Spring gland jig for improving deformation of shielding frame or shielding cover

Abstract

The utility model discloses a spring gland jig for improving the deformation of a shielding frame or a shielding cover, which comprises a tray and a gland, the tray comprises a tray body, the central position of the tray body is provided with a storage groove, the storage groove is internally provided with a plurality of first air holes, a PCB (Printed Circuit Board) is placed in the storage groove, and a plurality of gland connecting pieces are arranged outside the storage groove; the gland comprises a plate-shaped gland body, a plurality of second air holes are formed in the center of the gland body, and vertically downward spring pins are arranged outside the edges of the second air holes; the gland body is detachably connected with the gland connecting pieces, and the bottom ends of the spring pins are connected to the four corners of a shielding frame or a shielding cover on the PCB in the containing groove in a pressed mode. The pressing cover connecting piece additionally arranged on the tray is detachably connected with the pressing cover, the bottom ends of the spring pins are tightly connected to the PCB in a pressed mode, the spring pins pressurize the four corners of the shielding frame or the shielding cover, deformation can be corrected, the frame is made to be flatly attached to a bonding pad, false welding floating is avoided in the welding process, and the shielding frame or the shielding cover does not deform in the transportation process.

Description

Technical Field

[0001] The utility model relates to the technical field of PCB production equipment, in particular to a spring cover fixture for improving the deformation of a shielding frame or a shielding cover. Background Art

[0002] The SMT process, fully known as Surface Mount Technology, is a commonly used process in electronic product manufacturing. It directly solders components on the surface of a printed circuit board (PCB) to achieve rapid component mounting and improve the capacity effect. During the chip manufacturing process, the shielding frame and the shielding cover, as key components, their processing accuracy and the stability of packaging and transportation are crucial to the quality of the final product.

[0003] Differences in material processing capabilities and improper handling during packaging and transportation often lead to deformation, non-coplanarity, etc. of the shielding frame or the shielding cover. During soldering, problems such as false soldering and floating height defects are likely to occur. The false soldering phenomenon is mainly due to the excessive flatness of the shielding cover, and the solder paste fails to be fully infiltrated, resulting in insecure soldering; while the floating height defect may be due to the uneven contact surface caused by deformation, resulting in a gap between the soldered shielding cover and the PCB board. This not only affects the electrical performance and reliability of the product but also increases the cost of subsequent maintenance and rework. Summary of the Utility Model

[0004] In order to overcome the deficiencies that the shielding frame or the shielding cover is prone to deformation and non-coplanarity during production or transportation in the existing technology, the utility model provides a spring cover fixture for improving the deformation of the shielding frame or the shielding cover.

[0005] The technical solution of the utility model is as follows:

[0006] A spring cover fixture for improving the deformation of a shielding frame or a shielding cover, comprising:

[0007] A tray, the tray includes a tray body, a placement groove is provided at the center position of the tray body, a plurality of first ventilation holes are provided in the placement groove, a PCB board is placed in the placement groove, and a plurality of cover connecting parts are provided outside the placement groove;

[0008] A cover, the cover includes a cover body, the cover body is plate-shaped, a plurality of second ventilation holes are provided at the center position of the cover body corresponding to the first ventilation holes, and spring pins are provided vertically downward outside the second ventilation holes;

[0009] The cover body and the cover connecting parts are respectively detachably connected, and the bottom ends of the spring pins are pressed against the four corner positions of the shielding cover on the PCB board in the placement groove to prevent the shielding frame or the shielding cover on the PCB board from warping.

[0010] Further, in one embodiment, the spring pin includes a guide sleeve, a spring, a pressure pin, and a fixing screw. A limiting hole is provided outside the included angle position of the second ventilation hole. The guide sleeve is fitted in the limiting hole. The spring is sleeved on the fixing screw. One end of the fixing screw sleeving the spring passes through the guide sleeve and is connected to the pressure pin.

