A low-spec, high-performance small-pitch board-to-board connector

Abstract

This invention proposes a low-profile, high-pitch board-to-board connector, comprising mating male and female connectors. The female connector includes several terminal groups, each terminal group comprising a pair of signal terminals and ground terminals arranged on both sides of the pair of signal terminals. This results in a gradual transition between the signal terminals, while the spacing between the signal terminals and the ground terminals is uniform. By optimizing the arrangement and structure of the terminal groups, this invention achieves a shift in the resonant point, effectively reducing signal crosstalk and electromagnetic interference, and improving high-frequency anti-resonance performance and the quality of high-speed signal transmission. Furthermore, by designing the structure of the male and female connectors, especially the structural design of the male connector terminals and the male and female connector plastic bodies, the positive force of the male connector terminals and the overall holding force of the connector are increased, improving insertion and removal stability and durability.

Description

Technical Field

[0001] This invention relates to the field of connectors, and more particularly to a low-pitch, high-gap board-to-board connector. Background Technology

[0002] In today's electronics industry, as devices increasingly pursue miniaturization and high performance, higher demands are placed on the interconnect technology between circuit boards. High-speed connectors, as key components in achieving this goal, directly impact the stability and transmission efficiency of the entire electronic device. However, in existing technologies, low-profile, high-performance board-to-board high-speed connectors face a series of challenges.

[0003] Firstly, in traditional low-profile, high-speed board-to-board connector designs, the length of the spring arms and the spacing between terminals are often shortened to achieve a compact size. While this design helps to achieve device miniaturization, it introduces problems that cannot be ignored. The short spring arms and resonance issues make it easy for performance crosstalk to occur between adjacent terminals when the connector is transmitting data at high speeds. This not only reduces the signal transmission quality but also affects the overall performance of the device.

[0004] Secondly, the short spring arm results in insufficient terminal holding force, becoming another prominent issue. In practical use, this leads to easy surrender of the product; that is, the connector is prone to displacement or damage when subjected to external forces, thus affecting the positive force of the terminal—the force required to maintain good contact between the terminal and its corresponding contact point. Insufficient positive force further reduces connection stability and reliability, increasing the equipment failure rate.

[0005] Therefore, in response to these issues, the industry urgently needs a new design for low-profile, high-speed board-to-board connectors that can meet the demands of device miniaturization while ensuring stable high-speed transmission performance and connector durability. Such a design will effectively address the shortcomings of existing technologies and provide stronger technical support for the development of electronic devices. Summary of the Invention

[0006] To address the aforementioned issues, this invention proposes a low-profile, high-precision, small-pitch board-to-board connector.

[0007] The main contents of this invention include:

[0008] A low-profile, high-profile, small-pitch board-to-board connector includes mating male and female connectors. The male connector includes a male connector plastic housing and male connector terminals disposed within the male connector plastic housing. The female connector includes a female connector plastic body and female connector terminals disposed within the female connector plastic body. The female connector terminals include several sets of terminal groups arranged sequentially, and each terminal group includes a pair of signal terminals and ground terminals arranged on both sides of the pair of signal terminals.

[0009] Each of the signal terminals includes a first terminal body portion, a first end bullet arm portion, and a first terminal connecting portion connecting the first terminal body portion and the first end bullet arm portion; the distance between the two first end bullet arms portions of a pair of signal terminals is greater than the distance between the two first terminal connecting portions, and the distance between the two first body portions of a pair of signal terminals is greater than the distance between the two first terminal connecting portions;

[0010] Each grounding terminal includes a second terminal body, a second bullet arm, and a second terminal connection portion connecting the second terminal body and the second bullet arm. The distance between the first terminal body of the signal terminal and the second terminal body of the adjacent grounding terminal, the distance between the first bullet arm of the signal terminal and the second bullet arm of the adjacent grounding terminal, and the distance between the first terminal connection portion of the signal terminal and the second terminal connection portion of the adjacent grounding terminal are all the same.

[0011] Preferably, the first end bullet arm portion of a single signal terminal includes a first bullet arm body segment and a first bullet arm contact segment, wherein the thickness of the first bullet arm body segment gradually decreases toward the first bullet arm contact segment.

[0012] Preferably, the female connector plastic body includes a female connector main body and two plastic bases disposed on both sides of the female connector main body. The plastic bases are provided with female terminal mounting grooves, and the female connector terminals are disposed in the female terminal mounting grooves. The female connector main body is provided with a female terminal receiving groove. When the female connector plastic body is inserted into the male connector plastic shell, the female terminal receiving groove provides space to accommodate the elastic deformation of the female connector terminals.

