Testing device for circuit board

Abstract

The invention provides a testing device for a circuit board, and relates to the technical field of circuit board testing devices.The testing device comprises a base, a longitudinal electric cylinder is arranged at the top of the base, a placement plate is arranged on a sliding block of the longitudinal electric cylinder, a connecting plate is arranged above the placement plate, a plurality of probes are arranged at the bottom of the connecting plate, and positioning columns are arranged at the corners of the bottom of the connecting plate; limiting adjusting assemblies used for stopping the connecting plate are arranged at the positions, corresponding to the positioning columns, of the top of the base, and buffering assemblies used for buffering the positioning columns are arranged in the limiting adjusting assemblies. The structure is reasonable, the probe can be limited, and the use effect is good.

Description

Technical Field

[0001] This invention relates to the field of circuit board testing equipment technology, and more specifically to a testing equipment for circuit boards. Background Technology

[0002] Circuit boards have a large number of electronic components soldered on them, such as capacitors, resistors, chips, diodes, etc. After these electronic components are soldered to the circuit board, in order to ensure the stability of the soldering between the electronic components and the circuit board, it is necessary to use a testing device to test the pins of the components on the circuit board, to detect whether there is a cold solder joint on the pins, and whether the electronic components are damaged during the soldering process.

[0003] In existing technologies, circuit board testing devices typically use a cylinder to move a probe to a suitable vertical position to contact the pins on the circuit board for testing. However, in this method, as the cylinder presses down and moves the probe downwards, the probe lacks a limiting stop and makes hard contact with the circuit board, easily damaging the board and resulting in poor performance. Therefore, there is an urgent need for a circuit board testing device to solve these problems. Summary of the Invention

[0004] In view of the shortcomings of the existing technology, the purpose of this invention is to provide a testing device for circuit boards to solve the problems mentioned in the background art. The invention has a reasonable structure, can limit the probe, and has good performance.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a testing device for circuit boards, comprising: The base has a longitudinal electric cylinder on its top, a placement plate on the sliding block of the longitudinal electric cylinder, a connecting plate above the placement plate, multiple probes at the bottom of the connecting plate, and positioning posts at the bottom corners of the connecting plate. Limit adjustment components for stopping the connecting plate are located at positions on the top of the base corresponding to the positioning posts, and buffer components for cushioning the positioning posts are located inside the limit adjustment components.

[0006] Furthermore, the limiting adjustment assembly includes a threaded hole opened on the top of the base and located directly below the positioning post, and a threaded rod is provided inside the threaded hole; The threaded rod includes a threaded post disposed inside the threaded hole. A limiting plate is provided on the top of the threaded post. A connecting bearing is provided at the connection between the limiting plate and the threaded post. Both the top of the threaded post and the limiting plate are provided with a through positioning hole that matches the positioning post. The limiting plate has a horizontal plate on its side wall, the base has a vertical plate on its top that contacts the horizontal plate, the vertical plate has a scale line on the side near the horizontal plate, and the threaded column has a fixing rod on its side wall.

[0007] Furthermore, the threaded column sidewall is provided with a support nut that contacts the top of the base, the top of the base is provided with a limiting column that penetrates the horizontal plate, and a connecting block is provided between the top of the limiting column and the top of the vertical plate.

[0008] Furthermore, the buffer assembly includes a blocking plate disposed at the bottom of the threaded post, a buffer spring disposed at the top of the blocking plate inside the positioning hole, and a buffer post disposed at the top of the buffer spring inside the positioning hole.

