CN214852069U - Tool for preventing electrostatic shielding frame solder joint opens a way - Google Patents

Abstract

The utility model discloses a jig for preventing an electrostatic shielding frame welding spot from being opened, which comprises a base plate and a first pressing plate arranged above the base plate; the base plate is provided with a positioning groove for accommodating the PCB, the first pressing plate is provided with a plurality of first avoiding holes matched with the first shielding frame in shape, the first avoiding holes are formed by surrounding a plurality of first ribs on the first pressing plate, and the lower ends of the first ribs are provided with a plurality of first elastic pressing feet for pressing the first shielding frame; the PCB board is established to the constant head tank embedded, places first shielding frame on the PCB board, and first clamp plate is placed to the top of first shielding frame to make first elasticity presser foot on the first clamp plate offset with first shielding frame, simultaneously, fixed connection is realized through the mode of fastener or joint to first clamp plate and base plate both. First elastic presser foot on this tool can flatten first shielding frame to fix it on the PCB board firmly, avoided first shielding frame because of the distortion bad or the curved phenomenon that leads to the solder joint to open a way behind the stove of board.

Description

Tool for preventing electrostatic shielding frame solder joint opens a way

Technical Field

The utility model relates to a circuit board welding technology field, more specifically say, it relates to a prevent tool that electrostatic shield frame solder joint was opened a way.

Background

The electrostatic shielding frame is used for protecting electronic components in the shielding frame from being interfered by external electromagnetic signals during normal operation. The shielding frame bending process is complex, the element body is easy to bend, the flatness of the shielding frame can not be guaranteed only by inspection and improvement, and OPEN appears after reflow soldering. Simultaneously, the more shielding frame of bending is great because of the technology degree of difficulty, and the uniformity of its roughness is relatively poor, and transports and takes the in-process and lead to the bending easily, and partial shielding frame deflection is less, and unable visual identification leads to the OPEN after the backward flow bad. When a plurality of irregular shielding frames are arranged on the same PCB, the traditional method cannot meet the reflow soldering requirement of elements or cannot ensure that all the shielding frames are uniformly stressed by depending on a heavy object and a rigid gland, and partial shielding frame pins OPEN are not good after reflow. Therefore, it is desirable to design a device capable of pressing the shielding frame onto the PCB while ensuring good flatness of the shielding frame.

SUMMERY OF THE UTILITY MODEL

The utility model provides a not enough to prior art exists, the utility model provides a prevent tool that electrostatic shield frame solder joint was opened a way, this tool can compress tightly the shielding frame on the PCB board to guarantee that the shielding frame has good plane degree, avoided the shielding frame because of the distortion bad or the crooked phenomenon that leads to the solder joint to open a way behind the stove.

In order to achieve the above purpose, the utility model provides a following technical scheme: a jig for preventing an electrostatic shielding frame welding spot from being opened comprises a substrate and a first pressing plate arranged above the substrate; the PCB board positioning device comprises a base plate, a first shielding frame, a first pressing plate, a plurality of first ribs, a plurality of first elastic pressing feet and a plurality of second elastic pressing feet, wherein the base plate is provided with a positioning groove for accommodating a PCB board, the first pressing plate is provided with a plurality of first avoiding holes matched with the first shielding frame in shape, the first avoiding holes are formed by surrounding and closing the plurality of first ribs on the first pressing plate, and the lower ends of the first ribs are provided with the plurality of first elastic pressing feet for pressing the first shielding frame;

the PCB is embedded in the positioning groove, the first shielding frame is placed on the PCB, the first pressing plate is placed above the first shielding frame, the first elastic pressing foot on the first pressing plate is abutted to the first shielding frame, meanwhile, the first pressing plate and the base plate are fixedly connected through a fastener or a clamping mode, and then the first shielding frame is pressed on the PCB.

The specific using steps are as follows: 1) placing the PCB in a positioning groove on the substrate; 2) the first shielding frame is placed on the PCB; 3) a first pressing plate is arranged above the first shielding frame, and a first elastic pressing foot on the first pressing plate is abutted against the first shielding frame; 4) meanwhile, the first pressure plate and the substrate are fixedly connected through a fastener or a clamping mode, and the first shielding frame is further pressed on the PCB; 5) the reflow soldering can be used for soldering the first shielding frame on the PCB board by penetrating the first avoiding hole.

