A MLCC bending strength test device

Abstract

The present invention relates to the technical field of bending strength testing, and in particular to an MLCC bending strength testing device, comprising a base, a supporting structure, a pressurizing structure and a linear moving mechanism; the supporting structure is arranged in the middle of the base, and the supporting structure is used to horizontally place a PCB board welded with MLCC; the pressurizing structure comprises a hanging structure, a pressurizing rod, a second driving plate and a first driving structure, there are a plurality of pressurizing rods, and the lengths of the plurality of pressurizing rods are different, and the plurality of pressurizing rods are hung on the hanging structure at equal intervals, the second driving plate is connected to the plurality of pressurizing rods, and the force of the first driving structure is simultaneously transmitted to the plurality of pressurizing rods through the second driving plate; the linear moving mechanism is used to drive the pressurizing structure to move along the base; the present invention is provided with a plurality of pressurizing rods of different lengths and a linear moving mechanism, so that stable bending forces of different sizes are sequentially applied to the PCB board, so as to achieve accurate control of the bending depth of the PCB board, thereby improving the accuracy of detecting the bending strength of MLCC.

Description

Technical Field

[0001] The present invention relates to the technical field of bending strength testing, and in particular to a MLCC bending strength testing device. Background Art

[0002] MLCC, the full name of which is Multi-Layer Ceramic Capacitor, is a multilayer ceramic capacitor. It is made of ceramic powder, with layers in structure, internal electrodes alternately stacked, and sintered at high temperature to form a capacitor. It has the advantages of small size, large specific capacitance, low loss, high insulation, and good frequency characteristics. MLCC is widely used in bypass, coupling, filtering, oscillation and other circuits of integrated circuits, and is one of the most used components in electronic products.

[0003] Patent application CN202211578327.8 describes a bending strength test fixture and test method for chip capacitors, and its working principle is as follows: S1, connect the first lead and the second lead to a capacitor parameter tester, and calibrate the capacitor parameter tester; S2, respectively weld the two solder joints of the chip capacitor to be tested on the first pad and the second pad of the PCB board; S3, place the chip capacitor on the PCB board downward on the PCB board fixed structure; S4, test the chip capacitor to be tested; if the test result meets the requirements, execute step S5, otherwise, the chip capacitor to be tested is judged to be unqualified; S5, adjust the support position of the support assembly; S6, rotate the pressure bolt so that the lower end of the pressure bolt abuts against the PCB board, and bend the PCB board downward by a predetermined distance; S7, test the chip capacitor again and compare it with the test result in step S4. If the range of change of the test result meets the requirements, the chip capacitor to be tested is judged to be qualified, otherwise, the chip capacitor to be tested is judged to be unqualified.

[0004] The above solution still has the following problems:

[0005] 1. The above scheme controls the bending depth of the PCB board by rotating the pressure bolt. Each time the bending depth of the PCB board is adjusted, the pressure bolt needs to be accurately adjusted. If the pressure bolt is rotated too much or too little, it will affect the test results of the MLCC;

[0006] 2. In the above scheme, only one MLCC can be tested at a time, and the test efficiency is low. Summary of the invention

[0007] In view of the above problems, an MLCC bending strength testing device is provided. The present invention provides a plurality of pressure rods of different lengths and a linear moving mechanism, so that stable bending forces of different sizes are applied to the PCB board in sequence, thereby achieving precise control of the bending depth of the PCB board, thereby improving the accuracy of detecting the bending strength of the MLCC.

[0008] In order to solve the problems of the prior art, the present invention provides an MLCC bending strength testing device, comprising a base, which is horizontally arranged, and also comprises a supporting structure, a pressurizing structure and a linear moving mechanism; the supporting structure is arranged in the middle of the base, and the supporting structure is used to horizontally place a PCB board welded with MLCC, and the PCB board is connected to a capacitance parameter tester; the pressurizing structure comprises a hanging structure, a pressurizing rod, a second driving plate and a first driving structure, the hanging structure is horizontally arranged above the base, there are a plurality of pressurizing rods, and the lengths of the plurality of pressurizing rods are different, and the plurality of pressurizing rods are hung on the hanging structure at equal intervals, the second driving plate is connected to the plurality of pressurizing rods, the first driving structure is arranged at one end of the second driving plate, and the action force of the first driving structure is simultaneously transmitted to the plurality of pressurizing rods through the second driving plate; the linear moving mechanism is arranged above the pressurizing structure, and the linear moving mechanism is used to drive the pressurizing structure to move along the base.

