CN214794237U - Bending resistance testing device for circuit board - Google Patents
Bending resistance testing device for circuit board Download PDFInfo
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- CN214794237U CN214794237U CN202121384926.7U CN202121384926U CN214794237U CN 214794237 U CN214794237 U CN 214794237U CN 202121384926 U CN202121384926 U CN 202121384926U CN 214794237 U CN214794237 U CN 214794237U
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- circuit board
- screw rod
- pressure sensor
- bending resistance
- pressure
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Abstract
The utility model relates to a bending resistance testing device of a circuit board, which is used for testing the bending resistance of the circuit board and comprises a pressure applying device, a driving device and a circuit board placing device, wherein the pressure applying device comprises a screw rod, a fixing frame, a pressure sensor, a pressing block and a linear motion control mechanism; the upper end of the screw rod is connected with the driving device, and the lower end of the screw rod is connected with the upper part of the fixing frame; the upper part of the pressure sensor is fixed on the lower part of the fixed frame, and the lower part of the pressure sensor is connected with the pressure applying block; the linear motion control mechanism is connected with the fixed frame; the circuit board placing device is positioned below the pressurizing block and used for providing support for two ends of the circuit board; the pressure applying block is used for applying pressure to the middle part of the circuit board. The utility model discloses accurate circuit board bending resistance test can be accomplished.
Description
Technical Field
The utility model relates to a circuit board technical field, more specifically relates to a circuit board bending resistance testing arrangement.
Background
The reliability test of the circuit board comprises low-temperature storage test, board explosion test, bending resistance test and the like, and the reliability test requires that the circuit board has no or limited damage, cracking, delamination, discoloration, via hole open circuit, deformation and the like, thereby ensuring the product quality of the circuit board. In the bending resistance test process of the circuit board, special requirements are provided for pressure application pressure, pressure application time and pressure application stroke, and the circuit board is used as a small component and is very sensitive to the problems of eccentric pressure application, torsion and the like in the pressure application process, so that the conventional bending resistance test device cannot well meet the bending resistance test requirements of the circuit board.
SUMMERY OF THE UTILITY MODEL
The utility model discloses aim at overcoming above-mentioned prior art's at least one defect (not enough), provide a circuit board bending resistance testing arrangement for accomplish accurate circuit board bending resistance test.
The utility model adopts the technical proposal that:
a bending resistance testing device of a circuit board is used for testing the bending resistance of the circuit board and comprises a pressure applying device, a driving device and a circuit board placing device, wherein the pressure applying device comprises a screw rod, a fixing frame, a pressure sensor, a pressing block and a linear motion control mechanism;
the upper end of the screw rod is connected with the driving device, and the lower end of the screw rod is connected with the upper part of the fixing frame; the upper part of the pressure sensor is fixed on the lower part of the fixed frame, and the lower part of the pressure sensor is connected with the pressure applying block; the linear motion control mechanism is connected with the fixed frame;
the circuit board placing device is positioned below the pressurizing block and used for providing support for two ends of the circuit board; the pressure applying block is used for applying pressure to the middle part of the circuit board.
In the bending resistance test process of the circuit board, the driving device drives the screw rod to descend, the screw rod drives the pressure sensor and the pressing block to descend through the fixing frame, the circuit board placed below the pressing block is pressed, in the descending pressing process, the fixing frame is guaranteed to accurately and strictly move vertically and vertically through the linear motion control mechanism, and therefore the pressing block is guaranteed to apply strictly and accurately downward pressure to the circuit board, and the accuracy of the bending resistance test of the circuit board is improved.
Further, the linear motion control mechanism comprises a linear bearing seat and a bearing, one end of the bearing penetrates through the linear bearing seat, and the other end of the bearing is connected with the fixing frame.
The linear bearing seat can limit the bearing to accurately and strictly vertically move up and down, so that the fixing frame connected with the bearing is ensured to accurately and strictly vertically move up and down.
Furthermore, the number of the linear motion control mechanisms is two, and the two linear motion control mechanisms are respectively positioned at the left end and the right end of the fixing frame.
