A fixed welding piece and connector

Abstract

The utility model relates to the field of devices for installing connecting components on equipment or structures, and in particular to fixed soldering pieces and connectors. The fixed soldering piece of the utility model improves the existing fixed soldering piece, and by providing a vertically extending tin-climbing reinforcement section at the edge of the welding connection section, when the fixed soldering piece is welded to the welding surface on the circuit board, not only the welding connection section and the circuit board are welded by solder paste, but also the solder paste can climb upward along the tin-climbing reinforcement section and weld its vertical side surface. Compared with the original fixed soldering piece, the fixed soldering piece of the utility model increases the welding area, and at the same time, the original welding surface is improved from only a horizontal surface to a three-dimensional welding structure including a horizontal welding surface and a vertical welding surface, which greatly improves the reliability of welding fixation without increasing the occupied area of ​​the fixed soldering piece on the circuit board.

Description

Technical Field

[0001] The utility model relates to the field of devices for installing connecting components on equipment or structures, in particular to a fixing welding piece and a connector. Background Art

[0002] As the demand for miniaturization of electronic communication equipment becomes more and more prominent, the size of the connectors used on the circuit boards therein is also getting smaller and smaller. For these low-profile and miniaturized surface-mount products, they are often fixed on the circuit board by means of fixed soldering plates welded on the circuit board. For example, an electrical connector disclosed in the Chinese invention patent application with application publication number CN102694317A is a surface-mount connector, and its retaining member is an integral sheet structure, including a vertically extending portion and a bent portion at the lower end of the vertically extending portion. The vertically extending portion is used to fit with the connector housing to form a housing connection section, and the bent portion is used to solder with the welding area on the circuit board to form a welding connection section.

[0003] However, since the electrical components on the circuit board are generally arranged densely, the horizontal extension of the welding connection section is often small, which leads to a small welding area. Although the edge of the welding connection section has a notch to allow the solder to spread upward to the upper surface of the welding connection section during welding, which increases the welding area to a certain extent, the actual fixing effect is not ideal. Therefore, the existing fixing solder piece has a weak fixing effect on the connector as a whole, especially when used in a vibration environment, the reliability of the fixed connection between the connector and the printed circuit board is poor. Utility Model Content

[0004] The purpose of the utility model is to provide a fixing welding piece to solve the problem that the welding area between the existing fixing welding piece and the circuit board is small and the reliability of the fixing connection is poor. At the same time, the purpose of the utility model is also to provide a connector, including the fixing welding piece of the utility model, to solve the problem that the reliability of the existing connector on the circuit board is poor.

[0005] The fixed welding sheet of the utility model comprises a sheet body, which comprises a shell connecting section extending vertically and a welding connecting section bent out from the lower end of the shell connecting section. At least part of the edge of the welding connecting section has a vertically extending tin climbing reinforcement section to allow the solder to vertically climb along its surface during welding.

[0006] Furthermore, the tin-creeping reinforcement section is located at an edge of a side of the welding connection section opposite to the shell connection section.

[0007] Furthermore, a notch is provided at an edge of the welding connection section on one side opposite to the shell connection section, and the tin creeping reinforcement section is provided on the edge on at least one side of the notch.

[0008] Furthermore, the tin creeping reinforcement section and the welding connection section are transitioned through an arc section, so that a wetting angle between 15° and 45° is formed between the fixed welding piece and the welding surface on the circuit board.

[0009] Furthermore, the extension height of the tin-climbing reinforcement section is lower than the extension height of the shell connecting section.

[0010] The fixed welding piece of the utility model improves the existing fixed welding piece, and by arranging a vertically extending tin-climbing reinforcement section at the edge part of the welding connection section, when the fixed welding piece is welded to the welding surface on the circuit board, not only the welding connection section and the circuit board are welded by solder paste, but the solder paste can also climb upward along the tin-climbing reinforcement section and weld and connect its vertical side surface. Compared with the original fixed welding piece, the fixed welding piece of the utility model increases the welding area, and at the same time, the original welding surface which is only a horizontal surface is improved to a three-dimensional welding structure including a horizontal welding surface and a vertical welding surface. Under the premise of not increasing the occupied area of ​​the fixed welding piece on the circuit board, the reliability of welding fixation is greatly improved.

