In the first aspect of the embodiment, the elastic retractable structure is a pair of retractable through holes, the pair of retractable through holes being disposed in the central region of the crimping section and symmetrically arranged along the width direction of the crimping section, the pair of retractable through holes being elongated, and their dimensions along the length direction of the crimping section being larger than the dimensions of the retractable through holes along the width direction of the crimping section.

[0010] In an embodiment of the first aspect, the crimping section has a streamlined structure on both sides in the width direction, wherein the front half of the side portion of the crimping section near the guide section in the length direction has a first R-angle, and the rear half of the side portion of the crimping section away from the guide section in the length direction has a second R-angle, the openings of the first R-angle and the second R-angle face the same side and the first R-angle is greater than the second R-angle.

[0011] In an embodiment of the first aspect, the gradient thinning structure is disposed on at least one surface of the pressing section in terms of thickness; the gradient thinning structure includes: a thinning section on the pressing section corresponding to the central region of the elastic retractable structure; a first inclined section with a first angle on the pressing section along the length direction near the guide section and corresponding to the starting region of the elastic retractable structure; and a second inclined section with a second angle on the pressing section along the length direction away from the guide section and corresponding to the ending region of the elastic retractable structure, wherein the first angle is smaller than the second angle.

[0012] In the first aspect of the embodiment, the first inclined section and the thinning section have a linear smooth transition, and the thinning section and the second inclined section have a linear smooth transition.

[0013] In an embodiment of the first aspect, the head of the guide segment is truncated pyramidal, truncated conical, or sharp.

[0014] In an embodiment of the first aspect, the connector terminal further includes a base connected to the crimping section, and a stop portion is provided between the base and the crimping section.

[0015] A second aspect of this disclosure provides an electrical connector, including a circuit board and connector terminals as described above. The circuit board has conductive vias, and the connector terminals pass through the conductive vias and are connected to the circuit board.

[0016] As described above, this disclosure provides connector terminals and electrical connectors. The connector terminals include a crimping section and a guide section connected to the crimping section. The crimping section has an elastic retraction structure and a gradually thinning structure. The elastic retraction structure can achieve an interference fit with the electrical connection hole of the circuit board through its own retraction and deformation. The gradually thinning design effectively reduces the insertion force of the crimping section into the electrical connection hole by reducing the material thickness at specific locations, thereby significantly avoiding the risk of cracking or damage to the metal plating in the electrical connection hole due to excessive insertion force. Simultaneously, this technical solution maintains sufficient holding force while reducing the insertion force, ensuring the stability of the crimp and improving product quality and reliability. Attached Figure Description

[0017] Figure 1 The diagram shown is a perspective view of one embodiment of the connector terminal of this disclosure.

[0018] Figure 2 Displayed as Figure 1 The front view.

[0019] Figure 3 This diagram shows a connector terminal inserted into an electrical connection hole on a circuit board.

[0020] Figure 4 The diagram shown is a schematic representation of the connector terminals of this disclosure in another embodiment.

[0021] Figure 5 The image shown is a side view of one embodiment of the connector terminal of this disclosure.

[0022] Figure 6 The diagram shows a comparison of insertion force between connector terminals with a gradient thinning structure and general connector terminals without a gradient thinning structure as designed in this disclosure.

[0023] Figure 7 This diagram shows a comparison of the retaining force between connector terminals with a gradient thinning structure and general connector terminals without a gradient thinning structure. Detailed Implementation

[0024] The following specific examples illustrate the implementation of this disclosure. Those skilled in the art can easily understand other advantages and effects of this disclosure from the information disclosed herein. This disclosure can also be implemented or applied through other different specific embodiments, and various details in this disclosure can be modified or changed according to different viewpoints and application modules without departing from the spirit of this disclosure. It should be noted that, unless otherwise specified, the embodiments and features in the embodiments of this disclosure can be combined with each other.