[0009] Furthermore, a pair of positioning adjustment components for positioning the opposite sides of the circuit board are symmetrically arranged on the top of the placement plate. The positioning adjustment assembly includes an adjustment seat disposed on the top of the placement plate. A pair of longitudinal moving grooves are symmetrically provided on opposite side walls of the adjustment seat. A longitudinal moving plate is disposed inside each pair of longitudinal moving grooves. A transverse positioning plate is disposed on the side of each pair of longitudinal moving plates that is far apart from each other. A longitudinal stop groove is provided on the top of each pair of longitudinal moving plates. A pair of locking members are symmetrically provided on the top of the adjustment seat, which respectively contact the pair of longitudinal stop grooves. The top of the placement plate is provided with a horizontal adjustment groove, the bottom of the adjustment seat is provided with a moving block located inside the horizontal adjustment groove, the horizontal adjustment groove is provided with a guide post that passes through the moving block, the top of the guide post is provided with a horizontal stop groove, and the top of the adjustment seat is provided with a stop member that contacts the horizontal stop groove.

[0010] Furthermore, the locking component includes a locking wing bolt disposed on the top of the adjusting seat and communicating with the longitudinal moving groove. The bottom of the locking wing bolt is provided with a locking block located inside the longitudinal stop groove, and a connecting bearing is provided at the connection between the locking wing bolt and the locking block.

[0011] Furthermore, the stop member includes a stop butterfly bolt disposed on the top of the adjusting seat and communicating with the transverse stop groove, and the bottom of the stop butterfly bolt is provided with a stop disc located inside the transverse stop groove.

[0012] Furthermore, the top of the base is provided with a limiting component for limiting the longitudinal movement distance of the placement plate; The limiting component includes a limiting sensor disposed on the top of the base, and a detection block is disposed on the bottom of the placement plate at a position corresponding to the limiting sensor.

[0013] Furthermore, a pair of adjusting blocks are symmetrically arranged on the side wall of the limit sensor. Each pair of adjusting blocks has a square groove on its top and a locking bolt that penetrates the square groove and is inserted into the base.

[0014] Furthermore, a column is provided at the top corner of the base, and a top plate is provided between the tops of the columns; The lifting drive assembly includes a drive cylinder disposed on the top of the top plate, and a mounting plate connected to the connecting plate is disposed on the telescopic shaft of the drive cylinder. The top of the top plate is provided with a lifting drive assembly for driving the connecting plate to move in the vertical direction; The placement plate is equipped with an ejection assembly for ejecting the circuit board. The ejection assembly includes ejection electric push rods symmetrically arranged at the bottom of the placement plate. An ejection plate located at the top of the placement plate is provided on the telescopic shaft of the ejection electric push rod. An embedding groove matching the ejection plate is opened on the top of the placement plate. The upper surface of the placement plate is flush with the upper surface of the ejection plate.

[0015] The beneficial effects achieved by the present invention using the above structure are as follows: This invention uses a limit adjustment component to hard limit and stop the connecting plate, ensuring that the probe on the connecting plate will not continue to move downward when it contacts the pin on the circuit board, thus avoiding damage to the circuit board and achieving good performance. The buffer component buffers the positioning post, thereby buffering the probe on the mounting plate, reducing the impact force when the probe contacts the pin on the circuit board, and further preventing the probe from damaging the circuit board. Attached Figure Description