[0011] The connector of the utility model comprises a connector shell, and a fixed welding piece is fixedly installed at the end of the connector shell. The fixed welding piece comprises a sheet body, and the sheet body comprises a vertically extending shell connecting section and a welding connecting section bent out from the lower end of the shell connecting section. At least part of the edge of the welding connecting section has a vertically extending tin climbing reinforcement section to allow the solder to vertically climb along its surface during welding.

[0012] Furthermore, the tin-creeping reinforcement section is located at an edge of a side of the welding connection section opposite to the shell connection section.

[0013] Furthermore, a notch is provided at an edge of the welding connection section on one side opposite to the shell connection section, and the tin creeping reinforcement section is provided on the edge on at least one side of the notch.

[0014] Furthermore, the tin creeping reinforcement section and the welding connection section are transitioned through an arc section, so that a wetting angle between 15° and 45° is formed between the fixed welding piece and the welding surface on the circuit board.

[0015] Furthermore, the extension height of the tin-climbing reinforcement section is lower than the extension height of the shell connecting section.

[0016] The connector of the present invention improves the existing connector, especially improves the structure of the fixed welding piece, and provides a vertically extending tin-climbing reinforcement section at the edge part of the welding connection section, so that when the fixed welding piece is welded to the welding surface on the circuit board, not only the welding connection section and the circuit board are welded by solder paste, but also the solder paste can climb upward along the tin-climbing reinforcement section and weld its vertical side surface. Compared with the original fixed welding piece, the fixed welding piece of the present invention increases the welding area, and at the same time, it is improved from the original welding surface which is only a horizontal surface to a three-dimensional welding structure including a horizontal welding surface and a vertical welding surface. Under the premise of not increasing the occupied area of ​​the fixed welding piece on the circuit board, the reliability of welding fixation between the connector and the circuit board is greatly improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic structural diagram of the first embodiment of the connector of the utility model when it is installed on a circuit board;

[0018] Figure 2 for Figure 1 Schematic diagram of the structure of the fixed welding piece;

[0019] Figure 3 for Figure 1 A structural schematic diagram of another perspective of the fixed welding piece;

[0020] Figure 4 This is a schematic structural diagram of the embodiment 1 of the connector of the utility model when realizing the connection between two circuit boards;

[0021] Figure 5 for Figure 4 The enlarged view of the first viewing angle of the fixed soldering piece position is shown in FIG.

[0022] Figure 6 for Figure 4 The enlarged view of the second viewing angle showing the fixed soldering piece position is shown in FIG.

[0023] Figure 7 It is a structural schematic diagram of another embodiment of fixing the welding piece.

[0024] In the figure: 1, circuit board; 10, solder pad; 20, socket housing; 21, contact piece; 3, fixed solder piece; 30, housing connection section; 301, clamping protrusion; 31, welding connection section; 32, tin climbing reinforcement section; 33, arc transition section; 34, notch; 4, plug connector. DETAILED DESCRIPTION

[0025] The features and performance of the present invention are further described in detail below in conjunction with the embodiments.

[0026] The connector of the utility model is mainly aimed at low-profile and miniaturized surface-mount connectors fixed on circuit boards, especially long strip-shaped connectors that are fixed by welding the fixed welding pieces installed at both ends of the connector housing to the pads on the circuit board. The existing connectors of this type are small in size and there are often many electrical components densely arranged on the circuit board, so the installation space that can be provided is small. For example, in the prior art cited in the background technology, the area of ​​the welding connection section of the fixed welding pieces fixedly installed at both ends of the connector housing is often small, that is, it avoids having a large size extending from the length direction of the connector housing. However, the welding area between the welding connection section and the pad is naturally small, which will have an adverse effect on the welding reliability of the connector. Especially when used in a vibration environment, the connector is easy to detach from the circuit board.

