CN204855733U - Needle bed testing arrangement - Google Patents

Abstract

The utility model relates to a needle bed testing device, which comprises a plurality of probes arranged in an array. The probes are respectively pierced through corresponding positioning holes on a probe positioning plate and welded with an adapter plate. The position is consistent with the position of the test point on the circuit board under test, and the shape and size of the probe positioning board are consistent with the shape and size of the circuit board under test; The needle bed main control board is electrically connected. The beneficial effects of the utility model are: not only simple structure, good compatibility and easy replacement and maintenance, but also simple operation, high reliability, easy maintenance and management.

Description

A bed of needles testing device

technical field

The utility model relates to the field of circuits, in particular to a bed of needles testing device.

Background technique

In order to test the electrical characteristics of mass-produced circuit boards, a bed of needles tester is essential. The traditional needle bed structure design is to use an electric drill to punch holes on the acrylic board that are opposite to the test points of the main board to be tested, and install probes. Then use flying wires to connect the probes to the main control board. This kind of bed of needles tester not only has a complex structure and a long production period, but also the actual alignment error of the tester will be caused by the looseness and wear of the tester components and the deformation during the PCB manufacturing test. , but cannot clearly judge the treatment, thus increasing the difficulty of debugging and maintenance. At the same time, with the improvement of PCB assembly density, especially the shorter R&D and production cycle of fine-pitch SMT assembly products, and the increasing variety of circuit boards, the accuracy and speed of high-precision needle bed fixture manufacturing, debugging, and testing are very prominent. In order to achieve zero-defect manufacturing and shorten the production cycle, it is increasingly urgent to design a bed of needle tester with standardized dimensions, modular structure, high precision, and good compatibility.

Utility model content

The purpose of this utility model is to provide a bed of needles testing device for the above shortcomings, so as to realize simple and reliable testing.

The solution adopted by the utility model to solve the technical problem is: a bed of needles testing device, including a plurality of probes arranged in an array, and the probes are respectively set on a corresponding positioning hole on a probe positioning plate and a transfer joint Board welding, the position of the positioning hole is consistent with the position of the test point on the tested circuit board; the welding point where the probe is welded to the adapter board is electrically connected to the main control board of the needle bed through several cables ; The flat lines are in one-to-one correspondence with the welding points.

Further, it also includes a test bench for circuit board testing, the upper end of the test bench is provided with an opening, the probe positioning plate is fixed on both sides of the opening via bolts, and the probes are connected to the opening through the opening. The adapter plate located in the test bench is welded, and the needle bed main control board is located on one side of the adapter plate and is fixed in the test bench by bolts.

Further, it also includes a vertical support frame vertically fixed on the upper end surface of the test bench, and a pressure plate for fixing the circuit board under test to the top of the probe is arranged laterally on the vertical support frame. Slide rails are arranged on both sides of the vertical support frame, and the pressure plate moves up and down along the vertical support frame through the slide rails.

Further, the probes are respectively welded to the adapter plate via sleeves embedded in the positioning holes.

Further, it also includes a printer electrically connected to the main control board of the needle bed, and the printer is fixed on the upper end surface of the test table.

Further, it also includes a liquid crystal display screen electrically connected to the main control board of the needle bed and used for displaying test results, and the liquid crystal display screen is fixed on the main control board of the needle bed.

Further, the upper end surface of the test bench is made of plexiglass.

Compared with the prior art, the utility model has the following beneficial effects: through the probe embedded in the positioning hole strictly corresponding to the position of the test point of the main board to be tested, and then through the adapter board, the bottom end of the probe is connected to the After the adapter board is welded, it is electrically connected to the main control circuit through the cable on the adapter board, and the reliability is high.

Description of drawings

Below in conjunction with accompanying drawing, the utility model patent is further described.

Fig. 1 is the structural representation that the utility model implements.

In the figure: 1-vertical support frame; 2-pressure plate; 3-tested circuit board; 4-probe; 5-probe positioning board; 6-transfer board; -needle bed main control board; 10-LCD display; 11-printer; 12-bolt.

Detailed ways

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

As shown in Fig. 1, a kind of bed of needles testing device of the present embodiment comprises a plurality of probes 4 arranged in an array, and the probes 4 are respectively pierced through a corresponding positioning hole on a probe positioning plate 5 and a rotating shaft. The connecting board 6 is welded, and the position of the positioning hole is consistent with the position of the test point on the tested circuit board 3; The bed main control board 9 is electrically connected; the flat cables 7 correspond to the soldering points one by one.

