Welding structure for improving reliability of connector

Abstract

The utility model relates to the technical field of connectors, and discloses a welding structure for improving the reliability of a connector, which comprises a PCB (printed circuit board) and the connector, a plurality of welding grooves are arranged on the PCB, the longitudinal section of each welding groove is in the shape of a right trapezoid, a plurality of pins are connected onto the connector, each pin is provided with an inclined plane, and the pins can be placed in the welding grooves. According to the technical scheme of the utility model, the welding reliability can be improved, the situations of continuous welding, insufficient welding and the like can be prevented, and meanwhile, the risks of falling off, deformation and failure of the connector can be reduced in the drawing test process.

Description

Technical Field

[0001] The utility model relates to the technical field of connectors, in particular to a welding structure for improving the reliability of connectors. Background Art

[0002] With the rapid development of the microelectronics industry, the welding and packaging of precision devices has become more and more common, especially the miniaturization demand for hardware such as integrated electronics, and the demand for welding reliability has become higher and higher. The existing welding method is usually to directly weld the connector on the PCB board, that is, the solder paste is stacked on the PCB board to achieve the connection between the connector and the PCB board. The disadvantages of this welding method are: since the connector has many pins and their positions are relatively dense, problems such as continuous welding and cold welding are prone to occur during the welding process; when performing pull-out force testing, since the welding part mainly bears the tension in the Z direction, it is easy to cause the connector to fall off and deform and fail, thereby increasing the manufacturing cost of the enterprise. Utility Model Content

[0003] The utility model aims to provide a welding structure for improving the reliability of connectors, so as to improve the reliability of welding and prevent the occurrence of continuous welding, cold welding and the like. At the same time, during the pull-out test process, the risk of connector falling off and deformation failure can be reduced.

[0004] To achieve the above-mentioned purpose, the utility model adopts the following technical solution: a welding structure for improving the reliability of a connector, comprising a PCB board and a connector, the PCB board is provided with a plurality of welding grooves, the longitudinal section of the welding grooves is in the shape of a right-angled trapezoid, a plurality of pins are connected to the connector, each pin is provided with an inclined surface, and the pins can be placed in the welding grooves.

[0005] The beneficial effect of this solution is: during soldering, first put a tin ball in the soldering groove, and then put the pin on the tin ball so that the inclined surface of the pin corresponds to the inclined surface of the soldering groove. During the soldering process, as the tin ball melts, the pin sinks, and the melted tin ball will fill between the pin and the soldering groove, thereby realizing the soldering of the connector and the PCB board, and the soldering position has high reliability.

[0006] Due to the setting of the soldering groove in the technical solution, during the soldering process, the melted solder ball will remain in the soldering groove and fill between the pin and the soldering groove, thereby increasing the contact area between the pin and the tin, thereby increasing the connection strength between the connector and the PCB board, and preventing the occurrence of poor soldering such as continuous soldering and cold soldering.

[0007] In the technical solution, since the longitudinal section of the soldering groove is in the shape of a right-angled trapezoid and an inclined surface is provided on the pin, it can be seen that during the soldering process, the solder ball will be filled between the pin and the soldering groove after melting, and will be filled between the inclined surface of the pin and the inclined surface of the soldering groove, thereby improving the connection strength between the connector and the PCB board. At the same time, during the pull-out test, the Z-direction tensile force on the tin filled between the inclined surface of the pin and the inclined surface of the soldering groove is decomposed into the X-direction and the Y-direction, thereby reducing the risk of the connector falling off and deformation failure.

[0008] Furthermore, the angle between the inclined surface of the welding groove and the horizontal direction is 40°-50°.

[0009] The beneficial effects of this solution are as follows: this technical solution sets the angle between the inclined surface of the welding groove and the horizontal direction to 40°-50°. On the one hand, it is convenient for processing the welding groove. If the angle between the inclined surface of the welding groove and the horizontal direction is less than 40°, the size of the welding groove will be increased and the processing difficulty of the welding groove will also increase. On the other hand, if the angle between the inclined surface of the welding groove and the horizontal direction is greater than 50°, the pulling resistance in the Z direction will be weakened, which may easily cause the connector to fall off or deform and fail during the pull-out test.

[0010] Furthermore, a connecting groove is provided at the bottom of the pin.

[0011] The beneficial effect of this solution is as follows: due to the setting of the connection groove, during the welding process, the solder ball will enter the connection groove after melting and fill the connection groove, thereby increasing the contact area between the pin and the tin, and further improving the connection strength between the connector and the PCB board.