[0027] When soldering is used for welding, the solder paste tends to creep along the surface of the welded parts. The connector of the utility model utilizes this rule to improve the existing connector. By changing the structure of the fixed solder piece, the soldering area of ​​the fixed solder piece is increased without increasing the installation area occupied by the fixed solder piece on the circuit board, thereby improving the reliability of the welding. Specifically, in the connector of the utility model, if Figure 1-3 As shown, the fixing welding piece 3 is similar to the existing fixing welding piece as a whole, including a shell connecting section 30 and a welding connecting section 31. The shell connecting section 30 is also used for fixing and connecting with the connector shell, such as forcing, and the welding connecting section 31 is also used for welding and connecting with the pad 10 on the circuit board 1. The sheet corresponding to the shell connecting section 30 extends in one direction. Since it is mostly extended in the up and down directions when in use, the shell connecting section 30 is defined to extend vertically. The lower end of the shell connecting section 30 has a portion that is bent and extended toward one side of the sheet, which is the welding connecting section 31. The shell connecting section 30 is provided with a clamping protrusion 301 on both sides of the width direction thereof. The shell connecting section 30 is used to be forcing and inserting into the insertion hole on the connector shell, so as to realize the fixed installation of the fixing welding piece 3 on the connector shell. The welding connecting section 31 is used to be placed flat on the pad 10 on the circuit board 1 when in use, so as to be soldered with the pad 10.

[0028] The fixing welding piece 3 of the connector of the utility model is different from the fixing welding piece 3 of the prior art in that a vertically extending tin-climbing reinforcement section 32 is bent at a part of the edge or the entire edge of the welding connection section 31, and the extension direction of the tin-climbing reinforcement section 32 is substantially the same as the extension direction of the shell connection section 30, and is located on the same side of the welding connection section 31 as the shell connection section 30. As the name implies, the tin-climbing reinforcement section 32 is used to facilitate tin-climbing during welding, and by allowing the solder to climb to this section, the combined welding area of ​​the solder and the entire fixing welding piece 3 can be increased, thereby improving the welding reliability of the fixing welding piece 3.

[0029] Based on the above main concepts, different embodiments are provided below for illustration.

[0030] like Figure 1-3 As shown, in the first embodiment, the connector is a socket connector, including a long strip connector housing and a contact 21 installed in the connector housing. One side of the connector is a plug port, and the other side is a connection end for conductive connection with the circuit board 1. The fixed soldering piece 3 is strongly installed at both ends of the connector housing and is used to be soldered on the soldering pad 10 on the circuit board 1. The fixed soldering pieces 3 at the left and right ends of the connector adopt a common mode design, which not only reduces the cost, but also ensures the symmetry of the product structure, and avoids the asymmetry of the two fixed soldering pieces 3 of the product causing uneven force during the connector welding process and causing deflection. A tin creeping reinforcement section 32 is provided at the edge position of the side opposite to the shell connection section 30 on the welding connection section 31 of the fixed soldering piece 3. This position is located outside the end of the connector shell as a whole. The tin creeping reinforcement section 32 is set at this position without interfering with the connector shell, and there is no need to change the structure of the connector shell. The whole is exposed to the external space, which is conducive to tin creeping. Of course, in other embodiments, the tin creeping reinforcement section 32 can also be set at the edge position of the welding connection section 31 adjacent to the shell connection section 30.

[0031] The welding connection section 31 is bent and extended perpendicularly to the shell connection section 30, and is used to fit on the soldering pad 10. In order to facilitate the solder paste on the soldering pad 10 to climb to the upper surface of the welding connection section 31 during welding, and gradually fill the space enclosed between the tin climbing reinforcement section 32 and the side wall of the socket shell 20, a notch 34 is provided on the edge of the side of the welding connection section 31 facing away from the shell connection section 30. When the tin climbing reinforcement section 32 is set at the side edge position opposite to the shell connection section 30, it can be Figure 2-3 A tin creeping reinforcement section 32 is provided on one side of the notch 34 as shown, or as Figure 7 As shown, the creeping tin reinforcement sections 32 are arranged on both sides of the notch 34. Of course, when the creeping tin reinforcement sections 32 are arranged on both sides of the notch 34, the welding bonding area of ​​the solder and the fixing welding piece 3 is larger.