The linear motion control mechanisms positioned at the left end and the right end of the fixing frame can limit the fixing frame from twisting in the up-and-down motion process to influence the accuracy of the bending resistance test of the circuit board.
Further, the pressure applying device further comprises a screw rod, the lower portion of the pressure sensor is connected with the pressure applying block through the screw rod, the screw rod is provided with a nut, and the nut locks the pressure sensor.
The cooperation of screw rod and nut can lock pressure sensor for can not taking place vibrations in the course of the work as the pressure sensor of high sensitivity.
Furthermore, the fixing frame comprises an upper cross beam, a lower cross beam and a connecting piece, the upper end of the connecting piece is connected with the upper cross beam, the lower end of the connecting piece is connected with the lower cross beam, the lower end of the screw rod is connected with the upper cross beam, and the upper part of the pressure sensor is fixed on the lower cross beam.
The upper cross beam and the lower cross beam are arranged to facilitate installation of the screw rod and the pressure sensor respectively, and the upper cross beam and the lower cross beam can be connected through the connecting piece, so that the upper cross beam, the lower cross beam and the connecting piece form a whole together.
Furthermore, the circuit board placing device comprises two positioning plates and two placing plates, wherein the two positioning plates are vertically arranged below the pressurizing block relatively, the two placing plates are vertically arranged between the two positioning plates relatively, the positioning plate positioned on the left side is tightly attached to the placing plate positioned on the left side, and the positioning plate positioned on the right side is tightly attached to the placing plate positioned on the right side.
The locating plate can play the effect of location when placing the circuit board, prevents that the circuit board from putting partially and leading to the eccentric pressurized of circuit board in bending resistance test process. The placing plate can provide two-end support for the circuit board, and under the condition that the pressing block presses the middle part of the circuit board and the placing plate supports the two ends of the circuit board, the circuit board is bent under the condition of three-point stress.
Further, drive arrangement is including step motor, step driver and the controller of electricity connection in proper order, the one end of lead screw with step motor is connected.
The controller can control the stepping driver to drive the stepping motor to rotate a certain angle accurately within the preset time, so that the lead screw is controlled to descend accurately within the preset time by a preset distance, and the pressure applying time and the pressure applying stroke required by the bending resistance test of the circuit board are met.
Further, the controller comprises a PLC and an analog-to-digital converter which are connected in sequence, and the analog-to-digital converter is connected with the stepping driver.
A PLC (Programmable Logic Controller) may send a digital signal, the digital signal is converted into an analog signal by an analog-to-digital converter, and the analog signal controls a step driver driving motor to precisely rotate a certain angle within a preset time. The PLC and the analog-to-digital converter are adopted, so that the controller can complete a logic control function, and the controller is simple in structure and low in cost.
Further, the testing device further comprises a display screen, and the pressure sensor and/or the driving device are electrically connected with the display screen.
The display screen can show the pressure that pressure sensor detected, can also show drive arrangement's drive condition, makes things convenient for tester control circuit board bending resistance test.
Furthermore, the testing device also comprises a shell, a cavity is formed in the shell, the driving device is placed in the cavity, and the upper end of the screw rod penetrates through the cavity wall of the cavity and is connected with the driving device; and a supporting piece extends out of the shell below the cavity and is connected with the circuit board placing device.
The driving device is placed in the cavity formed in the shell, so that the dustproof protection effect can be achieved. The supporting piece extending from the lower part of the accommodating cavity can enable the driving device, the pressure applying device and the circuit board placing device to form a whole, and the whole taking, placing and transporting are convenient. Moreover, the supporting piece can enable the whole circuit board bending resistance testing device to be stably placed on the plane, and the stable placement of the whole device in the circuit board bending resistance testing process is guaranteed.
Compared with the prior art, the beneficial effects of the utility model are that:
(1) in the bending resistance test process of the circuit board, the pressure block can strictly and accurately apply pressure to the circuit board vertically and downwards;
(2) the fixed frame can not be twisted to cause the circuit board to bear the eccentric pressure of the pressure applying block;
(3) the pressing block can be accurately and conveniently controlled to descend for a preset distance within preset time so as to meet the pressing time requirement and the pressing stroke requirement of the bending resistance test of the circuit board.
