A board end connector with solder joint protection

Abstract

The utility model provides a kind of plate end connector with welding spot protection, including pin sheath and the bent needle inserted in pin sheath, pin sheath side is equipped with the fixed pin for connecting PCB;Fixed pin and pin sheath plug-in cooperation, fixed pin and PCB are welded connection.The utility model is inserted in PCB and pin sheath by setting fixed pin first, and fixed pin is welded with PCB when welding pin, avoid the disadvantage that self-tapping screw is needed to be hit on sheath housing first;And the fixed pin structure is small, light in weight, reaches the need of connector light weight;And fixed pin is compared with previous self-tapping screw, not only save time and labour in welding process, and more easily install, structure is not easily damaged;And fixed pin is welded and fixed, connection is more stable, can also protect pin welding spot from force, compared with self-tapping screw more advantage.

Description

Technical Field

[0001] This utility model relates to the field of connector technology, and in particular to a board-end connector. Background Technology

[0002] A board-end connector is a connector with one end fixed to a circuit board. Most automotive products have board-end connectors installed inside. Power and signal transmission are achieved through the cooperation of board-end connectors and wire-end connectors.

[0003] The core function of a circuit board is to provide mechanical support and electrical connections for electronic components. Strong solder joints are the lifeline of the reliability of electronic equipment; they are the "microscopic bridge" connecting components and the PCB, ensuring not only the unimpeded flow of signals and power but also withstanding various physical and environmental challenges. Their importance is self-evident.

[0004] However, existing board-end connectors often use self-tapping screws on the housing to protect the solder joints, securing them before soldering and facilitating the process. For example... Figure 1 The existing board-end connector 100 shown connects to the existing PCB 200. In the figure, 101 is the solder joint and 102 is the self-tapping screw fixing point. However, the existing board-end connector requires the self-tapping screw to be installed first, which makes the connection process complicated and does not conform to the current trend of connector lightweighting. Summary of the Invention

[0005] To address the aforementioned technical problems, this utility model proposes a board-end connector that also protects solder joints, thereby solving the problem that existing board-end connectors require the installation of self-tapping screws, resulting in a complex connection process and failing to meet current connector lightweight requirements.

[0006] To achieve the above objectives, the technical solution of this utility model is implemented as follows: A board-end connector with solder joint protection includes a pin sleeve and a bent pin inserted into the pin sleeve. A fixing pin for connecting to a PCB is provided on the side of the pin sleeve. The fixing pin is inserted into both the pin sleeve and the PCB, and is soldered to the PCB. This invention avoids the drawback of needing to pre-install self-tapping screws on the sleeve by using a fixing pin that is inserted into both the PCB and the pin sleeve, and then soldered to the PCB during the pin soldering process. Furthermore, the fixing pin is small and lightweight, meeting the requirements for connector weight reduction. Compared to traditional self-tapping screws, the fixing pin is not only faster and easier to install during soldering, but also less prone to structural damage. After soldering, the connection is more stable, and the fixing pin protects the pin solder joints from stress, offering significant advantages over self-tapping screws.

[0007] Furthermore, the insert sheath is provided with a bent needle insert hole for inserting a bent needle and a fixed needle insert hole for inserting a fixed needle, the fixed needle insert hole being a rectangular hole.

[0008] Furthermore, the fixed pin includes a fixed pin body, one end of which is provided with a flat pin three and the other end is provided with a flat solder pin three; the pin three cooperates with the pin sheath; the solder pin three cooperates with the PCB.

[0009] Furthermore, the front end of the third pin is provided with a guide structure, and all four sides of the guide structure are inclined forward and inward.

[0010] Furthermore, the three pins are provided with outwardly protruding barbs on both sides, and the two sides of the fixed pin hole are provided with limiting steps that cooperate with the barbs.

[0011] Furthermore, the fixed pin body has an outwardly protruding shoulder near the solder foot three.

[0012] Furthermore, the welding foot three is provided with reinforcing holes.

[0013] Furthermore, the side of the pin sheath is provided with a circuit board mating boss that abuts against the PCB.

[0014] Furthermore, the bent needle includes a short pin and a long pin, both of which are provided with pins, barbs and solder feet.

[0015] Furthermore, the pin sheath is provided with an interface that mates with the wire end connector, and the interface has an inwardly protruding hook structure; the side of the interface is provided with an anti-misoperation structure that mates with the wire end connector.