[0009] Preferably, there are a plurality of supporting structures, and the plurality of supporting structures are arranged on the base at equal intervals.

[0010] Preferably, the lifting structure includes a lifting cross bar and a first fixed connecting seat; the lifting cross bar is horizontally arranged at the upper end of the base, and the lifting cross bar is arranged along the supporting structure arranged at equal intervals; there are a plurality of first fixed connecting seats, and the plurality of first fixed connecting seats are fixed on the lifting cross bar at equal intervals, and the distance between two adjacent first fixed connecting seats is the same as the distance between two adjacent supporting structures, and the lower end of the first fixed connecting seat is hinged with a connecting sleeve.

[0011] Preferably, the first driving structure includes a first linear driver and a sliding connection structure; the first linear driver is arranged at one end of the lifting cross bar; the sliding connection structure is arranged on the lifting cross bar, and the sliding connection structure connects the first linear driver to the second driving plate.

[0012] Preferably, the pressurizing structure also includes a fixed structure, which is arranged at the other end of the second driving plate, and the fixed structure includes a second fixed connecting seat, a hanging plate, a third connecting plate, a clamping assembly and a second driving structure; the second fixed connecting seat is arranged at the other end of the hanging cross bar, and the second fixed connecting seat is fixedly connected to the hanging cross bar; the hanging plate is arranged at the lower end of the second fixed connecting seat; the middle part of the third connecting plate is connected to one end of the second driving plate, and both ends of the third connecting plate are provided with clamping grooves; there are two clamping assemblies, and the two clamping assemblies are respectively arranged at the two ends of the hanging plate; the second driving structure is arranged between the two clamping assemblies.

[0013] Preferably, the support structure includes a support plate, a horizontal support assembly and a center assembly; the support plate is fixed on the base; there are two horizontal support assemblies, which are respectively arranged at both ends of the support plate; there are two center assemblies, which are respectively arranged at both ends of the support plate.

[0014] Preferably, the centering component includes an abutment plate, a first guide column and a first spring; the abutment plate is arranged at one end of the support plate, and limiting plates are arranged at both ends of the abutment plate; there are several first guide columns, and one end of the first guide column passes through one end of the support plate and is connected to the abutment plate; the first spring is sleeved on the first guide column, and the two ends of the first spring are respectively abutted against the abutment plate and the support plate.

[0015] Preferably, the centering component further comprises a sleeve, and an internal thread is formed inside the sleeve.

[0016] Preferably, the supporting structure further includes a limiting structure, and the limiting structure is arranged in the middle of the supporting plate.

[0017] Preferably, the linear moving mechanism includes a fifth connecting plate, a third fixed connecting seat and a third driving structure; the fifth connecting plate is arranged above the lifting cross bar; there are two third fixed connecting seats, and the two third fixed connecting seats are respectively arranged at the two ends of the fifth connecting plate, and the two ends of the third fixed connecting seat are respectively connected to the fifth connecting plate and the lifting cross bar; the third driving structure is arranged at the upper end of the fifth connecting plate.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] 1. The present invention provides a plurality of pressure rods of different lengths and a linear moving mechanism. The plurality of pressure rods of different lengths correspond to different bending depths of MLCC respectively. The linear moving mechanism moves the first pressure rod corresponding to the bending depth of MLCC to the middle of the PCB board. The first driving structure drives the first pressure rod to move. The first pressure rod applies a downward stable bending force to the middle of the PCB board. The middle of the PCB board bends downward. After the PCB board is bent for a certain period of time, the bending depth of the PCB board needs to be changed. The first driving structure drives the first pressure rod away from the PCB board. The linear moving mechanism then moves the second pressure rod to the middle of the PCB board. The first driving structure drives the second pressure rod to apply a downward stable bending force to the PCB board. The bending depth of the PCB board changes. By repeating the above steps, the PCB board can be bent to different bending depths, so that stable bending forces of different sizes are applied to the PCB board in turn, and the bending depth of the PCB board is accurately controlled, thereby improving the accuracy of detecting the bending strength of MLCC.

[0020] 2. The present invention sets up several supporting structures, and multiple PCB boards welded with MLCC are placed on multiple adjacent supporting structures in turn. The linear moving mechanism moves the first pressure rod to the middle of the first PCB board. The first pressure rod applies a downward stable bending force to the first PCB board under the action of the first driving structure. Then the linear moving mechanism drives the first pressure rod to move to the middle of the second PCB board. At this time, the second pressure rod moves to the middle of the first PCB board. The first driving structure drives the first pressure rod and the second pressure rod through the second driving board to apply downward stable bending forces to the second PCB board and the first PCB board respectively, thereby realizing continuous and uninterrupted testing of MLCC, thereby realizing efficient, stable and continuous bending strength testing of multiple MLCCs. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a three-dimensional MLCC bending strength test device. Figure 1 .