[0032] On the basis of the above-mentioned embodiments, in a more preferred embodiment, the tin climbing reinforcement section 32 and the welding connection section 31 are connected by a circular arc transition, that is, there is a circular arc transition section 33 between the two. By setting the circular arc transition section 33, the tin climbing area is further increased, and at the same time, a wetting angle θ between 15° and 45° can be formed between the fixed solder piece 3 and the welding surface on the circuit board 1, thereby improving the wettability of welding, so that the molten solder can climb to the surface of the fixed solder piece 3 in a uniform and continuous manner; that is, the solder will not only climb between the tin climbing reinforcement section 32 and the side wall of the socket housing 20, but also climb to the side of the tin climbing reinforcement section 32 facing away from the socket housing 20, so that the 360° circumference of the tin climbing reinforcement section 32 is covered with a circle of solder, thereby improving the welding reliability. Of course, in other embodiments, it is not excluded that the tin climbing reinforcement section 32 and the welding connection section 31 are connected by an inclined section transition, or directly connected at a right angle.

[0033] like Figure 2 In the embodiment shown, the extension height of the tin climbing reinforcement section 32 is lower than the extension height of the shell connecting section 30. In this way, while meeting the tin climbing requirement, the tin climbing reinforcement section 32 will not be too high and occupy a large space. At the same time, the tin climbing reinforcement section 32 and the shell connecting section 30 are at different heights. When there is only one tin climbing reinforcement section 32 and it is arranged opposite to the shell connecting section 30, it is easy to identify. Of course, whichever is higher or the same height is set, it falls within the protection scope of the utility model.

[0034] In the above embodiment, the connector is a socket connector. In other embodiments, the connector may be a plug connector 4, such as Figure 4-6 The structure of a plug connector 4 of the utility model and a socket connector of the utility model in a plugged state is shown.

[0035] The embodiment of the fixing welding piece of the present invention has the same specific structure as the fixing welding piece structure in the embodiment of the connector introduced above, and will not be further described herein.

[0036] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. The patent protection scope of the present invention shall be based on the claims. All equivalent structural changes made using the description and drawings of the present invention shall be included in the protection scope of the present invention.

Claims

1. A fixed welding sheet, comprising a sheet body, the sheet body comprising a shell connecting section (30) extending vertically and a welding connecting section (31) bent out from the lower end of the shell connecting section (30), wherein: At least part of the edge of the welding connection section (31) has a vertically extending tin climbing reinforcement section (32) to allow the solder to vertically climb along its surface during welding.

2. The fixing welding piece according to claim 1, characterized in that: The tin-climbing reinforcement section (32) is located at an edge of a side of the welding connection section (31) opposite to the shell connection section (30).

3. The fixing welding piece according to claim 2, characterized in that: The welding connection section (31) has a notch (34) at one edge opposite to the housing connection section (30), and the tin-climbing reinforcement section (32) is provided on the edge on at least one side of the notch (34).

4. The fixing welding piece according to any one of claims 1 to 3, characterized in that: The tin creeping reinforcement section (32) and the welding connection section (31) are transitioned via an arc section, so that a wetting angle between 15° and 45° is formed between the fixed welding piece (3) and the welding surface on the circuit board (1).

5. The fixing welding piece according to any one of claims 1 to 3, characterized in that: The extension height of the tin-climbing reinforcement section (32) is lower than the extension height of the housing connection section (30).

6. A connector, comprising a connector housing, a fixed welding piece (3) being fixedly mounted at an end of the connector housing, the fixed welding piece (3) comprising a sheet body, the sheet body comprising a vertically extending housing connection section (30) and a welding connection section (31) bent out from the lower end of the housing connection section (30), wherein: At least part of the edge of the welding connection section (31) has a vertically extending tin climbing reinforcement section (32) to allow the solder to vertically climb along its surface during welding.

7. The connector according to claim 6, characterized in that: The tin-climbing reinforcement section (32) is located at an edge of a side of the welding connection section (31) opposite to the shell connection section (30).

8. The connector according to claim 7, characterized in that: The welding connection section (31) has a notch (34) at one edge opposite to the housing connection section (30), and the tin-climbing reinforcement section (32) is provided on the edge on at least one side of the notch (34).

9. The connector according to any one of claims 6 to 8, characterized in that: The tin creeping reinforcement section (32) and the welding connection section (31) are transitioned via an arc section, so that a wetting angle between 15° and 45° is formed between the fixed welding piece (3) and the welding surface on the circuit board (1).

10. The connector according to any one of claims 6 to 8, characterized in that: The extension height of the tin-climbing reinforcement section (32) is lower than the extension height of the housing connection section (30).

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