[0025] The embodiments of this disclosure will now be described in detail with reference to the accompanying drawings, so that those skilled in the art to which this disclosure pertains can readily implement it. This disclosure may be embodied in many different forms and is not limited to the embodiments described herein.

[0026] In this disclosure, references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic represented in connection with that embodiment or example is included in at least one embodiment or example of this disclosure. Furthermore, the specific features, structures, materials, or characteristics represented may be combined in any suitable manner in any one or a group of embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples represented in this disclosure, as well as the features of those different embodiments or examples.

[0027] Furthermore, the terms "first" and "second" are used for illustrative purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the representation of this disclosure, "a set" means two or more, unless otherwise explicitly specified.

[0028] For the purpose of clarity, devices unrelated to the description are omitted, and the same or similar components throughout the specification are given the same reference numerals.

[0029] Throughout this specification, when it is said that a device is "connected" to another device, this includes not only "direct connection" but also "indirect connection" by placing other components in between. Furthermore, when it is said that a device "comprises" a certain constituent element, unless otherwise stated otherwise, this does not exclude other constituent elements, but rather implies that other constituent elements may be included.

[0030] While the terms first, second, etc., are used in some examples herein to refer to various elements, these elements should not be limited by these terms. These terms are used only to distinguish one element from another. For example, first interface and second interface, etc., are used. Furthermore, as used herein, the singular forms “a,” “an,” and “the” are intended to also include the plural forms unless the context indicates otherwise. It should be further understood that the terms “comprising,” “including,” indicate the presence of the stated feature, step, operation, element, module, item, kind, and / or group, but do not exclude the presence, occurrence, or addition of one or more other features, steps, operations, elements, modules, items, kinds, and / or groups. The terms “or” and “and / or” as used herein are interpreted as inclusive, or mean any one or any combination thereof. Thus, “A, B, or C” or “A, B, and / or C” means “any one of: A; B; C; A and B; A and C; B and C; A, B, and C.” Exceptions to this definition will only occur if the combination of elements, functions, steps, or operations is inherently mutually exclusive in some way.

[0031] The technical terms used herein are for reference only to specific embodiments and are not intended to limit the scope of this disclosure. The singular form used herein includes the plural form unless the statement explicitly indicates otherwise. The word "comprising" as used in this specification means to specify a particular characteristic, region, integer, step, operation, element, and / or component, and does not exclude the presence or addition of other characteristics, regions, integers, steps, operations, elements, and / or components.

[0032] Although not explicitly defined, all terms, including technical and scientific terms used herein, shall have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure pertains. Terms defined in commonly used dictionaries shall be further interpreted as having a meaning consistent with the relevant technical literature and the message of the present disclosure, and shall not be over-interpreted as having an ideal or overly formulaic meaning unless otherwise defined.

[0033] This disclosure provides a connector terminal and an electrical connector. By modifying the structure of a general connector terminal, it can maintain sufficient holding force with the electrical connection hole when inserted into the electrical connection hole of a circuit board, while reducing the insertion force of the terminal into the electrical connection hole. This avoids the risk of cracking or damage to the metal plating in the electrical connection hole due to excessive insertion force, ensuring the stability and reliability of the connection, and also improving the quality and reliability of the electrical connector.

[0034] Please see Figures 1 to 3 ,in, Figure 1 The diagram shown is a perspective view of one embodiment of the connector terminal of this disclosure. Figure 2 Displayed as Figure 1 Front view, Figure 3 This diagram shows a connector terminal inserted into an electrical connection hole on a circuit board.

[0035] like Figures 1 to 3 As shown, this embodiment of the disclosure provides a connector terminal 1 for insertion into a corresponding electrical connection hole 21 to achieve a mating connection with a circuit board 2. The circuit board can be, for example, a printed circuit board (PCB), which serves as a support for electronic components and a carrier for electrical connections between them. It achieves the fixing, assembly, and electrical interconnection of electronic components by etching conductive paths (copper traces) onto an insulating substrate and combining this with processes such as drilling and electroplating. Electrical connection holes 21 can be provided on the circuit board 2. These electrical connection holes 21 are typically plated through holes (PTHs), with a layer of conductive metal (e.g., copper, aluminum, or their alloys) electroplated inside the hole walls, allowing the copper traces at both ends and even in the middle of the hole to conduct electricity.