[0022] Figure 2 It is a three-dimensional MLCC bending strength test device. Figure 2 .

[0023] Figure 3 It is a front view of a MLCC bending strength test device.

[0024] Figure 4 yes Figure 3 Cross-sectional view at AA in the middle.

[0025] Figure 5 It is a three-dimensional diagram of the pressurized structure in an MLCC bending strength test device.

[0026] Figure 6 It is a three-dimensional diagram of the hoisting structure and pressure rod in the MLCC bending strength test device.

[0027] Figure 7 It is a three-dimensional diagram of a hoisting structure, a pressure rod, a second drive plate and a first drive structure in an MLCC bending strength test device.

[0028] Figure 8 It is a three-dimensional diagram of a hoisting structure, a pressure rod, a second driving plate and a fixing structure in an MLCC bending strength test device.

[0029] Fig. 9 The present invention is a stereoscopic diagram of a third connecting plate, a clamping assembly and a second driving structure in an MLCC bending strength testing device.

[0030] Fig.10 It is a three-dimensional diagram of the support structure in an MLCC bending strength test device.

[0031] Fig.11 A three-dimensional diagram of a support plate and centering components in an MLCC bending strength test device.

[0032] Fig.12 It is a three-dimensional diagram of the limiting structure in the MLCC bending strength test device.

[0033] Fig.13 It is a stereoscopic diagram of a linear moving mechanism in an MLCC bending strength test device.

[0034] 1. Base; 2. Support structure; 21. Support plate; 22. Horizontal support assembly; 221. Support arm; 222. Roller; 23. Centering assembly; 231. Abutment plate; 2311. Limiting plate; 232. First guide column; 233. First spring; 234. Sleeve; 24. Limiting structure; 241. Support block; 242. Second guide column; 243. Lifting structure; 2431. First rectangular frame; 2432. Double-headed screw; 2433. First moving block; 2434. First driving plate; 2435. First connecting plate; 3. Pressurizing structure; 31. Lifting structure; 311. Lifting cross bar; 3111. Installation bin; 312. First fixed connection seat; 3121. Connecting sleeve; 32. Pressurizing rod; 33. First Second driving plate; 34, first driving structure; 341, first linear driver; 342, sliding connection structure; 3421, sliding sleeve; 3422, second connecting plate; 3423, third guide column; 3424, third spring; 35, fixed structure; 351, second fixed connecting seat; 352, hanging plate; 353, third connecting plate; 354, clamping assembly; 3541, clamping block; 3542, fourth guide column; 355, second driving structure; 3551, second linear driver; 3552, fourth connecting plate; 4, linear moving mechanism; 41, fifth connecting plate; 42, third fixed connecting seat; 43, third driving structure; 431, hanging frame; 432, second rectangular frame; 433, first screw; 434, second moving block. DETAILED DESCRIPTION

[0035] In order to further understand the features, technical means, specific objectives and functions of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0036] Reference Figures 1 to 13As shown: A MLCC bending strength test device includes a base 1, which is horizontally arranged and characterized in that it also includes a support structure 2, a pressure structure 3 and a linear moving mechanism 4; the support structure 2 is arranged in the middle of the base 1, and the support structure 2 is used to horizontally place a PCB board welded with MLCC, and the PCB board is connected to a capacitance parameter tester; the pressure structure 3 includes a hanging structure 31, a pressure rod 32, a second driving plate 33 and a first driving structure 34, the hanging structure 31 is horizontally arranged above the base 1, and the pressure rod 32 has a plurality of , and the lengths of the several pressure rods 32 are different, and the several pressure rods 32 are hoisted on the hoisting structure 31 at equal intervals. The second driving plate 33 is connected to the several pressure rods 32, and the middle part of the pressure rod 32 is connected to the second driving plate 33 through a pin shaft. The first driving structure 34 is arranged at one end of the second driving plate 33, and the action force of the first driving structure 34 is transmitted to the several pressure rods 32 at the same time through the second driving plate 33; the linear moving mechanism 4 is arranged above the pressure structure 3, and the linear moving mechanism 4 is used to drive the pressure structure 3 to move along the base 1.