Drawings
Fig. 1 is a first perspective view of an embodiment of the present invention.
Fig. 2 is a second perspective view of the embodiment of the present invention.
Fig. 3 is an enlarged view of the fixing frame according to the embodiment of the present invention.
Fig. 4 is a third perspective view of the embodiment of the present invention.
Reference numerals: 11-a screw rod; 12-a fixing frame; 121-upper beam; 122-a lower beam; 123-connecting piece; 13-a pressure sensor; 14-pressing the block; 151-linear bearing seat; 152-a bearing; 161-screw rod; 162-a nut; 21-positioning plate; 22-placing the plate; 23-a connecting plate; 31-a stepper motor; 32-step driver; 33-a controller; 40-a housing; 41-a cavity; 42-a support member; 51-a display screen; 52-control keys; 61-a power supply; 62-electrically connecting the traces.
Detailed Description
The drawings of the present invention are for illustration purposes only and are not to be construed as limiting the invention. For a better understanding of the following embodiments, certain features of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.
As shown in fig. 1 and fig. 2, the present embodiment provides a bending resistance testing apparatus for a circuit board, which includes a pressure applying device, a driving device and a circuit board placing device.
The pressure applying device comprises a screw rod 11, a fixing frame 12, a pressure sensor 13, a pressure applying block 14 and a linear motion control mechanism. The upper end of the screw rod 11 is connected with a driving device, and the lower end of the screw rod 11 is connected with the upper part of the fixed frame 12; the upper part of the pressure sensor 13 is fixed on the lower part of the fixed frame 12, and the lower part of the pressure sensor 13 is connected with the pressurizing block 14; the linear motion control mechanism is connected with the fixed frame 12.
The circuit board placing device is positioned below the pressing block 14 and is used for providing support for two ends of the circuit board; the pressing block 14 serves to press the middle portion of the circuit board.
In the pressure applying device, the screw rod 11 is a mechanism for converting rotary motion into linear motion, the driving device outputs rotary power, the screw rod 11 converts the rotary power output by the driving device into linear motion power, so as to drive the fixing frame 12 to do linear motion up and down, and the fixing frame 12 then drives the pressure sensor 13 and the pressurizing block 14 to do linear motion up and down.
The process of performing the bending resistance test of the circuit board by using the bending resistance test device of the circuit board provided by the embodiment can be as follows: the circuit board is placed on the circuit board placing device, two ends of the circuit board are supported by the circuit board placing device, the driving device drives the fixing frame 12 through the screw rod 11, the fixing frame 12 drives the pressure sensor 13 and the pressing block 14 to descend for a preset distance in preset time, the pressing block 14 presses the middle portion of the circuit board placed below the fixing frame in the circuit board placing device according to the preset time and the preset distance, the circuit board can be bent under three-point stress formed by supporting the two ends and pressing the middle portion, therefore, the bending resistance of the circuit board can be tested, and the pressing pressure can be read in real time through the pressure sensor 13 in the bending resistance test of the circuit board.
After the bending resistance test of the circuit board is finished, the screw rod 11 can be adjusted, so that the screw rod 11 drives the fixing frame 12, the fixing frame 12 then drives the pressure sensor 13 and the pressing block 14 to rise for a certain distance, and thus, the pressing of the pressing block 14 on the circuit board is released, and the circuit board is taken away from the circuit placing device.
The linear motion control device can ensure that the fixing frame 12, the pressure sensor 13 and the pressurizing block 14 can move along the straight line more accurately, avoid the situation that the circuit board is twisted due to the eccentric pressure in the bending resistance test process of the circuit board, and avoid the influence on the accuracy of the bending resistance test.
The linear motion control mechanism may include a linear bearing housing 151 and a bearing 152, one end of the bearing 152 penetrates the linear bearing housing 151, and the other end of the bearing 152 is connected to the fixed frame 12.
