阅读说明：本技术 一种高密距显示终端磁钢座检验治具 (High-density distance display terminal magnetic steel seat inspection jig ) 是由 朱苏 杨亚兴 王婷 于 2021-10-13 设计创作，主要内容包括：本发明涉及一种高密距显示终端磁钢座检验治具,属于LED检验技术领域,包括底座和盖板,底座中部开有矩形平底凹槽,矩形平底凹槽深度稍小于PCB板厚度与灯管高度之和,盖板中部开有矩形通孔,矩形通孔四周向外依次为检测板和盖板边框,盖板边框内缘垂直向下延伸至检测板,检测板开设有若干磁钢座检测孔,检测板的厚度等于待测磁钢座的高度。本发明控制磁钢座高低差小于0.1mm,解决了小间距显示终端因结构件不均导致的高低差问题,保证显示终端的平整均一,降低了生产成本,一次可检验多个磁钢座,避免工人逐个进行检验,方便问题的排查,对于手工焊接或贴片机焊接,钢网刷锡膏的厚度,下坠或受热风吹落等原因都能起到有效的排查作用。(The invention relates to a high-density distance display terminal magnetic steel seat inspection jig, which belongs to the technical field of LED inspection and comprises a base and a cover plate, wherein a rectangular flat-bottom groove is formed in the middle of the base, the depth of the rectangular flat-bottom groove is slightly smaller than the sum of the thickness of a PCB (printed Circuit Board) and the height of a lamp tube, a rectangular through hole is formed in the middle of the cover plate, a detection plate and a cover plate frame are sequentially arranged outside the periphery of the rectangular through hole, the inner edge of the cover plate frame vertically extends downwards to the detection plate, a plurality of magnetic steel seat detection holes are formed in the detection plate, and the thickness of the detection plate is equal to the height of a magnetic steel seat to be detected. The height difference of the magnetic steel seats is controlled to be less than 0.1mm, the height difference problem caused by uneven structural parts of the small-spacing display terminal is solved, the display terminal is guaranteed to be flat and uniform, the production cost is reduced, a plurality of magnetic steel seats can be inspected at one time, workers are prevented from inspecting one by one, the problem is conveniently checked, and the magnetic steel seat height difference control method has an effective checking effect on the reasons of manual welding or chip mounter welding, thickness of steel mesh brush tin paste, falling or hot air blowing and the like.)

1. The utility model provides a high close apart from display terminal magnetic steel seat inspection tool which characterized in that: comprises a base (1) and a cover plate (2), wherein the cover plate (2) is covered on the base (1), a PCB to be tested is placed between the base (1) and the cover plate (2), one surface of the PCB is provided with a lamp tube, the other surface of the PCB is provided with a magnetic steel seat, the lamp tube is placed towards the base (1),

a rectangular flat-bottom groove (5) is formed in the middle of the base (1), the depth of the rectangular flat-bottom groove (5) is smaller than the sum of the thickness of the PCB and the height of the lamp tube,

the detection device is characterized in that a rectangular through hole (23) is formed in the middle of the cover plate (2), a detection plate (22) and a cover plate frame (21) are arranged on the periphery of the cover plate in a one-step shape, the detection plate (22) is located on the inner side of the cover plate frame (21), the thickness of the detection plate is smaller than that of the cover plate frame (21), a plurality of magnetic steel seat detection holes (3) are formed in each side of the detection plate (22), and the thickness of the detection plate (22) is equal to the height of the magnetic steel seats.

2. The high-density distance display terminal magnetic steel seat inspection jig of claim 1, characterized in that: the base (1) and the cover plate (2) are rectangular.

3. The high-density distance display terminal magnetic steel seat inspection jig of claim 1, characterized in that: the long edge of the base (1) outside the rectangular flat-bottom groove (5) is provided with a hand groove (4) relatively, and the hand groove (4) is communicated with the rectangular flat-bottom groove and does not penetrate the edge of the base (1).

4. The high-density distance display terminal magnetic steel seat inspection jig of claim 1, characterized in that: the base (1) is made of bakelite and is processed by a finishing impression machine.

5. The high-density distance display terminal magnetic steel seat inspection jig of claim 1, characterized in that: and semicircular grooves (8) are outwards formed at two ends of the short edge of the rectangular flat-bottom groove (5).

6. The high-density distance display terminal magnetic steel seat inspection jig of claim 1, characterized in that: and one side of the detection plate (22) facing the rectangular through hole (23) is provided with a limiting notch (6) corresponding to the irregular part of the PCB.

7. The high-density distance display terminal magnetic steel seat inspection jig of claim 1, characterized in that: and one surface of the detection plate (22) facing the base (1) is provided with a limiting groove (7) corresponding to the irregular part of the PCB.

8. The high-density distance display terminal magnetic steel seat inspection jig of claim 1, characterized in that: the cover plate (2) is made of aluminum alloy.