First elastic presser foot on this tool can flatten first shielding frame to fix it on the PCB board firmly, avoided first shielding frame because of the distortion bad or the curved phenomenon that leads to the solder joint to open a way behind the stove of board. Use this tool can the visual serious and the invisible slight deformation problem in stokehold of the first shield frame of effectual solution, promoted the welding yield, the OPEN problem disappears.

Preferably, the first shielding frame is a frame structure formed by enclosing a plurality of vertical plate portions, two adjacent vertical plate portions are connected with each other to form a node, a protrusion extends from a position of the node on the first rib, and the first elastic presser foot is mounted on the protrusion.

Preferably, the first avoidance hole is further provided with a reinforcing rib, and two ends of the reinforcing rib are respectively fixedly connected with the first ribs; the reinforcing rib is provided with the first elastic presser foot.

Preferably, the first pressing plate is further provided with a plurality of second avoidance holes around the first avoidance hole.

Preferably, a plurality of first positioning posts are further fixed on the substrate, and a plurality of first positioning holes are formed in the first pressing plate corresponding to the first positioning posts.

Preferably, the substrate is further provided with at least one groove around the positioning groove, and one side of the groove is communicated with the positioning groove; the first elastic pressure foot comprises a pressure rod and a pressure block fixed at the lower end of the pressure rod, a sliding groove is formed in the first rib corresponding to the first elastic pressure foot, the upper end of the pressure rod is embedded into the sliding groove, and the upper end of the pressure rod can slide up and down in the sliding groove; still be equipped with the spring in the spout, the upper end and the first rib of spring are connected, the lower extreme and the depression bar of spring are connected.

Preferably, the substrate is provided with a plurality of first heat dissipation holes.

Preferably, a second pressing plate is further arranged below the substrate, and a plurality of third avoidance holes matched with the second shielding frame in shape are formed in the second pressing plate; the third avoidance hole is formed by encircling a plurality of second ribs on the second pressing plate, and a plurality of second elastic pressing feet for pressing the second shielding frame are mounted at the upper ends of the second ribs;

and a second PCB is placed at the lower end of the substrate, a second shielding frame is placed on the second PCB, the second pressing plate is placed at the lower end of the second shielding frame, a second elastic pressing foot on the second pressing plate is abutted to the second shielding frame, and meanwhile, the second pressing plate is fixedly connected with the substrate in a fastening or clamping manner, so that the second shielding frame is pressed on the second PCB.

Preferably, the second pressing plate is further provided with a plurality of fourth avoidance holes around the second avoidance hole.

Preferably, the substrate is further fixed with a plurality of second positioning pillars, and a plurality of second positioning holes are formed in the second pressing plate corresponding to the second positioning pillars.

To sum up, the utility model discloses following beneficial effect has:

1. the first elastic presser foot on the jig can flatten the first shielding frame and firmly fix the first shielding frame on the PCB, so that the phenomenon that welding spots are opened after a furnace due to poor distortion or plate bending of the first shielding frame is avoided; the fixture can effectively solve the problems of visible serious deformation of the first shielding frame and invisible slight deformation of the furnace front, the welding yield is improved, and the OPEN problem disappears;

2. the second pressing plate is arranged below the base plate of the jig, so that the PCB can be fixed and flattened on the upper surface and the lower surface of the base plate, the utilization rate of the jig can be improved, and the working efficiency can be improved.

Drawings

Fig. 1 is a schematic structural view of the jig with a first shielding frame pressed thereon;

FIG. 2 is a schematic view of a substrate;

FIG. 3 is a schematic structural view of a PCB and a first shielding frame mounted on a substrate;

FIG. 4 is a schematic structural view of the first platen;

FIG. 5 is an enlarged view taken at A in FIG. 1;

FIG. 6 is a bottom view of the jig;

FIG. 7 is an enlarged view at B in FIG. 6;

fig. 8 is a schematic structural view of the second presser plate.