[0013] Preferably, the female base body includes a main body base, a main body center portion extending downward from the center of the lower surface of the main body base, and main body ends extending downward from both ends of the main body base; the female terminal receiving groove is formed on the side wall of the main body base; and the two plastic bases are assembled on both sides of the main body center portion.

[0014] Preferably, the two plastic bases are assembled to the central part of the main body via a dovetail structure, wherein the dovetail structure includes a dovetail groove formed on the central part of the main body and a dovetail-shaped protrusion protruding on one side wall of the plastic base.

[0015] Preferably, the lower end face of the dovetail protrusion has a first guide surface, and the lower end of the side wall of the central part of the main body has a second guide surface.

[0016] Preferably, a positioning groove is formed on the lower surface of the main body base, and the upper part of the plastic base is assembled in the positioning groove.

[0017] Preferably, the female base further includes an assembly and fixing component, which includes a fixing iron plate. The fixing iron plate includes a main opening and two second openings. The edge of the main opening extends to one side to form a fixing spring. A first locking protrusion is provided on the outer surface of the main body end. Locking grooves are respectively provided on the upper and lower sides of the main body end of the first locking protrusion. Second locking protrusions protrude outward from both ends of the plastic base. The first locking protrusion is disposed in the main opening, and the fixing spring is locked in the locking groove by a barbed structure. The second locking protrusion is disposed in the second opening.

[0018] Preferably, the inner surfaces of the two long sidewalls of the male connector plastic shell are provided with a plurality of male terminal mounting slots, the male terminal mounting slots penetrating the bottom wall of the male connector plastic shell; a retaining groove is provided above the male terminal mounting slots;

[0019] The male terminal includes a male terminal body and a male terminal bending portion formed at the end of the male terminal body. The male terminal body is housed in the male terminal mounting groove, and the male terminal bending portion is inserted into the retaining groove.

[0020] Preferably, the inner surfaces of the two short sidewalls of the male head plastic shell are provided with at least one mating rib; the outer surfaces of the two long sidewalls of the male head plastic shell are provided with clearance grooves.

[0021] This invention proposes a low-profile, high-precision, small-pitch board-to-board connector, which has the following advantages:

[0022] (1) By optimizing the arrangement and structure of the terminal group, especially the layout of the signal terminal and the ground terminal, the resonant point is moved backward, which can effectively reduce signal crosstalk and electromagnetic interference, and improve the high-frequency anti-resonance effect and the quality of high-speed signal transmission.

[0023] (2) By designing the male and female connector structures, especially the male terminal and the male and female plastic bodies, the positive force of the male terminal and the overall holding force of the connector are increased, thereby improving the insertion and removal stability and durability. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0025] Figure 2 for Figure 1 Longitudinal section view;

[0026] Figure 3 This is a top view of the male plastic casing;

[0027] Figure 4 This is a schematic diagram of the male connector.

[0028] Figure 5 This is a schematic diagram of the terminal block arrangement;

[0029] Figure 6 This is a schematic diagram of the female connector terminal.

[0030] Figure 7 A structural schematic diagram of the main body of the mother figure from one perspective;

[0031] Figure 8 A structural schematic diagram of the main body of the mother figure from another perspective;

[0032] Figure 9 A structural schematic diagram of the plastic base from one perspective;

[0033] Figure 10 A schematic diagram of the plastic base from another perspective;

[0034] Figure 11 This is a schematic diagram of the structure for fixing the iron sheet;

[0035] Figure label:

[0036] 1-Male connector; 10-Male connector plastic shell; 10-1 Long side wall; 10-2 Short side wall; 100-Male terminal mounting groove; 101-Retaining groove; 102-Matching rib; 103-Relief groove; 11-Male terminal; 110-Male terminal body; 111-Male terminal bending part;

[0037] 2-Female connector; 20-Female connector plastic body; 20-1-Female connector main body; 20-2-Plastic base; 200-Main body base; 2000-Positioning groove; 201-Main body center; 2010-Second guide surface; 202-Main body end; 2020-First locking protrusion; 2021-Locking groove; 203-Female terminal mounting groove; 204-Female terminal storage groove; 205-Dovetail groove; 206-Dovetail protrusion; 2060-First guide surface; 207-Second locking protrusion; 21 - Female terminal; 21a- Terminal group; 21s- Signal terminal; 210s- First terminal body; 211s- First bullet arm; 2110- First bullet arm body section; 2111- First bullet arm contact section; 212s- First terminal connection section; 21g- Grounding terminal; 210g- Second terminal body; 211g- Second bullet arm; 212g- Second terminal connection section; 22- Fixing iron plate; 220- Main opening; 221- Second opening; 222- Fixing spring. Detailed Implementation

[0038] The technical solution protected by this invention will be described in detail below with reference to the accompanying drawings.