[0011] Further, in one embodiment, the gland connecting member includes a gland height support column, and a gland buckle body fixed on the gland height support column and protruding outward from the gland height support column. The gland buckle body can rotate around the central axis of the gland height support column. The lower end of the gland buckle body is pressed against the gland body.

[0012] Further, in one embodiment, the gland height support column includes a fixed threaded column, a fixed gland buckle screw, and a gland buckle column body. The fixed threaded column is fixed on the tray body. The gland buckle column body, the gland buckle body, and the fixed gland buckle screw are sequentially penetrated through the fixed threaded column. The gland buckle body is pressed against the gland buckle column body. The fixed gland buckle screw is fixed above the gland buckle body.

[0013] Further, in one embodiment, there are multiple gland buckle column bodies. The multiple gland buckle column bodies are stacked up and down to control the height below the gland buckle body.

[0014] Further, in one embodiment, multiple high pins are provided on the tray. Corresponding multiple positioning holes are provided on the gland body. When the gland body is sleeved, the top ends of the high pins are inserted into the positioning holes.

[0015] Further, in one embodiment, there are four high pins, which are respectively fixed in pairs at opposite ends of the tray, and the high pins at both ends are asymmetrically arranged.

[0016] Further, in one embodiment, on the tray body, pick-up slots are further provided at both ends of the storage slot, and the two pick-up slots are symmetrically arranged.

[0017] Further, in one embodiment, corresponding to the positions of the two pick-up slots, a third ventilation hole is provided on the gland body.

[0018] Further, in one embodiment, photosensitive paint is applied to the two track sides at the bottom of the tray body.

[0019] For the utility model according to the above solution, its beneficial effect is that the gland connecting member added on the tray is detachably connected to the gland. The bottom end of the spring pin is tightly pressed against the PCB board. The spring pin pressurizes the four corners of the shielding frame or shielding cover, which can correct deformation, make the frame flat against the pad, there is no false soldering or floating height during welding, and the shielding frame or shielding cover does not deform during transportation. Brief Description of the Drawings

[0020] To more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0021] Figure 1 is a schematic structural diagram of the present invention;

[0022] Figure 2 is a top view of the tray;

[0023] Figure 3 is a top view of the gland body

[0024] In the figure, 100, tray; 110, tray body; 1101, storage groove; 1102, first ventilation hole; 1103, access groove; 120, gland connecting piece; 1201, fixed threaded column; 1202, buckle body; 1203, buckle column; 1204, fixed buckle screw; 130, high pin; 200, gland; 210, gland body; 2101, second ventilation hole; 220, spring pin; 2201, fixing screw; 2202, guide sleeve; 2203, spring; 2204, press pin; 230, limit hole; 240, access groove; 250, positioning hole;

[0025] 1, PCB board. Detailed Embodiments

[0026] The following further describes the present invention in conjunction with the drawings and embodiments. It should be noted that when an element is expressed as "fixed to" another element, it can be directly on the other element, or there can be one or more intermediate elements therebetween. When an element is expressed as "connected to" another element, it can be directly connected to the other element, or there can be one or more intermediate elements therebetween. The terms "vertical", "horizontal", "left", "right", "inner", "outer" and similar expressions used in this specification are only for the purpose of illustration. In the description of the present invention, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating relative importance or implicitly indicating the quantity of the indicated technical features. Thus, unless otherwise stated, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features; the meaning of "a plurality" is two or more. The term "comprising" and any deformation thereof means non-exclusive inclusion, and there may be one or more other features, integers, steps, operations, units, components and / or combinations thereof present or added.

[0027] In addition, unless otherwise clearly defined and limited, the terms "mounted", "connected" and "coupled" shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be a direct connection or an indirect connection through an intermediate medium, or the internal communication of two components. All technical and scientific terms used in this specification have the same meaning as those commonly understood by those skilled in the technical field to which the present utility model belongs. The terms used in the specification of the present utility model are only for the purpose of describing specific embodiments and are not used to limit the present utility model. The term "and / or" used in this specification includes any and all combinations of one or more of the related listed items.