[0037] The MLCC bending strength test is mainly used to evaluate the performance of the capacitor when subjected to bending stress. When testing the bending strength of MLCC, it is necessary to increase the bending depth multiple times to test the performance of MLCC at different bending depths. By setting a plurality of pressure rods 32 of different lengths and a linear moving mechanism 4, the plurality of pressure rods 32 of different lengths correspond to different bending depths of MLCC respectively. The staff horizontally places the PCB board welded with MLCC on the support structure 2, and makes the MLCC on the side of the PCB board away from the pressure rod 32. The linear moving mechanism 4 moves the first pressure rod 32 corresponding to the MLCC bending depth to the middle of the PCB board, and the first driving structure 34 drives the first pressure rod 32 to move. The first pressure rod 3 2 applies a downward stable bending force to the middle part of the PCB board, and the middle part of the PCB board bends downward. After keeping the PCB board bent for a certain period of time, it is necessary to change the bending depth of the PCB board. The first driving structure 34 drives the first pressure rod 32 away from the PCB board, and the linear moving mechanism 4 moves the second pressure rod 32 to the middle part of the PCB board. The first driving structure 34 drives the second pressure rod 32 to apply a downward stable bending force to the PCB board, and the bending depth of the PCB board changes. Repeating the above steps can realize bending the PCB board to different bending depths, so that stable bending forces of different sizes are applied to the PCB board in turn, so as to realize accurate control of the bending depth of the PCB board, thereby improving the accuracy of detecting the bending strength of MLCC.

[0038] Reference Figure 2 : There are a plurality of supporting structures 2, and the plurality of supporting structures 2 are arranged on the base 1 at equal intervals.

[0039] When it is necessary to test the bending strength of multiple MLCCs, the PCB boards welded with MLCCs need to be placed on the support structure 2 in turn, which makes the test efficiency of the bending strength of MLCCs low. By setting up several support structures 2, the staff places multiple PCB boards welded with MLCCs on multiple adjacent support structures 2 in turn, and the linear moving mechanism 4 moves the first pressure rod 32 to the middle of the first PCB board. The first pressure rod 32 applies a downward stable bending force to the first PCB board under the action of the first driving structure 34, and then the linear moving mechanism 4 drives the first pressure rod 32 to move to the middle of the second PCB board. At this time, the second pressure rod 32 moves to the middle of the first PCB board, and the first driving structure 34 drives the first pressure rod 32 and the second pressure rod 32 through the second driving plate 33 to apply downward stable bending forces to the second PCB board and the first PCB board respectively, thereby realizing continuous and uninterrupted testing of MLCCs, thereby realizing efficient, stable and continuous bending strength testing of multiple MLCCs.

[0040] Reference Figure 5 and Figure 6 As shown: the lifting structure 31 includes a lifting cross bar 311 and a first fixed connecting seat 312; the lifting cross bar 311 is horizontally arranged at the upper end of the base 1, and the lifting cross bar 311 is arranged along the supporting structure 2 arranged at equal intervals; there are a plurality of first fixed connecting seats 312, and the plurality of first fixed connecting seats 312 are fixed on the lifting cross bar 311 at equal intervals, and the distance between two adjacent first fixed connecting seats 312 is the same as the distance between two adjacent supporting structures 2, and the lower end of the first fixed connecting seat 312 is hinged with a connecting sleeve 3121, and the connecting sleeve 3121 is connected to one end of the pressure rod 32.

[0041] When multiple MLCCs are subjected to bending strength tests, if there is a pressure rod 32 with multiple different lengths that does not meet the MLCC bending depth, continuous and uninterrupted bending strength tests cannot be performed. By setting a lifting cross bar 311 and a plurality of first fixed connecting seats 312, before the bending strength tests of multiple MLCCs are performed, the staff arranges the pressure rods 32 with different lengths on one side of the lifting cross bar 311 in turn according to the changes in the bending depth of the MLCC, and then installs the multiple pressure rods 32 on the connecting sleeve 3121 in turn, and uses a pin shaft to connect the pressure rod 32 to the second driving plate 33, so as to achieve flexible adaptation to different bending depths, improve test accuracy, and thus help to improve the accuracy and efficiency of the MLCC bending strength test.