[0016] Other features, objects, and advantages of the present invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings: Figure 1 This is a perspective view of a circuit board testing device according to an embodiment of the present invention; Figure 2 This is a front view of a circuit board testing apparatus according to an embodiment of the present invention; Figure 3 This is a left sectional view of a circuit board testing apparatus according to an embodiment of the present invention; Figure 4 This is a perspective view of the connection between the placement board and the positioning adjustment assembly in a circuit board testing device according to an embodiment of the present invention. Figure 5 This is a cross-sectional perspective view of the connection between the placement board and the positioning adjustment assembly in a circuit board testing device according to an embodiment of the present invention. Figure 6A perspective view of a positioning adjustment component in a circuit board testing apparatus according to an embodiment of the present invention; Figure 7 This is a front sectional view of a positioning adjustment component in a circuit board testing apparatus according to an embodiment of the present invention; Figure 8 This is a perspective view of the connection point of multiple limit adjustment components in a circuit board testing device according to an embodiment of the present invention; Figure 9 This is a front sectional view of a limit adjustment component in a circuit board testing device according to an embodiment of the present invention; Figure 10 This is a cross-sectional perspective view of a limit adjustment component in a circuit board testing device according to an embodiment of the present invention; Figure 11 This is a perspective view of the connection between the placement plate and the limiting component in a circuit board testing device according to an embodiment of the present invention; Figure 12 According to an embodiment of the present invention Figure 11 Enlarged view of A in the middle; In the diagram: 1. Base; 2. Column; 3. Top plate; 4. Lifting drive assembly; 41. Drive cylinder; 42. Mounting plate; 5. Connecting plate; 51. Probe; 52. Positioning post; 6. Limit adjustment assembly; 61. Connecting block; 62. Vertical plate; 621. Scale line; 63. Limiting post; 64. Horizontal plate; 65. Threaded rod; 651. Limiting plate; 652. Connecting bearing; 653. Positioning hole; 654. Threaded post; 66. Fixing rod; 67. Support nut; 68. Threaded hole; 7. Longitudinal electric cylinder; 8. Placement plate; 9. Ejection assembly; 91. Ejection electric push rod; 92. Ejection plate; 93. Embedded groove; 10. Limit assembly; 101. Adjusting block; 101 1. Square groove; 102. Limit sensor; 103. Detection block; 104. Locking bolt; 11. Positioning adjustment assembly; 111. Adjustment seat; 1111. Moving block; 1112. Longitudinal moving groove; 112. Transverse positioning plate; 113. Longitudinal moving plate; 1131. Longitudinal stop groove; 114. Locking element; 1141. Locking wing bolt; 1142. Connecting bearing; 1143. Locking block; 115. Transverse adjustment groove; 116. Guide column; 1161. Transverse stop groove; 117. Stopping element; 1171. Stopping wing bolt; 1172. Stopping disc; 12. Buffer assembly; 121. Blocking plate; 122. Buffer spring; 123. Buffer column. Detailed Implementation

[0017] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0018] like Figure 1 As shown, the present invention provides a technical solution: a testing device for circuit boards, comprising: A base 1 has a placement plate 8 mounted on the sliding block of the longitudinal electric cylinder 7. A connecting plate 5 is mounted above the placement plate 8. Multiple probes 51 are mounted on the bottom of the connecting plate 5. Positioning posts 52 are mounted at the bottom corners of the connecting plate 5. Limit adjustment components 6 are mounted on the top of the base 1 at positions corresponding to the positioning posts 52 to stop the connecting plate 5. A buffer component 12 is installed inside the limit adjustment component 6 to buffer the positioning posts 52. This design uses the limit adjustment component 6 to hard limit and stop the connecting plate 5, ensuring that the probes 51 on the connecting plate 5 will not continue to move downwards when they contact the pins on the circuit board, thus preventing the probes 51 from damaging the circuit board. The buffer component 12 buffers the positioning posts 52, thereby buffering the probes 51 on the mounting plate 42, reducing the impact force when the probes 51 contact the pins on the circuit board, and further preventing the probes 51 from damaging the circuit board.