Under the constraint of the linear bearing seat 151, the bearing 152 moves strictly linearly up and down, and the fixed frame 12 connected with the bearing 152 moves strictly linearly up and down due to the driving of the bearing 152.
The number of the linear motion control mechanisms may be plural, and preferably two linear motion control mechanisms are provided, and the two linear motion control mechanisms are respectively provided at the left and right ends of the fixing frame 12.
The two linear motion control mechanisms respectively act on the left end and the right end of the fixed frame 12 at the same time, so that the whole fixed frame 12 can be controlled to keep linear up-and-down motion without the problem of asynchronous twisting of the motion of the left end and the right end of the fixed frame 12.
The pressure applying device may further include a screw 161, a lower portion of the pressure sensor 13 is connected to the pressure applying block 14 through the screw 161, the screw 161 is provided with a nut 162, and the nut 162 locks the pressure sensor 13.
The pressure sensor 13 is a high-sensitivity instrument, the upper part of the pressure sensor 13 can stably detect the pressure applied by the pressure applying block 14 to the circuit board under the fixation of the fixing frame 12, the lower part of the pressure sensor 13 is connected with one end of a screw rod 161, so that the nut 162 on the screw rod 161 can lock the pressure sensor 13, the stability of the pressure sensor 13 when detecting the pressure is further improved, and the pressure applying block 14 is connected with the other end of the screw rod 161, and transmits the pressure applied to the circuit board to the pressure sensor 13 through the screw rod 161.
As shown in fig. 3, in the pressure applying apparatus, the fixing frame 12 may include an upper beam 121, a lower beam 122, and a connecting member 123, an upper end of the connecting member 123 is connected to the upper beam 121, a lower end of the connecting member 123 is connected to the lower beam 122, a lower end of the lead screw 11 is connected to the upper beam 121, and an upper portion of the pressure sensor 13 is fixed to the lower beam 122.
The upper beam 121 is arranged to conveniently connect the fixing frame 12 with the screw rod 11. Specifically, the upper beam 121 may be provided with a screw hole matched with the screw thread of the screw rod 11, and the lower end of the screw rod 11 extends into the screw hole, so that the screw thread of the lower end of the screw rod 11 is matched with the screw hole to form a fixed connection.
The lower beam 122 is also arranged to conveniently realize the connection between the fixed frame 12 and the pressure sensor 13. Specifically, the lower cross member 122 is provided with a mounting hole, and the pressure sensor 13 is mounted on the lower cross member 122 through the mounting hole.
Preferably, the number of the connecting members 123 is two, and the upper beam 121, the lower beam 122 and the two connecting members 123 may form a stable four-square frame, so that the fixing frame 12 has sufficient strength when driven by the screw rod 11 and the pressure sensor 13 and the pressurizing block 14.
The circuit board placement device may include two positioning plates 21 and two placement plates 22, the two positioning plates 21 are vertically disposed below the pressing block 14, the two placement plates 22 are vertically disposed between the two positioning plates 21, the positioning plate 21 located on the left side is closely attached to the placement plate 22 located on the left side, and the positioning plate 21 located on the right side is closely attached to the placement plate 22 located on the right side.
The two positioning plates 21 can position the circuit board so that the middle portion of the circuit board is aligned with the pressuring block 14. Two resting plates 22 may provide two-end support for the circuit board.
As shown in fig. 4, the driving means may include a stepping motor 31, a stepping driver 32, and a controller 33 electrically connected in sequence, and one end of the lead screw 11 is connected to the stepping motor 31.
The controller 33 sends a control signal to the step driver 32 to control the step driver 32 to drive the motor to drive the pressing block 14 to descend for a preset distance (1mm) within a preset time (1s time) according to the pressing time and the pressing stroke required by the bending resistance test of the circuit board, for example, the pressing block 14 is required to descend for 1mm within 1s time. Specifically, the motor drives the screw rod 11 to descend, the screw rod 11 drives the fixing frame 12 to descend, the fixing frame 12 drives the pressure sensor 13 to descend, and finally the pressure sensor 13 drives the pressurizing block 14 to descend through the screw 161.
