TWI398635B - Detecting device - Google Patents

Description

Testing Equipment

The invention relates to a detecting device, in particular to a testing device for testing a bending deformation test of a circuit board.

Most printed circuit boards (PCBs) need to be mounted on the machine components by screws. During the assembly process, it is often encountered that the board is bent and deformed after being locked. More severe bending deformation may cause damage to the wiring or electronic components on the board, which may affect the quality of the product design and the quality of the finished product. Therefore, in the product design, the board should be tested for bending deformation to determine the maximum deflection value it can withstand.

At present, most of the analysis and research on the failure mode of the bending deformation of the similar circuit board are directly subjected to the bending deformation test by the projector measuring system or the three-dimensional detecting system. However, the existing projector measuring system or the three-dimensional detecting system is bulky, complicated in structure, and high in cost.

In view of this, it is necessary to provide a detection device that is simple in structure and low in cost.

A detecting device for detecting whether a circuit board is ineffective, comprising a measuring device and a monitoring device, the measuring device comprising a base, a positioning component, a spiral micrometer and a holding mechanism, wherein the positioning component is fixed at the a susceptor, the spiral micrometer is movably connected to the positioning component for resisting one end of the circuit board, and the holding mechanism is placed on the pedestal for fixing the other end of the circuit board. The monitoring device is electrically connected to the circuit board for determining whether the circuit board is invalid.

Compared with the prior art, the detecting device provided by the present invention measures the bending angle of the bending deformation of the circuit board by measuring the displacement amount of the measuring screw of the spiral micrometer, so that the measurement is accurate, and the detecting device has a simple structure and a cost. Lower.

100‧‧‧Measurement device

120‧‧‧Base

140‧‧‧cantilever

142‧‧‧ column

144‧‧‧Cantilever beam

160‧‧‧Spiral micrometer

161‧‧‧Top needle

162‧‧‧ Measuring screw

163‧‧‧Installation bushing

164‧‧‧Scale sleeve

165‧‧‧Differential sleeve

166‧‧‧ratchet

170‧‧‧ Slider

172‧‧‧Sliding section

1722‧‧‧Chute

174‧‧‧ Department of Maintenance

176‧‧‧Bolts

180‧‧‧Support

182‧‧‧ fixed department

200‧‧‧Monitor

300‧‧‧Webcam

400‧‧‧Signal output components

600‧‧‧ boards

606‧‧‧ hole

608‧‧‧ hole

900‧‧‧Testing equipment

1 is a perspective view of a detecting device with a circuit board fixed thereto; FIG. 2 is a front view of a spiral micrometer of the detecting device of the present invention; and FIG. 3 is a perspective view of the detecting device of the present invention when measuring a circuit board.

The invention provides a detecting device, and the preferred embodiment of the detecting device can be applied to the test of the bending deformation failure of the circuit board.

Referring to FIG. 1 , the testing apparatus 900 for testing a bending deformation failure of a circuit board includes a measuring device 100 , a monitoring device 200 , a camera 300 , and a signal output component 400 .

The measuring device 100 includes a base 120, a cantilever frame 140, a spiral micrometer 160, a slider 170 and a support body 180.

The base 120 is a plate-shaped platform for fixing the cantilever frame 140 and the support body 180.

The cantilever frame 140 includes a column 142 and a cantilever beam 144. The cantilever beam 144 is formed by extending one end of the column 142 in a direction perpendicular to the column 142. The cantilever beam 144 is parallel to the base 120. The cross-section of the column 142 and the cantilever beam 144 are both rectangular, and the cross-sectional area of the column 142 is larger than the cross-sectional area of the cantilever beam 144.

The slider 170 includes a sliding portion 172 and a holding portion 174. The sliding portion 172 is substantially rectangular, and a rectangular sliding slot 1722 is defined on a side surface thereof. The slider 170 is sleeved on the cantilever frame 140 by the sliding slot 1722. The cantilever beam 144 has a substantially rectangular shape and is fixed to one side of the sliding portion 172. The A circular through hole (not shown) is defined in the middle of the top surface of the holding portion 174. The spiral micrometer 160 can pass through the through hole and is fixed in the through hole by a bolt 176.

The support body 180 is a cylinder that is vertically fixed to the base 120. A fixing portion 182 is concentrically disposed on one end surface of the support body 180. The fixing portion 182 is a cylinder having a diameter smaller than the diameter of the supporting body 180. The fixing portion 182 is provided with a threaded hole (not shown) into which a screw can be screwed.

Referring to FIG. 2, the spiral micrometer 160 is formed by sequentially connecting a needle 161, a measuring screw 162, a mounting sleeve 163, a scale sleeve 164, a differential sleeve 165 and a ratchet 166. The thimble head 161 is fixed to one end of the measuring screw 162 by a screw. By rotating the ratchet 166, the measuring screw 162 can drive the thimble head 161 against the circuit board 600 to bend the circuit board 600.

The monitoring device 200 is an electrical signal monitoring device. In this embodiment, a computer is electrically connected to the circuit board 600 for monitoring whether the circuit board 600 has failed.

A hole 606, 608 is defined in each of the two ends of the circuit board 600. A hole 606 is used for receiving the fixing portion 182 to fix the circuit board 600. The ejector pin 161 is clamped on the edge of the other hole 608. The diameter of the hole 608 is smaller than the diameter of the ejector pin 161.

The camera 300 and the signal output component 400 are disposed on the circuit board 600. The camera 300 is configured to capture images, and the signal output component 400 is electrically connected to the monitoring device 200 to transmit the image signals captured by the camera 300 to the monitoring device 200.