[0016] The beneficial effects of this utility model are: 1. The board-end connector of this utility model adopts a fixed pin structure, which is first inserted into the PCB and the pin sleeve, and the fixed pin is soldered to the PCB at the same time when the pin is soldered, avoiding the disadvantage of needing to first install self-tapping screws on the sleeve shell; moreover, the fixed pin structure is small and lightweight, which meets the need for connector lightweighting. 2. The fixed pin structure of the board-end connector of this utility model is more time-saving and labor-saving in the welding process than the previous self-tapping screws. It is also easier to install and the structure is not easily damaged. In addition, the fixed pin is welded to the pin sleeve during welding, which not only makes the connection more stable, but also protects the pin solder joint from stress. It is more advantageous than self-tapping screws. 3. The fixed pin of this utility model has a reinforced hole structure. When the molten solder cools and solidifies in the reinforced hole during welding, it increases the connection area with the PCB, so that the pin sleeve, the fixed pin and the PCB are tightly connected by solder. 4. By setting up an error-proof structure, this utility model not only has a simple error-proof structure, but also can use colored materials for easy visibility and error prevention. It does not require the high cost of developing a variety of wire end connectors to cooperate with it. The entire connection system is relatively simple and conforms to the trend of product lightweighting. 5. This utility model increases the strength of the connection between the pin and the sheath by providing barbs on the pin, making it less likely to fall off; 6. This utility model provides a guide structure on the pin of the fixed pin to ensure that the fixed pin is guided during the assembly process with the pin sheath; 7. This utility model provides a shoulder on the fixed pin, making it the force application point of the tooling during the connection between the fixed pin and the sheath, which facilitates the connection and assembly of the fixed pin and the pin sheath. 8. By using high-temperature resistant materials, this utility model can meet the requirement of successful welding in one pass for both wave soldering and reflow soldering processes, compared to the original product. It can simplify the welding process and reduce costs. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model 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 utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the connection structure between an existing board-end connector and an existing PCB. Figure 2 This is a schematic diagram of the exploded structure of this utility model; Figure 3 This is a top view of the structure of this utility model; Figure 4 This is a schematic diagram of the main structure of the pin sheath of this utility model; Figure 5 for Figure 4 Schematic diagram of the cross-sectional structure of BB; Figure 6 This is a top view of the pin sheath of this utility model. Figure 7 for Figure 6 Schematic diagram of the cross-sectional structure of AA; Figure 8 This is a three-dimensional structural diagram of the pin sheath of this utility model; Figure 9 This is a schematic diagram of the structure of pin one and pin two of this utility model; Figure 10This is a schematic diagram of the structure of the fixing pin of this utility model; Figure 11 This is a schematic diagram of the connection structure between the board-end connector of this utility model and the PCB.

[0019] In the diagram: 100, board-end connector; 101, solder joint; 102, bolt fixing point; 200, existing PCB; 1, pin sleeve; 1-1, interface; 1-1-1, hanging structure; 1-1-2, error prevention structure; 1-2, pin hole one; 1-3, pin hole two; 1-4, fixed pin hole; 1-4-1, pin limiting step; 1-5, circuit board mating boss; 2, pin one; 2-1, pin one; 2-2, barb one; 2-3, solder pin one; 3, pin two; 3-1, pin two; 3-2, barb two; 3-3, solder pin two; 4, fixed pin; 4-1, pin three; 4-2, barb three; 4-3, shoulder; 4-4, solder pin three; 4-5, reinforcing hole; 5, PCB. Detailed Implementation

[0020] 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.

[0021] like Figure 2 As shown in Embodiment 1 of this utility model, a board-end connector that also protects solder joints includes a pin sleeve 1 and a bent pin inserted into the pin sleeve 1. Figure 3 As shown, the side of the pin sleeve 1 is provided with a fixing pin 4 for connecting to the PCB 5. (As shown...) Figure 11 As shown, the fixed pin 4 is inserted into both the pin sleeve 1 and the PCB 5; and the fixed pin 4 is soldered to the PCB 5. During assembly, the fixed pin 4 is first inserted into the PCB and the pin sleeve, serving as an initial connection and positioning element, and is easy to install. Later, when soldering the pins, the fixed pin is also soldered to the PCB, resulting in a more stable connection and protecting the pin solder joints from stress. Furthermore, compared to self-tapping screws, this fixed pin is smaller and lighter, meeting the requirements for connector weight reduction.

