Ultra-small high-reliability BTB connector

Abstract

The utility model discloses a subminiature high reliability BTB connector, it includes: male seat and with male seat and insert the female seat, male seat includes male end plastic main body, a plurality of male end signal terminal that sets up in male end plastic main body, and sets up male end power terminal at male end plastic main body both sides, female seat includes female end plastic main body, a plurality of female end signal terminal that sets up in female end plastic main body, and sets up female end power terminal at female end plastic main body both sides, the upper end surface recess of female end plastic main body forms the butt joint groove for accommodating male end plastic main body and realizes the clamping, the contact part of male end signal terminal and female end signal terminal constitutes three point contact structure, female end power terminal includes second female end solder leg part and contact spring part, and contact spring part extends directly upward from second female end solder leg part upper end and integrative. The utility model can guarantee BTB connector reliability while enhancing the compactness of BTB connector structure.

Description

Technical Field

[0001] This utility model relates to the field of radio frequency connector technology, and in particular to an ultra-small, high-reliability BTB connector. Background Technology

[0002] Currently, consumer electronics products such as smartphones, smartwatches, and AR / VR devices are developing towards high integration and thinner designs, which places extremely high demands on the BTB connectors used internally. The pin pitch of connectors is constantly shrinking, evolving from 0.5mm, 0.4mm, and 0.35mm to 0.3mm and even smaller.

[0003] Patent document CN201822005505.3 discloses a BTB connector, which effectively improves the contact reliability and shock resistance between terminals by setting the first and second arc-shaped raised contact areas for line contact with the limiting groove, and the third raised planar contact area for surface contact. It has the advantages of clear insertion and removal feel and stable structure.

[0004] However, its overall design philosophy is clearly outdated compared to the current trend in electronic products towards miniaturization, high-density integration, and high power transmission efficiency. Firstly, regarding the core space occupancy aspect, this existing patent has significant shortcomings; it fails to optimize the critical terminal spacing and connection height, resulting in a relatively long connector length. Secondly, the female solder pads in this existing technology use a conventional design and do not mention any special structural optimizations to enhance soldering strength. Therefore, this solution has significant deficiencies in terms of structural compactness and soldering reliability.

[0005] Therefore, it is necessary to design a new utility model to solve the above-mentioned technical problems. Utility Model Content

[0006] The main purpose of this invention is to provide an ultra-small, high-reliability BTB connector that can enhance the structural compactness of the BTB connector while meeting high current requirements, making it more suitable for miniaturization and micro-production.

[0007] The present invention achieves the above objectives through the following technical solution: an ultra-small, high-reliability BTB connector, comprising: a male connector and a female connector that mates with the male connector; The male connector includes a male plastic body, a plurality of male signal terminals arrayed within the male plastic body, and male power terminals disposed on both sides of the male plastic body. The female connector includes a female plastic body, a plurality of female signal terminals arrayed within the female plastic body, and female power terminals disposed on both sides of the female plastic body; the upper surface of the female plastic body is recessed to form a mating groove for accommodating the male plastic body and achieving engagement. The contact points of the male signal terminal and the female signal terminal form a three-point contact structure; the female power terminal includes a second female solder foot and a contact spring, the contact spring extending directly upward from the upper end of the second female solder foot and integrally formed.

[0008] Furthermore, the female signal terminal includes a first fixing part embedded in the female plastic body, a first female welding foot extending from the bottom of the female plastic body, and a contact part located in the mating groove and in contact with the male signal terminal. The contact part includes a first spring arm and a second spring arm.

[0009] Furthermore, the male signal terminal includes a first plug portion that can be inserted into the contact portion and a first male solder foot portion extending from the bottom of the male plastic body, and a limiting groove is provided on the first plug portion.

[0010] Furthermore, the three-point contact structure includes a first contact point disposed on the second spring arm of the female signal terminal, a second contact point disposed at the top end of the first spring arm of the female signal terminal and in an arc shape, and a contact surface formed on the upper surface of the contact portion of the female signal terminal; the first contact point forms a point contact with the limiting groove, the second contact point forms a point contact with the first insertion portion, and the contact surface forms a surface contact with the lower surface of the first insertion portion.

[0011] Furthermore, the second spring arm has a first groove for forming a mechanical interlock with the plastic material during injection molding.