Technical Field

The invention relates to a high-density distance display terminal magnetic steel seat inspection jig, and belongs to the technical field of LED inspection.

Background

At present, small-spacing products are widely used in the market, front-dismantling type and rear-dismantling type are divided in the small-spacing display terminal products, the difference is mainly that whether enough space exists for maintenance during installation, and the front-dismantling is selected mainly because of the reason of project site and cannot stand behind for maintenance; when the preceding box of tearing open, divide have the box with do not have the box, the PCB board all need adsorb on the steelframe, can only adsorb by the magnetic steel seat when adsorbing, a display screen is formed by a plurality of PCB board concatenations usually, for guaranteeing the level and smooth of display screen, the reliability and the stability of the magnetic steel seat of the preceding box of tearing open are present booth apart from the problem that the product was treated and is solved.

At present, the magnetic steel seat of the small-distance product is pasted with a sheet by manual welding or by using a common backflow tray, and the following problems exist: manual welding is time-consuming and labor-consuming, two persons are needed for butt welding, the effect is poor, the reject ratio generally reaches 60%, and even if a welding jig is used for welding operation, irregular welding deviation is still difficult to avoid in manual welding; when the reflow tray is used for mounting, the solder paste with the same two surfaces is used, in order to avoid secondary furnace passing of the light emitting tube, the mounting sequence is that the magnetic steel seat is firstly attached and then the lamp surface is attached, so that the magnetic steel seat has the risk of falling, and meanwhile, various uncertain factors exist when the mounting passes through the furnace, for example, the solder paste excessively causes the height of the magnetic steel seat and the foot of the magnetic steel seat, and the magnetic steel seat is blown by furnace wind to generate deviation when passing through the furnace, so that the quality of the mounting is still not high, and the general qualification rate is maintained at about 60%.

The problem of installation quality of the magnetic steel seat is difficult to solve, the qualification rate is difficult to effectively improve, so the inspection after installation can only be checked and adjusted, 10-20 magnetic steel seats are possible on a single PCB, however, the inspection of the magnetic steel seat at present can only be observed through manual eyes or a caliper rule is used for measuring and inspecting the single magnetic steel seat, the labor consumption and accuracy rate for observing the magnetic steel seat by human eyes are low, the caliper rule is low in inspection efficiency one by one, and the requirements of production cost and efficiency cannot be met.

Therefore, a high-density distance display terminal magnetic steel seat inspection jig is needed.

Disclosure of Invention

In order to solve the technical problems, the invention provides a magnetic steel seat inspection jig for a magnetic high-density distance display terminal, which has the following specific technical scheme:

a magnetic steel seat inspection jig of a magnetic high-density distance display terminal comprises a base and a cover plate, wherein the cover plate covers the base, a PCB to be tested is placed between the base and the cover plate, one surface of the PCB is provided with a lamp tube, the other surface of the PCB is provided with a magnetic steel seat, the lamp tube is placed towards the base,

the middle part of the base is provided with a rectangular flat-bottom groove, the depth of the rectangular flat-bottom groove is less than the sum of the thickness of the PCB and the height of the lamp tube,

the cover plate is characterized in that a rectangular through hole is formed in the middle of the cover plate, a detection plate and a cover plate frame are arranged on the periphery of the cover plate, the detection plate is in a one-step shape and located on the inner side of the cover plate frame, the thickness of the detection plate is smaller than that of the cover plate frame, a plurality of magnetic steel seat detection holes are formed in each edge of the detection plate, and the thickness of the detection plate is equal to the height of the magnetic steel seat.

Further, the base and the cover plate are rectangular.

Furthermore, the long edges of the base outside the rectangular flat-bottom grooves are oppositely provided with hand grooves, and the hand grooves are communicated with the rectangular flat-bottom grooves and do not penetrate through the edges of the base.

Further, the base adopts the bakelite material, makes through the cnc engraving and milling machine processing.

Furthermore, semicircular grooves are formed outwards at two ends of the short side of the rectangular flat-bottom groove.

Furthermore, one side of the detection plate, facing the rectangular through hole, is provided with a limiting notch corresponding to the irregular part of the PCB.

Furthermore, one side of the detection plate, which faces the base, is provided with a limiting groove corresponding to the irregular part of the PCB.

Furthermore, the cover plate is made of aluminum alloy.

The invention has the beneficial effects that:

1. the product quality is improved, the height difference of the magnetic steel base is within 0.1mm, the height difference problem caused by uneven structural parts of a small-spacing display terminal is solved to a great extent, and the leveling and uniformity of the display terminal are ensured;

2. the production cost is reduced, and a plurality of magnetic steel seats can be inspected at one time by using the magnetic steel seat inspection device, so that workers are prevented from inspecting one by one;

3. the inspection of the problems is convenient, and the inspection device can effectively inspect the thickness of the solder paste brushed by the steel mesh, the falling or the blowing of heated wind and other reasons during manual welding or chip mounter welding.

