Narrow terminal for preventing scaling powder from climbing

Abstract

The utility model relates to the technical field of SMT (Surface Mount Technology), in particular to a narrow terminal for preventing scaling powder from climbing, which comprises a terminal main body, a welding part arranged at the bottom of the terminal main body, and a contact surface part arranged on the terminal main body and positioned above the welding part, and a blocking step is convexly arranged between the welding part and the contact surface part; according to the utility model, the climbing path of the soldering flux can be prolonged, the soldering flux can be ensured not to climb upwards to the contact surface part in the manufacturing process, the condition of poor products caused by the fact that the soldering flux climbs upwards to the contact surface part can be avoided, and the yield can be greatly improved.

Description

Technical Field:

[0001] The utility model relates to the technical field of SMT chip mounting, in particular to a narrow terminal for preventing the upward climbing of solder flux. Background Art:

[0002] SMT (Surface Mounting Technology) is one of the most commonly used technologies and processes in the current electronic assembly industry. Its characteristics are: high assembly density, small volume and light weight of electronic products. The volume and weight of surface mount components are only about 1 / 10 of those of traditional inserted components. Generally, after adopting SMT, the volume of electronic products is reduced by 40% - 60%, and the weight is reduced by 60% - 80%.

[0003] As Figure 1 shown, an existing narrow terminal includes a terminal body, a welding part arranged at the bottom of the terminal body, and a contact surface part arranged on the terminal body and above the welding part. Since solder flux has benefits such as removing oxides, reducing the surface tension of the welded material, protecting the welded base material, making the solder joints beautiful, and assisting heat conduction when welding terminals, solder flux is often used when welding the welding part. When solder flux is used, a siphon phenomenon will occur, that is, the solder flux will climb upward along the welding part, and when the solder flux climbs upward to the contact surface part, it will cause poor contact. There is an urgent need for a narrow terminal for preventing the upward climbing of solder flux that can ensure the yield rate. Content of the Utility Model:

[0004] The purpose of the utility model is to provide a narrow terminal for preventing the upward climbing of solder flux in view of the deficiencies of the existing technology, which can extend the climbing path of the solder flux, ensure that the solder flux cannot climb upward to the contact surface part during the manufacturing process, avoid the situation of product defects caused by the upward climbing of the solder flux to the contact surface part, and greatly improve the yield rate.

[0005] To achieve the above purpose, the technical solution adopted by the utility model is: a narrow terminal for preventing the upward climbing of solder flux, including a terminal body, a welding part arranged at the bottom of the terminal body, and a contact surface part arranged on the terminal body and above the welding part, and a blocking step is convexly arranged between the welding part and the contact surface part.

[0006] For further improvement of the above solution, the blocking step is arranged at the top position of the welding part, and the width of the blocking step is greater than or equal to the width of the welding part.

[0007] For further improvement of the above solution, the blocking step includes a first step stage connected to the welding part, a second step stage connected to the first step stage, and a third step stage connected to the second step stage.

[0008] A further improvement to the above solution is that the first stage is set obliquely upward, the second stage is set horizontally, and the third stage is set obliquely downward.

[0009] A further improvement to the above solution is that the angle of the first stage obliquely upward is 30 - 60°, and the angle of the second stage obliquely downward is 30 - 60°.

[0010] A further improvement to the above solution is that the first stage and the second stage are symmetrically arranged, and the overall structure of the blocking step is an isosceles trapezoid.

[0011] A further improvement to the above solution is that the height difference between the second stage and the welding part is greater than or equal to 0.3 mm.

[0012] A further improvement to the above solution is that the length of the first stage is greater than or equal to 0.6 mm, the length of the second stage is greater than or equal to 0.6 mm, and the length of the third stage is greater than or equal to 0.6 mm.

[0013] A further improvement to the above solution is that the blocking step and the terminal body are of an integral structure.

[0014] A further improvement to the above solution is that there are at least two blocking steps, and the blocking steps are arranged side by side in the vertical direction.

[0015] The beneficial effect of the present utility model is as follows: A narrow terminal for preventing the climbing of solder paste provided by the present utility model includes a terminal body, a welding part provided at the bottom of the terminal body, and a contact surface part provided on the terminal body and above the welding part. A blocking step is convexly provided between the welding part and the contact surface part;

[0016] A blocking step is convexly provided between the welding part and the contact surface part of the present utility model. The solder paste on the welding part needs to pass through the blocking step first when climbing upward to the contact surface part. The blocking step can extend the climbing path of the solder paste, ensure that the solder paste cannot climb upward to the contact surface part during the manufacturing process, avoid the situation of product defects caused by the upward climbing of the solder paste to the contact surface part, and greatly improve the yield rate. Description of the drawings:

[0017] Figure 1 It is a schematic structural diagram of an existing narrow terminal.

[0018] Figure 2 It is a schematic structural diagram of the present utility model.

[0019] Figure 3 It is a schematic structural diagram of another perspective of the present utility model.

[0020] Figure 4This is a schematic structural diagram of Embodiment 2 of the present utility model.

[0021] Explanation of reference numerals in the drawings: terminal body 1, soldering part 2, contact surface part 3, blocking step 4, first step stage 41, second step stage 42, third step stage 43. Specific implementation manner:

[0022] Embodiment 1, as Figure 2-3 shown, the present utility model includes a terminal body 1, a soldering part 2 provided at the bottom of the terminal body 1, and a contact surface part 3 provided on the terminal body 1 and above the soldering part 2. A blocking step 4 protrudes between the soldering part 2 and the contact surface part 3; a blocking step 4 protrudes between the soldering part 2 and the contact surface part 3 of the present utility model. The flux on the soldering part 2 needs to pass through the blocking step 4 first when climbing upward to the contact surface part 3. By means of the blocking step 4, the climbing path of the flux can be extended, which can ensure that the flux cannot climb upward to the contact surface part 3 during the manufacturing process, can avoid the situation of product defects caused by the flux climbing upward to the contact surface part 3, and can greatly improve the yield rate.