[0012] Furthermore, the female power terminal also includes a second fixing part embedded inside the female plastic body.

[0013] Furthermore, the second fixing part is provided with a second groove for enhancing the holding force with the plastic body.

[0014] Furthermore, a groove is provided on the second female end welding foot to enhance welding reliability.

[0015] Furthermore, the male power terminal includes a second plug portion that contacts the contact spring portion and a second male solder foot portion that is adjacent to the second plug portion and extends out of the male plastic body.

[0016] Furthermore, the male signal terminal and the corresponding female signal terminal are arranged facing each other in the vertical direction.

[0017] Compared with the prior art, the advantages of this utility model of an ultra-small, high-reliability BTB connector are as follows: (1) Extreme miniaturization and high space utilization: By setting the center distance between the male and female signal terminals to 0.3mm and controlling the overall height of the connector to 0.5mm, the structure is extremely compact. Compared with traditional 0.4mm or 0.5mm pitch connectors, the total length can be reduced by about 1.2mm, which saves valuable space for PCB layout, allows more functional modules to be integrated in the same area, or directly helps the end product to achieve a thinner and narrower bezel design; (2) High-efficiency power transmission and excellent heat dissipation: The female power terminal adopts an innovative "direct lead-out" integrated design, that is, the contact spring part is directly led out from the upper end of the second female solder joint. This creates the shortest current transmission path and minimizes the loop impedance. This structural advantage directly translates into stronger overcurrent capability, lower power loss and significantly reduced operating temperature rise, meeting the core requirements of high power density applications for power terminals; (3) High mechanical reliability: In terms of structural fixation, the second spring arm of the female signal terminal is provided with a first groove, and the second fixing part of the female power terminal is provided with a second groove. These grooves form a firm mechanical interlock with the plastic during injection molding, which fundamentally solves the industry problem of easy loosening and retraction of terminals in ultra-small connectors. In terms of welding, the welding feet of the female power terminal are designed with a slotted structure, which greatly enhances the welding area and adhesion between it and the PCB pad, thereby providing a high-strength welding connection that is resistant to vibration and bending. Attached Figure Description

[0018] Figure 1 This is an exploded structural diagram of an embodiment of the present utility model; Figure 2 This is a cross-sectional structural diagram of an embodiment of the present utility model; Figure 3 This is a three-dimensional structural diagram of the female signal terminal in an embodiment of the present invention; Figure 4 This is a three-dimensional structural diagram of the female power terminal in an embodiment of the present utility model; Figure 5 This is a three-dimensional structural diagram of the female power terminal in an embodiment of the present utility model; Figure 6 This is a three-dimensional structural diagram of the male power terminal in an embodiment of the present utility model; The diagram is marked as follows: 100-BTB connector; 1-Male connector, 11-Male plastic body, 12-Male signal terminal, 121-First plug-in part, 1211-Limiting groove, 122-First male solder foot part, 13-Male plastic body, 131-Second plug-in part, 132-Second male solder foot part; 2-Female connector, 21-Female end plastic body, 22-Female end signal terminal, 221-First fixing part, 222-First female end soldering foot part, 223-Contact part, 2231-First spring arm, 22311-Second contact point, 2232-Second spring arm, 22321-First contact point, 22322-First groove, 2233-Contact surface, 23-Female end power terminal, 231-Second female end soldering foot part, 2311-Slot, 232-Contact spring part, 233-Second fixing part, 2331-Second groove. Detailed Implementation

[0019] The present invention will be further described in detail below with reference to specific embodiments.

[0020] Example: Please refer to Figures 1-6 This embodiment provides a BTB connector 100, which includes a male connector 1 and a female connector 2 that mates with the male connector 1.

[0021] The male connector 1 is an integral injection-molded structure, which includes a male plastic body 11, a plurality of male signal terminals 12 arrayed within the male plastic body 11, and male power terminals 13 disposed on both sides of the male plastic body 11.

[0022] The female connector 2 is an integral injection-molded structure, comprising a female plastic body 21, a plurality of female signal terminals 22 arrayed within the female plastic body 21, and female power terminals 23 disposed on both sides of the female plastic body 21. A mating groove 211 is recessed into the upper surface of the female plastic body 21 to accommodate the male plastic body 11 and achieve a stable engagement between the two.

