WO2020051828A1

WO2020051828A1 - Circuit board testing device

Info

Publication number: WO2020051828A1
Application number: PCT/CN2018/105451
Authority: WO
Inventors: 倪晔波
Original assignee: 太仓德纳森机电工程有限公司
Priority date: 2018-09-13
Filing date: 2018-09-13
Publication date: 2020-03-19
Also published as: DE212018000034U1

Abstract

A circuit board testing device, comprising a working table (1), a feeding mechanism (2), and an electrical testing mechanism (3). The feeding mechanism (2) and the electrical testing mechanism (3) are both located on the working table (1); the electrical testing mechanism (3) is located at the downstream of the feeding mechanism (2); the feeding mechanism (2) comprises a bearing plate (21), limiting rods (22), and a lifting and lowering driving mechanism driving the bearing plate to lift and lower up and down; a plurality of circuit boards is placed on the bearing plate (21); the lower ends of the limiting rods (22) are fixed on the working table (1); the upper ends of the limiting rods (22) pass through the bearing plate (21) and are in contact with the edges of the circuit boards (4). The present device can not only improve safety and test efficiency of circuit board testing, thereby ensuring the quality of circuit boards, but also effectively prevent circuit boards (4) from being damaged during testing.

Description

Circuit board test device

Technical field

The utility model belongs to the technical field of detection equipment, and particularly relates to a circuit board testing device.

Background technique

PCB, also called printed wiring board, is an important electronic component. In the production process of circuit boards, it is unavoidable that electrical defects such as short circuits, open circuits and leakage caused by external factors, coupled with the continuous evolution of circuit boards to high density, fine pitch and multiple levels, if the failure is not timely The board is screened out and left to flow into the next process, which will definitely cause more cost waste. Therefore, in addition to the process control, it is necessary to improve the technology of circuit board testing to improve product yield.

At present, most circuit boards are manually tested to confirm whether there is an abnormality in the circuit of each part of the circuit board. However, manual detection is inefficient, requires a lot of manpower, cannot meet the needs of large-scale production of enterprises, and some electrical measurements are high voltage. Testing, because the test voltage is too high, testers have great security risks.

Utility model content

The main purpose of the utility model is to provide a circuit board testing device, which not only improves the safety and efficiency of circuit board detection, ensures the quality of the circuit board, but also effectively prevents the circuit board from being damaged during the detection process.

In order to solve the above technical problems, the utility model adopts a technical solution as follows: A circuit board testing device includes a workbench, a feeding mechanism, and an electric measuring mechanism, and the feeding mechanism and the electric measuring mechanism are both located on the workbench. Above, the electrical measuring mechanism is located downstream of the feeding mechanism;

The feeding mechanism includes a carrier board, a limit rod, and a lifting drive mechanism that drives the carrier board to move up and down. A plurality of the circuit boards are placed above the carrier board, and the lower end of the limit rod is fixed to the workbench. An upper end of the limit rod passes through the carrier board and is in contact with an edge of the circuit board;

The electrical measuring mechanism includes a stylus, a base, and a fixed frame, the stylus is fixed to the base, and the base is detachably connected to the fixed frame;

The fixing frame includes a support rod and a mounting rod, the support rod is provided with two, the lower ends of the two support rods are fixed to the workbench, and the upper ends of the two support rods are respectively connected to both ends of the mounting rod, The mounting rod has a mounting hole matching the base, a positioning protrusion is provided on a side wall of the base, and an inner surface of the mounting hole is provided with a positioning recess corresponding to the positioning protrusion. ;

The controller further includes a controller, and the lifting driving mechanism and the stylus are electrically connected to the controller.

Further, the lifting driving mechanism includes a lifting board and a lifting driving motor for driving the board to move up and down, the lifting board is located between the carrier board and the workbench, and the limit rod passes through the carrier board. The carrier plate and the lifting plate are connected by a connecting member, the lifting driving motor is fixed to the lifting plate, an output shaft of the lifting driving motor is connected to a screw rod, and the screw rod is connected to a table.

Further, the connecting member is a support spring, the support spring is sleeved on the limit rod, and two ends of the support spring are in contact with the lifting plate and the carrier plate, respectively.

Further, the positioning protrusion is a ball, and the ball is installed in a positioning hole of the base. A positioning spring is provided between the ball and the bottom surface of the positioning hole to make the ball protrude from the outer surface of the base.