In one embodiment, the controller 33 may comprise a PLC and an analog-to-digital converter connected in series, and the analog-to-digital converter is connected to the step driver 32.
The PLC generates a digital signal according to the pressing time and the pressing stroke required by the bending resistance test of the circuit board and sends the digital signal to the analog-to-digital converter. The pressure application time and pressure application stroke required by the bending resistance test of the circuit board can be programmed into the PLC by a tester before the test, and after the analog-to-digital converter receives the digital signal sent by the PLC, the received digital signal is converted into an analog signal (i.e. an electric pulse signal) and sent to the step driver 32. After receiving the analog signal sent by the analog-to-digital converter, the step driver 32 drives the step motor 31 to rotate by a certain angle in a set direction according to the analog signal. The screw rod 11 capable of converting the rotary motion into the linear motion can convert the rotation of the stepping motor 31 into the self up-and-down linear motion.
The testing device may further comprise a display screen 51, the pressure sensor 13 and/or the driving device being electrically connected to the display screen 51. The pressure sensor 13 may display the detected pressure on the display screen 51. The driving condition of the driving device can also be displayed on the display screen 51, for example, how long the driver sends out a digital signal, and the pressing time and the pressing stroke required by the bending resistance test of the current circuit board can also be displayed.
As shown in fig. 1, 2 and 4, the testing device may further include a housing 40, a cavity 41 is formed inside the housing 40, the driving device is placed in the cavity 41, and the upper end of the lead screw 11 passes through the cavity wall of the cavity 41 and is connected to the driving device; the housing 40 extends below the cavity 41 with a support member 42, and the support member 42 is connected to the circuit board placement device.
The driving device is placed in a cavity 41 formed in the housing 40, and can play a role in dust protection. The supporting member 42 extending from the lower portion of the cavity 41 can enable the driving device, the pressure applying device and the circuit board placing device to be integrated, so that the integrated taking, placing and transporting are facilitated. Moreover, the supporting member 42 can stably place the whole device for testing bending resistance of circuit board on a plane, so as to ensure the stable placement of the whole device in the process of testing bending resistance of circuit board.
As shown in fig. 1 to 4, in a preferred embodiment, the bending resistance testing apparatus for circuit board includes a pressure applying device, a driving device and a circuit board placing device. The pressure applying device comprises a screw rod 11, a fixing frame 12, a pressure sensor 13, a pressure applying block 14 and a linear motion control mechanism; the linear motion control mechanism includes two linear bearing seats 151 and two bearings 152, and the fixing frame 12 includes an upper beam 121, a lower beam 122 and two connecting members 123. The driving device comprises a stepping motor 31, a stepping driver 32 and a controller 33 which are electrically connected in sequence; the controller 33 includes a PLC and an analog-to-digital converter, which are connected in sequence. The circuit board placement device includes two positioning plates 21 and two placement plates 22. The PLC, the analog-to-digital converter, the step driver 32 and the step motor 31 are disposed in a cavity 41 formed inside the housing 40.
The upper end of the screw rod 11 passes through the cavity wall of the containing cavity 41 to be connected with the stepping motor 31, and the lower end of the screw rod 11 extends into a screw hole formed in the upper cross beam 121 of the fixing frame 12, so that the screw thread of the lower section of the screw rod 11 is matched with the screw hole to realize the fixed connection of the lower end of the screw rod 11 and the upper cross beam 121; the upper part of the pressure sensor 13 is mounted in a mounting hole formed in the lower cross beam 122 of the fixing frame 12, so that the upper part of the pressure sensor 13 is fixedly connected with the lower cross beam 122. The two connecting pieces 123 are respectively connected between the upper beam 121 and the lower beam 122, and the upper beam 121, the lower beam 122 and the two connecting pieces 123 form a stable four-square frame.
The lower part of the pressure sensor 13 is connected with the pressurizing block 14 through a screw 161, a nut 162 is arranged on the screw 161, and the nut 162 and the screw 161 are matched with each other to lock the pressure sensor 13.