[0019] Reference Figure 3 , Figure 9 and Figure 10 The limit adjustment component 6 includes a threaded hole 68 opened on the top of the base 1 and located directly below the positioning post 52, and a threaded rod 65 is provided inside the threaded hole 68; The threaded rod 65 includes a threaded post 654 disposed inside the threaded hole 68. A limiting plate 651 is provided on the top of the threaded post 654. A connecting bearing 652 is provided at the connection between the limiting plate 651 and the threaded post 654. Both the top of the threaded post 654 and the limiting plate 651 are provided with a through positioning hole 653 that matches the positioning post 52. The side wall of the limiting plate 651 is provided with a horizontal plate 64, the top of the base 1 is provided with a vertical plate 62 that contacts the horizontal plate 64, the side of the vertical plate 62 near the horizontal plate 64 is provided with a scale line 621, and the side wall of the threaded column 654 is provided with a fixing rod 66. This design uses force applied to the fixing rod 66 to drive the threaded post 654 to rotate along the threaded hole 68. The threaded connection between the threaded post 654 and the threaded hole 68 ensures that the threaded post 654 moves vertically. Under the action of the connecting bearing 652, the horizontal plate 64 on the limiting plate 651 does not rotate with the threaded post 654, ensuring that the horizontal plate 64 is always in contact with the side wall of the vertical plate 62, making it easy to observe the position of the horizontal plate 64 on the scale line 621. Through the horizontal plate 64 and the scale line 621, the threaded rods 65 corresponding to the positioning posts 52 at the bottom corner of the connecting plate 5 are adjusted to the same height, improving the stability of the limiting of the connecting plate 5. This ensures that the probe 51 on the connecting plate 5 will not continue to move downward when it contacts the pins on the circuit board, avoiding damage to the circuit board by the probe 51, resulting in good performance. At the same time, by adjusting the height of the threaded rod 65, the limiting of circuit boards of different thicknesses can be adjusted, improving the versatility of use.

[0020] Reference Figure 1 , Figure 2 and Figure 8 The threaded post 654 has a support nut 67 on its side wall that contacts the top of the base 1. The top of the base 1 has a limiting post 63 that penetrates the horizontal plate 64. A connecting block 61 is provided between the top of the limiting post 63 and the top of the vertical plate 62. This design improves the stability of the connection between the threaded post 654 and the base 1 through the support nut 67; improves the stability of the vertical movement of the horizontal plate 64 through the limiting post 63; and improves the stability of the connection between the vertical plate 62 and the column 2 through the connecting block 61. The side walls of both the fixing rod 66 and the support nut 67 have multiple insertion holes, one of which contains an insertion post, allowing for easy application of force to drive the threaded rod 654 and the support nut 67 to rotate.

[0021] Reference Figure 3 , Figure 9 and Figure 10 The buffer assembly 12 includes a blocking plate 121 disposed at the bottom of the threaded post 654. A buffer spring 122 located inside the positioning hole 653 is disposed at the top of the blocking plate 121, and a buffer post 123 located inside the positioning hole 653 is disposed at the top of the buffer spring 122. This design buffers the positioning post 52 through the buffer post 123 and the buffer spring 122, reducing the impact force when the probe 51 contacts the pins on the circuit board, and further preventing the probe 51 from damaging the circuit board. The blocking plate 121 is completely embedded in the bottom of the threaded post 654.