Drawings

Figure 1 is a schematic view of the structure of the present invention,

figure 2 is a top view of the cover plate of the present invention,

figure 3 is a side view of the cover plate of the present invention,

figure 4 is an enlarged view of a portion of the semicircular recess of the present invention,

in the figure: the magnetic steel seat detection device comprises a base, a cover plate 2, a cover plate 21, a cover plate frame 22, a detection plate 23, a rectangular through hole, a magnetic steel seat detection hole 3, a hand groove 4, a rectangular flat-bottom groove 5, a limiting notch 6, a limiting groove 7 and a semicircular groove 8.

Detailed Description

The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic views illustrating only the basic structure of the present invention in a schematic manner, and thus show only the constitution related to the present invention.

As shown in figure 1, the high-density distance display terminal magnetic steel seat inspection jig comprises a base 1 and a cover plate 2 which are rectangular, wherein the cover plate 2 covers the base 1, a PCB to be tested is placed between the base 1 and the cover plate 2, one surface of the PCB is provided with a lamp tube, the other surface of the PCB is provided with a magnetic steel seat, the lamp tube is placed towards the base 1,

the middle part of the base 1 is provided with a rectangular flat-bottom groove 5, the depth of the rectangular flat-bottom groove 5 is less than the sum of the thickness of the PCB and the height of the lamp tube,

the middle of the cover plate 2 is provided with a rectangular through hole 23, the periphery of the cover plate is provided with a detection plate 22 and a cover plate frame 21 which are in a first-order step shape, the detection plate 22 is positioned on the inner side of the cover plate frame 21, the thickness of the detection plate 22 is smaller than that of the cover plate frame 21, each side of the detection plate 22 is provided with a plurality of magnetic steel seat detection holes 3, and the thickness of the detection plate 22 is equal to the height of the magnetic steel seats.

The pick-up plate 22 of apron 2 is provided with a spacing breach 6 towards rectangle through-hole 23 one side, and two spacing recesses 7 are opened towards base 1 one side to pick-up plate 22, and spacing breach 6 and spacing recess 7 avoid damaging the part on the PCB board, carry on spacingly to the PCB board simultaneously.

The hand groove 4 has been seted up relatively to the outside base 1's of the flat bottom recess 5 of rectangle of base 1 long limit, and hand groove 4 link up with the flat bottom recess 5 of rectangle, and does not link up the edge of base 1, makes things convenient for taking out of PCB board.

The two ends of the short side of the rectangular flat-bottom groove 5 of the base 1 are outwards provided with semicircular grooves 8, so that the lamp tube is prevented from being damaged when the PCB is placed in the base 1.

The base 1 is made of 20mm bakelite through machining, the bakelite is selected as a material of the base 1 because the surface of the lamp tube is required to be downward for checking the magnetic steel seat, the bakelite is soft, and if other materials are selected, the small-distance lamp tube can be damaged; bakelite is easy to process, but has a certain deformation, so that the deformation of the bakelite is limited by selecting a material with the thickness of 20 mm.

After base 1 is selected, through the cnc engraving and milling machine tooling, guarantee the absolute level and smooth of fluorescent tube face, general booth apart from PCB board thickness is 2mm, and the fluorescent tube height is 1mm, therefore the depth of processing is 2.8mm, makes the PCB board be higher than base 1 slightly.

The cover plate 2 is made of 15mm aluminum alloy, the weight of the aluminum alloy is higher than that of bakelite, the price is low, and the cover plate can be pressed on a PCB to control the deformation.

The size of the general magnetic steel seat is 8mm in diameter and 7mm in height, and the height difference between the general magnetic steel seat and the magnetic steel seats on the two sides is allowed to be within 0.1mm, so that the diameter of the magnetic steel seat detection hole 3 is 8.2mm, and the depth is 7 mm.

During the application, the PCB board that will wait to detect is put in base 1's rectangle flat bottom groove 5, the fluorescent tube is placed down, close apron 2 lid on base 1, spacing breach 6 and spacing recess 7 through base 1 and apron 2 carry on spacingly to the PCB board, whether the magnetism steel base on the PCB board of inspection this moment all is located apron 2 magnetism steel base inspection hole 3, and compare or touch every magnetism steel base with the ruler, whether there is the difference in height between the inspection each magnetism steel base, whether there is the sense of protrusion, discover that certain magnetism steel base height surpasses magnetism steel base inspection hole 3, or be less than magnetism steel base inspection hole 3 and with adjacent magnetism steel base between the difference in height surpass 0.1mm, then mark this magnetism steel base, be convenient for follow-up adjustment.

In light of the foregoing description of the preferred embodiment of the present invention, many modifications and variations will be apparent to those skilled in the art without departing from the spirit and scope of the invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.