CN203490340U - A PCBA board test bench - Google Patents

Abstract

The utility model relates to a PCBA board testboard, compress tightly the subassembly including control box, needle bed, layer board and layer board, the upper end opening of control box is packaged with the needle bed, and the vertical layer board of installing in this needle bed upper end rear portion compresses tightly the subassembly, and vertical slidable mounting has the layer board on the needle bed that corresponds this layer board and compresses tightly the subassembly lower extreme, and the system has a plurality of spy needle holes on this layer board, and vertical the being equipped with probe admittedly on the needle bed that corresponds every spy needle hole, thereby the layer board compresses tightly the subassembly and pushes down the layer board and puts the probe tip in the probe hole that the. The TEST board presses the component down to press the supporting plate through the supporting plate, so that the TEST point of the PCBA board is contacted with the probe, and the purpose of quickly and accurately detecting the performance of the PCBA board is realized. The material of this layer board adopts synthetic stone can prevent that the base plate warp and prevent electrostatic breakdown to can detect heterotypic base plates such as various profile irregularities and flexbile plate, pinpoint the probe and surveyed TEST point.

Description

A PCBA board test bench

technical field

The utility model belongs to the technical field of electronic product manufacturing, in particular to a PCBA board testing platform.

Background technique

At present, in the manufacturing process of electronic products, there is usually an inspection process, that is, to perform performance inspection on the circuit board with electronic components soldered, referred to as PCBA board. The purpose is to detect the connection, welding and electrical properties of each component on the PCB board. test. Traditional PCBA board test fixtures mostly use methods such as screw holes on the substrate itself, positioning hole slots, or edge contour positioning.

However, the above positioning method is likely to cause uneven deformation of the PCBA board, the deviation of the probe from the reserved TEST point, and the large deviation of the current collection value due to the influence of the contact resistance.

Utility model content

The purpose of the utility model is to overcome the deficiencies of the prior art and provide a PCBA board test bench with simple structure, convenient use and reduced false detection rate.

The scheme of the present utility model is realized like this:

A PCBA board test bench, comprising a control box, a needle bed, a supporting plate and a supporting plate pressing assembly, the upper opening of the control box is packaged with a needle bed, and the upper rear part of the needle bed is vertically installed with a supporting plate pressing Assemblies, a supporting plate is vertically slidably installed on the needle bed at the lower end of the supporting plate pressing assembly, and a plurality of probe holes are formed on the supporting plate, and probes are fixed vertically on the needle bed corresponding to each probe hole, The support plate pressing assembly presses down the support plate so that the end of the probe is placed in the probe hole formed on the support plate.

Moreover, the pallet pressing assembly includes a supporting plate, a linkage pressing rod, a pressing plate and a guide post, the supporting plate is fixed on a needle bed, and two connecting ears are installed horizontally and symmetrically on both sides of the front end of the supporting plate. A guide post is installed vertically between the connecting ear and the needle bed, and a vertically sliding pressing plate is installed between the two guiding posts, and the pressing plate controls its vertical movement through a linkage pressing bar installed on the support plate.

Moreover, the supporting plate is movably connected with the needle bed through four positioning rods. The specific structure is: the upper end of the positioning rod is fixedly mounted with the supporting plate, and the lower end of the positioning rod is coaxially fitted with a return spring. The return spring is embedded in the counterbore formed on the needle bed.

Moreover, a rectangular groove for positioning the PCBA board is formed on the supporting plate, and an inner groove is formed in the rectangular groove.

Moreover, arc-shaped grooves are formed on both sides of the rectangular groove.

Moreover, a pressing block is installed on the lower end surface of the pressing plate.

Advantage and positive effect of the present utility model are:

The test bench presses down the supporting plate through the supporting plate pressing component, so that the TEST point of the PCBA board is in contact with the probe, so as to realize the purpose of quickly and accurately testing the performance of the PCBA board. The material of the pallet is made of synthetic stone, which can prevent the deformation of the substrate and prevent electrostatic breakdown, and can detect various irregular contours and flexible boards and other special-shaped substrates, and accurately locate the probe and the tested TEST point. In actual production, the false detection rate of PCBA substrate is reduced, the detection rate of defective products is effectively improved, and the production efficiency and product quality of products are greatly improved.

Description of drawings

Fig. 1 is the front view of the utility model;

Fig. 2 is an enlarged view of part I in Fig. 1;

Fig. 3 is a top view of the utility model pallet;

Fig. 4 is a sectional view taken along line A-A of Fig. 3 .

Detailed ways

Below in conjunction with accompanying drawing and through specific embodiment the utility model is described in further detail.

A kind of PCBA board test stand, as shown in Figure 1, comprises control box 8, needle bed 7, supporting plate 12 and supporting plate pressing assembly, described control box is a rectangular box body structure, and the upper opening of this box body encapsulates A needle bed with a rectangular plate structure, a supporting plate pressing assembly is installed vertically on the rear of the upper end of the needle bed, and a supporting plate is vertically slidably installed on the needle bed corresponding to the lower end of the supporting plate pressing assembly. Probe hole 16, be thirteen probe holes in the present embodiment, as shown in Figure 2, the needle bed corresponding to each probe hole is vertically fixed with probe 11, and described supporting plate presses down assembly Press the supporting plate so that the end of the probe is placed in the probe hole formed on the supporting plate, and the lower end of the probe communicates with the cable (not shown in the figure) in the control box.