[0022] Reference Figure 1 , Figure 4 and Figure 5 A pair of positioning adjustment components 11 are symmetrically arranged on the top of the placement plate 8 for positioning the opposite sides of the circuit board. The positioning adjustment assembly 11 includes an adjustment seat 111 disposed on the top of the placement plate 8. A pair of longitudinal moving grooves 1112 are symmetrically provided on the opposite side walls of the adjustment seat 111. A longitudinal moving plate 113 is provided inside each of the pair of longitudinal moving grooves 1112. A transverse positioning plate 112 is provided on the side of the pair of longitudinal moving plates 113 that is far apart from each other. A longitudinal stop groove 1131 is provided on the top of each of the pair of longitudinal moving plates 113. A pair of locking members 114 are symmetrically provided on the top of the adjustment seat 111, which respectively contact the pair of longitudinal stop grooves 1131. The top of the placement plate 8 is provided with a horizontal adjustment groove 115, and the bottom of the adjustment seat 111 is provided with a moving block 1111 located inside the horizontal adjustment groove 115. The horizontal adjustment groove 115 is provided with a guide post 116 that passes through the moving block 1111. The top of the guide post 116 is provided with a horizontal stop groove 1161, and the top of the adjustment seat 111 is provided with a stop member 117 that contacts the horizontal stop groove 1161. This design applies force to a pair of longitudinally moving plates 113 in the positioning adjustment assembly 11, causing them to move longitudinally along the longitudinal moving groove 1112. The movement of the pair of longitudinally moving plates 113 causes the transverse positioning plate 112 to move longitudinally, thus adjusting the longitudinal length of the circuit board and ensuring that the longitudinal length of the circuit board is the same as the distance between the pair of transverse positioning plates 112. Finally, the locking member 114 contacts the longitudinal stop groove 1131 on the longitudinally moving plate 113 to stop the longitudinally moving plate 113, thereby fixing the position of the transverse positioning plate 112. Applying force to the adjusting seat 111 causes the moving block 1111 on the adjusting seat 111 to move along the guide post 1. Under the action of the limit switch 16, it moves along the transverse adjustment groove 115 and finally contacts the transverse stop groove 1161 on the guide post 116 through the stop 117 to fix the adjusted adjustment seat 111. By adjusting the adjustment seat 111 in the pair of positioning adjustment components 11, the transverse distance between the pair of adjustment seats 111 can be matched with the transverse length of the circuit board, which can adapt to the positioning adjustment of circuit boards of different sizes. The thickness of the adjustment seat 111 is the same as the thickness of the transverse positioning plate 112. The placement plate 8 is provided with scale lines 621 to facilitate the observation and adjustment of the distance between the pair of transverse positioning plates 112 and the transverse distance between the pair of adjustment seats 111.

[0023] Reference Figure 6 and Figure 7 The locking component 114 includes a locking wing bolt 1141 disposed on the top of the adjusting seat 111 and communicating with the longitudinal moving groove 1112. The bottom of the locking wing bolt 1141 has a locking block 1143 located inside the longitudinal stop groove 1131. A connecting bearing 1142 is provided at the connection between the locking wing bolt 1141 and the locking block 1143. This design ensures that the locking wing bolt 1141 drives the locking block 1143 to move vertically and contact the longitudinal stop groove 1131, thus fixing the adjusted position of the transverse positioning plate 112 on the longitudinal moving plate 113.

[0024] Reference Figure 5 and Figure 7The stop element 117 includes a stop wing bolt 1171 disposed on the top of the adjusting seat 111 and communicating with the transverse stop groove 1161. The bottom of the stop wing bolt 1171 is provided with a stop disc 1172 located inside the transverse stop groove 1161. This design ensures that the stop wing bolt 1171 drives the stop disc 1172 to contact the transverse stop groove 1161, thereby fixing the adjusted position of the adjusting seat 111.

[0025] Reference Figure 1 , Figure 11 and Figure 12 The base 1 is provided with a limiting component 10 at the top for limiting the longitudinal movement distance of the placement plate 8; The limiting assembly 10 includes a limiting sensor 102 mounted on the top of the base 1, a detection block 103 mounted on the bottom of the placement plate 8 at a position corresponding to the limiting sensor 102, a PLC controller mounted on the base 1, an A / D converter mounted at the input of the PLC controller, a D / A converter mounted at the output of the PLC controller, the limiting sensor 102 being electrically connected to the A / D converter, and the longitudinal electric cylinder 7 being electrically connected to the D / A converter. This design uses the operation of the longitudinal electric cylinder 7 to drive the placement plate 8 to move longitudinally, which in turn drives the detection block 103 to move longitudinally. When the detection block 103 moves to the position corresponding to the limiting sensor 102, the limiting sensor 102 senses the detection block 103 and sends a signal to the PLC controller, which then stops the longitudinal electric cylinder 7. The limiting sensor 102 is U-shaped.