One bearing 152 corresponds to each linear bearing seat 151, the upper end of the bearing 152 penetrates through the corresponding linear bearing seat 151, and the lower end of the bearing 152 is connected with the upper cross beam 121 of the fixed frame 12. The lower ends of the two bearings 152 are connected to the left and right ends of the upper cross member 121, respectively.
Two locating plates 21 and two placing plates 22 are respectively located below the pressing block 14, the two locating plates 21 are vertically arranged below the pressing block 14 left and right relatively, the two placing plates 22 are vertically arranged between the two locating plates 21 left and right relatively, the locating plate 21 located on the left side is attached to the placing plate 22 located on the left side, and the locating plate 21 located on the right side is attached to the placing plate 22 located on the right side.
The bending resistance test apparatus for circuit board further includes a housing 40. Two supporting members 42 extend from the housing 40 below the receiving cavity 41, and the two supporting members 42 are connected to the positioning plate 21 and the placing plate 22 through a connecting plate 23. The positioning plate 21 and the placing plate 22 are disposed on the connecting plate 23, one end of the connecting plate 23 is connected to one of the supporting members 42, and the other end of the connecting plate 23 is connected to the other supporting member 42.
The PLC, the analog-to-digital converter, the step driver 32, and the step motor 31 are electrically connected in sequence. The PLC generates a digital signal according to the pressure application time and the pressure application stroke required by the bending resistance test of the circuit board and sends the digital signal to the analog-to-digital converter; the analog-to-digital converter converts the received digital signal into an analog signal and sends the analog signal to the step driver 32; the stepping driver 32 drives the stepping motor 31 to rotate according to the received analog signal; the screw rod 11 converts the rotation of the stepping motor 31 into the up-and-down linear motion to drive the fixing frame 12 to move up-and-down linearly. The fixing frame 12 performs precise vertical linear motion under the limitation of the two bearings 152 and the two linear bearing seats 151, and drives the pressure sensor 13 and the pressurizing block 14 to perform precise vertical linear motion.
The bending resistance test device of the circuit board further comprises a display screen 51. A display screen 51 is provided on the front of the housing 40, the pressure sensor 13 and/or the driving device is electrically connected to the display screen 51, and the pressure sensor 13 can display the detected pressure on the display screen 51. The driving condition of the driving device can also be displayed on the display screen 51, for example, how long the driver sends out a digital signal, and the pressing time and the pressing stroke required by the bending resistance test of the current circuit board can also be displayed.
A control key 52 can be arranged beside the display screen 51 and is used for receiving the control of a tester to program the pressing time and the pressing stroke required by the bending resistance test of the circuit board into the PLC, and also used for receiving the control of the tester to control the start, pause and end of the bending resistance test of the circuit board.
The power source 61 for supplying power to the controller 33, the step driver 32, the step motor 31, the pressure sensor 13, and the display screen 51, respectively, may also be disposed in a cavity formed inside the housing 40. Electrical connection traces 62 between the pressure sensor 13 and the power source 61 and/or between the pressure sensor 13 and the display screen 51 may be routed to the rear of the housing 40 and extend from the rear of the housing 40 into the cavity 41 formed within the housing 40.
The specific process of the bending resistance test of the circuit board by adopting the preferred embodiment can be as follows: before the bending-resistant test of the circuit board, the tester operates the control key 52 to program the pressing time and the pressing stroke required by the bending-resistant test of the circuit board as a PLC, and the circuit board to be tested is stably placed on the placing plate 22 under the positioning action of the positioning plate 21. The bending resistance test of the circuit board is started, the PLC generates a digital signal according to the pressing time and the pressing stroke required by the bending resistance test of the circuit board, the digital signal is converted into an analog signal by the analog-to-digital converter, the stepping driver 32 drives the motor to rotate for a certain angle in a certain time according to the analog signal so as to drive the screw rod 11 to decrease the required pressing distance in the required pressing time, and then the screw rod 11 drives the pressure sensor 13 and the pressing block 14 to decrease the required pressing distance in the required pressing time through the fixing frame 12. The pressing block 14 presses the middle portion of the circuit board to be tested by a required pressing distance after a required pressing time is reduced, so that the circuit board to be tested is pressed by the pressing block 14 in the middle portion and is supported by the placing plate 22 at both ends to form three-point stress and be bent. After the circuit board is subjected to bending, the circuit board is observed whether the circuit board has breakage, cracking, delamination, discoloration, via opening, deformation and the like, so as to evaluate the bending resistance of the circuit board.