[0036] The connector terminal 1 includes a crimping section 11 and a guide section 13 connected to the crimping section 11.

[0037] The guide segment serves to guide the insertion of the electrical connection hole 21, effectively correcting center misalignment caused by product manufacturing or positioning. In some embodiments, the head of the guide segment 13 is shaped like a frustum pyramid, a frustum cone, or a sharp point.

[0038] The crimping section 11 is the main body of the connector terminal 1. The rear end of the crimping section 11 extends upward to connect to the base 15, which can also be called the head. The front end of the crimping section 11 extends downward to connect to the guide section 13.

[0039] In addition to the rear end and the front end, the crimping section 11 also has a first surface, a second surface, and a first side surface and a second side surface connecting the first surface and the second surface. The first surface and the second surface define the thickness of the crimping section 11, and the first side surface and the second side surface define the width of the crimping section 11. In some examples, the first side surface and the second side surface can be a plane, an arc transition surface, or a multi-faceted transition surface, etc.

[0040] When not under stress, the width of the crimp section 11 is slightly larger than the electrical connection hole 21 of the circuit board 2.

[0041] The crimping section 11 is provided with an elastic retraction structure. This structure allows the crimping section 11 to deform under pressure, thus achieving an interference fit with the electrical connection hole 21 when inserted. In some embodiments, the connector terminal 1 may be made of materials such as phosphor bronze, brass, or beryllium copper, which possess good conductivity and high strength and elasticity.

[0042] In some embodiments, the resilient retraction structure may be, for example, at least one retraction through-hole extending through the thickness of the crimp section 11.

[0043] like Figure 1 and Figure 2 As shown, the elastic retractable structure is a retractable through-hole 111 formed in the central region of the crimping section 11 and extending through the thickness of the crimping section. The retractable through-hole 111 has a regular shape, and its dimension along the length direction of the crimping section is larger than its dimension along the width direction of the crimping section. For example, the retractable through-hole 111 may be fisheye-shaped, but it is not limited to this. In other examples, the retractable through-hole 111 may also be elliptical or oblong, etc.

[0044] In some embodiments, such as Figure 4 As shown, the elastic retractable structure can be, for example, a pair of retractable through holes 112 and 114. The pair of retractable through holes 112 and 114 are located in the central region of the crimping section 11 and are symmetrically arranged along the width direction of the crimping section. The pair of retractable through holes 112 and 114 are elongated. Specifically, the dimension of the retractable through hole 112 (114) along the length direction of the crimping section is larger than the dimension of the retractable through hole 112 (114) along the width direction of the crimping section.

[0045] In some embodiments, the elastic retractable structure may be, for example, three or more retractable through holes 111, each of which may be arranged sequentially and symmetrically along the width direction of the crimping section.

[0046] The crimping section 11 has a streamlined structure on both sides in the width direction. For example... Figure 1 and Figure 2As shown, the crimping section 11 is symmetrically arranged on both sides in the width direction. For either side, the front half of the side near the guide section 13 in the length direction has a first radius (R1), and the rear half of the side away from the guide section 13 in the length direction has a second radius (R2). The openings of the first and second radius face the same side, and the first radius is larger than the second radius. The larger first radius provides a smoother contact surface, effectively reducing the initial insertion force, allowing the crimping section 11 to enter the opening of the electrical connection hole 21 more smoothly, reducing the impact on the hole wall of the electrical connection hole 21 in the circuit board 2. After the crimping section 11 is fully inserted into the electrical connection hole 21 and forms a crimp fit, the smaller second radius helps to provide a more concentrated contact stress, thereby ensuring sufficient holding force, making the crimping section 11 stable and reliable in the electrical connection hole 21, and not easy to loosen.

