Fixing clamp used for welding of buttons on button board and welding method

Abstract

The invention discloses a fixing clamp used for welding of buttons on a button board and a welding method. The clamp comprises a base plate, wherein a plurality of stepped holes distributed in an array mode are formed in the base plate, the shapes of the stepped holes are matched with the appearances of the buttons needing welding, a row of mounting holes is formed between every two adjacent rows of stepped holes, and the stepped holes and the mounting holes are distributed at intervals. When pins are welded through the clamp, the buttons cannot deflect, and the quality of the welded button board is effectively improved; clamping of the button board can be achieved through limiting edges, the phenomenon that the button board slides or deflects is avoided, and welding precision is improved effectively; the buttons do not interfere with other components; the stepped holes can be used for self-inspection of the buttons; the limiting edges are in a segmented structure, the button board can be taken down rapidly and conveniently from fractured positions, and the situation that the button board is damaged or fractured because the button board bears force unevenly when taken from one corner is avoided.

Description

technical field

[0001] The invention relates to the technical field of component welding on a printed circuit board, in particular to a fixing fixture and a welding method for welding keys on a key board. Background technique

[0002] At present, when it is necessary to solder and install buttons on the button circuit board, it is generally necessary to design reserved via holes (pin holes) when printing the button board, then insert the pins of the buttons through the via holes, and finally complete the soldering of the pins Button installation. However, due to the large number of button pins (generally 4 to 8), it is necessary to insert all the pins into the via holes on the circuit board when installing and soldering the keys. The size of the via hole should be at least 0.4mm larger than the pin size. . And after inserting the pins of the button into the via hole of the circuit board, the limit is fixed by the limit mechanism such as the welding limit column at the bott...

Examples

Embodiment 1

[0050] Example 1: When it is necessary to weld 20 keys 7 distributed in 4×5 on the five-slice key board, take the pin 9 of the key 7 and insert it into the center of the via hole to compress the height after welding, the length of the key board 10 and the five-screw key The width of plate, remove seat plate 1 height with the distance greater than button 7 height 1mm, but the length and width of seat plate 1 with the distance of 5mm more than key plate 10 length and five spell key plate width respectively. The extra 5mm side of length and width divides the two sides equally, leaving a 0.1mm installation gap for each, and then designing a limit side 3 with a width of 2.4mm and a height 0.5mm higher than the thickness of the keypad 10, to limit the placement range of the keypad 10, The key board 10 needs to print a metal edge with a width of about 2 mm on the side board and the mounting hole 5 to prevent the key board 10 from being damaged by static electricity.

[0051] When in ...

Embodiment 2

[0052] Example 2: When it is necessary to weld 40 keys 7 distributed in 8×5 on the five-slice key board, take the pin 9 of the key 7 and insert it into the center of the via hole to compress the height after welding, the length of the key board 10 and the five-screw key The width of plate, remove seat plate 1 height with the distance greater than button 7 height 1.5mm, but the length and width of seat plate 1 with respectively more than 5mm of key plate 10 lengths and five spell key plate widths. The extra 5mm side of length and width divides the two sides equally, leaving a 0.1mm installation gap for each, and then designing a limit side 3 with a width of 2.4mm and a height 0.5mm higher than the thickness of the keypad 10, to limit the placement range of the keypad 10, The key board 10 needs to print a metal edge with a width of about 2 mm on the side board and the mounting hole 5 to prevent the key board 10 from being damaged by static electricity.

[0053] When in use, firs...

Embodiment 3

[0054] Example 3: When it is necessary to weld 30 keys 7 distributed in 6×5 on the five-slice key board, take the pin 9 of the key 7 and insert it into the center of the via hole to compress the height after welding, the length of the key board 10 and the five-screw key The width of plate, go seat plate 1 height with the distance greater than button 7 height 2mm, but the length and width of seat plate 1 with the distance of 5mm more than key plate 10 length and five spell key plate width respectively. The extra 5mm side of length and width divides the two sides equally, leaving a 0.1mm installation gap for each, and then designing a limit side 3 with a width of 2.4mm and a height 0.5mm higher than the thickness of the keypad 10, to limit the placement range of the keypad 10, The key board 10 needs to print a metal edge with a width of about 2 mm on the side board and the mounting hole 5 to prevent the key board 10 from being damaged by static electricity.

[0055] When in use,...

technical field

[0001] The invention relates to the technical field of component welding on a printed circuit board, in particular to a fixing fixture and a welding method for welding keys on a key board. Background technique

[0002] At present, when it is necessary to solder and install buttons on the button circuit board, it is generally necessary to design reserved via holes (pin holes) when printing the button board, then insert the pins of the buttons through the via holes, and finally complete the soldering of the pins Button installation. However, due to the large number of button pins (generally 4 to 8), it is necessary to insert all the pins into the via holes on the circuit board when installing and soldering the keys. The size of the via hole should be at least 0.4mm larger than the pin size. . And after inserting the pins of the button into the via hole of the circuit board, the limit is fixed by the limit mechanism such as the welding limit column at the bott...

Examples

Embodiment 1

[0050] Example 1: When it is necessary to weld 20 keys 7 distributed in 4×5 on the five-slice key board, take the pin 9 of the key 7 and insert it into the center of the via hole to compress the height after welding, the length of the key board 10 and the five-screw key The width of plate, remove seat plate 1 height with the distance greater than button 7 height 1mm, but the length and width of seat plate 1 with the distance of 5mm more than key plate 10 length and five spell key plate width respectively. The extra 5mm side of length and width divides the two sides equally, leaving a 0.1mm installation gap for each, and then designing a limit side 3 with a width of 2.4mm and a height 0.5mm higher than the thickness of the keypad 10, to limit the placement range of the keypad 10, The key board 10 needs to print a metal edge with a width of about 2 mm on the side board and the mounting hole 5 to prevent the key board 10 from being damaged by static electricity.

[0051] When in ...

Embodiment 2

[0052] Example 2: When it is necessary to weld 40 keys 7 distributed in 8×5 on the five-slice key board, take the pin 9 of the key 7 and insert it into the center of the via hole to compress the height after welding, the length of the key board 10 and the five-screw key The width of plate, remove seat plate 1 height with the distance greater than button 7 height 1.5mm, but the length and width of seat plate 1 with respectively more than 5mm of key plate 10 lengths and five spell key plate widths. The extra 5mm side of length and width divides the two sides equally, leaving a 0.1mm installation gap for each, and then designing a limit side 3 with a width of 2.4mm and a height 0.5mm higher than the thickness of the keypad 10, to limit the placement range of the keypad 10, The key board 10 needs to print a metal edge with a width of about 2 mm on the side board and the mounting hole 5 to prevent the key board 10 from being damaged by static electricity.

[0053] When in use, firs...

Embodiment 3

[0054] Example 3: When it is necessary to weld 30 keys 7 distributed in 6×5 on the five-slice key board, take the pin 9 of the key 7 and insert it into the center of the via hole to compress the height after welding, the length of the key board 10 and the five-screw key The width of plate, go seat plate 1 height with the distance greater than button 7 height 2mm, but the length and width of seat plate 1 with the distance of 5mm more than key plate 10 length and five spell key plate width respectively. The extra 5mm side of length and width divides the two sides equally, leaving a 0.1mm installation gap for each, and then designing a limit side 3 with a width of 2.4mm and a height 0.5mm higher than the thickness of the keypad 10, to limit the placement range of the keypad 10, The key board 10 needs to print a metal edge with a width of about 2 mm on the side board and the mounting hole 5 to prevent the key board 10 from being damaged by static electricity.

[0055] When in use,...

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