[0042] Reference Figure 5 , Figure 6 and Figure 7As shown in the figure, the first driving structure 34 includes a first linear driver 341 and a sliding connection structure 342; the first linear driver 341 is arranged at one end of the lifting cross bar 311, and an installation bin 3111 is provided at one end of the lifting cross bar 311, and the first linear driver 341 is fixed in the installation bin 3111; the sliding connection structure 342 is arranged on the lifting cross bar 311, and the sliding connection structure 342 connects the first linear driver 341 with the second driving plate 33, and the sliding connection structure 342 includes a sliding sleeve 3421, a second connecting plate 3422, and two third The guide column 3423 and the two third springs 3424, the sleeve 3421 is slidably set on the lifting cross bar 311, the middle part of the second connecting plate 3422 is connected to one end of the second driving plate 33, the two third guide columns 3423 are respectively set at the two ends of the second driving plate 33, one end of the third guide column 3423 passes through the sleeve 3421 and is connected to the second driving plate 33, the two third springs 3424 are respectively sleeved on the two third guide columns 3423, and the two ends of the third spring 3424 are respectively connected to the end of the third guide column 3423 and the sleeve 3421.

[0043] When it is necessary to drive several pressure rods 32 at the same time to apply downward temperature bending force to several PCB boards respectively, the first linear driver 341 pushes the sliding sleeve 3421 to move along the lifting cross bar 311, and the sliding sleeve 3421 drives the second connecting plate 3422 to move through the two third guide pillars 3423, and the second connecting plate 3422 applies thrust to the second driving plate 33, and the second driving plate 33 drives several pressure rods 32 to move. The pressure rod 32 drives the connecting sleeve 3121 to rotate around the hinge between the connecting sleeve 3121 and the first fixed connecting seat 312, and the second driving plate 33 will therefore move downward, and the second driving plate 33 drives the two third guide pillars 3423 and the sliding sleeve 3421 to slide relative to each other, thereby realizing simultaneous and accurate driving of multiple pressure rods 32 to apply downward bending force to different PCB boards respectively, thereby meeting the requirements of bending strength testing of different PCB boards.

[0044] Reference Figure 5 , Figure 8 and Fig. 9As shown: the pressurizing structure 3 also includes a fixing structure 35, which is arranged at the other end of the second driving plate 33, and the fixing structure 35 includes a second fixed connecting seat 351, a hanging plate 352, a third connecting plate 353, a clamping assembly 354 and a second driving structure 355; the second fixed connecting seat 351 is arranged at the other end of the hanging cross bar 311, and the second fixed connecting seat 351 is fixedly connected to the hanging cross bar 311; the hanging plate 352 is arranged at the lower end of the second fixed connecting seat 351; the middle part of the third connecting plate 353 is connected to one end of the second driving plate 33, and both ends of the third connecting plate 353 are provided with a clamping groove; there are two clamping assemblies 354, and the two clamping assemblies 354 are respectively arranged At both ends of the hanging plate 352, the clamping assembly 354 includes a fourth guide column 3542 and a clamping block 3541. The fourth guide column 3542 is arranged in parallel on the hanging plate 352. One end of the clamping block 3541 is slidably arranged on the fourth guide column 3542, and the other end of the clamping block 3541 is clamped in the clamping groove; the second driving structure 355 is arranged between the two clamping assemblies 354. The second driving structure 355 includes a second linear driver 3551 and a fourth connecting plate 3552. The second linear driver 3551 is fixed on the hanging plate 352. The middle part of the fourth connecting plate 3552 is connected to the output end of the second linear driver 3551, and the two ends of the fourth connection are respectively connected to the two clamping blocks 3541.

[0045] When the MLCC is subjected to a bending strength test, it is necessary to maintain the bending time for a period of time after the MLCC reaches the bending depth, and test whether the performance of the MLCC will change during this period of time. By setting a fixed structure 35, one end of the second drive plate 33 moves under the action of the first drive structure 34, and the second drive plate 33 drives the third connecting plate 353 to abut against the hanging plate 352, and then the second linear driver 3551 drives the fourth connecting plate 3552 to move, and the fourth connecting plate 3552 drives the two clamping blocks 3541 to move along the two fourth guide columns 3542 respectively, and the two clamping blocks 3541 move into the two clamping grooves, and the clamping blocks 3541 will apply a force on the third connecting plate 353 toward the hanging plate 352, so that the second drive plate 33 will not move, thereby avoiding changes in the bending depth of the PCB board caused by the pressure rod 32, thereby keeping the bending depth of the PCB board constant, and realizing the performance evaluation of the MLCC under long-term and constant stress.