[0039] This invention proposes a low-spec, high-pitch board-to-board connector that can solve the problems of insufficient holding force and resonance caused by the bullet-shaped end arm section in existing low-spec, high-pitch board-to-board connectors.

[0040] like Figure 1 As shown, the present invention proposes a low-profile, high-profile, small-pitch board-to-board connector, including a mating male connector 1 and a female connector 2. The male connector 1 includes a male connector plastic housing 10 and male connector terminals 11 disposed within the male connector plastic housing 10. Similarly, the female connector 2 includes a female connector plastic body 20 and female connector terminals 21 disposed within the female connector plastic body 20. Specifically, the male connector plastic housing 10 has a receiving space enclosed by two opposing long sidewalls, two opposing short sidewalls, and a bottom wall. A plurality of male connector terminals 11 are arranged sequentially along the inner wall surfaces of the two long sidewalls and extend through the bottom wall to the outside of the receiving space. The portions extending outside the receiving space are bent to form solder joints, enabling soldering to the corresponding PCB. A plurality of male connector mounting slots 100 are formed on the inner wall surfaces of the two long sidewalls, and the male connector mounting slots 100 penetrate the bottom wall of the male connector plastic housing 10. The male connector terminals 11 are disposed within the male connector mounting slots 100.

[0041] To ensure the holding force of the male terminal 11, a holding groove 101 is formed above the male terminal mounting groove 100, such as... Figure 2 As shown, the retaining groove 101 includes an inclined section extending obliquely upward from the upper end of the male terminal mounting groove 100 and a vertical section extending upward; correspondingly, as Figure 4 As shown, the male terminal 11 includes a male terminal body 110 and a male terminal bent portion 111 bent into shape at the end of the male terminal body 110. The male terminal body 110 is housed in the male terminal mounting groove 100, and the male terminal bent portion 111 is inserted into the retaining groove 101.

[0042] like Figure 3 As shown, to ensure the stability of the male and female mating, at least one mating rib 102 is provided on the inner surface of the two short sidewalls of the male connector plastic shell 10; at the same time, a clearance groove 103 is provided on the outer surface of the two long sidewalls of the male connector plastic shell, so that the welding part of the male connector terminal 11 is located in the clearance groove 103, which provides a large operating space during the assembly process, especially when cutting the material strip of the male connector terminal. At the same time, by providing the clearance groove, the two ends of the two long sidewalls of the male connector plastic shell are relatively protruding. By limiting the depth of the clearance groove 103, the male connector terminal 11 will not extend beyond the relatively protruding surfaces of the two ends of the two long sidewalls, reducing the risk of lateral scratches on the male connector terminal.

[0043] When the male connector 1 and the female connector 2 are mated, the female connector plastic body 20 is housed within the receiving space of the male connector plastic housing 10, and the female connector terminal 21 is in electrical contact with the male connector terminal 11. Please refer to the figure. Figure 5 and Figure 6 The female connector terminal 21 includes several sets of terminal groups 21a arranged in sequence. Each terminal group 21a includes a pair of signal terminals 21s and ground terminals 21g arranged on both sides of the pair of signal terminals 21s. In this embodiment, as shown... Figure 9 and Figure 10 As shown, there are a total of 18 female terminals 21 on one side, of which the two terminals at both ends are ground terminals 21g or signal terminals, while the 16 female terminals in the middle form 4 terminal groups 21a.

[0044] To meet the signal processing requirements of dual grounding and thus improve high-frequency anti-resonance performance, gradient features are designed on the signal terminal 21s and the grounding terminal 21g. Specifically, as shown in... Figure 5 As shown, each signal terminal 21s within each terminal group 21a includes a first terminal body portion 210s, a first end bullet arm portion 211s, and a first terminal connecting portion 212s connecting the first terminal body portion 210s and the first end bullet arm portion 211s; wherein, the distance D2 between the two first end bullet arms 211s of a pair of signal terminals 21s is greater than the distance D1 between the two first terminal connecting portions 212s, and the distance D3 between the two first body portions 211s of a pair of signal terminals 21s is greater than the distance D1 between the two first terminal connecting portions 212s; that is, the distance between adjacent signal terminals is gradually changing.