[0023] In this embodiment, the number of male signal terminals 12 and female signal terminals 22 corresponds to 50 each, forming a complete signal transmission loop. In other embodiments, the specific number of terminals can be adjusted according to circuit design requirements, and this invention is not limited to this specific number. Each male signal terminal 12 and its corresponding female signal terminal 22 are arranged facing each other in the vertical direction. Therefore, the center distance between the terminals directly determines the overall size of the connector in the length direction. In this embodiment, the distance is 0.3mm. Compared with traditional connectors with a distance of 0.4mm or 0.5mm, this design reduces the total length of this BTB connector 100 by approximately 1.2mm, while achieving an ultra-low mating height of 0.5mm, thereby greatly improving the compactness of the overall structure. This miniaturized design brings several significant advantages: First, it significantly saves valuable layout space on the PCB board, creating conditions for integrating more functional modules within a limited size, or directly helping end products achieve narrower bezels and smaller sizes; second, the lightweight connector itself and the reduction in material usage help reduce the overall weight and manufacturing cost of the product; finally, the shorter internal signal path helps reduce signal transmission loss and reflection, which has a positive effect on improving high-frequency signal integrity.

[0024] The female signal terminal 22 includes a first fixing part 221 embedded in the female plastic body 21, a first female solder foot part 222 extending from the bottom of the female plastic body 21, and a U-shaped contact part 223 embedded in the inner female plastic body 21. The contact part 223 includes a first spring arm 2231 and a second spring arm 2232.

[0025] The male signal terminal 12 includes a first plug portion 121 that can be inserted into the contact portion 223, and a first male solder foot portion 122 extending from the bottom of the male plastic body 11.

[0026] A first contact point 22321 is formed on the side of the second spring arm 2232 near the male signal terminal 12, and a corresponding limiting groove 1211 is provided on the first plug-in part 121. The two cooperate to ensure that the male signal terminal 12 does not disengage from the female signal terminal 22 when it slides upward. The upper surface of the contact part 223 forms a contact surface 2233 that contacts the lower surface of the first plug-in part 121. The first spring arm 2231 is provided with an arc-shaped second contact point 22311.

[0027] Therefore, when the male connector 1 and the female connector 2 are inserted, a three-point contact structure is formed between the male signal terminal 12 and the female signal terminal 22, namely the first contact point 22321, the second contact point 22311 and the first contact surface 2233. This structure effectively improves the contact reliability, stability and self-cleaning ability.

[0028] Furthermore, to enhance the fixing force of the female signal terminal 22 within the plastic body, a first groove 22322 is stamped into the second spring arm 2232. During injection molding, the plastic material flows into the first groove 22322 to form a mechanical interlock, preventing the female signal terminal 22 from loosening.

[0029] The female power terminal 23 is formed by precision metal stamping and fixed in the female plastic body 21 by injection molding. It includes a second female welding foot 231 extending out of the female plastic body 21, a contact spring part 232 adjacent to the second female welding foot 231 and used to contact the male power terminal 13, and a second fixing part 233 embedded in the female plastic body 21.

[0030] The second female end solder pad 231 is located at the bottom of the female end power terminal 23 and extends outward. In addition, to achieve better soldering reliability, a groove is made on the second female end solder pad 231 to form a number of slots 2311, which greatly increases the contact perimeter and area between the second female end solder pad 231 and the PCB pad.

[0031] The contact spring portion 232 is an integral structure that extends directly upward from the upper end of the second female end solder foot portion 231 and is bent into shape. This ensures that there is no additional transition or bridging structure between the starting point of the current path (the second female end solder foot portion 231) and the main elastic contact portion (the contact spring portion 23), forming the shortest current transmission path. This "direct lead" design minimizes the overall impedance of the conductor, thereby effectively improving the overcurrent capacity of the terminal and significantly reducing the temperature rise caused by resistance heating under high current operating conditions. The second fixing portion 233 is located in the middle of the female end power terminal 23. To further enhance the bonding strength between the terminal and the plastic body and prevent the terminal from loosening or retracting during repeated insertion and removal or when subjected to external force, a second groove 2331 is stamped and formed on the second fixing portion 233 of the female end power terminal 23. During the injection molding process, the second groove 2331 can be filled by the molten rubber. After cooling, the rubber and the second groove 2331 form a strong mechanical interlock, which greatly enhances the retention force of the terminal in the plastic and ensures the long-term stability of the power connection.

