Front insertion and rear attachment connector

Abstract

The utility model discloses a front insert rear pasting connector relates to connector technical field. Including first terminal group, second terminal group, tongue piece, first terminal group with second terminal group all include contact part, fixed part, welding part, the fixed part of first terminal group is close to the convex structure of its welding part a section, the welding part of second terminal group is the convex structure, in this scheme, two groups of welding parts are arranged in the space orientation of the space perpendicular to each other, and the welding part of first terminal group can be in front insert action with the pad of PCB window side wall and is positioned, and the welding part of second terminal group and the pad of PCB bottom surface are positioned, thereby in one time front insert positioning process, the alignment of two direction welding parts and pad is completed simultaneously, need not separate operation, and two groups of welding parts keep fixed space angle and positional relationship after assembling, can directly adapt the positioning process of SMT paster, make the automation equipment complete front insert and two direction welding alignment in one time pasting, need not manual intervention, and production efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of connector technology, specifically a front-mounted and rear-mounted connector. Background Technology

[0002] Front-mount, rear-mount connectors are a type of connector structure suitable for SMT (Surface Mount Technology) processes. During assembly, they are first inserted and positioned from the front of the PCB, and then the electrical connection between the terminals and the PCB pads is completed through a reflow soldering process. These connectors typically include two sets of terminals, each used for soldering connections in different directions to meet specific installation space and signal transmission requirements.

[0003] 1. In the prior art, the soldering parts of the terminal group are usually located in the same direction or plane. Since the soldering parts of the terminal group are in the same direction, it is impossible to simultaneously align and position one set of soldering parts with the pads on the side wall of the PCB window and another set of soldering parts with the pads on the bottom surface of the PCB in one pre-insertion action during assembly. They must be operated separately. This not only requires manual alignment or post-soldering process in addition to SMT assembly, but also increases the risk of positional deviation between the terminal group and the pads due to multiple positioning. In addition, the consistency of manual intervention is poor, resulting in low overall production efficiency.

[0004] 2. In existing technologies, terminal blocks near the solder joints are typically straight sections. After insertion into the PCB, the gap between the solder joint and the pad can easily vary due to board thickness tolerances, terminal deformation, or inconsistent assembly pressure, resulting in uneven solder wetting paths during reflow soldering. If the gap is too small, the terminal may be directly pressed against the pad, making it difficult for the solder to flow evenly; if the gap is too large, it may lead to insufficient solder joints or cold solder joints. Especially when solder joints exist in two directions simultaneously, the lack of stable gap control will cause inconsistent heating conditions for solder joints in different directions, making it impossible to achieve sufficient wetting simultaneously in the same reflow, thus reducing solder joint quality and consistency.

[0005] 3. The existing terminal block fixing structure is prone to relative displacement due to external force or vibration during handling, picking, or insertion. This causes the corresponding soldering parts and pads to misalign at the moment of placement. At the same time, the lack of a unified internal positioning reference makes it difficult for SMT placement machines to ensure that the two sets of soldering parts can reliably fit with their corresponding pads at the same time during insertion, even if they rely on shielding shells or tongues for shape positioning. This affects placement accuracy and increases the soldering defect rate. Utility Model Content

[0006] The purpose of this application is to provide a technical solution to address the problems mentioned in the background section.

[0007] To achieve the above objectives, this application provides the following technical solution:

[0008] A front-mounted and rear-mounted connector includes a first terminal group, a second terminal group, and a tongue. Both the first terminal group and the second terminal group include a contact portion, a fixing portion, and a soldering portion. The fixing portion of the first terminal group has a protruding structure near its soldering portion, and the soldering portion of the second terminal group also has a protruding structure.

[0009] The first terminal group is molded with a matching first insulating block and the solder portion of the first terminal group extends from the side of the first insulating block; the second terminal group is molded with a matching second insulating block and the solder portion of the second terminal group extends from the bottom of the second insulating block.

[0010] The first insulating block presses against the second insulating block to fix the first terminal group and the second terminal group together at intervals, and the tongue is molded on the outside; the contact part of the first terminal group protrudes horizontally upward relative to its fixing part on the surface of the tongue, and the contact part of the second terminal group protrudes horizontally downward relative to its fixing part on the other surface of the tongue; the surface of the tongue is also provided with a matching shielding shell.