It can be seen from the above that the beneficial effect of the present invention is that the position of the positioning hole on the probe positioning plate 5 is strictly consistent with the position of the test point on the circuit board 3 under test, and the position of the positioning hole welded with the probe 4 The connection board 6 is used to electrically connect the soldering point of the probe 4 and the adapter board 6 to the needle bed main control board 9 through the cable 7, thereby improving the reliability of the circuit board under test 3 during the test and reducing contact deviation and test errors caused by interference.

In this embodiment, it also includes a test bench 8 for testing the circuit board 3 under test, an opening is provided on the upper end of the test bench 8, and the probe positioning plate 5 is fixed on both sides of the opening via bolts 12 , the probe 4 is welded to the adapter plate 6 located in the test bench 8 through the opening, the needle bed main control board 9 is located on one side of the adapter plate 6 and is fixed to the test bench by bolts 12 8 within. Welding by the bolts 12 facilitates corresponding replacement of the probe positioning board 5 according to the tested circuit board 3 . The probe 4 passes through the opening and is welded to the adapter plate 6 inside the test bench 8 .

In this embodiment, it also includes a vertical support frame 1 vertically fixed on the upper end surface of the test bench 8, and a vertical support frame 1 is provided horizontally on the vertical support frame 1 for fixing the circuit board under test 3 on the probe. The pressure plate 2 at the top of the needle 4 is provided with slide rails on both sides of the vertical support frame 1, and the pressure plate 2 moves up and down along the vertical support frame 1 through the slide rails. The circuit board 3 under test can be better fixed or removed by the pressure plate 2 which can move up and down.

In this embodiment, the probes 4 are respectively welded to the adapter plate 6 via sleeves embedded in the positioning holes.

In this embodiment, a printer 11 electrically connected to the needle bed main control board 9 is also included, and the printer 11 is fixed on the upper end surface of the test table 8 .

In this embodiment, it also includes a liquid crystal display 10 electrically connected with the needle bed main control board 9 and used for displaying test results, and the liquid crystal display 10 is fixed on the needle bed main control board 9 .

In this embodiment, the upper surface of the test bench 8 is made of glass. The measurement results are better observed through the upper face of the glass material.

To sum up, the utility model provides a bed of needles testing device, which is not only simple in structure, good in compatibility and easy to replace and repair, but also simple in operation, high in reliability, easy in maintenance and management.

The above preferred embodiments have further described the purpose, technical solutions and advantages of the utility model in detail. It should be understood that the above descriptions are only preferred embodiments of the utility model and are not intended to limit the utility model. For new models, any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present utility model shall be included within the protection scope of the present utility model.

Claims (7)

1. A bed of needles testing device, characterized in that: comprise some probes arranged in an array, said probes are respectively pierced through corresponding positioning holes on a probe positioning plate and welded with an adapter plate, said positioning The position of the hole is consistent with the position of the test point on the tested circuit board; the welding point welded between the probe and the adapter board is electrically connected to the main control board of the needle bed through several flat lines; the flat lines are respectively One-to-one correspondence with the welding points. 2. A bed of needles testing device according to claim 1, characterized in that: it also includes a test bench for circuit board testing, the upper end of the test bench is provided with an opening, and the probe positioning plate is passed through a bolt Fixed on both sides of the opening, the probe is welded to the adapter plate located in the test bench through the opening, the needle bed main control board is located on one side of the adapter plate and fixed to the test bed by bolts Taiwan. 3. A kind of bed of needles testing device according to claim 2, characterized in that: it also includes a vertical support frame vertically fixed on the upper end surface of the test table, and a horizontal support frame is arranged on the vertical support frame for The tested circuit board is fixed on the pressure plate at the top of the probe, slide rails are arranged on both sides of the vertical support frame, and the pressure plate moves up and down along the vertical support frame through the slide rails. 4 . The needle bed testing device according to claim 2 , further comprising a printer electrically connected to the needle bed main control board, and the printer is fixed on the upper end surface of the test table. 5. A bed of needles testing device according to claim 2, characterized in that: the upper end surface of the test table is made of plexiglass. 6 . The bed of needles testing device according to claim 1 , wherein the probes are respectively welded to the adapter plate via sleeves embedded in the positioning holes. 7 . 7. A needle bed testing device according to claim 1, characterized in that: it also comprises a liquid crystal display that is electrically connected to the needle bed main control board and used to display test results, and the liquid crystal display is fixed on the main control board of the needle bed.