In this embodiment, the pallet pressing assembly includes a support plate 1, a linkage pressure rod 2, a pressure plate 3 and a guide column 6. The support plate is an inverted "concave" structure and is fixed to the needle bed. Two connection ears 5 are installed horizontally and symmetrically on both sides of the front end surface of the support plate, and guide columns are installed vertically between the connection ears and the needle bed, and a vertically sliding pressure plate is installed between the two guide columns. The vertical movement of the pressing plate is controlled by a linkage pressing rod installed on the support plate.

The supporting plate is movably connected with the needle bed through four positioning rods 10, and its specific structure is shown in Figure 2. The upper end of the positioning rod is fixed with the supporting plate, and the lower end of the positioning rod is coaxially sleeved One return spring 13, this return spring is embedded in the counterbore that needle bed is shaped on, and this return spring and positioning rod can make supporting plate lift up and down freely and be stressed evenly. The supporting plate is a rectangular plate structure as shown in Figure 3 and Figure 4, and a rectangular groove 14 for positioning the PCBA board (not shown in the figure) is milled out on it, and a concave groove is formed in the rectangular groove Groove 15, the rectangular groove corresponds to the shape of the PCBA board and is in contact with its lower end surface. The TEST point on the lower end surface of the PCBA board is located in the inner groove and does not contact the bottom surface of the inner groove. In order to facilitate the removal of the PCBA board, the The both sides of described rectangular groove all are shaped on arc groove 17. The supporting plate is made of synthetic stone, which is made of a high-temperature nano-composite material, and has the advantages of antistatic, high temperature resistance, and no deformation.

It should be noted that the position and number of probes in this test bench are designed according to the tested PCBA board. Since there are many different components soldered on the PCB board, some components have irregular external shapes or cannot be stressed. Therefore, Generally, a lower pressure block 4 is installed on the lower end surface of the pressure plate, for example, the lower pressure block is in contact with a relay component that has a regular shape and can withstand a certain pressure.

A switch 9 is installed on the front end face of the control box.

The using method of the utility model is:

Step 1, first place the PCBA board in the rectangular groove with its components facing up;

Step 2, press down the handle of the linkage pressure rod to move the pressure plate downwards, and the lower pressure block just contacts the components (such as relays) on the PCBA board, while other components do not contact the lower end surface of the pressure plate;

Step 3, the TEST points on the bottom surface of the PCBA board are in contact with the probes one by one, so that the performance indicators of the PCBA board can be quickly detected;

Step 4: After the test is completed, lift the handle of the linkage pressure bar, and the supporting plate is reset due to the action of the return spring.

The test bench presses down the supporting plate through the supporting plate pressing component, so that the TEST point of the PCBA board is in contact with the probe, so as to realize the purpose of quickly and accurately testing the performance of the PCBA board. The material of the pallet is made of synthetic stone, which can prevent the deformation of the substrate and prevent electrostatic breakdown, and can detect various irregular contours and flexible boards and other special-shaped substrates, and accurately locate the probe and the tested TEST point. In actual production, the false detection rate of PCBA substrate is reduced, the detection rate of defective products is effectively improved, and the production efficiency and product quality of products are greatly improved.

It should be emphasized that the embodiments described in the utility model are illustrative rather than restrictive, so the utility model includes but not limited to the embodiments described in the specific implementation, and those skilled in the art according to the utility model Other implementations derived from the new technical solution also belong to the scope of protection of the utility model.

Claims (6)

1. a PCBA board test bench, is characterized in that: comprise control box, needle bed, supporting plate and supporting plate pressing assembly, the upper end opening of described control box is packaged with needle bed, and this needle bed top rear part is vertical A supporting plate pressing assembly is installed, and a supporting plate is vertically slid on the needle bed corresponding to the lower end of the supporting plate pressing assembly, and a plurality of probe holes are formed on the supporting plate, and the needle bed corresponding to each probe hole is vertically slid. The probe is fixedly installed, and the support plate pressing component presses down the support plate so that the end of the probe is placed in the probe hole formed on the support plate. the 2. The PCBA board test bench according to claim 1, characterized in that: the pallet pressing assembly includes a support plate, a linkage pressure bar, a pressure plate and a guide column, the support plate is fixed on a needle bed, and the support plate Two connecting ears are installed horizontally and symmetrically on both sides of the front end of the plate, and guide columns are installed vertically between the connecting ears and the needle bed, and a vertically sliding pressing plate is installed between the two guiding columns. The linkage pressing rod on the support plate controls its vertical action. the 3. PCBA board test bench according to claim 2, is characterized in that: described supporting plate is movably connected together with needle bed by four positioning rods, and concrete structure is: the upper end of described positioning rod is fixed with supporting plate. Installed together, the lower end of the positioning rod is coaxially fitted with a return spring, and the return spring is embedded in the counterbore formed on the needle bed. the 4. The PCBA board test bench according to claim 3, characterized in that: the supporting plate is formed with a rectangular groove for positioning the PCBA board, and an inner groove is formed in the rectangular groove. the 5. The PCBA board test bench according to claim 4, characterized in that: arc-shaped grooves are formed on both sides of the rectangular groove. the 6. The PCBA board test bench according to claim 5, characterized in that: a pressure block is installed on the lower end surface of the pressure plate. the

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