[0026] Reference Figure 12 A pair of adjusting blocks 101 are symmetrically arranged on the side wall of the limit sensor 102. Each pair of adjusting blocks 101 has a square slot 1011 on its top, and a locking bolt 104 that passes through the square slot 1011 and inserts into the base 1 on its top. This design allows for convenient adjustment of the longitudinal position of the adjusting blocks 101 via the square slots 1011, thereby adjusting the longitudinal position of the limit sensor 102. Finally, the locking bolts 104 are threadedly connected to the base 1 to stop the adjusting blocks 101, completing the fixation of the limit sensor 102 after longitudinal position adjustment.

[0027] Reference Figure 1 , Figure 2 and Figure 4 A column 2 is provided at the top corner of the base 1, a top plate 3 is provided between the tops of the columns 2, and a longitudinal electric cylinder 7 is provided at the top of the base 1. The top of the top plate 3 is provided with a lifting drive assembly 4 for driving the connecting plate 5 to move in the vertical direction; The lifting drive assembly 4 includes a drive cylinder 41 disposed on the top of the top plate 3, and a mounting plate 42 connected to the connecting plate 5 is disposed on the telescopic shaft of the drive cylinder 41. The placement plate 8 is equipped with an ejection assembly 9 for ejecting the circuit board; The ejection assembly 9 includes ejection electric push rods 91 symmetrically arranged at the bottom of the placement plate 8. An ejection plate 92 is mounted on the telescopic shaft of the ejection electric push rods 91 and located at the top of the placement plate 8. The top of the placement plate 8 has an insertion groove 93 that matches the ejection plate 92, and the upper surface of the placement plate 8 is flush with the upper surface of the ejection plate 92. This design uses the ejection electric push rods 91 in the ejection assembly 9 to drive the ejection plate 92 to move vertically, ejecting the circuit board between a pair of positioning adjustment components 11, facilitating the removal of the circuit board. The ejection plate 92 is located between a pair of horizontal adjustment grooves 115.

[0028] Reference Figures 1-12 As an embodiment of the present invention: when the circuit board needs to be tested, the operator drives the placement plate 8 to move longitudinally by operating the longitudinal electric cylinder 7. The movement of the placement plate 8 drives the detection block 103 to move longitudinally. When the detection block 103 moves to the position corresponding to the limit sensor 102, the limit sensor 102 senses the detection block 103 and then sends a signal to the PLC controller. The PLC controller stops the longitudinal electric cylinder 7 from moving. At this time, the placement plate 8 is located directly below the connecting plate 5.

[0029] Next, by applying force to a pair of longitudinal moving plates 113 in the positioning adjustment assembly 11, they are driven to move longitudinally along the longitudinal moving groove 1112. The movement of the pair of longitudinal moving plates 113 drives the pair of transverse positioning plates 112 to move longitudinally, which can adjust the longitudinal length of the circuit board and ensure that the longitudinal length of the circuit board is the same as the distance between the pair of transverse positioning plates 112. Finally, the locking member 114 contacts the longitudinal stop groove 1131 on the longitudinal moving plate 113 to stop the longitudinal moving plate 113, thereby fixing the position of the transverse positioning plate 112 and completing the positioning adjustment of the longitudinal length of the circuit board.

[0030] By applying force to the adjusting seat 111, the moving block 1111 on the adjusting seat 111 moves along the transverse adjusting groove 115 under the limiting action of the guide post 116. Finally, the adjusting seat 111 is fixed by contacting the transverse stop groove 1161 on the guide post 116 through the stop 117. By adjusting the adjusting seat 111 in the pair of positioning adjusting components 11, the transverse distance between the pair of adjusting seats 111 can be matched with the transverse length of the circuit board, thus completing the positioning adjustment of the transverse length of the circuit board and adapting to the positioning adjustment of circuit boards of different sizes. The circuit board is positioned by the rectangle formed by the pair of adjusting seats 111 and the two pairs of transverse positioning plates 112 in the pair of positioning adjusting components 11, improving the stability of the contact between the probe 51 and the pins on the circuit board and preventing the circuit board from shifting or tilting.