[0011] Preferably, the welding portions of the first terminal group and the welding portions of the second terminal group are arranged perpendicular to each other.

[0012] Preferably, the section of the fixing part of the first terminal group near its welding part has a square-cornered protrusion or a rounded-cornered protrusion structure.

[0013] Preferably, the welding portion of the second terminal group has a square-cornered protrusion or a rounded-cornered protrusion structure.

[0014] Preferably, the distance between the protruding structure of the fixing part of the first terminal group and its welding part is wider than the distance between the protruding structures of the welding part of the second terminal group.

[0015] Preferably, the number of the first terminal group is 8 pins.

[0016] Preferably, the number of the second terminal group is 8 pins.

[0017] Preferably, limit pins are also formed on both sides of the shielding shell near the welding part of the first terminal group and the second terminal group.

[0018] In summary, the technical effects and advantages of this utility model are as follows:

[0019] 1. In this solution, the soldering part of the first terminal group extends from the side of the first insulating block, and the soldering part of the second terminal group extends from the bottom of the second insulating block. The spatial orientation of the two sets of soldering parts, which are arranged perpendicularly to each other, allows the soldering part of the first terminal group to be attached and positioned with the pads on the side wall of the PCB window during the insertion action. At the same time, the soldering part of the second terminal group is attached and positioned with the pads on the bottom surface of the PCB. Thus, the alignment of the soldering parts and pads in two directions is completed simultaneously in one insertion and positioning process without separate operation. After assembly, the two sets of soldering parts maintain a fixed spatial angle and positional relationship, which can be directly adapted to the positioning process of the SMT placement machine. This allows the automated equipment to complete the insertion and two-way soldering alignment in one placement, without manual intervention, thus improving production efficiency.

[0020] 2. In this design, the fixing part of the first terminal group has a raised structure near the soldering part, and the soldering part of the second terminal group itself has a raised structure. The raised part forms a controlled support height between the terminal and the pad, so that the soldering part maintains a stable gap with the pad after being inserted into the PCB. This gap ensures that the capillary wetting path of the solder is consistent during reflow soldering, and avoids the terminals and pads being directly pressed together, which would prevent the solder from flowing unevenly. Since the raised structure can provide a stable support height at the solder joint in both directions, the soldering parts in the two orthogonal directions can achieve full wetting simultaneously under the same heating conditions during reflow soldering, thereby improving the quality and consistency of the solder joint.

[0021] 3. In this solution, the first insulating block and the second insulating block are pressed together to firmly fix the first terminal group and the second terminal group together at a predetermined distance, forming an integral rigid structure. This not only eliminates the relative displacement that may occur between the two sets of terminals during assembly and handling, but also provides a unified positioning reference for the spatial position of the terminal soldering parts. During the pick-up and insertion operations of the SMT pick-and-place machine, the tongue shape and the shielding shell are used as external positioning surfaces. At the same time, the soldering parts of the two sets of terminals inside maintain a stable relative position due to the pressing and fixing, thereby ensuring that the soldering parts in both directions can reliably fit with their corresponding pads at the same time during insertion, improving the placement accuracy and reducing the soldering defect rate. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a first-view perspective perspective view of the first embodiment of this utility model.

[0024] Figure 2This is a second-view perspective view of the first embodiment of the present invention.

[0025] Figure 3 This is a perspective view of the internal structure of the first embodiment of the present invention.

[0026] Figure 4 This is a side view of the insulating block according to the first embodiment of the present invention.

[0027] Figure 5 This is a side view of the terminal group according to the first embodiment of the present invention.

[0028] Figure 6 This is a perspective view of the terminal assembly according to the first embodiment of this utility model.

[0029] Figure 7 This is a perspective view of the internal structure of the second embodiment of the present invention.

[0030] Figure 8 This is a perspective view of the insulating block according to the second embodiment of this utility model.

[0031] Figure 9 This is a perspective view of the terminal assembly according to the second embodiment of this utility model.