When assembled, the cantilever frame 140 is fixed to the base 120 by a free end of the column 142. The cantilever beam 144 at the other end of the column 142 is suspended above the base 120. The rectangular sliding slot 1722 of the sliding portion 172 is sleeved on the cantilever beam 144 of the cantilever frame 140, and the slider 170 can slide along the cantilever beam 144 of the cantilever frame 140 by its sliding portion 172. Thereafter, the spiral micrometer 160 is passed through the slider 170 The through hole in the holding portion 174 is used to set the spiral micrometer 160 on the slider 170, and the spiral micrometer 160 is tightened by a bolt 176. Finally, one end of the support body 180 opposite to the fixing portion 182 is fixed on the base 120. The distance between the column 142 of the cantilever frame 140 and the support body 180 can be adjusted according to the size of the circuit board to be tested. The circuit board 600 is sleeved on the fixing portion 182 by a hole 606, and a screw is screwed into the screw hole of the fixing portion 182 to fix the circuit board 600 horizontally to the fixing portion 182. Finally, the monitoring device 200 is electrically coupled to the signal output component 400 via a data line.

During the test, the position of the spiral micrometer 160 is adjusted by the sliding portion 172 so that the ejector pin 161 is opposite to the hole 608 of the circuit board 600, and the ratchet 166 of the spiral micrometer 160 is rotated to bring the ejector pin 161 into contact with the thimble 161. The hole 608 of the circuit board 600 is walled and the value of the spiral micrometer 160 is recorded. Then, the ratchet wheel 166 of the spiral micrometer 160 is rotated to cause the ejector pin 161 to abut against the circuit board 600 and continue to move downward to bend the circuit board 600. During this process, the image captured by the camera 300 is transmitted to the monitoring device 200 and displayed. When the circuit board 600 is bent to a certain extent, the plurality of electronic components or the internal circuit of the circuit board 600 are broken, so that the image signal captured by the camera 300 cannot be transmitted to the monitoring device 200 by the signal output component 400, that is, the monitoring The image of device 200 disappears and the board 600 fails, see Figure 3. The value of the spiral micrometer 160 is recorded at this time, and the difference between the two values is calculated to obtain the displacement amount of the measuring screw 162. Then, by comparing the displacement and the angle value obtained by the test, the bending angle of the board 600 when it fails can be obtained.

It can be understood that the detecting device 900 can also omit the camera 300 and the signal output component 400, and only need to replace the computer of the monitoring device 200 with an oscilloscope or the like. The oscilloscope is connected to the circuit board and tests the signal waveform of the circuit board. If the displayed waveform is different from the waveform under normal conditions or has no waveform display, the circuit board is damaged.

It will be appreciated that the cantilever frame 140 can be replaced with other positioning elements having guide rails to adjust the fixed position of the helical micrometer 160.

It can be understood that the support body 180 and the fixing portion 182 can be replaced by a holding mechanism for fixing the circuit board 600.

In summary, the present invention complies with the requirements of the invention patent and submits a patent application according to law. However, the above description is only a preferred embodiment of the present invention, and the scope of the present invention is not limited to the above-described embodiments, and equivalent modifications or variations made by those skilled in the art in accordance with the spirit of the present invention are It should be covered by the following patent application.

100‧‧‧Measurement device

120‧‧‧Base

140‧‧‧cantilever

142‧‧‧ column

144‧‧‧Cantilever beam

160‧‧‧Spiral micrometer

170‧‧‧ Slider

172‧‧‧Sliding section

1722‧‧‧Chute

174‧‧‧ Department of Maintenance

176‧‧‧Bolts

180‧‧‧Support

182‧‧‧ fixed department

200‧‧‧Monitor

300‧‧‧Webcam

400‧‧‧Signal output components

600‧‧‧ boards

606‧‧‧ hole

608‧‧‧ hole

900‧‧‧Testing equipment

Claims (7)

A detecting device for detecting whether a circuit board is ineffective, comprising: a measuring device comprising a base, a positioning component, a spiral micrometer and a holding mechanism, wherein the positioning component is fixed on the base The positioning component has a holding portion, a through hole is formed in the surface of the holding portion, and the spiral micrometer is movably connected to the through hole. The spiral micrometer includes a top needle and a measuring screw, and the top a needle fixedly connected to one end of the measuring screw for resisting one end of the circuit board, the holding mechanism being disposed on the base for holding the other end of the circuit board; and a monitoring device and the circuit The board is electrically connected to determine whether the circuit board is invalid. The detecting device of claim 1, wherein the positioning component comprises a cantilever frame and a slider, and the slider is sleeved on the cantilever frame. The detecting device of claim 2, wherein the cantilever frame comprises a column and a cantilever beam, and the cantilever beam is formed by extending one end of the column in a direction perpendicular to the column. The detecting device of claim 3, wherein the slider comprises a sliding portion that is sleeved on a cantilever beam of the cantilever frame, and the holding portion is fixed to one side of the sliding portion. The detecting device of claim 1, wherein the holding mechanism is a supporting body, and a fixing portion is disposed on one end surface thereof, and a screw hole is arranged in the fixing portion, and a screw is screwed into the threaded hole. . The detecting device of claim 1, wherein the detecting device further comprises a camera disposed on the circuit board and a signal output component, wherein the camera is configured to capture an image and output the component by the signal Transfer to the monitoring device. The detecting device of claim 6, wherein the monitoring device is a computer or a display Waves.