Further, the stylus is fixed on the lower surface of the base, at least one bar is provided on the side wall of the mounting hole, and the base is located above the bar.

Further, the inner wall of the positioning hole is provided with a circle of limiting protrusions to restrict the balls from sliding out of the positioning hole.

The beneficial effects of the utility model have at least the following points:

The utility model comprises a feeding mechanism and an electric measuring mechanism. The carrier board of the feeding mechanism is provided with a lifting driving mechanism that drives the circuit board to move up and down, so that the circuit board can be tested after being lifted. The personnel need not directly contact the circuit board being tested. Adopting automatic control to free up labor and improve detection efficiency;

The lower end of the limit rod of the utility model is fixed to the workbench, and the upper end of the limit rod passes through the carrier board and interferes with the edge of the circuit board. It is mentioned that the lifting drive mechanism includes a lifting board and a lifting drive motor that drives the board to move up and down. The carrier board and the lifting board are connected by a connector. The lifting drive motor is fixed to the lifting board, and the output shaft of the lifting drive motor is connected to the wire. Rod connection, the screw is connected to the workbench, so that the circuit boards to be tested can be raised to the same height for testing;

The connecting piece of the utility model is a support spring, the support spring is sleeved on the limit rod, and the two ends of the support spring are in contact with the lifting plate and the carrier plate, so that when the stylus contacts the circuit board, the support spring acts on the circuit board. Buffer function to prevent the stylus from damaging the circuit board;

The base of the utility model is detachably connected to a fixed frame. The base is provided with a ball, and the inner surface of the mounting hole is provided with a positioning recess corresponding to the ball, so that the base is stably installed on the mounting rod, which is convenient for the probe. Replacement to ensure the quality of the test, and even better, when the contact force between the stylus and the circuit board is too large, the base can fall off the mounting hole of the mounting rod, effectively preventing the circuit board from being damaged.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a schematic structural diagram of the present invention;

2 is a sectional view of a mounting rod of the present invention;

3 is a sectional view of a base of the present invention;

4 is a sectional view of the present invention;

Each part in the drawing is marked as follows:

Table 1, feeding mechanism 2, carrier plate 21, limit lever 22, lifting plate 23, lifting driving motor 24, connecting piece 25, screw rod 26, electrical measuring mechanism 3, stylus 31, base 32, positioning protrusion 321, positioning hole 322, limiting protruding ring 3221, positioning spring 323, support rod 33, mounting rod 34, mounting hole 341, positioning recess 3411, bar 3412, circuit board 4 and controller 5.

detailed description

The preferred embodiments of the present invention will be described in detail below with reference to the drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, so that the protection scope of the present invention can be more clearly defined. .

Example: A circuit board testing device, as shown in Figs. 1-4, the present utility model includes a table 1, a feeding mechanism 2, and an electric measuring mechanism 3. The feeding mechanism 2 and the electric measuring mechanism 3 are both located at the station. Above the workbench 1, the electrical measuring mechanism 3 is located downstream of the feeding mechanism 2;

The feeding mechanism 2 includes a carrier board 21, a limit rod 22, and a lifting drive mechanism that drives the carrier board 21 to move up and down. A plurality of the circuit boards 4 are placed above the carrier board 21. The lower end is fixed to the workbench 1, and the upper end of the limit rod 22 passes through the carrier board 21 and is in contact with the edge of the circuit board 4;

The electrical measuring mechanism 3 includes a stylus 31, a base 32, and a fixing frame, the stylus 31 is fixed to the base 32, and the base 32 is detachably connected to the fixing frame;

The fixing frame includes a support rod 33 and a mounting rod 34. The support rod 33 is provided with two, the lower ends of the two support rods 33 are fixed to the workbench 1, and the upper ends of the two support rods 33 are respectively installed with the mounting rods. The two ends of the rod 34 are connected. The mounting rod 34 has a mounting hole 341 matching the base 32. The side wall of the base 32 is provided with a positioning protrusion 321. The inner surface of the mounting hole 341 is provided. A positioning recess 3411 corresponding to the positioning protrusion 321;

A controller 5 is further included, and the lifting driving mechanism and the stylus 31 are all electrically connected to the controller 5.