[0022] Furthermore, the fixing pin 4 can be mechanically installed in batches by adding a tooling, and this tooling is inexpensive. In contrast, existing technologies require manual installation of self-tapping screws one by one; mechanical installation would be more expensive. Moreover, manual screw driving involves many uncertainties and is prone to misalignment. Therefore, the fixing pin 4 is easier to install and ensures higher installation quality.

[0023] Furthermore, the insert sheath 1 is provided with a bent needle insert hole for inserting a bent needle. In this embodiment, the bent needle includes a short insert 2 and a long insert 3; and the lower bent portion of the short insert 2 is located above the bent portion of the long insert 3. Figure 6 As shown, the bent pin holes on the pin sleeve 1 include a pin hole 1-2 for inserting a short pin 2 and a pin hole 1-3 for inserting a long pin 3. The pin holes 1-2 and 1-3 are arranged in a row.

[0024] Example 2 differs from Example 1 in that, as Figure 10 As shown, the fixed pin 4 includes a fixed pin body, one end of which has a flat pin 4-1 and the other end has a flat solder pin 4-4. Pin 4-1 is used to connect and mate with the pin sleeve 1; solder pin 4-4 is used to connect and mate with the PCB 5.

[0025] like Figure 4 and Figure 5 As shown, the side of the pin sleeve 1 is provided with a fixing pin hole 1-4 for inserting the fixing pin 4. The depth direction of the fixing pin hole 1-4 is perpendicular to the PCB5. The fixing pin hole 1-4 is a rectangular hole that mates with the flat pin 4-1. In this embodiment, the PCB5 is also provided with a small rectangular hole for inserting the solder pin 4-4. In a preferred embodiment, the front ends of the solder pin 4-4 are rounded on both sides to avoid damaging the PCB5 when it is inserted into the PCB5.

[0026] Example 3 differs from Example 2 in that, as Figure 10 As shown, the longitudinal section of pin 3 4-1 is rectangular. The front end of pin 3 4-1 is provided with a guide structure. The guide structure is formed by the four sides of the rectangular front end of pin 3 4-1 gradually extending forward and inward to form a tier. The top of the tier, i.e. the front end of the guide structure, is smaller than the bottom of the tier, which facilitates insertion into the fixing pin hole 1-4.

[0027] Example 4 differs from Example 3 in that, as Figure 10 As shown, the two sides of the pin 4-1 are provided with outwardly protruding barbs 4-2. The front end of the barb 4-2 is connected to the rear end of the guide structure, and the outer slope of the barb 4-2 is smoothly connected to the two short side sides of the guide structure, i.e., the two waists of the platform. The rear end of the barb 4-2 forms an end face with the fixed pin body. The two sides of the fixed pin hole 1-4 are provided with limiting steps 1-4-1 that cooperate with the rear end of the barb 4-2. When the fixed pin 4 is inserted into the fixed pin hole 1-4, the guide structure guides the fixed pin 4 into the fixed pin hole 1-4. The slope of the barb 4-2 assists the barb 4-2 to pass over the limiting steps 1-4-1, and the rear end face of the barb 4-2 abuts against the limiting steps 1-4-1 to prevent the fixed pin 4 from coming out.

[0028] Example 5 differs from Example 4 in that, as Figure 10 As shown, the fixed pin body has an outwardly protruding shoulder 4-3 near the solder foot 4-4. In this embodiment, the shoulder 4-3 is wider than the fixed pin body and also wider than the solder foot 4-4, that is, the two sides of the shoulder 4-3 protrude outward, so that the protruding part of the shoulder 4-3 can be used as the force application part of the tooling during the connection between the fixed pin and the pin sleeve 1.

[0029] Example 6 differs from Example 2 in that, as Figure 10 As shown, the solder foot 4-4 is provided with a reinforcing hole 4-5. When soldering the fixing pin to the PCB, the molten liquid solder cools and solidifies in the reinforcing hole, increasing the connection area with the PCB, so that the pin sleeve, fixing pin and PCB are tightly connected by solder.

[0030] Example 7 differs from Example 1 in that both the short pin 2 and the long pin 3 are provided with pins, barbs, and solder pads. For example... Figure 9 As shown, the short pin 2 has a pin 2-1, a barb 2-2, and a solder joint 2-3. The long pin 3 has a pin 3-1, a barb 3-2, and a solder joint 3-3. Figure 6 and Figure 7 As shown, the pin sheath 1 has pin holes 1-2 and 1-3 for inserting short pins 2 and long pins 3, respectively. Pin hole 1-2 is interference-fitted with the barb 2-2 on the short pin 2. Pin hole 1-3 is interference-fitted with the barb 3-2 on the long pin 3.