[0045] Meanwhile, each grounding terminal 21g includes a second terminal body 210g, a second bullet arm 211g, and a second terminal connecting portion 212g connecting the second terminal body 210g and the second bullet arm 211g. The distance between the first terminal body 210s of each signal terminal 21s and the second terminal body 210g of its adjacent grounding terminal 21g, the distance between its first bullet arm and the second bullet arm of its adjacent grounding terminal, and the distance between its first terminal connecting portion and the second terminal connecting portion of its adjacent grounding terminal are all the same, denoted as D4. That is, within each terminal group 21a, the faces of the signal terminal 21s and the grounding terminal 21g are flat, without any gradient features. Through this design, the pins of the female terminal are fixed, the resonant point is shifted backward, and the impact on the signal is minimized within the required frequency band.

[0046] Furthermore, to improve the yielding performance of the female terminal, the ends of the female terminal are thinned to create a gradually varying thickness structure, thereby improving the elasticity of the female terminal and reducing the yielding amount during normal contact; specifically, such as... Figure 6 As shown, the first end bullet arm portion 211s of the single signal terminal 21s and the second end bullet arm portion 211g of the ground terminal 21g both include a first bullet arm main body section 2110 and a first bullet arm contact section 2111, and the thickness of the first bullet arm main body section 2110 gradually decreases towards the first bullet arm contact section 2111.

[0047] Furthermore, in this invention, the female plastic body adopts a modular design, replacing the assembly terminals with assembled molding parts, thus reducing the assembly difficulty. Specifically, in this embodiment, as shown... Figure 2 As shown, the female plastic body 20 includes a female body 20-1 and two plastic bases 20-2 disposed on both sides of the female body 20-1. Specifically, please refer to... Figures 7-10 The plastic base 20-2 has a female terminal mounting groove 203 that penetrates the plastic base 20-2, and the female terminal 21 is stably disposed in the female terminal mounting groove 203. Correspondingly, the female body 20-1 has a female terminal receiving groove 204, so that the spring arm of the female terminal (the first spring arm of the signal terminal and the spring arm of the ground terminal) is located in the female terminal receiving groove 204. When the female plastic body 20 is inserted into the male plastic shell 10, the female terminal receiving groove 204 provides space for the elastic deformation of the female terminal 21.

[0048] Furthermore, such as Figure 7 As shown, the female base body 20-1 includes a main body base 200, a main body center portion 201 extending downward from the center of the lower surface of the main body base 200, and a main body end portion 202 extending downward from both ends of the main body base 200; the female terminal receiving groove 204 is formed on the side wall of the main body base 200; and the two plastic bases 20-2 are assembled on both sides of the main body center portion 201.

[0049] To ensure the stability of the assembly between the plastic base 20-2 and the female body 20-1, the two plastic bases 20-2 are assembled with the central part 201 of the main body through a dovetail structure. The dovetail structure includes a dovetail groove 205 formed on the central part 201 of the main body and a dovetail-shaped protrusion 206 protruding on one side wall of the plastic base 20-2. Through local interference, the relative position between the plastic parts is restricted and they do not fall off.

[0050] For ease of assembly, the lower end face of the dovetail protrusion 206 has a first guide surface 2060, and the lower end of the side wall of the main body center 201 has a second guide surface 2010.

[0051] To prevent the plastic base 20-2 from warping on one side, a positioning groove 2000 is provided on the lower surface of the main body base 200, so that the upper part of the plastic base 20-2 is assembled in the positioning groove 2000, which improves the reliability of the contact between terminals to a certain extent.

[0052] Please combine Figure 11 The female base 2 further includes an assembly and fixing component, which includes a fixing iron plate 22. The fixing iron plate 22 includes a main opening 220 and two second openings 221. The edge of the main opening 221 extends to one side to form a fixing spring 222. A first locking protrusion 2020 is provided on the outer surface of the main body end 202. Locking grooves 2021 are respectively provided on the upper and lower sides of the main body end 202 of the first locking protrusion 2020. The two ends of the plastic base 20-2 are provided with second locking protrusions 207 protruding outward. The first locking protrusion 2020 is disposed in the main opening 220. The fixing spring 222 is locked in the locking groove 2021 by a barb structure. The second locking protrusion 207 is disposed in the second opening 221.

[0053] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural or procedural transformations made based on the content of the present invention's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of the present invention.