The lifting driving mechanism includes a lifting plate 23 and a lifting driving motor 24 that drives the circuit board 4 to move up and down. The lifting plate 23 is located between the carrier plate 21 and the workbench 1, and the limit rod 22 passes through the carrier. Plate 21, the carrier plate 21 and the lifting plate 23 are connected by a connecting member 25, the lifting driving motor 24 is fixed to the lifting plate 23, and the output shaft of the lifting driving motor 24 is connected to the screw rod 26, so The screw rod 26 is connected to the table 1.

The connecting member 25 is a support spring, the support spring is sleeved on the limit rod 22, and two ends of the support spring are in contact with the lifting plate 23 and the carrier plate 21, respectively.

The positioning protrusion 321 is a ball, and the ball is installed in a positioning hole 322 of the base 32. A positioning spring 323 is provided between the ball and the bottom surface of the positioning hole 322 so that the ball protrudes out of the base 32. surface.

The lower surface of the base 32 is fixed with the stylus 31, and the side wall of the mounting hole 341 is provided with at least one bar 3412, and the base 32 is located above the bar 3412.

A circle of limiting protrusions 3221 is provided on the inner wall of the positioning hole 322 to restrict the balls from sliding out of the positioning hole 322.

The working principle of the utility model is as follows. Several circuit boards are manually placed on the carrier board. The lifting drive mechanism lifts the circuit board to a certain height under the control of the controller to detect the circuit board in contact with the stylus. The support spring plays a certain role. The buffering effect prevents the stylus from damaging the circuit board. After the test is completed, the circuit board is lowered by the lifting drive mechanism. The circuit board detected at the top layer is manually removed, and the circuit board detection at the lower layer is continued to improve the circuit board detection. Safety and detection efficiency to ensure the quality of the circuit board.

The above description is only an embodiment of the present invention, and thus does not limit the scope of the patent of the present invention. Any equivalent structural transformation made using the description of the utility model and the contents of the drawings, or directly or indirectly used in other related technical fields It is included in the scope of patent protection of the utility model for the same reason.

Claims

A circuit board testing device is characterized in that it includes a workbench (1), a feeding mechanism (2), and an electric testing mechanism (3), and the feeding mechanism and the electric testing mechanism are both located above the workbench, The electrical measuring mechanism is located downstream of the feeding mechanism;

The feeding mechanism includes a carrier board (21), a limit rod (22), and a lifting drive mechanism for driving the carrier board to move up and down. A plurality of the circuit boards (4) are placed above the carrier board, and the limit The lower end of the rod is fixed to the workbench, and the upper end of the limit rod passes through the carrier board and interferes with the edge of the circuit board;

The electrical measuring mechanism includes a stylus (31), a base (32), and a fixing frame, the stylus is fixed to the base, and the base is detachably connected to the fixing frame;

The fixing frame includes a support rod (33) and a mounting rod (34). The support rod is provided with two, the lower ends of the two support rods are fixed to the workbench, and the upper ends of the two support rods are respectively installed with the installation rod. The two ends of the rod are connected. The mounting rod has a mounting hole (341) matching the base. The side wall of the base is provided with a positioning protrusion (321). The inner surface of the mounting hole is provided with A positioning recess (3411) corresponding to the positioning protrusion;

A controller (5) is further included, and the lifting driving mechanism and the stylus are all electrically connected to the controller.
The circuit board testing device according to claim 1, wherein the lifting driving mechanism comprises a lifting board (23) and a lifting driving motor (24) for driving the circuit board to move up and down, the lifting board is located on the carrier board and works. Between the platforms, and the limit rod passes through the carrier board, the carrier board and the lifting board are connected by a connecting member (25), the lifting drive motor is fixed to the lifting board, and the lifting drive The output shaft of the motor is connected to a screw rod (26), which is connected to the table.
The test device for a circuit board according to claim 2, wherein the connecting member is a support spring, the support spring is sleeved on the limit rod, and both ends of the support spring are connected to a lifting board and a load, respectively. Board conflict.
The testing device for a circuit board according to claim 1, wherein the positioning protrusion is a ball, and the ball is installed in a positioning hole (322) of the base, and a space is provided between the ball and a bottom surface of the positioning hole. There are positioning springs (323) to make the balls protrude from the outer surface of the base.
The testing device for a circuit board according to claim 1, wherein the stylus is fixed on the lower surface of the base, and at least one bar (3412) is provided on the side wall of the mounting hole, and the base The seat is located above the bar.
The testing device for a circuit board according to claim 4, characterized in that: an inner wall of the positioning hole is provided with a circle of limiting protrusions (3221) to restrict the balls from sliding out of the positioning hole.