[0031] Example 8 differs from Example 1 in that, as Figure 8 As shown, the side of the pin sleeve 1 is provided with a circuit board mating boss 1-5. After the PCB5 is installed, the circuit board mating boss 1-5 abuts against the PCB5, making the PCB5 more stable.

[0032] Example 9 differs from Example 1 in that, as Figure 5 and Figure 6 As shown, the pin sleeve 1 has an interface 1-1 that mates with the wire connector. The interface 1-1 has an inwardly protruding hook structure 1-1-1 inside. The hook structure 1-1-1 is a protrusion that is set at the opening of the interface 1-1 and protrudes inward, which serves to prevent the wire connector from falling off.

[0033] Furthermore, such as Figure 6As shown, one side of interface 1-1 is provided with a mistake-proof structure 1-1-2 that mates with the wire connector. This mistake-proof structure 1-1-2 consists of protrusions of varying widths spaced apart on one side of interface 1-1, forming recesses of varying widths between the protrusions. These protrusions and recesses, located inside one side of interface 1-1, mate with one side of the wire connector, thus preventing incorrect insertion of the wire connector. In another embodiment, the pin sleeve may also be made of a colored material for a more conspicuous and mistake-proof effect.

[0034] In another preferred embodiment, the inner wall on the other side of interface 1-1 is provided with multiple reinforcing ribs to reduce the deformation of the sheath.

[0035] Example 10 differs from Example 1 in that the pin sleeve 1 uses a high-temperature resistant material, which, compared to the original product, can meet the requirement of successful welding in one pass for both wave soldering and reflow soldering processes, thus simplifying the welding process and reducing costs.

[0036] 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 should understand that any modifications to the technical solutions described in the foregoing embodiments, or equivalent substitutions of some or all of the technical features therein, within the spirit and principles of the present utility model, shall not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present utility model, and shall all be included within the protection scope of the present utility model.

Claims

1. A board-end connector that also protects solder joints, characterized in that, It includes a pin sleeve (1) and a bent pin inserted in the pin sleeve (1). The side of the pin sleeve (1) is provided with a fixed pin (4) for connecting the PCB (5). The fixed pin (4) is inserted into both the pin sleeve (1) and the PCB (5), and the fixed pin (4) is soldered to the PCB (5).

2. The board-end connector with solder joint protection according to claim 1, characterized in that, The insert sheath (1) is provided with a bent needle insert hole for inserting bent needles and a fixed needle insert hole (1-4) for inserting fixed needles (4). The fixed needle insert hole (1-4) is a rectangular hole.

3. The board-end connector with solder joint protection according to claim 2, characterized in that, The fixed pin (4) includes a fixed pin body, one end of which is provided with a flat pin three (4-1) and the other end is provided with a flat solder pin three (4-4); the pin three (4-1) cooperates with the pin sleeve (1); the solder pin three (4-4) cooperates with the PCB (5).

4. The board-end connector with solder joint protection according to claim 3, characterized in that, The front end of the third pin (4-1) is provided with a guide structure, and the four sides of the guide structure are inclined forward and inward.

5. The board-end connector with solder joint protection according to claim 3 or 4, characterized in that, The pin three (4-1) has outward protruding barbs three (4-2) on both sides, and the pin fixing hole (1-4) has limiting steps (1-4-1) on both sides that cooperate with the barbs three (4-2).

6. The board-end connector with solder joint protection according to claim 3 or 4, characterized in that, The fixed pin body has an outwardly protruding shoulder (4-3) near the solder foot three (4-4).

7. The board-end connector with solder joint protection according to claim 3 or 4, characterized in that, The welding foot three (4-4) is provided with a reinforcing hole (4-5).

8. The board-end connector with solder joint protection according to any one of claims 1 to 4, characterized in that, The side of the pin sleeve (1) is provided with a circuit board mating boss (1-5) that abuts against the PCB (5).

9. The board-end connector with solder joint protection according to claim 8, characterized in that, The bent needle includes a short pin (2) and a long pin (3), both of which are provided with pins, barbs and weld feet.

10. The board-end connector with solder joint protection according to any one of claims 1 to 4 and 9, characterized in that, The pin sleeve (1) is provided with an interface (1-1) that mates with the wire end connector. The interface (1-1) is provided with an inwardly protruding hook structure (1-1-1). The side of the interface (1-1) is provided with an anti-misoperation structure (1-1-2) that mates with the wire end connector.

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