[0047] This structural design ensures that the crimping section 11 can effectively maintain a smaller insertion force but a larger holding force in the front half of the insertion area during insertion into the electrical connection hole 21. Furthermore, the guide section 13 features a smooth linear transition between the front and rear halves.

[0048] The crimping section has a gradually thinning structure, which reduces the insertion force of the connector terminal into the electrical connection hole.

[0049] The gradient thinning structure may be disposed on at least one surface of the crimping section in terms of thickness. In some embodiments, the gradient thinning structure may be disposed on one surface of the crimping section in terms of thickness, for example, a first surface or a second surface. In some embodiments, the gradient thinning structure may be disposed on two surfaces of the crimping section in terms of thickness, for example, a first surface and a second surface. In some embodiments, the gradient thinning structure includes: a thinning section on the crimping section corresponding to the central region of the elastic retractable structure; a first inclined section with a first angle on the crimping section along its length direction near the guide section and corresponding to the starting region of the elastic retractable structure; and a second inclined section with a second angle on the crimping section along its length direction away from the guide section and corresponding to the ending region of the elastic retractable structure, wherein the first angle is smaller than the second angle. Through the gradient thinning structure, the overall thickness of the crimping section is reduced, thereby reducing the insertion force of the connector terminal into the electrical connection hole and alleviating the pressure on the metal plating of the inserted electrical connection hole 21.

[0050] Please see Figure 5 The image shown is a side view of a connector terminal in one embodiment of this disclosure. Figure 1 and Figure 5As shown, a gradient thinning structure is designed on one surface of the crimping section 11. The gradient thinning structure is substantially the same length as the take-up / release through-hole 111. Specifically, the gradient thinning structure includes: a thinning section 112 on the crimping section 11 corresponding to the central region of the take-up / release through-hole 111 (i.e., the widest part of the take-up / release through-hole 111), with a thinning drop between the thinning section 112 and the surface of the crimping section 11 (e.g., the first surface or the second surface). A first inclined section 113 with a first angle is provided on the crimping section 11 along its length direction near the guide section 13 and corresponding to the starting region of the take-up / release through-hole 111; a second inclined section 114 with a second angle is provided on the crimping section 11 along its length direction away from the guide section 13 and corresponding to the ending region of the take-up / release through-hole 111.

[0051] The thinning drop in the thinning section 112 can depend on the thickness of the crimping section 11 (i.e., the distance between the first and second surfaces). A larger thinning drop in the thinning section 112 results in a smaller thickness of the corresponding guide section 13. Determining the thinning drop requires considering both the insertion force of the guide section 13 into the electrical connection hole 21 and the sufficient holding force between the guide section 13 and the electrical connection hole 21. For example, a gradient thinning structure can be designed on one surface (the first or second surface) of the crimping section 11. The thinning drop in the thinning section of this gradient thinning structure can be, for example, 8% to 12% of the thickness of the crimping section (i.e., the distance between the first and second surfaces), such as 8%, 8.5%, 9%, 9.5%, 10%, 10.5%, 11%, 11.5%, 12%, etc. For example, if the set thickness of the crimping section 11 is 0.8 mm, then the thinning drop of the thinning section designed in the central area corresponding to the through hole of the crimping section can be, for example, 0.08 mm, so that the thickness of the central area is reduced to 0.72 mm. Exemplarily, a gradient thinning structure is designed on each of the two surfaces (the first surface and the second surface) of the crimping section 11. The thinning drop of the thinning section in each gradient thinning structure can be, for example, 6% to 7% of the thickness of the crimping section (i.e., the distance between the first surface and the second surface), such as 5%, 5.5%, 6%, 6.5%, 7%, etc.

[0052] In some embodiments, the thinning section 112 may be, for example, a straight section. In some embodiments, the thinning section 112 may be, for example, a concave section with a certain curvature. In some embodiments, the thinning section 112 may be, for example, a convex section with a certain curvature. In some embodiments, the thinning section 112 may be, for example, a combination section in which the concave and convex sections are smoothly connected.