[0023] The blocking step 4 is provided at the top position of the soldering part 2, and the width of the blocking step 4 is greater than or equal to the width of the soldering part 2. The blocking step 4 can effectively block the climbing of the flux, and can better ensure that the flux cannot climb upward to the contact surface part 3 during the manufacturing process.

[0024] The blocking step 4 includes a first step stage 41 connected to the soldering part 2, a second step stage 42 connected to the first step stage 41, and a third step stage 43 connected to the second step stage 42. The flux needs to pass through the first step stage 41, the second step stage 42, and the third step stage 43 of the blocking step 4 in sequence when climbing upward to the contact surface part 3.

[0025] The first stage 41 is arranged obliquely upward, the second stage 42 is arranged horizontally, and the third stage 43 is arranged obliquely downward. The preferably upward oblique angle of the first stage 41 is 30 - 60°, and the preferably downward oblique angle of the second stage 42 is 30 - 60°. The first stage 41 and the second stage 42 are symmetrically arranged. The blocking step 4 as a whole has an isosceles trapezoid structure. The height difference between the second stage 42 and the welding part 2 is preferably greater than or equal to 0.3 mm. The length of the first stage 41 is preferably greater than or equal to 0.6 mm. The length of the second stage 42 is preferably greater than or equal to 0.6 mm. The length of the third stage 43 is preferably greater than or equal to 0.6 mm. In this embodiment, the upward oblique angle of the first stage 41 is 34°, the downward oblique angle of the second stage 42 is 34°, the height difference between the second stage 42 and the welding part 2 is 0.45 mm, the length of the first stage 41 is 0.81 mm, the length of the second stage 42 is 0.9 mm, and the length of the third stage 43 is 0.81 mm, which can well ensure that the flux cannot climb upward to contact the contact surface 3 during the manufacturing process.

[0026] The blocking step 4 and the terminal body 1 are of an integral structure, which is not only convenient for processing, but also has fewer overall parts and is convenient for assembly.

[0027] Embodiment 2, as Figure 4 shown, the difference between this embodiment and Embodiment 1 is that there are at least two blocking steps 4 in this embodiment, and the blocking steps 4 are arranged side by side in the vertical direction, which can further extend the climbing path of the flux and can better ensure that the flux cannot climb upward to contact the contact surface 3 during the manufacturing process; the rest are the same as those in Embodiment 1 and will not be elaborated here.

[0028] Working principle:

[0029] The flux on the welding part 2 needs to pass through the blocking step 4 first when climbing upward to the contact surface 3. The blocking step 4 can extend the climbing path of the flux, ensure that the flux cannot climb upward to the contact surface 3 during the manufacturing process, avoid the situation of product defects caused by the flux climbing upward to the contact surface 3, and can greatly improve the yield rate.

[0030] Of course, the above are only the preferred embodiments of the present invention. Therefore, all equivalent changes or modifications made according to the structures, features, and principles described in the scope of the patent application of the present invention are included in the scope of the patent application of the present invention.

Claims

1. A narrow terminal for preventing the climbing of solder flux, comprising a terminal body (1), a welding part (2) arranged at the bottom of the terminal body (1), and a contact surface part (3) arranged on the terminal body (1) and above the welding part (2), characterized in that: A blocking step (4) protrudes between the welding part (2) and the contact surface part (3).

2. The narrow terminal for preventing the climbing of solder flux according to claim 1, wherein: The blocking step (4) is arranged at the top position of the welding part (2), and the width of the blocking step (4) is greater than or equal to the width of the welding part (2).

3. A narrow terminal for preventing the climb of solder flux according to claim 1, characterized in that: The blocking step (4) includes a first step stage (41) connected to the welding part (2), a second step stage (42) connected to the first step stage (41), and a third step stage (43) connected to the second step stage (42).

4. The narrow terminal for preventing the climbing of the solder flux according to claim 3, characterized in that: The first step stage (41) is arranged obliquely upward, the second step stage (42) is arranged horizontally, and the third step stage (43) is arranged obliquely downward.

5. The narrow terminal for preventing the climbing of solder flux according to claim 4, wherein: The angle of the first step stage (41) obliquely upward is 30 - 60°, and the angle of the second step stage (42) obliquely downward is 30 - 60°.

6. A narrow terminal for preventing the climbing of solder flux according to claim 4, characterized in that: The first step stage (41) and the second step stage (42) are symmetrically arranged, and the blocking step (4) as a whole has an isosceles trapezoid structure.

7. A narrow terminal for preventing solder flux from climbing, according to claim 4, characterized in that: The height difference between the second step stage (42) and the welding part (2) is greater than or equal to 0.3 mm.

8. A narrow terminal for preventing the climb of solder flux according to claim 4, characterized in that: The length of the first step stage (41) is greater than or equal to 0.6 mm, the length of the second step stage (42) is greater than or equal to 0.6 mm, and the length of the third step stage (43) is greater than or equal to 0.6 mm.

9. A narrow terminal for preventing the climb of solder flux according to claim 1, characterized in that: The blocking step (4) and the terminal body (1) are of an integral structure.

10. A narrow terminal for preventing the climb of solder flux according to any one of claims 1-9, characterized in that: There are at least two blocking steps (4), and the blocking steps (4) are arranged side by side in the vertical direction.

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