[0028] In addition, the technical features involved in different embodiments of the present utility model described below can be combined with each other as long as they do not conflict with each other.

[0029] As Figures 1 - 3 shown, the present application provides an embodiment of a spring pressing cover fixture for improving the deformation of a shielding frame or a shielding cover. The spring pressing cover fixture for improving the deformation of a shielding frame or a shielding cover includes a tray 100 and a pressing cover 200. The tray 100 includes a tray 100 body. A placing groove 1101 is provided at the central position of the tray 100 body. A plurality of first ventilation holes 1102 are provided in the placing groove 1101. A PCB board 1 is placed in the placing groove 1101. A plurality of pressing cover connectors 120 are provided outside the placing groove 1101. The pressing cover 200 includes a pressing cover body 210. The pressing cover body 210 is in a plate shape. A plurality of second ventilation holes 2101 are provided at the central position of the pressing cover body 210 corresponding to the plurality of first ventilation holes 1102. Vertically downward spring pins 220 are provided outside the edges of the second ventilation holes 2101. The pressing cover body 210 is detachably connected to the pressing cover connectors 120 respectively. The bottom ends of the spring pins 220 are pressed against the four corner positions of the shielding frame or the shielding cover on the PCB board 1 in the placing groove 1101 to prevent the shielding frame or the shielding cover on the PCB board 1 from warping. In the present utility model, by adding the pressing cover connectors 120 on the tray 100 to limit the height of the pressing cover body 210, when the PCB board 1 is placed in the placing groove 1101 on the tray 100 body and the pressing cover 200 is covered, the pressing cover connectors 120 limit the height of the pressing cover 200, and the spring pins 220 apply pressure to the four corners of the shielding frame or the shielding cover. The four corners of the shielding frame or the shielding cover are subjected to the downward pressure of the spring pins 220, and the warped and deformed body is reshaped, and the frame is flat against the pad, and there is no false soldering or floating height during welding. Similarly, during transportation, it can also ensure that the shielding frame or the shielding cover does not deform.

[0030] In this embodiment, the first vent hole 1102 and the second vent hole 2101 are milled empty windows to facilitate the convection of hot air during reflow soldering, so that the PCB board 1 is heated evenly. The placement groove 1101 is a downwardly concave groove, and generally the groove depth is slightly smaller than the thickness of the PCB board 1 to keep the PCB board 1 flat on the surface of the tray 100 body. The middle first vent hole 1102 provides support for each small single board of the PCB board 1 and avoids holes for the fixing feet of the shielding frame, facilitating heat absorption of the PCB board 1 during reflow.

[0031] SMT soldering generally uses the reflow soldering process. A pressure cover 200 is added to the reflow soldering tooling for the mounted shielding frame and shielding cover. The spring pin 220 ensures that the border of each shielding frame or shielding cover is attached to the PCB pad after mounting, preventing problems such as false soldering and floating height during reflow soldering in the furnace.

[0032] As Figure 1 and Figure 3 shown, in one embodiment, the spring pin 220 includes a guide sleeve 2202, a spring 2203, a pressure pin 2204, and a fixing screw 2201. A limit hole 230 is provided outside the included angle position of the second vent hole 2101. The guide sleeve 2202 is fitted in the limit hole 230. The spring 2203 is sleeved on the fixing screw 2201. One end of the fixing screw 2201 sleeved with the spring 2203 passes through the guide sleeve 2202 and is connected to the pressure pin 2204. The spring 2203 gives an upward elastic force to the fixing screw 2201 and a downward elastic force to the pressure pin 2204, balancing and stabilizing the force on the entire PCB board 1. The guide sleeve 2202 guides the fixing screw 2201 to keep it vertically up and down, guiding the downward extrusion of the spring pin 220 on the shielding cover or shielding frame to prevent the spring pin 220 from generating downward displacement. When the pressure cover 200 is pressed down, the pressure pin 2204 can effectively press the four corners of the shielding frame or shielding cover under the action of the spring 2203, so that the warping deformation of the shielding frame or shielding cover on the PCB board 1 is corrected. And in this embodiment, the spring pin 220 presses down accurately and the structure of the pressure cover 200 is simple.