[0032] In the figure: First terminal group 1, contact part 11 of the first terminal group, fixing part 12 of the first terminal group, welding part 13 of the first terminal group, second terminal group 2, contact part 21 of the second terminal group, fixing part 22 of the second terminal group, welding part 23 of the second terminal group, tongue 3, first insulating block 4, second insulating block 5, shielding shell 6, limit pin 61. Detailed Implementation

[0033] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0034] Please see Figures 1-9 A male connector with a front-to-back mounting design includes a first terminal group 1, a second terminal group 2, and a tongue 3. Both the first terminal group 1 and the second terminal group 2 include a contact portion, a fixing portion, and a soldering portion. The fixing portion 12 of the first terminal group 1 has a protruding structure near its soldering portion 13, and the soldering portion 23 of the second terminal group 2 also has a protruding structure.

[0035] The first terminal group 1 is molded with a matching first insulating block 4 and the solder part 13 of the first terminal group 1 extends from the side of the first insulating block 4; the second terminal group 2 is molded with a matching second insulating block 5 and the solder part 23 of the second terminal group 2 extends from the bottom of the second insulating block 5.

[0036] The first insulating block 4 presses against the second insulating block 5 to fix the first terminal group 1 and the second terminal group 2 together at intervals, and the tongue 3 is molded on the outside; the contact part 11 of the first terminal group 1 protrudes horizontally upward relative to its fixing part 12 on the surface of the tongue 3, and the contact part 21 of the second terminal group 2 protrudes horizontally downward relative to its fixing part 22 on the other surface of the tongue 3; the surface of the tongue 3 is also provided with a matching shielding shell 6.

[0037] Working Principle: The front-mount and rear-mount connector of this solution includes a first terminal group 1, a second terminal group 2, and a tongue 3. Both the first terminal group 1 and the second terminal group 2 are provided with a contact part, a fixing part, and a soldering part. The fixing part 12 of the first terminal group 1 forms a protruding structure near the soldering part 13. This protrusion is used to maintain a specific spatial gap with the PCB pads during assembly, so that the soldering part has a stable positioning height and heat-receiving distance during reflow soldering. The soldering part 23 of the second terminal group 2 has a protruding structure. This protrusion is used to form a controlled solder wetting channel with the PCB pads during rear-mount soldering and to maintain a consistent solder joint height, thereby ensuring soldering reliability. The first terminal group 1 is covered with a matching first insulating block 4, and its solder part 13 extends from the side of the first insulating block 4, so that the solder part of the first terminal group 1 can be aligned with the pads on the side wall of the PCB window when it is installed on the PCB. The second terminal group 2 is covered with a matching second insulating block 5, and its solder part 23 extends from the bottom of the second insulating block 5, so that it can be aligned with the pads on the back of the PCB when it is installed on the PCB. The first insulating block 4 and the second insulating block 5 are pressed together by matching concave structures, fixing the two sets of terminals into a whole in space at a predetermined distance, providing an overall rigid reference for the pick-and-place machine to pick up and position. The externally covered tongue 3 is used to define the relative position of the two sets of contact parts. The contact part 11 of the first terminal group 1 protrudes horizontally upward relative to the fixing part 12 on one side surface of the tongue 3, and the contact part 21 of the second terminal group 2 protrudes horizontally downward relative to the fixing part 22 on the other side surface of the tongue 3, so that the two sets of contact parts are respectively connected to the upper and lower contact surfaces in the insertion direction during use. The shielding shell 6 set on the surface of the tongue 3 serves as a grounding shielding structure electrically and forms a flat adsorption surface mechanically, which facilitates vacuum pick-up by the nozzle of the SMT placement machine.

[0038] During assembly, the connectors in this solution are picked up by a pick-and-place machine and inserted into the front side, so that the side soldering part 13 of the first terminal group 1 and the bottom soldering part 23 of the second terminal group 2 are respectively attached and positioned with the PCB window sidewall pads and the PCB bottom pads. During reflow soldering, the two raised structures simultaneously establish stable gaps and heating conditions at the solder joints in different directions, so that the two orthogonal soldering parts are simultaneously melted and welded in one heating, thereby realizing the automation of the front insertion and back placement process without manual placement or post-soldering, improving production efficiency and reducing the defect rate.