[0046] Reference Figure 4 and Fig.10As shown: the support structure 2 includes a support plate 21, a horizontal support component 22 and a centering component 23; the support plate 21 is fixed on the base 1; there are two horizontal support components 22, and the two horizontal support components 22 are respectively arranged at both ends of the support plate 21, and the horizontal support component 22 includes a support arm 221 and a roller 222, one end of the support arm 221 is connected to the support plate 21, and the roller 222 is arranged at the other end of the support arm 221; there are two centering components 23, and the two centering components 23 are respectively arranged at both ends of the support plate 21.

[0047] The staff places the PCB with MLCC welded on the support structure 2. If the MLCC is not directly under the pressure rod 32, the MLCC may not bend when the pressure rod 32 applies bending force to the PCB. By setting the horizontal support component 22 and the centering component 23, the two ends of the PCB board are respectively placed on two rollers 222, and the two centering components 23 apply forces to the PCB from both ends of the PCB board respectively. The PCB board moves on the two rollers 222. When the forces applied by the two centering components 23 on the PCB board are the same, the PCB board will reach a balanced state. At this time, the MLCC on the PCB board will naturally move to directly under the pressure rod 32, thereby ensuring that the pressure rod 32 can accurately apply bending force to cause the MLCC to undergo the expected bending deformation.

[0048] Reference Fig.10 and Fig.11 As shown: the centering component 23 includes an abutment plate 231, a first guide column 232 and a first spring 233; the abutment plate 231 is arranged at one end of the support plate 21, and both ends of the abutment plate 231 are provided with a limiting plate 2311; there are a plurality of first guide columns 232, and one end of the first guide column 232 passes through one end of the support plate 21 and is connected to the abutment plate 231; the first spring 233 is sleeved on the first guide column 232, and the two ends of the first spring 233 are respectively abutted against the abutment plate 231 and the support plate 21.

[0049] When the PCB board is bent, the two ends of the PCB board will shrink toward the middle of the PCB board, and the ends of the PCB board will be separated from the centering component 23. The two centering components 23 lose the force on the PCB board, and the bending process of the PCB board may not be controlled. By setting the abutment plate 231, the first guide column 232 and the first spring 233, one end of the PCB board is stuck between the two limit plates 2311. When the pressure rod 32 applies a bending force to the PCB board, the PCB board will not move along the abutment plate 231, thereby ensuring the stability of the PCB board during the test. When the PCB board is bent, the first spring 233 pushes the abutment plate 231 to move, so that the abutment plate 231 always remains tightly against the PCB board, so that the two ends of the PCB board are always subject to the force of the two centering components 23, thereby effectively solving the problem that the PCB board cannot be controlled during the bending process, and ensuring the accuracy and reliability of the test.

[0050] Reference Fig.11 As shown, the centering component 23 also includes a sleeve 234, the interior of the sleeve 234 is provided with an internal thread, and one end of one of the first guide pillars 232 is provided with an external thread, and the external thread matches the internal thread.

[0051] Since the first spring 233 will apply a force on the abutment plate 231 toward the middle of the support plate 21, the distance between the two abutment plates 231 is not enough to directly place the PCB board. When placing the PCB board, the staff needs to press one abutment plate 231 to one end of the support plate 21 first, and after one end of the PCB board is abutted against the abutment plate 231, press the other abutment plate 231 to the other end of the support plate 21, and then place the PCB board horizontally on the horizontal support assembly 22, and finally press the other abutment plate 231 against the other end of the PCB board. The process is not only complicated, but also during the process, if the control of the abutment plate 231 is lost, the abutment plate 231 rebounds under the action of the first spring 233, and the abutment plate 231 hits the end of the PCB board, which may cause damage to the PCB board. By setting the sleeve 234, the sleeve 234 and the opening Corresponding to the first guide column 232 with external threads, the sleeve 234 is rotated forward so that the sleeve 234 is sleeved on the first guide column 232, and one end of the sleeve 234 abuts against the end of the support plate 21. The sleeve 234 will therefore apply a force toward the outside of the support plate 21 to the first guide column 232, and the first guide column 232 drives the abutment plate 231 to move toward one end of the support plate 21. At this time, the distance between the two abutment plates 231 is sufficient to put down the PCB board. After the PCB board is placed on the horizontal support assembly 22, the sleeve 234 is rotated reversely, the sleeve 234 is separated from the first guide column 232, and the first spring 233 pushes the abutment plate 231 to move toward the PCB board, thereby simplifying the placement process of the PCB board, reducing the difficulty of operation, and effectively protecting the PCB board from damage during the placement process, thereby improving the reliability and efficiency of the test process.