[0033] As Figure 1 and Figure 2As shown in one embodiment, the gland connection member 120 includes a gland height pillar, and a buckle body 1202 fixed to the gland height pillar and protruding outward from the gland height pillar. The buckle body 1202 can rotate around the central axis of the gland height pillar, and the lower end of the buckle body 1202 is pressed against the gland body 210. The buckle body 1202 is a water-drop-shaped plate body. When the gland 200 is assembled onto the tray 100, the buckle body 1202 is rotated so that its protruding part extends above the gland body 210. The gland height pillar controls the downward pressing height of the gland 200. With the cooperation of the spring pin 220 and the buckle body 1202, the gland 200 is fixed. Multiple spring pins 220 form a stable downward pressure on the shielding frame or shielding cover on the PCB board 1 in the lower storage slot 1101, correcting the deformation of the shielding frame or shielding cover and keeping it flat.

[0034] As Figure 1 shown, in one embodiment, the gland height pillar includes a fixed threaded post 1201, a fixed buckle screw 1204, and a buckle cylinder 1203. The fixed threaded post 1201 is fixed to the tray 100 body. The buckle cylinder 1203, the buckle body 1202, and the fixed buckle screw 1204 are sequentially penetrated through the fixed threaded post 1201. The buckle body 1202 is pressed against the buckle cylinder 1203, and the fixed buckle screw 1204 is fixed above the buckle body 1202. The buckle cylinder 1203 is a cylinder with a through hole in the center. Multiple buckle cylinders 1203 are stacked up and down to control the height below the buckle body 1202. The fixed buckle screw 1204 locks the buckle body 1202 to the gland body 210, so that the gland 200 cannot move arbitrarily, so that the buckle body 1202 will not bounce up after pressing down the gland 200, and the pressing pin 2204 remains effective.

[0035] In this embodiment, there are three buckle cylinders 1203, and the heights of the two lower ones are the same, and the height of the uppermost buckle cylinder 1203 is smaller. Different combinations of buckle cylinders 1203 are used to control the height below the buckle body 1202.

[0036] As Figure 2 and Figure 3 shown, in one embodiment, the tray 100 is provided with a plurality of high pins 130, and the gland body 210 is correspondingly provided with a plurality of positioning holes 250. When the gland body 210 is sleeved, the top of the high pin 130 is inserted into the positioning hole 250. In this embodiment, there are four high pins 130, which are respectively fixed in pairs at opposite ends of the tray 100, and the high pins 130 at both ends are asymmetrically arranged. The vertical high pins 130 and the positioning holes 250 cooperate with each other to play a guiding role and facilitate the quick positioning of the spring pin 220. The asymmetric design of the high pins 130 at both ends can position the gland 200 when it is sleeved and prevent the gland 200 from being placed upside down.

[0037] As Figure 1 and Figure 2 shown, in one embodiment, on the body of the tray 100, at both ends of the object placing groove 1101, there are also provided object taking grooves 240, and the two object taking grooves 240 are symmetrically arranged. Generally, the groove depth of the object taking groove 240 is greater than that of the object placing groove 1101, which is convenient for grasping the edge of the board after welding to perform the board taking operation.

[0038] As Figure 3 shown, in one embodiment, corresponding to the positions of the two object taking grooves 240, a third ventilation hole is provided on the cover body 210. The third ventilation hole is an empty window, which is beneficial to the convection of hot air during reflow soldering, so that the PCB board 1 is heated evenly.

[0039] In one embodiment, photosensitive paint is applied to the two track edges at the bottom of the tray 100 body. The photosensitive paint facilitates the fixture to be sensed by the processing equipment, which is convenient for automated production and detection. It should be understood that for those of ordinary skill in the art, improvements or transformations can be made according to the above description, and all such improvements and transformations should fall within the protection scope of the appended claims of the present utility model.