[0053] In some embodiments, the inclination angle (i.e., the first angle) in the first inclined section 113 is smaller than the inclination angle (i.e., the second angle) in the second inclined section. Figure 5It can be seen that the first inclined section 113 is longer and has a gentler slope than the second inclined section 114. In some embodiments, the inclination angle (i.e., the first angle) in the first inclined section 113 is equal to the inclination angle (i.e., the second angle) in the second inclined section.

[0054] Please see Figure 6 and Figure 7 ,in, Figure 6 The diagram shows a comparison of the insertion force between connector terminals with a gradient thinning structure as designed in this disclosure and general connector terminals without a gradient thinning structure. Figure 7 This diagram shows a comparison of the retaining force between connector terminals with a gradient thinning structure and general connector terminals without a gradient thinning structure. Figure 6 In the diagram, the solid line represents the insertion force curve of a connector terminal without a gradient thinning structure, while the dashed line represents the insertion force curve of a connector terminal with a gradient thinning structure. Comparing the two, it can be observed that while the connector terminal with a gradient thinning structure shows no significant change in displacement compared to the connector terminal without a gradient thinning structure, its insertion force is significantly reduced. Figure 7 In the diagram, the solid line represents the retention force curve of a connector terminal without a gradient thinning structure, while the dashed line represents the retention force curve of a connector terminal with a gradient thinning structure. Comparing the two, it can be found that the connector terminal with a gradient thinning structure does not show significant changes in displacement compared to the connector terminal without a gradient thinning structure, and their retention force performance is similar with no significant difference.

[0055] like Figure 1 and Figure 2 As shown, a base 15 extends upward from the rear end of the crimping section 11 away from the guide section 13 and is connected thereto. The base 15 can be electrically connected to other conductive components. In addition, a stop portion 17 is provided between the base 15 and the crimping section 11 to act as a stop and prevent the connector terminal 1 from being inserted too deeply into the electrical connection hole 21.

[0056] When the connector terminal 1 in this embodiment is applied, a force is applied to the rear end of the connector terminal 1, causing the guide segment 13 of the connector terminal 1 to be aligned with and inserted into the electrical connection hole 21. The first R-angle at the front of the guide segment 13 provides a smoother contact surface, effectively reducing the initial insertion force, allowing the crimping segment 11 to enter the opening of the electrical connection hole 21 more smoothly, reducing the impact on the hole wall of the electrical connection hole 21 in the circuit board 2. As the insertion deepens, the crimping segment 11 of the connector terminal 1 enters the electrical connection hole 21, pressing... After being pressed against the wall of the electrical connection hole 21, the crimping segment 11 deforms by means of the expansion and contraction through the through hole 111, achieving an interference fit with the electrical connection hole of the circuit board. At the same time, the gradually thinning design of the crimping segment 11 can effectively reduce the insertion force of the crimping segment into the electrical connection hole 21. Finally, when the guide segment 13 is fully inserted into the electrical connection hole 21, the second R angle at the rear of the guide segment 13 helps to provide more concentrated contact stress, thereby ensuring sufficient holding force, making the crimping segment 11 stable and reliable in the electrical connection hole 21, and not easy to loosen.

[0057] This disclosure also provides an electrical connector, which includes a circuit board and connecting terminals.

[0058] The aforementioned may be, for example, a printed circuit board (PCB), on which electrical connection holes may be provided. These electrical connection holes are typically plated through holes (PTHs), and the inner walls of the holes are electroplated with a layer of conductive metal (e.g., copper, aluminum, or their alloys).

[0059] The connecting terminal includes a crimping section and a guide section connected to the crimping section. The crimping section has an elastic retraction structure that can achieve an interference fit with the electrical connection hole in the circuit board through retraction and expansion deformation. The crimping section has a gradually thinning structure in terms of thickness to reduce the insertion force of the connector terminal into the electrical connection hole. The specific structures of the crimping section, guide section, elastic retraction structure, and gradually thinning structure can be found in the detailed description above.