Claims

1. A low-spec, high-pitch board-to-board connector, characterized in that, The device includes a mating male connector and a female connector. The male connector includes a male connector plastic housing and male connector terminals disposed within the male connector plastic housing. The female connector includes a female connector plastic body and female connector terminals disposed within the female connector plastic body. The female connector terminals include several sets of terminal groups arranged in sequence, and each terminal group includes a pair of signal terminals and ground terminals arranged on both sides of the pair of signal terminals. Each of the signal terminals includes a first terminal body, a first bullet arm, and a first terminal connecting portion connecting the first terminal body and the first bullet arm; the distance between the two first bullet arms of a pair of signal terminals is greater than the distance between the two first terminal connecting portions, and the distance between the two first terminal bodies of a pair of signal terminals is greater than the distance between the two first terminal connecting portions; Each grounding terminal includes a second terminal body, a second bullet arm, and a second terminal connection portion connecting the second terminal body and the second bullet arm. The distance between the first terminal body of the signal terminal and the second terminal body of the adjacent grounding terminal, the distance between the first bullet arm of the signal terminal and the second bullet arm of the adjacent grounding terminal, and the distance between the first terminal connection portion of the signal terminal and the second terminal connection portion of the adjacent grounding terminal are all the same. Within each terminal group, the faces of the signal terminals and grounding terminals that are facing each other are flat.

2. The low-profile, high-gap board-to-board connector according to claim 1, characterized in that, The first end bullet arm of a single signal terminal includes a first bullet arm body section and a first bullet arm contact section, wherein the thickness of the first bullet arm body section gradually decreases toward the first bullet arm contact section.

3. A low-profile, high-pitch board-to-board connector according to claim 1, characterized in that, The female connector plastic body includes a female connector main body and two plastic bases disposed on both sides of the female connector main body. The plastic bases are provided with female terminal mounting slots, and the female connector terminals are disposed in the female terminal mounting slots. The female connector main body is provided with a female terminal receiving slot. When the female connector plastic body is inserted into the male connector plastic shell, the female terminal receiving slot provides space to accommodate the elastic deformation of the female connector terminals.

4. A low-profile, high-pitch board-to-board connector according to claim 3, characterized in that, The female base body includes a main body base, a main body center portion extending downward from the center of the lower surface of the main body base, and main body ends extending downward from both ends of the main body base; the female terminal receiving groove is formed on the side wall of the main body base; and the two plastic bases are assembled on both sides of the main body center portion.

5. A low-profile, high-pitch board-to-board connector according to claim 4, characterized in that, The two plastic bases are assembled to the center of the main body via a dovetail structure, the dovetail structure including a dovetail groove formed on the center of the main body and a dovetail-shaped protrusion protruding on one side wall of the plastic base.

6. A low-profile, high-pitch board-to-board connector according to claim 5, characterized in that, The lower end face of the dovetail-shaped protrusion has a first guide surface, and the lower end of the side wall of the central part of the main body has a second guide surface.

7. A low-profile, high-pitch board-to-board connector according to claim 5, characterized in that, The lower surface of the main body base is provided with a positioning groove, and the upper part of the plastic base is assembled in the positioning groove.

8. A low-profile, high-pitch board-to-board connector according to claim 4, characterized in that, The female base also includes an assembly and fixing component, which includes a fixing iron plate. The fixing iron plate includes a main opening and two second openings. The edge of the main opening extends to one side to form a fixing spring. A first locking protrusion is provided on the outer surface of the main body end. Locking grooves are respectively provided on the upper and lower sides of the main body end of the first locking protrusion. Second locking protrusions protrude outward from both ends of the plastic base. The first locking protrusion is disposed in the main opening, and the fixing spring is locked in the locking groove by a barb structure. The second locking protrusion is disposed in the second opening.

9. A low-profile, small-pitch board-to-board connector according to any one of claims 1 to 8, characterized in that, The inner surfaces of the two long side walls of the male connector plastic shell are provided with a plurality of male terminal mounting slots, which penetrate the bottom wall of the male connector plastic shell; a retaining groove is provided above the male terminal mounting slots; The male terminal includes a male terminal body and a male terminal bending portion formed at the end of the male terminal body. The male terminal body is housed in the male terminal mounting groove, and the male terminal bending portion is inserted into the retaining groove.

10. A low-profile, small-pitch board-to-board connector according to any one of claims 1 to 8, characterized in that, The inner surfaces of the two short sidewalls of the male plastic shell are provided with at least one mating rib. The outer surfaces of the two long sidewalls of the male plastic shell are provided with clearance grooves.

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