[0040] The above has described the patent of the present utility model in an exemplary manner with reference to the accompanying drawings. Obviously, the implementation of the patent of the present utility model is not limited by the above methods. As long as various improvements are made by adopting the method concept and technical solution of the patent of the present utility model, or the concept and technical solution of the patent of the present utility model are directly applied to other occasions without improvement, they are all within the protection scope of the present utility model.

Claims

1. A spring gland fixture for improving the deformation of a shielding frame or shielding cover, characterized in that including a tray, the tray includes a tray body, a placing groove is provided at the center position of the tray body, a plurality of first ventilation holes are provided in the placing groove, a PCB board is placed in the placing groove, and a plurality of gland connecting pieces are provided outside the placing groove; a gland, the gland includes a gland body, the gland body is plate-shaped, a plurality of second ventilation holes are provided at the center position of the gland body corresponding to the first ventilation holes, and spring pins vertically downward are provided outside the second ventilation holes; the gland body and the gland connecting pieces are respectively detachably connected, and the bottom ends of the spring pins are pressed against the four corners of the shielding cover on the PCB board in the placing groove to prevent the shielding frame or shielding cover on the PCB board from warping.

2. The spring gland fixture for improving the deformation of the shielding frame or shielding cover according to claim 1, wherein The spring pin includes a guide sleeve, a spring, a press pin and a fixing screw. A limiting hole is provided outside the included angle position of the second ventilation hole. The guide sleeve is embedded in the limiting hole. The spring is sleeved on the fixing screw. One end of the fixing screw sleeving the spring passes through the guide sleeve and is connected to the press pin.

3. The spring gland fixture for improving the deformation of the shielding frame or shielding cover according to claim 2, wherein, The gland connecting piece includes a gland height support column, and a buckle body fixed on the gland height support column and protruding outward from the gland height support column. The buckle body can rotate around the central axis of the gland height support column, and the lower end of the buckle body is pressed against the gland body.

4. The spring pressing cover fixture for improving the deformation of the shielding frame or shielding cover according to claim 3, characterized in that, The gland height support column includes a fixed threaded column, a fixed buckle screw and a buckle column body. The fixed threaded column is fixed on the tray body. The buckle column body, the buckle body and the fixed buckle screw are sequentially penetrated on the fixed threaded column. The buckle body is pressed against the buckle column body, and the fixed buckle screw is fixed above the buckle body.

5. The spring pressing cover jig for improving the deformation of the shielding frame or shielding cover according to claim 4, characterized in that, There are a plurality of the buckle column bodies, and the plurality of buckle column bodies are stacked up and down to control the height below the buckle body.

6. The spring pressing cover jig for improving the deformation of the shielding frame or shielding cover according to claim 1, wherein, A plurality of high pins are provided on the tray, and a plurality of positioning holes are correspondingly provided on the gland body. When the gland body is sleeved, the top ends of the high pins are inserted into the positioning holes.

7. The spring gland jig for improving the deformation of the shielding frame or shielding cover according to claim 6, characterized in that There are four high pins, which are respectively fixed in pairs at the opposite ends of the tray, and the high pins at both ends are asymmetrically arranged.

8. The spring gland jig for improving the deformation of the shielding frame or shielding cover according to claim 1, wherein On the tray body, pick-up grooves are further provided at both ends of the placing groove, and the two pick-up grooves are symmetrically arranged.

9. The spring pressing cover fixture for improving the deformation of the shielding frame or shielding cover according to claim 8, wherein Corresponding to the positions of the two pick-up grooves, third ventilation holes are provided on the gland body.

10. The spring pressing cover jig for improving the deformation of the shielding frame or shielding cover according to claim 1, characterized in that, Photosensitive paint is applied to the two track sides at the bottom of the tray body.

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