It is obvious that the above embodiments of the present invention are only examples for clearly illustrating the technical solutions of the present invention, and are not limitations to the specific embodiments of the present invention. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.
Claims (10)
1. A bending resistance testing device of a circuit board is used for testing the bending resistance of the circuit board and is characterized by comprising a pressure applying device, a driving device and a circuit board placing device, wherein the pressure applying device comprises a screw rod, a fixing frame, a pressure sensor, a pressure applying block and a linear motion control mechanism;
the upper end of the screw rod is connected with the driving device, and the lower end of the screw rod is connected with the upper part of the fixing frame; the upper part of the pressure sensor is fixed on the lower part of the fixed frame, and the lower part of the pressure sensor is connected with the pressure applying block; the linear motion control mechanism is connected with the fixed frame;
the circuit board placing device is positioned below the pressurizing block and used for providing support for two ends of the circuit board; the pressure applying block is used for applying pressure to the middle part of the circuit board.
2. The device of claim 1, wherein the linear motion control mechanism comprises a linear bearing seat and a bearing, one end of the bearing penetrates through the linear bearing seat, and the other end of the bearing is connected to the fixing frame.
3. The apparatus of claim 1, wherein the number of the linear motion control mechanisms is two, and the two linear motion control mechanisms are respectively located at the left and right ends of the fixing frame.
4. The device for testing bending resistance of circuit board according to claim 1, wherein the pressure applying device further comprises a screw rod, the lower portion of the pressure sensor is connected to the pressure applying block through the screw rod, the screw rod is provided with a nut, and the nut locks the pressure sensor.
5. The apparatus of claim 1, wherein the fixing frame comprises an upper beam, a lower beam and a connecting member, the upper end of the connecting member is connected to the upper beam, the lower end of the connecting member is connected to the lower beam, the lower end of the lead screw is connected to the upper beam, and the upper portion of the pressure sensor is fixed to the lower beam.
6. The device for testing bending resistance of circuit board according to claim 1, wherein the device for placing circuit board comprises two positioning plates and two placing plates, the two positioning plates are vertically arranged below the pressing block, the two placing plates are vertically arranged between the two positioning plates, the positioning plate on the left side is closely attached to the placing plate on the left side, and the positioning plate on the right side is closely attached to the placing plate on the right side.
7. The apparatus of claim 1, wherein the driving device comprises a stepping motor, a stepping driver and a controller electrically connected in sequence, and one end of the lead screw is connected to the stepping motor.
8. The apparatus of claim 7, wherein the controller comprises a PLC and an analog-to-digital converter connected in sequence, the analog-to-digital converter is connected to the step driver.
9. The device of claim 1, further comprising a display screen, wherein the pressure sensor and/or the driving device are electrically connected to the display screen.
10. The device for testing the bending resistance of the circuit board according to any one of claims 1 to 9, further comprising a housing, wherein a cavity is formed inside the housing, the driving device is placed in the cavity, and the upper end of the screw rod penetrates through the cavity wall of the cavity and is connected with the driving device; and a supporting piece extends out of the shell below the cavity and is connected with the circuit board placing device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121384926.7U CN214794237U (en) | 2021-06-21 | 2021-06-21 | Bending resistance testing device for circuit board |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121384926.7U CN214794237U (en) | 2021-06-21 | 2021-06-21 | Bending resistance testing device for circuit board |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214794237U true CN214794237U (en) | 2021-11-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121384926.7U Active CN214794237U (en) | 2021-06-21 | 2021-06-21 | Bending resistance testing device for circuit board |
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|---|---|
| CN (1) | CN214794237U (en) |
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2021
- 2021-06-21 CN CN202121384926.7U patent/CN214794237U/en active Active
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