[0060] In summary, the embodiments of this disclosure provide connector terminals and electrical connectors. The connector terminal includes a crimping section and a guide section connected to the crimping section. The crimping section has an elastic retraction structure and a gradually thinning structure. The elastic retraction structure can achieve an interference fit with the electrical connection hole of the circuit board through its own retraction and deformation. The gradually thinning design effectively reduces the insertion force of the crimping section into the electrical connection hole by reducing the material thickness at specific locations, thereby significantly avoiding the risk of cracking or damage to the metal plating in the electrical connection hole due to excessive insertion force. Simultaneously, this technical solution maintains sufficient holding force while reducing the insertion force, ensuring the stability of the crimp and improving product quality and reliability.

[0061] The above embodiments are merely illustrative of the principles and effects of this disclosure and are not intended to limit this disclosure. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this disclosure. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this disclosure should still be covered by the protection scope of this disclosure.

Claims

1. A connector terminal characterized by comprising: It includes a crimping section and a guide section connected to the crimping section. The crimping section is provided with an elastic retraction structure that can achieve an interference fit with the electrical connection hole in the circuit board through retraction and expansion deformation. The crimping section is provided with a gradually thinning structure in terms of thickness that can reduce the insertion force of the connector terminal into the electrical connection hole.

2. The connector terminal according to claim 1, characterized in that, The elastic retraction structure is at least one retraction through hole that penetrates the thickness of the pressing section.

3. The connector terminal according to claim 2, characterized in that, The elastic retractable structure is a retractable through hole located in the central region of the crimping section and penetrating the thickness of the crimping section. The retractable through hole is fish-eye shaped, elliptical, or oblong. The dimension of the retractable through hole along the length direction of the crimping section is larger than the dimension of the retractable through hole along the width direction of the crimping section.

4. The connector terminal according to claim 2, characterized in that, The elastic retractable structure consists of a pair of retractable through holes. The pair of retractable through holes are located in the central region of the crimping section and are symmetrically arranged along the width direction of the crimping section. The pair of retractable through holes are elongated, and their dimensions along the length direction of the crimping section are larger than the dimensions of the retractable through holes along the width direction of the crimping section.

5. The connector terminal according to claim 1, characterized in that, The crimping section has a streamlined structure on both sides in the width direction. The front half of the side portion of the crimping section near the guide section in the length direction has a first R-angle, and the rear half of the side portion of the crimping section away from the guide section in the length direction has a second R-angle. The openings of the first R-angle and the second R-angle face the same side, and the first R-angle is larger than the second R-angle.

6. The connector terminal according to claim 1, characterized in that, The gradient thinning structure is disposed on at least one surface of the pressing section in terms of thickness; The gradient thinning structure includes: a thinning section on the pressing section corresponding to the central area of ​​the elastic retractable structure; a first inclined section with a first angle on the pressing section along the length direction near the guide section and corresponding to the starting area of ​​the elastic retractable structure; and a second inclined section with a second angle on the pressing section along the length direction away from the guide section and corresponding to the ending area of ​​the elastic retractable structure, wherein the first angle is smaller than the second angle.

7. The connector terminal according to claim 6, characterized by The first inclined section and the thinning section have a linear and smooth transition, and the thinning section and the second inclined section have a linear and smooth transition.

8. The connector terminal according to claim 1, characterized in that, The head of the guide section is shaped like a frustum of a pyramid, a frustum of a cone, or a sharp point.

9. The connector terminal according to Claim 1, characterized by It also includes a base connected to the crimping section, and a stop is provided between the base and the crimping section.

10. An electrical connector, characterized in that, include: The circuit board and the connector terminal as described in any one of claims 1 to 9, wherein the circuit board has conductive vias, and the connector terminal passes through the conductive vias and is connected to the circuit board.

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