[0052] Reference Fig.10 and Fig.12 As shown: the support structure 2 also includes a limiting structure 24, which is arranged in the middle of the support plate 21. The limiting structure 24 includes a support block 241, two second guide columns 242 and a lifting structure 243. The support block 241 is arranged in the middle of the support plate 21, and the two second guide columns 242 are respectively arranged at both ends of the support block 241. One end of the second guide column 242 is fixedly connected to the support plate 21, and the two ends of the support block 241 are respectively sleeved on the two second guide columns 242. The lifting structure 243 includes a first rectangular frame 2431, a double-headed screw 2432, Two first moving blocks 2433, two first driving plates 2434 and a first connecting plate 2435, the first rectangular frame 2431 is set on the support plate 21, the two ends of the double-headed screw 2432 are respectively connected to the two ends of the first rectangular frame 2431, the two first moving blocks 2433 are respectively connected to the two ends of the double-headed screw 2432, the two first driving plates 2434 are respectively connected to the two first moving blocks 2433, the middle part of the first connecting plate 2435 is connected to the support block 241, and the two ends of the first connecting plate 2435 are respectively connected to the two first driving plates 2434.

[0053] Before the pressure rod 32 applies bending force to the PCB board, the lifting structure 243 works, and the double-headed screw 2432 rotates to drive the two first moving blocks 2433 to approach each other. The force applied by the two first moving blocks 2433 to the two first driving plates 2434 is decomposed into a vertical upward force, and the support block 241 moves upward along the second guide column 242. When the distance between the upper end of the support block 241 and the lower end of the PCB board is the same as the bending depth of the PCB board, the position of the support block 241 is fixed, and then the pressure rod 32 applies bending force to the PCB board. After the PCB board bends until it abuts against the upper end of the support block 241, it means that the PCB board has reached the bending depth, thereby realizing precise bending of the PCB board, ensuring the accuracy of the bending depth and shape, and improving product quality and production efficiency.

[0054] Reference Figure 2 and Fig.13 As shown: the linear moving mechanism 4 includes a fifth connecting plate 41, a third fixed connecting seat 42 and a third driving structure 43; the fifth connecting plate 41 is arranged above the lifting cross bar 311; the third fixed connecting seat 42 has two, and the two third fixed connecting seats 42 are respectively arranged at the two ends of the fifth connecting plate 41, and the two ends of the third fixed connecting seat 42 are respectively connected to the fifth connecting plate 41 and the lifting cross bar 311; the third driving structure 43 is arranged at the upper end of the fifth connecting plate 41, and the third driving structure 43 includes two hanging frames 431, a second rectangular frame 432, a first screw 433 and a second moving block 434, the two hanging frames 431 are respectively arranged at the two ends of the base 1, the two ends of the second rectangular frame 432 are respectively connected to the two hanging frames 431, the two ends of the first screw 433 are respectively connected to the two ends of the second rectangular frame 432, the second moving block 434 is arranged on the first screw 433, and the second moving block 434 is connected to the middle part of the fifth connecting plate 41.

[0055] When it is necessary to move the position of the pressure rod 32, the third driving structure 43 works, the first screw 433 can be driven to rotate by a driver such as a motor, the second moving block 434 moves along the first screw 433, the second moving block 434 drives the fifth connecting plate 41 to move, the fifth connecting plate 41 drives the lifting cross bar 311 to move through the two third fixed connecting seats 42, the lifting cross bar 311 drives the pressure rod 32, the second driving plate 33, the first driving structure 34 and the fixed structure 35 to move synchronously, thereby facilitating the adjustment of the position of the pressure rod 32 and improving the efficiency of the device.

[0056] The above embodiments only express one or several implementation modes of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the present invention. It should be pointed out that, for those of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the attached claims.

Claims

1. A MLCC bending strength testing device, comprising a base (1), the base (1) being arranged horizontally, characterized in that: It also includes a support structure (2), a pressurizing structure (3) and a linear moving mechanism (4); The support structure (2) is arranged in the middle of the base (1), and the support structure (2) is used to horizontally place a PCB board welded with MLCC, and the PCB board is connected to a capacitance parameter tester; The pressurizing structure (3) comprises a hoisting structure (31), a pressurizing rod (32), a second drive plate (33) and a first drive structure (34); the hoisting structure (31) is horizontally arranged above the base (1); there are a plurality of pressurizing rods (32), and the lengths of the plurality of pressurizing rods (32) are different; the plurality of pressurizing rods (32) are hoisted on the hoisting structure (31) at equal intervals; the second drive plate (33) is connected to the plurality of pressurizing rods (32); the first drive structure (34) is arranged at one end of the second drive plate (33); and the action force of the first drive structure (34) is simultaneously transmitted to the plurality of pressurizing rods (32) through the second drive plate (33); The linear moving mechanism (4) is arranged above the pressurizing structure (3), and the linear moving mechanism (4) is used to drive the pressurizing structure (3) to move along the base (1).