[0039] Preferably, the soldering portion 13 of the first terminal group 1 and the soldering portion 23 of the second terminal group 2 are arranged perpendicularly to each other. This perpendicular arrangement creates an orthogonal arrangement of the two soldering portions in space. The soldering portion 13 of the first terminal group 1 can connect with the lateral pads on the sidewall of the PCB window, and the soldering portion 23 of the second terminal group 2 can connect with the bottom pads on the bottom surface of the PCB. Thus, when the connector is assembled onto the PCB along the insertion direction, the soldering portions in both directions can enter their respective soldering positions under the same insertion force and achieve surface contact positioning with the corresponding pads. This orthogonal arrangement eliminates overlap or interference between the two soldering portions in the direction, allowing the PCB to simultaneously lay out pads on different planes and synchronously wet them during reflow soldering. This reduces pad contamination, solder joint offset, and positional errors caused by multiple assembly steps. Simultaneously, it provides a stable geometric reference in the SMT placement process, ensuring that automated equipment can complete simultaneous soldering of solder joints in both directions after a single pick-and-place and insertion positioning, improving placement efficiency and soldering consistency.

[0040] Preferably, the section of the fixing part 12 of the first terminal group 1 near its welding part 13 has a square-corner protrusion or a rounded-corner protrusion structure. The square-corner protrusion structure forms a vertical interface with the sidewall, creating a clear positioning reference surface with the edge of the PCB window when the connector is inserted into the PCB. This limits the horizontal and vertical offset of the terminal and precisely controls the gap between the welding part and the pad by adjusting the height of the protrusion, ensuring consistency between the solder flow path and the solder joint height during reflow soldering, thus guaranteeing stable solder joint formation. The rounded-corner protrusion structure uses an arc transition instead of a right-angle boundary, allowing for smooth sliding contact with the edge of the PCB window during insertion, reducing jamming and friction during assembly. Simultaneously, the height of the protrusion enables precise control of the gap between the welding part and the pad, and guides the solder to rise and coat evenly during reflow soldering, reducing local stress concentration and improving the fatigue life of the solder joint.

[0041] Preferably, the welding portion 23 of the second terminal group 2 has a square-corner protrusion or a rounded-corner protrusion structure. The square-corner protrusion structure, when the welding portion is attached to the PCB pad, forms a clear positioning boundary with its protruding end face and vertical sidewall, ensuring a stable welding position before reflow soldering. The protrusion height precisely defines the gap between the welding portion and the pad, allowing the solder to expand along a fixed wetting boundary during melting, resulting in uniform and consistent solder joints. The rounded-corner protrusion structure, when the welding portion is inserted and positioned, has a curved end that transitions into contact with the pad or its periphery, reducing frictional resistance and the risk of jamming during assembly. Simultaneously, the protrusion height achieves the same gap control effect as the square-corner protrusion, and guides the solder to continuously climb and coat during reflow soldering, reducing stress concentration at the solder joint and improving its fatigue resistance and service life.

[0042] Preferably, the arched spacing of the fixing portion 12 of the first terminal group 1 near its welding portion 13 is wider than the arched spacing of the welding portions 23 of the second terminal group 2. This design, by forming a laterally wider protrusion at the position of the fixing portion 12 of the first terminal group 1 near the welding portion 13, allows the outer edge of the protrusion to form a larger lateral support span with the PCB window sidewall or limiting surface when the connector is inserted into the PCB, thereby improving the lateral stability of the terminal group in the direction of insertion force and reserving sufficient clearance space for the protrusion structure of the welding portion 23 of the second terminal group 2, avoiding physical interference between the two sets of terminals during the insertion path and positioning process. The larger spacing between the protrusions of the first terminal group 1 allows for a relatively wide solder wetting area and gas venting channel between it and the PCB pads during reflow soldering. This facilitates the uniform spread of solder in its molten state and timely removal of gases generated during the melting process, thereby reducing the risk of defects such as cold solder joints and porosity. In contrast, the protrusions of the second terminal group 2 have a narrower spacing, resulting in a more concentrated contact surface with the corresponding pads. This allows for rapid establishment of capillary wetting in the early stages of heating, enabling the solder to quickly climb along the outer edge of the protrusions and solidify, ensuring precise and controllable solder joint dimensions. This design of varying protrusion spacing ensures smooth insertion and simultaneous positioning of the two sets of terminal solder joints in terms of spatial layout. Furthermore, it achieves stable gap control and optimizes the forming characteristics of solder joints at different positions during the soldering process, thereby improving overall mounting accuracy and soldering reliability.

