CN214256778U - Electronic component equipment structure of preventing skew - Google Patents

Abstract

The utility model discloses an anti-skew structure for assembling electronic elements, which comprises an insert body, a wide bolt and a narrow bolt; the plug-in body is a cuboid, and the size of the plug-in body is changed according to the size of the mounting element; the wide bolts and the narrow bolts are positioned at the lower end of the plug-in body, the size of the wide bolts and the narrow bolts is changed along with the plug-in body, a space exists between every two adjacent bolts, and the sum of the lengths of all the bolts and the space is not more than the length of the bottom edge of the plug-in body. The utility model has the advantages that the anti-skew structure can limit the position of the electronic element and prevent the element from skewing in the welding process; the combination of the wide and narrow bolts can bear different types and directions of stress, so that the structural stability is ensured; chamfers with different sizes on the top of the structure can assist in determining the front and back sides of the structure, and the installation time is saved; the structure can be recycled, so that processing materials are saved; for some important elements, the structure can be installed on a PCB for a long time, and can play a role in strengthening and assisting heat dissipation at the same time.

Description

Electronic component equipment structure of preventing skew

Technical Field

The utility model relates to a mounting structure on the PCB board, especially a crooked structure is prevented in electronic component equipment.

Background

The printed circuit board is a PCB board, and the PCB board with components is called a circuit board assembly, i.e., a PCBA. The wave soldering process is that PCBA with inserted plug-in components is loaded on a jig and passes through a soldering flux spraying system of a tin furnace (wave soldering machine), a preheating section and a tin bath in sequence through a conveyor belt. The circuit board is contacted with the molten tin in the tin bath to complete welding, and then the process is completed through a cooling system.

In the wave soldering process, the flowing direction of the tin liquid is opposite to the moving direction of the PCBA, and eddy current is formed around the pin of the component. Although the process can remove the soldering flux and the oxide film, the pin displacement can be caused, so that the electronic element is inclined, the phenomenon of insufficient soldering or interference of a rear-section product module is caused, and the soldering quality is finally reduced.

In order to fix the electronic component on the PCB, structural improvement of the existing PCB is required. For example, a chinese patent document discloses an "electronic component substrate and a fixing member thereof for mounting an electronic component on a PCB" with a publication number CN103635061A, which includes a body and at least one first connecting portion. Be provided with a plurality of first pin holes on the body of mounting, and be provided with the first connecting portion of being connected with PCB board buckle, can set up electronic component on the mounting earlier, then will be provided with electronic component's mounting and fix on the PCB board to can make electronic component fixed firm, avoid electronic component installation defect.

In the design, the fixing pieces are used as an intermediate connecting link between the electronic element and the PCB, although the firmness of the element can be enhanced, each fixing piece needs to be independently arranged, the installation time is greatly prolonged, and the process is more complicated; the welding point exists on the fixing piece, the connection firmness of the electronic element and the fixing piece is not necessarily stronger than that of welding, and the situation that the fixing piece is firm and the electronic element is loose can occur; each time the fastener is welded, the fastener is fixed with the component, which results in a large amount of additional fastener consumption, increasing material consumption and processing costs.

SUMMERY OF THE UTILITY MODEL

The utility model relates to an overcome the convenience and the reliability scheduling problem that prior art exists, provide a structure simple relatively, can prevent that electronic component's pin from removing in welding process, and crooked structure is prevented in the electronic component equipment that can reuse.

In order to solve the problem, the utility model adopts the following technical scheme:

an anti-skew structure for assembling electronic elements comprises a plug-in body, a wide bolt and a narrow bolt; the plug-in body is a cuboid, the size of the plug-in body is not fixed, and the corresponding size is selected according to different sizes of the mounting elements; the wide bolts and the narrow bolts are positioned at the lower end of the plug-in body, the sizes of the wide bolts and the narrow bolts are changed along with the size change of the plug-in body, a space exists between every two adjacent wide bolts and narrow bolts, and the sum of the lengths of all the bolts and the space is not greater than the length of the bottom edge of the plug-in body.

Preferably, chamfers with different sizes are respectively arranged on two sides of the top end of the plug-in body; the existence of the chamfer can assist the front and back judgment of the structure, and is favorable for accelerating the installation speed of the structure.