Reference numerals: 1. a substrate; 2. a first platen; 3. a PCB board; 4. positioning a groove; 5. a first shield frame; 6. a first avoidance hole; 7. a first elastic presser foot; 8. a support leg; 9. a node; 10. a protrusion; 11. reinforcing ribs; 12. a second avoidance hole; 13. a first positioning post; 14. a first positioning hole; 15. a groove; 16. a first heat dissipation hole; 17. a pressure lever; 18. briquetting; 19. a second platen; 20. a third avoidance hole; 21. a second elastic presser foot; 22. a protruding plate portion; 23. buckling; 24. a fourth avoidance hole; 25. a second positioning column; 26. a second positioning hole; 27. a second heat dissipation hole.

Detailed Description

The present invention will be further explained with reference to the accompanying drawings.

The embodiment discloses a jig for preventing open circuit of welding spots of an electrostatic shielding frame, as shown in fig. 1 to 5, comprising a substrate 1 and a first pressing plate 2 arranged above the substrate 1; a positioning groove 4 for accommodating a PCB 3 (circuit board) is formed in the substrate 1, a plurality of second heat dissipation holes 27 are formed in the bottom of the positioning groove 4, a plurality of first avoidance holes 6 matched with the shape of the first shielding frame 5 are formed in the first pressing plate 2, the first avoidance holes 6 are formed by surrounding a plurality of first ribs on the first pressing plate 2, and a plurality of first elastic pressing feet 7 for pressing the first shielding frame 5 are mounted at the lower ends of the first ribs; the PCB board 3 is established to the embedded in constant head tank 4, and first shielding frame 5 is placed to the upper end of PCB board 3, and first clamp plate 2 is placed to the top of first shielding frame 5 to make first elasticity presser foot 7 on the first clamp plate 2 offset with first shielding frame 5, simultaneously, fixed connection is realized through the mode of fastener or joint to first clamp plate 2 and base plate 1 two, and then compresses tightly first shielding frame 5 on PCB board 3. In this embodiment, a plurality of support legs 8 extend around the first pressing plate 2, and the fastening member passes through the support legs 8 and is screwed with the substrate 1, so as to fix the first pressing plate 2 on the substrate 1.

The specific using steps are as follows: 1) placing the PCB 3 in a positioning groove 4 on the substrate 1; 2) the first shielding frame 5 is placed on the corresponding position of the PCB 3; 3) the first pressing plate 2 is placed above the first shielding frame 5, and the first elastic pressing foot 7 on the first pressing plate 2 is abutted against the first shielding frame 5; 4) meanwhile, the first pressing plate 2 and the substrate 1 are fixedly connected through a fastener or a clamping manner, and the first shielding frame 5 is further pressed on the PCB 3; 5) the first shielding frame 5 can be soldered on the PCB 3 by reflow soldering through the first avoiding hole 6.

The first elastic presser foot 7 on the jig can flatten the first shielding frame 5 and firmly fix the first shielding frame on the PCB 3, so that the phenomenon that welding spots are opened after the furnace due to poor distortion or plate bending of the first shielding frame 5 is avoided. Use this tool can effectual solution first shield frame 5 visual serious and the invisible slight deformation problem in stokehold, promoted the welding yield, the OPEN problem disappears.

In the above technical solution, the first shielding frame 5 is a frame structure formed by enclosing a plurality of longitudinal plate portions, two adjacent longitudinal plate portions are connected to each other to form a node 9, a protrusion 10 extends from a position of the node 9 on the first rib, and the first elastic presser foot 7 is mounted on the protrusion 10. The node 9 of the first shielding frame 5 is easy to deform, and the first elastic presser foot 7 is arranged at the position where the first shielding frame 5 is easy to deform, so that all deformation positions of the first shielding frame 5 can be uniformly stressed. Meanwhile, the first avoidance hole 6 is also provided with a reinforcing rib 11, and two ends of the reinforcing rib 11 are respectively fixedly connected with the first ribs; the reinforcing rib 11 is provided with a first elastic presser foot 7. So, on the one hand, can increase the bulk strength of first clamp plate 2, on the other hand, increased first shielding frame 5's atress position, make first shielding frame 5 more level and smooth. In addition, a plurality of second avoidance holes 12 are further formed on the first pressing plate 2 around the first avoidance hole 6. The first shield frame 5 is easily soldered.