[0032] The male power terminal 13 is also precision stamped and fixed within the male plastic body 11 via injection molding. It includes a second insertion portion 131 that contacts the contact spring portion 232, and a second male solder foot portion 132 that is adjacent to the second insertion portion 131 and extends beyond the male plastic body 11. The male power terminal 13 is inserted into the female power terminal 23 when the male connector 1 is inserted into the female connector 2.

[0033] This embodiment systematically illustrates the comprehensive advantages of this solution from both signal transmission and power transmission perspectives. Regarding signal transmission, the adoption of a three-point contact terminal structure effectively improves contact reliability and signal integrity. Simultaneously, the compact 0.3mm pitch and 0.5mm height significantly shorten the signal path, helping to suppress transmission loss and reflection, making it particularly suitable for high-frequency applications. In terms of power transmission, the "direct lead" structure of the female power terminal significantly reduces loop impedance. Combined with the slotted solder lead design and the interlocking of the fixing groove, this enhances overcurrent capability, heat dissipation performance, and the overall mechanical stability of the terminal. In summary, this invention achieves extreme miniaturization of the connector while simultaneously meeting the dual requirements of high-reliability signal transmission and efficient power distribution, providing a crucial interconnection solution for next-generation high-density electronic devices.

[0034] The above descriptions are merely some embodiments of this utility model. For those skilled in the art, various modifications and improvements can be made without departing from the concept of this utility model, and all such modifications and improvements fall within the protection scope of this utility model.

Claims

1. An ultra-miniature, high-reliability BTB connector, comprising: The male connector and the female connector that mates with the male connector are characterized in that: The male connector includes a male plastic body, a plurality of male signal terminals arrayed within the male plastic body, and male power terminals disposed on both sides of the male plastic body. The female connector includes a female plastic body, a plurality of female signal terminals arrayed within the female plastic body, and female power terminals disposed on both sides of the female plastic body; the upper end surface of the female plastic body is recessed to form a mating groove for accommodating the male plastic body and achieving engagement. The contact points of the male signal terminal and the female signal terminal form a three-point contact structure; the female power terminal includes a second female solder foot and a contact spring, the contact spring extending directly upward from the upper end of the second female solder foot and integrally formed.

2. The ultra-small, high-reliability BTB connector as described in claim 1, characterized in that: The female signal terminal includes a first fixing part embedded in the female plastic body, a first female welding foot extending from the bottom of the female plastic body, and a contact part located in the mating groove and in contact with the male signal terminal. The contact part includes a first spring arm and a second spring arm.

3. The ultra-small, high-reliability BTB connector as described in claim 2, characterized in that: The male signal terminal includes a first plug portion that can be inserted into the contact portion and a first male solder foot portion extending from the bottom of the male plastic body, and a limiting groove is provided on the first plug portion.

4. The ultra-small, high-reliability BTB connector as described in claim 3, characterized in that: The three-point contact structure includes a first contact point disposed on the second spring arm of the female signal terminal, a second contact point disposed at the top of the first spring arm of the female signal terminal and in an arc shape, and a contact surface formed on the upper surface of the contact portion of the female signal terminal; the first contact point forms a point contact with the limiting groove, the second contact point forms a point contact with the first insertion portion, and the contact surface forms a surface contact with the lower surface of the first insertion portion.

5. The ultra-small, high-reliability BTB connector as described in claim 2, characterized in that: The second spring arm has a first groove for mechanically interlocking with the plastic material during injection molding.

6. The ultra-small, high-reliability BTB connector as described in claim 1, characterized in that: The female power terminal also includes a second fixing part embedded inside the female plastic body.

7. The ultra-small, high-reliability BTB connector as described in claim 6, characterized in that: The second fixing part has a second groove for enhancing the holding force with the plastic body.

8. The ultra-small, high-reliability BTB connector as described in claim 1, characterized in that: The second female end welding foot has a groove for enhancing welding reliability.

9. The ultra-small, high-reliability BTB connector as described in claim 1, characterized in that: The male power terminal includes a second plug portion that contacts the contact spring portion and a second male solder foot portion that is adjacent to the second plug portion and extends out of the male plastic body.

10. The ultra-small, high-reliability BTB connector as described in claim 1, characterized in that: The male signal terminal and the corresponding female signal terminal are arranged facing each other in the vertical direction.

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