Preferably, the angles of the chamfers are 40-50 degrees, the chamfer angle on one side is not more than 1mm, and the chamfer angle on the other side is not less than 1.5 mm; the chamfers on both sides need to be quickly and clearly distinguishable by naked eyes and are convenient to process, so that the time of the whole technological process is saved.

Preferably, the distance is not greater than the length of the wide plug pin and not less than the length of the narrow plug pin; the excessively long space is not favorable for the stability of the structure, and the excessively short space increases the processing difficulty of the structure, so that the space length needs to be reasonably controlled.

Preferably, at least one wide bolt and at least one narrow bolt are arranged, and the arrangement sequence of the wide bolts and the narrow bolts is not fixed; the wide bolt side is more important than bending resistance, and the narrow bolt side is more important than stretching resistance and compression resistance, and the number and the position of the bolts are reasonably arranged according to the possible stress and the moving direction of the electronic element.

Preferably, the heights and thicknesses of the wide bolt and the narrow bolt are the same, the lengths and thicknesses of the two bolts are slightly larger than the length and width of the corresponding slot on the PCB, and the heights of the bolts are matched with the thickness of the PCB.

Preferably, the plug-in body, the wide bolt and the narrow bolt are made of the same nonmetal material with certain elasticity; the surface of the plug-in body is covered with a heat-conducting coating; because what two kinds of bolts were used is elastic material, the slot is closely laminated in the compressed while to the material when inserting the PCB board to make the structure more firm, nonmetal ensures that the structure can not welded on the PCB board, and the heat conduction coating can make this structure auxiliary component heat conduction.

Therefore, the utility model discloses following beneficial effect has: (1) the anti-skew structure can effectively limit the position of the electronic component, thereby preventing the electronic component from being skewed in the welding process. (2) The mode of combining the wide and narrow bolts is adopted, so that the stress in different types and directions can be borne, and the stability of the structure is ensured. (3) The chamfers with different sizes are arranged on the top of the structure, so that the front side and the back side of the structure can be determined more quickly under the condition that the slots are too dense, and the installation time is saved. (4) After welding, the structure can be recycled, and processing materials are saved. (5) For some important elements, the structure can be installed on a PCB for a long time, and can play a role in reinforcing and assisting the heat dissipation of the elements at the same time.

Drawings

Fig. 1 is a three-dimensional schematic view of the present invention;

fig. 2 is a front view of the present invention in one embodiment thereof.

In the figure: 1-plug-in unit body, 2-wide plug pin and 3-narrow plug pin.

Detailed Description

The following provides a further description of embodiments of the present invention with reference to the accompanying drawings.

As shown in fig. 1 and fig. 2, the electronic component assembly anti-skew structure of the present invention includes a plug-in body 1, a wide plug 2, and a narrow plug 3; the plug-in body 1 is a cuboid, the size of the plug-in body is not fixed, and the corresponding size is selected according to different sizes of mounting elements; the wide bolts 2 and the narrow bolts 3 are positioned at the lower end of the plug-in body 1, the size of the wide bolts and the narrow bolts changes along with the size change of the plug-in body 1, a space exists between every two adjacent wide bolts and narrow bolts 2 and 3, and the sum of the lengths of all the bolts and the space is not more than the length of the bottom edge of the plug-in body 1.

Specifically, chamfers with different sizes are respectively arranged on two sides of the top end of the plug-in body 1.

Specifically, the angles of the chamfers are 40-50 degrees, the chamfer angle on one side is not more than 1mm, and the chamfer angle on the other side is not less than 1.5 mm.

Specifically, the interval is not more than the length of the wide plug 2 and not less than the length of the narrow plug 3.

Specifically, at least one of the wide plug pins 2 and the narrow plug pins 3 is arranged, and the arrangement sequence of the wide plug pins 2 and the narrow plug pins 3 is not fixed.

Specifically, the height and thickness of the wide bolt 2 and the narrow bolt 3 are the same, the length and thickness of the bolts of the two bolts are slightly larger than the length and width of the corresponding slot on the PCB, and the height of the bolts is matched with the thickness of the PCB.