Preferably, a plurality of first positioning posts 13 are further fixed to the base plate 1, and a plurality of first positioning holes 14 are formed in the first presser plate 2 at positions corresponding to the first positioning posts 13. Thus, the assembly of the substrate 1 and the first pressing plate 2 is facilitated. At least one groove 15 is further formed in the position, surrounding the positioning groove 4, of the substrate 1, and one side of the groove 15 is communicated with the positioning groove 4; the arrangement of the groove 15 is convenient for taking and placing the PCB 3. In this embodiment, preferably, the substrate 1 is provided with two grooves 15, and the two grooves 15 are disposed on two opposite sides of the positioning slot 4. Meanwhile, the substrate 1 is further provided with a plurality of first heat dissipation holes 16. Thus, heat dissipation can be increased. As an embodiment, the first elastic presser foot 7 comprises a pressing rod 17 and a pressing block 18 fixed at the lower end of the pressing rod 17, a sliding groove is formed on the first rib corresponding to the position of the first elastic presser foot 7, the upper end of the pressing rod 17 is embedded into the sliding groove, and the upper end of the pressing rod 17 can slide up and down in the sliding groove; still be equipped with the spring in the spout, the upper end and the first rib of spring are connected, and the lower extreme and the depression bar 17 of spring are connected. When the first elastic presser foot 7 abuts against the first shielding frame 5, the first elastic presser foot 7 moves upward and compresses the spring under the reaction force of the first shielding frame 5, and accordingly, the spring gives the first elastic presser foot 7 a downward movement tendency and presses the first elastic shielding frame.

Preferably, a second pressing plate 19 is further arranged below the substrate 1, and a plurality of third avoiding holes 20 matched with the shape of the second shielding frame are formed in the second pressing plate 19; it should be noted that the shape of the second shielding frame may be the same as or different from that of the first shielding frame 5, and meanwhile, the second pressing plate 19 may also be provided with a positioning groove 4 structure for positioning the PCB 3; the third avoidance hole 20 is formed by enclosing a plurality of second ribs on the second pressing plate 19, and a plurality of second elastic pressing feet 21 for pressing the second shielding frame are mounted at the upper ends of the second ribs; the second PCB board 3 is placed to the lower extreme of base plate 1, and the second shielding frame is placed on second PCB board 3, and second clamp plate 19 is placed to the lower extreme of second shielding frame to make second elasticity presser foot 21 on the second clamp plate 19 offset with the second shielding frame, simultaneously, second clamp plate 19 passes through the mode of fastener or joint and base plate 1 fixed connection, and then compresses tightly the second shielding frame on second PCB board 3. In this embodiment, the two opposite ends of the second pressing plate 19 extend to form extending plate portions 22, the extending plate portions 22 extend to the substrate 1 to form buckles 23, and the second pressing plate 19 is clamped on the substrate 1 in a clamping manner. Therefore, the PCB 3 can be fixed and the shielding frame can be flattened on the upper surface and the lower surface of the substrate 1, and the utilization rate of the jig can be improved and the working efficiency can be improved. Meanwhile, a plurality of fourth avoidance holes 24 are further formed on the second pressing plate 19 around the third avoidance holes 20. Furthermore, a plurality of second positioning posts 25 are fixed on the substrate 1, and a plurality of second positioning holes 26 are formed on the second pressing plate 19 corresponding to the second positioning posts 25. Thus, the assembly of the substrate 1 and the second presser plate 19 is facilitated. As an embodiment, the specific structure of the second elastic presser foot 21 can refer to the structure of the first elastic presser foot 7.

In the present invention, it should be understood that the terms "upper" and "lower" indicate the orientation or the position relationship based on the orientation or the position relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, and therefore, the present invention is not limited thereto.

The directions given in the present embodiment are merely for convenience of describing positional relationships between the respective members and the relationship of fitting with each other. It is above only the utility model discloses a preferred embodiment, the utility model discloses a scope of protection does not only confine above-mentioned embodiment, the all belongs to the utility model discloses a technical scheme under the thinking all belongs to the utility model discloses a scope of protection. It should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.