[0012] Furthermore, the connection groove is in an arch shape, and the size of the connection groove gradually increases toward the side close to the bottom of the pin.

[0013] The beneficial effect of this solution is that: since the connection groove of this technical solution is in an arch shape, the molten solder ball can more easily enter the connection groove and fill the connection groove, thereby preventing the occurrence of cold solder joints.

[0014] Furthermore, the inclined surface of the lead and the inclined surface of the welding groove are parallel to each other.

[0015] The beneficial effect of this solution is: since the inclined surface of the pin and the inclined surface of the welding groove are parallel to each other, when performing a pull-out test, the welding surface formed between the inclined surface of the pin and the inclined surface of the welding groove is subjected to more uniform force, thereby reducing the risk of the connector falling off and deforming and failing.

[0016] Furthermore, the PCB board is in a stepped shape.

[0017] The beneficial effects of this solution are as follows: this technical solution can save materials and reduce production costs by setting the PCB board into a stepped shape, on the one hand, and facilitate integration on the other hand. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A three-dimensional diagram of a welding structure for improving connector reliability according to the utility model;

[0019] Figure 2 It is a longitudinal cross-sectional view of the PCB board of the utility model;

[0020] Figure 3 It is a three-dimensional diagram of the connector pins of the utility model. DETAILED DESCRIPTION

[0021] The following is further described in detail through specific implementation methods:

[0022] The reference numerals in the drawings of the specification include: PCB board 1, welding groove 2, welding groove inclined surface 3, pin 4, pin inclined surface 5, connection groove 6.

[0023] Example

[0024] like Figure 1 A welding structure for improving connector reliability is shown, comprising a PCB board 1 and a connector.

[0025] like Figure 2 As shown, the PCB board 1 is stepped, and a plurality of welding grooves 2 are formed on the PCB board 1. The longitudinal section of the welding groove 2 is in the shape of a right-angled trapezoid. The angle between the inclined surface 3 of the welding groove and the horizontal direction is 40°-50°. In this embodiment, the angle between the inclined surface 3 of the welding groove and the horizontal direction is 45°.

[0026] like Figure 3 As shown, the connector is connected to a plurality of pins 4, the pins 4 are provided with an inclined surface, and the pin inclined surface 5 is parallel to the welding groove inclined surface 3, and a connecting groove 6 is provided at the bottom of the pin 4, the connecting groove 6 is arched, and the size of the connecting groove 6 gradually increases toward the side close to the bottom of the pin 4, and the pin 4 can be placed in the welding groove 2.

[0027] The specific implementation process is as follows:

[0028] During soldering, first put a solder ball into the soldering groove 2, then put the pin 4 on the solder ball, and make the pin inclined surface 5 correspond to the soldering groove inclined surface 3. During the soldering process, as the solder ball melts, the pin 4 sinks, and the melted solder ball will be filled between the pin 4 and the soldering groove 2, so as to realize the soldering of the connector and the PCB board 1, and the soldering position reliability is high.

[0029] The above is only an embodiment of the utility model, and the common knowledge such as the known specific technical solutions and / or characteristics in the solution is not described in detail here. It should be pointed out that for those skilled in the art, without departing from the technical solution of the utility model, several deformations and improvements can be made, which should also be regarded as the protection scope of the utility model, and these will not affect the effect of the implementation of the utility model and the practicality of the patent. The scope of protection required by this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to interpret the content of the claims.

Claims

1. A welding structure for improving connector reliability, characterized in that: The invention comprises a PCB board and a connector. The PCB board is provided with a plurality of welding grooves, the longitudinal section of which is in the shape of a right-angled trapezoid. The connector is connected with a plurality of pins, each of which is provided with an inclined surface, and the pins can be placed in the welding grooves.

2. A welding structure for improving connector reliability according to claim 1, characterized in that: Furthermore, the angle between the inclined surface of the welding groove and the horizontal direction is 40°-50°.

3. A welding structure for improving connector reliability according to claim 2, characterized in that: A connection groove is provided at the bottom of the pin.

4. A welding structure for improving connector reliability according to claim 3, characterized in that: The connecting groove is in an arch shape, and the size of the connecting groove gradually increases toward a side close to the bottom of the pin.

5. A welding structure for improving connector reliability according to claim 4, characterized in that: The inclined surface of the pin and the inclined surface of the welding groove are parallel to each other.

6. A welding structure for improving connector reliability according to claim 5, characterized in that: The PCB board is in a stepped shape.

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