[0043] Preferably, the first terminal group 1 has 8 pins, and the second terminal group 2 has 8 pins. This design, by setting 8 terminals in the first terminal group 1 and the second terminal group 2 respectively, ensures that the two groups of terminals correspond in number, forming symmetrical 8-channel conductive paths on both sides of the tongue. This facilitates the symmetrical arrangement and impedance matching of high-speed differential signals, power supply terminals, and ground terminals. The uniform number of terminals also facilitates the corresponding placement of the same number of side pads and bottom pads in PCB design, simplifying wiring rules, improving the consistency of signal path length, and reducing latency differences. During SMT assembly, the two groups of 8-pin terminals are fixed by pressing with insulating blocks to form a uniform spacing reference. This allows the pick-and-place machine to simultaneously align the solder joints of all terminal groups with the corresponding pads after one insertion and positioning, ensuring that multi-channel solder joints melt and solidify simultaneously during reflow soldering, thereby improving assembly efficiency and soldering consistency in mass production.

[0044] Preferably, limiting pins 61 are formed on both sides of the shielding shell 6 near the welding portion of the first terminal group 1 and the second terminal group 2. This structure symmetrically provides limiting pins 61 on the left and right sides of the shielding shell 6 adjacent to the welding portion of the first terminal group 1 and the second terminal group 2. During the insertion of the connector into the PCB, these pins can be inserted into corresponding limiting holes or slots on the PCB. Through the interference or clearance fit between the limiting pins 61 and the wall of the limiting hole, the slight displacement of the connector in the horizontal and vertical directions is limited, ensuring precise alignment of the welding portion with the PCB pads during the mounting process. The mechanical positioning function of the limiting pins provides additional posture constraints during the insertion action after the pick-and-place machine picks up the connector, preventing misalignment between the terminals and pads due to assembly tolerances, slight warping of the board surface, or equipment vibration. Simultaneously, the physical stop surface formed by the contact between the limiting pins and the PCB can withstand localized thermal expansion thrust during reflow soldering, preventing terminal position drift during the solder melting stage, thereby maintaining the consistency of the solder joint shape and dimensional stability. This design not only ensures geometric positional accuracy during assembly and welding, but also improves overall strength and durability through its integral molding structure with the shielding housing 6, making it suitable for high-speed automated placement and multiple insertion / removal applications.

[0045] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A front-mounted, rear-mounted connector, comprising a first terminal group, a second terminal group, and a tongue, wherein both the first terminal group and the second terminal group include a contact portion, a fixing portion, and a soldering portion; characterized in that: The fixing part of the first terminal group has a protruding structure near its welding part, and the welding part of the second terminal group has a protruding structure; The first terminal group is molded with a matching first insulating block and the solder portion of the first terminal group extends from the side of the first insulating block; The second terminal group is molded with a matching second insulating block and the solder portion of the second terminal group extends from the bottom of the second insulating block; The first insulating block presses against the second insulating block to fix the first terminal group and the second terminal group together at intervals, and the tongue is molded on the outside; the contact part of the first terminal group protrudes horizontally upward relative to its fixing part on the surface of the tongue, and the contact part of the second terminal group protrudes horizontally downward relative to its fixing part on the other surface of the tongue; the surface of the tongue is also provided with a matching shielding shell.

2. The front-mounted, rear-mounted connector according to claim 1, characterized in that: The welding portions of the first terminal group and the welding portions of the second terminal group are arranged perpendicular to each other.

3. The front-mounted, rear-mounted connector according to claim 2, characterized in that: The section of the fixing part of the first terminal group near its welding part has a square-cornered protrusion or a rounded-cornered protrusion structure.

4. The front-mounted, rear-mounted connector according to claim 2, characterized in that: The welding part of the second terminal group has a square-cornered protrusion or a rounded-cornered protrusion structure.

5. The front-mounted, rear-mounted connector according to claim 2, characterized in that: The distance between the protruding structure of the fixing part of the first terminal group and its welding part is wider than the distance between the protruding structure of the welding part of the second terminal group.

6. The front-mounted, rear-mounted connector according to claim 2, characterized in that: The first terminal group has 8 pins.

7. The front-mounted, rear-mounted connector according to claim 2, characterized in that: The second terminal group has 8 pins.

8. The front-mounted, rear-mounted connector according to claim 1, characterized in that: Limiting pins are also formed on both sides of the shielding shell near the welding part of the first terminal group and the second terminal group.

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