Claims (10)

1. The utility model provides a prevent tool that electrostatic shield frame solder joint was opened a way, characterized by: comprises a substrate (1) and a first pressing plate (2) arranged above the substrate (1); the PCB shielding device is characterized in that a positioning groove (4) used for accommodating a PCB (3) is formed in the substrate (1), a plurality of first avoiding holes (6) matched with the first shielding frame (5) in shape are formed in the first pressing plate (2), the first avoiding holes (6) are formed by surrounding a plurality of first ribs on the first pressing plate (2), and a plurality of first elastic pressing feet (7) used for pressing the first shielding frame (5) are mounted at the lower ends of the first ribs;

the PCB is embedded in the positioning groove (4), the first shielding frame (5) is placed on the PCB (3), the first pressing plate (2) is placed above the first shielding frame (5), the first elastic pressing foot (7) on the first pressing plate (2) is abutted to the first shielding frame (5), meanwhile, the first pressing plate (2) and the base plate (1) are fixedly connected through a fastener or a clamping connection mode, and the first shielding frame (5) is pressed on the PCB (3).

2. The jig for preventing the open circuit of the welding spot of the electrostatic shielding frame according to claim 1, wherein: the first shielding frame (5) is a frame structure formed by enclosing a plurality of longitudinal plate parts, two adjacent longitudinal plate parts are connected with each other to form a node (9), a protrusion (10) extends from the position, located on the node (9), of the first rib, and the first elastic pressing foot (7) is installed on the protrusion (10).

3. The jig for preventing the open circuit of the welding spot of the electrostatic shielding frame according to claim 1 or 2, wherein: the first avoidance hole (6) is also provided with a reinforcing rib (11), and two ends of the reinforcing rib (11) are respectively fixedly connected with the first ribs; the reinforcing rib (11) is provided with the first elastic presser foot (7).

4. The jig for preventing the open circuit of the welding spot of the electrostatic shielding frame according to claim 1, wherein: and a plurality of second avoidance holes (12) are further formed on the first pressing plate (2) around the first avoidance holes (6).

5. The jig for preventing the open circuit of the welding spot of the electrostatic shielding frame according to claim 1, wherein: the base plate (1) is further fixed with a plurality of first positioning columns (13), and a plurality of first positioning holes (14) are formed in the positions, corresponding to the first positioning columns (13), of the first pressing plate (2).

6. The jig for preventing the open circuit of the welding spot of the electrostatic shielding frame according to claim 1, wherein: the base plate (1) is also provided with at least one groove (15) around the positioning groove (4), and one side of the groove (15) is communicated with the positioning groove (4); the first elastic presser foot (7) comprises a pressing rod (17) and a pressing block (18) fixed at the lower end of the pressing rod (17), a sliding groove is formed in the position, corresponding to the first elastic presser foot (7), of the first rib, the upper end of the pressing rod (17) is embedded into the sliding groove, and the upper end of the pressing rod (17) can slide up and down in the sliding groove; still be equipped with the spring in the spout, the upper end and the first rib of spring are connected, the lower extreme and the depression bar (17) of spring are connected.

7. The jig for preventing the open circuit of the welding spot of the electrostatic shielding frame according to claim 1, wherein: the base plate (1) is provided with a plurality of heat dissipation holes (16).

8. The jig for preventing the open circuit of the solder joint of the electrostatic shielding frame according to claim 4, wherein: a second pressing plate (19) is further arranged below the substrate (1), and a plurality of third avoiding holes (20) matched with the second shielding frame in shape are formed in the second pressing plate (19); the third avoidance hole (20) is formed by encircling a plurality of second ribs on the second pressing plate (19), and a plurality of second elastic pressing feet (21) used for pressing the second shielding frame are mounted at the upper ends of the second ribs;

the PCB structure is characterized in that a second PCB (3) is placed at the lower end of the base plate (1), a second shielding frame is placed on the second PCB (3), a second pressing plate (19) is placed at the lower end of the second shielding frame, a second elastic pressing foot (21) on the second pressing plate (19) is abutted to the second shielding frame, meanwhile, the second pressing plate (19) is fixedly connected with the base plate (1) through a fastener or a clamping mode, and the second shielding frame is tightly pressed on the second PCB (3).

9. The jig for preventing the open circuit of the solder joint of the electrostatic shielding frame according to claim 8, wherein: and a plurality of fourth avoidance holes (24) are further formed on the second pressing plate (19) around the second avoidance holes (12).

10. The jig for preventing the open circuit of the solder joint of the electrostatic shielding frame according to claim 8, wherein: a plurality of second positioning columns (25) are further fixed on the substrate (1), and a plurality of second positioning holes (26) are formed in the second pressing plate (19) corresponding to the second positioning columns (25).

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