2. The MLCC bending strength testing device according to claim 1, characterized in that: There are a plurality of support structures (2), and the plurality of support structures (2) are arranged on the base (1) at equal intervals.

3. The MLCC bending strength testing device according to claim 1, characterized in that: The hoisting structure (31) comprises a hoisting cross bar (311) and a first fixed connection seat (312); The hoisting cross bar (311) is horizontally arranged at the upper end of the base (1), and the hoisting cross bar (311) is arranged along the support structures (2) arranged at equal intervals; There are a plurality of first fixed connection seats (312), the plurality of first fixed connection seats (312) being fixed on the hoisting cross bar (311) at equal intervals, and the distance between two adjacent first fixed connection seats (312) is the same as the distance between two adjacent support structures (2), and a connection sleeve (3121) is hinged at the lower end of the first fixed connection seat (312).

4. The MLCC bending strength testing device according to claim 1, characterized in that: The first driving structure (34) comprises a first linear driver (341) and a sliding connection structure (342); The first linear drive (341) is arranged at one end of the lifting crossbar (311); The sliding connection structure (342) is arranged on the hoisting crossbar (311), and the sliding connection structure (342) connects the first linear drive (341) and the second drive plate (33).

5. The MLCC bending strength testing device according to claim 1, characterized in that: The pressurizing structure (3) further comprises a fixing structure (35), the fixing structure (35) being arranged at the other end of the second driving plate (33), the fixing structure (35) comprising a second fixing connection seat (351), a hanging plate (352), a third connecting plate (353), a clamping assembly (354) and a second driving structure (355); The second fixed connection seat (351) is arranged at the other end of the lifting cross bar (311), and the second fixed connection seat (351) is fixedly connected to the lifting cross bar (311); The hanging plate (352) is arranged at the lower end of the second fixed connection seat (351); The middle portion of the third connecting plate (353) is connected to one end of the second driving plate (33), and both ends of the third connecting plate (353) are provided with a card slot; There are two clamping assemblies (354), and the two clamping assemblies (354) are respectively arranged at two ends of the hanging plate (352); The second driving structure (355) is arranged between the two clamping assemblies (354).

6. The MLCC bending strength testing device according to claim 2, characterized in that: The support structure (2) comprises a support plate (21), a horizontal support component (22) and a centering component (23); The support plate (21) is fixed on the base (1); There are two horizontal support assemblies (22), and the two horizontal support assemblies (22) are respectively arranged at two ends of the support plate (21); There are two centering components (23), and the two centering components (23) are respectively arranged at two ends of the support plate (21).

7. The MLCC bending strength testing device according to claim 6, characterized in that: The centering component (23) comprises an abutment plate (231), a first guide column (232) and a first spring (233); The abutment plate (231) is arranged at one end of the support plate (21), and both ends of the abutment plate (231) are provided with limit plates (2311); There are a plurality of first guide pillars (232), and one end of the first guide pillar (232) passes through one end of the support plate (21) and is connected to the abutment plate (231); The first spring (233) is sleeved on the first guide column (232), and two ends of the first spring (233) are respectively in contact with the contact plate (231) and the support plate (21).

8. The MLCC bending strength testing device according to claim 7, characterized in that: The centering component (23) further comprises a sleeve (234), and an internal thread is formed inside the sleeve (234).

9. The MLCC bending strength testing device according to claim 6, characterized in that: The support structure (2) further comprises a limiting structure (24), wherein the limiting structure (24) is arranged in the middle of the support plate (21).

10. The MLCC bending strength testing device according to claim 1, characterized in that: The linear motion mechanism (4) comprises a fifth connecting plate (41), a third fixed connecting seat (42) and a third driving structure (43); The fifth connecting plate (41) is arranged above the lifting cross bar (311); There are two third fixed connection seats (42), the two third fixed connection seats (42) are respectively arranged at two ends of the fifth connection plate (41), and the two ends of the third fixed connection seats (42) are respectively connected to the fifth connection plate (41) and the hoisting cross bar (311); The third driving structure (43) is arranged on the upper end of the fifth connecting plate (41).

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