[0031] By applying force to the fixed rod 66, the threaded column 654 is driven to rotate along the threaded hole 68. The threaded connection between the threaded column 654 and the threaded hole 68 ensures that the threaded column 654 moves in the vertical direction. Under the action of the connecting bearing 652, the rotation of the threaded column 654 ensures that the horizontal plate 64 is always in contact with the side wall of the vertical plate 62, making it easy to observe the position of the horizontal plate 64 on the scale line 621. It also ensures that the threaded rods 65 corresponding to the positioning columns 52 at the bottom corner of the connecting plate 5 are adjusted to the same height, improving the stability of the limiting of the connecting plate 5 and completing the limiting adjustment of the probe 51.

[0032] Finally, the drive cylinder 41 in the lifting drive assembly 4 drives the mounting plate 42 to move downwards. The downward movement of the mounting plate 42 drives the probe 51 on the connecting plate 5 to move downwards. At the same time, the downward movement of the connecting plate 5 drives the positioning post 52 to move downwards and insert into the positioning hole 653 of the threaded rod 65, improving the accuracy of the contact between the probe 51 and the pins on the circuit board. Under the action of the limiting plate 651 in the threaded rod 65, the connecting plate 5 is hard-limited and stopped, which can ensure that the probe 51 on the connecting plate 5 will not continue to move downwards when it contacts the pins on the circuit board, avoiding damage to the circuit board by the probe 51, and the effect is good. At the same time as the positioning post 52 moves downwards, it presses the buffer post 123, which presses the buffer spring 122 and buffers the positioning post 52. Thus, the probe 51 on the mounting plate 42 is buffered, reducing the impact force when the probe 51 contacts the pins on the circuit board, further preventing the probe 51 from damaging the circuit board. The contact between the probe 51 and the pins of the circuit board completes the test of the circuit board.

[0033] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims. Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A testing device for circuit boards, characterized in that, include: The base (1) is provided with a longitudinal electric cylinder (7) on its top. The longitudinal electric cylinder (7) has a placement plate (8) on its sliding block; A connecting plate (5) is provided above the placement plate (8); The bottom of the connecting plate (5) is provided with multiple probes (51); The bottom corner of the connecting plate (5) is provided with a positioning post (52); The base (1) is provided with a limit adjustment component (6) at the position corresponding to the positioning post (52) to stop the connecting plate (5). The limit adjustment component (6) is provided with a buffer component (12) for buffering the positioning post (52).

2. The circuit board testing device according to claim 1, characterized in that, The limit adjustment assembly (6) includes a threaded hole (68) opened on the top of the base (1) and located directly below the positioning post (52), and a threaded rod (65) is provided inside the threaded hole (68). The threaded rod (65) includes a threaded post (654) disposed inside the threaded hole (68). A limiting plate (651) is provided on the top of the threaded post (654). A connecting bearing (652) is provided at the connection between the limiting plate (651) and the threaded post (654). Both the top of the threaded post (654) and the limiting plate (651) are provided with a through positioning hole (653) that matches the positioning post (52). The side wall of the limiting plate (651) is provided with a horizontal plate (64), the top of the base (1) is provided with a vertical plate (62) that contacts the horizontal plate (64), the side of the vertical plate (62) near the horizontal plate (64) is provided with a scale line (621), and the side wall of the threaded column (654) is provided with a fixing rod (66).

3. The circuit board testing apparatus according to claim 2, characterized in that, The threaded post (654) has a support nut (67) on its side wall that contacts the top of the base (1). The top of the base (1) has a limiting post (63) that penetrates the horizontal plate (64). A connecting block (61) is provided between the top of the limiting post (63) and the top of the vertical plate (62).

4. The circuit board testing apparatus according to claim 2, characterized in that, The buffer assembly (12) includes a blocking plate (121) disposed at the bottom of the threaded post (654), a buffer spring (122) located inside the positioning hole (653) is provided on the top of the blocking plate (121), and a buffer post (123) located inside the positioning hole (653) is provided on the top of the buffer spring (122).