Specifically, the plug-in body 1, the wide plug pin 2 and the narrow plug pin 3 are made of the same nonmetal material with certain elasticity; the surface of the plug-in body is covered with a heat-conducting coating.

The utility model discloses the working process:

one embodiment of the present invention is shown in fig. 2. When the electronic component fixing device is used, slots which are arranged in a certain sequence are designed and arranged on a PCB in advance aiming at electronic components needing to be fixed. Wherein electronic components having a certain kind of same structural features are limited by the same anti-skew structure (hereinafter referred to as "structure") (e.g., a structure having a specific size and a wide-narrow pin arrangement order in this example). The PCB board does not limit the material, shape and thickness. After the PCB board is manufactured, the package body 1 is clamped using tweezers or other jigs according to a predetermined electronic component arrangement scheme. According to the chamfer of 1 top of plug-in components not of uniform size, confirm the positive and negative of structure fast, insert the corresponding draw-in groove of PCB board with wide bolt 2 and narrow bolt 3, later repeated above-mentioned action. The mounting of the electronic component can be performed after the positioning effect is generated by the structure. Since one electronic component needs to be limited by one or more structures, the electronic component with multiple structure limitation should be installed in advance under the condition of ensuring the positioning effect. After all structures and components are installed, a typical wave soldering process may be performed.

And after the wave soldering process is finished, taking down most of structures on the PCB. When taking out, the plug-in body 1 is clamped by using tweezers or other clamps, the whole structure is deviated to one side (outer side) far away from the element and is forced upwards, and the wide plug pin 2 and the narrow plug pin 3 are pulled out. Because structure and component are only dabbed, do not have and connect or extrude, and the bolt all has certain elasticity wide and narrow, with the structure outside skew can not disturb electronic component completely. For some key elements needing enhanced stability or having heat dissipation requirements, the structure can be retained on the PCB board to play a role in reinforcing and assisting the heat dissipation of the elements.

The above embodiments are only used to further explain the present invention, but the present invention is not limited to the embodiments, and any simple modification, equivalent change and modification of the technical entity of the present invention to the above embodiments all fall into the protection scope of the present invention.

Claims (7)

1. The utility model provides an electronic component equipment prevents structure that skews which characterized in that: comprises a plug-in body (1), a wide plug pin (2) and a narrow plug pin (3); the plug-in body (1) is a cuboid, the size of the plug-in body is not fixed, and the corresponding size is selected according to different sizes of the mounting elements; the wide bolts (2) and the narrow bolts (3) are positioned at the lower end of the plug-in body (1), the sizes of the wide bolts and the narrow bolts are changed along with the size change of the plug-in body (1), a space is reserved between every two adjacent wide bolts (2) and narrow bolts (3), and the sum of the lengths of all the bolts and the space is not more than the length of the bottom edge of the plug-in body (1).

2. The electronic component assembly anti-skew structure of claim 1, wherein: chamfers with different sizes are respectively arranged on two sides of the top end of the plug-in body (1).

3. The electronic component assembly anti-skew structure of claim 2, wherein: the angle of the chamfer is 40-50 degrees, the chamfer on one side is not more than 1mm, and the chamfer on the other side is not less than 1.5 mm.

4. The electronic component assembly anti-skew structure of claim 1, wherein: the distance is not more than the length of the wide bolt (2) and not less than the length of the narrow bolt (3).

5. The electronic component assembly anti-skew structure of claim 1, wherein: at least one wide bolt (2) and at least one narrow bolt (3) are arranged, and the arrangement sequence of the wide bolts (2) and the narrow bolts (3) is not fixed.

6. The electronic component assembly anti-skew structure of claim 5, wherein: the height and thickness of wide bolt (2) and narrow bolt (3) are the same, and the bolt length and thickness of two kinds of bolts all slightly are greater than the groove length and the groove width that correspond the slot on the PCB board, bolt height and PCB board thickness adaptation.

7. An electronic component assembly skew prevention structure according to claim 1, 2 or 5, wherein: the plug-in unit body (1), the wide plug pin (2) and the narrow plug pin (3) are made of the same non-metal material and have certain elasticity; the surface of the plug-in body (1) is coated with a heat-conducting coating.

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