5. The circuit board testing apparatus according to claim 1, characterized in that, The top of the placement plate (8) is symmetrically provided with a pair of positioning adjustment components (11) for positioning the opposite sides of the circuit board. The positioning adjustment assembly (11) includes an adjustment seat (111) disposed on the top of the placement plate (8). A pair of longitudinal moving grooves (1112) are symmetrically provided on the opposite side walls of the adjustment seat (111). A longitudinal moving plate (113) is provided inside each pair of longitudinal moving grooves (1112). A transverse positioning plate (112) is provided on the side of each pair of longitudinal moving plates (113) that is far apart from each other. A longitudinal stop groove (1131) is provided on the top of each pair of longitudinal moving plates (113). A pair of locking members (114) are symmetrically provided on the top of the adjustment seat (111) and respectively contact the pair of longitudinal stop grooves (1131). The top of the placement plate (8) is provided with a horizontal adjustment groove (115), and the bottom of the adjustment seat (111) is provided with a moving block (1111) located inside the horizontal adjustment groove (115). The horizontal adjustment groove (115) is provided with a guide post (116) that passes through the moving block (1111). The top of the guide post (116) is provided with a horizontal stop groove (1161), and the top of the adjustment seat (111) is provided with a stop member (117) that contacts the horizontal stop groove (1161).

6. The circuit board testing apparatus according to claim 5, characterized in that, The locking component (114) includes a locking wing bolt (1141) disposed on the top of the adjusting seat (111) and connected to the longitudinal moving groove (1112). The bottom of the locking wing bolt (1141) is provided with a locking block (1143) located inside the longitudinal stop groove (1131). A connecting bearing (1142) is provided at the connection between the locking wing bolt (1141) and the locking block (1143).

7. The circuit board testing apparatus according to claim 5, characterized in that, The stop (117) includes a stop wing bolt (1171) disposed on the top of the adjusting seat (111) and connected to the transverse stop groove (1161), and the bottom of the stop wing bolt (1171) is provided with a stop disc (1172) located inside the transverse stop groove (1161).

8. The circuit board testing apparatus according to claim 5, characterized in that, The base (1) is provided with a limiting component (10) on its top for limiting the longitudinal movement distance of the placement plate (8). The limiting component (10) includes a limiting sensor (102) disposed on the top of the base (1), and a detection block (103) is disposed at the bottom of the placement plate (8) at a position corresponding to the limiting sensor (102).

9. The circuit board testing apparatus according to claim 8, characterized in that, The limit sensor (102) has a pair of adjustment blocks (101) symmetrically arranged on its side wall. The top of each pair of adjustment blocks (101) is provided with a square groove (1011). The top of each pair of adjustment blocks (101) is provided with a locking bolt (104) that passes through the square groove (1011) and is inserted into the base (1).

10. The circuit board testing apparatus according to claim 1, characterized in that, A column (2) is provided at the top corner of the base (1), and a top plate (3) is provided between the tops of the columns (2). The top plate (3) is provided with a lifting drive assembly (4) for driving the connecting plate (5) to move in the vertical direction. The lifting drive assembly (4) includes a drive cylinder (41) disposed on the top of the top plate (3), and a mounting plate (42) connected to the connecting plate (5) is disposed on the telescopic shaft of the drive cylinder (41). The placement plate (8) is provided with an ejection assembly (9) for ejecting the circuit board. The ejection assembly (9) includes an ejection electric push rod (91) symmetrically arranged at the bottom of the placement plate (8). An ejection plate (92) located at the top of the placement plate (8) is provided on the telescopic shaft of the ejection electric push rod (91). An embedding groove (93) matching the ejection plate (92) is opened on the top of the placement plate (8). The upper surface of the placement plate (8) is flush with the upper surface of the ejection plate (92).

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